CN206093118U - A valve driving circuit for metering device - Google Patents
A valve driving circuit for metering device Download PDFInfo
- Publication number
- CN206093118U CN206093118U CN201620803882.XU CN201620803882U CN206093118U CN 206093118 U CN206093118 U CN 206093118U CN 201620803882 U CN201620803882 U CN 201620803882U CN 206093118 U CN206093118 U CN 206093118U
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- valve
- controller
- place
- driving circuit
- circuit
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- Electrically Driven Valve-Operating Means (AREA)
- Indication Of The Valve Opening Or Closing Status (AREA)
Abstract
The utility model discloses a valve driving circuit for metering device, including controller and the integrated driver of H bridge, a IO pin of controller is connected to the low power consumption mode's of the integrated driver of H bridge drive pin, the 2nd IO pin of controller is connected to the first input pin of the integrated driver of H bridge, the 3rd IO pin of controller is connected to the second input pin of the integrated driver of H bridge, the integrated driver chip's of H bridge first output and second output connection valves's reduction gears. The utility model provides a valve driving circuit for metering device is through the integrated driver of H bridge as drive circuit driving valve's operation with close to valve through the maturity targets detection circuitry in place and detects the being location signal of valve, consequently the utility model discloses a this kind of a valve driving circuit for metering device, small, with low costs, simple structure, moreover because the circuit device is few, therefore the circuit reliability is high.
Description
Technical field
This utility model is specifically related to a kind of valve driving circuit for measuring instrument.
Background technology
As the measurement meters such as the development of economic technology, water meter, calorimeter have been widely used in all types of occasions.And
With automatic technology make rapid progress, measuring instrument automatically shut down and unlatching has become main flow.
By can be as a example by the intellectual water meter of automatic open-close lock：Water meter is internally provided with valve driving circuit, once water meter is owed
Take, then controller for water meter control valve drive circuit is driven to the valve on water inlet pipe, control valve shut-off, from
And stop the water supply of defaulting subscriber；Until after defaulting subscriber's payment, Intelligent water meter controller ability control valve drive circuit drives
Valve opening, recovers the water supply of user again.
But, the big polyphyly of valve driving circuit module of current measuring instrument adopts the discrete unit such as resistance, electric capacity, audion
Part builds, and it is more to there is device, poor reliability, and PCB cloth plate suqare is big, while not carrying the functions such as overcurrent protection.
Utility model content
The purpose of this utility model is to provide a kind of small volume, simple structure and circuit safety reliably based on
The valve driving circuit of amount instrument.
This valve driving circuit for measuring instrument that this utility model is provided, including controller, also including H bridge collection
Into driver；First I/O pins of controller are connected to the driving pin of the low-power consumption mode of H bridge integrated drives；Controller
The 2nd I/O pins be connected to the first input pin of H bridge integrated drives, the first input of the H bridges integrated drive is drawn
The driving pin that foot is opened for control valve；3rd I/O pins of controller are connected to the second input of H bridge integrated drives and draw
Foot, the second input pin of the H bridges integrated drive are the driving pin of control valve shut-off；H bridge integrated drive chips
The reducing gear of the first outfan and the second outfan connecting valve.
Model DRV8837 of described H bridge integrated drives.
The described valve driving circuit for measuring instrument also includes counter electromotive force leadage circuit；H bridge integrated drives
Reducing gear of the outfan by the counter electromotive force leadage circuit connecting valve.
The described valve driving circuit for measuring instrument also includes protective resistance；Protective resistance is connected to controller
Between the input of I/O pins and H bridge integrated drives, the pin for protecting controller and driver is not damaged by electrostatic
Evil.
The described valve driving circuit for measuring instrument also detects circuit in place including valve.The detection in place of valve
By the valve, signal detects that circuit connects the I/O pins of controller in place, receive the signal in place of valve for controller.
Described valve detects that circuit includes pull-up resistor and RC protection circuits in place.The signal in place of valve is by pull-up
Resistance enables signal in place with valve and is connected, and valve enables the I/O pins that signal connects controller in place；While valve is in place
Signal is connected to the I/O pins of controller by RC protection circuits.
The I/O pins of the controller of the signal in place of described reception valve are the I/O pins with interrupt function.
This valve driving circuit for measuring instrument that this utility model is provided, is used as by H bridge integrated drives
Drive circuit drives the operation and cut out of valve, and detects that circuit is carried out to the signal in place of valve in place by ripe valve
Detection, therefore this valve driving circuit for measuring instrument of the present utility model, small volume, low cost, simple structure, and
And as circuit devcie is few, therefore circuit reliability is high.
Description of the drawings
Fig. 1 is the circuit theory diagrams of valve driving circuit of the present utility model.
Fig. 2 is the circuit theory diagrams that valve of the present utility model detects circuit in place.
Specific embodiment
It is illustrated in figure 1 the circuit theory diagrams of valve driving circuit of the present utility model：The core electricity of valve driving circuit
Road is the H bridge integrated drives being made up of model DRV8837；1 foot of chip, 8 feet be connected positive source（Indicate in figure
V3P4）, while passing through filter capacitor（C27 is indicated in figure）Ground connection；2 feet and 3 feet of chip are output pin, and 2 feet and 3 feet pass through
Counter electromotive force leadage circuit（R16 and C38 is indicated in figure）The reducing gear of connecting valve afterwards；4 feet and 9 feet of chip are grounded；
First I/O pins of controller pass through the first protective resistance（R18 is indicated in figure）7 feet of connection chip, it is integrated as control H bridges
Driver is operated in the driving pin of low-power consumption mode；2nd I/O pins of controller pass through the second protective resistance（Indicate in figure
R4）- 6 foot of the first input pin of connection chip, 6 feet are the driving pin that controller control valve door is opened；3rd I/O of controller
Pin passes through the 3rd protective resistance（R5 is indicated in figure）- 5 foot of second input pin of connection chip, 5 feet are controller control valve
The driving pin of door shut-off.
It is illustrated in figure 2 the circuit theory diagrams that valve of the present utility model detects circuit in place：Valve（Indicate in figure
Motor）There are five tunnel wiring signals, wherein No. 1 pin and No. 2 pins connect 3 feet and 2 feet of H bridge integrated drives respectively；No. 3
Pin is grounded；No. 4 pins are shut pull-up resistor by valve and enable signal with the detection in place of valve（EN-Check is indicated in figure）
Connection, while also closing protection circuit by valve（R33 and C29 is indicated in figure）Output valve closes detection signal in place（Figure acceptance of the bid
Show Motor-C）To controller；Likewise, valve reaches a detection signal（I.e. No. 5 pins）Pull-up resistor and valve are opened by valve
The detection in place of door enables signal connection, while also opening protection circuit by valve（R32 and C28 is indicated in figure）Output valve is opened
Detection signal in place（Motor-O is indicated in figure）To controller；The detection in place of valve enables signal and is equally given by controller.
The course of work of the present utility model is：Not during switch valve state, output Ctrl-Motor-Sleep, Ctrl- of MCU
Motor-Open, Ctrl-Motor-Close, En-Check are low level.The input Motor-O and Motor-C of MCU is also equal
For low level.The output Power-L1 of valve driver element is low level as Power-L2.
During valve opening, Ctrl-Motor-Sleep and Ctrl-Motor-Open is output high level, Ctrl-Motor-Close
Output low level.Power-L1 is output as high level, and Power-L2 is output as high level, reducing gear in Power-L1 and
The DC level of Power-L2 carries out valve opening action under driving.During valve opening, En-Check is output as high level simultaneously.Valve
When not in place, Motor-O and Motor-C are high level.When valve opening in place when, reducing gear draws Motor-O for low level.
MCU produces interruption, middle stopping valve when detecting the trailing edge of Motor-O.Into not switch valve state.
When closing valve, Ctrl-Motor-Sleep and Ctrl-Motor-Close is output high level, Ctrl-Motor-Open
Output low level.Power-L2 is output as high level, and Power-L1 is output as high level, reducing gear in Power-L1 and
The DC level of Power-L2 carries out pass valve events under driving.During valve is closed, En-Check is output as high level simultaneously.Valve
When not in place, Motor-O and Motor-C are high level.When valve is closed in place, reducing gear draws Motor-C for low level.
MCU produces interruption when detecting the trailing edge of Motor-C, stop to close valve.Into not switch valve state.
Claims (7)
1. a kind of valve driving circuit for measuring instrument, including controller, it is characterised in that also including H bridge integrated drivings
Device；First I/O pins of controller are connected to the driving pin of the low-power consumption mode of H bridge integrated drives；The second of controller
I/O pins are connected to the first input pin of H bridge integrated drives, and the first input pin of the H bridges integrated drive is control
The driving pin that valve processed is opened；3rd I/O pins of controller are connected to the second input pin of H bridge integrated drives, institute
The second input pin for stating H bridge integrated drives is the driving pin of control valve shut-off；The first of H bridge integrated drive chips is defeated
Go out the reducing gear of end and the second outfan connecting valve.
2. the valve driving circuit for measuring instrument according to claim 1, it is characterised in that the described integrated drive of H bridges
Model DRV8837 of dynamic device.
3. the valve driving circuit for measuring instrument according to claim 2, it is characterised in that described for measuring
The valve driving circuit of instrument also includes counter electromotive force leadage circuit；The outfan of H bridge integrated drives is by described anti-electronic
The reducing gear of gesture leadage circuit connecting valve.
4. the valve driving circuit for measuring instrument according to claim 2, it is characterised in that described for measuring
The valve driving circuit of instrument also includes protective resistance；Protective resistance is connected to the I/O pins and H bridge integrated drives of controller
Input between, the pin for protecting controller and driver is not damaged by electrostatic.
5. the valve driving circuit for measuring instrument according to one of claim 1 ~ 4, it is characterised in that described use
Circuit is detected in place including valve also in the valve driving circuit of measuring instrument；The detection signal in place of valve passes through the valve
Detect that circuit connects the I/O pins of controller, receives the signal in place of valve for controller in place.
6. the valve driving circuit for measuring instrument according to claim 5, it is characterised in that described valve is in place
Detection circuit includes pull-up resistor and RC protection circuits；The signal in place of valve enables signal in place by pull-up resistor and valve
Connection, valve enable the I/O pins that signal connects controller in place；The signal in place of valve is connected by RC protection circuits simultaneously
To the I/O pins of controller.
7. the valve driving circuit for measuring instrument according to claim 6, it is characterised in that described reception valve
The I/O pins of controller of signal in place be the I/O pins with interrupt function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620803882.XU CN206093118U (en) | 2016-07-28 | 2016-07-28 | A valve driving circuit for metering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620803882.XU CN206093118U (en) | 2016-07-28 | 2016-07-28 | A valve driving circuit for metering device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206093118U true CN206093118U (en) | 2017-04-12 |
Family
ID=58467807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620803882.XU Active CN206093118U (en) | 2016-07-28 | 2016-07-28 | A valve driving circuit for metering device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206093118U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108808626A (en) * | 2018-06-28 | 2018-11-13 | 浙江威星智能仪表股份有限公司 | A kind of electrostatic discharge protective circuit of protection product valve steady operation |
-
2016
- 2016-07-28 CN CN201620803882.XU patent/CN206093118U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108808626A (en) * | 2018-06-28 | 2018-11-13 | 浙江威星智能仪表股份有限公司 | A kind of electrostatic discharge protective circuit of protection product valve steady operation |
| CN108808626B (en) * | 2018-06-28 | 2024-04-16 | 浙江威星智能仪表股份有限公司 | Electrostatic protection circuit for protecting stable operation of product valve |
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