CN108039037A - Wireless telemetering gas-meter detection device - Google Patents
Wireless telemetering gas-meter detection device Download PDFInfo
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- CN108039037A CN108039037A CN201711455665.1A CN201711455665A CN108039037A CN 108039037 A CN108039037 A CN 108039037A CN 201711455665 A CN201711455665 A CN 201711455665A CN 108039037 A CN108039037 A CN 108039037A
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- 238000001514 detection method Methods 0.000 title claims abstract description 43
- 239000007789 gas Substances 0.000 claims description 15
- 230000005611 electricity Effects 0.000 claims description 9
- 230000036772 blood pressure Effects 0.000 claims description 8
- 230000000087 stabilizing effect Effects 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 4
- 238000007689 inspection Methods 0.000 claims description 2
- 239000003345 natural gas Substances 0.000 claims description 2
- 210000004556 brain Anatomy 0.000 claims 1
- 238000002955 isolation Methods 0.000 claims 1
- 230000002452 interceptive effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 4
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 4
- 238000005286 illumination Methods 0.000 description 2
- 229910021417 amorphous silicon Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C19/00—Electric signal transmission systems
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The present invention discloses wireless telemetering gas-meter detection device, it includes：Telecommunication circuit, the input terminal of telecommunication circuit are connected with the serial ports of remote transmitting gas meter, and a telecommunication circuit is corresponding with a remote transmitting gas meter；Switching circuit, the input terminal of switching circuit are connected with the output terminal of one or more telecommunication circuits, and the output terminal of switching circuit is connected with the serial port setting end of terminal device and serial data end respectively；Terminal device gates a wherein branch for switching circuit by serial port setting end, after the meter reading instruction that terminal is sent passes sequentially through serial data end, the gating branch of switching circuit and the telecommunication circuit that is connected with the gating branch, the remote transmitting gas meter for reaching gating carries out meter reading operation, and the data after meter reading feed back to the serial data end of terminal device by former road again.Multiple remote transmitting gas meters can be carried out meter reading operation, easy to operate, detection is accurate, substantially increases detection efficiency by invention wireless telemetering gas-meter detection device with non-interfering.
Description
Technical field
The present invention relates to a kind of wireless telemetering gas-meter detection device.
Background technology
Need detection metering whether normal when wireless telemetering gas-meter dispatches from the factory, be that meter number is read by radio meter register in the past
According to, if read data when someone other meters are operated, can at this time form interference, meter reading easily fails.
The content of the invention
In order to solve the above-mentioned technical problem, the present invention proposes wireless telemetering gas-meter detection device.
In order to achieve the above object, technical scheme is as follows：
Wireless telemetering gas-meter detection device includes：Telecommunication circuit, the input terminal of telecommunication circuit and the string of remote transmitting gas meter
Mouth is connected, and a telecommunication circuit is corresponding with a remote transmitting gas meter；Switching circuit, the input terminal of switching circuit and one or
The output terminal of multiple telecommunication circuits is connected, the output terminal of switching circuit the serial port setting end with terminal device and serial ports number respectively
It is connected according to end；Wherein a branch, the meter reading that terminal is sent that terminal device gates switching circuit by serial port setting end refer to
After order passes sequentially through serial data end, the gating branch of switching circuit and the telecommunication circuit that is connected with the gating branch, arrival
The remote transmitting gas meter of gating carries out meter reading operation, and the data after meter reading feed back to the serial data of terminal device by former road again
End.
Invention proposes wireless telemetering gas-meter detection device, multiple remote transmitting gas meters can be copied with non-interfering
Table handling, easy to operate, detection is accurate, substantially increases detection efficiency.
Based on the above technical solutions, following improvement can also be done：
As preferable scheme, telecommunication circuit is to include the RS485 circuits of RS485 chips.
Using the above preferred scheme, simple in structure, cost is low.
As preferable scheme, switching circuit is to include 16 tunnel switching circuits of two 74HC4067 chips.
Using the above preferred scheme, simple in structure, cost is low.
As preferable scheme, terminal device is computer, one or more equipment in notebook, PAD.
Using the above preferred scheme, it is applied widely.
As preferable scheme, RS485 circuits further include：
Control chip, control chip are connected with RS485 chips, and control chip is by signal control terminal to RS485 chips
Enable Pin sends enabled control signal so that RS485 chips are in data receiving state or data sending state；
Protection location, protection location are connected between the signal control terminal of control chip and the Enable Pin of RS485 chips, are protected
Shield unit is used to control RS485 chips to be in data receiving state when control chip breaks down.
Using the above preferred scheme, by between the signal control terminal of control chip and the Enable Pin of RS485 chips
Protection location is set, to control RS485 chips to be in data receiving state when control chip breaks down, so as to effectively prevent
RS485 chips are constantly in data sending state caused by control chip failure, and then it is different to cause RS485 circuits communication occur
Normal situation.
As preferable scheme, protection location includes：
First capacitance, one end of the first capacitance are connected with the signal control terminal of control chip, the other end of the first capacitance with
The Enable Pin of RS485 chips is connected；
First resistor, one end of first resistor are connected with the other end of the first capacitance, another termination reference of first resistor
Ground.
Using the above preferred scheme, it is simple in structure.
As preferable scheme, protection location further includes：
Second resistance, one end of second resistance are connected with one end of the first capacitance, the other end of second resistance and default electricity
Source is connected.
Using the above preferred scheme, it is simple in structure.
As preferable scheme, enabled control signal includes low level signal and high level signal, wherein,
Control chip by signal control terminal to the Enable Pin of RS485 chips send low level signal when, at RS485 chips
In data receiving state；
Control chip by signal control terminal to the Enable Pin of RS485 chips send high level signal when, at RS485 chips
In data sending state.
Using the above preferred scheme, it is simple in structure.
As preferable scheme, wireless telemetering gas-meter detection device further includes power circuit, the interface of power circuit according to
It is secondary to be powered by lowering and stabilizing blood pressure module and isolated power supply module to telecommunication circuit.
Using the above preferred scheme, can effectively be isolated.
As preferable scheme, when wireless telemetering gas-meter detection device includes multiple telecommunication circuits, wireless remote transmission combustion
Natural gas meter inspection equipment includes the isolated power supply module with telecommunication circuit number, and an isolated power supply module is logical with one
Believe circuit it is corresponding, and isolated power supply module with and its relative to telecommunication circuit be connected；
The interface of power circuit is by lowering and stabilizing blood pressure module and isolated power supply module to being connected with isolated power supply module
Telecommunication circuit is powered.
Using the above preferred scheme, can be effectively to isolating between multiple telecommunication circuits.
Brief description of the drawings
Fig. 1 is the structure diagram of wireless telemetering gas-meter detection device provided in an embodiment of the present invention.
Fig. 2 is the host CPU circuit diagram of remote transmitting gas meter provided in an embodiment of the present invention.
Fig. 3 is the circuit diagram of telecommunication circuit provided in an embodiment of the present invention.
Fig. 4 is the circuit diagram of switching circuit provided in an embodiment of the present invention.
Fig. 5 is one of frame diagram of RS485 circuits provided in an embodiment of the present invention.
Fig. 6 is the two of the frame diagram of RS485 circuits provided in an embodiment of the present invention.
Fig. 7 is the three of the frame diagram of RS485 circuits provided in an embodiment of the present invention.
Fig. 8 is that the structure of power circuit provided in an embodiment of the present invention, lowering and stabilizing blood pressure module and isolated power supply module is shown
It is intended to.
Wherein：Telecommunication circuit 1, switching circuit 2, remote transmitting gas meter 3, terminal device 4, power circuit 5, lowering and stabilizing blood pressure module
6th, isolated power supply module 7.
Embodiment
The preferred embodiment that the invention will now be described in detail with reference to the accompanying drawings.
In order to reach the purpose of the present invention, in some of embodiments of wireless telemetering gas-meter detection device, such as Fig. 1 institutes
Show, wireless telemetering gas-meter detection device includes：
Telecommunication circuit 1, the input terminal of telecommunication circuit 1 are connected with the serial ports of remote transmitting gas meter 3, telecommunication circuit 1 with
One remote transmitting gas meter 3 is corresponding；
Switching circuit 2, the input terminal of switching circuit 2 are connected with the output terminal of one or more telecommunication circuits 1, switching electricity
The output terminal on road 2 is connected with the serial port setting end of terminal device 4 and serial data end respectively；
Terminal device 4 gates a wherein branch for switching circuit 2, the meter reading instruction that terminal is sent by serial port setting end
After passing sequentially through serial data end, the gating branch of switching circuit 2 and the telecommunication circuit 1 that is connected with the gating branch, reach
The remote transmitting gas meter 3 of gating carries out meter reading operation, and the data after meter reading feed back to the serial data of terminal device 4 by former road again
End.
Invention proposes wireless telemetering gas-meter detection device, multiple remote transmitting gas meters 3 can be carried out with non-interfering
Meter reading operates, easy to operate, and detection is accurate, substantially increases detection efficiency.
In order to further optimize the implementation result of the present invention, in other embodiment, remaining feature technology phase
Together, difference is, telecommunication circuit 1 is to include the RS485 circuits of RS485 chips, and switching circuit 2 is to include two
16 tunnel switching circuits 2 of 74HC4067 chips, terminal device 4 is computer, one or more equipment in notebook, PAD.
Using the above preferred scheme, it is applied widely.Fig. 2 is the host CPU circuit of remote transmitting gas meter 3, is used
ST32L031, is connected by serial ports UART1_RX with UART1_TX with the RS485 circuits in Fig. 3, the then output of RS485 circuits
End A, B is changed into one turn of 16 road RS485 output by two 74HC4067 (as shown in Figure 4).
In order to further optimize the implementation result of the present invention, in other embodiment, remaining feature technology phase
Together, difference is, as shown in figure 5, RS485 circuits further include：
Control chip, control chip are connected with RS485 chips, and control chip is by signal control terminal to RS485 chips
Enable Pin sends enabled control signal so that RS485 chips are in data receiving state or data sending state；
Protection location, protection location are connected between the signal control terminal of control chip and the Enable Pin of RS485 chips, are protected
Shield unit is used to control RS485 chips to be in data receiving state when control chip breaks down；
Enabled control signal includes low level signal and high level signal, wherein,
Control chip by signal control terminal to the Enable Pin of RS485 chips send low level signal when, at RS485 chips
In data receiving state；
Control chip by signal control terminal to the Enable Pin of RS485 chips send high level signal when, at RS485 chips
In data sending state.
Using the above preferred scheme, by between the signal control terminal of control chip and the Enable Pin of RS485 chips
Protection location is set, to control RS485 chips to be in data receiving state when control chip breaks down, so as to effectively prevent
RS485 chips are constantly in data sending state caused by control chip failure, and then it is different to cause RS485 circuits communication occur
Normal situation.
Further, as shown in fig. 6, protection location includes：
First capacitance C1, one end of the first capacitance C1 are connected with the signal control terminal of control chip, and the first capacitance C1's is another
One end is connected with the Enable Pin of RS485 chips；
First resistor R1, one end of first resistor R1 are connected with the other end of the first capacitance C1, and first resistor R1's is another
Terminate reference ground.
Using the above preferred scheme, since the drop-down of first resistor R1 acts on, in idle condition, RS485 chips
Enable Pin will be in low level state, and when there is data to need to receive, control chip will export low level signal, at this time, first
The both ends of capacitance C1 are low level, therefore the first capacitance C1 is without discharge and recharge, it is possible to ensure the enabled of RS485 chips
End is in low level state, so as to fulfill the reception of data.
When there is data to need to send, control chip will export high level signal, since the first capacitance C1 understands instantaneous short circuit,
So the right end of the first capacitance C1 can immediately become high level, so as to fulfill the transmission of data.After the completion of data sending, first
Capacitance C1 can be slowly fully charged, and the right end of the first capacitance C1 is changed into low level again., can be with order to ensure that data are correctly transmitted
The resistance value of suitable first capacitance C1 and first resistor R1 are selected according to the sending time of data, with during data sending,
The Enable Pin of RS485 chips will not fall to low level.
When crashing when failure occurs in control chip, if control chip exports low level signal, RS485 chips always
Enable Pin can be constantly in low level state, i.e. be constantly in data receiving state, thus do not interfere with RS485 circuits
Normal communication.
And if control chip exports high level signal always, by analysis above, the first capacitance C1 is filling
After full electricity, the Enable Pin of RS485 chips can be made to be constantly in low level state, therefore, even if control chip appearance crash is latter
Straight output high level signal, also can be because of the buffer action of the first capacitance C1 so that the Enable Pin of RS485 chips is always held at low
Level state, so as to achieve the purpose that to protect RS485 circuits.
Therefore, when crashing occurs in control chip or during failure, no matter the signal control terminal of control chip exports high electricity always
Ordinary mail number or low level signal, the Enable Pin of RS485 chips all will always be in low level state, that is, be constantly in data and connect
Receipts state, so as to ensure the normal communication of RS485 circuits.
It should be noted that the resistance value of first resistor R1 and the capacitance of the first capacitance C1 send data according to RS485 chips
Duration determine.
Specifically, it is assumed that the voltage of the Enable Pin of RS485 chips is just considered high level signal in more than 2V, just allows
The normal transmission of data, and normal high level driving voltage is 5V, therefore, with the charging of the first capacitance C1, RS485 chips
The voltage of Enable Pin will be begun to decline from 5V, as long as data to be sent all can have been sent before dropping to 2V under voltage
Finish.In different applications, time that sending data needs is different, therefore, when can be according to no transmission
Between determine RC time constants in different application, the resistance value of first resistor R1 and the first electricity are then determined according to RC time constants
Hold the capacitance of C1.
Further, as shown in fig. 7, protection location further includes：
Second resistance R2, one end of second resistance R2 are connected with one end of the first capacitance C1, the other end of second resistance R2
It is connected with default power supply VCC.Wherein, the resistance value of second resistance R2 is determined according to the driving force of control chip.
Using the above preferred scheme, second resistance R2 then acts on the driving energy for the GPIO feet for mainly increasing control chip
Power, different according to the driving force of the GPIO feet of different control chips, the resistance value selection of second resistance R2 is different, and such as controls core
The driving force of the GPIO feet of piece 200 is very strong, charges enough to the first capacitance C1, can be not provided with second resistance at this time
R2。
As shown in figure 8, in order to further optimize the implementation result of the present invention, in other embodiment, remaining
Feature technology is identical, and difference is, wireless telemetering gas-meter detection device further includes power circuit 5, and power circuit connects
Mouth passes sequentially through lowering and stabilizing blood pressure module 6 and isolated power supply module 7 is powered to telecommunication circuit 1.
Using the above preferred scheme, can effectively be isolated.
Further, when wireless telemetering gas-meter detection device includes multiple telecommunication circuits 1, wireless telemetering gas-meter detection
Equipment includes the isolated power supply module 7 with 1 number of telecommunication circuit, an isolated power supply module 7 and the electricity that communicates
Road 1 is corresponding, and isolated power supply module with and its relative to telecommunication circuit 1 be connected；
The interface of power circuit is connected by lowering and stabilizing blood pressure module 6 and isolated power supply module 7 to isolated power supply module
Telecommunication circuit 1 power.
Using the above preferred scheme, can be effectively to isolating between multiple telecommunication circuits 1.
Further, power circuit includes：
Solar energy converting unit, it is one piece of amorphous silicon solar energy plate, for converting the light to electric energy；
Power storaging unit, for storing the electric energy converted by solar energy converting unit；
The unidirectionally controlled unit of single current, its input terminal are electrically connected with solar energy converting unit, its output terminal and electric energy storage are single
Member is electrically connected, for the unidirectionally controlled of electric current.
Using the above preferred scheme, more energy efficient environmental protection.The unidirectionally controlled unit of single current can be relatively low by forward conduction voltage
Diode realize, it is ensured that in the case of no illumination, the electricity of power storaging unit will not consume changed in solar energy it is single
In member, and in the case of bright and clear, charge power supply can be provided to power storaging unit in time.
Further, solar energy converting unit is arranged at the surface of detection device housing.
Using the above preferred scheme, it is simple in structure.
Further, the reflective mirror being connected with detection device housing into rotation is provided with the outside of solar energy converting unit.
Using the above preferred scheme, reflective mirror reflects illumination in solar panels surface.
The first magnetite is equipped with a mirror, and the second electromagnet, the second electromagnet and control are equipped with detection device housing
Unit processed is electrically connected, and control unit is also electrically connected with solar energy converting unit.
Under normal circumstances, the first magnetite opposite polarity on the second electromagnet and reflective mirror on valve housing.Reflective mirror
One end be connected with detection device housing into rotation, its other end is attracted each other by opposite polarity two magnetites, reflective mirror
Minute surface protects minute surface towards detection device housing.
When control unit detects that the electric energy of solar energy converting unit is relatively low, control unit is reversely electric to the second electromagnet
Flow, the second electromagnet on detection device housing is identical with the first magnetite polarity on reflective mirror.By the principle that identical charges repel each other,
The minute surface of reflective mirror produces, and sunlight is reflexed in solar energy converting unit.
When control unit detects that the electric energy of solar energy converting unit is higher, control unit is electric in the same direction to the second electromagnet
Flow, the first magnetite opposite polarity on the second electromagnet and reflective mirror on detection device housing, attracts each other.
The above is only the preferred embodiment of the present invention, it is noted that for those of ordinary skill in the art,
Without departing from the concept of the premise of the invention, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect scope.
Claims (10)
1. wireless telemetering gas-meter detection device, it is characterised in that including：
Telecommunication circuit, the input terminal of the telecommunication circuit are connected with the serial ports of remote transmitting gas meter, telecommunication circuit with
One remote transmitting gas meter is corresponding；
Switching circuit, the input terminal of the switching circuit is connected with the output terminal of one or more telecommunication circuits, described
The output terminal of switching circuit is connected with the serial port setting end of terminal device and serial data end respectively；
The terminal device gates a wherein branch for switching circuit by the serial port setting end, and what the terminal was sent copies
Table instruction passes sequentially through the serial data end, the gating branch of the switching circuit and the communication that is connected with the gating branch
After circuit, the remote transmitting gas meter for reaching gating carries out meter reading operation, and the data after meter reading feed back to the terminal by former road again
The serial data end of equipment.
2. wireless telemetering gas-meter detection device according to claim 1, it is characterised in that the telecommunication circuit is to include
The RS485 circuits of RS485 chips.
3. wireless telemetering gas-meter detection device according to claim 1, it is characterised in that the switching circuit is to include
16 tunnel switching circuits of two 74HC4067 chips.
4. wireless telemetering gas-meter detection device according to claim 1, it is characterised in that the terminal device is electricity
One or more equipment in brain, notebook, PAD.
5. according to claim 2-4 any one of them wireless telemetering gas-meter detection devices, it is characterised in that the RS485
Circuit further includes：
Control chip, the control chip are connected with the RS485 chips, and the control chip is by signal control terminal to described
The Enable Pin of RS485 chips sends enabled control signal so that the RS485 chips are in data receiving state or data sending
State；
Protection location, the protection location are connected to the signal control terminal of the control chip and enabling for the RS485 chips
Between end, the protection location is used to control the RS485 chips to be in the data when the control chip breaks down
Reception state.
6. wireless telemetering gas-meter detection device according to claim 5, it is characterised in that the protection location includes：
First capacitance, one end of first capacitance are connected with the signal control terminal of the control chip, first capacitance
The other end is connected with the Enable Pin of the RS485 chips；
First resistor, one end of the first resistor are connected with the other end of first capacitance, the first resistor it is another
Terminate reference ground.
7. wireless telemetering gas-meter detection device according to claim 6, it is characterised in that the protection location also wraps
Include：
Second resistance, one end of the second resistance are connected with one end of first capacitance, the other end of the second resistance
It is connected with default power supply.
8. wireless telemetering gas-meter detection device according to claim 7, it is characterised in that the enabled control signal bag
Low level signal and high level signal are included, wherein,
The control chip sends the low level signal by the signal control terminal to the Enable Pin of the RS485 chips
When, the RS485 chips are in the data receiving state；
The control chip sends the high level signal by the signal control terminal to the Enable Pin of the RS485 chips
When, the RS485 chips are in the data sending state.
9. according to claim 1-4 any one of them wireless telemetering gas-meter detection devices, it is characterised in that the radio remote
Pass gas meter, flow meter detection device and further include power circuit, the interface of the power circuit passes sequentially through lowering and stabilizing blood pressure module and isolation electricity
Source module is powered to telecommunication circuit.
10. wireless telemetering gas-meter detection device according to claim 9, it is characterised in that when the wireless remote transmission fires
When Natural gas meter inspection equipment includes multiple telecommunication circuits, the wireless telemetering gas-meter detection device includes and the telecommunication circuit number
The isolated power supply module of identical quantity is measured, an isolated power supply module and a telecommunication circuit are corresponding and described
Isolated power supply module with and its relative to the telecommunication circuit be connected；
The interface of the power circuit by the lowering and stabilizing blood pressure module and the isolated power supply module to the isolated power supply
The telecommunication circuit power supply that module is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711455665.1A CN108039037A (en) | 2017-12-28 | 2017-12-28 | Wireless telemetering gas-meter detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711455665.1A CN108039037A (en) | 2017-12-28 | 2017-12-28 | Wireless telemetering gas-meter detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108039037A true CN108039037A (en) | 2018-05-15 |
Family
ID=62098118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711455665.1A Pending CN108039037A (en) | 2017-12-28 | 2017-12-28 | Wireless telemetering gas-meter detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108039037A (en) |
Citations (10)
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|---|---|---|---|---|
| JPH08240473A (en) * | 1995-03-06 | 1996-09-17 | Seibu Gas Kk | Gas meter inspection device |
| JP2002369270A (en) * | 2001-06-12 | 2002-12-20 | Yazaki Corp | Automatic reporting apparatus |
| JP2008225841A (en) * | 2007-03-13 | 2008-09-25 | Matsushita Electric Ind Co Ltd | Gas appliance monitoring device |
| CN103344858A (en) * | 2013-06-29 | 2013-10-09 | 国家电网公司 | Method and device for testing meter reading port of intelligent electric meter |
| CN104316147A (en) * | 2014-11-14 | 2015-01-28 | 桂林市利通电子科技有限责任公司 | Multifunctional production testing and inspecting device for gas meters |
| CN204214526U (en) * | 2014-11-14 | 2015-03-18 | 桂林市利通电子科技有限责任公司 | A kind of gas meter, flow meter multifunctional production test verification device |
| CN104897954A (en) * | 2015-05-22 | 2015-09-09 | 成都前锋电子仪器有限责任公司 | Multipath intelligent gas meter quiescent current automatic detection device |
| CN205051567U (en) * | 2015-10-30 | 2016-02-24 | 江西金程智能科技有限公司 | Power is kept apart in test of gas table |
| CN206432984U (en) * | 2016-12-30 | 2017-08-22 | 比亚迪股份有限公司 | RS485 circuits |
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-
2017
- 2017-12-28 CN CN201711455665.1A patent/CN108039037A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08240473A (en) * | 1995-03-06 | 1996-09-17 | Seibu Gas Kk | Gas meter inspection device |
| JP2002369270A (en) * | 2001-06-12 | 2002-12-20 | Yazaki Corp | Automatic reporting apparatus |
| JP2008225841A (en) * | 2007-03-13 | 2008-09-25 | Matsushita Electric Ind Co Ltd | Gas appliance monitoring device |
| CN103344858A (en) * | 2013-06-29 | 2013-10-09 | 国家电网公司 | Method and device for testing meter reading port of intelligent electric meter |
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| CN205051567U (en) * | 2015-10-30 | 2016-02-24 | 江西金程智能科技有限公司 | Power is kept apart in test of gas table |
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