CN204422130U - A kind of gas pressure detection meter - Google Patents
A kind of gas pressure detection meter Download PDFInfo
- Publication number
- CN204422130U CN204422130U CN201520150983.7U CN201520150983U CN204422130U CN 204422130 U CN204422130 U CN 204422130U CN 201520150983 U CN201520150983 U CN 201520150983U CN 204422130 U CN204422130 U CN 204422130U
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- operational amplifier
- gas pressure
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Abstract
The utility model discloses a kind of gas pressure detection meter, comprise signal acquisition circuit, governor circuit, A/D change-over circuit, liquid crystal display circuit; Signal acquisition circuit is connected in series with A/D change-over circuit, governor circuit is connected with A/D change-over circuit, liquid crystal display circuit respectively; Signal acquisition circuit is primarily of baroceptor and dual operational amplifier composition, and baroceptor perception gas to be measured produces voltage signal, and voltage signal amplifies through dual operational amplifier, and the voltage signal after amplification sends into A/D change-over circuit; Input signal is converted to digital signal and sends into governor circuit by A/D change-over circuit, and governor circuit processes digital signal, and send the result after process to liquid crystal display circuit, measurement result shows by liquid crystal display circuit over the display.Measuring accuracy of the present utility model is higher, and range is comparatively large, and cost is low.
Description
Technical field
The utility model belongs to smart electronics instrument field, is specifically related to a kind of gas pressure detection meter.
Background technology
On market, gas pressure detection meter is of a great variety, but the measuring accuracy of majority of gas pressure detection meter, the contradiction between scope and price are solved well, the price that measurement range is wide, precision is high is also higher, therefore needs to seek that a kind of measurement range is comparatively wide, precision is higher and lower-cost gas pressure detection meter.
Utility model content
In order to solve above-mentioned technical matters, the utility model provides that a kind of measurement range is comparatively wide, precision is higher and lower-cost gas pressure detection meter.
The technical scheme that the utility model adopts is: a kind of gas pressure detection meter, is characterized in that: comprise signal acquisition circuit, governor circuit, A/D change-over circuit, liquid crystal display circuit; Described signal acquisition circuit is connected in series with A/D change-over circuit, described governor circuit is connected with described A/D change-over circuit, liquid crystal display circuit respectively; Described signal acquisition circuit is primarily of baroceptor and dual operational amplifier composition, and baroceptor perception gas to be measured produces voltage signal, and voltage signal amplifies through dual operational amplifier, and the voltage signal after amplification sends into A/D change-over circuit; Input signal is converted to the governor circuit described in digital signal feeding by described A/D change-over circuit, described governor circuit processes digital signal, send the result after process to described liquid crystal display circuit, measurement result shows by described liquid crystal display circuit over the display.
As preferably, described gas pressure detection meter also comprises reset circuit, is connected, for circuit reset with described governor circuit.
As preferably, described gas pressure detection meter also comprises crystal oscillating circuit, is connected with described governor circuit, for described gas pressure detection meter provides basic clock signal.
As preferably, described signal acquisition circuit is made up of baroceptor PS4-102G and dual operational amplifier LM358, and the pin 1 of baroceptor PS4-102G connects 12V voltage; Pin 3,4 ground connection of sensor; The pin 2 of baroceptor PS4-102G is connected on the pin 2 of dual operational amplifier LM358 by resistance R2; Pin 3,4 ground connection of dual operational amplifier LM358; The pin 8 of dual operational amplifier LM358 meets VCC; The pin 1,2 of dual operational amplifier LM358 is connected by resistance R5; The pin 1 of dual operational amplifier LM358 is connected on pin 6 by resistance R3; Pin 5 ground connection of dual operational amplifier LM358; The pin 6,7 of dual operational amplifier LM358 is connected by resistance R6; The pin 7 of dual operational amplifier LM358 is by slide rheostat RV2 ground connection; The pin 7 of dual operational amplifier LM358 is by resistance R7 and R8 ground connection; No. 3 of slide rheostat RV2 terminate on the pin 26 of the acp chip ADC0809 in described A/D change-over circuit; The pin 12 of chip ADC0809 is by resistance R8 ground connection.
As preferably, described governor circuit coordinates the core circuit that each circuit normally works, and its core devices is single-chip microcomputer TC12C5A32S2; The pin 1,2,3,4,5,6,7,8,9 of single-chip microcomputer TC12C5A32S2 stamps network label D0, D1, D2, D3, D4, D5, D6, D7, RST respectively; Pin 18,19 stamps network label X2, X1 respectively; Pin 20 ground connection; Pin 21,22,23,24,25,26,27 stamps network label P20, P21, P22, CLK, ST, OE, EOC respectively; Pin 31 meets VCC by resistance R4; Pin 32,33,34,35,36,37,38,39 stamps network label D7, D6, D5, D4, D3, D2, D1, D0 respectively; Pin 40 meets VCC; A termination VCC after electric capacity C1 and electrochemical capacitor C2 parallel connection, other end ground connection.
As preferably, described A/D change-over circuit converts digital signal to input signal to be measured, and its core devices is chip ADC0809; The equal ground connection of pin 5,4,3,2,1,28,27,16,23,24,25 of chip ADC0809; Pin 17,14,15,8,18,19,20,21 stamps network label D0, D1, D2, D3, D4, D5, D6, D7 respectively; Pin 7,9,6,10 stamps network label EOC, OE, ST, CLK respectively.
As preferably, the core devices of described liquid crystal display circuit is LCDs LCD1602, pin 1 ground connection of LCDs LCD1602; Pin 2 meets VCC; Pin 3 is connected on one end of slide rheostat RV1; Other two ends ground connection and the VCC respectively of slide rheostat RV1; Pin 4,5,6 stamps network label P20, P21, P22 respectively; Pin 7,8,9,10,11,12,13,14 stamps network label D0, D1, D2, D3, D4, D5, D6, D7 respectively; Pin 15 meets VCC; Pin 16 ground connection; Pin 1 ground connection of connector RP1; 2,3,4,5,6,7,8,9 of connector RP1 stamps network label D0, D1, D2, D3, D4, D5, D6, D7 respectively.
As preferably, the core devices of described reset circuit is 10uF/35V electrolytic condenser; The positive pole of electrolytic condenser C3 meets VCC; The negative pole of electrolytic condenser C3 is by resistance R10 ground connection; Button SW-PB is connected in parallel on the two ends of electrolytic condenser; The negative pole of electrolytic condenser stamps network label RST.
As preferably, the core devices of described crystal oscillating circuit is crystal oscillator G1; The two ends of crystal oscillator G1 stamp network label X1, X2 respectively; One end of crystal oscillator G1 is by electric capacity C4 ground connection, and the other end is by electric capacity C5 ground connection.
The utility model utilizes single-chip microcomputer to complete the measurement of gas pressure value.The pressure of baroceptor PS4-102G to gas detects, subsequently, signal acquisition circuit converts gaseous tension signal to corresponding voltage signal, voltage signal is converted into digital signal through A/D analog to digital converter, digital quantity after conversion draws corresponding measurement numerical value after single-chip microcomputer STC12C5A32S2 process, and measurement numerical value shows by LCD display circuit intuitively.Measuring accuracy of the present utility model is higher, and range is comparatively large, and cost is low.
Accompanying drawing explanation
Fig. 1: the circuit theory diagrams of the utility model embodiment;
Fig. 2: the signal acquisition circuit of the utility model embodiment, A/D change-over circuit, governor circuit and the circuit diagram of liquid crystal display circuit;
Fig. 3: the circuit diagram of the reset circuit of the utility model embodiment;
Fig. 4: the circuit diagram of the crystal oscillating circuit of the utility model embodiment.
Embodiment
Understand for the ease of those of ordinary skill in the art and implement the utility model, below in conjunction with drawings and Examples, the utility model is described in further detail, should be appreciated that exemplifying embodiment described herein is only for instruction and explanation of the utility model, and be not used in restriction the utility model.
Ask for an interview Fig. 1, a kind of gas pressure detection meter that the utility model provides, comprise signal acquisition circuit, governor circuit, A/D change-over circuit, liquid crystal display circuit, reset circuit and crystal oscillating circuit; Reset circuit is used for circuit reset; Crystal oscillating circuit provides basic clock signal for gas pressure detection meter; Signal acquisition circuit is connected in series with A/D change-over circuit, governor circuit is connected with A/D change-over circuit, liquid crystal display circuit, reset circuit and crystal oscillating circuit respectively; Signal acquisition circuit is primarily of baroceptor and dual operational amplifier composition, and baroceptor perception gas to be measured produces voltage signal, and voltage signal amplifies through dual operational amplifier, and the voltage signal after amplification sends into A/D change-over circuit; Input signal is converted to digital signal and sends into governor circuit by A/D change-over circuit, and governor circuit processes digital signal, and send the result after process to liquid crystal display circuit, measurement result shows by liquid crystal display circuit over the display.
Ask for an interview Fig. 2, the signal acquisition circuit Main Function of the present embodiment gaseous tension signal is converted to corresponding voltage signal, and be made up of baroceptor PS4-102G and dual operational amplifier LM358, the pin 1 of baroceptor PS4-102G connects 12V voltage; Pin 3,4 ground connection of sensor; The pin 2 of baroceptor PS4-102G is connected on the pin 2 of dual operational amplifier LM358 by resistance R2; Pin 3,4 ground connection of dual operational amplifier LM358; The pin 8 of dual operational amplifier LM358 meets VCC; The pin 1,2 of dual operational amplifier LM358 is connected by resistance R5; The pin 1 of dual operational amplifier LM358 is connected on pin 6 by resistance R3; Pin 5 ground connection of dual operational amplifier LM358; The pin 6,7 of dual operational amplifier LM358 is connected by resistance R6; The pin 7 of dual operational amplifier LM358 is by slide rheostat RV2 ground connection; The pin 7 of dual operational amplifier LM358 is by resistance R7 and R8 ground connection; No. 3 of slide rheostat RV2 terminate on the pin 26 of the acp chip ADC0809 in A/D change-over circuit; The pin 12 of chip ADC0809 is by resistance R8 ground connection.
Ask for an interview Fig. 2, the A/D change-over circuit of the present embodiment converts digital signal to input signal, and its core devices is chip ADC0809; The equal ground connection of pin 5,4,3,2,1,28,27,16,23,24,25 of chip ADC0809; Pin 17,14,15,8,18,19,20,21 stamps network label D0, D1, D2, D3, D4, D5, D6, D7 respectively; Pin 7,9,6,10 stamps network label EOC, OE, ST, CLK respectively.
Ask for an interview Fig. 2, the governor circuit of the present embodiment is the core circuit that each circuit of coordination normally works, and its core devices is single-chip microcomputer TC12C5A32S2; The pin 1,2,3,4,5,6,7,8,9 of single-chip microcomputer TC12C5A32S2 stamps network label D0, D1, D2, D3, D4, D5, D6, D7, RST respectively; Pin 18,19 stamps network label X2, X1 respectively; Pin 20 ground connection; Pin 21,22,23,24,25,26,27 stamps network label P20, P21, P22, CLK, ST, OE, EOC respectively; Pin 31 meets VCC by resistance R4; Pin 32,33,34,35,36,37,38,39 stamps network label D7, D6, D5, D4, D3, D2, D1, D0 respectively; Pin 40 meets VCC; A termination VCC after electric capacity C1 and electrochemical capacitor C2 parallel connection, other end ground connection.
Ask for an interview Fig. 2, the core devices of the liquid crystal display circuit of the present embodiment is LCDs LCD1602, pin 1 ground connection of LCDs LCD1602; Pin 2 meets VCC; Pin 3 is connected on one end of slide rheostat RV1; Other two ends ground connection and the VCC respectively of slide rheostat RV1; Pin 4,5,6 stamps network label P20, P21, P22 respectively; Pin 7,8,9,10,11,12,13,14 stamps network label D0, D1, D2, D3, D4, D5, D6, D7 respectively; Pin 15 meets VCC; Pin 16 ground connection; Pin 1 ground connection of connector RP1; 2,3,4,5,6,7,8,9 of connector RP1 stamps network label D0, D1, D2, D3, D4, D5, D6, D7 respectively.Display is output block important in the utility model, for intuitive measurement results fed back to gauger, is the necessary links of man-machine interaction.
Ask for an interview Fig. 3, the core devices of the reset circuit of the present embodiment is 10uF/35V electrolytic condenser; The positive pole of electrolytic condenser C3 meets VCC; The negative pole of electrolytic condenser C3 is by resistance R10 ground connection; Button SW-PB is connected in parallel on the two ends of electrolytic condenser; The negative pole of electrolytic condenser stamps network label RST.
Ask for an interview Fig. 4, the core devices of the crystal oscillating circuit of the present embodiment is crystal oscillator G1; The two ends of crystal oscillator G1 stamp network label X1, X2 respectively; One end of crystal oscillator G1 is by electric capacity C4 ground connection, and the other end is by electric capacity C5 ground connection.
This gas pressure detection meter operationally accesses gas to be measured, to various piece module for power supply, is run by key control circuit, can read concrete air pressure numerical value after operation in LCDs.
Should be understood that, the part that this instructions does not elaborate all belongs to prior art.
Should be understood that; the above-mentioned description for preferred embodiment is comparatively detailed; therefore the restriction to the utility model scope of patent protection can not be thought; those of ordinary skill in the art is under enlightenment of the present utility model; do not departing under the ambit that the utility model claim protects; can also make and replacing or distortion, all fall within protection domain of the present utility model, request protection domain of the present utility model should be as the criterion with claims.
Claims (9)
1. a gas pressure detection meter, is characterized in that: comprise signal acquisition circuit, governor circuit, A/D change-over circuit, liquid crystal display circuit; Described signal acquisition circuit is connected in series with A/D change-over circuit, described governor circuit is connected with described A/D change-over circuit, liquid crystal display circuit respectively; Described signal acquisition circuit is primarily of baroceptor and dual operational amplifier composition, and baroceptor perception gas to be measured produces voltage signal, and voltage signal amplifies through dual operational amplifier, and the voltage signal after amplification sends into A/D change-over circuit; Input signal is converted to the governor circuit described in digital signal feeding by described A/D change-over circuit, described governor circuit processes digital signal, send the result after process to described liquid crystal display circuit, measurement result shows by described liquid crystal display circuit over the display.
2. gas pressure detection meter according to claim 1, is characterized in that: described gas pressure detection meter also comprises reset circuit, is connected, for circuit reset with described governor circuit.
3. gas pressure detection meter according to claim 1, is characterized in that: described gas pressure detection meter also comprises crystal oscillating circuit, is connected with described governor circuit, for described gas pressure detection meter provides basic clock signal.
4. gas pressure detection meter according to claim 1, is characterized in that: described signal acquisition circuit is made up of baroceptor PS4-102G and dual operational amplifier LM358, and the pin 1 of baroceptor PS4-102G connects 12V voltage; Pin 3,4 ground connection of sensor; The pin 2 of baroceptor PS4-102G is connected on the pin 2 of dual operational amplifier LM358 by resistance R2; Pin 3,4 ground connection of dual operational amplifier LM358; The pin 8 of dual operational amplifier LM358 meets VCC; The pin 1,2 of dual operational amplifier LM358 is connected by resistance R5; The pin 1 of dual operational amplifier LM358 is connected on pin 6 by resistance R3; Pin 5 ground connection of dual operational amplifier LM358; The pin 6,7 of dual operational amplifier LM358 is connected by resistance R6; The pin 7 of dual operational amplifier LM358 is by slide rheostat RV2 ground connection; The pin 7 of dual operational amplifier LM358 is by resistance R7 and R8 ground connection; No. 3 of slide rheostat RV2 terminate on the pin 26 of the acp chip ADC0809 in described A/D change-over circuit; The pin 12 of chip ADC0809 is by resistance R8 ground connection.
5. gas pressure detection meter according to claim 1, is characterized in that: described governor circuit is the core circuit that each circuit of coordination normally works, and its core devices is single-chip microcomputer TC12C5A32S2; The pin 1,2,3,4,5,6,7,8,9 of single-chip microcomputer TC12C5A32S2 stamps network label D0, D1, D2, D3, D4, D5, D6, D7, RST respectively; Pin 18,19 stamps network label X2, X1 respectively; Pin 20 ground connection; Pin 21,22,23,24,25,26,27 stamps network label P20, P21, P22, CLK, ST, OE, EOC respectively; Pin 31 meets VCC by resistance R4; Pin 32,33,34,35,36,37,38,39 stamps network label D7, D6, D5, D4, D3, D2, D1, D0 respectively; Pin 40 meets VCC; A termination VCC after electric capacity C1 and electrochemical capacitor C2 parallel connection, other end ground connection.
6. gas pressure detection meter according to claim 1, is characterized in that: described A/D change-over circuit converts digital signal to input signal to be measured, and its core devices is chip ADC0809; The equal ground connection of pin 5,4,3,2,1,28,27,16,23,24,25 of chip ADC0809; Pin 17,14,15,8,18,19,20,21 stamps network label D0, D1, D2, D3, D4, D5, D6, D7 respectively; Pin 7,9,6,10 stamps network label EOC, OE, ST, CLK respectively.
7. gas pressure detection meter according to claim 1, is characterized in that: the core devices of described liquid crystal display circuit is LCDs LCD1602, pin 1 ground connection of LCDs LCD1602; Pin 2 meets VCC; Pin 3 is connected on one end of slide rheostat RV1; Other two ends ground connection and the VCC respectively of slide rheostat RV1; Pin 4,5,6 stamps network label P20, P21, P22 respectively; Pin 7,8,9,10,11,12,13,14 stamps network label D0, D1, D2, D3, D4, D5, D6, D7 respectively; Pin 15 meets VCC; Pin 16 ground connection; Pin 1 ground connection of connector RP1; 2,3,4,5,6,7,8,9 of connector RP1 stamps network label D0, D1, D2, D3, D4, D5, D6, D7 respectively.
8. gas pressure detection meter according to claim 2, is characterized in that: the core devices of described reset circuit is 10uF/35V electrolytic condenser; The positive pole of electrolytic condenser C3 meets VCC; The negative pole of electrolytic condenser C3 is by resistance R10 ground connection; Button SW-PB is connected in parallel on the two ends of electrolytic condenser; The negative pole of electrolytic condenser stamps network label RST.
9. gas pressure detection meter according to claim 3, is characterized in that: the core devices of described crystal oscillating circuit is crystal oscillator G1; The two ends of crystal oscillator G1 stamp network label X1, X2 respectively; One end of crystal oscillator G1 is by electric capacity C4 ground connection, and the other end is by electric capacity C5 ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520150983.7U CN204422130U (en) | 2015-03-17 | 2015-03-17 | A kind of gas pressure detection meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520150983.7U CN204422130U (en) | 2015-03-17 | 2015-03-17 | A kind of gas pressure detection meter |
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| Publication Number | Publication Date |
|---|---|
| CN204422130U true CN204422130U (en) | 2015-06-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520150983.7U Expired - Fee Related CN204422130U (en) | 2015-03-17 | 2015-03-17 | A kind of gas pressure detection meter |
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| CN (1) | CN204422130U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109752134A (en) * | 2018-04-04 | 2019-05-14 | 北京字节跳动网络技术有限公司 | A kind of detection method and device of gas pressure |
| CN112254870A (en) * | 2020-09-30 | 2021-01-22 | 武汉德塞仪器仪表科技有限公司 | High-precision gas micro-differential pressure gauge |
-
2015
- 2015-03-17 CN CN201520150983.7U patent/CN204422130U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109752134A (en) * | 2018-04-04 | 2019-05-14 | 北京字节跳动网络技术有限公司 | A kind of detection method and device of gas pressure |
| CN112254870A (en) * | 2020-09-30 | 2021-01-22 | 武汉德塞仪器仪表科技有限公司 | High-precision gas micro-differential pressure gauge |
| CN112254870B (en) * | 2020-09-30 | 2022-07-05 | 武汉德塞仪器仪表科技有限公司 | High-precision gas micro-differential pressure gauge |
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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: 20150624 Termination date: 20160317 |
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| CF01 | Termination of patent right due to non-payment of annual fee |