CN202815121U - Solenoid valve position detection circuit - Google Patents
Solenoid valve position detection circuit Download PDFInfo
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- CN202815121U CN202815121U CN 201220520162 CN201220520162U CN202815121U CN 202815121 U CN202815121 U CN 202815121U CN 201220520162 CN201220520162 CN 201220520162 CN 201220520162 U CN201220520162 U CN 201220520162U CN 202815121 U CN202815121 U CN 202815121U
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Abstract
The application discloses a solenoid valve position detection circuit. The circuit comprises Hall elements used for detecting the magnetic field change and outputting voltage signals in direct proportion to the magnetic field intensity; a signal conditioning protection circuit connected with output ends of the Hall elements and used for adjusting the voltage signals; and a signal output interface connected with an output end of the signal conditioning protection circuit and used for outputting the voltage signals adjusted by the signal conditioning protection circuit. The circuit employs the Hall elements to detect the magnitude of an ESP current magnetic field and outputs the voltage signals adjusted by the signal conditioning protection circuit to a real-time system for detection, and complex hydraulic loops in an ESP mixing analog simulation experiment table do not need to build, thereby making the ESP mixing analog simulation experiment table smaller in size and making the modeling simple. Simultaneously, the application reduces unnecessary ESP field test content or reduces certain unnecessary test steps in the test content, thereby effectively solving the problems that a vehicle-mounted ESP test system is high in danger coefficient and poor in ESP performance test repeatability.
Description
Technical field
The application relates to the car performance test system field, in particular, relates to a kind of electromagnetic valve body position detecting circuit.
Background technology
Along with the fast development of automobile industry, people improve constantly the requirement of vehicle safety performance, and the effect of active safety feature is also more and more outstanding.ESP(Electronic Stability Program, electric stabilizing system) can driver assistance be controlled by the dynamics of vehicle, control the yaw velocity of automobile and with the side drift angle restriction within the specific limits by the output torque of the control damping force of wheel and engine, prevent from breakking away.Under the operating mode of the limit, ESP can also assist the driver to keep the stability of automobile, prevents that instability status from occurring.Therefore, ESP performance test, data performance demarcation and optimization etc. are just become particularly important.
At present, traditional ESP test mode comprises and builds hybrid simulation simulated experiment stand and vehicle-mounted ESP test macro.Wherein, build ESP hybrid simulation simulated experiment stand, the actual hardware (comprising brake system assembly solenoid valve) of ESP need to be embedded in the experimental stand, utilize pressure transducer directly to measure ESP hydraulic circuit pressure, reflect ESP performance quality by measuring hydraulic circuit pressure.Yet build ESP hybrid simulation simulated experiment stand, need a large amount of parts of design, bulky, modeling is complicated.
Vehicle-mounted ESP test macro needs vehicle road test, namely gather the vehicle parameter in the actual driving process, image data is carried out analyzing and processing, thereby the performance parameters such as the slip rate of the on-position of acquisition ESP, braking time, braking procedure, wheel angular deceleration, control performance, hysteretic properties, control accuracy and the steering logic etc. of further evaluation analysis ESP.Yet in the vehicle road test process, danger coefficient is large, and the data of need measuring are many, and the factor that affect test effect is also many and be difficult to hold, and causes ESP performance test repeatability bad.
The utility model content
For the problems referred to above, the application provides a kind of electromagnetic valve body position detecting circuit, need to design a large amount of parts to build ESP hybrid simulation simulated experiment stand in the solution prior art, bulky, the problem of modeling complexity, and vehicle-mounted ESP test macro danger coefficient is large, needs the data of measurement many, the factor that affects test effect is also many and be difficult to hold, and causes the bad problem of ESP performance test repeatability.Technical scheme is as follows:
The application provides a kind of electromagnetic valve body position detecting circuit, comprising:
For detection of changes of magnetic field, output is proportional to the Hall element of the voltage signal of magnetic field intensity;
Be connected with the output terminal of described Hall element, be used for the signal condition holding circuit of regulating described voltage signal;
Be connected with the output terminal of described signal condition holding circuit, be used for the signal output interface of the voltage signal of output after described signal condition holding circuit is regulated.
Preferably, described signal condition holding circuit comprises: input stage circuit, intergrade circuit and output-stage circuit, wherein,
Described input stage circuit is connected with the output terminal of described Hall element, and wherein said input stage circuit comprises signal input part, and the output terminal of described Hall element is connected with described signal input part;
Described intergrade circuit is connected with described input stage circuit, and wherein said intergrade circuit comprises amplifying circuit, and the output terminal of described input stage circuit is connected with the input end of described amplifying circuit;
Described output-stage circuit is connected with described intergrade circuit, and wherein said output-stage circuit comprises holding circuit, and the output terminal of described amplifying circuit is connected with the input end of described holding circuit.
Preferably, described amplifying circuit is differential amplifier circuit, and wherein said differential amplifier circuit comprises differential amplifier.
Preferably, described input stage circuit also comprises: the signal reference edge that is connected with the input end of described differential amplifier circuit.
Preferably, described input stage circuit also comprises: polarity switching, and wherein, described polarity switching comprises the first output terminal, the second output terminal, first input end, the second input end, the first toggle switch and the second toggle switch, wherein,
The first output terminal of described polarity switching is connected with the normal phase input end of described differential amplifier circuit;
The second output terminal of described polarity switching is connected with the negative-phase input of described differential amplifier circuit;
The first input end of described polarity switching is connected with described signal input part;
The second input end of described polarity switching is connected with described signal reference edge;
One end of the first toggle switch of described polarity switching is connected with the first output terminal of described polarity switching, and the other end is connected with first input end or second input end of described polarity switching;
One end of the second toggle switch of described polarity switching is connected with the second output terminal of described polarity switching, and the other end is connected with first input end or second input end of described polarity switching.
Preferably, described holding circuit comprises: class AB power amplification circuit, frequency compensated circuit, current foldback circuit and driving circuit, wherein,
Described class AB power amplification circuit comprises amplifier, the first bipolar junction transistor BJT, the second bipolar junction transistor BJT;
The normal phase input end of wherein said amplifier is connected with the output terminal of described differential amplifier circuit;
The negative-phase input of described amplifier is connected with described signal output interface;
Wherein said the first bipolar junction transistor BJT is NPN type triode, and described the second bipolar junction transistor BJT is the positive-negative-positive triode;
Described frequency compensated circuit comprises capacitor C, and described capacitor C is connected between the negative-phase input of the output terminal of described amplifier and described amplifier;
Described current foldback circuit comprises the first constant-current source circuit, the second constant-current source circuit, first group of diode, second group of diode, the 3rd group of diode, the first commutation circuit and the second commutation circuit;
Wherein said first group of diode, second group of diode and the 3rd group of diode are respectively forward two diodes of series connection;
Described the first constant-current source circuit is connected with the normal phase input end of described first group of diode;
The tie point of two diodes is connected with the normal phase input end of described second group of diode in described first group of diode;
The tie point of two diodes is connected with the output terminal of described amplifier in described second group of diode;
The output terminal of described second group of diode is connected with the input end of described the 3rd group of diode;
The tie point of two diodes is connected with described the second constant-current source circuit in described the 3rd group of diode;
Described the first commutation circuit connects the tie point of the base stage of the output terminal of described the first constant-current source circuit and described the first bipolar junction transistor BJT;
Described the second commutation circuit connects the tie point of the base stage of the input end of described the second constant-current source circuit and described the second bipolar junction transistor BJT;
The emitter of described the first bipolar junction transistor BJT is connected by two diodes of forward connecting with the emitter of described the second bipolar junction transistor BJT;
The emitter of described the first bipolar junction transistor BJT connects the anode of described two diodes of forward connecting;
The emitter of described the second bipolar junction transistor BJT connects the negative electrode of described two diodes of forward connecting;
And the tie point of two diodes of described two diodes of forward connecting is connected with described signal output interface;
Described driving circuit comprises the first driving circuit and the second driving circuit;
The input end of wherein said the first driving circuit connects outside positive 15V supply voltage, and output terminal is connected with described the first bipolar junction transistor BJT collector;
The input end of described the second driving circuit is connected with the collector of described the second bipolar junction transistor BJT, and output terminal connects outside negative 15V supply voltage.
Preferably, described Hall element is installed on the Hall element plate.
Preferably, described Hall element plate is fixed on the fixed support.
Preferably, described fixed support comprises:
Fixed head;
Be arranged on several vacuum aluminum posts on the described fixed head;
Be arranged on described vacuum aluminum post several Hall element fixed orifices on every side;
Motor power supply terminal via hole.
Preferably, described Hall element is embedded is inserted in described vacuum aluminum post.
Use technique scheme; the application utilizes Hall element direct-detection changes of magnetic field output one to be proportional to the voltage signal of magnetic field intensity; and then directly export the voltage signal after the signal condition holding circuit is regulated to real-time system and detect; be back-calculated to obtain the size of current that produces in the action of ESP actual motion by the detection in the real-time system; and make comparisons with the ESP theoretical value of desired design; and then it is demarcated, optimizes and test, also can be used to carry out fault simulation diagnosis etc.The application directly utilizes Hall element to detect ESP current field size; the voltage signal that detection is obtained directly exports the real-time system detection to after the signal condition holding circuit is regulated; do not need to build hydraulic circuit complicated in the ESP hybrid simulation simulated experiment stand; namely do not need to design a large amount of parts; diminish so that ESP hybrid simulation simulated experiment platform support body is long-pending, modeling is simple.And the application has reduced unnecessary ESP real vehicle content measurement or has reduced the unnecessary testing procedure of some in the content measurement, it is large to efficiently solve vehicle-mounted ESP test macro danger coefficient, need the data of measurement many, the factor that affects test effect is also many and be difficult to hold, and causes the bad problem of ESP performance test repeatability.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the present application, the below will do to introduce simply to the accompanying drawing of required use among the embodiment, apparently, accompanying drawing in the following describes only is some embodiment of the application, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
A kind of structural representation of a kind of electromagnetic valve body position detecting circuit that Fig. 1 provides for the application;
The signal output interface structural representation of a kind of electromagnetic valve body position detecting circuit that Fig. 2 the application provides;
The structural representation of the signal condition holding circuit of a kind of electromagnetic valve body position detecting circuit that Fig. 3 provides for the application;
The interface structure synoptic diagram of the signal condition holding circuit of a kind of electromagnetic valve body position detecting circuit that Fig. 4 provides for the application;
The another kind of structural representation of the signal condition holding circuit of a kind of electromagnetic valve body position detecting circuit that Fig. 5 provides for the application;
The structural representation of the polarity switching of a kind of electromagnetic valve body position detecting circuit that Fig. 6 provides for the application;
The structural representation of the holding circuit of a kind of electromagnetic valve body position detecting circuit that Fig. 7 provides for the application;
The circuit diagram of the holding circuit of a kind of electromagnetic valve body position detecting circuit that Fig. 8 provides for the application;
The mounting structure synoptic diagram of a kind of electromagnetic valve body position detecting circuit that Fig. 9 provides for the application;
The vacuum aluminum rod structure synoptic diagram of a kind of electromagnetic valve body position detecting circuit that Figure 10 provides for the application.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present application, the technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment only is the application's part embodiment, rather than whole embodiment.Based on the embodiment among the application, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the application's protection.
An embodiment
See also Fig. 1, a kind of structural representation that it shows a kind of electromagnetic valve body position detecting circuit that the application provides comprises: Hall element 1, signal condition holding circuit 2 and signal output interface 3.
Wherein, Hall element 1 is for detection of changes of magnetic field, and output is proportional to the voltage signal of magnetic field intensity.
At present, vehicle is being carried out ESP(Electronic Stability Program, electric stabilizing system) during performance parameter test, input a kind of running conditions of vehicle of simulation to ESP, by checking the whether quality of the same ESP of judgement performance with the action of desired design of processing action that ESP makes.ESP receives the running conditions of vehicle of simulation, corresponding running conditions of vehicle output current immediately, the electric current solenoid of flowing through produces magnetic field, and the size in electromagnetism magnetic field can be controlled the change of electromagnetic valve body position, and then the pressure of change hydraulic circuit, finally control automobile and make corresponding processing action.
The application directly exports the voltage signal that Hall element 1 detection changes of magnetic field is exported to real-time system to detect, be back-calculated to obtain the size of current that produces in the action of ESP actual motion by the detection in the real-time system again, and make comparisons with the ESP theoretical value of desired design, judge ESP performance quality.
In the present embodiment, Hall element 1 is arranged in the middle of the solenoid, when solenoid produces electromagnetism magnetic field, detects the voltage signal that changes of magnetic field output one is proportional to magnitude of field intensity, and voltage signal is transferred to signal condition holding circuit 2.
Signal condition holding circuit 2 is connected with Hall element 1 output terminal, is used for receiving and regulating the voltage signal that Hall element 1 detection magnetic field obtains.
See also Fig. 2, it shows the signal output interface structural representation of a kind of electromagnetic valve body position detecting circuit that the application provides.Signal output interface 3 is arranged on the P3 plate, wherein-15V is the interface that connects outer power voltage-15V, + 15V is for connecting the interface of outer power voltage+15V, GND is for connecting the interface of ground wire, the interface of NC for not needing to connect, OUTXX is signal output interface 3, and XX represents the signal output interface sequence number.For example, the output terminal of signal condition holding circuit 2 is connected to the OUT01 interface, and then voltage signal exports the rear end real-time system to by the OUT01 interface.
In the present embodiment, there are the problems such as low, the easy distortion of frequency, weak output signal in the voltage signal that Hall element 1 detects the output of electromagnetism changes of magnetic field, and when voltage signal directly was transferred to rear end real-time system detection, real-time system can not directly be utilized this voltage signal.Therefore, conditioning holding circuit 2 with voltage signal amplify, the adjustings such as filtering, frequency compensation, the voltage signal that makes Hall element 1 after the adjusting detect the output of electromagnetism changes of magnetic field satisfies the requirement of real-time system.At last, realize being connected of signal condition holding circuits 2 and real-time system by signal output interface 3, directly export the voltage signal after the adjusting to real-time system.
Especially, a plurality of Hall elements 1 can be arranged in the electromagnetism magnetic field simultaneously, and to detect simultaneously changes of magnetic field, output is proportional to the voltage signal of magnitude of field intensity.Corresponding signal condition holding circuit 2 contains a plurality of interfaces, Hall element 1 of a corresponding connection of interface.
Use technique scheme; the application utilizes Hall element direct-detection changes of magnetic field to export a voltage signal; and then directly export the voltage signal after the signal condition holding circuit is regulated to real-time system and detect; be back-calculated to obtain the size of current that produces in the action of ESP actual motion by the detection in the real-time system; and make comparisons with the ESP theoretical value of desired design; and then it is demarcated, optimizes and test, also can be used to carry out fault simulation diagnosis etc.The application directly utilizes Hall element to detect ESP current field size; the voltage signal that detection is obtained directly exports the real-time system detection to after the signal condition holding circuit is regulated; do not need to build hydraulic circuit complicated in the ESP hybrid simulation simulated experiment stand; namely do not need to design a large amount of parts; diminish so that ESP hybrid simulation simulated experiment platform support body is long-pending, modeling is simple.And, the application has reduced ESP real vehicle content measurement or has reduced the unnecessary testing procedure of some in the content measurement, it is large to efficiently solve vehicle-mounted ESP test macro danger coefficient, need the data of measurement many, the factor that affects test effect is also many and be difficult to hold, and causes the bad problem of ESP performance test repeatability.
Another embodiment
Particularly, see also Fig. 3, the structural representation that it shows the signal condition holding circuit of a kind of electromagnetic valve body position detecting circuit that the application provides comprises input stage circuit 21, intergrade circuit 22 and output-stage circuit 23.
Wherein, input stage circuit 21 comprises signal input part 211, and the output terminal of Hall element 1 is connected with signal input part 211.
In the present embodiment, signal condition holding circuit 2 contains a plurality of interfaces, sees also Fig. 4, and it shows the interface structure synoptic diagram of the signal condition holding circuit of a kind of electromagnetic valve body position detecting circuit that the application provides.In signal condition holding circuit 2 P1, P2 two row's terminal interface are set; wherein; VCC is for connecting the interface of outer power voltage; GND is for connecting the interface of ground wire; SenXX is the signal input interface on the signal condition holding circuit 2; XX represents the signal input interface sequence number, the interface of NC for not needing to connect.Wherein every adjacent three pin VCC, GND and SexXX consist of one group of signal input part 211.For example, Hall element 1 is connected with the Sex01 interface, and VCC, GND connect respectively outer power voltage and ground wire, and the voltage signal that Hall element 1 detects changes of magnetic field output is transferred to signal condition holding circuit 2 by the Sex01 interface.
Especially, have in the present embodiment a plurality of Hall elements 1, the output terminal that is about to each Hall element 1 is connected with each group signal input part 211 on the signal condition holding circuit 2 respectively.
In the present embodiment; after signal condition holding circuit 2 receives the voltage signal of a plurality of Hall elements 1 detection changes of magnetic field outputs through each group signal input part 211; a plurality of voltage signals are processed; and the voltage signal after will processing is transferred to the amplifying circuit 221 of intergrade circuit 22 through the output terminal of input stage circuit 21; utilize amplifying circuit 221 that voltage signal is amplified, so that the voltage signal after amplifying and the analog acquisition scope of rear end real-time system are complementary.
Output-stage circuit 23 comprises holding circuit 231, and the output terminal of amplifying circuit 221 is connected with the input end of holding circuit 231.
The situations such as distortion, frequency reduction can occur in voltage signal in transmission course, by holding circuit voltage signal is repaired, so that the voltage signal that the rear end real-time system receives is more accurate, are convenient to detect.Simultaneously holding circuit 231 plays short-circuit protection function, when guaranteeing that short-circuit conditions appears in electromagnetic valve body position detecting circuit that the application provides, can not cause damage to the rear end real-time system.
Another embodiment
Before the work of ESP Performance Detection; be that Hall element 1 detected the voltage signal of changes of magnetic field output before signal input part 211 inputs on the signal condition holding circuit 2; under desirable environmental magnetic field; solenoid did not have electric current when ESP did not work; namely do not produce magnetic field; at this moment, Hall element 1 detects changes of magnetic field, and the voltage signal that output is proportional to magnitude of field intensity is 0V.But in practical work process; can there be the interference in other magnetic fields; causing the voltage signal of Hall element 1 output no longer is 0V; so; see also Fig. 5; it shows the another kind of structural representation of the signal condition holding circuit of a kind of electromagnetic valve body position detecting circuit that the application provides, and on the basis of Fig. 3, input stage circuit 21 also comprises: signal reference edge 212 and polarity switching 213.The amplifying circuit 221 of intergrade circuit 22 is differential amplifier circuit, and differential amplifier circuit comprises differential amplifier 221A.
Wherein, see also Fig. 6, it shows the structural representation of the polarity switching of a kind of electromagnetic valve body position detecting circuit that the application provides.Wherein, polarity switching 213 comprises first input end 213A, the second input end 213B, the first output terminal 213C, the second output terminal 213D, the first toggle switch 213E and the second toggle switch 213F.
Particularly, the first output terminal 213C of polarity switching 213 is connected with the normal phase input end of differential amplifier 221A in the differential amplifier circuit;
The second output terminal 213D of polarity switching 213 is connected with the negative-phase input of differential amplifier circuit differential amplifier 221A;
The first input end 213A of polarity switching 213 is connected with signal input part 211;
The second input end 213B of polarity switching 213 is connected with signal reference edge 212;
The end of the first toggle switch 213E of polarity switching 213 is connected with the first output terminal 213C of polarity switching 213, and the other end is connected with first input end 213A or the second input end 213B of polarity switching 213;
The end of the second toggle switch 213F of polarity switching 213 is connected with the second output terminal 213D of polarity switching 213, and the other end is connected with first input end 213A or the second input end 213B of polarity switching 213.
In the present embodiment, the first toggle switch 213E selects the forward input, the second toggle switch 213F selects the forward input, be that the voltage signal of signal input part 211 inputs is by the first input end 213A input of polarity switching 213, export the normal phase input end of differential amplifier 221A in the differential amplifier circuit to by the first output terminal 213C of polarity switching 213, the voltage signal of signal reference edge 212 inputs exports the negative-phase input of differential amplifier INA128 in the differential amplifier circuit to by the second input end 213B input of polarity switching 213 by the second output terminal 213D of polarity switching 213;
The first toggle switch 213E selects oppositely input, the second toggle switch 213F selects oppositely input, be that the voltage signal of signal input part 211 inputs is by the first input end 213A input of polarity switching 213, export the negative-phase input of differential amplifier 221A in the differential amplifier circuit to by the second output terminal 213D of polarity switching 213, the voltage signal of signal reference edge 212 inputs exports the normal phase input end of differential amplifier 221A in the differential amplifier circuit to by the second input end 213B input of polarity switching 213 by the first output terminal 213C of polarity switching 213;
The first toggle switch 213E selects the forward input, the second toggle switch 213F selects oppositely input, be the voltage signal of signal input part 211 input by the first input end 213A input of polarity switching 213, normal phase input end and negative-phase input that the first output terminal 213C and the second output terminal 213D by polarity switching 213 exports differential amplifier 221A in the differential amplifier circuit simultaneously to;
The first toggle switch 213E selects oppositely input, the second toggle switch 213F selects the forward input, be the voltage signal of signal reference edge 212 input by the second input end 213B input of polarity switching 213, normal phase input end and negative-phase input that the first output terminal 213C and the second output terminal 213D by polarity switching 213 exports differential amplifier 221A in the differential amplifier circuit simultaneously to.
In the present embodiment, owing to there is the interference in other magnetic fields, ESP is before work, and input end 211 has begun to input the voltage signal that Hall element 1 detects changes of magnetic field output, if be 0.5V.Therefore after ESP started working, there was the deviation of 0.5V in the voltage signal of Hall element 1 detection changes of magnetic field output, through follow-up amplifieroperation, causes error very large, finally causes the inaccuracy of testing.For the accuracy that guarantees to test; signalization reference edge 212 in the signal condition holding circuit 2; detecting because behind the bias voltage that the magnetic interference existence causes; signal reference edge 212 is inputted equirotal voltage signal at the negative-phase input of differential amplifier 221A; utilize differential amplifier 221A principle of work regulation voltage signal; eliminate the bias voltage that environmental magnetic field produces, to reduce to detect error.
In the present embodiment, according to the electric circuit inspection needs, need positive voltage of regulation differential amplifier 221A output to detect.The voltage signal of signal reference edge 212 inputs is used for eliminating the bias voltage that environmental magnetic field produces, to reduce to detect error, so need signalization reference edge 212 and signal input part 211 to be connected to negative-phase input and the normal phase input end of differential amplifier 221A.
Polarity switching 213 is used for for different electromagnetism magnetic field situations, and switching signal input end 211 and signal reference edge 212 are input to the input polarity of differential amplifier 221A at any time.When magnetic field intensity becomes large, differential amplifier 221A exports a negative voltage, illustrate that this moment, signal input part 211 was connected to the negative-phase input of differential amplifier 221A, signal reference edge 212 is connected to the normal phase input end of differential amplifier 221A, the the first toggle switch 213E and the second toggle switch 213F that stir this moment in the polarity switching 213 carry out forward and reverse input switching, signal input part 211 is connected to the normal phase input end of differential amplifier 221A, signal reference edge 212 is connected to the negative-phase input of differential amplifier 221A, and then so that positive voltage of differential amplifier 221A output.
Need to prove, in the present embodiment, the first toggle switch 213E and two toggle switchs of the second toggle switch 213F, the respectively output terminal of the correspondence of the first input end 213A of control selection polarity switching 213 and the second input end 213B.Certainly, design philosophy based on the application, signal reference edge 212 is used for eliminating the bias voltage that environmental magnetic field produces, therefore, it is same toggle switch 213G that the first toggle switch 213E and the second toggle switch 213F can be set, when toggle switch 213G selects the forward input, the i.e. forward input all selected of the first toggle switch 213E and the second toggle switch 213F, when toggle switch 213G selects oppositely input, the i.e. reverse input all selected of the first toggle switch 213E and the second toggle switch 213F has realized the simultaneously function of synchro control the first toggle switch 213E and the second toggle switch 213F conversion.
See also Fig. 7, the structural representation that it shows the holding circuit of a kind of electromagnetic valve body position detecting circuit that the application provides comprises: class AB power amplification circuit 231A, frequency compensated circuit 231B, current foldback circuit 231C and driving circuit 231D.
See also simultaneously Fig. 8, it shows the circuit theory diagrams of the holding circuit of a kind of electromagnetic valve body position detecting circuit that the application provides.Wherein, class AB power amplification circuit 231A comprises amplifier 231A1, a BJT(Bipolar Junction Transistor, bipolar junction transistor) 231A2 and the 2nd BJT231A3.Wherein, a BJT231A2 can be the positive-negative-positive triode for NPN type triode, the 2nd BJT231A3.
Particularly, the normal phase input end of amplifier 231A1 is connected with the output terminal of differential amplifier 221A in the differential amplifier circuit, the negative-phase input of amplifier 231A1 is connected with signal output interface 3, is used for further with the voltage signal power amplification, to satisfy the operation that drives the rear end load.
Wherein a BJT231A2 is NPN type triode, and the 2nd BJT231A3 is the positive-negative-positive triode.
Frequency compensated circuit 231B comprises capacitor C, and capacitor C is connected between the negative-phase input of the output terminal of amplifier 231A1 and amplifier 231A1, plays the effect of power back-off.
Wherein, first group of diode 231C3, second group of diode 231C4 and the 3rd group of diode 231C5 are respectively forward two diodes of series connection.Here so-called forward series connection represents that namely two same directions of diode are connected in series.
Particularly, the first constant-current source circuit 231C1 is connected with the normal phase input end of first group of diode 231C3;
The tie point of two diodes is connected with the normal phase input end of second group of diode 231C4 among first group of diode 231C3;
The tie point of two diodes is connected with the output terminal of amplifier 231A1 among second group of diode 231C4;
The output terminal of second group of diode 231C4 is connected with the input end of the 3rd group of diode 231C5;
The tie point of two diodes is connected with the second constant-current source circuit 231C2 among the 3rd group of diode 231C5;
The first commutation circuit 231C6 connects the tie point of the base stage of the output terminal of the first constant-current source circuit 231C1 and a BJT231A2;
The second commutation circuit 231C7 connects the tie point of the base stage of the input end of the second constant-current source circuit 231C2 and the 2nd BJT231A3;
The emitter of the one BJT231A2 is connected by two diodes of forward connecting with the emitter of the 2nd BJT231A3;
The emitter of the one BJT231A2 connects two forward anodes of the diode of series connection, and the emitter of the 2nd BJT231A3 connects two forward negative electrodes of the diode of series connection, and the tie point of two diodes of forward connecting is connected with signal output interface 3.
Driving circuit 231D comprises the first driving circuit 231D1 and the second driving circuit 231D2.
Wherein, the input end of the first driving circuit 231D1 connects outside positive 15V supply voltage, and output terminal is connected with the collector of a BJT231A2;
The input end of the second driving circuit 231D2 is connected with the collector of the 2nd BJT231A3, and output terminal connects outside negative 15V supply voltage.
In the present embodiment, the specific works principle of class AB power amplification circuit 231A, frequency compensated circuit 231B, current foldback circuit 231C and driving circuit 231D is identical with available circuit, and present embodiment is no longer set forth.
In the present embodiment; the voltage signal of Hall element 1 detection changes of magnetic field output passes through first the adjusting of input stage circuit 21; eliminate the detectable voltage signals error that other magnetic interference cause; in the scope that the analog acquisition scope that through differential amplifier INA128 voltage signal is amplified to the rear end real-time system is complementary; again by the holding circuit 231 in the output-stage circuit 23; voltage signal is further repaired, by signal output interface 3 voltage signal is transferred to the rear end real-time system at last and detect.
Another embodiment
In the present embodiment, Hall element 1 can be installed on the Hall element plate 11.Be arranged in simultaneously in the electromagnetism magnetic field if a plurality of Hall elements 1 are set, to detect simultaneously changes of magnetic field, when output is proportional to the voltage signal of magnetic field size, Hall element 1 order can be installed on the Hall element plate 11.Here, order is installed and is not construed as limiting, and designed, designed can be liked according to individual subscriber in the installation site of Hall element 1.Hall element plate 11 is fixed on the fixed support 5, wherein sees also Fig. 9, and the mounting structure synoptic diagram that it shows a kind of electromagnetic valve body position detecting circuit that the application provides comprises fixed support 5, is used for Hall element plate 11 is installed in fixed support 5.Wherein, fixed support 5 comprises: fixed head 51, vacuum aluminum post 52, Hall element fixed orifice 53 and motor power supply terminal via hole 54.
Particularly, several vacuum aluminum posts 52 are arranged on the fixed head 51, and around each vacuum aluminum post 52 several Hall element fixed orifices 53 are set.Wherein, vacuum aluminum post 52 corresponding Hall elements 1, Hall element 1 embedded being inserted in the corresponding vacuum aluminum post 52 on the Hall element plate 11.Hall element fixed orifice 53 is used for realizing the fixing of Hall element 1 and fixed head 51.Simultaneously, be provided with motor power supply terminal via hole 54 on the fixed head 51, the power supply terminal of pump motor passes from motor power supply terminal via hole 54 and powers.
In the present embodiment, see also Figure 10, it shows the vacuum aluminum rod structure synoptic diagram of a kind of electromagnetic valve body position detecting circuit that the application provides, wherein vacuum aluminum post 52 inner hollow outs, Hall element 1 embedded being inserted in the vacuum aluminum post 52, vacuum aluminum post 52 corresponding Hall elements 1.It is fixing with fixed head 51 with Hall element 1 to be arranged on vacuum aluminum post 52 several Hall element fixed orifices 53 on every side, so that Hall element plate 11 is fixed on the fixed support 5, guarantees the stability of Hall element plate 11.
Vacuum aluminum is lived 52 embedded being inserted in the solenoid, and Hall element 1 detects changes of magnetic field, output voltage signal.
Need to prove that each embodiment in this instructions all adopts the mode of going forward one by one to describe, what each embodiment stressed is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.
Need to prove, in this article, relational terms such as the first and second grades only is used for an entity or operation are made a distinction with another entity or operation, and not necessarily requires or hint and have the relation of any this reality or sequentially between these entities or the operation.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby not only comprise those key elements so that comprise process, method, article or the equipment of a series of key elements, but also comprise other key elements of clearly not listing, or also be included as the intrinsic key element of this process, method, article or equipment.Do not having in the situation of more restrictions, the key element that is limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises described key element and also have other identical element.
More than a kind of electromagnetic valve body position detecting circuit that the application is provided be described in detail, used specific case herein the application's principle and embodiment are set forth, the explanation of above embodiment just is used for helping to understand the application's method and core concept thereof; Simultaneously, for one of ordinary skill in the art, the thought according to the application all will change in specific embodiments and applications, and in sum, this description should not be construed as the restriction to the application.
Claims (10)
1. an electromagnetic valve body position detecting circuit is characterized in that, comprising:
For detection of changes of magnetic field, output is proportional to the Hall element of the voltage signal of magnetic field intensity;
Be connected with the output terminal of described Hall element, be used for the signal condition holding circuit of regulating described voltage signal;
Be connected with the output terminal of described signal condition holding circuit, be used for the signal output interface of the voltage signal of output after described signal condition holding circuit is regulated.
2. testing circuit according to claim 1 is characterized in that, described signal condition holding circuit comprises: input stage circuit, intergrade circuit and output-stage circuit, wherein,
Described input stage circuit is connected with the output terminal of described Hall element, and wherein said input stage circuit comprises signal input part, and the output terminal of described Hall element is connected with described signal input part;
Described intergrade circuit is connected with described input stage circuit, and wherein said intergrade circuit comprises amplifying circuit, and the output terminal of described input stage circuit is connected with the input end of described amplifying circuit;
Described output-stage circuit is connected with described intergrade circuit, and wherein said output-stage circuit comprises holding circuit, and the output terminal of described amplifying circuit is connected with the input end of described holding circuit.
3. testing circuit according to claim 2 is characterized in that, described amplifying circuit is differential amplifier circuit, and wherein said differential amplifier circuit comprises differential amplifier.
4. testing circuit according to claim 3 is characterized in that, described input stage circuit also comprises: the signal reference edge that is connected with the input end of described differential amplifier circuit.
5. testing circuit according to claim 4, it is characterized in that, described input stage circuit also comprises: polarity switching, wherein, described polarity switching comprises the first output terminal, the second output terminal, first input end, the second input end, the first toggle switch and the second toggle switch, wherein
The first output terminal of described polarity switching is connected with the normal phase input end of described differential amplifier circuit;
The second output terminal of described polarity switching is connected with the negative-phase input of described differential amplifier circuit;
The first input end of described polarity switching is connected with described signal input part;
The second input end of described polarity switching is connected with described signal reference edge;
One end of the first toggle switch of described polarity switching is connected with the first output terminal of described polarity switching, and the other end is connected with first input end or second input end of described polarity switching;
One end of the second toggle switch of described polarity switching is connected with the second output terminal of described polarity switching, and the other end is connected with first input end or second input end of described polarity switching.
6. testing circuit according to claim 5 is characterized in that, described holding circuit comprises: class AB power amplification circuit, frequency compensated circuit, current foldback circuit and driving circuit, wherein,
Described class AB power amplification circuit comprises amplifier, the first bipolar junction transistor BJT, the second bipolar junction transistor BJT;
The normal phase input end of wherein said amplifier is connected with the output terminal of described differential amplifier circuit;
The negative-phase input of described amplifier is connected with described signal output interface;
Wherein said the first bipolar junction transistor BJT is NPN type triode, and described the second bipolar junction transistor BJT is the positive-negative-positive triode;
Described frequency compensated circuit comprises capacitor C, and described capacitor C is connected between the negative-phase input of the output terminal of described amplifier and described amplifier;
Described current foldback circuit comprises the first constant-current source circuit, the second constant-current source circuit, first group of diode, second group of diode, the 3rd group of diode, the first commutation circuit and the second commutation circuit;
Wherein said first group of diode, second group of diode and the 3rd group of diode are respectively forward two diodes of series connection;
Described the first constant-current source circuit is connected with the normal phase input end of described first group of diode;
The tie point of two diodes is connected with the normal phase input end of described second group of diode in described first group of diode;
The tie point of two diodes is connected with the output terminal of described amplifier in described second group of diode;
The output terminal of described second group of diode is connected with the input end of described the 3rd group of diode;
The tie point of two diodes is connected with described the second constant-current source circuit in described the 3rd group of diode;
Described the first commutation circuit connects the tie point of the base stage of the output terminal of described the first constant-current source circuit and described the first bipolar junction transistor BJT;
Described the second commutation circuit connects the tie point of the base stage of the input end of described the second constant-current source circuit and described the second bipolar junction transistor BJT;
The emitter of described the first bipolar junction transistor BJT is connected by two diodes of forward connecting with the emitter of described the second bipolar junction transistor BJT;
The emitter of described the first bipolar junction transistor BJT connects the anode of described two diodes of forward connecting;
The emitter of described the second bipolar junction transistor BJT connects the negative electrode of described two diodes of forward connecting;
And the tie point of two diodes of described two diodes of forward connecting is connected with described signal output interface;
Described driving circuit comprises the first driving circuit and the second driving circuit;
The input end of wherein said the first driving circuit connects outside positive 15V supply voltage, and output terminal is connected with described the first bipolar junction transistor BJT collector;
The input end of described the second driving circuit is connected with the collector of described the second bipolar junction transistor BJT, and output terminal connects outside negative 15V supply voltage.
7. testing circuit according to claim 1 is characterized in that, described Hall element is installed on the Hall element plate.
8. testing circuit according to claim 7 is characterized in that, described Hall element plate is fixed on the fixed support.
9. testing circuit according to claim 8 is characterized in that, described fixed support comprises:
Fixed head;
Be arranged on several vacuum aluminum posts on the described fixed head;
Be arranged on described vacuum aluminum post several Hall element fixed orifices on every side;
Motor power supply terminal via hole.
10. testing circuit according to claim 9 is characterized in that, described Hall element is embedded to be inserted in described vacuum aluminum post.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220520162 CN202815121U (en) | 2012-10-11 | 2012-10-11 | Solenoid valve position detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220520162 CN202815121U (en) | 2012-10-11 | 2012-10-11 | Solenoid valve position detection circuit |
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| Publication Number | Publication Date |
|---|---|
| CN202815121U true CN202815121U (en) | 2013-03-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220520162 Expired - Lifetime CN202815121U (en) | 2012-10-11 | 2012-10-11 | Solenoid valve position detection circuit |
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| CN (1) | CN202815121U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110557056A (en) * | 2019-09-25 | 2019-12-10 | 北京晶德科技有限公司 | Magnetic ring detection device of three-phase switch reluctance motor |
| CN115567010A (en) * | 2022-10-12 | 2023-01-03 | 中船重工安谱（湖北）仪器有限公司 | Input source control system and method and amplifying circuit |
-
2012
- 2012-10-11 CN CN 201220520162 patent/CN202815121U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110557056A (en) * | 2019-09-25 | 2019-12-10 | 北京晶德科技有限公司 | Magnetic ring detection device of three-phase switch reluctance motor |
| CN115567010A (en) * | 2022-10-12 | 2023-01-03 | 中船重工安谱（湖北）仪器有限公司 | Input source control system and method and amplifying circuit |
| CN115567010B (en) * | 2022-10-12 | 2024-01-30 | 中船重工安谱（湖北）仪器有限公司 | Input source control system, method and amplifying circuit |
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Address after: 4 / F, building 1, No.14 Jiuxianqiao Road, Chaoyang District, Beijing 100020 Patentee after: Beijing Jingwei Hengrun Technology Co.,Ltd. Address before: 100101 Beijing city Chaoyang District Anxiang Beili 11 B block 8 layer Patentee before: Beijing Jingwei HiRain Technologies Co.,Ltd. |
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Granted publication date: 20130320 |