CN112525277B

CN112525277B - Gas meter with gas theft prevention function, gas theft prevention method and gas management system

Info

Publication number: CN112525277B
Application number: CN202011333582.7A
Authority: CN
Inventors: 姚婵娟; 李良; 谭巍; 舒杰; 陈博文; 熊杰
Original assignee: CHONGQING SHANCHENG GAS EQUIPMENT CO LTD
Current assignee: CHONGQING SHANCHENG GAS EQUIPMENT CO LTD
Priority date: 2020-11-24
Filing date: 2020-11-24
Publication date: 2024-05-17
Anticipated expiration: 2040-11-24
Also published as: CN112525277A

Abstract

The application discloses a gas meter with a gas theft prevention function, a gas theft prevention method and a gas management system, wherein the gas meter comprises a trigger device, a sensing device and a valve control device, the trigger device is arranged on the inner side of a gas meter cover and used for sending out a trigger medium, the sensing device is arranged in the gas meter, the installation position of the sensing device is positioned in the trigger range of the trigger medium, the sensing device is used for changing the on-off state of the sensing device by responding to the trigger medium, and the valve control device is connected with the sensing device and used for acquiring the on-off state of the sensing device and controlling the gas meter valve to be closed when the on-off state changes. The triggering device and the sensing device are arranged to respond to the electric signal representing the physical change according to the physical change generated by the user on the meter cover, the behavior that the user changes the gas meter privately is detected, and the corresponding gas valve closing action is implemented on the electric signal through the valve control device, so that the safety accident caused by the user is avoided.

Description

Gas meter with gas theft prevention function, gas theft prevention method and gas management system

Technical Field

The application relates to the technical field of gas meter structures, in particular to a gas meter with a gas theft prevention function, a gas theft prevention method and a gas management system.

Background

With the increasing living demands of urban construction residents, urban gas application technology rapidly develops, and under the guidance of national policies such as town, gas change from coal to gas, gas for vehicles and the like, large cities nationwide encourage support of gas industry, and gas is one of the energy sources widely applied in human society. The fuel gas can form complementary advantages with renewable energy sources, the utilization scale of the fuel gas is enlarged, the specific gravity of clean energy application is improved, and the application of the fuel gas becomes a necessary way for the modern energy system in China to be transformed into clean, low-carbon, safe and efficient energy systems. The continuous improvement of the gas production and consumption meets the social development requirement of China, greatly promotes the economic development of China and improves the life quality of residents.

With the continuous increase of the number of the gas users, the high-risk characteristics of inflammability and explosiveness of the gas are gradually revealed, and the accidents such as gas explosion and poisoning caused by various reasons are more and more, so that the safety of the public and the personal property loss are greatly influenced, and the personal safety of the gas users and the healthy development of the whole gas industry are seriously threatened. Among all household gas safety accidents, the gas safety accidents caused by gas theft of the user frequently occur, and when the gas is stolen, the user can privately change pipeline equipment and privately change a gas meter, and the gas theft behavior is implemented by privately connecting the self-use gas equipment on the gas pipeline, interfering or stirring the readings of the idler wheels of the gas meter by other tools, and the like, so that the gas leakage is extremely easy to form in the gas theft process, thereby causing the safety accidents such as explosion, and the like. Therefore, how to find, prevent and avoid the problem to be solved currently when users change the gas meter in a private way in advance.

Disclosure of Invention

Based on the method, in order to timely detect and identify the user private change gas meter and the interference gas meter counting, and timely prevent the user private change gas meter and the interference gas meter counting, timely eliminate potential safety hazards and avoid causing safety accidents, the internal composition and the use method of the gas meter are improved, and the behavior of detecting and identifying the user private change gas meter by detecting whether the gas meter cover is detached or not is realized.

On the one hand, the application provides a gas meter with a gas theft prevention function, which comprises:

the trigger device is arranged on the inner side of the gas meter cover and is used for sending out a trigger medium;

The sensing device is arranged in the gas meter, the installation position of the sensing device is positioned in the triggering range of the triggering medium, and the sensing device changes the on-off state of the sensing device by responding to the triggering medium;

And the valve control device is connected with the sensing device and is used for acquiring the on-off state of the sensing device and controlling the gas meter valve to be closed when the on-off state changes.

In another aspect, the present application provides a method for preventing gas theft for a gas meter, comprising the steps of:

The sensing device arranged in the gas meter changes the on-off state of the sensing device by responding to the triggering medium sent by the triggering device arranged on the inner side of the gas meter cover;

The valve control device connected with the sensing device acquires the on-off state of the sensing device and controls the gas meter valve to be closed when the on-off state changes; wherein,

The installation position of the sensing device is positioned in the triggering range of the triggering medium.

In still another aspect, the application provides a gas management system with a gas theft prevention function, which comprises a background management end and at least one gas meter; wherein, the gas table includes:

According to the gas meter with the gas theft prevention function, the gas theft prevention method and the gas management system disclosed by the application, the triggering device and the sensing device are arranged to respond to the electric signal representing the physical change according to the physical change generated by the user on the meter cover, the behavior of the user in privacy changing the gas meter is detected, and the corresponding gas valve closing action is implemented on the electric signal through the valve control device, so that the user is prevented from further completing the implementation of the gas theft behavior, and the safety accident caused by the user is avoided.

Drawings

The embodiments described below with reference to the drawings are exemplary and intended to illustrate and describe the application and should not be construed as limiting the scope of the application.

FIG. 1 is a schematic diagram of the overall structure of a gas meter when a meter cover and a housing cover are covered in an embodiment of the gas meter of the application.

FIG. 2 is a schematic diagram of the overall structure of the gas meter when the cover is separated from the casing in the embodiment of the gas meter according to the application.

FIG. 3 is a schematic diagram of a valve control device in series with each sensing device in an embodiment of the gas meter of the present application.

FIG. 4 is a schematic diagram of a valve control device in parallel with each sensing device in an embodiment of the gas meter of the present application.

Fig. 5 is a schematic diagram of the positional relationship between the conducting member and the cover-removing contact when the cover and the housing are closed in the embodiment of the gas meter of the application.

FIG. 6 is a schematic diagram of the relationship between the conducting member and the cover-removing contact when the cover is separated from the housing in an embodiment of the gas meter of the application.

FIG. 7 is a schematic flow chart of an embodiment of the method for preventing gas theft according to the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application become more apparent, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the embodiments of the present application.

Embodiments of the gas meter with anti-theft function disclosed in the present application are described in detail below with reference to fig. 1 to 6. As shown in fig. 1 and 2, the gas meter disclosed in this embodiment mainly includes: triggering device, induction system and valve controlling means.

The gas meter generally has a housing provided with a meter cover that can be opened manually by a tool, a structure (not shown in the drawings) for circulating gas and measuring gas, such as a metering box, a roller counter, etc., and a gas inlet and a gas outlet (not shown in the drawings).

The triggering device is arranged on the inner side of the gas meter cover and is arranged towards the gas meter and used for sending out a triggering medium to the inside of the gas meter.

Referring specifically to fig. 1, the sensing device is installed in the gas meter and is configured to receive a triggering medium sent by the triggering device. The installation position of the sensing device is positioned in the triggering range of the triggering medium, so that the sensing device can smoothly respond to the triggering medium when the gas meter normally works, and the sensing device changes the on-off state of the sensing device by responding to the triggering medium. Specifically, if the sensing device senses the trigger medium at a certain moment, the on-off state of the sensing device is changed from off to on or from on to off at the moment due to the sensing of the trigger medium, and if the sensing device continuously senses the trigger medium, the sensing device continuously keeps the changed on or continuously keeps the changed off from the moment; if the sensing device fails to sense the triggering medium at a certain moment, the sensing device can change the on-off state of the sensing device due to the fact that the sensing device does not sense the triggering medium, and the sensing device is changed into a state different from the state when the triggering medium is sensed.

It will be appreciated that a change in the relative position of the trigger device to the sensing device due to a minimal external influence, such as a slight vibration, on the gas meter will not cause the sensing device to fall outside the area where the trigger medium can be sensed, so that the sensing device will not be unable to respond to the trigger medium because the gas meter is subjected to a slight vibration.

The valve control device is connected with the sensing device and is used for acquiring the on-off state of the sensing device and controlling the gas meter valve to be closed when the on-off state changes. Referring to fig. 2 specifically, if a user disassembles or breaks or opens the cover of the gas meter or breaks the structure of the gas meter, the trigger device located on the cover and the sensor device located in the meter will change significantly relative positions, the sensor device will deviate from the range of the area where the trigger medium can be sensed due to the movement of the cover or the damage of the trigger device, and the on-off state of the sensor device will not normally respond to the trigger medium, so that the sensor device will change from on to off state due to the fact that the sensor device senses the trigger medium, and an open circuit will be formed.

The triggering device and the sensing device are arranged to respond to the electric signal representing the physical change according to the physical change generated by the user on the meter cover, the behavior that the user changes the gas meter privately is detected, and the corresponding gas valve closing action is implemented on the electric signal through the valve control device, so that the user is prevented from further completing the implementation of the gas stealing behavior, and the safety accident caused by the user is avoided.

In one embodiment, the triggering device employs a magnet, such as a permanent magnet or an antiferromagnetic, and the type of triggering medium emitted by the triggering device is magnetic. The sensing device adopts a magneto-sensitive sensor, such as a Hall element, a magnetic reed switch and the like, and the triggering range is the effective magnetic field range relative to the sensing device. Specifically, the magnet is fixed to the inner side of the gas meter cover, and may be directly fixed to the surface of the inner side of the meter cover, or may be a magnet portion which is embedded in the meter cover and exposed to the outside of the inner side and is capable of emitting a sufficient magnetic field. The Hall element and the circuit board thereof are arranged in the gas meter and are positioned right below the magnet. The Hall element is in a conducting state when the meter cover is completely covered by utilizing the Hall effect, and the valve control device judges that the meter cover is not changed; when the meter cover is changed from on state to off state by private change, the valve control device judges that the meter cover is changed by private change of a user, and then the gas valve is turned off.

In one embodiment, the triggering device employs a compression member, such as a square press block, a cylindrical press column, or the like. The sensing device adopts a force-sensitive sensor, such as a strain gauge circuit and the like. The type of the triggering medium sent by the triggering device is force medium, and the triggering range is effective pressing distance relative to the sensing device. Specifically, the square pressing block is fixed on the inner side of the gas meter cover and extends to the inside of the gas meter, and can be directly fixed on the surface of the inner side of the meter cover. The strain gauge is arranged in the gas meter and is positioned right below the square pressing block. When the watch cover is covered well, the square pressing block just presses the strain gauge when the watch cover is covered, so that the resistance of the strain gauge is increased due to the piezoresistance effect, and a strain gauge circuit is in an off state; when the meter cover is changed by privacy and opened, the square pressing block does not press the strain gauge any more along with the movement of the meter cover, the resistance of the strain gauge is reduced, the strain gauge circuit is changed from an off state to an on state, and the valve control device judges that the meter cover is changed by privacy of a user and then turns off the gas valve.

In one embodiment, the triggering device employs a metal insert, such as a strip of copper sheet or the like. The sensing device employs a switching electronics component with a slot thereon that mates with a metal insert, such as a stationary end in a single pole single throw switch. The type of the triggering medium emitted by the triggering device is electronic medium, and the triggering range is the effective switching-on distance relative to the sensing device. Specifically, the strip copper sheet is fixed on the inner side of the gas meter cover and extends to the inside of the gas meter. The switch electronic element is arranged in the gas meter, and the slot arranged on the switch electronic element is positioned right below the strip-shaped copper sheet. When the meter cover is covered well, the strip-shaped copper sheets are just inserted into the slots when the meter cover is covered, so that the circuits on the two sides of the fixed end are conducted, and the switch electronic element is in a conducting state; when the meter cover is changed by privacy and opened, the strip-shaped copper sheets are separated from the slots along with the movement of the meter cover, so that the circuits on the two sides of the fixed end are disconnected due to the physical distance, the switch electronic element is changed from a conducting state to a disconnecting state, and the valve control device judges that the meter cover is changed by privacy of a user and then the gas valve is turned off.

In order to detect, record and evidence retention of the disturbing behaviour when a user is disturbing the counting of a gas metering structure such as a wheel counter of a gas meter by means of a highly magnetic magnet, in one embodiment at least one non-magnetized permanent magnet is mounted on the gas meter housing. Referring to fig. 1 and 2 specifically, if a user performs reading interference on a high-magnetic magnet near a gas meter, the permanent magnet is magnetized, and a magnetization state is still kept for a long time after the high-magnetic magnet is far away from the gas meter, when a worker checks the gas meter, the permanent magnet is detected by an instrument such as a magnetometer, if the magnetization state is found, the user is indicated to approach the gas meter by the magnet, so the gas meter can be used as detection, recording and evidence retention of gas stealing behavior. It will be appreciated that the permanent magnet may be removably mounted on the exterior surface of the gas meter housing for replacement with a new non-magnetized permanent magnet after magnetization is detected, enabling continued detection of a user's theft.

In addition, in order to directly avoid the user from counting and interfering with the gas metering structure such as the roller counter of the gas meter through the high magnetic magnet and prevent the successful implementation of interference actions, in one embodiment, the housing and the meter cover of the gas meter are provided with electromagnetic shielding layers, and the electromagnetic shielding layers can adopt shielding films and metal shielding nets which are built in the housing and the meter cover, and can also adopt electromagnetic shielding coating materials which are laid on the surfaces of the housing and the meter cover, so as to avoid the influence on the operation of the internal mechanism of the gas meter when the user places the high magnetic magnet at a position close to the gas meter.

It should be noted that, the electromagnetic shielding layer and the non-magnetized permanent magnet are alternatively used, and cannot be set at the same time, so that the two countermeasures for the user to interfere with the reading behavior of the counter can only be alternatively used.

In one embodiment, the gas meter is provided with a plurality of meter covers, for example, a plurality of detachable covers including an upper cover, a lower cover and the like, and the triggering device is arranged on at least one meter cover, and a corresponding number of sensing devices are arranged in the gas meter, and the triggering devices are in one-to-one correspondence with the sensing devices, so that when any meter cover is opened, the corresponding sensing devices sense and break. When the trigger device and the sensing device are provided with a plurality of trigger media, the trigger media adopted by each trigger device can be not identical, for example, one group of trigger devices and sensing devices of the gas meter adopts a magnet to match with a magneto-sensitive sensor, the other group of trigger devices and sensing devices adopts a correlation photoelectric switch, and in order to save space, each trigger device can be embedded in the meter cover.

Specifically, a plurality of triggering devices and a plurality of sensing devices can be installed in the gas meter, the gas meter comprises at least one valve control device, and the at least one valve control device is respectively connected with the sensing devices. The valve control device can be provided with a plurality of sensors and is respectively connected with each sensor, the trigger device, the sensors and the valve control device are in one-to-one correspondence, and each valve control device can control the gas valve to be turned off.

Further, the gas meter only comprises one valve control device, but the number of the triggering devices and the sensing devices is multiple, for example, n. At this time, the connection relationship between the sensing devices and the connection relationship between the sensing device group formed by the sensing devices and the valve control device are as follows. First, the sensing device is turned off when responding to the triggering medium, that is, the sensing device is turned off from on when the gas meter is changed, referring to fig. 3, in this case, the valve control device is connected in series with n sensing devices, and any sensing device is turned off to cause the whole sensing device group to be turned off, so that the sensing device is detected by the valve control device. Second, the sensing device is turned on in response to the triggering medium, that is, the sensing device is turned on from off when the gas meter is changed, referring to fig. 4, in this case, the valve control device is connected in parallel with the n sensing devices, and any sensing device turned on will cause the whole sensing device group to be turned on, so that the sensing device is detected by the valve control device.

In order to increase the detection means for the privacy of the user of the gas meter, whether the gas meter is being privacy-changed or not is judged from a plurality of different modes so as to improve the privacy-change recognition rate, in one embodiment, the gas meter further comprises a posture measurement device which is arranged inside the case of the gas meter and is used for measuring the posture change of the gas meter. The attitude measuring means may employ an acceleration sensor, an inclination sensor or an inertial sensor. Referring to fig. 1 and 2, when a user wants to detach the gas meter from the gas pipe privately and connect with a self-service gas device, the gas meter is not required to be moved and shifted when the gas is used or the gas meter structure is changed privately, and in the moving and shifting process, the gas meter is inclined, tilted and the like, and the posture change is detected by a posture measuring device for measuring the posture of the gas meter in real time.

The valve control device is also used for obtaining the measurement result of the attitude measurement device and controlling the gas meter valve to be closed when the measurement result exceeds the set parameter interval. After the current posture of the gas meter is measured by the posture measuring device, the valve control device compares the current posture with a reference parameter corresponding to the measurement parameter dimension of the posture measuring device, for example, the reference parameter is an acceleration parameter for an acceleration sensor, and the reference parameter is an angle parameter for an inclination sensor and an inertia sensor. The following description will be further made by taking a triaxial acceleration sensor as an example, the reference parameter refers to a coordinate when the gas meter is normally located at an installation position, after the gas meter is normally installed, the valve control device records components of an X axis, a Y axis and a Z axis of the triaxial acceleration sensor as reference coordinates, and the set parameter interval is used for judging whether the posture change of the gas meter is significant to the extent that the gas meter can be judged to be moved or moved, if the deviation between the measurement result and the reference result exceeds the set parameter interval, it is indicated that the gas meter is changed by a user and moved in the process, and therefore the valve control device closes the gas valve.

By arranging the gesture measuring device, the behavior of the user for privacy modification of the gas meter is detected and identified from the aspect of gesture movement of the gas meter, and the successful identification rate is further enhanced.

In order to detect and judge earlier in one step when the user carries out gas theft, judge and recognize more timely that the user is carrying out actions such as privacy modification and gas theft, so as to prevent the user and eliminate potential safety hazards more in advance, in one embodiment, the gas meter further comprises a cover removing contact, a conducting piece and a cover removing detection circuit.

The gas meter cover can be fixed in a corresponding area of the gas meter shell in a covering mode, the edge of the meter cover and the edge of the corresponding area of the shell are covered, the fixation of the meter cover is realized, the corresponding area on the shell is called a meter cover covering area, the cover covering area is short for short, and an area of the meter cover matched with the cover covering area is called a joint area. Referring to fig. 5 and 6, at least one recess is provided in the cover region of the gas meter housing, and a cover removing contact is provided in each recess. If the gas meter is provided with only one meter cover, the shell is provided with only one cover area, one or more grooves are arranged on the cover area, and a cover unloading contact is arranged in each groove. If the gas meter is provided with a plurality of meter covers, the housing is provided with a plurality of cover areas, at least one cover area in the plurality of cover areas is provided with cover-unloading contacts positioned in the grooves, and the number of the cover-unloading contacts arranged in the cover area provided with the cover-unloading contacts is at least one, that is, the number of the cover-unloading contacts arranged in each cover area can be unequal. Each of the set cap-removing contacts is Grounded (GND).

The conducting piece is a metal piece and is arranged on the joint area of the gas meter cover, and can be detachably arranged on the meter cover or integrally formed on the meter cover. One end of the conducting piece stretches into the groove of the shell and is electrically connected with the cover-unloading contact when the gas meter cover and the gas meter shell cover are in contact, and the other end of the conducting piece is connected with a power supply (VCC) through a resistor. Specifically, when the watch cover is normally and well covered on the shell, the conducting piece can be just in physical contact with the cover-unloading contact to realize electric conduction, and when the watch cover is dismounted, the conducting piece can be separated from the cover-unloading contact to cause disconnection.

The cover removing detection circuit is provided with an input end which is connected with one end of the conducting piece, which is connected with the power supply. Referring to fig. 5 specifically, when the watch cover is normally and completely covered on the casing, one end of the conducting member is communicated with the cover-unloading contact to realize grounding, so that the cover-unloading detection circuit connected with the other end of the conducting member detects that the input end is at a low level at the moment; when the watch cover is detached, referring to fig. 6, one end of the conducting member is disconnected from the cover detaching contact, the power supply is effective, the cover detaching detection circuit detects that the input end is at high level, and the level change occurs. It can be understood that two ends of the conducting piece can be connected with a capacitor in parallel, and when one end of the conducting piece is disconnected with the cover-unloading contact, the power supply charges the capacitor through the resistor, so that the effect that the cover-unloading detection circuit detects that the input end is at the high level at the moment is also realized. The gas meter can be internally provided with a singlechip system, and the cover-removing detection circuit can adopt singlechip chips such as 89C51 and the like to realize the functions.

The cover-removing detection circuit controls the gas meter valve to be closed when detecting that the level of the input end changes, and can detect the behavior of privacy changing the gas meter of a user earlier, so that potential safety hazards are eliminated immediately when the user does not complete privacy changing the gas meter. It can be understood that the cover removal detection circuit can directly perform closing control on the gas meter valve, and can also send a signal to the valve control device, and the valve control device directly performs closing control on the gas meter valve.

In order to ensure good contact and contact stability between the conducting member and the cap-removing contact, in one embodiment, the cap-removing contact is provided with an elastic member, and the conducting member is connected with the cap-removing contact through the elastic member. Specifically, the upper part of the cover-unloading contact in the groove can be fixedly connected with a metal spring, so that the false disconnection between the conducting piece and the cover-unloading contact caused by the dimensional tolerance or vibration and other reasons between the meter cover and the shell is eliminated, and the false detection of the private gas meter is avoided.

In order to further detect the behavior of the user for privacy in modifying the gas meter in advance, in one embodiment, the conducting member is a fastener for fixing the gas meter cover on the housing, and the groove is an installation groove of the fastener. For example, the watch cover is screwed and fixed on the shell through a plurality of screws, and the groove for arranging the cover-unloading contact is a threaded hole for screwing in the screws. When the user privately removes the meter cover, the screw can be separated from the cover removing contact by screwing out any screw, so that the level change is generated, and the cover removing detection circuit can be set to close the valve of the gas meter when the level change occurs at any input end, so that the potential safety hazard can be discovered and immediately removed in the early stage of any privacy change of the gas meter by the user.

In order to avoid the situation that the staff can trigger the alarm of the gas meter after detaching the meter cover, in another implementation mode, a preset screw out sequence, namely an input end level change sequence, is preset in the cover detaching detection circuit, when the cover detaching detection circuit detects that the input end level is changed, the level change generation sequence of each input end is judged first, if the input ends are level changes sequentially generated in sequence, no alarm is performed, and if the level change sequence of any one of the input ends is different from the preset sequence, the gas meter valve is controlled to be closed and the alarm is performed.

Specifically, for example, a certain gas meter has 8 screws, the numbers are 1-8 respectively, and the preset sequence of the gas meter is 46715823, so that a worker knowing the sequence can screw out the corresponding screws sequentially according to the sequence, each time one screw is screwed out, the cover removal detection circuit can judge what input end in the 8 input ends is subjected to level change at present and the corresponding screw number of the changed input end, and if all the 8 screws are screwed out according to the preset sequence, the cover removal detection circuit can not alarm all the time; if any error occurs during screwing out, if the screw with the number of 7 is screwed out during screwing out the 3 rd screw, but other screws are screwed out, the cover-removing detection circuit immediately gives an alarm. Because the user does not know the preset sequence, the user can not easily turn out the screws in sequence by guessing, so that unnecessary alarm is avoided, and the alarm for changing the gas meter by the user can be kept. The embodiment through the preset screw out sequence is mainly suitable for the gas meter with a large number of screws.

It can be understood that the two ways can be alternatively used by detecting the level change sequence of the input end to determine whether the private gas meter occurs or not and detecting whether the level change of the input end exists to determine whether the private gas meter occurs or not.

In order to avoid that the user learns the above-mentioned predetermined order experimentally or otherwise, the effectiveness of continuously maintaining the predetermined order does not decrease over time, in one embodiment, the decap detection circuit periodically randomly generates or selects a new predetermined order from the order table as the current predetermined order, or the backend management terminal periodically randomly generates or selects a new predetermined order from the order table and sends the new predetermined order to the decap detection circuit as the current effective predetermined order. The predetermined order is similar to a password, the table cover can be detached under the condition that the alarm is not triggered by mastering the password, the order table is similar to a password book, and the next order can be selected according to the record rotation of the order table. The new sequence will inform the staff. The order is updated regularly, so that the possibility that the user knows the password is greatly reduced, and the difficulty of successfully and privately changing the gas meter by the user is further increased.

In order to further enhance the control of the gas meter, enhance the confirmation means and detection means of the privacy change of the gas meter and improve the abnormal handling timeliness of the gas company, in one embodiment, the valve control device is further electrically connected with the background management end, and sends gas theft alarm information to the background management end when the valve of the gas meter is controlled to be closed. Referring to fig. 1 and 2 specifically, when a user changes a gas meter and is detected by an induction device or is detected by an attitude measurement device, a valve control device immediately turns off a gas valve to eliminate potential safety hazards, and reports the event to a background management end of a gas company, after checking alarm information received and recorded by the background management end, relevant staff can check and visit the user home sending the alarm information according to the alarm information, check the gas meter on site, realize the function of preventing damage and preventing gas theft, recover normal installation of the gas meter, and open the valve to enable the gas pipeline to normally operate.

In order to monitor the result of the measure and feed back the effect after the measure for preventing gas theft is implemented, in order to ensure the smooth execution of the measure, in one embodiment, the valve control device collects the opening information of the gas meter valve after controlling the gas meter valve to be closed. The valve control device determines that the user is stealing gas, so that the gas meter valve is controlled to be closed, for example, a closing instruction is sent to the gas meter valve, but whether the gas meter valve is closed according to the instruction needs to be detected, wherein the gas meter valve can be a valve product with an opening information feedback function of a valve actuator, or an opening sensor can be independently arranged at the valve to feed opening information back to the valve control device, and the actuator or the opening sensor are electrically connected with the valve control device. The actuator or the opening sensor can automatically send the opening information to the valve control device in real time, or send an opening information acquisition instruction to the actuator or the opening sensor only when the valve control device needs to acquire the opening information, and the actuator or the opening sensor feeds back the opening information to the valve control device.

And when the opening information indicates that the valve is not closed, sending the opening information and the failure alarm information of the gas interruption to a background management end. For safety consideration and avoiding improper use of the user, when the gas theft occurs, the gas meter valve must be completely closed, so that whether the gas meter valve cannot be closed due to interference of the user on the action of the gas meter valve or the gas meter valve fails to be closed due to failure of the gas meter valve, the gas meter valve can be detected and reflected in opening information to be sent to a background management end, meanwhile, the valve control device can judge the opening information by itself, and if the valve is not closed, gas failure alarm information is sent to the background management end at the same time, so that staff is informed that potential safety hazards still exist at the position of the user due to the fact that the valve is not closed, and the staff can take countermeasures immediately.

Embodiments of the disclosed anti-theft method for a gas meter are described in detail below with reference to fig. 1-7. The embodiment is a method for implementing the gas meter with the gas theft prevention function.

As shown in fig. 7, the method disclosed in this embodiment includes the following steps:

Step 100, the sensing device installed in the gas meter changes its on-off state by responding to the trigger medium sent by the trigger device installed on the inner side of the gas meter cover.

Referring to fig. 1 and 2, a valve control device connected to the sensing device obtains the on-off state of the sensing device, and controls the gas meter valve to be closed when the on-off state changes. The installation position of the sensing device is located in the triggering range of the triggering medium.

In one embodiment, the triggering device is a magnet and the sensing device is a magneto-sensitive sensor.

In one embodiment, the triggering device is a pressure piece and the sensing device is a force sensor.

In one embodiment, the triggering device is a metal insert and the sensing device is a switching electronic component having a slot adapted to the metal insert.

In one embodiment, referring specifically to fig. 1 and 2, the method further includes: and detecting the magnetic intensity of at least one non-magnetized permanent magnet arranged on the shell of the gas meter through a magnetometer, and judging that a user steals gas when detecting that the permanent magnet is magnetized.

In one embodiment, the housing and cover of the gas meter are provided with electromagnetic shielding layers. It should be noted that, the electromagnetic shielding layer and the non-magnetized permanent magnet are alternatively used, and cannot be set at the same time, so that the two countermeasures for the user to interfere with the reading behavior of the counter can only be alternatively used.

In one embodiment, the gas meter has a plurality of meter covers, a trigger device is mounted on each meter cover, and a corresponding number of sensing devices are mounted in the gas meter, the gas meter including a valve control device, one valve control device being connected to each sensing device.

Referring to fig. 3, when each sensing device changes itself to an off state in response to a trigger medium, the acquiring the on-off state of the sensing device specifically includes: the off state is obtained by a valve control device in series with each sensing device.

Referring to fig. 4 specifically, when each sensing device changes itself to a conductive state in response to a trigger medium, the acquiring the on-off state of the sensing device specifically includes: the on state is obtained by a valve control device connected in parallel with each sensing device.

In one embodiment, referring to fig. 1 and 2, the method further comprises: measuring the attitude change of the gas meter by an attitude measuring device arranged in the gas meter; the valve control device obtains the measurement result of the attitude measurement device and controls the gas meter valve to be closed when the measurement result exceeds the set parameter interval.

In one embodiment, the attitude measurement device employs an acceleration sensor, an inclination sensor, or an inertial sensor.

In one embodiment, the method further comprises: and the cover-removing detection circuit controls the gas meter valve to be closed when detecting that the level of the input end of the cover-removing detection circuit changes. Referring to fig. 5 and 6 specifically, the gas meter includes a cover removing contact disposed in a groove of a cover closing area of a meter cover of the gas meter housing, the cover removing contact is grounded, the gas meter further includes a conducting member disposed on the gas meter cover, one end of the conducting member is electrically connected with the cover removing contact when the gas meter cover is in cover with the gas meter housing, the other end of the conducting member is connected with a power supply, and the cover removing detection circuit is connected with the other end of the conducting member through an input end.

In another embodiment, the method further comprises: when detecting the level change of the input end of the cover-removing detection circuit, the cover-removing detection circuit judges the level change occurrence sequence of each input end and controls the gas meter valve to be closed when the level change occurrence sequence of each input end is different from a preset sequence.

The gas meter comprises a plurality of cover-unloading contacts arranged in a groove of a meter cover closing area of a gas meter shell, the cover-unloading contacts are grounded, the gas meter further comprises a plurality of fasteners arranged on the gas meter cover and used for fixing the meter cover on the shell, one end of each fastener is electrically connected with the corresponding cover-unloading contact when the gas meter cover is in cover with the gas meter shell, the other end of each fastener is connected with a power supply, the groove is a mounting groove of the fastener, and a cover-unloading detection circuit is respectively connected with the other end of each fastener through a plurality of input ends.

In one embodiment, the method further comprises: the cap removal detection circuit periodically and randomly generates or selects a new preset sequence from the sequence table as the current preset sequence; or the background management end periodically and randomly generates or selects a new preset sequence from the sequence table and sends the new preset sequence to the cover removal detection circuit to be used as the current effective preset sequence.

In one embodiment, referring specifically to fig. 1 and 2, the method further includes: the valve control device sends gas theft alarm information to the background management end when controlling the gas meter valve to be closed.

In one embodiment, the method further comprises: the valve control device collects opening information of the gas meter valve after controlling the gas meter valve to be closed, and sends the opening information and the failure alarm information to the background management end when the opening information indicates that the valve is not closed.

Embodiments of the disclosed gas management system with anti-theft function are described in detail below with reference to fig. 1-6. As shown in fig. 1 and fig. 2, the gas management system disclosed in this embodiment mainly includes a background management end and at least one gas meter. The gas meter in this embodiment has the same structure, components and functions as those of the gas meter disclosed in the foregoing gas meter embodiment.

The gas meter mainly comprises: triggering device, induction system and valve controlling means. The triggering device is arranged on the inner side of the gas meter cover and is used for sending out a triggering medium; the sensing device is arranged in the gas meter, the installation position of the sensing device is positioned in the triggering range of the triggering medium, and the sensing device changes the on-off state of the sensing device by responding to the triggering medium or not; the valve control device is connected with the sensing device and is used for acquiring the on-off state of the sensing device and controlling the gas meter valve to be closed when the on-off state changes.

In one embodiment, referring specifically to fig. 1 and 2, a gas meter housing is provided with at least one permanent magnet that is not magnetized.

In one embodiment, the gas meter has a plurality of meter covers, at least one of which is provided with a triggering device and a corresponding number of sensing devices are provided in the gas meter.

In one embodiment, a plurality of triggering devices and a plurality of sensing devices are installed in the gas meter, and the gas meter comprises at least one valve control device which is respectively connected with the sensing devices.

In one embodiment, the gas meter includes a valve control device; referring specifically to fig. 3, each sensing device is turned off in response to a trigger medium, and the valve control device is connected in series with each sensing device. Or referring specifically to fig. 4, the sensing devices are turned on in response to a trigger medium, and the one valve control device is connected in parallel with each sensing device.

In one embodiment, referring specifically to fig. 1 and 2, the gas meter further includes: the attitude measurement device is arranged in the gas meter and is used for measuring the attitude change of the gas meter; and the valve control device is also used for obtaining the measurement result of the attitude measurement device and controlling the gas meter valve to be closed when the measurement result exceeds the set parameter interval.

In one embodiment, referring specifically to fig. 5 and 6, the gas meter further includes: the device comprises a cap removing contact, a conducting piece and a cap removing detection circuit. The cover-unloading contact is arranged in a groove of a cover closing area of the meter cover of the gas meter shell and is grounded. The conducting piece is arranged on the gas meter cover, one end of the conducting piece is electrically connected with the cover-unloading contact when the gas meter cover and the gas meter housing cover are in contact, and the other end of the conducting piece is connected with a power supply. The cover-unloading detection circuit is connected with the other end of the conducting piece through the input end and is used for controlling the gas meter valve to be closed when the level of the input end is detected to change.

In one embodiment, the cover removing contact is provided with an elastic member, and the conducting member is connected with the cover removing contact through the elastic member.

In one embodiment, the conducting member is a fastener for fixing the watch cover to the housing, and the groove is a mounting groove of the fastener.

In another embodiment, referring specifically to fig. 5 and 6, the gas meter further includes: a plurality of cap removal contacts, a plurality of fasteners, and a cap removal detection circuit.

The cover-unloading contact is arranged in a groove of a cover closing area of the meter cover of the gas meter shell and is grounded. The fastener is arranged on the gas meter cover and used for fixing the meter cover on the shell, one end of each fastener is electrically connected with the corresponding cover-unloading contact when the gas meter cover and the gas meter shell cover are covered, the other end of each fastener is connected with a power supply, and the groove is a mounting groove of the fastener. The cover-unloading detection circuit is respectively connected with the other ends of the fasteners through a plurality of input ends, and is used for judging the level change occurrence sequence of the input ends when the level of the input ends changes and controlling the gas meter valve to be closed when the level change occurrence sequence of the input ends is different from a preset sequence.

In one embodiment, the cap removal detection circuit periodically randomly generates or selects a new predetermined order from the order table as the current predetermined order, or the background management terminal periodically randomly generates or selects a new predetermined order from the order table and sends the new predetermined order to the cap removal detection circuit as the current effective predetermined order.

In one embodiment, referring to fig. 1 and 2 specifically, the valve control device is further electrically connected to the background management end, and sends a gas theft alarm message to the background management end when the valve of the gas meter is controlled to be closed.

In one embodiment, the valve control device collects opening information of the gas meter valve after controlling the gas meter valve to be closed, and sends the opening information and the failure warning information to the background management end when the opening information indicates that the valve is not closed.

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present application should be included in the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A gas meter with anti-theft function, comprising:

The valve control device is connected with the sensing device and is used for acquiring the on-off state of the sensing device and controlling the gas meter valve to be closed when the on-off state changes;

The gas meter shell is provided with at least one non-magnetized permanent magnet, the permanent magnet is detected by a magnetometer instrument, if the magnetization is found, the fact that the user approaches the gas meter with the magnet once is indicated, and the gas meter shell is used as detection, recording and evidence of gas stealing behavior; the outer shell and the meter cover of the gas meter are provided with electromagnetic shielding layers; the electromagnetic shielding layer adopts a shielding film and a metal shielding net which are internally arranged in the shell and the surface cover, or adopts electromagnetic shielding paint which is laid on the surfaces of the shell and the surface cover;

further comprises: the attitude measurement device is arranged in the gas meter and is used for measuring the attitude change of the gas meter; the valve control device is also used for acquiring the measurement result of the attitude measurement device and controlling the gas meter valve to be closed when the measurement result exceeds a set parameter interval;

Further comprises: a plurality of cover-unloading contacts arranged in the grooves of the cover closing area of the meter cover of the gas meter shell, wherein the cover-unloading contacts are grounded; the gas meter cover is provided with a plurality of fasteners used for fixing the meter cover on the shell, one end of each fastener is electrically connected with the corresponding cover-unloading contact when the gas meter cover and the gas meter shell cover are covered, the other end of each fastener is connected with a power supply, and the grooves are mounting grooves of the fasteners; the cover-unloading detection circuit is respectively connected with the other ends of the fasteners through a plurality of input ends, and is used for judging the level change occurrence sequence of the input ends when the level of the input ends changes and controlling the gas meter valve to be closed when the level change occurrence sequence of the input ends is different from a preset sequence; the cover removing detection circuit periodically and randomly generates or selects a new preset order from the order table to serve as a current preset order, or the background management end periodically and randomly generates or selects a new preset order from the order table and sends the new preset order to the cover removing detection circuit to serve as a current effective preset order.

2. The gas meter of claim 1, wherein the triggering device is a magnet and the sensing device is a magneto-sensitive sensor.

3. The gas meter of claim 1, wherein the triggering device is a compression member and the sensing device is a force sensitive sensor.

4. The gas meter of claim 1, wherein the triggering device is a metal insert and the sensing device is a switching electronics having a slot adapted to the metal insert.

5. A gas meter as claimed in any one of claims 1 to 4, wherein the gas meter has a plurality of meter covers, at least one of which is provided with said trigger means and a corresponding number of said sensing means are provided in the gas meter.

6. The gas meter of claim 5, wherein a plurality of said trigger devices and a plurality of said sensing devices are mounted in the gas meter, the gas meter including at least one of said valve control devices, said at least one valve control device being respectively connected to each of said sensing devices.

7. The gas meter of claim 6, wherein the gas meter comprises one of said valve controls; wherein each of said sensing means turns itself off in response to said trigger medium, and wherein one valve control means is connected in series with each of said sensing means, or said sensing means turns itself on in response to said trigger medium, and wherein one valve control means is connected in parallel with each of said sensing means.

8. The gas meter of claim 1, wherein the attitude measurement means employs an acceleration sensor, an inclination sensor, or an inertial sensor.

9. The gas meter of any of claims 1-4, further comprising:

the cover-unloading contact is arranged in the groove of the cover closing area of the meter cover of the gas meter shell and is grounded;

the gas meter cover is arranged on the gas meter cover, one end of the gas meter cover is electrically connected with the cover-unloading contact when the gas meter cover is in contact with the gas meter housing cover, and the other end of the gas meter cover is connected with a power supply;

And the cover-unloading detection circuit is connected with the other end of the conducting piece through an input end and is used for controlling the gas meter valve to be closed when the level of the input end is detected to change.

10. The gas meter of claim 9, wherein the cover-removing contact is provided with an elastic member, and the conductive member is connected with the cover-removing contact through the elastic member.

11. The gas meter of claim 9, wherein the conductive member is a fastener securing the meter to the housing and the recess is a mounting slot for the fastener.

12. The gas meter of any of claims 1-4, wherein the valve control device is further electrically connected to a background management terminal and sends a gas theft alarm message to the background management terminal when the valve of the controlled gas meter is closed.

13. The gas meter of claim 12, wherein the valve control means collects opening information of the gas meter valve after the control gas meter valve is closed, and sends the opening information and the failure to break alarm information to the background management terminal when the opening information indicates that the valve is not closed.

14. A method for preventing gas theft for a gas meter, comprising:

The installation position of the sensing device is positioned in the triggering range of the triggering medium;

The method comprises the steps that at least one non-magnetized permanent magnet arranged on a gas meter shell is subjected to magnetic intensity detection through a magnetometer, a user is judged to steal gas when the magnetization of the permanent magnet is detected, and electromagnetic shielding layers are arranged on the gas meter shell and a meter cover;

measuring the attitude change of the gas meter by an attitude measuring device arranged in the gas meter; the valve control device acquires a measurement result of the attitude measurement device and controls the gas meter valve to be closed when the measurement result exceeds a set parameter interval;

When detecting that the level of the input end of the cover removing detection circuit changes, the cover removing detection circuit judges the level change occurrence sequence of each input end and controls the gas meter valve to be closed when the level change occurrence sequence of each input end is different from a preset sequence; the gas meter comprises a plurality of cover-unloading contacts arranged in a groove of a meter cover closing area of a gas meter shell, the cover-unloading contacts are grounded, the gas meter further comprises a plurality of fasteners arranged on the gas meter cover and used for fixing the meter cover on the shell, one end of each fastener is electrically connected with the corresponding cover-unloading contact when the gas meter cover and the gas meter shell cover are closed, the other end of each fastener is connected with a power supply, the groove is a mounting groove of each fastener, and a cover-unloading detection circuit is respectively connected with the other end of each fastener through a plurality of input ends.

15. The method of claim 14, wherein the triggering device is a magnet and the sensing device is a magneto-sensitive sensor.

16. The method of claim 14, wherein the triggering device is a compression element and the sensing device is a force sensor.

17. The method of claim 14, wherein the triggering device is a metal insert and the sensing device is a switching electronics having a slot adapted to the metal insert.

18. The method of claim 14-17, wherein the gas meter has a plurality of covers, each cover having said trigger means mounted thereon and a corresponding number of said sensing means mounted therein, the gas meter including one said valve control means, said one valve control means being connected to each said sensing means;

under the condition that each sensing device changes into a disconnected state when responding to the triggering medium, the step of acquiring the on-off state of the sensing device specifically comprises the following steps: acquiring an off state by the one valve control device connected in series with each sensing device;

Under the condition that each sensing device changes to be in a conducting state when responding to the triggering medium, the step of acquiring the on-off state of the sensing device specifically comprises the following steps: the on state is obtained by the one valve control device connected in parallel with each of the sensing devices.

19. The method of claim 14, wherein the attitude measurement device employs an acceleration sensor, an inclination sensor, or an inertial sensor.

20. The method of preventing gas theft as set forth in any one of claims 14-17, further comprising:

The cover-removing detection circuit controls the gas meter valve to be closed when detecting that the level of the input end of the cover-removing detection circuit changes; wherein,

The gas meter comprises a cover-unloading contact arranged in a groove of a meter cover closing area of the gas meter shell, the cover-unloading contact is grounded, the gas meter further comprises a conducting piece arranged on the gas meter cover, one end of the conducting piece is electrically connected with the cover-unloading contact when the gas meter cover is in cover with the gas meter shell, the other end of the conducting piece is connected with a power supply, and the cover-unloading detection circuit is connected with the other end of the conducting piece through an input end.

21. The method of preventing gas theft of claim 14, further comprising:

the cover removal detection circuit periodically and randomly generates or selects a new preset sequence from the sequence table as a current preset sequence; or alternatively

The background management end periodically and randomly generates or selects a new preset sequence from the sequence table and sends the new preset sequence to the cover removal detection circuit to serve as the current effective preset sequence.

22. The method of preventing gas theft as set forth in any one of claims 14-17, further comprising:

and the valve control device sends gas theft alarm information to the background management end when the valve of the control gas meter is closed.

23. The method of preventing gas theft of claim 22, further comprising:

And the valve control device collects opening information of the gas meter valve after the gas meter valve is controlled to be closed, and sends the opening information and the failure alarm information of gas interruption to the background management end when the opening information indicates that the valve is not closed.

24. The gas management system with the gas theft prevention function is characterized by comprising a background management end and at least one gas meter; wherein, the gas table includes:

The gas meter shell is provided with at least one non-magnetized permanent magnet, the permanent magnet is detected by a magnetometer instrument, if the permanent magnet is magnetized, the fact that the user approaches the gas meter with the magnet once is indicated, and the magnet is used as detection, recording and evidence of gas theft behavior; the outer shell and the meter cover of the gas meter are provided with electromagnetic shielding layers; the electromagnetic shielding layer adopts a shielding film and a metal shielding net which are internally arranged in the shell and the surface cover, or adopts electromagnetic shielding paint which is laid on the surfaces of the shell and the surface cover;

25. The gas management system of claim 24 wherein said triggering device is a magnet and said sensing device is a magnetically sensitive sensor.

26. The gas management system of claim 24 wherein said triggering device is a hold down and said sensing device is a force sensitive sensor.

27. The gas management system of claim 24 wherein said triggering device is a metal insert and said sensing device is a switching electronics component having a slot adapted to said metal insert.

28. The gas management system of any one of claims 24-27 wherein the gas meter has a plurality of meter covers, said trigger means being mounted on at least one of the meter covers and a corresponding number of said sensing means being mounted within the gas meter.

29. The gas management system of claim 28 wherein a plurality of said trigger devices and a plurality of said sensing devices are mounted in a gas meter, the gas meter including at least one of said valve control devices, said at least one valve control device being respectively coupled to each of said sensing devices.

30. The gas management system of claim 29 wherein the gas meter comprises one of said valve controls; wherein each of said sensing means turns itself off in response to said trigger medium, and wherein one valve control means is connected in series with each of said sensing means, or said sensing means turns itself on in response to said trigger medium, and wherein one valve control means is connected in parallel with each of said sensing means.

31. The gas management system of claim 24 wherein said attitude measurement means employs an acceleration sensor, an inclination sensor or an inertial sensor.

32. The gas management system according to any one of claims 24-27, further comprising:

33. The gas management system of claim 32 wherein said cover release contacts are provided with resilient members, said conductive members being connected to said cover release contacts by said resilient members.

34. The gas management system of claim 32 wherein said pass-through is a fastener securing a meter cover to a housing and said recess is a mounting slot for said fastener.

35. The gas management system of claim 24 wherein said de-capping detection circuit periodically randomly generates or selects a new predetermined order from a sequence table as a current predetermined order or said background management terminal periodically randomly generates or selects a new predetermined order from a sequence table and sends it to said de-capping detection circuit as a current effective predetermined order.

36. The gas management system according to any one of claims 24 to 27, wherein said valve control means is further electrically connected to said background management side and transmits a gas theft alarm message to said background management side when said control gas meter valve is closed.

37. The gas management system according to claim 36, wherein said valve control means collects opening information of the gas meter valve after said control gas meter valve is closed, and transmits the opening information and the failure to break gas alarm information to said background management terminal when the opening information indicates that the valve is not closed.