CN103884898A - Device and method for monitoring voltages of metro track - Google Patents
Device and method for monitoring voltages of metro track Download PDFInfo
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- CN103884898A CN103884898A CN201410076841.0A CN201410076841A CN103884898A CN 103884898 A CN103884898 A CN 103884898A CN 201410076841 A CN201410076841 A CN 201410076841A CN 103884898 A CN103884898 A CN 103884898A
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Abstract
The invention discloses a device and method for monitoring voltages of a metro track. The device comprises a signal processing circuit, a wireless data transmission module and a DC voltage sensor. The signal processing circuit is connected with the data wireless transmission module through a dual in-line type pin header. The signal processing circuit is connected with the DC voltage sensor through the wire outlet end and the wire inlet end of the signal processing circuit. The wireless data transmission module is in wireless connection with an external upper computer. The signal processing circuit comprises a voltage conversion device used for converting 220 v alternating currents into 5 v direct currents so as to provide working voltages for the DC voltage sensor, the dual in-line type pin header, and a low dropout voltage regulator used for enabling 5 v DC voltages to be lowered into 3.3 v DC voltages so as to provide a working power supply for the wireless data transmission module. The invention further provides the method based on the device. The device and method for monitoring the voltages of the metro track have the advantages of being capable of achieving continuous monitoring, convenient to mount and easy to maintain.
Description
Technical field
The present invention relates to voltage monitoring research field, particularly a kind of underground railway track voltage monitor and method.
Background technology
In electrified railway traction power supply system, the problem that maintainer is existed to security threat in order to solve the maintenance of subway skylight, adopts voltage monitor to carry out the monitoring of the remaining voltage of subway the 3rd rail conventionally.Adopting voltage monitor is the scheme that solves the high and economic saving of a kind of reliability that high voltage threatens human-body safety, its basic know-why is: subway the 3rd direct current voltage sensor element of rail interval access and voltage collection circuit, to read the data of the remaining voltage of subway the 3rd rail, thereby reach the object of monitoring the remaining voltage of subway the 3rd rail.
In practical work process, in a period of time after power failure, due to subway the 3rd rail capacitive characteristic between row rail, the 3rd rail is remaining certain voltage still, need analyze the process of voltage drop conventionally.Therefore, for obtaining real-time voltage value, industry generally adopts a kind of voltage monitor, and this device is mainly made up of voltage acquisition part, analog to digital conversion circuit, three parts of isolated part circuit.Wherein analog to digital conversion circuit is realized the compensation for calibrating errors after A/D chip gathers.Above-mentioned this voltage monitor has following shortcoming: (1), due to electric circumstance more complicated, can form various interference sources, thus reduce the quality of voltage monitor.(2), due to electric circumstance more complicated, each components and parts contact is tight, if go wrong, and not easy care.(3) adopt analog-digital conversion a/d chip, additionally increased cost, and Seize ACK message treatment circuit space.
Therefore, seek a kind of monitoring device and method of being convenient to safeguard, antijamming capability is strong and cost is low and there is significant application value.
Summary of the invention
Fundamental purpose of the present invention is to overcome the shortcoming of prior art with not enough, and a kind of underground railway track voltage monitor is provided, this device have advantages of can monitor continuously, easy for installation, be easy to safeguard.
The present invention also provides a kind of monitoring method based on above-mentioned underground railway track voltage monitor.
Object of the present invention realizes by following technical scheme: underground railway track voltage monitor, comprise: signal processing circuit, data wireless transport module and direct current voltage sensor, above-mentioned signal processing circuit is connected by the dual inline type row pin in signal processing circuit with data wireless transport module, signal processing circuit is connected with end of incoming cables by the leading-out terminal of signal processing circuit with direct current voltage sensor, data wireless transport module and outside host computer wireless connections; Signal processing circuit comprise for 220v alternating current is converted to 5v direct current so that for direct current voltage sensor voltage conversion device, the dual inline type row pin of operating voltage is provided, for DC voltage 5v being reduced to DC voltage 3.3v and then providing the low difference voltage regulator of working power for data wireless transport module.
Preferably, described signal processing circuit is connected by two dual inline type row pins with data wireless transport module, and has fixing gap between two dual inline type row pins.
Preferably, for ease of fixed signal treatment circuit, in described signal processing circuit, screw is set.
Preferably, for fear of under direct current voltage sensor normal operation with high-tension defect, described direct current voltage sensor guide rail solid ground.
Preferably, described data wireless transport module arranges an A/D modular converter, carries out analog to digital conversion for the magnitude of voltage that signal processing circuit is collected.
Preferably, in described signal processing circuit, be provided with pilot lamp.Thereby can facilitate observation signal treatment circuit energising situation, be convenient to check, be easy to safeguard.
A kind of monitoring method based on above-mentioned underground railway track voltage monitor, direct current voltage sensor is positioned over to subway the 3rd rail interval place, signal processing circuit gathers according to predefined collection period the magnitude of voltage that direct current voltage sensor detects, then this magnitude of voltage is sent to outside host computer by data wireless transport module, during this time, signal processing circuit provides operating voltage to direct current voltage sensor and data wireless transport module respectively.
Preferably, to carry out data transmission be to adopt wireless network based on ZigBee technology to described data wireless transport module.Therefore do not need to increase in addition signal line.
Preferably, a default threshold value in signal processing circuit, in the time that the magnitude of voltage of direct current voltage sensor output terminal exceedes this threshold value, directly externally reports to the police.Thereby monitor the size of the remaining voltage of subway the 3rd rail, reach the object of monitoring voltage, this voltage monitoring mode is continuable.
Compared with prior art, tool has the following advantages and beneficial effect in the present invention:
1, the present invention can, by observing the remaining voltage of output end voltage monitoring subway the 3rd rail of direct current voltage sensor, have advantages of maintenance can monitored continuously, be easy to, easy for installation.
2, the present invention is simple in structure, antijamming capability is strong, and cost is lower, is convenient to promote the use of.
Brief description of the drawings
Fig. 1 is the integrated circuit schematic diagram of the present embodiment;
Fig. 2 is the circuit diagram of signal processing circuit part in the present embodiment.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
In conjunction with referring to Fig. 1, Fig. 1 has provided the integrated circuit of the voltage monitor described in the present embodiment, and that wherein Fig. 2 discloses is signal processing circuit partial circuit figure in Fig. 1.Electrical connection between two parts as shown in Figure 1.
Voltage monitor described in the present embodiment comprises signal processing circuit, data wireless transport module and direct current voltage sensor.In signal processing circuit, be provided with end of incoming cables 2 and leading-out terminal 1, voltage conversion device 3, dual inline type row's pin 4 and low difference voltage regulator 5.Wherein the distance between two dual inline type row pins 4 keeps immobilizing.
On direct current voltage sensor, comprise 12 binding posts (shown in Fig. 1).
Leading-out terminal 1 in signal processing circuit connects No. 5 and No. 6 binding posts of direct current voltage sensor by wire, for it provides 5v direct-current working volts.11 of direct current voltage sensor is connected with end of incoming cables 2 by wire and transmits signal to signal processing circuit with No. 12 binding posts.Signal processing circuit is connected with data wireless transport module by two dual inline type row pins 4, and signal after treatment is sent to outside host computer by data wireless transport module.
Described in the present embodiment, the principle of work of voltage monitor is as follows: direct current voltage sensor is positioned over to subway the 3rd rail interval place, signal processing circuit gathers according to predefined collection period the magnitude of voltage that direct current voltage sensor detects, then this magnitude of voltage is sent to outside host computer by data wireless transport module, during this time, signal processing circuit provides operating voltage to direct current voltage sensor and data wireless transport module respectively.
Obviously, by the clock frequency of setting signal treatment circuit suitably, can control signal treatment circuit gather the time cycle of voltage, this regulative mode is continuable.
Can also one A/D modular converter be set at data wireless transport module, thereby can carry out analog to digital conversion being transferred to the magnitude of voltage just signal processing circuit being collected before host computer.Data transmission can adopt any existing transmission mode simultaneously, for example, can adopt the wireless network based on ZigBee technology.
Equally, can in signal processing circuit, preset a threshold value, in the time that the magnitude of voltage of direct current voltage sensor output terminal exceedes this threshold value, directly externally report to the police.Type of alarm has a lot, and pilot lamp can be set in signal processing circuit, directly externally reports to the police, and also can warning device be set on host computer and report to the police.Not only can report to the police with pilot lamp, also can add hummer etc., realize sound and light alarm.
The present invention can also make some other equivalence and change on the basis of above design, for example, screw can be set in signal processing circuit, is convenient to fixed signal treatment circuit; Also can be by direct current voltage sensor ground connection, avoid under direct current voltage sensor normal operation with high-tension defect, on-the-spot easy for installation.Within various minor alterations based on this type of and equivalent transformation all should be included in the scope described in claim.
Can implement the technology that the present invention describes by various means.For instance, these technology may be implemented in hardware, firmware, software or its combination.For hardware implementation scheme, processing module may be implemented in one or more special ICs (ASIC), digital signal processor (DSP), programmable logic device (PLD), on-the-spot Programmadle logic gate array (FPGA), processor, controller, microcontroller, electronic installation, other through design to carry out in the electronic unit or its combination of function described in the invention.
For firmware and/or implement software scheme, the module of available execution function described herein (for example, process, step, flow process etc.) is implemented described technology.Firmware and/or software code can be stored in storer and by processor and carry out.Storer may be implemented in processor or processor outside.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can complete by the relevant hardware of programmed instruction, aforesaid program can be stored in a computer read/write memory medium, this program, in the time carrying out, is carried out the step that comprises said method embodiment; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CDs.
Above-described embodiment is preferably embodiment of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under Spirit Essence of the present invention and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection scope of the present invention.
Claims (9)
1. underground railway track voltage monitor, it is characterized in that, comprise: signal processing circuit, data wireless transport module and direct current voltage sensor, above-mentioned signal processing circuit is connected by the dual inline type row pin in signal processing circuit with data wireless transport module, signal processing circuit is connected with end of incoming cables by the leading-out terminal of signal processing circuit with direct current voltage sensor, data wireless transport module and outside host computer wireless connections; Signal processing circuit comprise for 220v alternating current is converted to 5v direct current so that for direct current voltage sensor voltage conversion device, the dual inline type row pin of operating voltage is provided, for DC voltage 5v being reduced to DC voltage 3.3v and then providing the low difference voltage regulator of working power for data wireless transport module.
2. underground railway track voltage monitor according to claim 1, is characterized in that, described signal processing circuit is connected by two dual inline type row pins with data wireless transport module, and has fixing gap between two dual inline type row pins.
3. underground railway track voltage monitor according to claim 1, is characterized in that, in described signal processing circuit, screw is set.
4. underground railway track voltage monitor according to claim 1, is characterized in that, described direct current voltage sensor guide rail solid ground.
5. underground railway track voltage monitor according to claim 1, is characterized in that, described data wireless transport module arranges an A/D modular converter, carries out analog to digital conversion for the magnitude of voltage that signal processing circuit is collected.
6. underground railway track voltage monitor according to claim 1, is characterized in that, in described signal processing circuit, is provided with pilot lamp.
7. the monitoring method of the underground railway track voltage monitor based on described in claim 1-6 any one, it is characterized in that, direct current voltage sensor is positioned over to subway the 3rd rail interval place, signal processing circuit gathers according to predefined collection period the magnitude of voltage that direct current voltage sensor detects, then this magnitude of voltage is sent to outside host computer by data wireless transport module, during this time, signal processing circuit provides operating voltage to direct current voltage sensor and data wireless transport module respectively.
8. monitoring method according to claim 7, is characterized in that, it is the wireless network adopting based on ZigBee technology that described data wireless transport module carries out data transmission.
9. monitoring method according to claim 7, is characterized in that, a default threshold value in signal processing circuit, in the time that the magnitude of voltage of direct current voltage sensor output terminal exceedes this threshold value, directly externally reports to the police.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410076841.0A CN103884898A (en) | 2014-03-04 | 2014-03-04 | Device and method for monitoring voltages of metro track |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410076841.0A CN103884898A (en) | 2014-03-04 | 2014-03-04 | Device and method for monitoring voltages of metro track |
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| US20060162772A1 (en) * | 2005-01-18 | 2006-07-27 | Presher Gordon E Jr | System and method for monitoring photovoltaic power generation systems |
| CN201247401Y (en) * | 2008-08-25 | 2009-05-27 | 中国矿业大学 | Apparatus for collecting and processing signal of subway stray current optical fiber sensing system |
| CN101701976A (en) * | 2009-06-15 | 2010-05-05 | 中铁电气化局集团有限公司 | Third rail detection device and method |
| CN201477141U (en) * | 2009-07-16 | 2010-05-19 | 深圳市华力特电气股份有限公司 | Stray current sensor with data processing function |
| CN202548196U (en) * | 2011-12-14 | 2012-11-21 | 镇江大全赛雪龙牵引电气有限公司 | DC traction power supply rail live-line detection device |
| CN103258413A (en) * | 2013-04-15 | 2013-08-21 | 暨南大学 | Wireless monitoring system and method of metro third rail remaining voltage |
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2014
- 2014-03-04 CN CN201410076841.0A patent/CN103884898A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060162772A1 (en) * | 2005-01-18 | 2006-07-27 | Presher Gordon E Jr | System and method for monitoring photovoltaic power generation systems |
| CN201247401Y (en) * | 2008-08-25 | 2009-05-27 | 中国矿业大学 | Apparatus for collecting and processing signal of subway stray current optical fiber sensing system |
| CN101701976A (en) * | 2009-06-15 | 2010-05-05 | 中铁电气化局集团有限公司 | Third rail detection device and method |
| CN201477141U (en) * | 2009-07-16 | 2010-05-19 | 深圳市华力特电气股份有限公司 | Stray current sensor with data processing function |
| CN202548196U (en) * | 2011-12-14 | 2012-11-21 | 镇江大全赛雪龙牵引电气有限公司 | DC traction power supply rail live-line detection device |
| CN103258413A (en) * | 2013-04-15 | 2013-08-21 | 暨南大学 | Wireless monitoring system and method of metro third rail remaining voltage |
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Application publication date: 20140625 |
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