CN102377156A - Ground detection protective device for electric power comprehensive test vehicle - Google Patents
Ground detection protective device for electric power comprehensive test vehicle Download PDFInfo
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- CN102377156A CN102377156A CN2010102512063A CN201010251206A CN102377156A CN 102377156 A CN102377156 A CN 102377156A CN 2010102512063 A CN2010102512063 A CN 2010102512063A CN 201010251206 A CN201010251206 A CN 201010251206A CN 102377156 A CN102377156 A CN 102377156A
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Abstract
The invention discloses a ground detection protective device for an electric power comprehensive test vehicle, comprising a hardware simulating detection control module used for receiving impedance signals of ground of an electric conductive tire and direct ground of a chassis; the hardware simulating detection control module is connected with and used for controlling a power on executive circuit which is also connected with and controlled by a software digital detection control module; the software digital detection control module is interconnected with the hardware simulating detection control module; and the software digital detection control module is used for acquiring intermediate information of the hardware simulating detection control module. The ground detection protective device can detect the minor difference between ground of the electric conductive tire and direct ground of the chassis, thereby effectively judging whether ground is reliable.
Description
Technical field
The present invention relates to a kind of high voltage electric power equip ment experimental technique field, concrete a kind of electric combined test car ground connection that relates to is detected protective device.
Background technology
Electric combined test car is a kind of vehicular intensification computer control pilot system, is carrier with the automobile, and pilot system is installed in the car with modular construction, accomplishes experiment work by computer control.
Pilot system like above-mentioned vehicle-mounted instrument is the high voltage test instrument, and therefore ground connection being guarantees personal safety and the smooth top priority of accomplishing of experiment work reliably.
At present in the pilot system experiment work in the electric combined test car, mainly be artificial ground, this kind earthing method is the life and property loss that carelessness brought that keeps away unavoidable people.
The tire of electric combined test car originally is the insulation tire; The detection that whether is grounded that can be more or less freely; But for the static that produces that vehicle is in operation is discharged into ground, the tire of existing power combined test car has changed conductive tyre into, and this itself is a kind of progress; But in the power equipment experiment work, conductive tyre ground connection is not paid and is closed ground protection rules strict demand in the power test.And the direct ground connection of conductive tyre ground connection and vehicle frame, impedance ground has only minute differences.Convert the size of voltage signal to from impedance ground, existing measure can't have been offered an explanation whether closely safety ground.
Summary of the invention
For overcoming deficiency of the prior art; The object of the present invention is to provide a kind of electric combined test car ground connection to detect protective device; This ground connection is detected protective device can detect the minute differences of conductive tyre ground connection and the direct ground connection impedance ground of vehicle frame, thereby effectively judges whether reliable ground.
For solving the problems of the technologies described above, reach above-mentioned technical purpose, the present invention adopts following technical scheme:
A kind of electric combined test car ground connection is detected protective device; It comprises that one is used to receive the hardware simulation detection control module of conductive tyre ground connection and the directly grounded impedance signal of vehicle frame; Said hardware simulation detects control module and connects control one executive circuit that powers on; The said executive circuit that powers on also connects and is controlled by a software Digital Detecting control module; Said software Digital Detecting control module and said hardware simulation detect control module and interconnect, and said software Digital Detecting control module is used to gather the average information that said hardware simulation detects control module.
Preferably, said software Digital Detecting control module also is connected with a host computer, and said host computer is used to carry out man-machine communication.
Further; Said hardware simulation detects control module and comprises: one be used to accomplish conductive tyre ground connection and the directly grounded impedance of vehicle frame the input impedance photoelectricity isolation sample circuit, that calculates of difference be used to accomplish the exponent arithmetic signal expansion circuit, that said impedance difference is carried out the non-linear amplification of index and be used to accomplish the signal filtering comparison circuit that signal-pulse duration automatic switching circuit and that impedance contrast value signal after will amplifying converts pulse duration to is used to realize signal filtering and comparing function; Said input impedance photoelectricity is isolated sample circuit and is connected said exponent arithmetic signal expansion circuit; Said exponent arithmetic signal expansion circuit connects said signal-pulse duration automatic switching circuit; Said signal-pulse duration automatic switching circuit connects said signal filtering comparison circuit, and said signal filtering comparison circuit connects the said executive circuit that powers on.
Further; Said software Digital Detecting control module is a fuzzy operation automatic control system based on SCM system; Said SCM system is provided with; One is connected in the signal sampling port after said input impedance photoelectricity is isolated sample circuit; One is connected in the exponent arithmetic port behind the said exponent arithmetic signal expansion circuit, and one is connected in pulse-width samples port and behind signal-pulse duration automatic switching circuit is used for the fuzzy operation control port that is connected with the said executive circuit that powers on, and described signal sampling, exponent arithmetic, pulse-width samples and paste s operation control are accomplished through the inner program of said SCM system.
Preferably; Said SCM system connects one, light alarm module, and described sound, light alarm module are used for reminding operating personnel detecting instrument ground when bad; And notify said SCM system to cut off all appts power supply, prevent to cause the accident because of imperfect earth.
Preferably, said SCM system connects a LED instrument run indicator module, and said LED instrument run indicator module is used to indicate the instrument that is moving, and is convenient to operating personnel and gets information about.
The course of work of the present invention is following:
1) system boot initialization;
2) sampled input signal comprises said conductive tyre impedance ground and the direct impedance ground of vehicle frame;
3) carry out the signal exponent arithmetic;
4) do you judge that the gained result is less than set point? If not, then instrument outage, the host computer of sound and light alarm, and notice simultaneously carries out man-machine current; If, sampling pulse width signal then;
5) do you judge that the gained pulse width signal is greater than set point? If not, then instrument outage, the host computer of sound and light alarm, and notice simultaneously carries out man-machine current; If then instrument powers on, the notice host computer carries out man-machine communication, and operating personnel can get information about the instrument that is moving from said LED instrument run indicator module section simultaneously.
Electric combined test car ground connection of the present invention is detected protective device; Adopt hardware computing automatic control circuit (hardware simulation detection control module) and scm software fuzzy operation to control (both sides' case of software Digital Detecting control module) automatically; Can accomplish the function of accurate judgement vehicle conductive tyre ground connection and the directly grounded impedance ground a shade of difference of vehicle frame, thereby right judgement goes out whether reliable ground of instrument.
Description of drawings
Fig. 1 is a theory diagram of the present invention.
The connection sketch map of Fig. 2 specific embodiment of the present invention.
Fig. 3 is the exponent arithmetic signal expansion circuit figure of one embodiment of the invention.
Fig. 4 is the pulse duration generation circuit diagram of an embodiment of invention.
Fig. 5 is the output waveform figure of the exponential amplifier of one embodiment of the invention.
Label declaration among the figure: 1. hardware simulation detects control module, the executive circuit that 2. powers on, 3. software Digital Detecting control module; 4. host computer, 5., the light alarm module, 6.LED instrument run indicator module; 101. input impedance photoelectricity is isolated sample circuit, 102. exponent arithmetic signal expansion circuits, 103. signals-pulse duration automatic switching circuit; 104. the signal filtering comparison circuit, 301. signal samplings, 302. exponent arithmetics; 303. pulse-width samples, 304. SCM systems, 305. stick with paste s operation control.
Embodiment
See also Fig. 1, shown in Figure 2; A kind of electric combined test car ground connection is detected protective device; It comprises that one is used to receive the hardware simulation detection control module 1 of conductive tyre ground connection and the directly grounded impedance signal of vehicle frame; Said hardware simulation detects control module 1 and connects control one executive circuit 2 that powers on; The said executive circuit 2 that powers on also connects and is controlled by a software Digital Detecting control module 3, and said software Digital Detecting control module 3 detects control module 1 with said hardware simulation and interconnects, and said software Digital Detecting control module 3 is used to gather the average information that said hardware simulation detects control module 1.
Preferably, said software Digital Detecting control module 3 also is connected with a host computer 4, and said host computer 4 is used to carry out man-machine communication.
Further; Said hardware simulation detects control module 1 and comprises: one be used to accomplish conductive tyre ground connection and the directly grounded impedance of vehicle frame the input impedance photoelectricity isolation sample circuit 101, that calculates of difference be used to accomplish the exponent arithmetic signal expansion circuit 102, that said impedance difference is carried out the non-linear amplification of index and be used to accomplish the signal filtering comparison circuit 104 that signal-pulse duration automatic switching circuit 103 and that impedance contrast value signal after will amplifying converts pulse duration to is used to realize signal filtering and comparing function; Said input impedance photoelectricity is isolated sample circuit 101 and is connected said exponent arithmetic signal expansion circuit 102; Said exponent arithmetic signal expansion circuit 102 connects said signal-pulse duration automatic switching circuit 103; Said signal-pulse duration automatic switching circuit 103 connects said signal filtering comparison circuit 104, and said signal filtering comparison circuit 104 connects the said executive circuit 2 that powers on.
Further; Said software Digital Detecting control module 3 is a fuzzy operation automatic control system based on SCM system 304; Said SCM system 304 is provided with; One is connected in signal sampling 301 ports after said input impedance photoelectricity is isolated sample circuit 101; One is connected in exponent arithmetic 302 ports behind the said exponent arithmetic signal expansion circuit 102; One is connected in the fuzzy operation that pulse-width samples 303 ports and behind signal-pulse duration automatic switching circuit 103 are used for being connected with the said executive circuit 2 that powers on controls 305 ports, described signal sampling 301, exponent arithmetic 302, pulse-width samples 303 and stick with paste s operation control 305 through the inner programs completion of said SCM system 304.
Preferably; Said SCM system 304 connects one, light alarm module 5, and described sound, light alarm module 5 are used for reminding operating personnel detecting instrument ground when bad; And notify said SCM system 304 to cut off all appts power supply, prevent to cause the accident because of imperfect earth.
Preferably, said SCM system 304 connects a LED instrument run indicator module 6, and said LED instrument run indicator module 6 is used to indicate the instrument that is moving, and is convenient to operating personnel and gets information about.
As shown in Figure 3, be the exponent arithmetic signal expansion circuit figure of one embodiment of the invention, it has selected low drift for use, low noise, the amplifier of high resistant input, and selected triode " to pipe ", the drift that comes compensation temperature to produce for use.Its output tabular form can prove:
Vi=input signal in the formula; The Vre=reference voltage; τ=constant.
The output of exponent arithmetic signal expansion circuit is the half-sinusoid of a modification, and is as shown in Figure 5, shown directly grounded original waveform of vehicle conductive tyre ground connection and vehicle frame and the non-linear amplifying circuit output waveform of process index.As can be seen from Figure 5, two kinds of situation are through the non-linear amplification of index; Their amplitude is mutually far short of what is expected with the bottom, and is as shown in Figure 4, is the pulse duration generation circuit of one embodiment of the invention; It is a comparator circuit in essence; Under the directly grounded situation of vehicle frame, give that to transfer variable resistance W2 to make pulse duration be 2.5mS, be about 1mS during electric tire ground connection.Through behind the comparator, obtained the width different pulse.Because pulsewidth differs greatly, can after comparing, just can judge accurately that vehicle conductive tyre ground connection still is the directly grounded ground connection of vehicle frame simply through the filtering integration, electrical relay in the control is the instrument power supply.
Below only be concrete exemplary applications of the present invention, protection scope of the present invention is not constituted any limitation.All employing equivalents or equivalence are replaced and the technical scheme of formation, or any to conductive tyre ground connection of vehicle described in the present invention and the directly grounded detection method of vehicle frame, all drop within the rights protection scope of the present invention.
Claims (6)
1. an electric combined test car ground connection is detected protective device; It is characterized in that; Comprise: one is used to receive the hardware simulation detection control module (1) of conductive tyre ground connection and the directly grounded impedance signal of vehicle frame; Said hardware simulation detects control module (1) and connects control one executive circuit (2) that powers on; The said executive circuit that powers on (2) also connects and is controlled by a software Digital Detecting control module (3), and said software Digital Detecting control module (3) detects control module (1) with said hardware simulation and interconnects, and said software Digital Detecting control module (3) is used to gather the average information that said hardware simulation detects control module (1).
2. electric combined test car ground connection according to claim 1 is detected protective device; It is characterized in that; Said hardware simulation detects control module (1) and comprising: one be used to accomplish conductive tyre ground connection and the directly grounded impedance of vehicle frame the input impedance photoelectricity isolation sample circuit (101), that calculates of difference be used to accomplish the exponent arithmetic signal expansion circuit (102), that said impedance difference is carried out the non-linear amplification of index and be used to accomplish the signal filtering comparison circuit (104) that signal-pulse duration automatic switching circuit (103) and that impedance contrast value signal after will amplifying converts pulse duration to is used to realize signal filtering and comparing function; Said input impedance photoelectricity is isolated sample circuit (101) and is connected said exponent arithmetic signal expansion circuit (102); Said exponent arithmetic signal expansion circuit (102) connects said signal-pulse duration automatic switching circuit (103); Said signal-pulse duration automatic switching circuit (103) connects said signal filtering comparison circuit (104), and said signal filtering comparison circuit (104) connects the said executive circuit that powers on (2).
3. electric combined test car ground connection according to claim 1 is detected protective device; It is characterized in that; Said software Digital Detecting control module (3) is a fuzzy operation automatic control system based on SCM system (304); Said SCM system (304) is provided with; One is connected in signal sampling (301) port after said input impedance photoelectricity is isolated sample circuit (101); One is connected in exponent arithmetic (302) port behind the said exponent arithmetic signal expansion circuit (102); One is connected in pulse-width samples (303) port and behind signal-pulse duration automatic switching circuit (103) is used for fuzzy operation control (305) port of being connected with the said executive circuit that powers on (2), described signal sampling (301), exponent arithmetic (302), pulse-width samples (303) and stick with paste the program completion of s operation control (305) through said SCM system (304) inside.
4. detect protective device according to claim 1 or 2 or 3 described electric combined test car ground connection, it is characterized in that said software Digital Detecting control module (3) also is connected with a host computer (4), said host computer (4) is used to carry out man-machine communication.
5. electric combined test car ground connection according to claim 3 is detected protective device; It is characterized in that; Said SCM system (304) connects one, light alarm module (5), and described sound, light alarm module (5) are used for reminding operating personnel detecting instrument ground when bad; And notify said SCM system (304) to cut off all appts power supply, prevent to cause the accident because of imperfect earth.
6. electric combined test car ground connection according to claim 3 is detected protective device; It is characterized in that; Said SCM system (304) connects a LED instrument run indicator module (6); Said LED instrument run indicator module (6) is used to indicate the instrument that is moving, and is convenient to operating personnel and gets information about.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010251206.3A CN102377156B (en) | 2010-08-11 | 2010-08-11 | Ground detection protective device for electric power comprehensive test vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010251206.3A CN102377156B (en) | 2010-08-11 | 2010-08-11 | Ground detection protective device for electric power comprehensive test vehicle |
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| CN102377156A true CN102377156A (en) | 2012-03-14 |
| CN102377156B CN102377156B (en) | 2015-01-07 |
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Citations (6)
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|---|---|---|---|---|
| CN2408466Y (en) * | 1999-09-17 | 2000-11-29 | 杨学昌 | Earthing condition monitor |
| US20070241758A1 (en) * | 2006-03-23 | 2007-10-18 | Keihin Corporation | Leakage detection circuit and battery electronic control unit |
| CN201181321Y (en) * | 2008-04-18 | 2009-01-14 | 南车株洲电力机车有限公司 | Earthing detection circuit of locomotive control circuit |
| US20090134881A1 (en) * | 2006-08-04 | 2009-05-28 | Toyota Jidosha Kabushiki Kaisha | Insulation resistance detection system, insulation resistance detection apparatus and insulation resistance detection method |
| CN101609124A (en) * | 2009-07-03 | 2009-12-23 | 株洲南车时代电气股份有限公司 | A kind of ground detecting method of power supply system of train |
| CN101743483A (en) * | 2007-05-17 | 2010-06-16 | 纽森飓风有限公司 | Improvements relating to the testing of an earth connection |
-
2010
- 2010-08-11 CN CN201010251206.3A patent/CN102377156B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2408466Y (en) * | 1999-09-17 | 2000-11-29 | 杨学昌 | Earthing condition monitor |
| US20070241758A1 (en) * | 2006-03-23 | 2007-10-18 | Keihin Corporation | Leakage detection circuit and battery electronic control unit |
| US20090134881A1 (en) * | 2006-08-04 | 2009-05-28 | Toyota Jidosha Kabushiki Kaisha | Insulation resistance detection system, insulation resistance detection apparatus and insulation resistance detection method |
| CN101743483A (en) * | 2007-05-17 | 2010-06-16 | 纽森飓风有限公司 | Improvements relating to the testing of an earth connection |
| CN201181321Y (en) * | 2008-04-18 | 2009-01-14 | 南车株洲电力机车有限公司 | Earthing detection circuit of locomotive control circuit |
| CN101609124A (en) * | 2009-07-03 | 2009-12-23 | 株洲南车时代电气股份有限公司 | A kind of ground detecting method of power supply system of train |
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Inventor after: Tang Xiangcheng Inventor after: Chen Xing Inventor after: Bao Qinghua Inventor after: Jiang Xinghui Inventor after: Huang Yongkang Inventor after: Liu Xiaozhuang Inventor after: Zhu Wenkang Inventor after: Bai Yawen Inventor after: Shu Shiyu Inventor after: Ma Shengmao Inventor before: Tang Xiangcheng Inventor before: Bao Qinghua Inventor before: Jiang Xinghui Inventor before: Huang Yongkang Inventor before: Liu Xiaozhuang Inventor before: Zhu Wenkang |
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Effective date of registration: 20151110 Address after: Good East Industrial Park Wuzhong Economic Development Zone Suzhou city Jiangsu province 215128 Pu Road No. 255 Patentee after: Suzhou Huadian Electric Co., Ltd. Patentee after: Electric Power Research Institute of State Grid Qinghai Electric Power Company Address before: Good East Industrial Park Wuzhong Economic Development Zone Suzhou city Jiangsu province 215128 Pu Road No. 255 Patentee before: Suzhou Huadian Electric Co., Ltd. |
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Effective date of registration: 20170330 Address after: Good East Industrial Park Wuzhong Economic Development Zone Suzhou city Jiangsu province 215128 Pu Road No. 255 Patentee after: Suzhou Huadian Electric Co., Ltd. Address before: Good East Industrial Park Wuzhong Economic Development Zone Suzhou city Jiangsu province 215128 Pu Road No. 255 Patentee before: Suzhou Huadian Electric Co., Ltd. Patentee before: Electric Power Research Institute of State Grid Qinghai Electric Power Company |
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