CN207395833U - For the tamper detection circuit of valve control device metering platelet - Google Patents
For the tamper detection circuit of valve control device metering platelet Download PDFInfo
- Publication number
- CN207395833U CN207395833U CN201721554160.6U CN201721554160U CN207395833U CN 207395833 U CN207395833 U CN 207395833U CN 201721554160 U CN201721554160 U CN 201721554160U CN 207395833 U CN207395833 U CN 207395833U
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- control device
- valve control
- platelet
- detection circuit
- circuit
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Abstract
The utility model discloses a kind of tamper detection circuit for valve control device metering platelet, including controller, optical detection circuit, switching tube circuit and current-limiting resistance；Optical detection circuit and switching tube circuit arrangement are on valve control device metering platelet, and controller and current-limiting resistance are arranged on the mainboard of valve control device；The Lighting information of optical detection circuit detection natural light simultaneously sends detection signal to switching tube circuit；Switching tube circuit is according to light detecting signal output switching signal；Controller exports detection signal to output terminal by current-limiting resistance, for detecting the broken string state of the connection cables between valve control device metering platelet and valve control device mainboard.The utility model can monitor whether valve control device metering platelet is disassembled or breaks in real time by phototriode and corresponding on-off circuit, and the utility model circuit is simple and reliable, of low cost.
Description
Technical field
The utility model is more particularly to a kind of tamper detection circuit for valve control device metering platelet.
Background technology
With the development and the improvement of people's living standards of national economy technology, existing measuring instrument all starts toward intelligence
Change development.
Existing intellectual water meter generally collects the functions such as valve drive control, metering in a circuit board, and integrally fixes
In water meter.In practical application, generally by valve drive control, outside the function modules such as metering are independently of essentic-water-meter, i.e. institute
The split structure design of meaning.The benefit of split-type design is that essentic-water-meter can individually do mechanical water meter use, in addition independently of
The circuit and structure of this part valve drive control and function of measuring outside essentic-water-meter can serve as smart electronics water meter
It uses.It is called valve control device independently of this partial function structure outside essentic-water-meter.Essentic-water-meter is in itself without electronic measurement work(
It can be, it is necessary to which gage probe platelet (gage probe platelet is also known as valve control device metering platelet) be placed on the circular hole of essentic-water-meter
Middle to realize being measured with aqueous electron for water meter, valve control device metering platelet is connected to by cable on the mainboard of valve control device.
But the special tectonic that water person is directed to above-mentioned split type water meter is stolen, take new surreptitiously sailor's section：By valve control device
The connection cables for measuring platelet and valve control device mainboard are cut off, situation about can not be uploaded so as to fulfill continuous data；Or by valve control
Device metering platelet is detached from the circular hole of essentic-water-meter, so as to allow valve control device metering platelet that can not obtain detection signal, to reach
The surreptitiously purpose of water.
At present, sailor's section is stolen for above-mentioned Split type intelligent water meter, there has been no preferable preventive means.Water supply department
It can only rely on to strengthen the legal system publicity or often carry out the measures such as inspection to water meter and take precautions against stealing water.But the above method
It is apparent time-consuming and laborious, and less effective.
Utility model content
It can quickly detect whether valve control device metering platelet is disassembled the purpose of this utility model is to provide one kind, and
Circuit is simple and reliable, the low-cost tamper detection circuit for valve control device metering platelet.
This tamper detection circuit for valve control device metering platelet provided by the utility model, valve control device metering platelet are put
It puts in the circular hole of essentic-water-meter, it is characterised in that including controller, optical detection circuit, switching tube circuit and current-limiting resistance；Light
Detection circuit and switching tube circuit arrangement are on valve control device metering platelet, and controller and current-limiting resistance are arranged in the master of valve control device
On plate；The input terminal of the output terminal connecting valve pipe circuit of optical detection circuit, the output terminal of switching tube circuit is described is used for
The output terminal of the tamper detection circuit of valve control device metering platelet, controller are directly connected to described for valve control device by current-limiting resistance
The output terminal of the tamper detection circuit of platelet is measured, while controller is also directly connected to switching tube circuit；Optical detection circuit is used for
When valve control device metering platelet is detached from essentic-water-meter, detect the Lighting information of natural light and send detection signal to switching tube
Circuit；The detection signal output switch signal that switching tube circuit is sent according to optical detection circuit；Controller is defeated by current-limiting resistance
Go out to detect signal to output terminal, for detecting the broken string of the connection cables between the valve control device metering platelet and valve control device mainboard
State.
The optical detection circuit is phototriode detection circuit.
Circular hole on essentic-water-meter carries out sealant pouring and sealing after the valve control device metering platelet is installed, and circular hole is passed through lid
Plate blocks locking, so that during the optical detection circuit in the tamper detection circuit of valve control device metering platelet is in dark.
The described tamper detection circuit for valve control device metering platelet includes controller, pull-up resistor, phototriode,
Switching tube and current-limiting resistance；Pull-up resistor and phototriode composition phototriode detection circuit；The activity of phototriode
One end ground connection is held, the movable end other end of phototriode connects controller by pull-up resistor；The movable end of phototriode
The control terminal of the other end while connecting valve pipe；Movable end one end ground connection of switching tube, the movable end other end of switching tube is institute
State the output terminal of the tamper detection circuit for valve control device metering platelet；The tamper detection circuit of platelet is measured for valve control device
Output terminal also connects controller by current-limiting resistance.
This tamper detection circuit for valve control device metering platelet provided by the utility model, by phototriode and
Corresponding on-off circuit, can monitor whether valve control device metering platelet is disassembled or breaks in real time, and the utility model electricity
Road is simple and reliable, of low cost.
Description of the drawings
Fig. 1 is the functional block diagram of the utility model.
Fig. 2 is the circuit diagram of the utility model.
Specific embodiment
It is the functional block diagram of the utility model as shown in Figure 1：It is provided by the utility model this for the metering of valve control device
The tamper detection circuit of platelet, including controller, optical detection circuit, switching tube circuit and current-limiting resistance；It optical detection circuit and opens
Pipe circuit arrangement is closed on valve control device metering platelet, and controller and current-limiting resistance are arranged on the mainboard of valve control device；Light detects
The input terminal of the output terminal connecting valve pipe circuit of circuit, the output terminal of switching tube circuit is described small for the metering of valve control device
The output terminal of the tamper detection circuit of plate, controller are directly connected to described for the anti-of valve control device metering platelet by current-limiting resistance
The output terminal of slowdown monitoring circuit is opened and inspect, while controller is also directly connected to switching tube circuit；Optical detection circuit is used to measure in valve control device
When platelet is detached from essentic-water-meter, detect the Lighting information of natural light and send detection signal to switching tube circuit；Switching tube
The detection signal output switch signal that circuit is sent according to optical detection circuit；Controller exports detection signal by current-limiting resistance and arrives
Output terminal, for detecting the broken string state of the connection cables between the valve control device metering platelet and valve control device mainboard.
Valve control device metering platelet is placed in the circular hole of essentic-water-meter and carries out sealant pouring and sealing, and circular hole is hidden by cover board
Gear locking, so that during the optical detection circuit in the tamper detection circuit of valve control device metering platelet is in dark
It is illustrated in figure 2 the circuit diagram of the utility model：For the tamper detection circuit bag of valve control device metering platelet
Include controller, pull-up resistor R1, phototriode Q1, switching tube V1, current-limiting resistance R21 and filter capacitor C32；Pull-up resistor R1
Phototriode detection circuit is formed with phototriode Q1；Movable end one end of phototriode (is illustrated as phototriode
Emitter) ground connection, the movable end other end (collector for being illustrated as bright triode) of phototriode passes through pull-up resistor
R1 connections controller (first via signal of controller output is VCC signal)；The movable end other end of phototriode connects simultaneously
Connect the control terminal of switching tube V1；Movable end one end (emitter for being illustrated as switching tube V1) ground connection of switching tube, the work of switching tube
The moved end other end (collector for being illustrated as switching tube V1) is defeated for the tamper detection circuit that platelet is measured for valve control device
Outlet (output signal is M-CUT)；Output terminal for the tamper detection circuit of valve control device metering platelet also passes through current-limiting resistance
R21 connections controller (the second road signal EN-M of controller output).
Cut-off rule b in figure is represented：On the left of cut-off rule b circuit part (including pull-up resistor R1, phototriode Q1 and
Switching tube V1) it is optical detection circuit and switching tube circuit, it is arranged on valve control device metering platelet；Circuit on the right side of cut-off rule b
Partly it is arranged at (including current-limiting resistance R21, filter capacitor C32 and controller) on valve control device mainboard.
The course of work of foregoing circuit is as follows：
Under normal circumstances, the tamper detection circuit for valve control device metering platelet is located in water meter, and phototriode Q1 is not
Detect luminance signal, therefore the base stage electricity of the movable end cut-off of phototriode Q1, at this time switching tube V1 (V1 is triode)
It is flat that (or dragging down) is drawn high to the same level of signal VCC with controller output by resistance R1；When the VCC signal of controller output is
During high level, the base stage of switching tube V1 is high level at this time, emits the emitter and current collection of extremely low level, at this time switching tube V1
Pole turns on, and M-CUT signals are pulled low to low level at this time (no matter the EN-M signals of controller output are high level or low level)；
When valve control device metering platelet is removed, it is divided into the following two kinds situation at this time：
1) valve control device metering platelet is pulled out from installation site, but between valve control device metering platelet and valve control device mainboard
Connection cables do not disconnect：
At this point, since valve control device metering platelet is pulled out from installation site, photosensitive three on valve control device metering platelet
Pole pipe is illuminated, therefore phototriode turns on, and the control terminal (base stage) of switching tube V1 is pulled low to no matter low level (is controlled at this time
The VCC signal of device output processed is high level or low level), and the emitter of switching tube V1 is also equally low level, therefore switch
Pipe V1 ends；But be arranged on due to current-limiting resistance and controller on the mainboard of valve control device, and the mainboard can not individually detach valve
Device is controlled, therefore M-CUT exports the letter that the level of signal is then exported by the current-limiting resistance R1 on valve control device mainboard and controller at this time
Number EN-M is determined：If the signal EN-M output high level of controller output, M-CUT signals are high level；If EN-M outputs are low
Level, then M-CUT signals are low level.
2) valve control device metering platelet is pulled out from installation site, and the company between valve control device metering platelet and valve control device mainboard
Wiring cable disconnects：
At this point, since valve control device metering platelet is pulled out from installation site, photosensitive three on valve control device metering platelet
Pole pipe is illuminated, therefore phototriode turns on, and the control terminal (base stage) of switching tube V1 is pulled low to no matter low level (is controlled at this time
The VCC signal of device output processed is high level or low level), and the emitter of switching tube V1 is also equally low level, therefore switch
Pipe V1 ends；Simultaneously as there is provided the valve control device of optical detection circuit and switching tube circuit metering platelet with being provided with current limliting electricity
Connection cables between the valve control device mainboard of resistance, filter capacitor and controller disconnect, therefore the test point in figure (is illustrated as test
Signal) just it can not all be transferred on M-CUT signal wires, the level of M-CUT output signals is then by completely independent by limiting
Leakage resistance R1 and the signal EN-M of controller output are determined：If the signal EN-M output high level of controller output, M-CUT letters
Number be high level；If EN-M exports low level, M-CUT signals are low level.
3) valve control device metering platelet is not pulled out from installation site, and between valve control device metering platelet and valve control device mainboard
Connection cables disconnect：
At this point, since valve control device metering platelet is not pulled out from installation site, it is photosensitive on valve control device metering platelet
Triode is not illuminated, therefore phototriode ends；But due to being provided with the valve control of optical detection circuit and switching tube circuit
Device measure platelet and there is provided between the valve control device mainboard of current-limiting resistance, filter capacitor and controller connection cables disconnection, because
The output signal VCC and dead level of controller in this figure, and no matter just the test point (being illustrated as test signals) in figure
It can not all be transferred on M-CUT signal wires, the level of M-CUT output signals is then by completely independent by current-limiting resistance R1 and control
The signal EN-M of device output is determined：If the signal EN-M output high level of controller output, M-CUT signals are high level；If
EN-M exports low level, then M-CUT signals are low level.
By above-mentioned in normal state and abnormal for measuring the tamper detection circuit of platelet in Fig. 2 for valve control device
Course of work description under state, can obtain drawing a conclusion：
(do not break including being pulled out and directly break in order to correctly distinguish valve control device metering platelet and whether be removed
Line), in the specific implementation, the VCC signal and EN-M signals of controller output are required to as the output signal comprising high level, than
The high level signal or use pwm signal etc. that high level signal such as continuation exports temporarily when either detecting；Moreover, inspection
The state whether the M-CUT signals measured are removed with valve control device metering platelet is corresponding as follows：
If detecting M-CUT signals as low level signal, show that valve control device metering platelet is not removed；
If detecting M-CUT signals as high level signal, show that valve control device metering platelet is removed (including being pulled out not
Broken string and directly broken string).
Claims (4)
1. a kind of tamper detection circuit for valve control device metering platelet, valve control device metering platelet is placed on the circular hole of essentic-water-meter
In, it is characterised in that including controller, optical detection circuit, switching tube circuit and current-limiting resistance；Optical detection circuit and switching tube electricity
Road is arranged on valve control device metering platelet, and controller and current-limiting resistance are arranged on the mainboard of valve control device；Optical detection circuit
The input terminal of output terminal connecting valve pipe circuit, the output terminal of switching tube circuit is that the valve control device that is used for measures the anti-of platelet
The output terminal of slowdown monitoring circuit is opened and inspect, controller is directly connected to the tamper that platelet is measured for valve control device by current-limiting resistance and detects
The output terminal of circuit, while controller is also directly connected to switching tube circuit；Optical detection circuit is used to measure platelet quilt in valve control device
When being detached from essentic-water-meter, detect the Lighting information of natural light and send detection signal to switching tube circuit；Switching tube circuit root
The detection signal output switch signal sent according to optical detection circuit；Controller exports detection signal to output by current-limiting resistance
End, for detecting the broken string state of the connection cables between the valve control device metering platelet and valve control device mainboard.
2. the tamper detection circuit according to claim 1 for valve control device metering platelet, it is characterised in that the light
Detection circuit is phototriode detection circuit.
3. the tamper detection circuit according to claim 1 for valve control device metering platelet, it is characterised in that essentic-water-meter
On for installing the circular hole of valve control device metering platelet carry out sealant pouring and sealing, and circular hole is blocked into locking by cover board, thus
So that during the optical detection circuit in the tamper detection circuit of valve control device metering platelet is in dark.
4. the tamper detection circuit for valve control device metering platelet according to one of claims 1 to 3, it is characterised in that institute
The tamper detection circuit for valve control device metering platelet stated includes controller, pull-up resistor, phototriode, switching tube and limit
Leakage resistance；Pull-up resistor and phototriode composition phototriode detection circuit；Movable end one end ground connection of phototriode,
The movable end other end of phototriode connects controller by pull-up resistor；The movable end other end of phototriode connects simultaneously
Connect the control terminal of switching tube；Movable end one end ground connection of switching tube, the movable end other end of switching tube are used for valve control device to be described
Measure the output terminal of the tamper detection circuit of platelet；Output terminal for the tamper detection circuit of valve control device metering platelet also passes through
Current-limiting resistance connects controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721554160.6U CN207395833U (en) | 2017-11-20 | 2017-11-20 | For the tamper detection circuit of valve control device metering platelet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721554160.6U CN207395833U (en) | 2017-11-20 | 2017-11-20 | For the tamper detection circuit of valve control device metering platelet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207395833U true CN207395833U (en) | 2018-05-22 |
Family
ID=62323911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721554160.6U Active CN207395833U (en) | 2017-11-20 | 2017-11-20 | For the tamper detection circuit of valve control device metering platelet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207395833U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109253763A (en) * | 2018-11-21 | 2019-01-22 | 北京市燃气集团有限责任公司 | A kind of anti-theft type turbine flowmeter |
| CN109253770A (en) * | 2018-11-21 | 2019-01-22 | 北京市燃气集团有限责任公司 | A kind of anti-theft type rotz flowmeter |
-
2017
- 2017-11-20 CN CN201721554160.6U patent/CN207395833U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109253763A (en) * | 2018-11-21 | 2019-01-22 | 北京市燃气集团有限责任公司 | A kind of anti-theft type turbine flowmeter |
| CN109253770A (en) * | 2018-11-21 | 2019-01-22 | 北京市燃气集团有限责任公司 | A kind of anti-theft type rotz flowmeter |
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