CN205300819U - Pressure detection circuit - Google Patents
Pressure detection circuit Download PDFInfo
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- CN205300819U CN205300819U CN201620014460.4U CN201620014460U CN205300819U CN 205300819 U CN205300819 U CN 205300819U CN 201620014460 U CN201620014460 U CN 201620014460U CN 205300819 U CN205300819 U CN 205300819U
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- signal processing
- pressure
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Abstract
The utility model discloses a pressure detection circuit, including pressure sensing module, signal processing module, display module and power module, power module gives pressure sensing module, signal processing module, display module power supply respectively, and pressure sensing module's output is connected with signal processing module's input, and signal processing module's output is connected with the input of display module, pressure sensing module includes pressure sensing bridge circuit and amplifier circuit, signal processing module includes the singlechip, gathers the analog signal of pressure sensing module output, after handling analog signal transmits it to the display module. The utility model discloses simple structure, low cost can satisfy the requirement of pressure sensor in sensitivity and accuracy nature simultaneously effectively.
Description
Technical field
The utility model discloses a kind of pressure detection circuit, relate to electric and electronic technical field.
Background technology
Pressure transducer is a kind of sensor that in industry and daily life, purposes is wider, can be widely applied to various industry automatic control environment, for instance numerous industries such as intelligent transportation, intelligent building, Aero-Space, petrochemical industry, oil well, electric power, boats and ships, commercial production, medical science.
Pressure transducer is applied also wide in daily life, and wherein strain gauge resistance pressure transducer is mainly used in and carries out pressure measxurement and the aspect such as weigh. It is converted to strain or displacement by elastic sensing element power or pressure, is then converted strain or displacement to the signal of telecommunication by sensor again.
Resistance strain gage is a kind of Sensitive Apparatus that strain variation on measured piece is converted into a kind of signal of telecommunication. Generally being bonded in closely on generation mechanics strain elastic sensing element matrix by special bonding agent by foil gauge, when elastic sensitive stress generation STRESS VARIATION, resistance strain gage also produces deformation together, and its resistance changes. For improving output sensitivity, generally resistance strain gage is formed bridge circuit, output voltage signal, after being amplified by instrument amplifier, is transferred to signal processing circuit, be ultimately passed to display or actuator.
The most structure of pressure detection circuit of the prior art is complicated, need to improve in sensitivity and degree of accuracy simultaneously.
Utility model content
Technical problem to be solved in the utility model is: for the defect of prior art, it is provided that a kind of pressure detection circuit.
This utility model is for solving above-mentioned technical problem by the following technical solutions:
A kind of pressure detection circuit, including pressure sensor block, signal processing module, display module and power module, described power module powers to respectively pressure sensor block, signal processing module, display module, the outfan of pressure sensor block is connected with the input of signal processing module, the outfan of signal processing module is connected with the input of display module, wherein, described pressure sensor block includes pressure sensing bridge circuit and amplifying circuit; Described signal processing module includes single-chip microcomputer, gathers the analogue signal of pressure sensor block output, transmits it to display module after analogue signal is processed.
As of the present utility model it is preferred that scheme, described pressure sensing bridge circuit adopts overarm arm bridge-type resistance strain gage pressure transducer, and the resistance strain gage on overarm arm forms bridge circuit;
Described amplifying circuit adopts the instrument amplification chip of 8 pin industry-standard configuration, and the power end of amplification chip and earth terminal connect power supply and ground respectively, and reference edge passes through external potentiometer and reference voltage, regulates and improves output voltage;
The in-phase input end of amplification chip accesses the anode of overarm arm bridge-type resistance strain gage pressure transducer, the anti-phase negative terminal accessing overarm arm bridge-type resistance strain gage pressure transducer of amplification chip.
As of the present utility model it is preferred that scheme, the concrete model of described single-chip microcomputer is C8051F360.
It is preferred that scheme, described display module is liquid crystal display as of the present utility model, and concrete model is LCD12864.
This utility model adopts above technical scheme compared with prior art, has following technical effect that this utility model simple in construction, with low cost, can effectively meet pressure transducer requirement in susceptiveness and accuracy simultaneously.
Accompanying drawing explanation
Fig. 1 is construction module schematic diagram of the present utility model.
Detailed description of the invention
Being described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of same or like function from start to finish. The embodiment described below with reference to accompanying drawing is illustrative of, and is only used for explaining this utility model, and can not be construed to restriction of the present utility model.
Below in conjunction with accompanying drawing, the technical solution of the utility model is described in further detail:
Construction module schematic diagram of the present utility model is as shown in Figure 1, described pressure detection circuit, including pressure sensor block, signal processing module, display module and power module, described power module powers to respectively pressure sensor block, signal processing module, display module, the outfan of pressure sensor block is connected with the input of signal processing module, the outfan of signal processing module is connected with the input of display module, wherein, described pressure sensor block includes pressure sensing bridge circuit and amplifying circuit; Described signal processing module includes single-chip microcomputer, gathers the analogue signal of pressure sensor block output, transmits it to display module after analogue signal is processed.
The concrete condition of each module of the present invention is described below in conjunction with specific embodiment:
Pressure sensor block: pressure sensing bridge circuit adopts overarm arm bridge-type resistance strain gage pressure transducer, resistance strain gage composition bridge circuit on overarm arm, metal platform is for placing weighting objects region, input voltage connects 5V supply voltage, the exportable voltage signal of sensing circuit, it is necessary to be amplified processing through amplifying circuit.
Amplifying circuit adopts the instrument amplification chip of 8 pin industry-standard configuration, and single supply is powered, and single gain setting resistor can be used to carry out gain programming, is provided that fabulous alternating CMRR and keeps minimum error; When up to 200HZ, circuit noise and harmonic wave still keep constant.
When circuit connects, the power end of amplification chip and earth terminal connect power supply and ground respectively, and reference edge passes through external potentiometer and reference voltage, regulates and improves output voltage. Between pin 1 and pin 8, series resistance and potentiometer regulate amplification.The in-phase input end of amplification chip accesses the anode of bridge pressure sensor, the negative terminal of the anti-phase access input bridge pressure sensor of amplification chip, amplifier output termination signal processing module.
Signal processing module: signal processing module adopts C8051F360 single-chip microcomputer, and it has been internally integrated I2C and multiple common I/O mouth and 10 A/D converters of multichannel, in order to gather the analogue signal of pressure simulation sensor output. C8051F360 will send chinese liquid crystal display device (LCD12864) to show after the signal processing collected, the zero point simultaneously measured by pressure transducer and the slope calculated store in FLASH therein.
The power pins of signal processing chip C8051F360 connects 3.3V, VSS end ground connection.
Pressure simulation sensor delivery outlet is connected with 38 foot P1.5 of C8051F360 single-chip microcomputer, in order to gather pressure simulation signal. The 21 foot P3.4 and 22 foot P3.3 of C8051F360 single-chip microcomputer are connected with the 5 foot LCD_SID and 6 foot LCD_SCLK of LCD12864 respectively, in order to drive display to show processed signal.
Display module: this module is that liquid crystal display screen is connected with signal processing module, is used for showing data and other operation prompt information that sensor acquisition arrives. LCD12864 is operated in serial mode, uses pin 5 to simulate I2C with 6 and communicates and carry out data transmission.
Power module: 12V power supply is communicated to the input of voltage conversion chip LM2576, is output as 5V voltage after conversion, whether LED is used for indicating 5V voltage normal. 5V output voltage, then through the input of voltage conversion chip AMS1117, exports 3.3V voltage.
Above in conjunction with accompanying drawing, embodiment of the present utility model is explained in detail, but this utility model is not limited to above-mentioned embodiment, in the ken that those of ordinary skill in the art possess, it is also possible to make a variety of changes under the premise without departing from this utility model objective. the above, it it is only preferred embodiment of the present utility model, not this utility model is done any pro forma restriction, although this utility model is disclosed above with preferred embodiment, but it is not limited to this utility model, any those skilled in the art, without departing within the scope of technical solutions of the utility model, when the technology contents of available the disclosure above makes a little change or is modified to the Equivalent embodiments of equivalent variations, in every case it is without departing from technical solutions of the utility model content, according to technical spirit of the present utility model, within spirit of the present utility model and principle, the any simple amendment that above example is made, equivalent replacement and improvement etc., all still fall within the protection domain of technical solutions of the utility model.
Claims (4)
1. a pressure detection circuit, it is characterized in that: include pressure sensor block, signal processing module, display module and power module, described power module powers to respectively pressure sensor block, signal processing module, display module, the outfan of pressure sensor block is connected with the input of signal processing module, the outfan of signal processing module is connected with the input of display module, wherein
Described pressure sensor block includes pressure sensing bridge circuit and amplifying circuit;
Described signal processing module includes single-chip microcomputer, gathers the analogue signal of pressure sensor block output, transmits it to display module after analogue signal is processed.
2. a kind of pressure detection circuit as claimed in claim 1, it is characterised in that: described pressure sensing bridge circuit adopts overarm arm bridge-type resistance strain gage pressure transducer, the resistance strain gage composition bridge circuit on overarm arm;
Described amplifying circuit adopts the instrument amplification chip of 8 pin industry-standard configuration, and the power end of amplification chip and earth terminal connect power supply and ground respectively, and reference edge passes through external potentiometer and reference voltage, regulates and improves output voltage;
The in-phase input end of amplification chip accesses the anode of overarm arm bridge-type resistance strain gage pressure transducer, the anti-phase negative terminal accessing overarm arm bridge-type resistance strain gage pressure transducer of amplification chip.
3. a kind of pressure detection circuit as claimed in claim 1, it is characterised in that: the concrete model of described single-chip microcomputer is C8051F360.
4. a kind of pressure detection circuit as claimed in claim 1, it is characterised in that: described display module is liquid crystal display, and concrete model is LCD12864.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620014460.4U CN205300819U (en) | 2016-01-08 | 2016-01-08 | Pressure detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620014460.4U CN205300819U (en) | 2016-01-08 | 2016-01-08 | Pressure detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205300819U true CN205300819U (en) | 2016-06-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620014460.4U Expired - Fee Related CN205300819U (en) | 2016-01-08 | 2016-01-08 | Pressure detection circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN205300819U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106768531A (en) * | 2017-03-29 | 2017-05-31 | 无锡永阳电子科技有限公司 | A kind of simple pressure sensor test system |
-
2016
- 2016-01-08 CN CN201620014460.4U patent/CN205300819U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106768531A (en) * | 2017-03-29 | 2017-05-31 | 无锡永阳电子科技有限公司 | A kind of simple pressure sensor test system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160608 Termination date: 20190108 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |