Intelligent gas meter with temperature and pressure compensation and pressure monitoring functions

Abstract

The utility model discloses an intelligent gas meter with temperature and pressure compensation and pressure monitoring functions. The intelligent gas meter comprises a temperature and pressure sensor unit, an absolute pressure sensor unit, an ultra-low power consumption microprocessor, a wireless communication unit, a metering unit, a motor valve control unit, a power management unit and a gas meter base meter, the ultra-low power consumption microprocessor is respectively connected with the temperature and pressure sensor unit, the absolute pressure sensor unit and the wireless communication unit, the gas meter base meter is respectively connected with the output end of the motor valve control unit and the input end of the metering unit, and the motor valve control unit is controlled by the ultra-low power consumption microprocessor so as to control a built-in motor valve of the base meter. According to the utility model, data interaction is carried out through the wireless communication unit and the background server, so that the pressure of the meter is remotely monitored. The temperature and pressure sensor and the absolute pressure sensor are arranged, real-time monitoring and early warning of the pressure of the gas pipeline are achieved, the safety and reliability of gas use are improved, meanwhile, temperature and pressure compensation can be conducted on the metered gas volume through the temperature and pressure sensor, and metering is more accurate.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas meters, and in particular relates to an intelligent gas meter with temperature and pressure compensation and pressure monitoring functions. Background Art

[0002] As people's living standards improve, gas, as a clean and efficient energy source, is widely used in households, businesses and industries. Accurate measurement is one of the main functions of a gas meter. However, there are certain safety hazards in the use of gas, among which abnormal gas pipeline pressure is a problem that cannot be ignored. Too high or too low gas pipeline pressure may lead to safety accidents, such as pipeline rupture and explosion. Therefore, how to monitor the gas pipeline pressure in real time to ensure accurate gas measurement and safe use has become an urgent problem to be solved. Summary of the invention

[0003] The utility model aims to solve the above problems of the prior art and proposes a smart gas meter with temperature and pressure compensation and pressure monitoring functions to improve the security and privacy protection level in the process of smart gas management.

[0004] The technical solution adopted by the utility model is:

[0005] A smart gas meter with temperature and pressure compensation and pressure monitoring functions comprises an ultra-low power consumption microprocessor, a motor valve control unit, a gas meter base meter, a metering unit, a power management unit, an absolute pressure sensor unit and a temperature and pressure sensor unit, wherein the gas meter base meter is respectively connected to the output end of the motor valve control unit and the input end of the metering unit, and the ultra-low power consumption microprocessor is respectively connected to the input end of the motor valve control unit, the output end of the metering unit and the power management unit; the ultra-low power consumption microprocessor is bidirectionally connected to the absolute pressure sensor unit and the temperature and pressure sensor unit respectively; the temperature and pressure sensor unit is assembled in the gas meter base meter cavity to detect the temperature and absolute pressure value inside the gas meter, the absolute pressure sensor unit is assembled outside the gas meter base meter cavity to detect the atmospheric pressure value, and the ultra-low power consumption microprocessor compensates for the volume of the working condition according to the obtained temperature and absolute pressure value inside the meter to obtain the standard volume, and / or obtains the meter pressure through the atmospheric pressure value and the absolute pressure value inside the meter, thereby detecting the pressure change.

[0006] On the basis of the above scheme, it also includes a wireless communication unit, which is bidirectionally connected to the ultra-low power consumption microprocessor, and the wireless communication unit communicates with the server to remotely monitor the meter.

[0007] Furthermore, the wireless communication unit communicates with the server using LoRa spread spectrum communication mode, GPRS communication mode or NB-IoT communication mode, or one of other wireless communication modes.

[0008] Furthermore, the metering unit adopts a Hall sensor or an ultrasonic sensor. The Hall sensor is a conversion device that converts the rotation angle of the pulse wheel into a pulse signal. The ultrasonic gas meter metering module adopting the ultrasonic sensor outputs a digital signal.

[0009] The above scheme also includes a human-machine interface and a data storage unit, and the ultra-low power consumption microprocessor is bidirectionally connected with the human-machine interface and the data storage unit respectively.

[0010] Furthermore, the human-machine interface includes one or a combination of an LCD display, a button, a buzzer and a light-emitting diode, which is used for information interaction with the user.

[0011] Furthermore, the data storage unit is used to store sensitive data of the user, and the sensitive data includes remaining amount, remaining gas volume, unit price, meter ID, pressure value, and data record.

[0012] Specifically, the ultra-low power consumption microprocessor adopts STM8L or FM33L series microprocessor.

[0013] The utility model is a smart gas meter with temperature and pressure compensation and pressure monitoring functions. Starting from the safety requirements of smart gas meters, it focuses on the safety of gas use and has the following advantages:

[0014] Early warning function: When the gas pipeline pressure is abnormal, the microprocessor will send out an early warning signal to remind the user to take timely measures to avoid safety accidents.

[0015] Intuitive display: The display module can intuitively display gas usage, pipeline pressure and early warning information, allowing users to understand gas usage and pipeline pressure status at any time.

[0016] Scalability: The smart gas meter of the present invention can also be connected to other smart home devices to achieve remote monitoring and control, thereby improving the intelligence level of gas use.

[0017] The utility model starts from the measurement accuracy of the intelligent gas meter and adopts a combination of an absolute pressure sensor unit and a temperature and pressure sensor unit to simultaneously output the standard volume and the working volume to meet the different needs of users. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] In the figure: 1-ultra-low power consumption microprocessor, 2-motor valve control unit, 3-gas meter base meter, 4-metering unit, 5-human-machine interface, 6-wireless communication unit, 7-power management unit, 8-data storage unit, 9-absolute pressure sensor unit, 10-temperature and pressure sensor unit. DETAILED DESCRIPTION

[0020] like Figure 1 As shown, an intelligent gas meter with temperature and pressure compensation and pressure monitoring functions includes: a temperature and pressure sensor unit 10, an absolute pressure sensor unit 9, an ultra-low power consumption microprocessor 1, a wireless communication unit 6, a metering unit 4, a motor valve control unit 2, a power management unit 7, a data storage unit 8, a man-machine interface 5 and a gas meter base meter 3; the ultra-low power consumption microprocessor 1 is bidirectionally connected with the wireless communication unit 6, the man-machine interface 5, the temperature and pressure sensor unit 10, the absolute pressure sensor unit 9 and the data storage unit 8 respectively, the ultra-low power consumption microprocessor 1 is also unidirectionally connected with the motor valve control unit 2, the metering unit 4 and the power management unit 7 respectively, and the gas meter base meter 3 is connected with the output end of the motor valve control unit 2 and the input end of the metering unit 4 respectively.

[0021] The data storage unit 8 is used to store the user's sensitive data, such as remaining amount, remaining gas volume, unit price, meter ID, pressure value, data record and other information. When the gas meter communicates with the background server, the ultra-low power consumption microprocessor 1 can send it to the server through the wireless communication unit 6 to complete the data interaction function and realize the remote monitoring meter function.

[0022] The metering unit 4 is used to obtain the pulse gear angle change of the gas meter base meter 3, and convert the pulse gear angle change result of the gas meter base meter 3 into an electrical signal and feed it back to the ultra-low power consumption microprocessor 1. The metering unit 4 can be a Hall sensor as a conversion device to convert the rotation angle of the pulse wheel into a pulse signal, or it can be a digital signal output by an ultrasonic module.

[0023] The ultra-low power consumption microprocessor 1 is used for gas meter measurement, data processing, storage, data transmission and display, etc. STM8L or FM33L series microprocessors can be used.

[0024] The wireless communication unit 6 is used to establish a data exchange channel between the gas meter and the gas management system. The metering data, rate data, pressure data, operating status data and record data stored in the data storage unit 8 can be encrypted and transmitted to the server. Similarly, the data sent by the server is received by the wireless communication unit 6 and reaches the gas meter terminal, and the gas meter terminal performs corresponding actions. One of the LoRa spread spectrum communication method, GPRS communication method, NB-IoT communication method or other wireless communication methods can be used.

[0025] The power management unit 7 is used to provide auxiliary power to the data storage unit 8, the temperature and pressure sensor unit 10, the absolute pressure sensor unit 9, the ultra-low power consumption microprocessor 1, the wireless communication unit 6, the metering unit 4, the motor valve control unit 2, and the human-machine interface 5.

[0026] The human-machine interface 5 is used to display the status information, metering data and abnormal information of the gas meter. It is an interface for information exchange between the gas meter and the user, and adopts one or a combination of LCD display, buttons, buzzer and light-emitting tube.

[0027] The gas meter base meter 3 also has a built-in counting wheel. When the gas meter base meter 3 is in ventilation operation, the counting wheel is driven to rotate, thereby changing the angle of the pulse wheel. Through the metering unit 4, a metering pulse signal is output to the ultra-low power consumption microprocessor 1 for counting.

[0028] The motor valve control unit 2 receives the control signal of the ultra-low power consumption microprocessor 1 , and then controls the motor valve built into the gas meter base meter 3 .

[0029] The temperature and pressure sensor unit 10 is installed in the cavity of the gas meter base meter 3 to detect the temperature and absolute pressure value inside the gas meter. The absolute pressure sensor unit 9 is installed outside the cavity to detect the atmospheric pressure value. On the one hand, the ultra-low power consumption microprocessor 1 can compensate the volume of the working condition according to the temperature and absolute pressure value inside the meter through the state equation of the gas, and calculate the cumulative gas volume under standard conditions, thereby ensuring accurate measurement. On the other hand, through the pressure collected externally and the internal pressure difference, the corresponding alarm information is issued according to the safety pressure threshold of the pipeline, and the meter safety pressure detection is realized. The alarm information is reported to the server through the wireless communication unit 6, and the meter safety remote pressure monitoring function is realized. The ultra-low power consumption microprocessor 1 uses the state equation of the gas to calculate the standard volume of the gas, which adopts the calculation formula in the prior art, which is not the innovation of the present utility model.

Claims

1. An intelligent gas meter with temperature and pressure compensation and pressure monitoring functions, characterized in that: The gas meter base meter (3) comprises an ultra-low power consumption microprocessor (1), a motor valve control unit (2), a gas meter base meter (3), a metering unit (4), a power management unit (7), an absolute pressure sensor unit (9) and a temperature and pressure sensor unit (10), wherein the gas meter base meter (3) is respectively connected to the output end of the motor valve control unit (2) and the input end of the metering unit (4), and the ultra-low power consumption microprocessor (1) is respectively connected to the input end of the motor valve control unit (2), the output end of the metering unit (4) and the power management unit (7); the ultra-low power consumption microprocessor (1) is respectively connected to the absolute pressure sensor unit (9) and the temperature and pressure sensor unit (10). The pressure sensor unit (9) and the temperature and pressure sensor unit (10) are bidirectionally connected; the temperature and pressure sensor unit (10) is mounted in the cavity of the gas meter base (3) to detect the temperature and absolute pressure value inside the gas meter, and the absolute pressure sensor unit (9) is mounted outside the cavity of the gas meter base (3) to detect the atmospheric pressure value. The ultra-low power consumption microprocessor (1) compensates the volume of the working condition according to the obtained temperature and absolute pressure value inside the meter to obtain the standard condition volume, and / or obtains the meter pressure through the atmospheric pressure value and the absolute pressure value inside the meter, thereby detecting the pressure change.

2. According to claim 1, a smart gas meter with temperature and pressure compensation and pressure monitoring functions is characterized in that: It also comprises a wireless communication unit (6), wherein the wireless communication unit (6) is bidirectionally connected to the ultra-low power consumption microprocessor (1), and the wireless communication unit (6) communicates with a server to remotely monitor the meter.

3. According to claim 2, a smart gas meter with temperature and pressure compensation and pressure monitoring functions is characterized in that: The wireless communication unit (6) communicates with the server using a LoRa spread spectrum communication method, a GPRS communication method or a NB-IoT communication method.

4. According to claim 1, a smart gas meter with temperature and pressure compensation and pressure monitoring functions is characterized in that: The metering unit (4) adopts a Hall sensor or an ultrasonic sensor.

5. The smart gas meter with temperature and pressure compensation and pressure monitoring functions according to any one of claims 1 to 4, characterized in that: It also comprises a human-machine interface (5) and a data storage unit (8), and the ultra-low power consumption microprocessor (1) is bidirectionally connected to the human-machine interface (5) and the data storage unit (8).

6. The intelligent gas meter with temperature and pressure compensation and pressure monitoring functions according to claim 5, characterized in that: The human-machine interface (5) comprises one or a combination of an LCD display, a key, a buzzer and a light-emitting diode, and is used for information interaction with a user.

7. The intelligent gas meter with temperature and pressure compensation and pressure monitoring functions according to claim 5, characterized in that: The data storage unit (8) is used to store sensitive data of the user, wherein the sensitive data includes remaining amount, remaining gas volume, unit price, meter ID, pressure value, and data record.

8. An intelligent gas meter with temperature and pressure compensation and pressure monitoring functions according to claim 1 or 2 or 3 or 4 or 6 or 7, characterized in that: The ultra-low power consumption microprocessor (1) adopts an STM8L or FM33L series microprocessor.

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