A micro-leakage detection intelligent membrane gas meter device board and method

Abstract

The present invention provides a micro-leak detection intelligent diaphragm gas meter device board and method, which detects the rotation angle of the gear in the metering chamber; calculates the flow change value of the gas based on the rotation angle of the gear; determines whether the flow change value of the gas exceeds the standard flow value; and generates an alarm message when the flow change of the gas exceeds the standard flow value. The present invention provides an intelligent gas meter that accurately identifies small amounts of gas, determines whether there is a leak and normal usage, and issues an alarm in time. It has a low-power design and is an intelligent terminal device that integrates metering, monitoring, and alarming. It is suitable for civil and industrial gas types and improves timeliness. It reduces the serious consequences and even the loss of life and property caused by the failure to detect gas leaks in time.

Description

Technical Field

[0001] The present invention relates to the technical field of gas equipment monitoring, and in particular to a device plate and method for a micro-leak detection intelligent membrane gas meter. Background Art

[0002] At present, the national gas industry is developing rapidly. Liquefied gas, natural gas, coal-to-gas and other gases have been widely used in industry and commerce as clean energy. As a new type of energy, its popularization and application have undoubtedly played a huge role in improving the environmental quality of cities. However, with its widespread application, improper use or leakage of these gases will be harmful to health, easy to explode, and there are many hidden dangers and accidents. If the gas leak cannot be discovered and handled in time, it will bring catastrophic harm to society and residents, which to some extent increases the insecurity and instability of the city. For the petroleum, chemical, coal, metallurgy, gas, coking and other industries that widely use gas, any place that produces, stores and uses flammable and explosive materials urgently needs an all-weather, multi-directional monitoring system to ensure the safety of people, production and property.

[0003] The existing smart gas meters cannot accurately detect small leaks and gas usage. The frequency of inspection by gas company inspectors is low. This can easily lead to failure to detect leaks in time. Once a leak is found, it can easily cause unimaginable accidents, resulting in serious damage to people's lives and property. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a micro-leak detection intelligent diaphragm gas meter device board and method, aiming to solve the technical problems in the prior art such as insufficient recognition accuracy of micro-leakage and gas use.

[0005] A micro-leakage detection intelligent membrane gas meter device board, comprising:

[0006] The gear is arranged in the metering chamber and driven to rotate by the metering chamber. One rotation of the gear is one metering unit.

[0007] An angle sensor, arranged corresponding to the central axis of the gear, for detecting the rotation angle of the gear;

[0008] A calculation module, connected to the angle sensor, for calculating the flow change value of the gas based on the rotation angle of the gear;

[0009] A first judgment module, connected to the calculation module, is used to judge whether the flow change value of the gas exceeds the standard flow value;

[0010] The alarm module is connected to the first judgment module and is used to generate an alarm message when the flow rate change of the gas exceeds the standard flow rate value.

[0011] Further, including:

[0012] A first magnet is fixed on the gear, and the first magnet rotates with the rotation of the gear and rotates around the central axis of the gear;

[0013] A magnetic sensor, arranged corresponding to the first magnet, and used for sensing the magnetic field of the first magnet;

[0014] A recording module, connected to the magnetic sensor, for recording as a pulse signal when the magnetic field intensity sensed by the magnetic sensor exceeds a preset intensity;

[0015] A second judgment module, connected to the recording module, is used to judge whether a pulse signal is detected within a unit time;

[0016] The starting module is connected to the second judgment module and the angle sensor respectively, and is used to start the angle sensor when no pulse signal is detected within a unit time.

[0017] Furthermore, two first magnets are fixed on the gear, and the two first magnets are symmetrically arranged with respect to the central axis;

[0018] The unit time is half a rotation period of the gear in normal rotation.

[0019] Further, the starting module turns on the angle sensor every first preset time period and turns on the angle sensor every second preset time period.

[0020] Furthermore, it also includes: a communication mainboard, which is arranged in front of the gear;

[0021] The magnetic sensor, the angle sensor, the calculation module, the recording module, the first judgment module, the alarm module, the second judgment module and the start module are all arranged on the communication mainboard.

[0022] Furthermore, a wireless transmission module is also provided on the communication main board, connected to the calculation module, for sending the rotation angle of the gear and the flow change value of the gas to an external terminal.

[0023] A method for micro-leak detection of an intelligent membrane gas meter, using the aforementioned micro-leak detection intelligent gas meter device board, comprises the following steps:

[0024] Step A1, the angle sensor detects the rotation angle of the gear, the gear is driven to rotate by the metering chamber, and each rotation of the gear is a metering unit;

[0025] Step A2, calculating the flow change value of the gas based on the rotation angle of the gear;

[0026] Step A3, determine whether the gas flow rate change value exceeds the standard flow rate value:

[0027] If yes, proceed to step A4;

[0028] If not, return to step A1;

[0029] Step A4: generate alarm information.

[0030] Furthermore, a first magnet is fixed on the gear, and the first magnet rotates with the rotation of the gear and rotates around the central axis of the gear; a magnetic sensor is arranged corresponding to the first magnet, and is used to detect a pulse signal when the first magnet rotates to a relative position with the magnetic sensor;

[0031] Before step A1, the method further includes the following steps:

[0032] Step B1, the magnetic sensor senses the magnetic field of the first magnet when the gear is rotating;

[0033] Step B2, recording the magnetic field intensity sensed by the magnetic sensor exceeding a preset intensity as a pulse signal;

[0034] Step B3, determine whether a pulse signal is detected within a unit time:

[0035] If yes, return to step B1;

[0036] If not, proceed to step B4;

[0037] Step B4, turn on the angle sensor.

[0038] Further, in step B4, the angle sensor is turned on every first preset time period, and the angle sensor is turned on every second preset time period.

[0039] Furthermore, after step A4, the following steps are further included:

[0040] Step A5, sending the rotation angle of the gear and the change value of the gas flow rate to an external terminal.

[0041] The beneficial technical effect of the present invention is that: by setting an angle sensor, a smart gas meter is provided which can accurately identify small amounts of gas, judge whether there is a gas leak or normal usage, and give an alarm in time. The smart terminal device has a low power consumption design and integrates metering, monitoring and alarm. It is suitable for civil and industrial gas, and improves timeliness. It reduces the serious consequences and even the loss of life and property caused by the failure to find gas leaks in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a structural schematic diagram of a micro-leakage detection intelligent membrane gas meter device board of the present invention;

[0043] Figure 2 This is a front structural schematic diagram of a device plate of a micro-leak detection intelligent membrane gas meter of the present invention;

[0044] Figure 3 A schematic diagram of a module of a micro-leakage detection intelligent membrane gas meter device board of the present invention;

[0045] Figure 4 A flowchart of the steps of a method for micro-leakage detection of an intelligent membrane gas meter according to the present invention;

[0046] Figure 5 A flowchart of the steps of a method for micro-leakage detection of an intelligent membrane gas meter according to the present invention;

[0047] in,

[0048] 1- Gear;

[0049] 2- first magnet;

[0050] 3- Magnetic sensor;

[0051] 4- Angle sensor;

[0052] 5-Integrated chip;

[0053] 6- Alarm module;

[0054] 7- Wireless transmission module;

[0055] 8-Communication mainboard; DETAILED DESCRIPTION

[0056] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0057] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0058] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0059] See also Figure 1-3 The present invention provides a micro-leakage detection intelligent membrane gas meter device board, comprising:

[0060] A gear (1) is arranged in the metering chamber and driven to rotate by the metering chamber, and each rotation of the gear is a metering unit;

[0061] An angle sensor (4), arranged corresponding to the central axis of the gear, for detecting the rotation angle of the gear;

[0062] A calculation module (501), connected to the angle sensor, for calculating a flow change value of the gas based on a rotation angle of the gear;

[0063] A first judgment module (502), connected to the calculation module (501), is used to judge whether the flow rate change value of the gas exceeds the standard flow rate value;

[0064] The alarm module (6) is connected to the first judgment module (502) and is used to generate an alarm message when the flow rate change of the gas exceeds the standard flow rate value.

[0065] Further, including:

[0066] A first magnet (2) is fixed on the gear (1), and the first magnet (2) rotates along with the rotation of the gear and rotates around the central axis of the gear;

[0067] A magnetic sensor (3), arranged corresponding to the first magnet (2), and used for sensing the magnetic field of the first magnet (2);

[0068] A recording module (503), connected to the magnetic sensor (3), for recording as a pulse signal when the magnetic field intensity sensed by the magnetic sensor (3) exceeds a preset intensity;

[0069] A second judgment module (504), connected to the recording module (503), is used to judge whether a pulse signal is detected within a unit time;

[0070] The start-up module (505) is connected to the second judgment module (504) and the angle sensor (4) respectively, and is used to start the angle sensor (4) when no pulse signal is detected within a unit time.

[0071] Furthermore, two first magnets (2) are fixed on the gear (1), and the two first magnets (2) are symmetrically arranged with respect to the central axis;

[0072] The unit time is half a rotation period of the gear (1) during normal rotation.

[0073] Furthermore, the start module (505) turns on the angle sensor (4) every first preset time period, and turns on the angle sensor (4) every second preset time period.

[0074] Furthermore, it also includes: a communication mainboard (8), which is arranged in front of the gear;

[0075] The magnetic sensor, the angle sensor, the calculation module, the first judgment module, the alarm module, the recording module, the second judgment module and the start module are all arranged on the communication mainboard.

[0076] The calculation module, the first judgment module, the alarm module, the recording module, the second judgment module and the start module are integrated together to form an integrated chip (5) which is arranged on a communication mainboard.

[0077] Furthermore, a wireless transmission module (7) is also provided on the communication main board (8), connected to the calculation module (501), and used for sending the rotation angle of the gear and the flow change value of the gas to an external terminal.

[0078] The wireless transmission module (7) is also arranged on the communication main board (8).

[0079] Specifically, in the present invention, the first magnet (2) is mounted on the gear (1). Preferably, two first magnets (2) and the centers of the two first magnets and the gear form a straight line.

[0080] When the user uses gas, the metering chamber inside the base meter drives the gear to rotate. When the gear is driven by the metering chamber, the first magnet fixed to the gear rotates. The magnetic sensor is used to detect the change in the magnetic field caused by the first magnet rotating with the gear. When the first magnet rotates to face the magnetic sensor, the magnetic field intensity detected by the magnetic sensor is the strongest, and a pulse signal, i.e. a square wave signal, is recorded. By recording the number of square wave signals per unit time, the speed of the gear can be measured, and the flow rate can be further obtained.

[0081] When there are two first magnets on the gear, the magnetic sensor will be opposite to one of the first magnets every time the gear rotates half a circle, generating a square wave signal. When the gear rotates one circle, the magnetic sensor will record two square wave signals, that is, the magnetic sensor will output two complete square wave signals in one rotation cycle of the gear. At this time, it is recorded as a rotation volume. The rotation volume is, for example, 1.2dm 3 If the magnetic sensor only records a complete square wave signal, it is recorded as half a rotation volume. The gas volume is calculated based on the number of square waves detected. The magnetic sensor is a low-power device that supports dense frequency detection. By recording the number of square wave signals per unit time, the speed of the gear can be measured, and then the gas flow rate can be further calculated. The two first magnets are fixed by the gear, and the square wave signal is obtained every half rotation period for detection.

[0082] Specifically, the angle sensor uses a TMR3002 chip. A second magnet is set corresponding to the TMR3002 chip. The second magnet is located at the center of the gear. The TMR3002 chip is on the communication mainboard. The second magnet rotates based on the rotation of the gear and can generate a magnetic field in any direction parallel to the surface of the TMR3002 chip. The TMR sensor in the TMR3002 chip, i.e., the magnetoresistance effect sensor, is mainly composed of two magnetic layers. One is a "pinned layer" whose magnetization direction is not affected by the external magnetic field, and the other is a "free layer" that receives the external magnetic field and is parallel to the external magnetic field. Due to the tunnel magnetoresistance effect, the resistance value changes with the angle between the pinned layer and the free layer in a sine-cosine relationship. Therefore, when the angle of the external magnetic field changes, the output voltage waveform of the TMR sensor is a sine-cosine curve. The current angle is calculated based on the inverse tangent function. The calculation principle of the angle sensor is common knowledge and need not be elaborated here.

[0083] TMR3002 angle sensor, a highly sensitive and reliable device, can detect 360° angle changes.

[0084] Specifically, when the two second magnets are fixed on the gear, if the magnetic sensor does not detect a square wave signal per unit time, for example, the magnetic sensor does not detect a square wave signal within one hour, it is considered that either the gas leak is smaller or the gas has not leaked. In order to detect whether there is a smaller gas leak at this time, intermittent detection is performed at this time, and the angle sensor is enabled to detect the angle change of the gear at predetermined intervals, for example, the change of the gear angle is detected once every 15 minutes. That is, the power supply module of the angle sensor is turned on at predetermined intervals, the angle sensor is powered, the relative change of the gear angle is detected, and the change of the gas flow rate is calculated according to the change of the gear angle. Compare the standard flow rates of different pipe diameters, the standard flow rate per unit time, for example, the standard flow rate divided into minutes is used as the threshold G, based on the comparison of the monitored gas flow rate per unit time and the standard flow rate, it is judged whether the gas flow rate per unit time is normal. When the data is greater than the threshold, it is considered abnormal, and the emergency alarm mode is immediately enabled.

[0085] In the present invention, the calculation formula of the gas flow is as follows:

[0086] C = rotation volume / 360, the rotation volume is, for example, 1.2 dm 3 , C is the gas volume per 1° rotation.

[0087] Specifically, the present invention includes a Bluetooth communication module, and the user terminal can check the device status at any time by connecting to the Bluetooth communication module (7).

[0088] Specifically, when the data reporting is completed, the gas meter will continue to be detected for several cycles and alarm at a certain period until the maintenance personnel handle the abnormality and eliminate the danger, and cancel the alarm, and then resume the normal metering mode.

[0089] If the square wave signal is not detected within a cycle, the angle sensor is turned on for a period of time to obtain the detection data of the angle sensor, and the gas flow is calculated and compared with the preset threshold. If it exceeds, the alarm module is activated, and the detection data and the calculated gas flow are transmitted to the external data processing platform for reporting. When the user activates the Bluetooth module, the detection data will be sent to the user for reference.

[0090] The present invention provides a micro-leakage detection smart gas meter device board, which can accurately identify the micro-amount of gas, judge whether there is leakage and normal amount, and give an alarm in time by setting an angle sensor to detect the micro-amount of gas. It has a low power consumption design and is an intelligent terminal device integrating metering, monitoring and alarm. It is suitable for civil and industrial gas, and improves timeliness. It reduces the serious consequences and even the loss of life and property caused by the failure to find gas leakage in time.

[0091] Referring to Figure 4, the present invention also provides a method for micro-leakage detection of an intelligent diaphragm gas meter, which uses the aforementioned micro-leakage detection intelligent diaphragm gas meter device board, and includes the following steps:

[0092] Step A1, the angle sensor detects the rotation angle of the gear, the gear is driven to rotate by the metering chamber, and each rotation of the gear is a metering unit;

[0093] Step A2, calculating the flow change value of the gas based on the rotation angle of the gear;

[0094] Step A3, determine whether the gas flow rate change value exceeds the standard flow rate value:

[0095] If yes, proceed to step A4;

[0096] If not, return to step A1;

[0097] Step A4: generate alarm information.

[0098] See also Figure 5 Furthermore, a first magnet is fixed on the gear, and the first magnet rotates with the rotation of the gear and rotates around the central axis of the gear; a magnetic sensor is arranged corresponding to the first magnet, and is used to detect a pulse signal when the first magnet rotates to a relative position with the magnetic sensor;

[0099] Before step A1, the method further includes the following steps:

[0100] Step B1, the magnetic sensor senses the magnetic field of the first magnet when the gear is rotating;

[0101] Step B2, recording the magnetic field intensity sensed by the magnetic sensor exceeding a preset intensity as a pulse signal;

[0102] Step B3, determine whether a pulse signal is detected within a unit time:

[0103] If yes, return to step B1;

[0104] If not, proceed to step B4;

[0105] Step B4, turn on the angle sensor.

[0106] Further, the angle sensor is turned on every first preset time period, and the angle sensor is turned on every second preset time period.

[0107] Furthermore, after step A4, the following steps are further included:

[0108] Step A5, sending the rotation angle of the gear and the change value of the gas flow rate to an external terminal.

[0109] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A micro-leakage detection intelligent membrane gas meter device board, characterized in that: include: A gear is arranged in the metering chamber and driven to rotate by the metering chamber, and each rotation of the gear is a metering unit; An angle sensor, arranged corresponding to the central axis of the gear, for detecting the rotation angle of the gear; A calculation module, connected to the angle sensor, for calculating a flow change value of the gas based on the rotation angle of the gear; A first judgment module, connected to the calculation module, for judging whether the flow change value of the gas exceeds the standard flow value; An alarm module, connected to the first judgment module, for generating an alarm message when the flow rate change of the gas exceeds the standard flow rate value; A first magnet is fixed on the gear, and the first magnet rotates with the gear and rotates around the central axis of the gear; a magnetic sensor, arranged corresponding to the first magnet, and used for sensing the magnetic field of the first magnet; A recording module, connected to the magnetic sensor, for recording as a pulse signal when the magnetic field intensity sensed by the magnetic sensor exceeds a preset intensity; A second judgment module, connected to the recording module, for judging whether the pulse signal is detected within a unit time; A start-up module is connected to the second judgment module and the angle sensor respectively, and is used to start the angle sensor when the pulse signal is not detected within the unit time.

2. A micro-leakage detection intelligent membrane gas meter device board as claimed in claim 1, characterized in that: Two first magnets are fixed on the gear, and the two first magnets are symmetrically arranged with respect to the central axis; The unit time is half a rotation period of the gear during normal rotation.

3. A micro-leakage detection intelligent membrane gas meter device board as claimed in claim 1, characterized in that: The start-up module turns on the angle sensor every first preset time period and turns on the angle sensor every second preset time period.

4. A micro-leakage detection intelligent membrane gas meter device board as claimed in claim 1, characterized in that: Also includes: A communication mainboard, arranged in front of the gear; The magnetic sensor, the angle sensor, the calculation module, the recording module, the first judgment module, the alarm module, the second judgment module, and the start module are all arranged on the communication mainboard.

5. A micro-leakage detection intelligent membrane gas meter device board as claimed in claim 4, characterized in that: A wireless transmission module is also provided on the communication mainboard, connected to the calculation module, and used for sending the rotation angle of the gear and the flow change value of the gas to an external terminal.

6. A method for micro-leakage detection of an intelligent membrane gas meter, characterized in that: Using a micro-leak detection smart gas meter device board as described in any one of claims 1 to 5, comprising the following steps: Step A1, an angle sensor detects the rotation angle of the gear, the gear is driven to rotate by the metering chamber, and each rotation of the gear is a metering unit; Step A2, calculating the flow change value of the gas based on the rotation angle of the gear; Step A3, determining whether the flow rate change value of the gas exceeds the standard flow rate value: If yes, proceed to step A4; If not, return to step A1; Step A4, generating alarm information; A first magnet is also fixed on the gear, and the first magnet rotates along with the rotation of the gear and rotates around the central axis of the gear; a magnetic sensor is arranged corresponding to the first magnet, and is used to detect a pulse signal when the first magnet rotates to a relative position with the magnetic sensor; Before step A1, the method further includes the following steps: Step B1, the magnetic sensor senses the magnetic field of the first magnet when the gear is rotating; Step B2, recording the magnetic field intensity sensed by the magnetic sensor exceeding a preset intensity as a pulse signal; Step B3, determining whether the pulse signal is detected within a unit time: If yes, return to step B1; If not, proceed to step B4; Step B4, turning on the angle sensor.

7. A method for micro-leakage detection of an intelligent membrane gas meter as claimed in claim 6, characterized in that: In the step B4, the angle sensor is turned on every first preset time period, and the angle sensor is turned on every second preset time period.

8. A method for micro-leakage detection of an intelligent membrane gas meter as claimed in claim 6, characterized in that: After step A4, the following steps are further included: Step A5, sending the rotation angle of the gear and the flow change value of the gas to an external terminal.

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