CN204903741U - Multiplexing power leak hunting automatic control device of multichannel - Google Patents
Multiplexing power leak hunting automatic control device of multichannel Download PDFInfo
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- CN204903741U CN204903741U CN201520688481.XU CN201520688481U CN204903741U CN 204903741 U CN204903741 U CN 204903741U CN 201520688481 U CN201520688481 U CN 201520688481U CN 204903741 U CN204903741 U CN 204903741U
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Abstract
The utility model discloses a multiplexing power leak hunting automatic control device of multichannel, including a plurality of accurate resistance network, voltage gating switching circuit, leak hunting circuit, sampling circuit, AD converting circuit, level shifting circuit, controller. Wherein each way treats that detection voltage is connected with each accurate resistance network respectively, and accurate resistance network passes through resistive voltage divider realize to step down to be handled, and voltage gating switching circuit passes through the switch -on that certain voltage of going the same way was realized to the transfer relay, according to system requirements through transfer relay gating go the same way circuit realize just leaking electricity way, burden electric leakage way or the switch -on of zero -bit circuit in the leak hunting circuit. It in order to convert data signal into, send the entry control ware to handle the leakage detection process in order to accomplish certain voltage of going the same way through level shifting circuit to send analog signal into AD converting circuit through sampling circuit. The utility model discloses automatic, the real -time leak hunting electricity of system can be accomplished under this accuse or programme -controlled condition to the device, realizes the multichannel and treats the leakage detection on arbitrary way among the detection voltage.
Description
Technical field
The utility model relates to automatic control technology field, is specifically related to the power supply leak detection automaton that a kind of hyperchannel is multiplexing.
Background technology
In onboard system, leak electricity as an important potential safety hazard, harmfulness is very big.Therefore, in Testing and emission system, detection of electrical leakage is requisite ingredient in whole system.Detecting electric leakage method in current system is all completed by manual hand manipulation, there is certain drawback in it: automaticity is lower, detection efficiency is lower, can only provide electric result of hunting leak qualitatively, cannot quantize electric leakage degree, rely on manual operation and interpretation completely, easily cause maloperation, judge by accident and fail to judge.In system, multiple unit uses respective leak detection circuit, there is the waste of resource to a certain extent.
Utility model content
For above defect or the Improvement requirement of prior art, the purpose of this utility model is the power supply leak detection automaton providing a kind of hyperchannel multiplexing, can realize automatic, the real-time leak detection electricity of system under this control or program control condition.
The utility model solves the technical scheme that its technical matters adopts, the power supply leak detection automaton providing a kind of hyperchannel multiplexing, described device comprises multiple precision resistance network, voltage gating commutation circuit, leak detection circuit, sample circuit, A/D convertor circuit, level shifting circuit and controller
Wherein, each precision resistance network input connects each road voltage to be detected respectively, output terminal all connects the first input end of voltage gating commutation circuit, for carrying out step-down process to described each road voltage to be detected, to ensure that the voltage entering into voltage gating commutation circuit is in preset range;
The output terminal of described voltage gating commutation circuit connects leak detection circuit input end, the second input end connection control device first output terminal, for receiving the connection control signal that controller sends, to realize the connection of a certain road voltage in the voltage to be detected of described each road;
Described leak detection circuit output end connects sample circuit input end, and for realizing positive drain circuit, negative drain circuit or zero-bit circuit ON to the voltage after connection, the simulating signal after output circuit connection is to sample circuit;
Described sample circuit output terminal connects A/D convertor circuit input end, for receiving the simulating signal that leak detection circuit sends, and realizing circuit be zero-bit circuit, voltage sample when examining positive drain circuit or the negative drain circuit of inspection, the simulating signal after sampling is sent to A/D convertor circuit;
Described A/D convertor circuit output terminal connects level shifting circuit input end, for the simulating signal after described sampling being converted to digital signal and being sent to level shifting circuit;
Described level shifting circuit output terminal connection control device first input end, makes the digital signal after changing meet controller requirement, the described digital signal met the demands is sent to controller after carrying out level conversion to described digital signal;
Described controller is used for calculating the digital signal after level conversion, judges the drain conditions of voltage to be detected, output detections result.
As further preferably, described device also comprises this control telecommunication circuit, programmed communication circuit, display and warning circuit and host computer,
Described control telecommunication circuit input end connection control device second output terminal, output terminal connects display and warning circuit input end, for described testing result being sent to display and warning circuit;
Described display and warning circuit input end connect this control telecommunication circuit output terminal, for showing described testing result, and report to the police when testing result is discontented with pedal system requirement;
Described programmed communication circuit first input end connection control device the 3rd output terminal, the second input end connects host computer output terminal, and the first output terminal connects host computer input end, transmits for the data realizing controller and host computer;
Described host computer is used for sending detection signal to controller by programmed communication circuit, is converted to described connection control signal, realizes the connection of a certain road voltage in the voltage to be detected of described each road with driving voltage gating commutation circuit by controller; Host computer is also for receiving the testing result of controller transmission by programmed communication circuit and carrying out showing and processing.
As further preferably, described leak detection circuit comprises zero-detection position circuit, examines positive drain circuit and the negative drain circuit of inspection, described zero-detection position circuit comprises the first relay K 2H, and the first relay K 2H input end connects voltage gating commutation circuit output terminal, and output terminal connects sample circuit input end; Examine positive drain circuit and comprise the second relay K 2B and the 3rd relay K 2D, wherein second relay K 2B one end is connected with JK, one end is connected with the JL+ of voltage gating commutation circuit by resistance R4,3rd relay K 2D one end is connected with JL-, and one end is connected with the JL+ of voltage gating commutation circuit by resistance R3; The negative drain circuit of inspection comprises the second relay K 2B, the 3rd relay K 2D and the 4th relay K 2F, wherein second relay K 2B one end is connected with JK, one end is connected with the 4th relay K 2F, 4th other one end of relay K 2F is connected with the JL+ of voltage gating commutation circuit, 3rd relay K 2D one end is connected with JL-signal, and one end is connected with the JL+ of voltage gating commutation circuit by resistance R3; Described JK is casing signal, described JL+ be the anode of the detected voltage power supply after electric resistance partial pressure just, JL-is the power-of negative terminal after electric resistance partial pressure of detected voltage.
Therefore, the utility model can obtain following beneficial effect: leak detection circuit of the present utility model, sample circuit, AD circuit adopt modularization, General design, it is time sharing shared when multichannel voltage detects, according to system needs, can the automatic just undetected survey on any road in real-time implementation multichannel voltage to be detected, negative undetected survey and the electrical leakage voltage by gathering, and can leak resistance be calculated, quantize electric leakage degree, testing result can the display screen display in real time under this control state or the display of the host computer under programmed state.Leak detection aut.eq. integrated level of the present utility model is high, volume is little, reliability is high, antijamming capability and environmental suitability strong, is applicable to the sampling with high precision under hyperchannel, timesharing and rugged surroundings, can be conveniently used in all kinds of workplace.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:
Fig. 1 is the multiplexing power supply leak detection automaton structural representation of the utility model hyperchannel;
Fig. 2 is the utility model precision resistance lattice network structural representation;
Fig. 3 is the utility model voltage gating commutation circuit structural representation;
Fig. 4 is the utility model leak detection electrical block diagram;
Fig. 5 is the utility model sample circuit structural representation.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.In addition, if below in described each embodiment of the utility model involved technical characteristic do not form conflict each other and just can mutually combine.
As shown in Figure 1, the utility model device is made up of multiple precision resistance network, voltage gating commutation circuit, leak detection circuit, sample circuit, AD circuit, level shifting circuit and controller.
Wherein, each precision resistance network input connects each road voltage to be detected respectively, and output terminal all connects the first input end of voltage gating commutation circuit.Precision resistance network realizes the step-down process to detecting voltage, to ensure that the voltage entering into voltage gating commutation circuit is in the zone of reasonableness required by electric resistance partial pressure.
The output terminal of voltage gating commutation circuit connects leak detection circuit input end, the second input end connection control device first output terminal.The connection control signal that voltage gating commutation circuit sends for receiving controller, realizes the connection of a certain road voltage with the relay switching its inside.
Leak detection circuit output end connects sample circuit input end, for passing through the connection switching the positive drain circuit of relay gating a certain road circuit realiration of its inside, negative drain circuit or zero-bit circuit according to system requirements.
Described sample circuit output terminal connects A/D convertor circuit input end, for receive simulating signal that leak detection circuit sends and realizing circuit be zero-detection position circuit, examine positive drain circuit or inspection negative drain circuit time voltage sample (realizing by operational amplifier and isolated amplifier), be sent to A/D convertor circuit after process.
A/D convertor circuit output terminal connects level shifting circuit input end, for the simulating signal after sampling is converted to digital signal and is sent to level shifting circuit.
Level shifting circuit output terminal connection control device first input end, makes the electric signal after changing meet controller requirement, and is sent to controller after carrying out level conversion to described digital signal.
Controller is used for calculating the digital signal after level conversion, to judge the drain conditions detecting voltage, output detections result.
In practical application, in order to more conveniently show testing result intuitively, realize to power supply to be checked control, the utility model device also comprises this control telecommunication circuit, programmed communication circuit, display and warning circuit and host computer.
This control telecommunication circuit input end connection control device second output terminal, output terminal connects display and warning circuit input end, for described testing result being sent to display and warning circuit.
Display and warning circuit input end connect this control telecommunication circuit output terminal, for showing described testing result, and report to the police when testing result is discontented with pedal system requirement.
Programmed communication circuit first input end connection control device the 3rd output terminal, the second input end connects host computer output terminal, and the first output terminal connects host computer input end, transmits for the data realizing controller and host computer.
Host computer is used for sending detection signal to controller by programmed communication circuit, is converted to connection control signal, realizes the connection of a certain road voltage in the voltage to be detected of described each road with driving voltage gating commutation circuit by controller; Host computer is also for receiving the testing result of controller transmission by programmed communication circuit and showing.
Below in conjunction with a specific embodiment, the utility model scheme is described further.
As shown in Figure 1, the utility model is made up of precision resistance network, voltage gating commutation circuit, leak detection circuit, sample circuit, AD circuit, level shifting circuit, controller, this control telecommunication circuit, programmed communication circuit and display and warning circuit.
Wherein, precision resistance network forms bleeder circuit by resistance R1 and R2, as shown in Figure 2.Precision resistance network is used for converting the detection voltage V1 of input to V1out, the intrinsic standoff ratio that different detection voltage is corresponding different, and wherein the size of R1 and R2 value is determined by the sample range of sample circuit.For ensureing the linearity of A/D convertor circuit and improving the precision of sampling, usually ensure that the numerical value after precision resistance network dividing potential drop is near the intermediate value of A/D chip sample range, and resistance all chooses precision resistance.
As shown in Figure 3, wherein routing relay K1B and K1D of voltage gating commutation circuit forms.Wherein, the gating of K switch 1A control K1B and disconnection, the gating of K switch 1C control K1D and disconnection.Controller sends control signal, through level conversion, then pilot relay run and disconnected to realize the Voltage On state after the dividing potential drop of a certain distance.When KZ_+V1out and KZ_+V1out is high simultaneously, relay K 1B and K1D is just in closure state, circuit ON.For ensureing security and the reliability of circuit, in director demon, the control signal of relay being done and process, namely having ensured that any one moment only has a wherein road relay to be in on-state or all relays are in off-state.
Leak detection circuit is for realizing the circuit switching each road being detected to the state of just leaking of voltage, negative leakage state, zero-bit state.Leak detection circuit usually by zero-detection position circuit, examine positive drain circuit and the negative drain circuit of inspection forms, as shown in Figure 4, in the present embodiment, leak detection circuit comprises zero-detection position circuit, examines positive drain circuit and the negative drain circuit of inspection, its annexation is the connecting and disconnecting of the control signal JLLW pilot relay K2H of zero-detection position circuit, examine the control signal JLZL1 of positive drain circuit and the connecting and disconnecting of JLZL2 difference pilot relay K2B and K2D, the connecting and disconnecting of the control signal JLFL pilot relay K2F of the negative drain circuit of inspection.
Because detection voltage is multichannel, there is the deviation of different parameters in different devices, is the accuracy ensureing to detect, before each leak detection starts, and all necessary first zero check.Using the zero value of sampling as reference value, zero-bit is just leaked after having sampled again, negative sampling of leaking.As shown in Figure 4, wherein JK is casing signal, is connected with the casing of real system by cable, JL+ be the anode of the detected voltage N power supply after electric resistance partial pressure just, JL-is the power-of negative terminal after electric resistance partial pressure of detected voltage N.Leak detection specific implementation process is:
The first step, under guarantee voltage gating commutation circuit is all in the prerequisite of disconnection, set high by zero-detection position circuit control signal JLLW, closing relay K2H, gather zero value V0, the V0 value of collection gathers the zero value of other magnitude of voltage as AD.Then JLLW is set low, disconnect K2H;
Second step, by voltage gating commutation circuit gating one road voltage, sampling magnitude of voltage is now V1;
3rd step, positive for inspection drain circuit control signal JLZL1 and JLZL2 is set high, closing relay K2B and K2D, resistance R3 and R4 place in circuit change the structure of primary circuit, JL+ is connected with system chassis by R4, magnitude of voltage V2 under sampling just leakage state now, then sets low JLZL1 and JLZL2, disconnects relay K 2B and K2D;
4th step, positive drain circuit control signal JLZL1 and JLZL2 and inspection are born drain circuit control signal JLFL set high simultaneously, closing relay K2B, K2D and K2F, resistance R3 place in circuit changes the structure of primary circuit, JL-is connected with system chassis by R3, magnitude of voltage V2 ' under sampling negative leakage state now, then disconnects relay K 2B, K2D and K2F.
5th step, V1, V2, V1 according to gathering ', V2 ' value substitute into the electric formula of leak detection can calculation system just leaking, under negative leakage state electric leakage situation.The formula of leak detection electricity obtains positive leakage resistance formula according to the resistance in Fig. 1 precision resistance network and Fig. 4 resistance calculations examined in leakage circuit
With negative leakage resistance formula
i.e. V
1' for relay K 2B, K2D and K2F close before magnitude of voltage, V
2' for K2B, K2D and K2F close after magnitude of voltage.In the utility model preferred embodiment, R1=R4=150K, R2=R3=24.9K (carrying out approximate treatment process by 25K during calculating), switched by relay, translation circuit structure, just leaking formula and be:
The negative formula that leaks is:
Sample circuit is used for voltage sample when realizing circuit is in zero-detection position circuit or examines positive drain circuit or examine negative drain circuit.As shown in Figure 5, in the present embodiment, sample circuit is made up of operational amplifier N1, N3 and isolated amplifier N2, and isolated amplifier N2 ensure that the voltage between input voltage and controller is completely isolated and opens.
In the present embodiment, AD circuit preferably has the successive approximation analog to digital conversion chip AD1674ARZ that 12 are treated parallel microcomputer interface, only need 10 μ s its switching time, there are four kinds of input ranges available, for ensureing the versatility of circuit, have employed the input range of 0-20V in this design, export and adopt parallel mode.
Controller can select DSP (DigitalSignalProcessor), FPGA (FieldProgrammableGateArray), ARM (AdvancedRISCMachines) or SoC (SystemonChip) usually.Controller is for realizing control to voltage gating commutation circuit repeat circuit, being communicated by RS485, communicated and process sample magnitude by Ethernet with host computer with the display screen of display and warning circuit, whether concrete processing procedure leaks electricity according to the value decision circuitry of V0, V1 and V2, and then can calculate the equivalent electrical circuit of electric leakage.Result of calculation is delivered to display by this control telecommunication circuit and warning circuit carries out showing or carrying out sound and light alarm, or deliver to host computer by programmed communication circuit and show.
This control telecommunication circuit completes the data communication of controller and display screen by RS485 circuit.It is that the embedded ethernet of ZNE-100TL turns serial port module that ethernet module can be preferably model, and can realize the mutual conversion of serial ports and Ethernet, transplantability is strong.Host computer is hunted leak to any road power supply of system in real time by programmed communication circuit.
Display and warning circuit are used for the leak detection situation and equivalent resistance that detect voltage to show constantly on a display screen; so that the inspection drain conditions of each several part power supply of quantitative grasp system; simultaneously when there being any road electric leakage index to exceed designated value; according to electric leakage degree; sound or light warning will be carried out; or upload to host computer, to remind, wherein a certain road power supply is processed, play the effect that protection system protects personal safety simultaneously.
Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (3)
1. the power supply leak detection automaton that hyperchannel is multiplexing, is characterized in that, described device comprises multiple precision resistance network, voltage gating commutation circuit, leak detection circuit, sample circuit, A/D convertor circuit, level shifting circuit and controller,
Wherein, each precision resistance network input connects each road voltage to be detected respectively, output terminal all connects the first input end of voltage gating commutation circuit, for carrying out step-down process to described each road voltage to be detected, to ensure that the voltage entering into voltage gating commutation circuit is in preset range;
The output terminal of described voltage gating commutation circuit connects leak detection circuit input end, the second input end connection control device first output terminal, for receiving the connection control signal that controller sends, to realize the connection of a certain road voltage in the voltage to be detected of described each road;
Described leak detection circuit output end connects sample circuit input end, and for realizing positive drain circuit, negative drain circuit or zero-bit circuit ON to the voltage after connection, the simulating signal after output circuit connection is to sample circuit;
Described sample circuit output terminal connects A/D convertor circuit input end, for receiving the simulating signal that leak detection circuit sends, and realizing circuit be zero-bit circuit, voltage sample when examining positive drain circuit or the negative drain circuit of inspection, the simulating signal after sampling is sent to A/D convertor circuit;
Described A/D convertor circuit output terminal connects level shifting circuit input end, for the simulating signal after described sampling being converted to digital signal and being sent to level shifting circuit;
Described level shifting circuit output terminal connection control device first input end, makes the digital signal after changing meet controller requirement, the described digital signal met the demands is sent to controller after carrying out level conversion to described digital signal;
Described controller is used for calculating the digital signal after level conversion, judges the drain conditions of voltage to be detected, output detections result.
2. the power supply leak detection automaton that hyperchannel as claimed in claim 1 is multiplexing, it is characterized in that, described device also comprises this control telecommunication circuit, programmed communication circuit, display and warning circuit and host computer,
Described control telecommunication circuit input end connection control device second output terminal, output terminal connects display and warning circuit input end, for described testing result being sent to display and warning circuit;
Described display and warning circuit input end connect this control telecommunication circuit output terminal, for showing described testing result, and report to the police when testing result is discontented with pedal system requirement;
Described programmed communication circuit first input end connection control device the 3rd output terminal, the second input end connects host computer output terminal, and the first output terminal connects host computer input end, transmits for the data realizing controller and host computer;
Described host computer is used for sending detection signal to controller by programmed communication circuit, is converted to described connection control signal, realizes the connection of a certain road voltage in the voltage to be detected of described each road with driving voltage gating commutation circuit by controller; Host computer is also for receiving the testing result of controller transmission by programmed communication circuit and carrying out showing and processing.
3. the power supply leak detection automaton that hyperchannel as claimed in claim 1 or 2 is multiplexing, it is characterized in that, described leak detection circuit comprises zero-detection position circuit, examines positive drain circuit and the negative drain circuit of inspection, described zero-detection position circuit comprises the first relay K 2H, first relay K 2H input end connects voltage gating commutation circuit output terminal, and output terminal connects sample circuit input end; Examine positive drain circuit and comprise the second relay K 2B and the 3rd relay K 2D, wherein second relay K 2B one end is connected with JK, one end is connected with the JL+ of voltage gating commutation circuit by resistance R4,3rd relay K 2D one end is connected with JL-, and one end is connected with the JL+ of voltage gating commutation circuit by resistance R3; The negative drain circuit of inspection comprises the second relay K 2B, the 3rd relay K 2D and the 4th relay K 2F, wherein second relay K 2B one end is connected with JK, one end is connected with the 4th relay K 2F, 4th other one end of relay K 2F is connected with the JL+ of voltage gating commutation circuit, 3rd relay K 2D one end is connected with JL-signal, and one end is connected with the JL+ of voltage gating commutation circuit by resistance R3; Described JK is casing signal, described JL+ be the anode of the detected voltage power supply after electric resistance partial pressure just, JL-is the power-of negative terminal after electric resistance partial pressure of detected voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520688481.XU CN204903741U (en) | 2015-09-07 | 2015-09-07 | Multiplexing power leak hunting automatic control device of multichannel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520688481.XU CN204903741U (en) | 2015-09-07 | 2015-09-07 | Multiplexing power leak hunting automatic control device of multichannel |
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| Publication Number | Publication Date |
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| CN204903741U true CN204903741U (en) | 2015-12-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520688481.XU Withdrawn - After Issue CN204903741U (en) | 2015-09-07 | 2015-09-07 | Multiplexing power leak hunting automatic control device of multichannel |
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| CN (1) | CN204903741U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105093134A (en) * | 2015-09-07 | 2015-11-25 | 湖北三江航天万峰科技发展有限公司 | Multi-path multiplexing type power supply leakage detection automatic control device |
| CN109975605A (en) * | 2019-04-02 | 2019-07-05 | 中国原子能科学研究院 | A kind of multi channel detector leakage current automatic measurement system |
-
2015
- 2015-09-07 CN CN201520688481.XU patent/CN204903741U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105093134A (en) * | 2015-09-07 | 2015-11-25 | 湖北三江航天万峰科技发展有限公司 | Multi-path multiplexing type power supply leakage detection automatic control device |
| CN105093134B (en) * | 2015-09-07 | 2018-01-05 | 湖北三江航天万峰科技发展有限公司 | A kind of power supply leak detection automaton of multichannel multiplexing |
| CN109975605A (en) * | 2019-04-02 | 2019-07-05 | 中国原子能科学研究院 | A kind of multi channel detector leakage current automatic measurement system |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20151223 Effective date of abandoning: 20180105 |