CN215492154U - Belt pressure sensor testing device - Google Patents

Abstract

The utility model discloses a belt type pressure sensor testing device, and relates to the technical field of pressure sensor testing. The pressure sensitive device is used for detecting pressure data of a detected object; the signal conditioning circuit is used for carrying out zero position and sensitivity adjustment on pressure data detected by the pressure sensitive device; the filter circuit is used for filtering the pressure data after the signal conditioning circuit is subjected to zero position and sensitivity adjustment; and the signal acquisition and transmission unit is used for converting the filtered pressure data into digital signals for output after temperature compensation and signal conditioning. The belt type pressure sensor adopts a mature encapsulating process and is integrally encapsulated, so that the belt type pressure sensor has excellent performances of water resistance, weather resistance, acid and alkali resistance and the like, the corresponding reliability and environmental adaptability of a product are ensured, the field installation requirement is considered, and the construction is facilitated; the construction process is efficient and rapid, simple and easy to implement, high in reliability and good in environmental adaptability.

Description

Belt pressure sensor testing device

Technical Field

The utility model belongs to the technical field of pressure sensor testing, and particularly relates to a belt type pressure sensor testing device.

Background

At present, the existing pressure sensor adopts a thread installation or screw installation mode, holes need to be drilled on the surface of a measured object during installation, the physical structure of the measured object is damaged, the pneumatic characteristic of a measured product is influenced, and the existing pressure sensor cannot meet the actual test requirement in the aspects of the size and the thickness of the product.

Through the above analysis, the problems and defects of the prior art are as follows:

in the prior art, the pressure sensor has poor reliability and environmental adaptability, and is inconvenient to install on site; the construction efficiency is low.

The significance of solving the problems and the defects is as follows:

the belt type pressure sensor is designed to be a flexible structure, can be arranged on the surface of a special-shaped structure in an adhesion mode, is smaller than 5mm in thickness, is smaller than 8mm in width, can be distributed on the surface of a measured object through a plurality of measuring points and a plurality of strips, and does not affect the structure and the pneumatic characteristic of the measured object.

SUMMERY OF THE UTILITY MODEL

In order to overcome the problems in the related art, the disclosed embodiment of the utility model provides a belt type pressure sensor testing device, which comprises the following technical schemes:

according to a first aspect of the disclosed embodiments of the present invention, there is provided a belt pressure sensor testing device, comprising:

the pressure sensitive device is directly contacted with the surface of the measured object through the pressure sensing hole and is used for detecting the pressure data of the measured object;

the signal conditioning circuit is connected with the pressure sensitive device and is used for adjusting the zero position and the sensitivity of pressure data detected by the pressure sensitive device;

the filter circuit is connected with the signal conditioning circuit and is used for filtering the pressure data after the zero position and the sensitivity of the signal conditioning circuit are adjusted;

and the signal acquisition and transmission unit is connected with the filter circuit and is used for converting the filtered pressure data into digital signals for output after temperature compensation and signal conditioning are carried out on the filtered pressure data.

In one embodiment of the utility model, the pressure sensitive device is formed by bonding a silicon microchip on the surface of a ceramic by adopting an MEMS (micro-electromechanical systems) processing technology, and the frequency response range is more than 1 KHz.

In an embodiment of the present invention, the signal conditioning circuit includes:

the RS485 interface is connected with the pressure sensitive device;

the RS485 interface transmits the detected pressure data of the pressure sensitive device to the buffer;

the buffer transmits the cached pressure data to the FPGA;

the FPGA transmits the pressure data after zero position and sensitivity adjustment to a memory for storage,

and meanwhile, the data is sent to the filter circuit through an RS422 interface.

In an embodiment of the utility model, the signal conditioning circuit further includes: and the input end of the power management module is connected with the filter circuit and is used for regulating and controlling the working power supplies of the buffer, the FPGA and the memory.

In an embodiment of the present invention, the signal acquisition and transmission unit includes:

a multiplexer for receiving the pressure data filtered by the filter circuit;

the multiplexer transmits the pressure data after temperature compensation adjustment to the ADC;

the ADC converts the pressure data and transmits the pressure data to the processor;

and the processor processes the converted pressure data and outputs the pressure data through a digital interface.

In an embodiment of the utility model, the belt type pressure sensor testing device adopts a plurality of testing points and a plurality of belts which are adhered to the surface of the special-shaped structure.

The technical scheme provided by the embodiment of the utility model has the following beneficial effects:

the belt-type pressure sensor testing device provided by the utility model comprises a pressure sensitive device, a signal conditioning circuit, a filter circuit, a signal acquisition and transmission unit and the like, wherein the pressure sensitive device is formed by bonding a silicon microchip on the surface of ceramic by adopting an MEMS (micro-electromechanical systems) processing technology, so that the whole pressure sensitive head is ensured to have good stability and high precision. The pressure sensitive device is directly contacted with the outside through the pressure sensing hole, the tube cavity effect is avoided, and the frequency response range is larger than 1 KHz.

The signal conditioning circuit, the filter circuit and the signal acquisition and transmission unit perform signal conditioning such as zero position, sensitivity adjustment, filtering, temperature compensation and the like on the output signal of the sensitive device and then convert the output signal into a digital signal for output.

The belt type pressure sensor adopts a mature encapsulating process and is integrally encapsulated and formed, and finally has excellent performances of water resistance, weather resistance, acid and alkali resistance and the like, so that the product has corresponding reliability and environmental adaptability, the field installation requirement is considered, and the construction is facilitated;

the belt type pressure sensor is installed on site by adopting an adhesive process, the main adhesive material is waterproof and weather-resistant structural adhesive, and the main construction process comprises cleaning, gluing, positioning, curing, cleaning and the like. The construction process is efficient and rapid, simple and easy to implement, high in reliability and good in environmental adaptability.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic diagram of a schematic circuit of a ribbon pressure sensor according to an embodiment of the present invention.

Fig. 2 is a schematic diagram of a signal conditioning circuit according to an embodiment of the present invention.

In fig. 1-2: 1. a pressure sensitive device; 2. a signal conditioning circuit; 3. a filter circuit; 4. and a signal acquisition and transmission unit.

Fig. 3 is a measured curve of the system for pressurizing the belt-type pressure sensor in water according to the embodiment of the present invention.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

As shown in fig. 1, the belt pressure sensor testing device provided in the embodiment of the disclosure of the present invention is composed of a pressure sensitive device 1, a signal conditioning circuit 2, a filter circuit 3, a signal acquisition and transmission unit 4, and the like.

The pressure sensitive device 1 is formed by bonding a silicon microchip on the surface of ceramic by adopting an MEMS (micro electro mechanical systems) processing technology, so that the whole pressure sensitive head has good stability and high precision. The pressure sensitive device is directly contacted with the outside through the pressure sensing hole, the tube cavity effect is avoided, and the frequency response range is larger than 1 KHz.

The signal conditioning circuit 2, the filter circuit 3 and the signal acquisition and transmission unit 4 perform signal conditioning such as zero position, sensitivity adjustment, filtering and temperature compensation on the output signal of the sensitive device and then convert the signal into a digital signal for output.

Fig. 2 is a schematic diagram of a signal conditioning circuit according to an embodiment of the present invention.

In particular, the amount of the solvent to be used,

the utility model provides a belt pressure sensor testing device, comprising:

the pressure sensitive device 1 is directly contacted with the surface of a measured object through the pressure sensing hole and is used for detecting pressure data of the measured object;

the signal conditioning circuit 2 is connected with the pressure sensitive device and is used for adjusting the zero position and the sensitivity of pressure data detected by the pressure sensitive device;

the filter circuit 3 is connected with the signal conditioning circuit and is used for filtering the pressure data after the zero position and the sensitivity of the signal conditioning circuit are adjusted;

and the signal acquisition and transmission unit 4 is connected with the filter circuit and is used for converting the filtered pressure data into digital signals for output after temperature compensation and signal conditioning are carried out on the filtered pressure data.

In a preferred embodiment of the present invention, the signal conditioning circuit includes:

the RS485 interface is connected with the pressure sensitive device;

the RS485 interface transmits the detected pressure data of the pressure sensitive device to the buffer;

the buffer transmits the cached pressure data to the FPGA;

the FPGA transmits the pressure data after zero position and sensitivity adjustment to a memory for storage,

and meanwhile, the data is sent to the filter circuit through an RS422 interface.

In a preferred embodiment of the present invention, the signal conditioning circuit further includes: and the input end of the power management module is connected with the filter circuit and is used for regulating and controlling the working power supplies of the buffer, the FPGA and the memory.

In a preferred embodiment of the present invention, the signal acquisition and transmission unit includes:

a multiplexer for receiving the pressure data filtered by the filter circuit;

the multiplexer transmits the pressure data after temperature compensation adjustment to the ADC;

the ADC converts the pressure data and transmits the pressure data to the processor;

and the processor processes the converted pressure data and outputs the pressure data through a digital interface.

In a preferred embodiment of the utility model, the belt type pressure sensor testing device adopts a plurality of testing points and a plurality of belts which are adhered to the surface of the special-shaped structure.

The manufacturing method of the belt type pressure sensor testing device comprises the following steps:

and the belt type pressure sensor testing device with strong reliability and environmental adaptability is obtained by adopting a potting process and integrally potting.

The signal processing principle of the belt type pressure sensor testing device comprises the following steps:

the signal conditioning circuit, the filter circuit and the signal acquisition and transmission unit perform signal conditioning such as zero position, sensitivity adjustment, filtering, temperature compensation and the like on the output signal of the sensitive device and then convert the output signal into a digital signal for output.

As shown in FIG. 3, the curve is the actual measurement curve of the system for pressurizing the belt type pressure sensor in water, the pressure in water is increased to 2MPa, the product output is normal, the comprehensive test precision is less than 0.5%, and the use requirement of the product under special conditions is completely met.

The technical effects of the present invention will be further described with reference to specific application examples.

Application example

The intelligent belt type pressure sensor testing device provided by the utility model is successfully applied to pressure tests of XX-X projects of the first space courtyard, XXX testing systems of the six space courtyards and 713, and test data are reliable and effective in test analysis of project pressure fields.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure should be limited only by the attached claims.

Claims (6)

1. A belt pressure sensor testing device, comprising:

the pressure sensitive device is directly contacted with the surface of the measured object through the pressure sensing hole and is used for detecting the pressure data of the measured object;

the signal conditioning circuit is connected with the pressure sensitive device and is used for adjusting the zero position and the sensitivity of pressure data detected by the pressure sensitive device;

the filter circuit is connected with the signal conditioning circuit and is used for filtering the pressure data after the zero position and the sensitivity of the signal conditioning circuit are adjusted;

and the signal acquisition and transmission unit is connected with the filter circuit and is used for converting the filtered pressure data into digital signals for output after temperature compensation and signal conditioning are carried out on the filtered pressure data.

2. The band pressure sensor test device of claim 1, wherein the pressure sensitive device is formed by bonding a silicon microchip to a ceramic surface using an MEMS process, and has a frequency response range greater than 1 KHz.

3. The band pressure sensor testing device of claim 1, wherein the signal conditioning circuit comprises:

the RS485 interface is connected with the pressure sensitive device;

the RS485 interface transmits the detected pressure data of the pressure sensitive device to the buffer;

the buffer transmits the cached pressure data to the FPGA;

the FPGA transmits the pressure data after zero position and sensitivity adjustment to a memory for storage,

and meanwhile, the data is sent to the filter circuit through an RS422 interface.

4. The band pressure sensor testing device of claim 1, wherein the signal conditioning circuit further comprises: and the input end of the power management module is connected with the filter circuit and is used for regulating and controlling the working power supplies of the buffer, the FPGA and the memory.

5. The band pressure sensor test device of claim 1, wherein the signal acquisition transmission unit comprises:

a multiplexer for receiving the pressure data filtered by the filter circuit;

the multiplexer transmits the pressure data after temperature compensation adjustment to the ADC;

the ADC converts the pressure data and transmits the pressure data to the processor;

and the processor processes the converted pressure data and outputs the pressure data through a digital interface.

6. The band pressure sensor test device of claim 1, wherein the band pressure sensor test device is bonded to the contoured structure surface using a plurality of test points, a plurality of strips.

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