CN108646176A - Detection circuit for electromagnetic valve and its device - Google Patents
Detection circuit for electromagnetic valve and its device Download PDFInfo
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- CN108646176A CN108646176A CN201810685553.3A CN201810685553A CN108646176A CN 108646176 A CN108646176 A CN 108646176A CN 201810685553 A CN201810685553 A CN 201810685553A CN 108646176 A CN108646176 A CN 108646176A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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- General Physics & Mathematics (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
It includes power circuit and detection circuit that the present invention, which discloses a kind of detection circuit for electromagnetic valve and detection apparatus for electromagnetic valve, detection circuit for electromagnetic valve,.First power output end of power circuit and the first power input of detection circuit connect, and the second source output end of power circuit and the second source input terminal of detection circuit connect.The first end of the first test side of detection circuit and solenoid valve connects, and the second test side of detection circuit and the second end of solenoid valve connect.Power circuit provides the first power supply and the second power supply for detection circuit.Detection circuit detects the frequency values range of solenoid valve, and the frequency values range of solenoid valve and predetermined frequency value range are compared, to judge the on off state of solenoid valve.The present invention solves the problems, such as that detection error rate is higher when detection circuit for electromagnetic valve detection electromagnetic valve switch state in the prior art.
Description
Technical field
The present invention relates to Solenoid Valve Technology fields, more particularly to detection circuit for electromagnetic valve and its device.
Background technology
It is electromagnetically controlled industrial equipment to show solenoid valve (Electromagnetic valve), is oneself for controlling fluid
Dynamicization base components can adjust direction, flow, speed and the other parameters of medium in industrial control system.Electromagnetism
There is closed chamber in valve, is provided with through-hole in different location, each hole connects different pipelines, is piston among chamber, and two sides is two
Which side the magnet coil energization valve body of block electromagnet, which face will be attracted to, and opened or closed by the movement of application valve body
Different fluid bores is closed, fluid will enter different pipelines.To realize fluid disengaging control.And solenoid valve this
Kind of operation principle makes its will be used wider and wider in daily life.The on off state of solenoid valve is detected to control its
Switch also becomes a very important ring.
But because solenoid valve belongs to physical switch, medium itself is non-conductive, so can not be by directly controlling switch
State, so needing to detect simultaneously early warning.The detection method of the open/close state of existing combustion gas emergency cut-off magnetic valve is：
One magnet is installed on the moving assembly of solenoid valve center, and a tongue tube is installed on non-moving component, open when solenoid valve or
When the state that person is closed, the distance between magnet and tongue tube are changed, and on and off two states occurs in such tongue tube,
In this way come to detect solenoid valve be to open or close state.
This detection method has the disadvantage that：
1, when moving assembly movement speed is too fast because of the displacement frequent occurrence of inertia problem magnet, detection will not in this way
It is accurate.
When 2, being passed through the gas or liquid with pressure in solenoid valve, moving assembly not completely in place, such tongue tube
Also it is easy to be attracted.
3, inherently there are one prodigious electromagnet, when the solenoid is energized magnetic field energy to make tongue tube malfunction for band for solenoid valve
Make.
4, all magnet are affected by temperature it is obvious that magnet is often ineffective under high temperature environment, keep detection inaccurate.
Invention content
The main object of the present invention is to propose a kind of detection circuit for electromagnetic valve, it is intended to solve solenoid valve in the prior art and detect
Detection error rate higher problem when circuit detects electromagnetic valve switch state.
To achieve the above object, the present invention proposes that a kind of detection circuit for electromagnetic valve, the detection circuit for electromagnetic valve include electricity
Source circuit and detection circuit；
First power output end of the power circuit is connect with the first power input of the detection circuit, the electricity
The second source output end of source circuit is connect with the second source input terminal of the detection circuit；The detection circuit first detects
End is connect with the first end of the solenoid valve, and the second test side of the detection circuit is connect with the second end of the solenoid valve；
The power circuit, for providing the first power supply and the second power supply for the detection circuit；
The detection circuit, the frequency values for detecting the solenoid valve, and according to the frequency values of the solenoid valve and in advance
If judgment rule judge the working condition of solenoid valve.
Preferably, the detection circuit determines the working condition of solenoid valve according to following judgment rule：
FDG=| FD-FG|；
FDK=| FD-FK|；
Wherein, FDFor the frequency values of the solenoid valve of detection, FGFor the frequency values of preset solenoid valve open state, FK
For the frequency values of preset electromagnetism valve closing state；
Work as FDGMore than FDKWhen, solenoid valve is in off state；
Work as FDGLess than FDKWhen, solenoid valve is open state.
Preferably, the detection circuit includes oscillating circuit, amplifying circuit and chip circuit, the power supply of the oscillating circuit
Input terminal is connect with the first power output end of the power circuit, the output end of the oscillating circuit respectively with the solenoid valve
First end, the amplifying circuit input terminal and the oscillating circuit input/output terminal connection, the oscillating circuit it is defeated
Enter end to connect with the second end of the solenoid valve；The output end of the amplifying circuit and the detection signal of the chip circuit input
End connection, the power end of the amplifying circuit are connect with the second source output end of the power circuit.
Preferably, the oscillating circuit includes first resistor, second resistance, 3rd resistor, the 4th resistance, the one or three pole
Pipe, the first capacitance, the second capacitance, third capacitance, the 4th capacitance and the first inductance, the first end of the first resistor and described the
The first end of two resistance connects, the connecting node of the first resistor and the second resistance and the first electricity of the power circuit
Source output terminal connects, the second end of the first resistor respectively with the first end of first capacitance, the 3rd resistor the
The base stage of one end and first triode connects；The second end of first capacitance, the second end of first inductance and institute
State the first end connection of the 4th capacitance；The first end of second capacitance respectively with the second end of the second resistance and described
The collector of one triode connects, and the second end of second capacitance is the output end of the oscillating circuit；One or three pole
The emitter of pipe is connect with the first end of the first end of the 4th resistance and the third capacitance respectively；The 3rd resistor
Second end, the second end of the 4th resistance, the second end of the third capacitance, the first end of first inductance and the electricity
The first end of magnet valve connects, and the connecting node of first inductance and the solenoid valve is grounded；The second end of 4th capacitance
For the input/output terminal of the oscillating circuit.
Preferably, the amplifying circuit includes the 5th resistance, the 6th resistance, the 7th resistance and the second triode, and described the
The first end of five resistance is connect with the first end of the 6th resistance, the connecting node of the 5th resistance and the 6th resistance
For the power end of the amplifying circuit, the second end of the 5th resistance respectively with the first end of the 7th resistance and described
The base stage of two triodes connects, and the connecting node of the 5th resistance, the 7th resistance and second triode is described
Input amplifier；The collector of second triode is connect with the second end of the 6th resistance, the two or three pole
Pipe and the output end that the connecting node of the 6th resistance is the amplifying circuit, the emitter of second triode and described
The second end of 7th resistance is grounded.
Preferably, the chip circuit includes the first chip circuit and the second chip circuit, first chip circuit
The power end of power end and second chip circuit is connect with the second source output end of the power circuit, and described first
The detection signal input part of chip circuit is connect with the output end of the amplifying circuit, the detection signal of first chip circuit
Output end is connect with the external interrupt end of second chip circuit.
Preferably, the detection circuit for electromagnetic valve further includes key circuit, the first signal output end of the key circuit
Connect with the first push button signalling test side of second chip circuit, the second signal output end of the key circuit with it is described
Second push button signalling test side of the second chip circuit connects.
Preferably, the detection circuit for electromagnetic valve further includes indicator light circuit, the power input of the indicator light circuit
It is connect with the second source output end of the power circuit, the first control signal input terminal of the indicator light circuit and described the
The first control signal output ends of two chip circuits connects, the second control signal input terminal of the indicator light circuit and described the
The second control signal output end of two chip circuits connects；The power input of second chip circuit and the power circuit
Second source output end connection.
Preferably, the indicator light circuit includes the tenth resistance, eleventh resistor, twelfth resistor, thirteenth resistor, the
One metal-oxide-semiconductor, the second metal-oxide-semiconductor, the first light emitting diode and the second light emitting diode, the first end of the tenth resistance and described
The grid of one metal-oxide-semiconductor is connect with the first control signal output end of second chip circuit, and the second of the tenth resistance
The source electrode of end and first metal-oxide-semiconductor is connect with the second source output end of the power circuit；The eleventh resistor
First end is connect with the drain electrode of first metal-oxide-semiconductor, the second end of the eleventh resistor and first light emitting diode
Anode connects, the minus earth of first light emitting diode；The first end of the twelfth resistor and second metal-oxide-semiconductor
Grid is connect with the second control signal output end of second chip circuit, the second end of the twelfth resistor and described
The source electrode of second metal-oxide-semiconductor is connect with the second source output end of the power circuit；The first end of the thirteenth resistor with
The drain electrode of second metal-oxide-semiconductor connects, and the second end of the thirteenth resistor is connect with the anode of second light emitting diode,
The minus earth of second light emitting diode.
To achieve the above object, the present invention also proposes a kind of detection apparatus for electromagnetic valve, including solenoid valve as described above inspection
Slowdown monitoring circuit.
Technical solution of the present invention is by using the mode of power circuit and the common coordinative role of detection circuit, the power supply electricity
First power output end on road is connect with the first power input of the detection circuit, and the second source of the power circuit is defeated
Outlet is connect with the second source input terminal of the detection circuit.The of the first test side of the detection circuit and the solenoid valve
One end connects, and the second test side of the detection circuit is connect with the second end of the solenoid valve.Wherein, the power circuit is
The detection circuit provides the first power supply and the second power supply.The detection circuit detects the frequency of the solenoid valve
It is worth, and judges the working condition of solenoid valve according to the frequency values of the solenoid valve and preset judgment rule.The above invention solves
Detection error rate higher problem when detection circuit for electromagnetic valve detection electromagnetic valve switch state in the prior art, improves electromagnetism
Valve detection circuit detects accuracy when electromagnetic valve switch state.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
The structure shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the module diagram of an embodiment of detection circuit for electromagnetic valve of the present invention；
Fig. 2 is the detection circuit schematic diagram of an embodiment of detection circuit for electromagnetic valve of the present invention；
Fig. 3 is chip circuit, key circuit and the indicator light circuit of an embodiment of detection circuit for electromagnetic valve of the present invention
Circuit diagram.
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art obtained without creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
Detection error rate is higher when in order to solve detection circuit for electromagnetic valve detection electromagnetic valve switch state in the prior art
Problem.Referring to Fig.1, in one embodiment, the present invention proposes a kind of detection circuit for electromagnetic valve, and detection circuit for electromagnetic valve includes power supply
Circuit 101 and detection circuit 102.First power output end of power circuit 101 and the first power input of detection circuit 102
Connection, the second source output end of power circuit 101 are connect with the second source input terminal of detection circuit 102.Detection circuit 102
First test side is connect with the first end of solenoid valve 103, the second end of the second test side and solenoid valve 103 of detection circuit 102
Connection.In the present invention, it is notable that the solenoid valve 103 of access detection circuit for electromagnetic valve 102 is defaulted as solenoid valve 103
In coil, do not repeating hereafter.
Wherein, power circuit 101 is that detection circuit 102 provides the first power supply and the second power supply.Detection circuit
The frequency values of 102 detection solenoid valves 103, and judge solenoid valve according to the frequency values of solenoid valve 103 and preset judgment rule
Working condition.
In above-described embodiment, the voltage of the first power output end of power circuit 101 is 12V, the second of power circuit 101
The voltage of power output end is 5V, and when selecting arbitrary a solenoid valve 103 on the market, detection circuit 102 measures electromagnetism in advance
103 closed state frequency value of frequency values and solenoid valve when 103 open state of valve, at this point, frequency when 103 open state of solenoid valve
Rate value and 103 closed state frequency value of solenoid valve have determining magnitude relationship, and detection circuit 102 is by testing multiple solenoid valves
The experiment of 103 frequency values proves, the 103 closed state frequency value of frequency values and solenoid valve when 103 open state of solenoid valve
The difference of frequency values is more than 100HZ, so, open state and the closing of solenoid valve can be preferably distinguished according to the difference of frequency values
State.
Detection circuit can determine the working condition of solenoid valve according to following judgment rule：
FDG=| FD-FG|；
FDK=| FD-FK|；
Wherein, FDFor the frequency values of the solenoid valve of detection, FGFor the frequency values of preset solenoid valve open state, FK
For the frequency values of preset electromagnetism valve closing state；
Work as FDGMore than FDKWhen, solenoid valve is in off state；
Work as FDGLess than FDKWhen, solenoid valve is open state.
And because experiment proves, in above-described embodiment, frequency values when 103 open state of solenoid valve and solenoid valve 103
The difference of the frequency values of closed state frequency value is more than 100HZ, and when solenoid valve 103 is in open state or closed state,
The frequency detected drifts in 30HZ or so, and therefore, estimate of situation at this time is it is not intended that FDGEqual to FDKThe case where.
Optionally, with reference to Fig. 2, in another embodiment, detection circuit 102 includes oscillating circuit 1021, amplifying circuit
1022 and chip circuit 1023, the power input V1 of oscillating circuit 1021 connects with the first power output end of power circuit 101
Connect, the output end of oscillating circuit 1021 respectively with the first end of solenoid valve 103, the input terminal and oscillating circuit of amplifying circuit 1022
Input/output terminal connection, the input terminal of oscillating circuit 1021 connect with the second end of solenoid valve 103；Amplifying circuit 1022
Output end INA1- is connect with the detection signal input part of chip circuit 1023, power end V2 and the power supply electricity of amplifying circuit 1022
The second source output end on road 101 connects.
Wherein, oscillating circuit 1021 is for the sine wave that oscillating circuit 1021 itself generates to be amplified, and exports and give
Solenoid valve 103 and oscillating circuit 1021, at this time solenoid valve 103 and oscillating circuit 1021 form complete LC oscillating circuits, LC shakes
Circuit is swung to extract the sine wave that itself is generated and export to oscillating circuit 1021 and amplifying circuit 1022, output to oscillation
The sine wave of circuit 1021 is input to by amplification in LC oscillating circuits again, thus can compensate for the loss of the LC oscillating circuit courses of work
Part, to stablize LC oscillating circuits output signal amplitude and frequency.The sine wave that LC oscillating circuits generate itself
Extract, the process of the sine wave of amplified compensation LC oscillating circuit courses of work loss be one of LC oscillating circuits just
Feedback procedure.Meanwhile output directly amplified to the part of amplifying circuit 1022 after exported again to chip circuit 1023 to detect
And judge the on off state of solenoid valve 103, at this point, because the amplitude for the sine wave that LC oscillating circuits generate is not high enough, it is not easy to
It measures, goes to improve the amplitude of sine wave so to pass through amplifying circuit 1022.What chip circuit 1023 at this time acquired is sinusoidal
The rising edge of wave and lower liter edge calculate frequency to record the periodicity of sine wave, are judged using preset judgment rule
The on off state of solenoid valve 103.
Optionally, in another embodiment, oscillating circuit 1021 includes first resistor R1, second resistance R2,3rd resistor
R3, the 4th resistance R4, the first triode Q1, the first capacitance C1, the second capacitance C2, third capacitance C3, the first inductance L1 and the 4th
The first end of capacitance C4, first resistor R1 are connect with the first end of second resistance R2, the company of first resistor R1 and second resistance R2
It connects node to connect with the first power output end of power circuit 101, the second end of first resistor R1 is respectively with the first capacitance C1's
The base stage of first end, the first end of 3rd resistor R3 and the first triode Q1 connects；The second end of first capacitance C1, the first inductance
The second end of L1 is connect with the first end of the 4th capacitance C4；The first end of the second capacitance C2 second end with second resistance R2 respectively
And first triode Q1 collector connection, the second end of the second capacitance C2 is the output end of oscillating circuit 1021；One or three pole
The emitter of pipe Q1 is connect with the first end of the first end of the 4th resistance R4 and third capacitance C3 respectively；The second of 3rd resistor R3
End, the second end of the 4th resistance R4, the second end of third capacitance C3, the first inductance L1 first end and solenoid valve 103 first
The connecting node of end connection, the first inductance L1 and solenoid valve 103 is grounded；The second end of 4th capacitance C4 is oscillating circuit 1021
Input/output terminal.
Wherein, the power supply that power circuit 101 exports flows into the base stage and third electricity of the first triode Q1 through first resistor R1
R3 is hindered, the power supply that power circuit 101 exports also flows into the collector of the first triode Q1 through second resistance R2, due to point of resistance
Pressure acts on, and voltage difference is formed between the base stage of the first triode Q1, collector and emitter, to the first triode of conducting
Q1, power supply flow through the oscillation action of the first inductance L1, the 4th capacitance C4 and solenoid valve 103, generate sine wave.At this point, oscillation electricity
Road 1021 is under magnifying state, and the signal that oscillating circuit 1021 exports is amplified by the first triode Q1 and flows through the second electricity
Hold C2 back in oscillating circuit 1021, it is possible thereby in stable oscillating circuit 1021 signal amplitude and frequency, above-mentioned implementation
In example, the first inductance L1 and the 4th capacitance C4 need and solenoid valve 103 and the first triode Q1 collective effects, composition LC oscillations
Circuit makes the signal of output can be by subsequent amplification circuitry to can be only achieved the effect for filtering off the direct current signal in input signal
1022 processing, and since generated inductance is in different size in switching process for solenoid valve 103, so LC oscillating circuits
Output frequency also has corresponding difference, thus after the output frequency for measuring LC oscillating circuits, passes through corresponding judgment rule
Judge, so that it may to obtain the on off state of solenoid valve 103.
Optionally, amplifying circuit 1022 includes the 5th resistance R5, the 6th resistance R6, the 7th resistance R7 and the second triode
The first end of Q2, the 5th resistance R5 are connect with the first end of the 6th resistance R6, the connection section of the 5th resistance R5 and the 6th resistance R6
Point is the power end V2 of amplifying circuit 1022, the second end of the 5th resistance R5 first end and the two or three with the 7th resistance R7 respectively
The base stage of pole pipe Q2 connects, and the connecting node of the 5th resistance R5, the 7th resistance R7 and the second triode Q2 are amplifying circuit 1022
Input terminal；The collector of second triode Q2 is connect with the second end of the 6th resistance R6, the second triode Q2 and the 6th resistance
The connecting node of R6 is the output end INA1- of amplifying circuit 1022, the of the emitter of the second triode Q2 and the 7th resistance R7
Two ends are grounded.
Wherein, the power supply for flowing into the power end V2 of amplifying circuit 1022 flows into the base of the second triode Q2 through the 5th resistance R5
Pole, and through the collector of the 6th the second triodes of resistance R6 Q2, and the emitter of the second triode Q2 is grounded, thus the two or three
The base stage of pole pipe Q2, collector and emitter form voltage difference, so that the second triode Q2 conductings, the second triode Q2 will
The sine wave signal for flowing into amplifying circuit 1022 carries out secondary amplification, with the amplitude of the sine wave signal of enhancing output.
Optionally, with reference to Fig. 3, chip circuit 1023 includes the first chip circuit 10231 and the second chip circuit 10232,
The power end V4 of the power end V3 of first chip circuit 10231 and the second chip circuit 10232 with power circuit 101 second
Power output end connects, and the detection signal input part of the first chip circuit 10231 connects with the output end INA1- of amplifying circuit 1022
It connects, the detection signal output end of the first chip circuit 10231 is connect with the external interrupt end of the second chip circuit 10232.
In above-described embodiment, the first chip circuit 10231 will input sine wave signal therein and be rectified into square-wave signal simultaneously
Output to the second chip circuit 10232, the second chip circuit 10232 is remembered by detecting rising edge and the failing edge of square-wave signal
The periodicity for recording square wave, thereby determines that the frequency values of square wave, and the on off state of solenoid valve 103 is determined by frequency values.It is worth note
Meaning, high-resolution timer built in the second chip circuit 10232, therefore can ensure that the periodicity of the square wave of record is accurate
Property, reduce measurement error.
Optionally, the first chip circuit 10231 includes the first chip U1, the 8th resistance R8 and the 9th resistance R9, the first core
The supply pin VDD1 of piece U1 is connect with the second source output end of power circuit 101, and the supply pin VDD1 of the first chip U1 is the
The detection signal input pin INA2- of the power end of one chip circuit 10231, the first chip U1 is the first chip circuit 10231
Signal input part is detected, the detection signal output pin OUTA of the first chip U1 is connect with the first end of the 8th resistance R8, the first core
The grounding leg GND and the first end of the 9th resistance R9 of piece U1 is grounded, the external output pin INA+ of detection signal of the first chip U1
It is connect respectively with the second end of the second end of the 8th resistance R8 and the 9th resistance R9.
In above-described embodiment, the first chip U1 is preferably LM393, at this point, the first chip U1, the 8th resistance R8 and the 9th electricity
Resistance R9 forms Schmidt trigger by above-mentioned connection type, and the sine wave signal for inputting the first chip circuit 10231 is rectified into
Square-wave signal exports.
Optionally, the second chip circuit 10232 includes the second chip U2 and the 5th capacitance C5, the resetting pin of the second chip U2
RST is connect with the first end of the 5th capacitance C5, and the supply pin VDD2 of the second chip U2 is exported with the second source of power circuit 101
End connection, the first push button signalling detection foot K1 of the second chip U2 are the first push button signalling detection of the second chip circuit 10232
End, the second push button signalling detection foot K2 of the second chip U2 are the second push button signalling test side of the second chip circuit 10232, the
The external interrupt foot CAP of two chip U2 is the external interrupt end of the second chip circuit 10232, the first control letter of the second chip U2
Number output pin ON is the first control signal output end of the second chip circuit 10232, and the second control signal of the second chip U2 is defeated
Go out the second control signal output end that foot OFF is the second chip circuit 10232, the second end ground connection of the 5th capacitance C5.
Optionally, detection circuit for electromagnetic valve further includes key circuit 105, the first signal output end of key circuit 105 with
First push button signalling test side of the second chip circuit 10232 connects, the second signal output end and the second core of key circuit 105
Second push button signalling test side of piece circuit 10232 connects.
Wherein, key circuit 105 includes the first button 1 and the second button 2, the first button 1 and the second chip circuit 10232
The connection of the first push button signalling test side, the second push button signalling test side company of the second button 2 and the second chip circuit 10232
It connects.At this point, believing by the first button for the second chip U2 that can change when key pressing in the second chip circuit 10232 being attached thereto
The level of number detection foot K1 and the second push button signalling detection foot K2.
Its specific work process is as follows, and when the first button 1 is in off state, the second chip U2 enters predeterminated frequency value
Program subsequently determines whether that the state of the second button 2, (1) second button 2 are in off state, the frequency of the solenoid valve 103 measured at this time
Value is the frequency values of the closed state of solenoid valve 103, and is preset in the second chip U2, and solenoid valve 103 is then turned on, etc.
When the state of the second button 2 is converted to open state, the frequency values of the solenoid valve 103 detected at this time are opening for solenoid valve 103
The frequency values of state are opened, and are preset in the second chip U2.(2) if the second button 2 is open state, second is waited for press
Key 2 executes step described in (1) again after being in off state.
It is worth noting that, key circuit 105 is inoperative in the normally on off state of detection solenoid valve 103,
Only need to use in the frequency values of preset on off state.
Optionally, detection circuit for electromagnetic valve further includes indicator light circuit, power input and the power supply electricity of indicator light circuit
The second source output end connection on road 101, the first control signal input terminal of indicator light circuit and the second chip circuit 10232
First control signal output end connects, and the of the second control signal input terminal of indicator light circuit and the second chip circuit 10232
Two control signal outputs connect；The power input V4 and the second source of power circuit 101 of second chip circuit 10232 are defeated
Outlet connects.
Wherein, the second chip circuit 10232 judges the working condition of solenoid valve 103, and sends corresponding instruction to indicator light
Circuit so that indicator light circuit can show the working condition of solenoid valve 103.
Optionally, indicator light circuit 104 includes the tenth resistance R10, eleventh resistor R11, twelfth resistor R12, the tenth
Three resistance R13, the first metal-oxide-semiconductor Q3, the second metal-oxide-semiconductor Q4, the first light emitting diode D1 and the second light emitting diode D2, the tenth resistance
The grid of the first end of R10 and the first metal-oxide-semiconductor Q3 are connect with the first control signal output end of the second chip circuit 10232,
The second end of tenth resistance R10 and the first power input that the connecting node of the source electrode of the first metal-oxide-semiconductor Q3 is indicator light circuit 104
V5, the first power input V5 of indicator light circuit 104 is held to be connect with the second source output end of power circuit 101；11st
The first end of resistance R11 is connect with the drain electrode of the first metal-oxide-semiconductor Q3, the second end of eleventh resistor R11 and the first light emitting diode
The anode of D1 connects, the minus earth of the first light emitting diode D1；The first end of twelfth resistor R12 and the second metal-oxide-semiconductor Q4's
Grid is connect with the second control signal output end of the second chip circuit 10232, the second end of twelfth resistor R12 and second
The connecting node of the source electrode of metal-oxide-semiconductor Q4 is the second source input terminal V6 of indicator light circuit 104, the second of indicator light circuit 104
Power input V6 is connect with the second source output end of power circuit 101；The first end of thirteenth resistor R13 and the 2nd MOS
The drain electrode of pipe Q4 connects, and the second end of thirteenth resistor R13 is connect with the anode of the second light emitting diode D2, the second light-emitting diodes
The minus earth of pipe D2.
In above-described embodiment, when the second chip circuit 10232 judges solenoid valve 103 for open state, control letter is sent out
Number so that the first metal-oxide-semiconductor Q3 conducting, at this point, due to the power access circuit of power circuit 101 so that the first light emitting diode D1
It is bright, it is possible thereby to show that solenoid valve 103 is open state.When the second chip circuit 10232 judges that solenoid valve 103 is in off state
When, it sends out control signal and makes the second metal-oxide-semiconductor Q4 conductings, at this point, due to the power access circuit of power circuit 101 so that the
Two light emitting diode D2 are bright, it is possible thereby to show that solenoid valve 103 is in off state so that the on off state of solenoid valve 103 can be with
It is immediately arrived at by the light on and off of the first light emitting diode D1 and the second light emitting diode D2.
To solve the above-mentioned problems, the present invention also proposes a kind of detection apparatus for electromagnetic valve, including solenoid valve as above detection
Circuit.
It is understood that due to having used above-mentioned detection circuit for electromagnetic valve in detection apparatus for electromagnetic valve of the present invention, because
This, the embodiment of detection apparatus for electromagnetic valve of the present invention includes whole technical sides of above-mentioned detection circuit for electromagnetic valve whole embodiments
Case, the technique effect reached is also identical, and details are not described herein.
Hereinafter, being illustrated in conjunction with Fig. 1,2,3 pairs of circuit theories of the invention：
The power supply that power circuit 101 exports flows into the base stage and 3rd resistor R3 of the first triode Q1 through first resistor R1,
The power supply that power circuit 101 exports also flows into the collector of the first triode Q1 through second resistance R2, since the partial pressure of resistance is made
With, form voltage difference between the base stage of the first triode Q1, collector and emitter, to conducting the first triode Q1.This
When, oscillating circuit 1021 is under magnifying state, and the signal that oscillating circuit 1021 is exported is amplified simultaneously by the first triode Q1
It flows through the second capacitance C2 to return in the first inductance L1 and solenoid valve 103, it is possible thereby to stablize the first inductance L1 and solenoid valve 103
The amplitude and frequency of middle signal.First inductance L1 and the 4th capacitance C4 needs and 103 collective effect of solenoid valve, composition LC oscillation electricity
Road, to achieve the effect that filter off the direct current signal in input signal, and since solenoid valve 103 is produced in switching process
Inductance it is in different size, so the output frequency of LC oscillating circuits also has corresponding difference, LC is measured it is possible thereby to pass through
The output frequency of oscillating circuit obtains the on off state of solenoid valve 103.
The power supply for flowing into the power end V2 of amplifying circuit 1022 flows into the base stage of the second triode Q2 through the 5th resistance R5, and
Collector through the 6th the second triodes of resistance R6 Q2, and the emitter ground connection of the second triode Q2, thus in the second triode
The base stage of Q2, collector and emitter form voltage difference, so that the second triode Q2 conductings, the second triode Q2 will be flowed into
The sine wave signal of amplifying circuit 1022 carries out secondary amplification, with the amplitude of the sine wave signal of enhancing output, and will be after amplification
Signal export to the first chip circuit 10231.The sine wave signal of input is rectified into square wave letter by the first chip circuit 10231
Number the second chip circuit of output valve 10232.Second chip circuit 10232 judges electricity according to preset frequency values and judgment rule
The state of magnet valve 103.Corresponding actions after judgement are as follows：
When the second chip circuit 10232 judges solenoid valve 103 for open state, sends out control signal and make the first MOS
Pipe Q3 conductings, at this point, due to the power access circuit of power circuit 101 so that the first light emitting diode D1 is bright, it is possible thereby to aobvious
Show that solenoid valve 103 is open state.
When the second chip circuit 10232 judges that solenoid valve 103 is in off state, sends out control signal and make the 2nd MOS
Pipe Q4 conductings, at this point, due to the power access circuit of power circuit 101 so that the second light emitting diode D2 is bright, it is possible thereby to aobvious
Show that solenoid valve 103 is in off state.
Above-mentioned detection circuit for electromagnetic valve can be in the case where not changing the script overall structure of solenoid valve 103, Ke Yiyu
All installed solenoid valves 103 are completely compatible on the market, do not need to change.Also, the operating voltage of this programme is relatively low,
The working condition of solenoid valve 103 can be accurately measured by the detection of 1022 output frequency of oscillating circuit, therefore safe and reliable.Separately
Outside, the detection process of 103 working condition of the setting of high-resolution timer and solenoid valve ensure that entire detection process and pre-
Set the accuracy of frequency values process.
The foregoing is merely the preferred embodiment of the present invention, are not intended to limit the scope of the invention, every at this
Under the inventive concept of invention, using equivalent structure transformation made by description of the invention and accompanying drawing content, or directly/use indirectly
In the scope of patent protection that other related technical areas are included in the present invention.
Claims (10)
1. a kind of detection circuit for electromagnetic valve, which is characterized in that the detection circuit for electromagnetic valve includes power circuit and detection circuit；
First power output end of the power circuit is connect with the first power input of the detection circuit, the power supply electricity
The second source output end on road is connect with the second source input terminal of the detection circuit；The first test side of the detection circuit with
The first end of the solenoid valve connects, and the second test side of the detection circuit is connect with the second end of the solenoid valve；
The power circuit, for providing the first power supply and the second power supply for the detection circuit；
The detection circuit, the frequency values for detecting solenoid valve, and according to the frequency values of the solenoid valve and preset judgement
Rule judges the working condition of solenoid valve.
2. detection circuit for electromagnetic valve as described in claim 1, which is characterized in that the detection circuit is according to following judgment rule
Determine the working condition of solenoid valve：
FDG=| FD-FG|；
FDK=| FD-FK|；
Wherein, FDFor the frequency values of the solenoid valve of detection, FGFor the frequency values of preset solenoid valve open state, FKIt is pre-
If electromagnetism valve closing state frequency values；
Work as FDGMore than FDKWhen, solenoid valve is in off state；
Work as FDGLess than FDKWhen, solenoid valve is open state.
3. detection circuit for electromagnetic valve as described in claim 1, which is characterized in that the detection circuit includes oscillating circuit, puts
Big circuit and chip circuit, the power input of the oscillating circuit are connect with the first power output end of the power circuit,
The output end of the oscillating circuit is electric with the first end of the solenoid valve, the input terminal of the amplifying circuit and the oscillation respectively
The input/output terminal on road connects, and the input terminal of the oscillating circuit is connect with the second end of the solenoid valve；The amplifying circuit
Output end connect with the detection signal input part of the chip circuit, the power end of the amplifying circuit and the power circuit
Second source output end connection.
4. detection circuit for electromagnetic valve as claimed in claim 3, which is characterized in that the oscillating circuit includes first resistor,
Two resistance, 3rd resistor, the 4th resistance, the first triode, the first capacitance, the second capacitance, third capacitance, the 4th capacitance and first
Inductance, the first end of the first resistor are connect with the first end of the second resistance, the first resistor and second electricity
The connecting node of resistance is connect with the first power output end of the power circuit, the second end of the first resistor respectively with it is described
The base stage of the first end of first capacitance, the first end of the 3rd resistor and first triode connects；First capacitance
Second end, the second end of first inductance connect with the first end of the 4th capacitance；The first end of second capacitance
It is connect respectively with the collector of the second end of the second resistance and first triode, the second end of second capacitance is
The output end of the oscillating circuit；The emitter of first triode respectively with the first end of the 4th resistance and described
The first end of three capacitances connects；The of the second end of the 3rd resistor, the second end of the 4th resistance, the third capacitance
Two ends, first inductance first end connect with the first end of the solenoid valve, first inductance and the solenoid valve
Connecting node is grounded；The second end of 4th capacitance is the input/output terminal of the oscillating circuit.
5. detection circuit for electromagnetic valve as claimed in claim 3, which is characterized in that the amplifying circuit includes the 5th resistance, the
The first end of six resistance, the 7th resistance and the second triode, the 5th resistance is connect with the first end of the 6th resistance, institute
The connecting node for stating the 5th resistance and the 6th resistance is the power end of the amplifying circuit, the second end of the 5th resistance
It is connect respectively with the base stage of the first end of the 7th resistance and second triode, the 5th resistance, the 7th electricity
The connecting node of resistance and second triode is the input amplifier；The collector of second triode with it is described
The second end of 6th resistance connects, and the connecting node of second triode and the 6th resistance is the defeated of the amplifying circuit
The second end of outlet, the emitter of second triode and the 7th resistance is grounded.
6. detection circuit for electromagnetic valve as claimed in claim 3, which is characterized in that the chip circuit includes the first chip circuit
With the second chip circuit, the power end of the power end of first chip circuit and second chip circuit with the power supply
The second source output end of circuit connects, the output of the detection signal input part and the amplifying circuit of first chip circuit
End connection, the detection signal output end of first chip circuit are connect with the external interrupt end of second chip circuit.
7. detection circuit for electromagnetic valve as claimed in claim 6, which is characterized in that the detection circuit for electromagnetic valve further includes button
Circuit, the first signal output end of the key circuit are connect with the first push button signalling test side of second chip circuit,
The second signal output end of the key circuit is connect with the second push button signalling test side of second chip circuit.
8. detection circuit for electromagnetic valve as claimed in claim 6, which is characterized in that the detection circuit for electromagnetic valve further includes instruction
Circuit for lamp, the power input of the indicator light circuit are connect with the second source output end of the power circuit, the instruction
The first control signal input terminal of circuit for lamp is connect with the first control signal output end of second chip circuit, the instruction
The second control signal input terminal of circuit for lamp is connect with the second control signal output end of second chip circuit；Described second
The power input of chip circuit is connect with the second source output end of the power circuit.
9. a kind of detection circuit for electromagnetic valve as claimed in claim 8, which is characterized in that the indicator light circuit includes the tenth electricity
Resistance, eleventh resistor, twelfth resistor, thirteenth resistor, the first metal-oxide-semiconductor, the second metal-oxide-semiconductor, the first light emitting diode and second
Light emitting diode, the first end of the tenth resistance and the grid of first metal-oxide-semiconductor with second chip circuit
One control signal output connects, and the second end of the tenth resistance and the source electrode of first metal-oxide-semiconductor are electric with the power supply
The second source output end on road connects；The first end of the eleventh resistor is connect with the drain electrode of first metal-oxide-semiconductor, and described
The second end of 11 resistance is connect with the anode of first light emitting diode, the minus earth of first light emitting diode；
Second control signal of the grid of the first end of the twelfth resistor and second metal-oxide-semiconductor with second chip circuit
Output end connects, the source electrode of the second end of the twelfth resistor and second metal-oxide-semiconductor with the power circuit second
Power output end connects；The first end of the thirteenth resistor is connect with the drain electrode of second metal-oxide-semiconductor, the thirteenth resistor
Second end connect with the anode of second light emitting diode, the minus earth of second light emitting diode.
10. a kind of detection apparatus for electromagnetic valve, which is characterized in that examined including solenoid valve as claimed in any one of claims 1-9 wherein
Slowdown monitoring circuit.
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|---|---|---|---|
| CN201810685553.3A CN108646176A (en) | 2018-06-27 | 2018-06-27 | Detection circuit for electromagnetic valve and its device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810685553.3A CN108646176A (en) | 2018-06-27 | 2018-06-27 | Detection circuit for electromagnetic valve and its device |
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| CN109406742A (en) * | 2018-11-12 | 2019-03-01 | 上海仪电科学仪器股份有限公司 | Magnetic force power switch and water quality detection equipment under pressure-resistant water proof equipment environment |
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