CN203224265U - Membrane type gas meter - Google Patents
Membrane type gas meter Download PDFInfo
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- CN203224265U CN203224265U CN 201320247806 CN201320247806U CN203224265U CN 203224265 U CN203224265 U CN 203224265U CN 201320247806 CN201320247806 CN 201320247806 CN 201320247806 U CN201320247806 U CN 201320247806U CN 203224265 U CN203224265 U CN 203224265U
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Abstract
The utility model discloses a membrane type gas meter which comprises a power source, a power source detection circuit, a main control unit, a valve control circuit, a magnetic-attacking-prevention unit, a display circuit, a wireless module circuit, a tunnel magnetoresistance sensor gas metering processing unit and a temperature and pressure sensing circuit. The tunnel magnetoresistance sensor gas metering processing unit is connected with an I/O pin of the main control unit through a cable, and the temperature and pressure sensing circuit is connected with the I/O pin of the main control unit through an I2C bus. The service life of the tunnel magnetoresistance sensor gas metering processing unit is far longer than that of a reed switch, data of an adopted digital type low-power-consumption temperature and pressure sensing chip are interactive in a serial data line mode, convenience is brought to frequently collect temperature and pressure data, reliability of the membrane type gas meter is greatly improved, and the service life of the membrane type gas meter is greatly prolonged. In addition, the membrane type gas meter is ultra-low in power consumption, high in sensitivity, strong in magnetic-attacking prevention, far in communication distance and strong in wall penetration capability.
Description
Technical field
The utility model relates to a kind of gas meter, flow meter, particularly a kind of diaphragm gas meter.
Background technology
Gas resident gas meter generally adopts diaphragm gas meter, because price reasons, the common way in most of cities is that the resident adopts the diaphragm gas meter of not being with temperature and pressure compensation.Each gas company and the upstream gas company used measuring apparatus of combustion gas trade settlement are the intelligence table that has temperature, pressure automatic compensation function, and its metering result all is that conversion is the volume under the standard state (101.325kPa, 20 ℃).Yet, the a lot of diaphragm gas meters that do not have the temperature and pressure compensation function that all still adopt of the combustion gas resident of gas company operation at present, its reading is the operating mode bulking value that does not compensate through temperature and pressure, like this, air feed total amount and total sales volume certainly exist certain error, and particularly this error is more obvious during winter.
In addition, on metering method, most resident's gas meter, flow meters adopt the tongue tube pulse modes, and tongue tube be machinery contact conductive features, and access times are limited, and are fragile, be subject to the magnetic interference influence and measure.
The utility model content
The purpose of this utility model provides the high diaphragm gas meter of a kind of reliability.
This diaphragm gas meter that the utility model provides, this gas meter, flow meter comprises power supply, power sense circuit, main control unit, valve controling circuit, antimagnetic attack unit, display circuit, wireless module circuit, tunnel magneto resistance sensor gas metering processing unit and temperature and pressure sensing circuit, tunnel magneto resistance sensor gas metering processing unit links to each other with the I/O pin of main control unit by cable, and the temperature and pressure sensing circuit passes through I
2The C bus links to each other with the I/O pin of main control unit.
Described tunnel magneto resistance sensor gas metering processing unit comprises tunnel Magnetic Sensor D1, the Vcc pin of tunnel Magnetic Sensor D1 links to each other with power vd D, also by capacitor C 1 ground connection, its Vout pin links to each other with the I/O pin of main control unit this pin, its GND pin ground connection.
Described temperature and pressure sensing circuit comprises temperature and pressure sensing chip D2,1 pin of temperature and pressure sensing chip D2 links to each other with power vd D with 4 pin, its 2 pin is by capacitor C 2 ground connection, its 3 pin ground connection, its 7 pin links to each other with power vd D by resistance R 2, and links to each other with the I/O pin of main control unit, be used for communicated data signal SDA, 8 pin of described temperature and pressure sensing chip D2 link to each other with power vd D by resistance R 1, and link to each other with the I/O pin of main control unit, are used for transmitting clock signal SCL.
The tunnel magneto resistance sensor gas metering processing unit that the utility model is chosen, serviceable life, the temperature and pressure sensing unit main body that it adopts was digital low power consumption temperature and pressure sensing chips considerably beyond tongue tube, data are passed through I
2The C bus mode is mutual, is convenient to frequent collecting temperature, pressure data, thereby has significantly improved reliability of the present utility model and serviceable life.In addition, the utility model adopts micropower wireless networking technology, and power consumption is ultralow, and is highly sensitive, and antimagnetic attack is strong, and communication distance is far away, and ability through walls is strong.
Description of drawings
Fig. 1 is functional block diagram of the present utility model.
Fig. 2 is the circuit diagram of the utility model tunnel magneto resistance sensor gas metering processing unit.
Fig. 3 is the circuit diagram of the utility model temperature and pressure sensing circuit.
Embodiment
As shown in Figure 1, the utility model comprises power supply, power sense circuit, main control unit, valve controling circuit, antimagnetic attack unit, display circuit, wireless module circuit, tunnel magneto resistance sensor gas metering processing unit and temperature and pressure sensing circuit, tunnel magneto resistance sensor gas metering processing unit links to each other with the I/O pin of main control unit by cable, and the temperature and pressure sensing circuit passes through I
2The C bus links to each other with the I/O pin of main control unit.
As shown in Figure 2, tunnel magneto resistance sensor gas metering processing unit comprises tunnel Magnetic Sensor D1, and the Vcc pin of tunnel Magnetic Sensor D1 links to each other with power vd D, and this pin is also by capacitor C 1 ground connection, its Vout pin links to each other with the I/O pin of main control unit, its GND pin ground connection.
When the counter character wheel of table meter rotated, after tunnel Magnetic Sensor D1 sensed the magnetic field of the magnet formation in the character wheel, output tolerance signal was given main control unit.Main control unit is handled and is calculated the tolerance signal, draws the work condition state rock gas volume of use.
As shown in Figure 3, the temperature and pressure sensing circuit comprises temperature and pressure sensing chip D2,1 pin of temperature and pressure sensing chip D2 links to each other with power vd D with 4 pin, and its 2 pin is by capacitor C 2 ground connection, its 3 pin ground connection, its 7 pin links to each other with power vd D by resistance R 2, and link to each other with the I/O pin of main control unit, being used for communicated data signal SDA, 8 pin of described temperature and pressure sensing chip D2 link to each other with power vd D by resistance R 1, and link to each other with the I/O pin of main control unit, be used for transmitting clock signal SCL.
Temperature and pressure sensing chip D2 passes through I with the temperature data in the pipeline, pressure data
2The C bus transfer is given main control unit.Main control unit is converted into mark condition state rock gas volume according to the equation of gas state with the work condition state rock gas volume that uses.
The resident can adopt wireless remote transmission or IC-card way of paying that gas meter, flow meter is supplemented with money after gas is purchased in the site, also can carry out Online Payment at home.The gas meter, flow meter wireless module can be sent to the Surveillance center of combustion gas operator by collecting device with tolerance, amount of money data, and this wireless module also can receive data and control command by relevant device in addition, exports to main control unit.
When the situation that system regulation occurs, as Surveillance center's Long-distance Control, advance payment reach the overdraw lower limit, continue magnetic attacks, during situation such as battery power down, the low electricity of battery, main control unit is carried out the pass valve by the invention control circuit and is operated.
The utility model gas meter, flow meter adopts the tunnel magneto resistance sensor to gather the tolerance data, the tunnel magneto resistance sensor belongs to a kind of in the magnetic transducing technology, be followed successively by hall effect sensor, anisotropic magnetoresistance sensor, giant magnetoresistance sensor, tunnel magneto resistance sensor in proper order according to the magnetic transducing technical development, its excess-three kind sensor also can be used for be gathered the tolerance data, but the low-power consumption of tunnel magneto resistance sensor, sensitivity resolution height, working range is wide, operating temperature range is big and advantage such as high frequency response makes it have more advantage.
Claims (3)
1. diaphragm gas meter, this gas meter, flow meter comprises power supply, power sense circuit, main control unit, valve controling circuit, antimagnetic attack unit, display circuit and wireless module circuit, it is characterized in that, also comprise tunnel magneto resistance sensor gas metering processing unit and temperature and pressure sensing circuit, tunnel magneto resistance sensor gas metering processing unit links to each other with the I/O pin of main control unit by cable, and the temperature and pressure sensing circuit passes through I
2The C bus links to each other with the I/O pin of main control unit.
2. diaphragm gas meter according to claim 1, it is characterized in that, described tunnel magneto resistance sensor gas metering processing unit comprises tunnel Magnetic Sensor D1, the Vcc pin of tunnel Magnetic Sensor D1 links to each other with power vd D, this pin is also by capacitor C 1 ground connection, its Vout pin links to each other with the I/O pin of main control unit, its GND pin ground connection.
3. diaphragm gas meter according to claim 1, it is characterized in that, described temperature and pressure sensing circuit comprises temperature and pressure sensing chip D2,1 pin of temperature and pressure sensing chip D2 links to each other with power vd D with 4 pin, its 2 pin is by capacitor C 2 ground connection, its 3 pin ground connection, its 7 pin links to each other with power vd D by resistance R 2, and link to each other with the I/O pin of main control unit, be used for communicated data signal SDA, 8 pin of described temperature and pressure sensing chip D2 link to each other with power vd D by resistance R 1, and link to each other with the I/O pin of main control unit, are used for transmitting clock signal SCL.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320247806 CN203224265U (en) | 2013-05-09 | 2013-05-09 | Membrane type gas meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320247806 CN203224265U (en) | 2013-05-09 | 2013-05-09 | Membrane type gas meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203224265U true CN203224265U (en) | 2013-10-02 |
Family
ID=49251268
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320247806 Expired - Lifetime CN203224265U (en) | 2013-05-09 | 2013-05-09 | Membrane type gas meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203224265U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105118178A (en) * | 2015-09-06 | 2015-12-02 | 成都伦力表具有限公司 | Smart gas meter capable of turning off valve under the condition of shaking |
| CN113685733A (en) * | 2021-08-23 | 2021-11-23 | 宁波天鑫金属软管有限公司 | Gas pipeline monitoring circuit based on intelligent gateway |
-
2013
- 2013-05-09 CN CN 201320247806 patent/CN203224265U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105118178A (en) * | 2015-09-06 | 2015-12-02 | 成都伦力表具有限公司 | Smart gas meter capable of turning off valve under the condition of shaking |
| CN113685733A (en) * | 2021-08-23 | 2021-11-23 | 宁波天鑫金属软管有限公司 | Gas pipeline monitoring circuit based on intelligent gateway |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131002 |