CN205843592U - Valve for measuring instrument puts in place testing circuit - Google Patents
Valve for measuring instrument puts in place testing circuit Download PDFInfo
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- CN205843592U CN205843592U CN201620803877.9U CN201620803877U CN205843592U CN 205843592 U CN205843592 U CN 205843592U CN 201620803877 U CN201620803877 U CN 201620803877U CN 205843592 U CN205843592 U CN 205843592U
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- valve
- reducing gear
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- place
- controller
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Abstract
The utility model discloses a kind of valve for measuring instrument to put in place testing circuit, including controller and current sampling circuit；The I/O pin of the controller power supply by current sampling circuit connecting valve reducing gear；The load current of current sampling circuit Sampler valves reducing gear, and sampled signal is sent controller；According to the current signal of sampling, controller judges whether valve motion puts in place.This utility model is by the supply current of current sample module detection valve reducing gear, once valve switch puts in place, valve reducing gear is by stall, thus the supply current of valve reducing gear will increase, controller can complete, by judging that the supply current of valve reducing gear changes, the detection that valve switch puts in place.This utility model circuit structure is simple and reliable, with low cost, and testing result true and accurate, it is possible to the result of detection is effectively ensured.
Description
Technical field
This utility model is specifically related to a kind of valve for measuring instrument and puts in place testing circuit.
Background technology
Along with development and the raising of people's living standard of national economy technology, intelligent metering instrument has been widely used for
All kinds of metering occasions.
As a example by intellectual water meter: intellectual water meter possesses arrearage automatic shutoff function, and it is by being arranged on main water inlet tube
Valve realize cutting off the water supply and supplying water of water inlet pipe.Therefore, can the valve of intellectual water meter reliably switch to put in place and just seem non-the normally off
Key, which dictates that whether intellectual water meter can normally use.The measuring instrument of domestic a lot of manufacturer cannot detect valve switch
Whether putting in place, the product of indivedual producers uses four-wire system mechanical type and puts in place detection technique.If using four-wire system machinery to arrive
Position detection mode, when valve forwards to, collision machine contact, thus realize shutting down.It will be apparent that this mode structure is complicated,
Poor reliability, it is more difficult to realize the most waterproof and antirust, easy misoperation.
Utility model content
The purpose of this utility model is to provide a kind of valve detecting reliably, implement to be simply to measuring instrument to put in place
Testing circuit.
This valve for measuring instrument that this utility model provides puts in place testing circuit, including controller, also includes
Current sampling circuit；The I/O pin of the controller power supply by current sampling circuit connecting valve reducing gear；Electric current is adopted
The load current of sample circuit sampling valve reducing gear, and sampled signal is sent controller；Controller is according to the electric current of sampling
Signal judges whether valve motion puts in place.
The I/O pin of described controller is the I/O pin possessing AD sample conversion.
Described current sampling circuit is that precision resistance is connected in the electric power loop of reducing gear realization；Valve reductor
The power line of structure passes through described precision resistance ground connection；The I/O pin of controller be connected to precision resistance and valve reducing gear it
Between, the voltage at sampling precision resistance two ends, and judge to flow through the electric current of precision resistance according to magnitude of voltage, thus judge valve motion
Whether put in place.
The resistance of described precision resistance is 0.5 Ω, and occurrence then can amplify electricity according to locked rotor current value size and signal
The amplification on road selects the resistance of precision resistance.
Described current sampling circuit also includes signal amplification circuit；The input of signal amplification circuit is connected to accurate electricity
Between resistance and valve reducing gear, after the magnitude of voltage of Sampling Machine cipher telegram resistance, and the magnitude of voltage amplification that will sample, output is arrived
The I/O pin of controller.
This valve for measuring instrument that this utility model provides puts in place testing circuit, detects valve by precision resistance
The supply current of door reducing gear, once valve switch puts in place, and valve reducing gear is by stall, thus the confession of valve reducing gear
Electricity electric current will increase so that the magnitude of voltage on precision resistance increases, and controller is again by detecting the magnitude of voltage of precision resistance
Complete the detection that valve switch puts in place.This utility model circuit structure is simple and reliable, with low cost, and testing result is the most accurate
Really, it is possible to the result of detection is effectively ensured.
Accompanying drawing explanation
Fig. 1 is circuit theory schematic diagram of the present utility model.
Detailed description of the invention
It is illustrated in figure 1 circuit theory schematic diagram of the present utility model: it is this for gauge that this utility model provides
The valve of table puts in place testing circuit, including controller and current sampling circuit；The I/O pin possessing AD sample conversion of controller
Power supply by current sampling circuit connecting valve reducing gear；The load of current sampling circuit Sampler valves reducing gear
Electric current, and sampled signal is sent controller；According to the current signal of sampling, controller judges whether valve motion puts in place.
The load current of valve reducing gear can direct sample rate current, it is also possible to indirectly adopt by the way of sampled voltage
Sample load current.In the present embodiment, current sampling circuit uses precision resistance；The power line of valve reducing gear is by described essence
Cipher telegram resistance R ground connection；The I/O pin of controller is connected between precision resistance and valve reducing gear, the electricity of sampling precision resistance
Pressure, and judge to flow through the electric current of precision resistance according to magnitude of voltage, thus judge whether valve motion puts in place.
The resistance of precision resistance can elect 0.5 Ω as, it is also possible to for other values.
Signal amplification circuit is connected between accurate sampling resistor and controller, and the input of signal amplification circuit is connected to
Between precision resistance and valve reducing gear, after the magnitude of voltage of Sampling Machine cipher telegram resistance, and the magnitude of voltage amplification that will sample,
Output is to the I/O pin of controller.The purpose of signal amplification circuit is to be amplified the current signal flowing through sampling resistor,
Thus improve precision and the accuracy of control.
Claims (5)
1. put in place a testing circuit for the valve of measuring instrument, including controller, it is characterised in that also include current sample
Circuit；The I/O pin of the controller power supply by current sampling circuit connecting valve reducing gear；Current sampling circuit is adopted
The load current of sample valve reducing gear, and sampled signal is sent controller；Controller judges according to the current signal of sampling
Whether valve motion puts in place.
Valve for measuring instrument the most according to claim 1 puts in place testing circuit, it is characterised in that described control
The I/O pin of device is the I/O pin possessing AD sample conversion.
Valve for measuring instrument the most according to claim 1 and 2 puts in place testing circuit, it is characterised in that described electricity
Stream sample circuit is precision resistance；The power line of valve reducing gear passes through described precision resistance ground connection；The I/O pin of controller
It is connected between precision resistance and valve reducing gear, the voltage of sampling precision resistance, and judges to flow through precision according to magnitude of voltage
The electric current of resistance, thus judge whether valve motion puts in place.
Valve for measuring instrument the most according to claim 3 puts in place testing circuit, it is characterised in that described precision
The resistance of resistance is 0.5 Ω.
Valve for measuring instrument the most according to claim 4 puts in place testing circuit, it is characterised in that described electric current
Sample circuit also includes signal amplification circuit；The input of signal amplification circuit be connected to precision resistance and valve reducing gear it
Between, after the magnitude of voltage of Sampling Machine cipher telegram resistance, and the magnitude of voltage amplification that will sample, the I/O pin of output to controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620803877.9U CN205843592U (en) | 2016-07-28 | 2016-07-28 | Valve for measuring instrument puts in place testing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620803877.9U CN205843592U (en) | 2016-07-28 | 2016-07-28 | Valve for measuring instrument puts in place testing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205843592U true CN205843592U (en) | 2016-12-28 |
Family
ID=57640929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620803877.9U Active CN205843592U (en) | 2016-07-28 | 2016-07-28 | Valve for measuring instrument puts in place testing circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205843592U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109931963A (en) * | 2019-02-01 | 2019-06-25 | 奥佳华智能健康科技集团股份有限公司 | A kind of shared nursing bed cabinet shutdown detection structure |
-
2016
- 2016-07-28 CN CN201620803877.9U patent/CN205843592U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109931963A (en) * | 2019-02-01 | 2019-06-25 | 奥佳华智能健康科技集团股份有限公司 | A kind of shared nursing bed cabinet shutdown detection structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |