CN202421333U - Phase tester of 25 Hz phase-sensitive track circuit - Google Patents
Phase tester of 25 Hz phase-sensitive track circuit Download PDFInfo
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- CN202421333U CN202421333U CN 201120382210 CN201120382210U CN202421333U CN 202421333 U CN202421333 U CN 202421333U CN 201120382210 CN201120382210 CN 201120382210 CN 201120382210 U CN201120382210 U CN 201120382210U CN 202421333 U CN202421333 U CN 202421333U
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Abstract
The utility model provides a phase tester of a 25 Hz phase-sensitive track circuit, which is used for testing the time difference of the zero-crossing moments of two sine waves and indirectly testing the phase difference of the two sine waves. The phase tester of a 25 Hz phase-sensitive track circuit comprises two signal shaping circuits, an XOR gate circuit, an analog to digital conversion circuit, a central processor and a display module. The output terminal of the two signal shaping circuits is connected to the input terminal of the XOR gate circuit; the output terminal of the XOR gate circuit is connected to the analog to digital conversion circuit, and a simulation signal is conversed to a digital signal; the output terminal of the analog to digital conversion circuit is connected to the central processor; the central processor is also connected to the display module; a pulse width is conversed to the phase difference; and the tested phase difference result is output to the display module. According to the utility model, the test circuit for testing the phase difference of two sine waves is simplified employing a digitlization technology, the cost of the test circuit is reduced, and the real-time performance and measure precision of the test result are raised. The interference of the test circuit to a tested signal is minimized by employing a photoelectric isolating technology, and the anti-interference capability of a one-chip microcomputer is enhanced.
Description
Technical field
The utility model belongs to track traffic information engineering and control field, particularly a kind of phase test appearance of 25Hz phase-sensitive track circuits.
Background technology
Railway 25Hz phase-sensitive track circuits are used for electric railway in a large number at present; The duty that its phase differential departs from for track circuit has very big influence; The artificial periodic measurement that adopts at present, the duty of track circuit is judged in dependence people's judgement, workman's subjectivity is bigger.
And prior art can not be monitored the duty of track circuit in real time, and workload is big and operation is very loaded down with trivial details, and loaded down with trivial details operation has caused measuring error big and cost is high.Be unfavorable for the accuracy and automatic voltinism of electric circuit inspection like this, wasted a lot of human resources.
Still there is not a kind of tester that can monitor track circuit in real time in the prior art.
The utility model content
The technical matters that the utility model solved is to provide the phase test appearance of the 25Hz phase-sensitive track circuits that a kind of circuit is simple, cost performance is high, antijamming capability is strong, easy to use.
The technical solution that realizes the utility model purpose is: a kind of phase test appearance of 25Hz phase-sensitive track circuits; Comprise two signal transformation circuits, NOR gate circuit, analog to digital conversion circuit, central processing unit and display modules; The output terminal of said two signal transformation circuits is connected with the input end of NOR gate circuit; Obtain the signal square pulse that pulse width is directly proportional with phase differential, the output terminal of NOR gate circuit is connected with analog to digital conversion circuit, is digital signal with analog signal conversion; The output terminal of analog to digital conversion circuit is connected with central processing unit; This central processing unit also is connected with display module, and pulse width is scaled phase differential, and the phase differential result of test is exported on display module.
Particularly; This tester comprises first resistance, second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, two chip LM339, chip CD4047 and photoelectrical coupler OPTPISO1; Its intermediate head place extension line was connected another input end grounding of this chip after said first resistance, second resistance were connected each other with the input end of the first chip LM339; Its intermediate head place extension line was connected another input end grounding of this chip after the 3rd resistance, the 4th resistance were connected each other with the input end of the second chip LM339; The other end of said first resistance, second resistance, the 3rd resistance, the 4th resistance is respectively four signal input parts; The output terminal of two chip LM339 is connected with two input ends of chip CD4047; The output terminal of chip CD4047 is connected with photoelectrical coupler OPTPISO1 through the 5th resistance; The output terminal of this photoelectrical coupler OPTPISO1 is connected with central processing unit; This central processing unit is connected with digital display screen, and the result outputs on the digital display screen with phase differential.
The principle of the utility model is: the utility model obtains square-wave signal through shaping is carried out in the two-way measured signal; Two paths of signals is carried out XOR to be handled; The dutycycle and the measured signal phase differential of output signal are linear; Because signal frequency is fixed, can through to signal pulse width to measure phase of input signals poor.
The utility model compared with prior art, its remarkable advantage is: 1) the utility model adopts digitizing technique, has simplified metering circuit, has improved measuring accuracy; 2) the utility model adopts photoelectric isolation technology, is short-circuited at test circuit, can tested track circuit not be exerted an influence during fault such as open circuit, guarantees can not produce the operate as normal of tested track circuit harmful effect; 3) the utility model has reduced manual measurement work, makes the surveying work robotization carry out, and has improved measured real-time property, can realize remote measurement; 4) this measurement phase differential result of having increased test exceeds indication range and then produces warning function, and in time discovering device hidden danger reduces the generation of equipment failure.
Below in conjunction with accompanying drawing the utility model is described in further detail.
Description of drawings
Fig. 1 is the phase test instrument circuit figure of the 25Hz phase-sensitive track circuits of the utility model.
Fig. 2 is the oscillogram of the 25Hz phase-sensitive track circuits of the utility model.
Fig. 3 is the square pulse signal of the 25Hz phase-sensitive track circuits of the utility model.
Embodiment
In conjunction with Fig. 1, the utility model discloses a kind of phase test appearance of testing railway signal foundation equipment-----25Hz phase-sensitive track circuits with digitizing technique.The phase test appearance of the 25Hz phase-sensitive track circuits of the utility model, it is to handle the two-way input signal respectively by two-way measured signal shaping circuit, and obtains the signal square pulse that pulse width is directly proportional with phase differential through the processing of a NOR gate circuit.The square pulse signal changes digital signal into through analog-to-digital conversion module, accomplishes the conversion of simulating signal to digital signal.Digital signal is scaled phase differential through the processing of single-chip microcomputer with pulse width, and the result of phase differential is presented on the digital display screen, then produces warning when the phase differential result of test exceeds indication range.Particularly; The phase test appearance of the 25Hz phase-sensitive track circuits of the utility model; Comprise two signal transformation circuits, NOR gate circuit, analog to digital conversion circuit, central processing unit and display modules, the output terminal of said two signal transformation circuits is connected with the input end of NOR gate circuit, obtains the signal square pulse that pulse width is directly proportional with phase differential; The output terminal of NOR gate circuit is connected with analog to digital conversion circuit; With analog signal conversion is digital signal, and the output terminal of analog to digital conversion circuit is connected with central processing unit, and this central processing unit also is connected with display module; Pulse width is scaled phase differential, and the phase differential result of test is exported on display module.
See from circuit module; This tester comprises first resistance R 1, second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, two chip LM339, chip CD4047 and photoelectrical coupler OPTPISO1; Said first resistance R 1, second resistance R 2 its intermediate head place extension lines of series connection back each other are connected another input end grounding of this chip with the input end of the first chip LM339; The 3rd resistance R 3, the 4th resistance R 4 its intermediate head place extension lines of series connection back each other are connected another input end grounding of this chip with the input end of the second chip LM339; The other end of said first resistance R 1, second resistance R 2, the 3rd resistance R 3, the 4th resistance R 4 is respectively four signal input parts; The output terminal of two chip LM339 is connected with two input ends of chip CD4047; The output terminal of chip CD4047 is connected with photoelectrical coupler OPTPISO1 through the 5th resistance R 5; The output terminal of this photoelectrical coupler OPTPISO1 is connected with central processing unit; This central processing unit is connected with digital display screen, and the result outputs on the digital display screen with phase differential.The output terminal of photoelectrical coupler OPTPISO1 is connected with external power supply VCC1 through the 6th resistance R 6 with intermediate head place of central processing unit junction.
In conjunction with Fig. 1, Fig. 2, leading track power supply 90 degree of the 25Hz phase-sensitive track circuits of the utility model locally supplied power source under desirable duty.25Hz phase-sensitive track circuits locally supplied power source's zero passage under desirable duty constantly differs 10ms with track power supply zero passage constantly.In conjunction with Fig. 3, the dutycycle and the measured signal phase differential of output signal are linear because signal frequency fixes, admittedly can through to signal pulse width to measure phase of input signals poor.
Need measure the phase differential of track circuit locally supplied power source and track power supply in actual use; This tester is through the measure local power supply zero passage moment and track power supply zero passage mistiming constantly, the test of the phase differential that can accomplish track circuit locally supplied power source and track power supply through converting.
The phase test appearance workflow of the 25Hz phase-sensitive track circuits of the utility model is:
1) at first input signal is carried out step-down and handle, two resistance carry out dividing potential drop to input signal;
2) to the shaping of carrying out of input signal,, obtain a square-wave signal through the zero passage comparator circuit because input is sinusoidal;
3) two paths of signals obtains the pulse signal that pulse width is directly proportional with phase differential through the processing of a NOR gate circuit.The measurement of single-chip microcomputer through pulse-width just can convert and obtain phase differential, comes out through 1602 liquid crystal displays;
4) because the voltage ratio of local coil is higher,, Acquisition Circuit and single chip circuit are carried out light-coupled isolation, improve the antijamming capability of single-chip microcomputer for monolithic function reliable work.
By on can know that the utility model is to be square-wave signal by two-way measured signal shaping circuit with the just profound conversion of signals of two-way input, the two-way square-wave signal obtains the square pulse signal that pulse width is directly proportional with phase differential through the processing of a NOR gate circuit.Above-mentioned square pulse signal changes digital signal into through analog-to-digital conversion module; Measure the phase differential of two just profound ripples with digitizing technique; Digital signal is scaled phase differential through the processing of single-chip microcomputer with pulse width; The result of phase differential is presented on the digital display screen, then produces warning when the phase differential result who tests exceeds indication range.The utility model adopts digitizing technique, has simplified metering circuit, has improved measuring accuracy.
Claims (2)
1. the phase test appearance of 25Hz phase-sensitive track circuits; It is characterized in that; Comprise two signal transformation circuits, NOR gate circuit, analog to digital conversion circuit, central processing unit and display modules, the output terminal of said two signal transformation circuits is connected with the input end of NOR gate circuit, obtains the signal square pulse that pulse width is directly proportional with phase differential; The output terminal of NOR gate circuit is connected with analog to digital conversion circuit; With analog signal conversion is digital signal, and the output terminal of analog to digital conversion circuit is connected with central processing unit, and this central processing unit also is connected with display module; Pulse width is scaled phase differential, and the phase differential result of test is exported on display module.
2. the phase test appearance of 25Hz phase-sensitive track circuits according to claim 1; It is characterized in that; This tester comprises first resistance [R1], second resistance [R2], the 3rd resistance [R3], the 4th resistance [R4], the 5th resistance [R5], two chip LM339, chip CD4047 and photoelectrical coupler OPTPISO1; Said first resistance [R1], second resistance [R2] its intermediate head place extension line of series connection back each other are connected another input end grounding of this chip with the input end of the first chip LM339; The 3rd resistance [R3], the 4th resistance [R4] its intermediate head place extension line of series connection back each other are connected another input end grounding of this chip with the input end of the second chip LM339; The other end of said first resistance [R1], second resistance [R2], the 3rd resistance [R3], the 4th resistance [R4] is respectively four signal input parts; The output terminal of two chip LM339 is connected with two input ends of chip CD4047; The output terminal of chip CD4047 is connected with photoelectrical coupler OPTPISO1 through the 5th resistance [R5]; The output terminal of this photoelectrical coupler OPTPISO1 is connected with central processing unit; This central processing unit is connected with digital display screen, and the result outputs on the digital display screen with phase differential.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120382210 CN202421333U (en) | 2011-10-10 | 2011-10-10 | Phase tester of 25 Hz phase-sensitive track circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120382210 CN202421333U (en) | 2011-10-10 | 2011-10-10 | Phase tester of 25 Hz phase-sensitive track circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202421333U true CN202421333U (en) | 2012-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120382210 Expired - Fee Related CN202421333U (en) | 2011-10-10 | 2011-10-10 | Phase tester of 25 Hz phase-sensitive track circuit |
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| Country | Link |
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| CN (1) | CN202421333U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104007296A (en) * | 2014-06-11 | 2014-08-27 | 南京铁道职业技术学院 | Signal source for phase-sensitive track testing |
| CN104330630A (en) * | 2014-10-31 | 2015-02-04 | 许继电气股份有限公司 | High-accuracy analog quantity phase difference measuring method |
| CN104898041A (en) * | 2015-06-30 | 2015-09-09 | 绵阳市维博电子有限责任公司 | Phase-sensitive rail signal detecting method and system |
| CN109625038A (en) * | 2018-12-27 | 2019-04-16 | 合肥工大高科信息科技股份有限公司 | A kind of track circuit state identification system and method |
| CN109669071A (en) * | 2018-11-21 | 2019-04-23 | 绵阳市维博电子有限责任公司 | External power grid phase difference monitors sensor and external power grid phase monitor system |
| CN111856163A (en) * | 2020-07-10 | 2020-10-30 | 大连理工大学 | Non-contact single-rod asynchronous phase checking method |
| CN113281568A (en) * | 2021-07-21 | 2021-08-20 | 中国铁建电气化局集团有限公司 | Phase difference measuring system and measuring method for 25Hz phase-sensitive signals |
| CN117990982A (en) * | 2024-04-02 | 2024-05-07 | 成都金诺信高科技有限公司 | Same-frequency signal phase measuring circuit, chip and device based on trigger |
-
2011
- 2011-10-10 CN CN 201120382210 patent/CN202421333U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104007296A (en) * | 2014-06-11 | 2014-08-27 | 南京铁道职业技术学院 | Signal source for phase-sensitive track testing |
| CN104007296B (en) * | 2014-06-11 | 2017-05-10 | 南京铁道职业技术学院 | Signal source for phase-sensitive track testing |
| CN104330630A (en) * | 2014-10-31 | 2015-02-04 | 许继电气股份有限公司 | High-accuracy analog quantity phase difference measuring method |
| CN104898041A (en) * | 2015-06-30 | 2015-09-09 | 绵阳市维博电子有限责任公司 | Phase-sensitive rail signal detecting method and system |
| CN109669071A (en) * | 2018-11-21 | 2019-04-23 | 绵阳市维博电子有限责任公司 | External power grid phase difference monitors sensor and external power grid phase monitor system |
| CN109625038A (en) * | 2018-12-27 | 2019-04-16 | 合肥工大高科信息科技股份有限公司 | A kind of track circuit state identification system and method |
| CN111856163A (en) * | 2020-07-10 | 2020-10-30 | 大连理工大学 | Non-contact single-rod asynchronous phase checking method |
| CN111856163B (en) * | 2020-07-10 | 2021-05-07 | 大连理工大学 | Non-contact single-rod asynchronous phase checking method |
| CN113281568A (en) * | 2021-07-21 | 2021-08-20 | 中国铁建电气化局集团有限公司 | Phase difference measuring system and measuring method for 25Hz phase-sensitive signals |
| CN117990982A (en) * | 2024-04-02 | 2024-05-07 | 成都金诺信高科技有限公司 | Same-frequency signal phase measuring circuit, chip and device based on trigger |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120905 Termination date: 20141010 |
|
| EXPY | Termination of patent right or utility model |