CN204258840U - A kind of isolating and protecting device - Google Patents
A kind of isolating and protecting device Download PDFInfo
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- CN204258840U CN204258840U CN201420744748.8U CN201420744748U CN204258840U CN 204258840 U CN204258840 U CN 204258840U CN 201420744748 U CN201420744748 U CN 201420744748U CN 204258840 U CN204258840 U CN 204258840U
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Abstract
The utility model discloses a kind of isolating and protecting device; comprise: CAN interface, input/outgoing interface and the signal transmission passage be arranged between described CAN interface and input/outgoing interface, described signal transmission passage is disposed with: the filter unit of the high-frequency interferencing signal in signal described in the filter coil of the low-frequency interference signal in filtered signal, filtering, the CAN transceiver module that described signal is received and sent and the optical signal prosessing module of described signal being carried out to light-coupled isolation.The utility model carries out filtering by filter coil and filter unit to the low-and high-frequency interference signal in described signal; by optical signal prosessing module, light-coupled isolation is carried out to described signal; can effectively isolate various electromagnetic interference, protect bus and the product that is connected in bus and equipment.
Description
Technical field
The utility model relates to technical field of electronic communication, particularly relates to a kind of isolating and protecting device.
Background technology
In current automotive field, on vehicle electronics product, the application of CAN gets more and more.For ensureing the safety in running car, will carry out various test to vehicle electronics product, wherein the test of electromagnetic compatibility is particularly important.And in electromagnetic compatibility anti-interference test, the interference that interference source produces can affect bus transfer data and even damage bus.Therefore, provide a kind of isolating and protecting device to protect bus and to be connected to the product of bus and equipment, isolated various electromagnetic interference signal are necessary.
Utility model content
The purpose of this utility model is to provide a kind of isolating and protecting device, its object is to solve in existing vehicle electronics product EMC test lack the problem of bus being carried out to insulation blocking.
For solving the problems of the technologies described above, the utility model provides a kind of isolating and protecting device, comprising:
CAN interface, input/outgoing interface and the signal transmission passage be arranged between described CAN interface and input/outgoing interface, described signal transmission passage is disposed with: the filter unit of the high-frequency interferencing signal in signal described in the filter coil of the low-frequency interference signal in filtered signal, filtering, the CAN transceiver module receiving and send described signal and the optical signal prosessing module of described signal being carried out to light-coupled isolation.
Alternatively, describedly to the optical signal prosessing module that described signal carries out light-coupled isolation be:
Receive the bus signals of described CAN transceiver module input, after described bus signals is converted to light signal, send to the optical signal prosessing module of described input/outgoing interface; Or after the light signal of described input/outgoing interface input is converted to bus signals, send to the optical signal prosessing module of described CAN transceiver module.
Alternatively, also comprise:
Between described CAN interface and described filter coil, prevent electrostatic impact and surge from causing the electrostatic protection module of damage to bus.
Alternatively, also comprise:
Filter coil in described signal transmission passage and between filter unit, coupling has the terminal match selection control module of the product of different terminals type.
Alternatively, also comprise:
Be connected with described terminal match selection control module, for user provides the terminal match selection switch of the selectable terminal matched with demand.
Alternatively, also comprise:
To the power management module that described isolating and protecting device is powered.
Alternatively, described power management module comprises:
To the power supply that described isolating and protecting device is powered;
The power work indicator light of the charge condition of described power supply is shown to user.
Alternatively, also comprise:
Be connected with described CAN transceiver module, to the CAN type selecting switch that the type of the CAN connected is selected.
Alternatively, also comprise:
When breaking down in described signals transmission, open the relay indicating light preset indicator light and carry out reminding.
Alternatively, described input/outgoing interface is the Optical fiber plug matched with optical fiber.
Isolating and protecting device provided by the utility model; the signal transmission passage comprising CAN interface, input/outgoing interface and be arranged between described CAN interface and input/outgoing interface, the CAN transceiver module described signal transmission passage is disposed with the filter unit of the high-frequency interferencing signal in signal described in the filter coil of the low-frequency interference signal in filtered signal, filtering, described signal being received and sent and the optical signal prosessing module of described signal being carried out to light-coupled isolation.The utility model carries out filtering by filter coil and filter unit to the low-and high-frequency interference signal in described signal; by optical signal prosessing module, light-coupled isolation is carried out to described signal; can effectively isolate various electromagnetic interference, protect bus and the product that is connected in bus and equipment.
Accompanying drawing explanation
The structured flowchart of a kind of embodiment of the isolating and protecting device that Fig. 1 provides for the utility model;
The structured flowchart of the another kind of embodiment of the isolating and protecting device that Fig. 2 provides for the utility model.
Embodiment
In order to make those skilled in the art person understand the utility model scheme better, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.Obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
As shown in Figure 1, this device comprises the structured flowchart of a kind of embodiment of the isolating and protecting device that the utility model provides:
CAN interface 01, input/outgoing interface 02 and the signal transmission passage be arranged between described CAN interface and input/outgoing interface, described signal transmission passage is disposed with: the filter unit 04 of the high-frequency interferencing signal in signal described in the filter coil 03 of the low-frequency interference signal in filtered signal, filtering, the CAN transceiver module 05 receiving and send described signal and the optical signal prosessing module 06 of described signal being carried out to light-coupled isolation.
The utility model carries out filtering by filter coil and filter unit to the low-and high-frequency interference signal in described signal; by optical signal prosessing module, light-coupled isolation is carried out to described signal; can effectively isolate various electromagnetic interference, protect bus and the product that is connected in bus and equipment.
As shown in Figure 2, this device comprises the structured flowchart of the another kind of embodiment of isolating and protecting device provided by the utility model:
CAN interface 01, input/outgoing interface 02 and the signal transmission passage be arranged between described CAN interface and input/outgoing interface, described signal transmission passage is disposed with: electrostatic protection module 07, filter coil 03, terminal match selection control module 08, terminal match selection switch 09, filter unit 04, CAN transceiver module 05, CAN type selecting switch 10, optical signal prosessing module 06 and relay indicating light 11.
Wherein, CAN interface 01, for inputing or outputing the signal transmitted in described signal transmission passage;
Electrostatic protection module 07, causes damage for preventing electrostatic impact and surge to bus;
Filter coil 03, for the low-frequency interference signal in filtered signal;
Terminal match selection control module 08, for mating the product with different terminals type; Terminal match selection switch 09, is connected with described terminal match selection control module 08, for providing the selectable terminal matched with demand for user;
Filter unit 04, for the high-frequency interferencing signal in signal described in filtering;
CAN transceiver module 05, for receiving described signal and send; CAN type selecting switch 10, is connected with described CAN transceiver module, for selecting the type of the CAN connected, has Intelligent Matching height low speed, fault-tolerant CAN type of functionality, and has the two-way function receiving and send;
Optical signal prosessing module 06, for carrying out light-coupled isolation to described signal;
Relay indicating light 11, during for breaking down in described signals transmission, opening default indicator light and reminding;
Input/outgoing interface 02, for inputing or outputing the signal transmitted in described signal transmission passage, specifically can adopt the optical fiber input/outgoing interface be connected with optical fiber.
The isolating and protecting device that the present embodiment provides is matching used, when the output of tested products bus places this device, for the protection of product bus, fidelity bus signals; When the bus input end of monitoring equipment places this device, for reducing the signal be disturbed of coming through Optical Fiber Transmission.
When this isolating and protecting device is used for the output end of main of tested products; electrostatic protection module 07 receives the data from tested products accessed from CAN interface 01; coil 03 filters low-frequency interference signal after filtering; through the terminal matched with it; filter high-frequency interferencing signal by filter unit 04 again, input in CAN transceiver module 05.Optical signal prosessing module 06 receives the signal exported from CAN transceiver module 05, through signal transacting, then by light-coupled isolation device, is exported by optical fiber output interface.When output circuit has fault, relay indicating light 11 is lighted.
When the bus input end of this isolating and protecting device for monitoring equipment in testing, optical signal prosessing module 06 receives the signal inputted by optical fiber input interface, by light-coupled isolation device, then through signal transacting, exports to CAN transceiver module.CAN transceiver module receives from the digital signal after optical signal prosessing resume module, after a series of filtering and terminal coupling, exports electrostatic protection module to, finally exports checkout equipment to.When output circuit has fault, relay indicating light 11 is lighted.
Visible, the optical signal prosessing module in the utility model has the two-way function receiving and send, and CAN signal can either be converted to light signal so that Optical Fiber Transmission, also the light signal received from optical fiber can be converted to CAN signal.
Further, this device also comprises the power management module 12 of powering to described isolating and protecting device.
This power management module 12 comprises: the power work indicator light of the power supply of power to described isolating and protecting device and charge condition from described power supply to user that show.When power work indicator light shown in green and normal bright time, represent that battery electric quantity is sufficient, if relay indicating light be shown as yellow and normal bright time, represent that battery electric quantity is not enough, need to charge in time.When battery is in charged state, relay indicating light glimmers in whole charging process.
The utility model carries out filtering by filter coil and filter unit to the low-and high-frequency interference signal in described signal; by optical signal prosessing module, light-coupled isolation is carried out to described signal; can effectively isolate various electromagnetic interference; protection bus is not damaged in test of electromagnetic disturbance; ensure that the signal that bus is transmitted can effectively be reduced in test of electromagnetic disturbance, improve its signal to noise ratio.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiment, between each embodiment same or similar part mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the utility model.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from spirit or scope of the present utility model, can realize in other embodiments.Therefore, the utility model can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. an isolating and protecting device, is characterized in that, comprising:
CAN interface, input/outgoing interface and the signal transmission passage be arranged between described CAN interface and input/outgoing interface, described signal transmission passage is disposed with: the filter unit of the high-frequency interferencing signal in signal described in the filter coil of the low-frequency interference signal in filtered signal, filtering, the CAN transceiver module receiving and send described signal and the optical signal prosessing module of described signal being carried out to light-coupled isolation.
2. isolating and protecting device as claimed in claim 1, is characterized in that, describedly to the optical signal prosessing module that described signal carries out light-coupled isolation is:
Receive the bus signals of described CAN transceiver module input, after described bus signals is converted to light signal, send to the optical signal prosessing module of described input/outgoing interface; Or after the light signal of described input/outgoing interface input is converted to bus signals, send to the optical signal prosessing module of described CAN transceiver module.
3. isolating and protecting device as claimed in claim 1, is characterized in that, also comprise:
Between described CAN interface and described filter coil, prevent electrostatic impact and surge from causing the electrostatic protection module of damage to bus.
4. isolating and protecting device as claimed in claim 1, is characterized in that, also comprise:
Filter coil in described signal transmission passage and between filter unit, coupling has the terminal match selection control module of the product of different terminals type.
5. isolating and protecting device as claimed in claim 4, is characterized in that, also comprise:
Be connected with described terminal match selection control module, for user provides the terminal match selection switch of the selectable terminal matched with demand.
6. isolating and protecting device as claimed in claim 1, is characterized in that, also comprise:
To the power management module that described isolating and protecting device is powered.
7. isolating and protecting device as claimed in claim 6, it is characterized in that, described power management module comprises:
To the power supply that described isolating and protecting device is powered;
The power work indicator light of the charge condition of described power supply is shown to user.
8. isolating and protecting device as claimed in claim 1, is characterized in that, also comprise:
Be connected with described CAN transceiver module, to the CAN type selecting switch that the type of the CAN connected is selected.
9. isolating and protecting device as claimed in claim 1, is characterized in that, also comprise:
When breaking down in described signals transmission, open the relay indicating light preset indicator light and carry out reminding.
10. isolating and protecting device as claimed in claim 1, it is characterized in that, described input/outgoing interface is the Optical fiber plug matched with optical fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420744748.8U CN204258840U (en) | 2014-12-01 | 2014-12-01 | A kind of isolating and protecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420744748.8U CN204258840U (en) | 2014-12-01 | 2014-12-01 | A kind of isolating and protecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204258840U true CN204258840U (en) | 2015-04-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420744748.8U Active CN204258840U (en) | 2014-12-01 | 2014-12-01 | A kind of isolating and protecting device |
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| Country | Link |
|---|---|
| CN (1) | CN204258840U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113726626A (en) * | 2021-08-31 | 2021-11-30 | 天津津航计算技术研究所 | Filter protection circuit based on CAN bus driver chip |
-
2014
- 2014-12-01 CN CN201420744748.8U patent/CN204258840U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113726626A (en) * | 2021-08-31 | 2021-11-30 | 天津津航计算技术研究所 | Filter protection circuit based on CAN bus driver chip |
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