CN102401675A - Gas meter counting device with temperature and pressure compensation - Google Patents
Gas meter counting device with temperature and pressure compensation Download PDFInfo
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- CN102401675A CN102401675A CN201010281185XA CN201010281185A CN102401675A CN 102401675 A CN102401675 A CN 102401675A CN 201010281185X A CN201010281185X A CN 201010281185XA CN 201010281185 A CN201010281185 A CN 201010281185A CN 102401675 A CN102401675 A CN 102401675A
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Abstract
The invention relates to a counting device, in particular to a gas meter counting device with temperature and pressure compensation. In order to overcome an error between a gas meter display value and an actual gas passing amount when temperature and pressure are different from standards, the device comprises a central processing unit, a power unit, a signal acquisition unit and an output unit. The device is compact in structure, and can effectively solve the technical problem of inaccurate measurement of a gas meter caused by the change of ambient pressure and temperature.
Description
Technical field
The present invention relates to a kind of counting assembly, specifically be meant a kind of gas meter, flow meter counting assembly that contains temperature pressure compensation.
Background technology
Mostly gas meter, flow meter the time is that at counting be that a gas throughput under the standard atmosphere condition is counted with temperature at 20 ℃, pressure; When temperature, when pressure changes; Actual amount and the counting under the standard conditions that gas passes through have certain error through amount, cause gas meter, flow meter to show that numerical value is with actual inconsistent through gas volume numerical value.
Summary of the invention
Gas meter, flow meter shows numerical value and the actual error through amount of gas when temperature, pressure and standard are variant in order to overcome, and the present invention provides a kind of gas meter, flow meter counting assembly that contains temperature pressure compensation.
The technical scheme that the present invention adopts is: contain the gas meter, flow meter counting assembly of temperature pressure compensation, this device is an electronics automatic processing device, and it comprises:
---central processor unit, said central processing unit are chip MSP430F2013, and this chip comprises power supply port Vcc, grounding ports Vss, I/O mouth p1.1-p1.7 and p2.6-p2.7, reseting port Rst;
---power supply unit, this unit adopts chip LM7805 output+5V voltage and HT7133 output+3.3V voltage;
---signal pick-up unit, this unit contains Hall element, pressure transducer and temperature sensor;
---output unit, this unit comprises the demonstration light emitting diode;
It is characterized in that: the Hall element in the signal pick-up unit, its signal output part links to each other with the I/O mouth P1.4 of central processing unit; Pressure transducer, its output signal links to each other with I/O mouth P1.0, the P1.1 of central processing unit; Temperature sensor adopts the central processing unit built-in temperature sensor;
Its minus earth of demonstration light emitting diode in the output unit, anodal first current-limiting resistance that passes through links to each other with the I/O mouth P2.7 of central processing unit.
Hall element in the said signal pick-up unit, its model are A3212-SMD.
Pressure transducer in the said signal pick-up unit, its model are STI8000.
Described output unit comprises a NPN triode that plays on-off action, the grounded emitter of triode, and its base stage links to each other with the I/O mouth P2.7 of central processing unit through second current-limiting resistance, and its collector warp the 3rd current-limiting resistance links to each other with+5V voltage.
Beneficial effect of the present invention: this device calculates gas through volume after utilizing Hall element to pick up the mechanical rotation magnetic signal, converses the calibrating gas volume under corresponding 20 ℃, 1 atmospheric pressure according to pressure, the measured pressure and temp of temperature sensor through the central processing unit internal processes then.This apparatus structure is compact, can effectively remedy the inaccurate technical matters of measurement that gas meter, flow meter produces owing to environmental pressure, temperature variation.
Description of drawings
Accompanying drawing is the concrete control circuit figure of this device.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Shown in accompanying drawing; The core of this device is a central processor unit; This central processing unit is chip MSP430F2013; This chip comprises power supply port Vcc, grounding ports Vss, I/O mouth p1.1-p1.7 and p2.6-p2.7, reseting port Rst, power supply employing+3.3V power supply, and this power supply is supplied with by the chip HT7133 output of power supply unit.
Power supply unit; As shown in the figure; The input end of chip LM7805 is imported by external voltage, and use and as the input voltage of HT7133 on its output terminal output+5V power voltage supply road, and HT7133 output+3.3V voltage supplies central processing unit and Hall element, pressure transducer use.
Hall element in the signal pick-up unit is selected A3212-SMD for use, and its wire size output pin Vout links to each other with the I/O mouth P1.4 of central processing unit; The pressure transducer model is selected STI8000 for use, and this sensor adopts foil gauge to form the strain bridge structure, and at its signal output pin 2 and 4 output signals, its pin two, the 4 I/O mouth P1.1 respectively at central processing unit, P1.0 link to each other behind the pressurized; Because central processing unit MSP430F2013 built-in temperature sensor, so the measurement of temperature directly utilizes its internal temperature sensor to get final product;
Its minus earth of demonstration light emitting diode D1 in the output unit, the anodal first current-limiting resistance R5 that passes through links to each other with the I/O mouth P2.7 of central processing unit.
Because in measuring process; The P2.7 mouth of central processing unit MSP430F2013 can be seen a series of count pulse off, is sent in other counting assembly for making count pulse, in the output unit of device, has increased the NPN triode Q1 of an on-off action; Be used for voltage transitions; The transmitter ground connection of triode, its base stage link to each other with the I/O mouth P2.7 of central processing unit through the second current-limiting resistance R4, and its collector warp the 3rd current-limiting resistance R1 links to each other with+5V voltage.
Concrete principle of work is: for example at the toothed disc periphery of minimum rotation counting gear 10 magnetic stakes are installed evenly; Let this gear through Hall element A3212-SMD; The moving magnetic stake Hall element of gear revolution just can produce a signal and deliver to central processing unit; Be that corresponding gas passes through a pulse volume, we establish this pulse volume is V
0, we read temperature T at this moment
0, pressure P
0, converse a pulse gas volume V under corresponding 20 ℃, 1 atmospheric pressure according to gas temperature, pressure, cubature formula
Std=f (V
0, T
0, P
0), when mechanical hook-up constantly rotated output pulse signal, we will be to the V of each generation
StdAdd up and obtain cumulative volume Vs.If the output pulse volume is Vp; When Vs >=Vp; Vs=Vs-Vp exports a pulse simultaneously, and the demonstration light emitting diode D1 in the output unit is lighted in this pulse; The triode Q1 that plays on-off action in the while triggering and conducting output unit, the collector of Q1 outwards output one pulse supplies rearmounted connection device to handle.
Claims (4)
1. the gas meter, flow meter counting assembly that contains temperature pressure compensation, this device are an electronics automatic processing device, and it comprises:
---central processor unit, said central processing unit are chip MSP430F2013, and this chip comprises power supply port Vcc, grounding ports Vss, I/O mouth p1.1-p1.7 and p2.6-p2.7, reseting port Rst;
---power supply unit, this unit adopts chip LM7805 output+5V voltage and HT7133 output+3.3V voltage;
---signal pick-up unit, this unit contains Hall element, pressure transducer and temperature sensor;
---output unit, this unit comprises the demonstration light emitting diode;
It is characterized in that: the Hall element in the signal pick-up unit, its signal output part links to each other with the I/O mouth P1.4 of central processing unit; Pressure transducer, its output signal links to each other with I/O mouth P1.0, the P1.1 of central processing unit; Temperature sensor adopts the central processing unit built-in temperature sensor;
Its minus earth of demonstration light emitting diode in the output unit, anodal first current-limiting resistance that passes through links to each other with the I/O mouth P2.7 of central processing unit.
2. the gas meter, flow meter counting assembly that contains temperature pressure compensation according to claim 1; It is characterized in that: described output unit comprises a NPN triode that plays on-off action; The grounded emitter of triode; Its base stage links to each other with the I/O mouth P2.7 of central processing unit through second current-limiting resistance, and its collector warp the 3rd current-limiting resistance links to each other with+5V voltage.
3. the gas meter, flow meter counting assembly that contains temperature pressure compensation according to claim 1 is characterized in that: the Hall element in the said signal pick-up unit, its model are A3212-SMD.
4. the gas meter, flow meter counting assembly that contains temperature pressure compensation according to claim 1 is characterized in that: the pressure transducer in the said signal pick-up unit, its model are STI8000.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010281185XA CN102401675A (en) | 2010-09-09 | 2010-09-09 | Gas meter counting device with temperature and pressure compensation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010281185XA CN102401675A (en) | 2010-09-09 | 2010-09-09 | Gas meter counting device with temperature and pressure compensation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102401675A true CN102401675A (en) | 2012-04-04 |
Family
ID=45884117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010281185XA Pending CN102401675A (en) | 2010-09-09 | 2010-09-09 | Gas meter counting device with temperature and pressure compensation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102401675A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103791969A (en) * | 2014-02-25 | 2014-05-14 | 成都秦川科技发展有限公司 | Gas meter internally provided with mechanical gas temperature conversion device |
| CN104034379A (en) * | 2014-06-20 | 2014-09-10 | 上海真兰仪表科技股份有限公司 | Electronic-type wide-range industrial-and-commercial-mode gas meter |
| CN104949725A (en) * | 2015-06-25 | 2015-09-30 | 苏州市英富美欣科技有限公司 | Gas flow collection device based on temperature and pressure intensity compensation |
| CN112539791A (en) * | 2020-11-24 | 2021-03-23 | 重庆市山城燃气设备有限公司 | Electronic temperature and pressure compensation gas meter and compensation method |
-
2010
- 2010-09-09 CN CN201010281185XA patent/CN102401675A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103791969A (en) * | 2014-02-25 | 2014-05-14 | 成都秦川科技发展有限公司 | Gas meter internally provided with mechanical gas temperature conversion device |
| CN103791969B (en) * | 2014-02-25 | 2016-09-21 | 成都秦川科技发展有限公司 | A kind of gas meter, flow meter of Built-in mechanical gas temperature conversion equipment |
| CN104034379A (en) * | 2014-06-20 | 2014-09-10 | 上海真兰仪表科技股份有限公司 | Electronic-type wide-range industrial-and-commercial-mode gas meter |
| CN104949725A (en) * | 2015-06-25 | 2015-09-30 | 苏州市英富美欣科技有限公司 | Gas flow collection device based on temperature and pressure intensity compensation |
| CN112539791A (en) * | 2020-11-24 | 2021-03-23 | 重庆市山城燃气设备有限公司 | Electronic temperature and pressure compensation gas meter and compensation method |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120404 |