CN201941601U - Speed signal photoelectric isolating circuit of vehicle-mounted equipment - Google Patents
Speed signal photoelectric isolating circuit of vehicle-mounted equipment Download PDFInfo
- Publication number
- CN201941601U CN201941601U CN201020682364XU CN201020682364U CN201941601U CN 201941601 U CN201941601 U CN 201941601U CN 201020682364X U CN201020682364X U CN 201020682364XU CN 201020682364 U CN201020682364 U CN 201020682364U CN 201941601 U CN201941601 U CN 201941601U
- Authority
- CN
- China
- Prior art keywords
- power supply
- circuit
- speed
- isolation
- level
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model relates to a speed signal photoelectric isolating circuit of vehicle-mounted equipment. Electrical isolation between speed input and output channels and a power supply is adopted for realizing photoelectric isolation between a speed sensing channel and the power supply, so as to prevent the speed input channel of the vehicle-mounted equipment from directly facing surge voltage with a greater peak value, thereby achieving the purpose of stable and reliable operation. The isolating circuit comprises two groups of speed sensing circuits which do not share the power supply and have isolated signals, and two groups of power supply circuits, wherein each group of speed sensing circuits comprises a speed sensor, a speed input interface, primary photoelectric signal isolation and secondary photoelectric signal isolation, a surge protection device is connected between the speed input interface and the primary photoelectric signal isolation, each group of power supply circuits comprises a 100V-to-15V primary power supply and a 15V-to-15V secondary power supply, the primary power supply supplies power for the speed sensing circuits through the secondary photoelectric signal isolation, and the secondary power supply supplies power for the speed sensing circuits through the primary photoelectric signal isolation.
Description
Technical field
The utility model relates to a kind of mobile unit speed signal photoelectric isolating circuit that is used for guideway vehicle, belongs to track traffic and Electrical Control Technology field.
Background technology
At present the domestic guideway vehicle speed per hour that runs on main line railway reached 380 kilometers and more than, thereby more strict design and in-use performance requirement have been proposed for vehicle power and control system.
The vehicle electric control system generally can be subjected to the influence of high voltage surge or electromagnetic interference, and for example string speed appears in speed sensor because disturb, speed is lost even the accident of scaling loss.Even more serious is, speed sensor can with car down with car between the high voltage surge of formation conduct to the inside of mobile unit, thereby cause mobile unit by scaling loss.
The means that prior art solves this type of problem are to improve the corresponding insulation voltage withstand class by the manufacturer of speed sensor, as waiting antijamming feature in sensor internal increase shielding.And, between car body and bogie truck, set up surge by mobile unit manufacturer and suppress absorption plant.
Prior art solution party lacks the surge anti-interference means of secondary side (15V) to mainly being to consider that how system's primary side (100V) being carried out the surge anti-interference improves, and tracing it to its cause is that acquisition of signal is not realized separating with feed circuit fully.
In view of this, the special present patent application that proposes.
The utility model content
Mobile unit speed signal photoelectric isolating circuit described in the utility model, its purpose is to solve the problem that above-mentioned prior art exists and takes electrical isolation between speed input, delivery channel and the power supply, isolate to realize the photoelectricity between velocity pick-up passage and the power supply, the speed input channel of avoiding mobile unit reaches purpose stable, reliability service directly in the face of the surge voltage of big peak value.
For realizing above-mentioned design goal, described mobile unit speed signal photoelectric isolating circuit mainly includes:
2 groups of velocity pick-up circuit of common source, Signal Spacing not, and 2 groups of feed circuit.Wherein,
Every group of velocity pick-up circuit includes bonded assembly speed sensor, speed input interface, the isolation of one-level photosignal and secondary light electric signal isolation successively, is connected with surge protector between speed input interface and the isolation of one-level photosignal;
Every group of feed circuit, including 100V changes the secondary power supply of the level power supply of 15V, 15V commentaries on classics 15V;
To the velocity pick-up circuit supply, isolate to the velocity pick-up circuit supply by the one-level photosignal by secondary power supply by the secondary light electric signal isolation for one level power supply.
As above-mentioned basic scheme feature, the speed signal photoelectric isolating circuit adopts the isolation of two-stage photosignal, two-stage power supply signal to isolate respectively.
Every group of velocity pick-up circuit powered respectively, physical insulation.If wherein one group of velocity pick-up circuit damages, do not influence the power supply and the signal transmission of another group velocity pick-up circuit.
And, if the surge voltage wherein on one group of velocity pick-up circuit also non-conducting to another group velocity pick-up circuit, thereby improve the reliability of bulk velocity flashlight electric isolating circuit transmission signals effectively.
For correspondingly improving the ability to bear of surge voltage, can between the surge protector of 2 groups of velocity pick-up circuit, a file protect test interface be set.
Export the voltage endurance capability that photosignal is isolated to for improving feed circuit further, can be respectively arranged with power filter and insurance at the power input of every group of feed circuit.
As mentioned above, the advantage that the utility model mobile unit speed signal photoelectric isolating circuit has is, realize electrical isolation completely between input, delivery channel and the power supply of speed transmission, can realize the photoelectricity isolation between sensing passage and the power supply, thereby can avoid signal input channel directly in the face of surge voltage than big peak value.Mobile unit can be in strong, complicated electromagnetic interference environment, stable, operation reliably.
Description of drawings
Now the utility model is described further in conjunction with following accompanying drawing;
Fig. 1 is the scheme drawing of speed signal photoelectric isolating circuit;
The specific embodiment
Embodiment 1, and as shown in Figure 1, described mobile unit speed signal photoelectric isolating circuit mainly includes:
2 groups of velocity pick-up circuit of common source, Signal Spacing not, and 2 groups of feed circuit;
Every group of velocity pick-up circuit includes bonded assembly speed sensor, speed input interface, the isolation of one-level photosignal and secondary light electric signal isolation successively, is connected with surge protector between speed input interface and the isolation of one-level photosignal; Between the surge protector of 2 groups of velocity pick-up circuit, a file protect test interface is set.
Every group of feed circuit, including 100V changes the secondary power supply of the level power supply of 15V, 15V commentaries on classics 15V;
To the velocity pick-up circuit supply, isolate to the velocity pick-up circuit supply by the one-level photosignal by secondary power supply by the secondary light electric signal isolation for one level power supply.
At the power input of every group of feed circuit, be respectively arranged with power filter and insurance.
Mobile unit speed signal photoelectric isolating circuit externally adopts the aviation adaptor union interface structure of contact pin, and is provided with power light.
In the one-level photosignal was isolated, input circuit did not suppress the common mode surge voltage, but protected by strengthening the ground insulation distance, so that still can normal operation after surge protector lost efficacy.
In the secondary light electric signal isolation,, can use the diode pair optocoupler to realize reverse-voltage protection by a level power supply (100V/15V) power supply.In this level was isolated, surge voltage can be done too much protection again by filtering fully.
Isolate through above-mentioned two-stage photoelectricity, can guarantee more than the withstand voltage 5000V of reaching between speed signal input, the delivery channel.
Claims (3)
1. mobile unit speed signal photoelectric isolating circuit is characterized in that: include 2 groups of not velocity pick-up circuit of common source, Signal Spacing, and 2 groups of feed circuit;
Every group of velocity pick-up circuit includes bonded assembly speed sensor, speed input interface, the isolation of one-level photosignal and secondary light electric signal isolation successively, is connected with surge protector between speed input interface and the isolation of one-level photosignal;
Every group of feed circuit, including 100V changes the secondary power supply of the level power supply of 15V, 15V commentaries on classics 15V;
To the velocity pick-up circuit supply, isolate to the velocity pick-up circuit supply by the one-level photosignal by secondary power supply by the secondary light electric signal isolation for one level power supply.
2. mobile unit speed signal photoelectric isolating circuit according to claim 1 is characterized in that: between the surge protector of 2 groups of velocity pick-up circuit, a file protect test interface is set.
3. mobile unit speed signal photoelectric isolating circuit according to claim 1 and 2 is characterized in that: at the power input of every group of feed circuit, be respectively arranged with power filter and insurance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020682364XU CN201941601U (en) | 2010-12-27 | 2010-12-27 | Speed signal photoelectric isolating circuit of vehicle-mounted equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020682364XU CN201941601U (en) | 2010-12-27 | 2010-12-27 | Speed signal photoelectric isolating circuit of vehicle-mounted equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201941601U true CN201941601U (en) | 2011-08-24 |
Family
ID=44468951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020682364XU Expired - Lifetime CN201941601U (en) | 2010-12-27 | 2010-12-27 | Speed signal photoelectric isolating circuit of vehicle-mounted equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201941601U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112526200A (en) * | 2020-11-11 | 2021-03-19 | 西安爱科赛博电气股份有限公司 | High-precision high-dynamic isolation type voltage transmitter |
-
2010
- 2010-12-27 CN CN201020682364XU patent/CN201941601U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112526200A (en) * | 2020-11-11 | 2021-03-19 | 西安爱科赛博电气股份有限公司 | High-precision high-dynamic isolation type voltage transmitter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103231700B (en) | Anti-slide valve power supply control circuit of high speed train | |
| CN201518044U (en) | Remote monitoring and recording unit of power supply lightning protection box | |
| CN204801681U (en) | Novel explosion -proof vehicle | |
| CN203299319U (en) | Locomotive insulation detection device | |
| CN201941601U (en) | Speed signal photoelectric isolating circuit of vehicle-mounted equipment | |
| CN102879632A (en) | Solar wireless lightning stroke discharge counter | |
| CN203535635U (en) | RS232 communication circuit | |
| US9678238B2 (en) | Intelligent train wheel sensor | |
| CN202649276U (en) | Digitalized fiber voltage transformer | |
| CN103507658B (en) | Battery-driven car and bus control system thereof | |
| CN209590123U (en) | Metro Stray Current Monitoring device | |
| CN104118334B (en) | Air wire auto switching electric system | |
| CN202499144U (en) | Mining locomotive control and measurement protecting device based on CAN bus | |
| CN201732943U (en) | TVS tube lightning-protection connector | |
| CN101504793B (en) | Protection method for remote meter reading system and electronic protection device | |
| CN104660244A (en) | Network interface and ESD protection component circuit | |
| CN202231469U (en) | Charging connector for intelligent vehicle-mounted terminal | |
| CN202309054U (en) | Automobile anti-interference circuit | |
| CN204567669U (en) | The subway shield door Equipotential connection device of a kind of selectivity deciliter | |
| CN202663165U (en) | Adapting connection device used during charging of intelligent vehicle-mounted terminal | |
| CN204304421U (en) | The protective circuit of underground coal mine RS485 communication line | |
| CN209634313U (en) | A kind of intelligent track-traffic charging switching device | |
| CN211125109U (en) | Waterproof low-voltage cable | |
| CN104044595A (en) | Underground new energy locomotive for mine | |
| CN207028869U (en) | Protection circuit, communication interface, charging equipment, electric charging station and electric automobile, movable charging vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: Chengyang District of Shandong city of Qingdao province Jinhong road 266111 No. 88 Patentee after: CRRC QINGDAO SIFANG CO., LTD. Address before: Jihongtan town Chengyang District Shandong city Qingdao province Jinhong road 266111 No. 88 Patentee before: CSR Qingdao Sifang Locomotive and Rolling Stock Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20110824 |
|
| CX01 | Expiry of patent term |