CN104090203A - Novel control loop grounding detection circuit - Google Patents
Novel control loop grounding detection circuit Download PDFInfo
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- CN104090203A CN104090203A CN201410350739.5A CN201410350739A CN104090203A CN 104090203 A CN104090203 A CN 104090203A CN 201410350739 A CN201410350739 A CN 201410350739A CN 104090203 A CN104090203 A CN 104090203A
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- light emitting
- power source
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- branch
- grounding
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Abstract
The invention relates to the technical field of grounding detection of haulage motor power source voltage systems, in particular to a novel control loop grounding detection circuit. A plurality of detection branch circuits are connected between a power source positive pole bus and a haulage motor body grounding point and arranged between a power source negative pole bus and the haulage motor body grounding point. Each branch circuit is connected with a resistor in series on the power source positive pole bus side, and connected with a resistor in series on the power source negative pole bus side. The resistance values of the resistors on the branch circuits are different. A light emitting diode is arranged on each branch circuit in a matched mode. The colors of the light emitting diodes on the different branch circuits are different. The light emitting diodes on the branch circuits on the power source positive pole bus side and the light emitting diodes on the branch circuits on the power source negative pole bus side respectively form a light column group. One branch circuit between the power source positive pole and the haulage motor body grounding point and one branch circuit between the power source negative pole and the haulage motor body grounding point are respectively connected with a solid-state relay with a contact in series, and contact signals are communicated with a microcomputer. According to the novel control loop grounding detection circuit, the severity degree of grounding voltage can be well judged, an alarm can be given in time, the grounding side and grounding voltage can be displayed through the microcomputer, and the service life of the grounding detection device is prolonged.
Description
Technical field
The present invention relates to the ground connection detection technique field of electrical locomotive power electrical voltage system, especially a kind of novel control loop grounded inspection circuit.
Background technology
The ground detection device using on internal combustion engine at present has two kinds: a kind of bulb that adopts is as ground lamp, and this ground detection device is short serviceable life; The single light emitting diode of another kind of employing is as ground lamp, and this ground detection device can not react the size variation of ground voltage.Long service life can be reached and the temporary nothing of ground detection device of the variation of ground voltage can be reliably reflected.
Summary of the invention
In order to overcome the deficiency of existing technology, the invention provides a kind of novel control loop grounded inspection circuit.
The technical solution adopted for the present invention to solve the technical problems is: a kind of novel control loop grounded inspection circuit, formed by positive source bus, power cathode bus, body grounding point and some detection branch, some detection branch is connected between positive source bus and body grounding point, power cathode bus and body grounding point, every branch road is at the resistance of connecting near power end, resistance on described same branch road is identical, and the resistance on each branch road is different; In each branch road, coupling has a light emitting diode respectively simultaneously, the color difference of different branch light emitting diode, light emitting diode on the each branch road of positive source bus end forms the first light beam group that contains different colours, light emitting diode on the each branch road of power cathode bus end forms the second light beam group that contains different colours, judges the magnitude range of ground voltage by glow color in light beam group.This programme has solved prior art and can not reliably not judge the shortcoming of the variation of voltage.
According to another embodiment of the invention, be further included in and between positive source bus and body grounding point, have the solid-state relay that is in series with a contact-carrying on a branch road, and this contact signal is communicated with microcomputer; Between positive source bus and body grounding point, having the solid-state relay that is in series with a contact-carrying on a branch road, and this contact signal is communicated with microcomputer.This programme has further solved prior art and can not reliably not judge the shortcoming of the variation of voltage, can report to the police simultaneously, directly shows the size of earth terminal and ground voltage.
According to another embodiment of the invention, further comprise the some voltage stabilizing diodes that are also provided with series connection on described each branch road between resistance and light emitting diode.The voltage of the further stable detection circuit of this programme, makes testing result reliable, and extends the serviceable life of testing circuit.
According to another embodiment of the invention, further comprise that described branch road has 14, described light beam group one, light beam group two form by 7 light emitting diodes, and described solid-state relay has 2.
The invention has the beneficial effects as follows, the present invention can judge the order of severity of ground voltage well, and can and alarm, show the size of earth terminal and ground voltage by microcomputer, extend the serviceable life of ground detection device.
Brief description of the drawings
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is electrical block diagram of the present invention.
Embodiment
A kind of novel control loop grounded inspection circuit, its circuit diagram as shown in Figure 1.
Car body ground wire is provided with 14 branch roads, near the resistance R 1 ~ R7 that is respectively equipped with different resistances on every branch road of power positive end U+, near the resistance R 8 ~ R14 that is respectively equipped with different resistances on every branch road of power supply negative terminal U-, on upper and lower corresponding branch road, the resistance at two ends is identical, as R1 and R8, R2 and R9 etc.
Simultaneously, on every branch road, coupling forms light beam by the light emitting diode of different colours and is used as ground lamp, resistance R 1 ~ the R7 of 7 branch roads of positive source bus end mates respectively light emitting diode D15 ~ D21, and the resistance R 8 ~ R14 of 7 branch roads of power cathode bus end mates respectively light emitting diode D22 ~ D28.D15 ~ D21 forms the first light beam group, contains green, yellow and red three kinds of glow colors in this light beam group, and D22 ~ D28 forms the second light beam group, contains green, yellow and red three kinds of glow colors in this light beam group.
For preventing puncturing, ensure that both end voltage is stable, on each branch road, between resistance and light emitting diode, be provided with the stabilivolt of many series connection.As Fig. 1, between R1, D15, establish stabilivolt D1, the D8 of series connection, between R2, D16, establish stabilivolt D2, the D9 etc. of series connection, between R8, D22, establish stabilivolt D29, the D36 of series connection, between R9, D23, establish stabilivolt D30, the D37 etc. of series connection.
In addition, on a branch road at R1, R8 place, be in series with respectively solid-state relay SSR1, solid-state relay SSR2 near power positive end U+, power supply negative terminal U-.Solid-state relay SSR1 is provided with signal terminal a1, a2, and solid-state relay SSR1 is provided with signal terminal a3, a4.Signal terminal a1 ~ a4 is all communicated with microcomputer.
The present invention's required electric current when setting ground voltage and light emitting diode bright light on each branch road is obtained the resistance of resistance.Ground voltage portion difference while setting bright light on each branch road, thus draw the difference of resistance.Like this, when pick-up unit work, resistance R 1 ~ R14 by different resistances on 14 branch roads draws the size of current difference of flowing through on each branch road, in the time that each branch road of flowing through reaches the required electric current of light emitting diode, light emitting diode is lighted and is sent radiance, then be used as ground lamp by the light emitting diode composition light beam group (D15 ~ D21 light beam group, D22 ~ D28 light beam group etc.) of different colours, according to the color of light beam, judge the order of severity of ground voltage, the for example color of the light emitting diode of putting in accompanying drawing, when D21 and D28 green are bright, represent not have earth fault; When anode light beam group is bright, power supply negative terminal earth fault; When power supply negative terminal is bright, represent that power positive end has earth fault.As the green light D12 in light beam, D13 or D33, D34 are green indicates that power supply negative terminal or anode have earth fault when bright, ground voltage is in the time of green light only in voltage range, but Grounding is not serious, and power supply still can move, and works the effect of informing.In the time that D19 in light beam or D32 yellow are also bright, represent power supply negative terminal or the power positive end earth fault that there is something special, ground voltage has reached the voltage that amber light is set when bright, provides warning earth fault, preferably takes corresponding measure.In the time that D15, D16, D17 or D22, D23, D24 redness in light beam are also bright, represent power supply negative terminal or the power positive end earth fault that there is something special, ground voltage has reached the voltage that red colored lamp is set when bright, provide grave warning earth fault, and the relay coil adhesive of solid-state relay SSR1 or SSR2, ground signalling is passed to microcomputer by signal terminal a1 ~ a4 by relay, microcomputer is reported to the police, and showing the size of earth terminal and ground voltage simultaneously, operating personnel should take corresponding measure immediately.
Above-mentioned is a preferred embodiment of the present invention, and certain actual branch road is not limited to 14, as long as there are two above, can to reach difference reflecting voltage effects.
The present invention can judge the order of severity of ground voltage well, and can and alarm, show the size of earth terminal and ground voltage by microcomputer, extend the serviceable life of power supply and ground detection device.
Claims (4)
1. a novel control loop grounded inspection circuit, formed by positive source bus, power cathode bus, body grounding point and some detection branch, some detection branch is connected between positive source bus and body grounding point, power cathode bus and body grounding point, it is characterized in that, every branch road is at the resistance of connecting near power end, resistance on described same branch road is identical, and the resistance on each branch road is different; In each branch road, coupling has a light emitting diode respectively simultaneously, the color difference of different branch light emitting diode, light emitting diode on the each branch road of positive source bus end forms the first light beam group that contains different colours, and the light emitting diode on the each branch road of power cathode bus end forms the second light beam group that contains different colours.
2. novel control loop grounded inspection circuit according to claim 1, is characterized in that, having the solid-state relay that is in series with contact-carrying on a branch road, and this contact signal is communicated with between positive source bus and body grounding point with microcomputer; Between positive source bus and body grounding point, having the solid-state relay that is in series with contact-carrying on a branch road, and this contact signal is communicated with microcomputer.
3. novel control loop grounded inspection circuit according to claim 1, is characterized in that, is also provided with some voltage stabilizing diodes of connecting on described each branch road between resistance and light emitting diode.
4. novel control loop grounded inspection circuit according to claim 1, is characterized in that, described branch road has 14, and described light beam group one, light beam group two form by 7 light emitting diodes, and described solid-state relay has 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410350739.5A CN104090203A (en) | 2014-07-23 | 2014-07-23 | Novel control loop grounding detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410350739.5A CN104090203A (en) | 2014-07-23 | 2014-07-23 | Novel control loop grounding detection circuit |
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| CN104090203A true CN104090203A (en) | 2014-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410350739.5A Pending CN104090203A (en) | 2014-07-23 | 2014-07-23 | Novel control loop grounding detection circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106383262A (en) * | 2016-08-29 | 2017-02-08 | 中车大连机车车辆有限公司 | Locomotive control circuit grounding detection and display device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2041427U (en) * | 1988-04-13 | 1989-07-19 | 张喜军 | Circuit detector for automobile |
| CN1044167A (en) * | 1989-01-10 | 1990-07-25 | 沈阳铁路局锦州科学技术研究所 | Electrical equipment ground detection device and method |
| CN2336366Y (en) * | 1998-06-18 | 1999-09-01 | 卢国庆 | Three color indicating device for voltage of power supply |
| CN1987496A (en) * | 2006-12-18 | 2007-06-27 | 中国南车集团株洲电力机车有限公司 | Device for controlling power earthing/under voltage warning and its control method |
| CN101261301A (en) * | 2008-04-18 | 2008-09-10 | 南车株洲电力机车有限公司 | Locomotive control loop grounding detection circuit and grounding detection method and wire break detection method |
| JP2010124578A (en) * | 2008-11-19 | 2010-06-03 | Nitto Electric Works Ltd | Disconnection detection circuit of ground wire of vehicle charging system |
| CN204044273U (en) * | 2014-07-23 | 2014-12-24 | 南车戚墅堰机车有限公司 | Novel control loop grounded inspection circuit |
-
2014
- 2014-07-23 CN CN201410350739.5A patent/CN104090203A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2041427U (en) * | 1988-04-13 | 1989-07-19 | 张喜军 | Circuit detector for automobile |
| CN1044167A (en) * | 1989-01-10 | 1990-07-25 | 沈阳铁路局锦州科学技术研究所 | Electrical equipment ground detection device and method |
| CN2336366Y (en) * | 1998-06-18 | 1999-09-01 | 卢国庆 | Three color indicating device for voltage of power supply |
| CN1987496A (en) * | 2006-12-18 | 2007-06-27 | 中国南车集团株洲电力机车有限公司 | Device for controlling power earthing/under voltage warning and its control method |
| CN101261301A (en) * | 2008-04-18 | 2008-09-10 | 南车株洲电力机车有限公司 | Locomotive control loop grounding detection circuit and grounding detection method and wire break detection method |
| JP2010124578A (en) * | 2008-11-19 | 2010-06-03 | Nitto Electric Works Ltd | Disconnection detection circuit of ground wire of vehicle charging system |
| CN204044273U (en) * | 2014-07-23 | 2014-12-24 | 南车戚墅堰机车有限公司 | Novel control loop grounded inspection circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106383262A (en) * | 2016-08-29 | 2017-02-08 | 中车大连机车车辆有限公司 | Locomotive control circuit grounding detection and display device |
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Application publication date: 20141008 |