1. A biochemical analyzer for blood gas, comprising:

the blood gas biochemical analyzer comprises a blood gas analyzer body and a test card, wherein the test card is matched with the blood gas biochemical analyzer body for use;

the blood gas biochemical analyzer body comprises a shell, a test card base assembly, a signal acquisition assembly, a heat dissipation system assembly, a motion assembly and a main control board;

a main control board is arranged on the shell;

the test card base assembly is arranged in the shell and is provided with a test card platform for placing a test card, the test card base assembly is provided with a base, and the base is provided with a test card hand feeling assembly and a card insertion in-place judging assembly;

the signal acquisition assembly is arranged on the test card base assembly, a signal board PCBA is arranged on the signal acquisition assembly, and a probe is welded on the signal board PCBA;

the motion assembly is connected with the test card base assembly and the signal acquisition assembly;

the heat dissipation system assembly is mounted within the housing, the heat dissipation system assembly including a fan and a temperature sensor.

2. The biochemical blood gas analyzer according to claim 1, wherein the base assembly further includes a rotation arm and a lifting plate, a ball portion of the rotation arm slidably contacts a lower surface of the lifting plate, an upper surface of the lifting plate has a protrusion, a first spring is fixed to the protrusion, a bottom heating plate mounting base is hung from the other end of the first spring, and a bottom ceramic heating plate is attached to the bottom heating plate mounting base.

3. The biochemical blood gas analyzer according to claim 2, wherein the protrusion on the lifting plate is a plurality of support posts, each support post is fixed with a first spring, a hole matched with the support post is formed on the base on the upper surface of the lifting plate, and the support posts are inserted into the holes and constrained by the rotating arm.

4. The biochemical blood gas analyzer according to claim 2, wherein the signal collecting assembly includes a mounting case, a sealing plate, a rotating shaft, a left side plate and a right side plate, the PCBA is fixed on the mounting case, the sealing plate is fixed on the lower portion of the mounting case, and the mounting case and the sealing plate jointly play a role in sealing and shielding the PCBA.

5. The biochemical blood gas analyzer according to claim 4, wherein the two sides of the mounting housing are sleeved on rotating shafts, the rotating shafts are respectively embedded on the left side plate and the right side plate, and the rotating arm is connected with the signal acquisition assembly.

6. The biochemical blood gas analyzer according to claim 4, wherein the signal collecting assembly is provided with a probe support assembly, the probe support assembly comprises a probe support, a guide shaft, a second spring, a top heating plate mounting seat and a top ceramic heating plate, the probe is mounted in the probe support, the probe support is provided with a through hole, the through hole of the probe support is penetrated by the guide shaft, the second spring is sleeved on the guide shaft, the top heating plate mounting seat is fixed at the lower part of the second spring, and the top ceramic heating plate is attached to the top heating plate mounting seat.

7. The biochemical blood gas analyzer according to claim 4, wherein the motion assembly comprises a rotary stepping motor, a mounting frame, a coupler, a pinion shaft, a cam, a pinion and a bull gear, the rotary stepping motor is connected with the coupler, the coupler is connected with the pinion shaft and the cam shaft, the pinion shaft is connected with the cam shaft, and the cam shaft is connected with the signal acquisition assembly through the cam.

8. The biochemical blood gas analyzer according to claim 7, wherein the rotary arm and the mounting case are electrically connected to a rotary stepping motor, the rotary stepping motor is fixed to the mounting frame, a coupler is fixed to the rotary stepping motor, a pinion shaft and a cam shaft are fixed to the coupler, a pinion is fixed to the pinion shaft, the pinion is meshed with a gear wheel, the gear wheel is fixed to the cam shaft, a cam is further fixed to the cam shaft, and the cam is connected to the signal acquisition assembly.

9. The biochemical blood gas analyzer according to claim 1, wherein a lower rear cover is provided below the back of the housing, a fan is mounted on the lower rear cover, the lower rear cover is further provided with heat dissipation holes, and a center line of the decorative cover is aligned with a center line of the test card base assembly, an axial line of the fan, and a center line of the heat dissipation holes of the lower rear cover.

10. The biochemical blood gas analyzer of claim 1, wherein the plurality of temperature sensors are disposed on the base assembly of the test card, at an air inlet of the fan, and at an opening at a right side of the housing.

Background

The blood gas biochemical analyzer is widely applied to accurate and rapid detection in operating rooms, ICUs and other occasions, and the accuracy of the test is mainly influenced by two boundary conditions of internal temperature and internal signal interference of the analyzer. The like products on the market at present have two problems, one is that the internal temperature of the instrument is not controlled or is not ideal enough, and the internal temperature fluctuation is large in the test process, so that the accuracy of signal acquisition is influenced; the other is that the protection to the signal acquisition module is not enough, and the high-low frequency signal in the machine can directly interfere the signal acquisition module, thereby influencing the accuracy of the signal acquisition.

The prior art has at least the following disadvantages:

1. the internal temperature of the instrument is not controlled or is not ideally controlled, and the internal temperature fluctuation is large in the test process, so that the accuracy of signal acquisition is influenced;

2. the protection to the signal acquisition module is not enough, and the high-low frequency signal in the machine can directly interfere the signal acquisition module, so that the accuracy of the signal acquisition is influenced.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a blood gas biochemical analyzer, which comprises a blood gas analyzer body and a test card, wherein the test card is matched with the blood gas biochemical analyzer body for use; the blood gas biochemical analyzer body comprises a shell, a test card base assembly, a signal acquisition assembly, a heat dissipation system assembly, a motion assembly and a main control board; the shell is provided with a main control board, a decorative cover and a display touch screen; the test card base assembly is arranged in the shell and is provided with a test card platform for placing a test card, the test card base assembly is provided with a base, and the base is provided with a test card hand feeling assembly and a card insertion in-place judging assembly; the signal acquisition assembly is arranged on the test card base assembly, a signal board PCBA is arranged on the signal acquisition assembly, and a probe is welded on the signal board PCBA; the motion assembly is connected with the test card base assembly and the signal acquisition assembly; a cooling system assembly is mounted within the housing, the cooling system assembly including a fan and a temperature sensor. The invention carries out accurate temperature control to ensure the accuracy of the test, essentially solves the influence of temperature change on signal acquisition, and saves a large amount of labor cost and material cost; the signal acquisition and the electric signals related to the signal acquisition are fully protected and shielded, so that the probability of generating abnormal signals is reduced, and the test accuracy is ensured.

The invention provides a blood gas biochemical analyzer, comprising: the blood gas analyzer comprises a blood gas analyzer body and a test card, wherein the test card is matched with the blood gas biochemical analyzer body for use;

the blood gas biochemical analyzer body comprises a shell, a test card base assembly, a signal acquisition assembly, a heat dissipation system assembly, a motion assembly and a main control board;

the shell is provided with a main control board, and the shell is also provided with a decorative cover and a display touch screen;

the test card base assembly is arranged in the shell and is provided with a test card platform for placing a test card, the test card base assembly is provided with a base, and the base is provided with a test card hand feeling assembly and a card insertion in-place judging assembly;

the signal acquisition assembly is arranged on the test card base assembly, a signal board PCBA is arranged on the signal acquisition assembly, and a probe is welded on the signal board PCBA;

the motion assembly is connected with the test card base assembly and the signal acquisition assembly;

the heat dissipation system assembly is mounted within the housing, the heat dissipation system assembly including a fan and a temperature sensor.

Preferably, the test card base assembly further comprises a rotating arm and a lifting plate, the head of the rotating arm is in sliding contact with the lower surface of the lifting plate, the upper surface of the lifting plate is provided with a protrusion, a first spring is fixed at the protrusion, the other end of the first spring is suspended with a bottom heating plate mounting seat, and a bottom ceramic heating plate is attached to the bottom heating plate mounting seat.

Preferably, the protrusion on the lifting plate is a plurality of support columns, each support column is fixed with a first spring, a hole matched with the support column is formed in the base on the upper surface of the lifting plate, and the support columns are inserted into the holes and constrained by the rotating arms.

Preferably, the swinging boom is anticlockwise rotary motion, promotes lifter plate upward movement, lifter plate upward movement compresses first spring, first spring receives the extrusion, promotes bottom heating plate mount pad upward movement is in with the laminating of bottom ceramic heating plate the lower surface in the reaction zone of test card, it is right the lower surface of test card heats.

Preferably, the signal acquisition subassembly includes installation shell, shrouding, rotation axis, left side board and right side board, signal board PCBA fixes on the installation shell, the installation shell lower part is fixed with the shrouding, installation shell and shrouding are common right signal board PCBA plays sealed and shielding effect.

Preferably, the two sides of the mounting shell are sleeved on the rotating shaft, the rotating shaft is embedded on the left side plate and the right side plate respectively, and the rotating arm is connected with the signal acquisition assembly.

Preferably, install the probe bracket subassembly on the signal acquisition subassembly, the probe bracket subassembly includes probe support, guiding axle, second spring, top heating plate mount pad and top ceramic heating plate, the probe is installed in the probe support, the probe support has the through-hole, the through-hole of probe support is passed by the guiding axle, the cover has the second spring on the guiding axle, the lower part of second spring is fixed with top heating plate mount pad, the laminating has top ceramic heating plate on the top heating plate mount pad.

Preferably, clockwise rotary motion is made to the installation shell, drives signal board PCBA rotary motion is fixed probe support compression second spring on the signal board PCBA, the second spring receives the extrusion, promotes top heating plate mount pad downstream is in with the laminating of top ceramic heating plate the upper surface in the reaction zone of test card, it is right the upper surface in the reaction zone of test card heats.

Preferably, the motion assembly comprises a rotary stepping motor, a mounting frame, a coupler, a pinion shaft, a cam, a pinion and a gearwheel, the rotary stepping motor is connected with the coupler, the coupler is connected with the pinion shaft and the cam shaft, the pinion shaft is connected with the cam shaft, and the cam shaft is connected with the signal acquisition assembly through the cam.

Preferably, the swinging boom with the installation shell is connected with rotatory step motor electricity, rotatory step motor fixes on the mounting bracket, rotatory step motor on be fixed with the shaft coupling, be fixed with pinion shaft and camshaft on the shaft coupling, be fixed with the pinion on the pinion shaft, pinion and gear wheel meshing, the gear wheel is fixed on the camshaft, still is fixed with the cam on the camshaft, the cam with the signal acquisition subassembly is connected.

Preferably, rotatory step motor do clockwise rotation, drive the coupling rotation on it of rigid coupling, the coupling drives the pinion shaft rotation on it of rigid coupling, the pinion shaft drives pinion rotation on it of rigid coupling, the pinion drives the gear wheel rotation of meshing with it, the gear wheel drives camshaft rotation on it of rigid coupling, the camshaft drives cam rotation on it of rigid coupling, the cam rotates and pushes down the signal acquisition subassembly carries out the collection processing analysis of signal and surface heating on the test card, the signal acquisition subassembly pushes down the swinging boom simultaneously, carries out surface heating under the test card.

Preferably, a lower rear cover is arranged below the back of the shell, a fan is mounted on the lower rear cover, the lower rear cover is further provided with heat dissipation holes, and the center line of the decorative cover, the center line of the test card base assembly, the axis line of the fan and the center line of the heat dissipation holes of the lower rear cover are on the same straight line.

Preferably, the temperature sensors are arranged on the test card base assembly, at an air inlet of the fan and at an opening on the right side of the shell respectively.

Compared with the prior art, the invention has the following beneficial effects:

(1) the invention is provided with three temperature sensors, the three temperature sensors are used for accurately controlling the temperature of the test card platform, and the temperature is controlled by comparing the temperatures at the three positions and dynamically adjusting the rotating speed of the fan, so that the influence of temperature change on signal acquisition is essentially solved, and a large amount of labor cost and material cost are saved.

(2) In the test process, the upper and lower heating sheets respectively heat the upper and lower surfaces of the test card simultaneously, so that the influence of the temperature difference of the test card on signal acquisition is avoided.

(3) The invention reduces the probability of generating abnormal signals by fully protecting and shielding the signal acquisition and the electric signals related to the signal acquisition, thereby ensuring the test accuracy.

Drawings

FIG. 1 is a perspective view of an embodiment of the present invention in half section of a housing assembly.

Fig. 2 is a perspective view of a housing of one embodiment of the present invention.

FIG. 3 is a perspective view of a test card base assembly of one embodiment of the present invention.

FIG. 4 is a cross-sectional view of a test card base assembly of one embodiment of the present invention.

Fig. 5 is a perspective view of a signal acquisition assembly of one embodiment of the present invention.

Figure 6 is a perspective view of a probe support assembly according to one embodiment of the present invention.

Fig. 7 is a perspective view of a heat dissipation system assembly of one embodiment of the present invention.

FIG. 8 is a schematic view of a test card feel assembly installation of one embodiment of the present invention, where the solid lines are the test card feel assemblies.

Fig. 9 is a perspective view of a card insertion position determining assembly according to an embodiment of the present invention.

Fig. 10 is a perspective view of a motion assembly of one embodiment of the present invention.

FIG. 11 is a schematic view of the direction of airflow in accordance with one embodiment of the present invention.

Figure 12 is a schematic view of the initial position of the upper and lower heat patches, in accordance with one embodiment of the present invention.

FIG. 13 is a schematic diagram illustrating the operation of the upper and lower heat patches according to one embodiment of the present invention.

FIG. 14 is a schematic diagram of a signal board PCBA shield in accordance with one embodiment of the present invention.

FIG. 15 is a schematic diagram of a temperature sensor layout according to an embodiment of the present invention.

Fig. 16 is a partial enlarged view of portion B of fig. 15;

fig. 17 is a partial enlarged view of portion C of fig. 15;

fig. 18 is a partial enlarged view of portion D of fig. 15;

FIG. 19 is a schematic diagram of a communication power supply between a signal board PCBA and a main board according to an embodiment of the present invention;

fig. 20 is a partially enlarged view of a portion a in fig. 19;

FIG. 21 is a diagram of a test card according to an embodiment of the present invention.

Fig. 22 is a perspective view of one embodiment of the present invention.

FIG. 23 is a schematic representation of the state of the fluid after the hydraulic fluid bag in accordance with one embodiment of the present invention.

FIG. 24 is a schematic view of the state of the liquid after pressing the air bag according to one embodiment of the present invention

In the figure, 1-a blood gas biochemical analyzer body, 11-a shell, 12-a test card base assembly, 13-a signal acquisition assembly, 14-a heat dissipation system assembly, 15-a motion assembly, 16-a main control board, 17-a display touch screen, 111-a decorative cover, 112-an upper cover, 113-a base, 114-a C-shaped cover, 121-a base assembly, 122-a motor support assembly, 123-a rotating arm, 124-a lifting plate, 125-a first spring, 126-a bottom heating plate mounting seat, 127-a bottom ceramic heating plate, 131-a signal board PCBA, 132-a probe, 133-a mounting shell, 134-a sealing plate, 135-a rotating shaft, 136-a left side plate, 137-a right side plate, 138-a probe support assembly, 141-a lower rear cover, 142-fan, 143-first temperature sensor, 144-second temperature sensor, 145-third temperature sensor, 151-mounting rack, 152-coupler, 153-pinion shaft, 154-camshaft, 155-pinion, 156-gearwheel, 157-cam, 158-rotary stepping motor, 161-main control board power supply port, 162-main control board communication port, 1111-air inlet, 1211-test card hand feeling component, 1212-card insertion in-place judging component, 1221-liquid bag motor, 1222-liquid bag pressure head, 1223-air bag motor, 1224-air bag pressure head, 1311-power supply line, 1312-communication line, 1313-signal board PCBA power supply interface, 1314-signal board PCBA communication interface, 1381-probe support, 1382-guide shaft, 1383-second spring, 1384-top heating plate mounting seat, 1385-top ceramic heating plate, 1411-heat dissipation hole;

2-test card, 21-external sample, 22-air sac, 23-PAD, 24-liquid bag, 25-reaction area and 26-channel internal electrode.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings.

The invention provides a blood gas biochemical analyzer, comprising: the blood gas analyzer comprises a blood gas analyzer body 1 and a test card 2, wherein the test card 2 is matched with the blood gas biochemical analyzer body 1 for use;

the blood gas biochemical analyzer body 1 comprises a shell 11, a test card base component 12, a signal acquisition component 13, a heat dissipation system component 14, a motion component 15 and a main control board 16;

the main control board 16 is arranged on the shell 11, and the decorative cover 111 and the display touch screen 17 are also arranged on the shell 11;

the test card base assembly 12 is installed in the housing 11, the test card base assembly 12 is provided with a test card platform for placing a test card, the test card base assembly 12 is provided with a base assembly 121, and the base assembly 121 is provided with a test card hand feeling assembly 1211 and a card insertion in-place judging assembly 1212;

the signal acquisition component 13 is mounted on the test card base component 12, a signal board PCBA131 is arranged on the signal acquisition component 13, and a probe 132 is welded on the signal board PCBA 131;

the motion assembly 15 is connected with the test card base assembly 12 and the signal acquisition assembly 13;

the heat dissipation system component 14 is mounted in the housing 11, and the heat dissipation system component 14 includes a fan 142 and a temperature sensor 143.

In a preferred embodiment, the test card base assembly 12 further includes a rotating arm 123 and a lifting plate 124, a ball portion of the rotating arm 123 is in sliding contact with a lower surface of the lifting plate 124, an upper surface of the lifting plate 124 has a protrusion, a first spring 125 is fixed to the protrusion, a bottom heater plate mounting seat 126 is hung from the other end of the first spring 125, and a bottom ceramic heater plate 127 is attached to the bottom heater plate mounting seat 126.

In a preferred embodiment, the protrusion on the lifting plate 124 is a plurality of supporting posts, each supporting post is fixed with a first spring 125, a hole matched with the supporting post is formed on the base on the upper surface of the lifting plate 124, and the supporting post is inserted into the hole and constrained by the rotating arm 123.

In a preferred embodiment, the rotating arm 123 rotates counterclockwise to push the lifting plate 124 to move upward, the lifting plate 124 moves upward to compress the first spring 125, the first spring 125 is pressed to push the bottom heating plate mounting seat 126 to move upward, and the bottom ceramic heating plate 127 is attached to the lower surface of the reaction area 25 of the test card 2 to heat the lower surface of the reaction area 25 of the test card 2.

In a preferred embodiment, the signal collecting assembly 13 includes a mounting case 133, a cover plate 134, a rotating shaft 135, a left side plate 136 and a right side plate 137, the signal board PCBA131 is fixed on the mounting case 133, the cover plate 134 is fixed on the lower portion of the mounting case 133, and the mounting case 133 and the cover plate 134 jointly play a role in sealing and shielding the signal board PCBA 131.

In a preferred embodiment, the two sides of the mounting shell 133 are sleeved on the rotating shafts 135, the rotating shafts 135 are respectively embedded on the left side plate 136 and the right side plate 137, and the rotating arm 123 is connected with the signal acquisition assembly 13.

In a preferred embodiment, the signal collection assembly 13 is mounted with a probe support assembly 138, the probe support assembly 138 includes a probe support 1381, a guide shaft 1382, a second spring 1383, a top heating plate mount 1384 and a top ceramic heating plate 1385, the probe 132 is mounted in the probe support 1381, the probe support 1381 has a through hole, the through hole of the probe support 1381 is penetrated by the guide shaft 1382, the guide shaft 1382 is sleeved with the second spring 1383, the top heating plate mount 1384 is fixed to the lower part of the second spring 1383, and the top heating plate mount 1384 is attached with the top ceramic heating plate 1385.

In a preferred embodiment, the mounting shell 133 rotates clockwise to drive the signal board PCBA131 to rotate, the probe support 1381 fixed on the signal board PCBA131 compresses the second spring 1383, the second spring 1383 is compressed to push the top heating plate mounting seat 1384 to move downward, the top ceramic heating plate 1385 is attached to the upper surface of the reaction region 25 of the test card 2, and the upper surface of the reaction region 25 of the test card is heated.

In a preferred embodiment, the moving assembly 15 includes a rotary stepping motor 158, a mounting frame 151, a coupler 152, a pinion shaft 153, a cam shaft 154, a cam 157, a pinion 155 and a gearwheel 156, the rotary stepping motor 158 is connected with the coupler 152, the coupler 152 is connected with the pinion shaft 153 and the cam shaft 154, the pinion shaft 153 is connected with the cam shaft 154, and the cam shaft 154 is connected with the signal acquisition assembly 13 through the cam 157.

In a preferred embodiment, the rotating arm 123 and the mounting housing 133 are electrically connected to a rotating stepping motor 158, the rotating stepping motor 158 is fixed to the mounting frame 151, a coupler 152 is fixed to the rotating stepping motor 158, a pinion shaft 153 and a cam shaft 154 are fixed to the coupler 152, a pinion 155 is fixed to the pinion shaft 153, the pinion 155 is engaged with a bull gear 156, the bull gear 156 is fixed to the cam shaft 154, a cam 157 is further fixed to the cam shaft 154, and the cam 157 is connected to the signal acquisition assembly 13.

As a preferred embodiment, the rotating stepping motor 158 rotates clockwise to drive the coupling 152 fixedly connected to it to rotate, the coupling 152 drives the pinion shaft 153 fixedly connected to it to rotate, the pinion shaft 153 drives the pinion 155 fixedly connected to it to rotate, the pinion 155 drives the bull gear 156 engaged with it to rotate, the bull gear 156 drives the camshaft 154 fixedly connected to it to rotate, the camshaft 154 drives the cam 157 fixedly connected to it to rotate, the cam 157 rotates to press down the signal acquisition assembly 13 to perform signal acquisition, processing and analysis and upper surface heating of the test card, and the signal acquisition assembly 13 simultaneously presses down the rotating arm 123 to perform lower surface heating of the test card.

The working state of the motor is as follows: obtaining a first signal, and rotating clockwise to complete the actions; then a second signal is obtained, the motor stops rotating, but a holding torque is still in a working state; and finally, three signals are obtained, the motor rotates anticlockwise, and the motor is stopped after being reset to the initial position.

The rotary stepper motor 158 provides a power source, and is transmitted to the mounting housing 133 through a series of transmissions, so that the mounting housing 133 is rotated from an initial inclination to a rotation parallel to the horizontal plane.

The cover plate 134 is fixed to the mounting case 133, and when the mounting case 133 rotates, the cover plate 134 rotates to press the rotation arm 123 downward, thereby rotating the rotation arm 123. The movement of the mounting shell 133 and the rotating arm 123 is synchronized, and the mounting shell 133 functions to transmit power to the rotating arm 123.

In a preferred embodiment, a lower rear cover 141 is disposed below the back of the housing 11, the fan 142 is mounted on the lower rear cover 141, the lower rear cover 141 is further provided with heat dissipation holes 1411, and a center line of the decoration cover 11 is aligned with a center line of the test card base assembly 12, an axial line of the fan 142, and a center line of the heat dissipation holes 1411 of the lower rear cover 141.

In a preferred embodiment, the plurality of temperature sensors are a first temperature sensor 143, a second temperature sensor 144, and a third temperature sensor 145, which are respectively disposed on the test card base assembly 12, at the air inlet 1111 of the fan, and at the opening on the right side of the housing.

The first temperature sensor 143 in the region of the test card base assembly is used for testing the temperature of the card platform in real time, and during the test process, the test card works in the test platform, and the temperature fluctuation in the region directly influences the quality of the test data.

The second temperature sensor 144 at the air inlet 1111 detects the temperature at the air inlet 1111 of the fan in real time, wherein the temperature is reflected by the temperature rise of the whole machine.

The third temperature sensor 145 at the opening on the right side of the housing is for detecting the external ambient temperature in real time, which serves as a reference.

The system collects the values of the three temperature sensors, analyzes and processes the data, and controls the rotating speed of the fan 142 by adjusting the PWM, so that the temperature inside the shell 11 can be kept in dynamic balance, and the test accuracy is ensured.

According to an embodiment of the present invention, the decorative cover 111 is fixed on the housing 11 through interference fit between the protruding columns on the back surface and the holes on the housing 11, the decorative cover 111 serves as an air inlet 1111 of the heat dissipation system component, external air can flow into the interior of the blood gas biochemical analyzer housing 11 through the air inlet 1111 of the decorative cover 111, the lower back cover 180 is provided with the cooling fan 142 and is provided with a plurality of long-waist-circle heat dissipation holes 1411, after the air in the interior of the blood gas biochemical analyzer housing 11 is extracted by the fan 142, the air is exhausted out of the housing 11 through the long-waist-circle heat dissipation holes 181, so as to complete the exchange of the internal air and the external air, except the air inlet 1111, the rest of the housing 11 is completely closed, thereby ensuring the uniqueness of the air inlet, and avoiding the temperature fluctuation caused by the turbulence of the air flow, thereby affecting the accuracy of the test.

According to a specific embodiment of the present invention, in terms of structural design, the center line of the decorative cover 11, the center line of the test card base assembly 12, the axis line of the fan 142, and the center line of the heat dissipation hole 1411 of the lower rear cover 141 are on the same straight line, so as to ensure the shortest air duct and the lowest wind resistance, and effectively take away the heat inside the machine in time, and prevent the temperature rise inside from acting on the components of the signal board PCBA131 in a conduction and radiation manner, thereby affecting the precision of the test.

According to one embodiment of the present invention, the periphery of the signal board PCBA131 is covered by the mounting shell 133, and the bottom of the signal board PCBA131 is sealed by the sealing plate 134, so that the signal board PCBA131 can be completely sealed, and only the probes 132 at the head and the 2 sockets at the tail are exposed, so that even if air convection exists in the housing 11, the air convection does not act on the components of the signal board PCBA131, thereby affecting the accuracy of the test.

According to an embodiment of the present invention, during the testing process of the test card 2, the reaction region 25 is closely attached by the top ceramic heating plate 1385 and the bottom ceramic heating plate 127, when the external sample 21 flows through the reaction region 25, the top ceramic heating plate 1385 and the bottom ceramic heating plate 127 heat the external sample 21 together, so as to instantaneously raise the temperature of the external sample 21 to be consistent with the temperature in the housing 11, in order to prevent the temperature from being too high, the top ceramic heating plate 1385 and the bottom ceramic heating plate 127 are respectively provided with thermocouples for real-time temperature detection, and the temperature is stabilized by the PID algorithm, thereby ensuring the accuracy of the test.

The test card 2 is initially placed in an external environment, and the temperature of the test card is consistent with the temperature of the external environment; after the test card 2 inserts the test card platform, can produce the heat because of the inside various components and parts of machine normal during operation, the heat can make the inside temperature rise that produces of machine, and test card 2 can form a difference in temperature with the test card platform, and the precision of test can be influenced in the existence of this difference in temperature, and the upper and lower surface to the test card that the heating plate developments and quick of upper and lower two places heat, makes it can be in the very short time, reaches dynamic balance with the temperature of test card platform.

In the prior art, compensation is usually performed on an algorithm through a large amount of test data to compensate for the influence of internal temperature rise and temperature difference between a test card and a test card platform on test precision. The invention can automatically and intelligently control the temperature accurately to ensure the testing precision and save a large amount of labor and material cost.

Signal board PCBA131 is all around covered by installation shell 133, shrouding 134 seals its bottom again, signal board PCBA131 just can be complete sealed like this, only spill 2 patch sockets of a plurality of probes 132 and the afterbody of head, the material of installation shell 133 and shrouding 134 is with being the aluminum alloy material, can carry out better absorption and reflection to the interfering signal of outside, the interfering signal of having ensured the outside can not influence inside signal board PCBA131, the gap of opening part all < 4mm simultaneously, and outside signal all is low frequency signal, be not enough to see through this narrow and small gap, just because there is fine electromagnetic shield, thereby can guarantee the accuracy of test.

The signal acquisition is low-frequency weak current signals, the signal acquisition is millivolt and nanoampere, and interference can directly influence a test result. The invention fully protects and shields the signal acquisition and the electric signals related to the signal acquisition, avoids the possibility of generating abnormal signals and further improves the test accuracy.

According to a specific embodiment of the present invention, in terms of structural design, the signal board PCBA131 communication interface 1314 is arranged at the tail end, and the main control board communication port 162 is arranged at the head end, so that the signal board PCBA131 communication interface 1314 is connected with the main control board communication port 162 end to end, the linear distance between the signal board PCBA131 communication interface and the main control board communication port is only 40mm, the length of the communication line 1312 connecting the two interfaces is only 70mm, and the communication line 1312 is designed with a shielding function to ensure the reliability of the path of the signal collected and transmitted to the main control board 16, thereby ensuring the precision of the test.

According to a specific embodiment of the present invention, in terms of structural design, the main control board power supply port 161 and the main control board communication port 162 are arranged in parallel, and the signal board PCBA power supply interface 1313 is connected to the main control board power supply port 161 through the power supply line 1311.

The working principle is as follows:

before the test is performed, the test card 2 is removed and an external sample 21 is added from the sample addition port (the sample is usually human blood).

After the test card 2 is inserted into the test card platform, the side wall of the front end of the test card 2 presses the tact switch on the card-insertion-in-place judging component 1212 into the slot of the tact switch, so that an electrical signal is triggered, and the system judges that the test card 2 is inserted and can detect the insertion.

By clicking the "test button" on the display touch screen 17, the system will start the detection process:

(1) the rotary stepper motor 158 starts to work, and through a series of actions of the moving mechanism, the probe 132 moves downwards to be in contact with the PAD23 on the test card 2, and an electrical signal on the test card 2 can be transmitted to the probe 132 through the PAD23 on the test card 2, and then transmitted to the system through the probe 132 for analysis, so as to obtain a final test result.

(2) When the probe 132 is in contact with the PAD23 on the test card 2, the system will issue a command to drive the liquid bag motor 1221 to move downward, the liquid bag pressure head 1222 fixed on the liquid bag motor 1221 will press downward and squeeze the liquid bag, the label liquid in the liquid bag 24 (the purpose of the label liquid is to test a reference value) flows out, and flows through the electrodes 26 in each channel, and the signals on the electrodes will be transmitted to the probe 132 by the PAD23, and then transmitted to the system for data analysis.

(3) After the system receives a sufficient signal generated by the marking liquid, the system drives the air bag motor 1223 to move downwards, and the air bag pressure head 1224 fixedly connected to the air bag motor 1223 presses downwards and extrudes the air bag 22; the air bag 22 deforms, the gas in the air bag 22 pushes the sample to flow, and the original standard liquid is pushed away after the sample flows through the channel and occupies the original position of the standard liquid; at this time, a new signal is generated on the electrode, and the signal is transmitted to the probe 132 by the PAD, and then transmitted to the system for data analysis (the signal generated by the standard solution is a reference value, and the generated signal is compared with the reference value to calculate the content of the element in the sample)

(4) After the analysis is finished, all the motion mechanisms are reset.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.