CN206818267U - Intellectual water meter tamper detects circuit - Google Patents
Intellectual water meter tamper detects circuit Download PDFInfo
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- CN206818267U CN206818267U CN201720693349.7U CN201720693349U CN206818267U CN 206818267 U CN206818267 U CN 206818267U CN 201720693349 U CN201720693349 U CN 201720693349U CN 206818267 U CN206818267 U CN 206818267U
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- resistance
- voltage comparator
- tamper
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- water
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
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Abstract
Intellectual water meter tamper detects circuit.It is related to measuring equipment field, more particularly to a kind of intellectual water meter tamper detection circuit.Provide a kind of preventing watermeter from being detached simple in construction, can effectively preventing user from stealing water and detect circuit.Including tamper detection module, voltage comparator circuit and valve event module, the tamper detection module, voltage comparison module and valve event module are sequentially connected；The tamper detection module includes resistance R1, resistance R2, tamper button K and electric capacity C, power supply VCC, resistance R1, tamper button K and resistance R2 are grounded after being sequentially connected, the both ends shunt capacitance C of the resistance R2, the voltage comparison module are connected between resistance R2 and electric capacity C.The electromagnetic wire bag Q1 is used for the break-make for controlling electromagnetic valve Q, and the electromagnetic valve Q is on water pipe.The utility model has simple in construction, easy to maintain and the advantages of can effectively prevent user from stealing water, saving water resource on the whole.
Description
Technical field
It the utility model is related to measuring equipment field, more particularly to a kind of intellectual water meter tamper detection circuit.
Background technology
At present, most intellectual water meter has employed dry cell power supply, and the often meeting in the open and close of control valve
There is problems with：Intellectual water meter inner control circuit does not have energy-storage travelling wave tube, and user when removing battery, without electricity lead by whole system
Intellectual water meter is caused to be not carried out closing valve events；Intellectual water meter inner structure leans on Machine Design, there is trigger mechanism, and power supply still utilizes electricity
Pond powers, and because Machine Design is unreliable, when removing battery, microswitch does not work user, does not still reach and closes valve
Purpose；Increase energy-storage travelling wave tube in intellectual water meter control circuit, user is when removing battery, by energy-storage travelling wave tube institute reserve of electricity to valve
Gate control circuit is powered, and when external cell electricity reduces, energy-storage travelling wave tube electricity also accordingly reduces, it is impossible to reliably performs valve
The whole process of opening and closing.Variety of problems above provides a chance for stealing water to illegal user.
State Intellectual Property Office 2011-1-26 discloses a utility model patent（CN201724702U, have multiple anti-breaking
Electricity steals the intellectual water meter of water）Its internal control circuit is disclosed to contain：Power supply circuit, microcontroller, valve controling circuit,
Sample circuit, RF Signal circuit.Using advanced Technology of Radio Frequency Card, first pay dues and use the management of the use of water theory of water afterwards, avoid
The drawbacks of manual metering.It is characterized in that：Microcontroller is given to provide normal working voltage using dry cell, in addition dry cell
Positive pole is connected with triode P1 emitter stage, and valve opening power supply is provided for valve controling circuit, the positive pole of dry cell also with two poles
Pipe D2 anode is connected, and the negative pole of dry cell is connected with energy-storage travelling wave tube E1 negative pole, and E1 negative pole is connected with D2 negative electrode
Connect the emitter stage afterwards with triode P2 to be connected, provided for valve controling circuit and close valve power supply.Mainly by increasing stand-by power supply
The whole process of opening and closing is realized, but its is complicated, is not easy to install.
Utility model content
The utility model is directed to problem above, there is provided it is a kind of it is simple in construction, can effectively prevent the water meter that user steals water from preventing
Open and inspect slowdown monitoring circuit.
The technical solution of the utility model is：Including tamper detection module, voltage comparator circuit and valve event module, institute
Tamper detection module, voltage comparison module and valve event module is stated to be sequentially connected；
The tamper detection module includes resistance R1, resistance R2, tamper button K and electric capacity C, power supply VCC, resistance R1, prevents
Tear open after button K and resistance R2 is sequentially connected and be grounded, the both ends shunt capacitance C of the resistance R2, the voltage comparison module connection
Between resistance R2 and electric capacity C.
The voltage comparator circuit includes three input nand gate N1 and voltage comparator N2, the three input nand gates N1's
Input one is connected between resistance R2 and electric capacity C, the input nand gate N1 of input two and three of the three input nand gates N1
Input three connect the output end connection voltage comparator N2 of three input nand gate N1 described in a water flow switch respectively；
The positive input of the voltage comparator N2 and voltage comparator N2 power input connect power supply respectively
VCC, the voltage comparator N2 reverse input end connect three input nand gate N1 output end, and the voltage comparator connects
Ground terminal is grounded, the output end connecting valve action module of the voltage comparator N2.
The valve event module includes electromagnetic valve Q and the electromagnetic wire bag Q1 associated with electromagnetic valve Q, the electromagnetic wire
Bag Q1 one end is connected in voltage comparator N2 output end, the other end ground connection of the electromagnetic wire bag Q1, the electromagnetic wire
Bag Q1 is used for the break-make for controlling electromagnetic valve Q, and the electromagnetic valve Q is on water pipe.
The water flow switch includes magnetic core, back-moving spring and sensor, and the magnetic core is at the section of the water pipe, institute
State magnetic core and be provided with back-moving spring, the both ends of the magnetic core connect sensor, the sensor connection and three inputs by wire
NOT gate N1.
The utility model tamper button K when Water meter cover covers is in closure state, now exports high level, gives simultaneously
Electric capacity C is charged, and when Water meter cover is opened, tamper button K is off, and now resistance R2 and electric capacity C forms meeting road, defeated
Go out and switch to low level rapidly.When there is current to flow through, water flow switch exports high level, conversely, output low level.A pair of current are opened
Close and the level signal of tamper detection module output is input to voltage comparator after the processing of three input nand gates.When a pair of water
When any one level signal is low level in stream switch and tamper detection module（Namely when water meter cover is opened, current are opened
When any one situation occurs in closing damage or cutting off the water）Three input nand gate N1 just export low level signal, when water meter cover open,
Water flow switch can not detect current conditions output low level again when（When namely illegally unloading water meter or water meter are out of order）Three is defeated
Enter NAND gate N1 and just export high level signal.Enter when three input nand gate N1 export low level signal through over-voltage comparator N2
Row voltage ratio is compared with now causing valve event module action, electromagnetic valve, Q are opened, normal use water, when three input nand gates
Voltage ratio is carried out compared with electromagnetic valve Q is closed, it is impossible to uses water through over-voltage comparator N2 when N1 exports high level signal.Thus
It can effectively prevent user from stealing water, saving water resource.Judge whether to think to unload water meter by three input nand gates, when water meter cover is beaten
Open and be considered as someone when water flow switch can't detect water-flow signal and illegally unload water meter, water suspicion steathily be present, electromagnetic valve
It may turn off, cut-out water route.It would not be cut off when above-mentioned condition has one to be unsatisfactory for water route, avoid malfunctioning,
Make judgement more accurate, reduce malfunction risk.Circuit structure is simple simultaneously, is easily installed maintenance.The utility model is from entirety
It is upper have it is simple in construction, easy to maintain and the advantages of can effectively prevent user from stealing water, saving water resource.
Brief description of the drawings
Fig. 1 is the utility model electrical schematic diagram,
Fig. 2 is the utility model tamper detection module electrical schematic diagram,
Fig. 3 is the utility model valve action module electrical schematic diagram.
Embodiment
The utility model as Figure 1-3, including tamper detection module, voltage comparator circuit and valve event module, institute
Tamper detection module, voltage comparison module and valve event module is stated to be sequentially connected；The tamper detection module include resistance R1,
Resistance R2, tamper button K and electric capacity C, power supply VCC, resistance R1, tamper button K and resistance R2 are grounded after being sequentially connected, the electricity
R2 both ends shunt capacitance C is hindered, the voltage comparison module is connected between resistance R2 and electric capacity C.When Water meter cover covers
Tamper button K is in closure state, now exports high level, while is charged to electric capacity C, the tamper button when Water meter cover is opened
K is off, and now resistance R2 and electric capacity C forms meeting road, and output switchs to low level rapidly.
The voltage comparator circuit includes three input nand gate N1 and voltage comparator N2, the three input nand gates N1's
Input one is connected between resistance R2 and electric capacity C, the input nand gate N1 of input two and three of the three input nand gates N1
Input three connect the output end connection voltage comparator N2 of three input nand gate N1 described in a water flow switch respectively；It is described
Voltage comparator N2 positive input and voltage comparator N2 power input connect power supply VCC, the voltage ratio respectively
Reverse input end compared with device N2 connects three input nand gate N1 output end, and the earth terminal ground connection of the voltage comparator is described
Voltage comparator N2 output end connecting valve action module.Water meter is fixed on water pipe, is generally had into water section and water outlet and is cut
Face, a pair of water flow switches are separately fixed at at water section and water outlet section.The high electricity of water flow switch output when there is current to flow through
It is flat, conversely, output low level.A pair of water flow switches and the level signal of tamper detection module output are by three input nand gates
Voltage comparator is input to after reason.When any one level signal is low level in a pair of water flow switches and tamper detection module
Wait（Namely when any one situation occurs during water meter cover is opened, water flow switch is damaged or cut off the water）Three input nand gate N1 are just
Low level signal is exported, when water meter cover is opened, water flow switch can not detect current conditions output low level again（It is namely illegal
When unloading water meter or water meter are out of order）Three input nand gate N1 just export high level signal.When three input nand gate N1 outputs are low
Voltage ratio is carried out compared with now causing valve event module action, electromagnetic valve, Q are beaten through over-voltage comparator N2 during level signal
Open, normal use water, voltage ratio is carried out compared with electricity through over-voltage comparator N2 when three input nand gate N1 export high level signal
Magnet valve door Q is closed, it is impossible to uses water.Thus it can effectively prevent user from stealing water, saving water resource.
The valve event module includes electromagnetic valve Q and the electromagnetic wire bag Q1 associated with electromagnetic valve Q, the electromagnetic wire
Bag Q1 one end is connected in voltage comparator N2 output end, the other end ground connection of the electromagnetic wire bag Q1, the electromagnetic wire
Bag Q1 is used for the break-make for controlling electromagnetic valve Q, and the electromagnetic valve Q is on water pipe.
That is judge whether to think to unload water meter by three input nand gates, when water meter cover is opened and water flow switch
Someone is considered as when can't detect water-flow signal and illegally unloads water meter, water suspicion steathily be present, and electromagnetic valve be may turn off, and cut-out is used
Water route.It would not be cut off when above-mentioned condition has one to be unsatisfactory for water route, avoid malfunctioning, make judgement more accurate,
Reduce malfunction risk.Circuit structure is simple simultaneously, is easily installed maintenance.
The water flow switch includes magnetic core, back-moving spring and sensor, and the magnetic core is at the section of the water pipe, institute
State magnetic core and be provided with back-moving spring, the both ends of the magnetic core connect sensor, the sensor connection and three inputs by wire
NOT gate N1.
Claims (4)
1. intellectual water meter tamper detects circuit, including tamper detection module, voltage comparator circuit and valve event module, its feature
It is, the tamper detection module, voltage comparison module and valve event module are sequentially connected；
The tamper detection module includes resistance R1, resistance R2, tamper button K and electric capacity C, and power supply VCC, resistance R1, tamper are pressed
Button K and resistance R2 is grounded after being sequentially connected, and the both ends shunt capacitance C of the resistance R2, the voltage comparison module is connected to electricity
Between resistance R2 and electric capacity C.
2. intellectual water meter tamper according to claim 1 detects circuit, it is characterised in that the voltage comparator circuit includes
Three input nand gate N1 and voltage comparator N2, the input one of the three input nand gates N1 are connected to resistance R2 and electric capacity C
Between, the input nand gate N1 of input two and three of three input nand gates N1 input three connects a current and opened respectively
Close the output end connection voltage comparator N2 of the three input nand gates N1；
The positive input of the voltage comparator N2 and voltage comparator N2 power input connect power supply VCC, institute respectively
The reverse input end for stating voltage comparator N2 connects three input nand gate N1 output end, the ground connection termination of the voltage comparator
Ground, the output end connecting valve action module of the voltage comparator N2.
3. intellectual water meter tamper according to claim 2 detects circuit, it is characterised in that the valve event module includes
The electromagnetic valve Q and electromagnetic wire bag Q1 associated with electromagnetic valve Q, one end of the electromagnetic wire bag Q1 is connected to voltage comparator N2
Output end on, the other end of electromagnetic wire bag Q1 ground connection, the electromagnetic wire bag Q1 is used for the break-make for controlling electromagnetic valve Q,
The electromagnetic valve Q is on water pipe.
4. intellectual water meter tamper according to claim 3 detects circuit, it is characterised in that the water flow switch includes magnetic
Core, back-moving spring and sensor, for the magnetic core at the section of the water pipe, the magnetic core is provided with back-moving spring, described
The both ends of magnetic core connect sensor, the sensor connection and three input NOT gate N1 by wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720693349.7U CN206818267U (en) | 2017-06-14 | 2017-06-14 | Intellectual water meter tamper detects circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720693349.7U CN206818267U (en) | 2017-06-14 | 2017-06-14 | Intellectual water meter tamper detects circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206818267U true CN206818267U (en) | 2017-12-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720693349.7U Active CN206818267U (en) | 2017-06-14 | 2017-06-14 | Intellectual water meter tamper detects circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112305282A (en) * | 2020-10-10 | 2021-02-02 | 浙江晨泰科技股份有限公司 | Ammeter with uncap and detect |
| CN112702046A (en) * | 2020-12-31 | 2021-04-23 | 深圳天盈光电系统有限公司 | Product anti-dismantling hardware circuit |
-
2017
- 2017-06-14 CN CN201720693349.7U patent/CN206818267U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112305282A (en) * | 2020-10-10 | 2021-02-02 | 浙江晨泰科技股份有限公司 | Ammeter with uncap and detect |
| CN112702046A (en) * | 2020-12-31 | 2021-04-23 | 深圳天盈光电系统有限公司 | Product anti-dismantling hardware circuit |
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