1. A computer early warning monitoring circuit is used for monitoring the heat conduction condition of heat conduction paste between a radiator and a central processing unit in a computer host, and is characterized by comprising a first capacitor, an analog-to-digital conversion unit, a control unit and an alarm unit, wherein the first capacitor comprises a first polar plate and a second polar plate, at least part of the heat conduction paste extends to the position between the first polar plate and the second polar plate, and the first polar plate or the second polar plate is electrically connected with the analog-to-digital conversion unit; the analog-to-digital conversion unit is electrically connected with the control unit and is used for converting the analog signal transmitted by the first capacitor into a digital signal; the control unit is electrically connected with the alarm unit and used for calculating the capacitance change of the first capacitor according to the digital signal so as to control the alarm unit to give an alarm.

2. The computer early warning monitoring circuit of claim 1, wherein the first plate is grounded and the second plate is electrically connected to the analog-to-digital conversion unit.

3. The computer early warning monitoring circuit according to claim 1 or 2, further comprising a second capacitor and a multiplexer, wherein the second capacitor comprises a third plate and a fourth plate, the thermal conductive paste at least partially extends between the third plate and the fourth plate, and the third plate or the fourth plate is electrically connected to the multiplexer; the multiplexer is electrically connected to the analog-to-digital conversion unit, and the first capacitor is electrically connected to the multiplexer to be electrically connected to the analog-to-digital conversion unit through the multiplexer.

4. The computer early warning and monitoring circuit according to claim 3, wherein the number of the second capacitors is several, and the second capacitors are all flat capacitors, several third electrode plates are arranged in a line, several fourth electrode plates are arranged in a line, the third electrode plate and the fourth electrode plate are oppositely disposed, and the third electrode plate and the fourth electrode plate are respectively disposed at two opposite sides of the central processor.

5. The computer early warning monitoring circuit of claim 3, wherein the third plate is grounded and the fourth plate is electrically connected to the multiplexer.

6. The computer warning monitoring circuit of claim 1 or 2, wherein the first capacitor is a mica capacitor or a glass-enamel capacitor.

7. The computer early warning monitoring circuit according to claim 1 or 2, further comprising a calibration unit, wherein the calibration unit is configured to calibrate the digital signal output by the analog-to-digital conversion unit and transmit the calibrated digital signal to the control unit.

8. A method of monitoring a computer early warning monitoring circuit according to any of claims 1 to 7, comprising the steps of:

acquiring a computer starting signal;

acquiring the real-time capacitance of a first capacitor according to the computer starting signal;

comparing the real-time capacitance with a first preset capacitance value;

and when the absolute value of the difference between the real-time capacitor and the first preset capacitance value is greater than a first preset value, controlling the alarm unit to alarm.

Background

The computer is commonly called computer, it is an electronic computer for high-speed calculation, it can make numerical calculation and logic calculation, and also has the function of memory, and it is a modern intelligent electronic equipment capable of running according to program and automatically processing mass data at high speed, and is formed from hardware system and software system, and the computer without any software is called bare computer.

Computers can be classified into a supercomputer, an industrial control computer, a network computer, a personal computer and an embedded computer, more advanced computers comprise a biological computer, a photon computer, a quantum computer and the like, the computers usually generate a large amount of heat in the working process, and the service life of the computers is influenced if the heat is not timely dissipated. In the existing computer, in order to timely dissipate heat generated by the cpu during operation, a heat sink and a thermal grease located between the heat sink and the cpu are usually disposed, and the thermal grease can rapidly conduct heat generated by the cpu during operation to the heat sink in time to dissipate the heat. However, over time, the thermal paste tends to dry out, so that heat cannot be conducted to the heat sink in time for heat dissipation, resulting in frequent shutdown or damage to the cpu. Therefore, how to monitor the heat conduction condition of the heat conductive paste to prompt the user to replace the heat conductive paste is a problem to be solved urgently.

Disclosure of Invention

Therefore, it is necessary to provide a computer early warning monitoring circuit and a monitoring method thereof for monitoring the heat conduction condition of the heat conductive paste to prompt a user to replace the heat conductive paste.

In a first aspect, the present invention provides a computer early warning monitoring circuit, configured to monitor a heat conduction condition of a thermal paste between a heat sink and a central processing unit in a computer host, including a first capacitor, an analog-to-digital conversion unit, a control unit, and an alarm unit, where the first capacitor includes a first electrode plate and a second electrode plate, the thermal paste at least partially extends between the first electrode plate and the second electrode plate, and the first electrode plate or the second electrode plate is electrically connected to the analog-to-digital conversion unit; the analog-to-digital conversion unit is electrically connected with the control unit and is used for converting the analog signal transmitted by the first capacitor into a digital signal; the control unit is electrically connected with the alarm unit and used for calculating the capacitance change of the first capacitor according to the digital signal so as to control the alarm unit to give an alarm.

In one embodiment, the first plate is grounded, and the second plate is electrically connected with the analog-to-digital conversion unit.

In one embodiment, the heat conduction device further comprises a second capacitor and a multiplexer, wherein the second capacitor comprises a third plate and a fourth plate, the heat conduction paste at least partially extends to the position between the third plate and the fourth plate, and the third plate or the fourth plate is electrically connected with the multiplexer; the multiplexer is electrically connected to the analog-to-digital conversion unit, and the first capacitor is electrically connected to the multiplexer to be electrically connected to the analog-to-digital conversion unit through the multiplexer.

In one embodiment, the number of the second capacitors is several, and the second capacitors are all flat capacitors, several third electrode plates are arranged in a line, several fourth electrode plates are arranged in a line, the third electrode plate and the fourth electrode plate are arranged in opposite positions, and the third electrode plate and the fourth electrode plate are respectively located on two opposite sides of the central processing unit.

In one embodiment, the third plate is grounded and the fourth plate is electrically connected to the multiplexer.

In one embodiment, the first capacitor is a mica capacitor or a glass-enamel capacitor.

In one embodiment, the computer early warning monitoring circuit further includes a calibration unit, and the calibration unit is configured to calibrate the digital signal output by the analog-to-digital conversion unit and transmit the calibrated digital signal to the control unit.

In a second aspect, this embodiment further discloses a monitoring method of the computer early warning monitoring circuit in any one of the above first aspects, including the following steps:

acquiring a computer starting signal;

acquiring the real-time capacitance of a first capacitor according to the computer starting signal;

comparing the real-time capacitance with a first preset capacitance value;

and when the absolute value of the difference between the real-time capacitor and the first preset capacitance value is greater than a first preset value, controlling the alarm unit to alarm.

The computer early warning monitoring circuit and the detection method at least have the following advantages:

according to the invention, through the cooperation of the first capacitor, the analog-to-digital conversion unit, the control unit and the alarm unit, the first capacitor comprises the first polar plate and the second polar plate, the heat conduction paste at least partially extends to the position between the first polar plate and the second polar plate, and in the use process of the computer, when the heat conduction paste is dried to a certain degree of lamination along with the time, the heat of a central processing unit is influenced to be transferred to the radiator, namely when the absolute value of the difference between the monitored real-time capacitance and the first preset capacitance value is greater than the first preset value, the alarm unit is controlled to alarm, so that a user can know that the heat conduction paste is dried to the degree of lamination influencing the work of the computer, the heat conduction paste can be replaced in time, the computer is well protected, and the service life of the computer is prolonged.

Drawings

FIG. 1 is a schematic diagram of a first embodiment of a computer early warning monitoring circuit according to the present invention;

FIG. 2 is a schematic structural diagram of a first capacitor and a second capacitor of a first embodiment of the computer early warning and monitoring circuit of the present invention, which are coupled to a CPU and a thermal conductive paste;

FIG. 3 is a schematic diagram of a second embodiment of a computer early warning monitoring circuit according to the present invention;

FIG. 4 is a flow chart of a monitoring method of the computer early warning monitoring circuit of the present invention.

Detailed Description

The invention is described in further detail below with reference to the accompanying drawings:

referring to fig. 1 and 2, the present invention discloses a computer early warning monitoring circuit for monitoring the heat conduction condition of the heat conductive paste 200 between the heat sink and the cpu 100 in the host computer, the computer early warning monitoring circuit comprises a first capacitor 1, a second capacitor 2, a multiplexer 3, an analog-to-digital conversion unit 4, a control unit 5 and an alarm unit 6, wherein the first capacitor 1 is a flat capacitor, it comprises a first polar plate 11 and a second polar plate 12, the first polar plate 11 and the second polar plate 12 are oppositely arranged and respectively positioned at two opposite sides of the central processing unit 100, the thermal paste 200 partially extends between the first and second electrode plates 11 and 12, the heat conductive paste 200 may be a heat conductive silicone grease or other material, as long as it can conduct heat, and the material is not particularly limited herein.

The first polar plate 11 is grounded, and the second polar plate 12 is electrically connected with the analog-to-digital conversion unit 4. Of course, in another embodiment, the second plate 12 is grounded, and the first plate 11 is electrically connected to the analog-to-digital conversion unit 4. That is, one of the first plate 11 or the second plate 12 is electrically connected to the analog-to-digital conversion unit 4. More specifically, the multiplexer 3 is electrically connected to the analog-to-digital conversion unit 4, and the first capacitor 1 is electrically connected to the multiplexer 3 to be electrically connected to the analog-to-digital conversion unit 4 through the multiplexer 3. In this embodiment, the first capacitor 1 is a mica capacitor, which has a small temperature coefficient, high stability and high reliability, and is not easily affected by heat generated during the operation of the cpu 100. Preferably, the orthographic projection of the geometric center of the first capacitor 1 on the upper surface of the cpu 100 is located on the geometric center of the cpu 100, so that the drying condition, i.e. the heat conduction condition, of the thermal grease in the hottest area of the cpu 100 can be monitored, thereby protecting the cpu 100 as much as possible and improving the protection effect.

The second capacitor 2 is a plate capacitor, the quantity of the second capacitor 2 is a plurality of, and it includes third polar plate 21 and fourth polar plate 22, third polar plate 21 with fourth polar plate 22 sets up in opposite position and is located respectively the relative both sides in central processing unit 100 position, heat conduction cream 200 part extend to third polar plate 21 with between the fourth polar plate 22, third polar plate 21 ground connection and with first polar plate 11 is located jointly central processing unit 100 is with one side, a plurality of the third polar plate is arranged into a line.

The fourth electrode plate 22 is electrically connected to the multiplexer 3 and is located on the same side of the central processing unit 100 as the second electrode plate 12, a plurality of the fourth electrode plates are arranged in a line, and the third electrode plate 21 and the fourth electrode plate 22 are located on two opposite sides of the central processing unit 100 respectively. In this embodiment, the second capacitor 2 is a mica capacitor, which has a small temperature coefficient, high stability and high reliability, and is not easily affected by heat generated during the operation of the cpu 100.

It is understood that, in another embodiment, the first capacitor 1 and the second capacitor 2 are glass-glazed capacitors, which have the advantages of high temperature resistance, low loss and good stability, and thus are not easily affected by heat generated during the operation of the cpu 100. Of course, the first capacitor 1 and the second capacitor 2 can be selected according to the requirement, and the type thereof is not limited in detail.

The multiplexer 3 is configured to conduct the first capacitor 1 or one of the plurality of second capacitors 2 with the analog-to-digital conversion unit 4 within a preset time, so as to send a capacitance signal of the first capacitor 1 or the second capacitor 2 to the analog-to-digital conversion unit 4. The preset time may be a unit time, and the unit time may be 1 second or 1 minute, and the preset time may be set as needed, and is not specifically limited herein.

Through the cooperation of the multiplexer 3, the first capacitor 1, the second capacitor 2 and the analog-to-digital conversion unit 4, it is not necessary to provide a plurality of analog-to-digital conversion units 4 and reduce the port resources occupying the control unit 5, so as to achieve the purpose of saving cost. In addition, the whole circuit structure is simpler, the wires are convenient to run, and the occupied space in the computer is reduced.

The analog-to-digital conversion unit 4 is electrically connected to the control unit 5, and is configured to convert analog signals transmitted by the first capacitor 1 and the second capacitor 2 into digital signals, so that the control unit 5 can recognize the digital signals. The control unit 5 is electrically connected with the alarm unit 6 and is used for calculating the capacitance change of the first capacitor 1 and the second capacitor 2 according to the digital signal so as to control the alarm unit 6 to alarm. For example, when the capacitance variation value of the first capacitor 1 or the second capacitor 2 is greater than a preset value, the control unit 5 controls the alarm unit 6 to give an alarm. The control unit 5 may include a single chip microcomputer or a programmable logic array, and the alarm unit 6 may include an LED indicator light or a buzzer, which is not limited herein.

In another embodiment, as shown in fig. 3, the computer early warning monitoring circuit further includes a calibration unit 7, where the calibration unit 7 is configured to calibrate the digital signal output by the analog-to-digital conversion unit 4, and transmit the calibrated digital signal to the control unit 5, so as to better avoid the problem of erroneous judgment.

Referring to fig. 4, the present embodiment further discloses a monitoring method of the computer early warning monitoring circuit according to the first embodiment, which includes the following steps:

s1, acquiring a computer starting signal;

the control unit 5 electrically connected with the power supply of the computer obtains the starting signal of the computer when the computer is started.

S2, acquiring the real-time capacitance of the first capacitor 1 according to the computer starting signal;

after the computer is started up, at a preset time, the multiplexer 3 selects the first capacitor 1 to be conducted with the analog-to-digital conversion unit 4, and the control unit 5 acquires the real-time capacitance of the first capacitor 1 through a signal transmitted by the analog-to-digital conversion unit 4. It is understood that the real-time capacitance refers to the capacitance of the first capacitor 1 at that moment.

S3, comparing the real-time capacitor with a first preset capacitance value;

the control unit 5 performs a difference operation on the real-time capacitor and a first preset capacitance value.

And S4, controlling the alarm unit 6 to alarm when the absolute value of the difference between the real-time capacitor and the first preset capacitor value is larger than a first preset value.

When the absolute value of the difference between the real-time capacitor and the first preset capacitance value is greater than a first preset value, that is, the humidity change of the thermal paste 200 is greater than a preset humidity, it indicates that the dryness of the thermal paste has reached a critical value, the control unit 5 controls the alarm unit 6 to send an alarm to prompt a user to replace the thermal paste, otherwise, the cpu 100 is at an overheating risk.

Preferably, after the step S4, the monitoring method further includes the following steps:

sequentially acquiring real-time capacitance of the second capacitor 2;

that is, after the capacitance of the first capacitor 1 is measured, the capacitance of the second capacitor 2 is measured in a preset order.

Respectively comparing the real-time capacitance of the second capacitor 2 with a second preset capacitance value;

and when the absolute value of the difference between the real-time capacitance of the second capacitor 2 and the second preset capacitance value is larger than a second preset value, controlling the alarm unit 6 to alarm.

By detecting the real-time capacitance of the second capacitor 2, the humidity change condition of the heat-dissipating paste can be known more comprehensively, so that the detection accuracy can be improved, the problem that the heat-conducting paste 200 is unevenly smeared to cause overheating of partial areas can be better avoided, the central processing unit 100 is well protected, and the problem that the computer is automatically shut down due to overheating so that a user does not know the reason can be solved. The detection sequence of the second capacitor 2 can be selected according to the requirement, and the detection sequence is not specifically limited herein.

In summary, the present invention utilizes the cooperation among the first capacitor 1, the analog-to-digital conversion unit 4, the control unit 5 and the alarm unit 6, the first capacitor 1 includes a first plate 11 and a second plate 12, the thermal paste 200 extends at least partially between the first plate 11 and the second plate 12, when the thermal paste 200 dries to a certain degree over time during the use of the computer, so that the heat of the cpu 100 is transferred to the heat sink, i.e. when the absolute value of the difference between the monitored real-time capacitance and the first preset capacitance value is larger than the first preset value, the alarm unit 6 is controlled to give an alarm, so that the user can know that the thermal paste 200 is dried to a degree of stratification affecting the operation of the computer, therefore, the heat conducting paste 200 can be replaced in time, the computer is well protected, and the service life of the computer is prolonged.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.