1. The utility model provides a novel fine motion detects sensor, includes shell, foil gage and connecting terminal, the foil gage is located the shell, the output side of foil gage with connecting terminal connects, its characterized in that, the sensor still includes cantilever beam and gravity bobble, the one end of cantilever beam is fixed the inner chamber of shell, the other end of cantilever beam is equipped with hemisphere recess form elastomer, place in the elastomer the gravity bobble, the response side of foil gage covers the top surface of cantilever beam.

2. The novel fine motion detection sensor of claim 1, wherein the cantilevered beam has a longitudinal width at one end that is greater than a longitudinal width at the other end.

3. The novel fine motion detection sensor of claim 2, wherein said cantilever beam is horizontally disposed in a T-shape.

4. The sensor according to any one of claims 1 to 3, wherein the housing comprises an upper housing and a lower housing, the upper housing is fixedly mounted on the lower housing, the upper housing is provided with an upper mounting groove, the lower housing is provided with a lower mounting groove, a cavity formed by the upper mounting groove and the lower mounting groove is matched with the cantilever beam in shape, and one end of the lower housing is provided with a slot of the connecting terminal.

5. The sensor according to any one of claims 1 to 3, wherein said connecting terminals are connected to the lower case in a plug-in manner, inner ends of said connecting terminals are electrically connected to the output side of said strain gauge, and outer ends of said connecting terminals extend out of said lower case.

Background

The existing micro-motion sensor comprises a shell, a strain gauge and a connecting terminal, wherein the strain gauge is located at the deformation of a sensing detection end, the output side of the strain gauge is connected with the connecting terminal, and the strain gauge is located in the shell. The sensitivity of the strain gauge is poor, and the applicability is poor.

Disclosure of Invention

In order to overcome the defects of poor sensitivity and poor applicability of the existing strain gauge in a micro-motion sensing mode, the invention provides a novel micro-motion detection sensor with improved sensitivity and good adaptability.

The technical scheme adopted by the invention for solving the technical problems is as follows:

the utility model provides a novel fine motion detects sensor, includes shell, foil gage and connecting terminal, the foil gage is located the shell, the output side of foil gage with connecting terminal connects, its characterized in that, the sensor still includes cantilever beam and gravity bobble, the one end of cantilever beam is fixed the inner chamber of shell, the other end of cantilever beam is equipped with hemisphere recess form elastomer, place in the elastomer the gravity bobble, the response side of foil gage covers the top surface of cantilever beam.

Further, the longitudinal width of one end of the cantilever beam is larger than that of the other end. This structural form is to further enhance the sensitivity.

Preferably, the cantilever beam is in a horizontally arranged T shape.

Still further, the shell includes epitheca and inferior valve, the epitheca fixed mounting be in on the inferior valve, the epitheca is equipped with the mounting groove, the inferior valve is equipped with down the mounting groove, go up the mounting groove with down the shape of the common cavity that forms of mounting groove with the cantilever beam matches, the one end of inferior valve is equipped with connecting terminal's draw-in groove.

Preferably, the connecting terminals are connected with the lower shell in a plug-in mode, the inner ends of the connecting terminals are electrically connected with the output side of the strain gauge, and the outer ends of the connecting terminals extend out of the lower shell.

In the invention, in order to improve the sensitivity of the strain gauge, the structural form of a cantilever beam is designed, one end of the cantilever beam is fixed, and the other end of the cantilever beam is suspended; particularly, a hemispherical groove-shaped elastic body and a gravity ball are designed at the suspended end, when the object to be detected slightly vibrates, vibration information can be effectively sensed on the cantilever beam, and the whole cantilever beam generates micro deformation and is sensed by a strain gauge; the mass of the gravity ball is given according to the detection object and the sensitivity requirement.

The invention has the following beneficial effects: 1. the sensitivity is improved, and the adaptability is good; 2. the whole sensor is highly integrated, the installation is rapid and convenient, the terminal type plug-in is connected with the main control component, and the terminal type plug-in is totally closed, dustproof and foreign matter-proof.

Drawings

FIG. 1 is an exploded view of the novel micro-motion detection sensor.

Fig. 2 is a cross-sectional view of fig. 1.

Fig. 3 is an external view of the novel fine motion detection sensor.

Fig. 4 is a three-dimensional view of the combination of the cantilever beam and the connection terminal.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

Referring to fig. 1-4, a novel micro-motion detection sensor comprises a shell, a strain gauge 3 and a connecting terminal 4, wherein the strain gauge 3 is positioned in the shell, the output side of the strain gauge 3 is connected with the connecting terminal 4, the sensor further comprises a cantilever beam 5 and a gravity ball 6, one end of the cantilever beam 5 is fixed in an inner cavity of the shell, the other end of the cantilever beam 5 is provided with a hemispherical groove-shaped elastic body 51, the gravity ball 6 is placed in the elastic body 51, and the sensing side of the strain gauge 3 covers the top surface of the cantilever beam 5.

Further, the cantilever beam 5 has one end with a longitudinal width larger than that of the other end. This structural form is to further enhance the sensitivity.

Preferably, the cantilever 5 is in a horizontally arranged T shape.

Still further, the shell includes epitheca 1 and inferior valve 2, 1 fixed mounting of epitheca is in on inferior valve 2, epitheca 1 is equipped with the mounting groove, inferior valve 2 is equipped with down the mounting groove, the shape of the common cavity that forms of mounting groove and lower mounting groove with cantilever beam 5 matches, the one end of inferior valve 2 is equipped with connecting terminal 4's draw-in groove.

Preferably, the connecting terminal 4 is connected to the lower case 2 in a plug-in manner, the inner end 41 of the connecting terminal 4 is electrically connected to the output side of the strain gauge 3, and the outer end of the connecting terminal 4 extends out of the lower case.

In the invention, in order to improve the sensitivity of the strain gauge, the structural form of an independent cantilever beam is designed, one end of the cantilever beam 5 is fixed, and the other end is suspended; particularly, the suspended end is provided with the hemispherical groove-shaped elastic body 51 and the gravity ball 6, when the object to be detected slightly vibrates, vibration information can be effectively sensed on the cantilever beam 5, and the whole cantilever beam generates micro deformation and is sensed by the strain gauge; the mass of the gravity ball is given according to the detection object and the sensitivity requirement.

The detection implementation process of the scheme of the embodiment is as follows:

1) collecting a micro-motion signal;

2) swinging the cantilever beam;

3) the strain gauge deforms to output different current signals;

4) the external end of the connecting terminal is connected with an AD converter, the AD converter outputs an amplified signal, the IC control chip integrates and processes the signal, the signal is in different specified frequency bands and analog waveform peak values and valley values through distinguishing the current signal, the signal is compared with data of a standard database, if the signal is matched with the standard database, the signal is a corresponding detection result, and the IC control chip outputs a detection result.

The micro-motion detection sensor of the embodiment adopts a mechanical physical mode, the strain gauge outputs a signal by current, data can be conveniently, stably and effectively acquired, and the design of the detection independent cantilever beam is not influenced by external force; the sensitivity is high. The whole sensor is highly integrated, the installation is rapid and convenient, the terminal type plug-in is connected with the main control component, and the terminal type plug-in is totally closed, dustproof and foreign matter-proof.

The micro-motion detection sensor can be applied to conveniently detect the inactive state of a human body, and continuously monitor vital signs and physiological indexes of the human body, including heart rate, respiratory rate and the like; the micro-motion sensor is arranged on a bed on which a detection object lies, so that whether a human body is in the bed (in the bed or out of the bed) or not can be judged when the human body sleeps; under the bed state, the sleeping human body vital signs, the turnover frequency number, the turnover body movement amplitude and the like can be detected, a standard database corresponding to various different conditions is established, and an IC control chip carries out data processing and detection according to signals detected by a sensor.

The embodiments described in this specification are merely illustrative of implementations of the inventive concepts, which are intended for purposes of illustration only. The scope of the present invention should not be construed as being limited to the particular forms set forth in the examples, but rather as being defined by the claims and the equivalents thereof which can occur to those skilled in the art upon consideration of the present inventive concept.