Intelligent gas meter controller with gas hydrogen doping concentration detection function

Abstract

The intelligent gas meter controller comprises a controller circuit, a valve circuit, a liquid crystal display circuit, a communication circuit, a power supply circuit, a hydrogen concentration detection circuit and a metering circuit, wherein the valve circuit, the liquid crystal display circuit, the communication circuit, the power supply circuit, the hydrogen concentration detection circuit and the metering circuit are connected with the controller circuit. The controller circuit comprises a chip U1, a capacitor C10, a capacitor C11, a crystal oscillator X1 and a battery voltage acquisition circuit, and the hydrogen concentration detection circuit comprises a JXMH2 hydrogen concentration detection module J8, a resistor R23 and a triode Q5. According to the utility model, the problem that the traditional gas meter cannot obtain the hydrogen content ratio in the detected gas under the current hydrogen doping trend of a gas pipeline is solved, and the concentration of hydrogen in the gas flowing through the gas meter is detected and reported. Besides, effective safety guarantee is also carried out on gas use safety of resident users based on hydrogen concentration detection of the gas meter, and the overall power consumption of the gas meter is effectively saved by timely controlling on and off of a power supply of the hydrogen concentration detection module.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas meter controllers and relates to an intelligent gas meter controller for detection, in particular to an intelligent gas meter controller with gas hydrogen blending concentration detection function. Background Art

[0002] With the rapid development of hydrogen energy, the demand for hydrogen-enriched gas is increasing. However, low-concentration hydrogen is difficult for humans to detect through smell, so adding hydrogen to gas can pose a safety hazard. While some gas hydrogen-enriched gas detection instruments are currently available on the market, they are inconvenient to use and lack convenient connection to gas meters. Therefore, there is an urgent need for an intelligent gas meter controller that can monitor and display the hydrogen-enriched gas concentration in real time. Utility Model Content

[0003] The purpose of the utility model is to provide an intelligent gas meter controller with gas hydrogen concentration detection, so as to solve the problem that the existing gas hydrogen concentration detection instrument is inconvenient to use and cannot be conveniently connected to the gas meter.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] An intelligent gas meter controller with gas hydrogen concentration detection function includes a controller circuit and a valve circuit, a liquid crystal display circuit, a communication circuit and a power supply circuit connected to the controller circuit. It also includes a hydrogen concentration detection circuit and a metering circuit connected to the controller circuit.

[0006] The controller circuit includes a chip U1, a capacitor C10, a capacitor C11, a crystal oscillator X1, and a battery voltage acquisition circuit. The chip U1 uses an FM33LC025N single-chip microcomputer. The 36th pin of the chip U1 is connected to one end of the crystal oscillator X1 and one end of the capacitor C11. The 37th pin of the chip U1 is connected to the other end of the crystal oscillator X1 and one end of the capacitor C10. The other end of the capacitor C10 and the other end of the capacitor C11 are both grounded. The 25th and 26th pins of the chip U1 are connected to the battery voltage acquisition circuit.

[0007] The hydrogen concentration detection circuit includes a JXM_H2 hydrogen concentration detection module J8, a resistor R23, and a transistor Q5, wherein pin 1 of the hydrogen concentration detection module J8 is grounded, and pins 2 and 3 of the hydrogen concentration detection module J8 are respectively connected to pins 5 and 6 of the chip U1; pin 4 of the hydrogen concentration detection module J8 is connected to the collector of the transistor Q5, and the emitter of the transistor Q5 is connected to pin 40 of the chip U1; the base of the transistor Q5 is connected to one end of the resistor R23, and the other end of the resistor R23 is connected to pin 7 of the chip U1.

[0008] Furthermore, the crystal oscillator X1 is a 32.768KHZ crystal oscillator; the transistor Q5 model is MMBTSB1197R.

[0009] Furthermore, the battery voltage acquisition circuit includes a resistor R11 and a resistor R12, one end of the resistor R11 is connected to pin 25 of the chip U1, one end of the resistor R12 is connected to pin 26 of the chip U1, and the other end of the resistor R11 and the other end of the resistor R12 are both grounded.

[0010] Furthermore, the resistors R11 and R12 are both 2MΩ, the resistor R23 is 1KΩ; and the capacitors C10 and C11 are both 22pF.

[0011] Furthermore, the communication circuit adopts an NB-IoT module, and the NB-IoT module is connected to the host computer through the operator's public network.

[0012] Furthermore, the power supply circuit includes diodes D4 and J4, wherein the external power supply BAT is connected to pin 2 of J4 and the anode of diode D4, the cathode of diode D4 is connected to pin 40 of chip U1, and pin 1 of J4 is grounded.

[0013] Compared with the prior art, the present invention has the following technical effects:

[0014] The utility model controls other circuits through a controller circuit, collects gas flow through a metering circuit, and opens or closes the gas meter through a valve circuit; detects the hydrogen concentration of the gas meter through a hydrogen concentration detection circuit, and provides the above information to the gas company's collection and management system through a communication module; it solves the problem that traditional gas meters are unable to obtain the proportion of hydrogen content in the measured gas under the current trend of hydrogen admixture in gas pipelines. By detecting the hydrogen concentration in the gas flowing through the gas meter and reporting it to the gas collection and management system, it provides effective data support for gas companies in trade settlement and user charging. In addition, based on the hydrogen concentration detection of the gas meter, it also effectively guarantees the safety of gas use for residential users, and prevents gas explosion accidents caused by excessively high hydrogen admixture ratios. In addition, the controller module timely controls the opening and closing of the power supply of the hydrogen concentration detection module, effectively saving the overall power consumption of the gas meter. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the overall structural block diagram of the intelligent gas meter controller with gas hydrogen concentration detection function of the utility model;

[0016] Figure 2 is a schematic diagram of the controller circuit.

[0017] Figure 3 It is a schematic diagram of the hydrogen concentration detection circuit.

[0018] Figure 4 It is a schematic diagram of the power supply circuit. DETAILED DESCRIPTION

[0019] It should be noted that, unless otherwise specified, all components in the present invention are components known in the prior art.

[0020] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent modifications made on the basis of the technical solution of this application fall within the scope of protection of the present invention.

[0021] like Figure 1 As shown, the intelligent gas meter controller with gas hydrogen concentration detection provided by the utility model includes a controller circuit, and a valve circuit, a liquid crystal display circuit, a hydrogen concentration detection circuit, a communication circuit, a metering circuit and a power supply circuit connected to the controller circuit; wherein:

[0022] The valve circuit is used to receive the switch valve signal from the controller circuit and drive the gas meter valve to open or close;

[0023] The liquid crystal display circuit is used to display various information required to be displayed on the gas meter, such as valve status, communication status, equipment number, real-time hydrogen concentration information, etc.

[0024] The hydrogen concentration detection circuit is used to detect the hydrogen concentration in the gas flowing through the gas meter and provide it to the controller circuit;

[0025] The communication circuit is used for data communication between the controller circuit and the host computer (gas company collection and management system);

[0026] The metering circuit module is used to shape the real-time pulse signal of the gas meter and provide it to the controller circuit;

[0027] The power supply circuit is used to supply power to the controller circuit;

[0028] The controller circuit is used to receive the hydrogen concentration data detected by the hydrogen concentration detection circuit and the voltage data detected by the metering circuit, and send the above data to the host computer through the communication circuit; at the same time, it receives instructions from the host computer, controls the valve circuit and the liquid crystal display circuit to realize real-time remote control of the valve circuit switch or information display; the controller circuit is also used to preset the collection cycle, control the hydrogen concentration detection circuit to collect data according to the preset collection cycle, and control the communication circuit to report data to the host computer at preset intervals.

[0029] The above settings allow gas companies to promptly monitor gas usage and make billing and settlement decisions for residential users. If a user is in arrears, the controller can remotely close the valve on the residential user's gas meter. The valve can also be opened promptly after the user pays. Furthermore, the controller circuit collects hydrogen concentration from the gas meter, resolving the issue of traditional gas meters being unable to determine the percentage of hydrogen in the measured gas given the current trend of hydrogen addition in gas pipelines. By detecting the hydrogen concentration in the gas flowing through the gas meter and reporting it to the gas collection and management system, the gas company provides effective data support for trade settlements and user billing.

[0030] As a preferred solution, Figure 2 As shown, the controller circuit includes a chip U1, a capacitor C10, a capacitor C11, a crystal oscillator X1, and a battery voltage acquisition circuit, wherein the chip U1 adopts the FM33LC025N single-chip microcomputer, which has excellent performance, low power consumption in sleep mode, high-speed communication, long service life, and convenient maintenance. The 36th pin of the chip U1 is connected to one end of the crystal oscillator X1 and one end of the capacitor C11, and the 37th pin of the chip U1 is connected to the other end of the crystal oscillator X1 and one end of the capacitor C10. The other end of the capacitor C10 and the other end of the capacitor C11 are both grounded. The 25th and 26th pins of the chip U1 are connected to the battery voltage acquisition circuit. Preferably, the battery voltage acquisition circuit uses two 2M resistors R11 and R12 for voltage division, wherein one end of the resistor R11 is connected to the 25th pin of the chip U1, one end of the resistor R12 is connected to the 26th pin of the chip U1, and the other end of the resistor R11 and the other end of the resistor R12 are both grounded. Among them, the crystal oscillator X1 is a 32.768KHZ crystal oscillator, and the capacitors C10 and C11 are both 22pF.

[0031] As a preferred solution, the hydrogen concentration detection circuit and the controller circuit use a standard UART interface for data exchange, and the communication interface operation is simple, fast and efficient. Figure 3As shown, the hydrogen concentration detection circuit includes the JXM_H2 hydrogen concentration detection module J8, resistor R23, and transistor Q5. The selected hydrogen concentration detection module J8 has high accuracy, with an accuracy level of 3%, and low power consumption of less than or equal to 0.2W. As a preferred solution, the hydrogen concentration detection module J8 adopts a catalytic combustion method and communicates with the controller circuit using a serial TTL method. Specifically, pin 1 of the hydrogen concentration detection module J8 is grounded, and pins 2 (H2_TX0) and 3 (H2_RX0) of the hydrogen concentration detection module J8 are connected to pins 5 and 6 of the chip U1, respectively, for hydrogen concentration detection data acquisition. Pin 4 (H2_VCC) of the hydrogen concentration detection module J8 is connected to the collector of transistor Q5, and the emitter of transistor Q5 is connected to pin 40 (VCC) of chip U1; the base of transistor Q5 is connected to one end of resistor R23, and the other end of resistor R23 is connected to pin 7 (H2_CTL) of chip U1; specifically, the model of transistor Q5 is MMBTSB1197R, and the resistor R23 is 1KΩ.

[0032] As a preferred solution, the communication circuit uses an NB-IoT module, which is connected to the host computer (gas company collection and management system) through the operator's public network. The NB-IoT module is specifically connected to pins 3 and 4 of chip U1.

[0033] like Figure 4 As shown, the power circuit includes diode D4 and power interface socket J4. The external power supply BAT is connected to pin 2 of J4 and the anode of diode D4. The cathode of diode D4 is connected to pin 40 (VCC) of chip U1. Pin 1 of power interface socket J4 is grounded. The voltage of power interface socket J4 is stepped down by diode D4 and supplied to chip U1.

[0034] The liquid crystal display circuit and the valve circuit adopt the liquid crystal display circuit and the valve circuit commonly used in this field.

[0035] The working process of this utility model is as follows:

[0036] The controller circuit detects hydrogen concentration data from the user's gas usage by acquiring data from the hydrogen concentration detection module built into the gas meter. It also simultaneously collects gas flow data through the metering circuit and regularly reports it to the gas company's collection and management system via the communication circuit. The collection and management system compares the data using preset thresholds. If excessive hydrogen is present in the gas, the system issues an alarm and remotely issues an automatic valve closure command to the controller circuit via the communication circuit to avoid danger. Furthermore, the gas company can adjust its settlement method based on the hydrogen concentration detection data obtained by this utility model, making settlement more reasonable and fair in the context of hydrogen-admixed gas.

Claims

1. An intelligent gas meter controller with gas hydrogen concentration detection, comprising a controller circuit and a valve circuit, a liquid crystal display circuit, a communication circuit and a power supply circuit connected to the controller circuit, characterized in that: It also includes a hydrogen concentration detection circuit and a metering circuit connected to the controller circuit; The controller circuit includes a chip U1, a capacitor C10, a capacitor C11, a crystal oscillator X1, and a battery voltage acquisition circuit. The chip U1 uses an FM33LC025N single-chip microcomputer. The 36th pin of the chip U1 is connected to one end of the crystal oscillator X1 and one end of the capacitor C11. The 37th pin of the chip U1 is connected to the other end of the crystal oscillator X1 and one end of the capacitor C10. The other end of the capacitor C10 and the other end of the capacitor C11 are both grounded. The 25th and 26th pins of the chip U1 are connected to the battery voltage acquisition circuit. The hydrogen concentration detection circuit includes a JXM_H2 hydrogen concentration detection module J8, a resistor R23, and a transistor Q5, wherein pin 1 of the hydrogen concentration detection module J8 is grounded, and pins 2 and 3 of the hydrogen concentration detection module J8 are respectively connected to pins 5 and 6 of the chip U1; pin 4 of the hydrogen concentration detection module J8 is connected to the collector of the transistor Q5, and the emitter of the transistor Q5 is connected to pin 40 of the chip U1; the base of the transistor Q5 is connected to one end of the resistor R23, and the other end of the resistor R23 is connected to pin 7 of the chip U1.

2. The intelligent gas meter controller with gas hydrogen concentration detection according to claim 1, characterized in that: The crystal oscillator X1 is a 32.768KHZ crystal oscillator; the transistor Q5 model is MMBTSB1197R.

3. The intelligent gas meter controller with gas hydrogen concentration detection according to claim 1, characterized in that: The battery voltage acquisition circuit includes a resistor R11 and a resistor R12. One end of the resistor R11 is connected to the 25th pin of the chip U1. One end of the resistor R12 is connected to the 26th pin of the chip U1. The other ends of the resistors R11 and R12 are both grounded.

4. The intelligent gas meter controller with gas hydrogen concentration detection function according to claim 2, characterized in that: The resistors R11 and R12 are both 2M, and the resistor R23 is 1KΩ; the capacitors C10 and C11 are both 22pF.

5. The intelligent gas meter controller with gas hydrogen concentration detection function according to claim 1, characterized in that: The communication circuit adopts the NB-IoT module, and the NB-IoT module is connected to the host computer through the operator's public network.

6. The intelligent gas meter controller with gas hydrogen concentration detection function according to claim 1, characterized in that: The power supply circuit includes diodes D4 and J4, wherein the external power supply BAT is connected to pin 2 of J4 and the anode of diode D4, the cathode of diode D4 is connected to pin 40 of chip U1, and pin 1 of J4 is grounded.

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