CN220794502U - Miniature anti-theft device Water pressure sensor - Google Patents
Miniature anti-theft device Water pressure sensor Download PDFInfo
- Publication number
- CN220794502U CN220794502U CN202320086019.7U CN202320086019U CN220794502U CN 220794502 U CN220794502 U CN 220794502U CN 202320086019 U CN202320086019 U CN 202320086019U CN 220794502 U CN220794502 U CN 220794502U
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- sensor
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- compensation
- cable
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title abstract description 4
- 238000005259 measurement Methods 0.000 claims abstract description 6
- 229920006335 epoxy glue Polymers 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims 1
- 230000000694 effects Effects 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000000741 silica gel Substances 0.000 description 3
- 229910002027 silica gel Inorganic materials 0.000 description 3
- 239000003292 glue Substances 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Measuring Fluid Pressure (AREA)
Abstract
The utility model provides a miniature and (5) preventing the water pressure sensor. Comprising a sensor bodyThe sensor body comprises a sensor shell, a sensor core body is arranged in the sensor shell, one side of the sensor core body is connected with a sensor connector, a drainage hole communicated with the inside of the sensor shell is formed in the sensor connector, the other side of the sensor core body is connected with a PCB adapter plate arranged in the sensor shell, and the PCB adapter plate is connected with the cable; the compensation circuit comprises a bridge measurement circuit, and a sliding rheostat is connected into the bridge measurement circuit for zero compensation; heat-sensitive element and resistor R 0 After being connected in parallel, the temperature compensation is realized by connecting in series with a bridge measuring circuit; and a resistor RS is connected into the bridge measuring circuit, and the resistor RS and a resistor RAC in the measuring circuit form a series voltage dividing circuit to realize nonlinear compensation. The compensation circuit and the sensor body are arranged separately, so that the volume of the sensor body is reduced.
Description
Technical Field
The utility model relates to a miniature waterproof pressure sensor, and belongs to the technical field of sensors.
Background
A pressure sensor is a device or apparatus that converts a sensed pressure signal into a usable electrical signal according to a certain law. Pressure sensors are typically pressure sensitive the components and the signal processing unit are composed of, pressure sensors can be classified into gauge pressure sensors, differential pressure sensors, and absolute pressure sensors according to the type of pressure tested.
Pressure sensors are one of the most commonly used sensors, which are widely used in various environments. The existing pressure sensor has complex structure and huge volume, is inconvenient to arrange or has poor arrangement position for some devices with compact structures, and is easy to influence the normal operation of the sensor.
Disclosure of Invention
The utility model aims to provide a miniature waterproof pressure sensor which aims at the practical problems that the field space is small, the conventional pressure sensor cannot be installed, water is required to be prevented and the like, and has a simple structure.
The above object is achieved by the following technical scheme:
the miniature waterproof pressure sensor comprises a sensor body and a compensation circuit connected with the sensor body through a cable, wherein the sensor body comprises a sensor shell, a sensor core is arranged in the sensor shell, one side of the sensor core is connected with a sensor connector, a drainage hole communicated with the inside of the sensor shell is formed in the sensor connector, the other side of the sensor core is connected with a PCB adapter plate arranged in the sensor shell, and the PCB adapter plate is connected with the cable; the compensation circuit comprises a bridge measurement circuit, and a sliding rheostat is connected into the bridge measurement circuit for zero compensation; heat-sensitive element and resistor R 0 After being connected in parallel, the temperature compensation is realized by connecting in series with a bridge measuring circuit; and a resistor RS is connected into the bridge measuring circuit, and the resistor RS and a resistor RAC in the measuring circuit form a series voltage dividing circuit to realize nonlinear compensation.
Further, the method comprises the steps of, the cable adopts five-core shielding cable.
Further, the sensor core body is encapsulated in the cavity of the sensor connector by epoxy glue, signals of the sensor core body are led to the PCB adapter plate by gold wires, and the cable is welded to the PCB adapter plate.
Further, the PCB adapter plate is plugged into the sensor connector and is coated with silica gel for waterproof protection.
Further, the joint of the sensor joint and the sensor housing is welded by laser.
Further, the drainage is Kong Waijing phi 1.2mm.
Further, the outer diameter phi of the sensor housing is 5mm, and the overall structural shape phi of the sensor body is 5 multiplied by 15mm.
Further, the sensor cable outer diameter phi 1.0mm.
Advantageous effects
1. The compensation circuit and the sensor body are arranged separately, so that the volume of the sensor body is reduced, the sensor body can have an overall structure with the outline phi of 5 multiplied by 15mm, the sensor is very beneficial to space-limited installation occasions, and the sensor body is fixed on equipment only by glue.
2. The utility model relates to a silica gel encapsulated sensor shell, the sensor can be guaranteed to be waterproof.
3. The sensor connector and the sensor shell are welded together by laser, so that the reliability of the sensor can be ensured.
Drawings
FIG. 1 is a schematic perspective view of the present utility model;
FIG. 2 is a cross-sectional view of the present utility model;
FIG. 3 is a sensor zero compensation circuit;
FIG. 4 is a sensor temperature compensation circuit;
FIG. 5 is a sensor nonlinear compensation circuit;
FIG. 6 is a graph of sensor nonlinearity compensation;
in the figure: 1. a sensor joint; 2. a sensor core; 3. a PCB adapter plate; 4. a sensor housing; 5. a five-core shielded cable; 6. a compensation circuit; 7. and a drainage hole.
Detailed Description
As shown in fig. 1-6: the miniature waterproof pressure sensor comprises a sensor body and a compensation circuit 6 connected with the sensor body through a cable 5, wherein the sensor body comprises a sensor shell 4, a sensor core 2 is arranged in the sensor shell, one side of the sensor core is connected with a sensor connector 1, a drainage hole 7 communicated with the inside of the sensor shell is formed in the sensor connector 1, a PCB adapter plate 3 arranged in the inside of the sensor shell is connected with the other side of the sensor core, and the PCB adapter plate is connected with the sensorThe cable; the compensation circuit comprises a resistor R 1 、R 2 、R 3 、R 4 The sliding rheostat R is connected into the bridge measuring circuit Z Zero compensation is carried out, and the principle is that the resistance value of a sliding resistor is regulated to enable the output voltage of a sensor to be approximately zero, and then a patch precise resistor is used for replacing the resistance value of the sliding resistor to be connected into a measuring circuit in series to achieve the zero compensation effect; will be a thermosensitive element R T And resistance R 0 The principle of the parallel connection and the serial connection are connected into a bridge measuring circuit to realize temperature compensation is that the characteristic that the temperature coefficient of a thermosensitive element is large is utilized, and the thermosensitive element and a resistor R 0 The parallel connection is connected in series into a measuring circuit, and the resistance value of the parallel resistor is regulated according to the output of the sensor at the limit working temperature, so that the temperature compensation effect of the sensor is achieved; the bridge measuring circuit is connected with resistors RS, RS and a series voltage dividing circuit formed by a resistor RAC in the measuring circuit to realize nonlinear compensation, and the principle is that if the power supply voltage U is Input device When it is constant, the actual supply voltage U in the circuit is measured AC Also increases during pressure loading, and the output voltage U 0 output And U AC Proportional to the ratio. The greater the pressure, the greater the slope of the output characteristic, resulting in non-linearities as shown in fig. 6. If the compensating nonlinearity is opposite to the direction, the absolute value is equal, and the compensating effect can be achieved.
Further, the cable adopts a five-core shielding cable. The sensor is characterized in that the sensor core body 2 is encapsulated in a cavity of the sensor connector by epoxy glue, signals of the sensor core body 2 are led to the PCB adapter plate 3 by gold wires, a cable 5 penetrates into the sensor shell 4, the cable is welded 5 to the PCB adapter plate 3, the PCB adapter plate 3 is plugged into the sensor connector 1, waterproof protection is carried out by coating silica gel, and the joint of the sensor connector 1 and the sensor shell is welded by laser. Further, the drainage is Kong Waijing phi 1.2mm.
Further, the outer diameter phi of the sensor housing is 5mm, and the overall structural shape phi of the sensor body is 5 multiplied by 15mm.
Further, the sensor cable outer diameter phi 1.0mm.
The working process comprises the following steps:
the sensor body is fixed on equipment through glue, and when the downthehole injection pressure of drainage, the pressure sensing element on the sensor core passes through the circuit with the pressure that will feel and changes voltage signal, realizes pressure test, the sensor core in this embodiment adopts the core of the pressure sensor that commonly uses in the prior art.
The technical means disclosed by the scheme of the utility model is not limited to the technical means disclosed by the technical means, and also comprises the technical scheme consisting of the technical characteristics and the equivalent substitution. The present utility model is not limited to the prior art.
Claims (8)
1. The miniature waterproof pressure sensor is characterized by comprising a sensor body and a compensation circuit connected with the sensor body through a cable, wherein the sensor body comprises a sensor shell, a sensor core is arranged in the sensor shell, one side of the sensor core is connected with a sensor connector, a drainage hole communicated with the inside of the sensor shell is formed in the sensor connector, the other side of the sensor core is connected with a PCB adapter plate arranged in the sensor shell, and the PCB adapter plate is connected with the cable; the compensation circuit comprises a bridge measurement circuit, and a sliding rheostat is connected into the bridge measurement circuit for zero compensation; heat-sensitive element and resistor R 0 After being connected in parallel, the temperature compensation is realized by connecting in series with a bridge measuring circuit; and a resistor RS is connected into the bridge measuring circuit, and the resistor RS and a resistor RAC in the measuring circuit form a series voltage dividing circuit to realize nonlinear compensation.
2. The miniature waterproof pressure sensor of claim 1, wherein said cable is a five-core shielded cable.
3. The miniature waterproof pressure sensor of claim 1, wherein the sensor core is encapsulated by epoxy glue in the cavity of the sensor connector, the signal of the sensor core is led to the PCB adapter plate by a gold wire, and the cable is soldered to the PCB adapter plate.
4. The miniature waterproof pressure sensor of claim 1, wherein the PCB adapter plate is plugged into the sensor connector and is waterproof protected by being coated with silicone.
5. The miniature waterproof pressure sensor of claim 1, wherein said sensor fitting is laser welded to said sensor housing.
6. The miniature waterproof pressure sensor of claim 1, wherein said drainage Kong Waijing phi 1.2mm.
7. The miniature waterproof pressure sensor of claim 1, wherein the outer diameter of the sensor housing is 5mm, and the overall structural shape of the sensor body is 5 x 15mm.
8. The miniature waterproof pressure sensor of claim 1, wherein the sensor cable has an outer diameter Φ1.0mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320086019.7U CN220794502U (en) | 2023-01-30 | 2023-01-30 | Miniature anti-theft device Water pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320086019.7U CN220794502U (en) | 2023-01-30 | 2023-01-30 | Miniature anti-theft device Water pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220794502U true CN220794502U (en) | 2024-04-16 |
Family
ID=90653749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320086019.7U Active CN220794502U (en) | 2023-01-30 | 2023-01-30 | Miniature anti-theft device Water pressure sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220794502U (en) |
-
2023
- 2023-01-30 CN CN202320086019.7U patent/CN220794502U/en active Active
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