CN203405730U - An apparatus for testing the physical layer of a CAN bus - Google Patents
An apparatus for testing the physical layer of a CAN bus Download PDFInfo
- Publication number
- CN203405730U CN203405730U CN201320454038.7U CN201320454038U CN203405730U CN 203405730 U CN203405730 U CN 203405730U CN 201320454038 U CN201320454038 U CN 201320454038U CN 203405730 U CN203405730 U CN 203405730U
- Authority
- CN
- China
- Prior art keywords
- switch
- bus
- resistance
- capacitor
- termination
- 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 - Fee Related
Links
Images
Landscapes
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The embodiment of the utility model provides an apparatus for testing the physical layer of a CAN bus. The apparatus comprises a tested controller bus load circuit, a fault input circuit, and a bus testing environment load circuit. The bus load circuit is used for controlling the terminal resistance of the bus and is connected with a filtering capacitor circuit. One end of the bus load circuit is connected with the CAN_H end of the CAN bus, while the other end of the bus load circuit is connected with the CAN_L end of the CAN bus. The fault input circuit is used for controlling fault input operation and is connected with the bus load circuit. The bus testing environment load circuit is used for controlling the resistance value, the capacitance value , input resistance value, and input capacitance value of the wire harness of the CAN bus. The bus testing environment load circuit is connected with the fault input circuit and effectively enhances convenience for testing the CAN bus.
Description
Technical field
The utility model relates to vehicle technology field, relates in particular to a kind of device of testing CAN bus Physical layer.
Background technology
Along with the widespread use of CAN bus on vehicle, the development process of CAN bus is refinement all the more also, wherein each stage test of CAN bus is also more and more subject to the attention of each main engine plants.In the middle of the component-level and system level testing of CAN bus, test environment build with the creation of various operating modes to be important ingredients, need to spend a large amount of energy of Test Engineer, and through whole test process.Particularly in exploitation in earlier stage, in the situation that other controller of bus does not have exemplar in kind, Test Engineer cannot create bus test environment by building electrical equipment stand, at this moment just need to simulate this test environment by some professional equipment, use these equipment to be CAE (Computer Aided Engineering, computer-aided engineering) exploitation needs special slip-stick artist team to spend a large amount of manpower and materials and the time realizes, but have many times and may only need to carry out simple confirmatory test to exemplar in early stage, obviously large-scale like this complication system there is no need completely for this demand, at this moment just need Test Engineer to develop some simple devices and meet such testing requirement.
Utility model content
In order to solve the problems of the technologies described above, embodiment of the present utility model has proposed a kind of device of testing CAN bus Physical layer, the convenient test to CAN bus.
According to an aspect of the present utility model, a kind of device of testing CAN bus Physical layer is provided, comprise: for the tested controller bus load circuit of control terminal resistance and filter-capacitor circuit, one end of described bus load circuit is connected with the CAN_H end of CAN bus, and the other end of described load circuit is connected with the CAN_L end of CAN bus; For controlling the fault injection circuit of fault implant operation, be connected with described bus load circuit; And for controlling CAN bus wire harness resistance value and capacitance, and the bus test environmental loads circuit of input resistance value and input capacitance value, be connected with described fault injection circuit.
Alternatively, described bus load circuit comprises: the first switch, the first resistance, the second resistance, second switch and the first capacitor, one end of wherein said the first switch is connected with the CAN_H end of CAN bus, one end of described the first resistance is connected with the other end of described the first switch, the other end of described the first resistance is connected with one end of described the first capacitor with one end of described the second resistance respectively, the other end ground connection of described the first capacitor, the other end of described the second resistance is connected with one end of described second switch, the other end of described second switch is connected with the CAN_L end of CAN bus.
Alternatively, described fault injection circuit comprises: the 3rd switch, the 4th switch, the 5th switch, the 6th switch, minion pass, the 8th switch, the 9th switch, the tenth switch, the 11 switch, twelvemo are closed and voltage source V 1 interface, the first end of wherein said the 3rd switch is connected with the CAN_H end of CAN bus, the second end of described the 3rd switch is connected with the first end that described minion is closed, and the 3rd end of described the 3rd switch is connected with one end of described the 9th switch;
One end of described the 4th switch is connected with the CAN_L end of CAN bus, and the second end of described the 4th switch is connected with one end of described the tenth switch, and the 3rd end of described the 4th switch is connected with one end of described the 8th switch;
One end of described the 5th switch is connected with the Vbat+ end of CAN bus, and the other end of described the 5th switch is connected with voltage source V CC;
One end of described the 6th switch is connected with the Vbat-end of CAN bus, and the other end of described the 6th switch is connected with the first end of described the 11 switch;
The second termination voltage source VCC that described minion is closed, the 3rd end ground connection that described minion is closed;
The second termination voltage source VCC of described the 8th switch, the 3rd end ground connection of described the 8th switch;
One end that described in another termination of described the 9th switch, twelvemo is closed;
The other end that described in another termination of described the tenth switch, twelvemo is closed;
The second end ground connection of described the 11 switch, the 3rd termination voltage source V1 interface of described the 11 switch.
Alternatively, described bus test environmental loads circuit comprises: the 13 switch, the 14 switch, the 15 switch, sixteenmo pass, the tenth minion pass, the second capacitor, the 3rd capacitor, the 4th capacitor, the 5th capacitor, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance and the 7th resistance, wherein
One end of described the 13 switch connects respectively the other end of described the 9th switch and one end that described twelvemo is closed, the CAN_H end of another termination CANScope Bus analyzer of described the 13 switch;
The other end of the tenth switch described in one termination of described the 14 switch, the CAN_L end of another termination CANScope Bus analyzer of described the 14 switch;
The CAN_H end of one termination CANScope Bus analyzer of described the 15 switch, the other end of described the 15 switch connects respectively one end of described the 5th resistance and one end of described the 4th capacitor, and the other end of the other end of described the 5th resistance and described the 4th capacitor connects respectively the CAN_L end of CANScope Bus analyzer;
The CAN_H end of the termination CANScope Bus analyzer that described sixteenmo closes, one end of the 6th resistance described in another termination that described sixteenmo closes, the other end of described the 6th resistance connects respectively one end of described the 7th resistance and one end of described the 5th capacitor, the other end ground connection of described the 5th capacitor;
Described the tenth minion close a termination described in the other end of the 7th electric capacity, the CAN_L end of another termination CANScope Bus analyzer that described the tenth minion is closed;
One end that described in one termination of described the 3rd resistance, twelvemo is closed, the CAN_H end of another termination CANScope Bus analyzer of described the 3rd resistance;
The other end of the tenth switch described in one termination of described the 4th resistance, the CAN_L end of another termination CANScope Bus analyzer of described the 4th resistance;
The CAN_H end of one termination CANScope Bus analyzer of described the second capacitor, the other end ground connection of described the second capacitor;
The CAN_L end of one termination CANScope Bus analyzer of described the 3rd capacitor, the other end ground connection of described the 3rd capacitor.
As shown from the above technical solution, embodiment of the present utility model has following beneficial effect:
1. can simulating bench test environment, facilitated the early development test to controller;
2. switch and rich interface, conveniently carry out the fault of controller CAN Physical layer and inject and ground skew test;
3. simple in structure, with low cost, can make in a large number and be applied to simultaneously the test of a plurality of controller exemplars;
4. can adjust flexibly component parameter according to baud rate, number of nodes and CAN principal wire bundle length, be beneficial to and reuse.
Accompanying drawing explanation
Fig. 1 represents the electrical block diagram of device of the testing CAN bus Physical layer of embodiment of the present utility model;
Fig. 2 represents the front view of device of the testing CAN bus Physical layer of embodiment of the present utility model;
Fig. 3 represents the vertical view of device of the testing CAN bus Physical layer of embodiment of the present utility model;
Fig. 4 represents the upward view of device of the testing CAN bus Physical layer of embodiment of the present utility model;
Fig. 5 represents the right view of device of the testing CAN bus Physical layer of embodiment of the present utility model;
Fig. 6 represents the left view of device of the testing CAN bus Physical layer of embodiment of the present utility model.
Embodiment
Exemplary embodiment of the present disclosure is described below with reference to accompanying drawings in more detail.Although shown exemplary embodiment of the present disclosure in accompanying drawing, yet should be appreciated that and can realize the disclosure and the embodiment that should do not set forth limits here with various forms.On the contrary, it is in order more thoroughly to understand the disclosure that these embodiment are provided, and can by the scope of the present disclosure complete convey to those skilled in the art.
As shown in Figure 1, be the schematic diagram of the device of the testing CAN bus Physical layer in embodiment of the present utility model, this device comprises: bus load circuit 11, fault injection circuit 12 and bus test environmental loads circuit 13.
The tested controller bus load circuit 11 being connected with filter-capacitor circuit for control bus terminal resistance, one end of this bus load circuit 11 is connected with the CAN_H end of CAN bus, and the other end of this load circuit is connected with the CAN_L end of CAN bus, alternatively, this bus load circuit comprises: the first switch S 1, the first resistance R 1, the second resistance R 2, second switch S2 and the first capacitor C1, wherein one end of the first switch S 1 is connected with the CAN_H end of CAN bus, one end of the first resistance R 1 is connected with the other end of the first switch S 1, the other end of the first resistance R 1 is connected with one end of the first capacitor C1 with one end of the second resistance R 2 respectively, the other end ground connection of the first capacitor C1, the other end of the second resistance R 2 is connected with one end of second switch S2, the other end of second switch S2 is connected with the CAN_L end of CAN bus.In bus load circuit, what the first capacitor C 1, the first resistance R 1 and the second resistance R 2 formed is terminal resistance impedance and filter-capacitor circuit, as known tested ECU has comprised terminal impedance circuit, should when test, disconnect the first switch S 1 and second switch S2, disconnect bus load circuit and survey being connected of ECU.
For controlling the fault injection circuit 12 of fault implant operation, be connected with bus load circuit 11, this fault injection circuit 12 comprises: the 3rd switch S 3, the 4th switch S 4, the 5th switch S 5, the 6th switch S 6, minion is closed S7, the 8th switch S8, the 9th switch S 9, the tenth switch S 10, the 11 switch S 11, twelvemo is closed S12 and voltage source V 1, by switch the 3rd switch S 3～the twelvemos, close S12 and can realize CAN bus short circuit, CAN bus broken circuit, the fault implant operations such as CAN bus and Vbat+ end or Vbat-end short circuit, and can utilize the 11 switch S 11 access voltage source V 1 interfaces, carry out being easily offset test.Wherein
The first end of the 3rd switch S 3 is connected with the CAN_H end of CAN bus, and the second end of the 3rd switch S 3 closes S7 first end with minion and is connected, and the 3rd end of the 3rd switch S 3 is connected with one end of the 9th switch S 9;
One end of the 4th switch S 4 is connected with the CAN_L end of CAN bus, and the second end of the 4th switch S 4 is connected with one end of the tenth switch S 10, and the 3rd end of the 4th switch S 4 is connected with one end of the 8th switch S8;
The 5th one end of switch S 5 and the Vbat+ of ECU end are connected, and the other end of the 5th switch S 5 is connected with voltage source V CC;
The 6th one end of switch S 6 and the Vbat-of ECU end are connected, and the other end of the 6th switch S 6 is connected with the first end of the 11 switch S 11;
Minion is closed the second termination voltage source VCC of S7, and minion is closed the 3rd end ground connection of S7;
The second termination voltage source VCC of the 8th switch S8, the 3rd end ground connection of the 8th switch S8;
Another termination twelvemo of the 9th switch S 9 is closed one end of S12;
Another termination twelvemo of the tenth switch S 10 is closed the other end of S12;
The second end ground connection of the 11 switch S 11, the 3rd termination voltage source V1 interface of the 11 switch S 11.
Be used for controlling CAN bus wire harness resistance value and capacitance, and the bus test environmental loads circuit 13 of input resistance value and input capacitance value, be connected with fault injection circuit 12.Bus test environmental loads circuit 13 comprises: the 13 switch S 13, the 14 switch S 14, the 15 switch S 15, sixteenmo closes S16, the tenth minion is closed S17, the second capacitor C2, the 3rd capacitor C3, the 4th capacitor C4, the 5th capacitor C5, the 3rd resistance R 3, the 4th resistance R 4, the 5th resistance R 5, the 6th resistance R 6 and the 7th resistance R 7, in bus test environmental loads circuit 13, by the components and parts of resistance capacitance shown in Fig. 1, can simulate other ECU except tested ECU in CAN bus and all connect CAN bus wire harness resistance value and capacitance when online, and input resistance value and input capacitance value.Wherein
One end of the 13 switch S 13 connects respectively the other end of the 9th switch S 9 and one end that twelvemo is closed S12, the CAN_H end of another termination CANScope Bus analyzer of the 13 switch S 13;
The other end of one termination the tenth switch S 10 of the 14 switch S 14, the CAN_L end of another termination CANScope Bus analyzer of the 14 switch S 14;
The CAN_H end of one termination CANScope Bus analyzer of the 15 switch S 15, the other end of the 15 switch S 15 connects respectively one end of the 5th resistance R 5 and one end of the 4th capacitor C4, and the other end of the other end of the 5th resistance R 5 and the 4th capacitor C4 connects respectively the CAN_L end of CANScope Bus analyzer;
Sixteenmo closes the CAN_H end of a termination CANScope Bus analyzer of S16, sixteenmo closes one end of another termination the 6th resistance R 6 of S16, the other end of the 6th resistance R 6 connects respectively one end of the 7th resistance R 7 and one end of the 5th capacitor C5, the other end ground connection of the 5th capacitor C5;
The other end of a termination the 7th electric capacity R7 of the S17 that the tenth minion is closed, the tenth minion is closed the CAN_L end of another termination CANScope Bus analyzer of S17;
One termination twelvemo of the 3rd resistance R 3 is closed one end of S12, the CAN_H end of another termination CANScope Bus analyzer of the 3rd resistance R 3;
The other end of one termination the tenth switch S 10 of the 4th resistance R 4, the CAN_L end of another termination CANScope Bus analyzer of the 4th resistance R 4;
The CAN_H end of a termination CANScope Bus analyzer of the second capacitor C2, the other end ground connection of the second capacitor C2;
The CAN_L end of a termination CANScope Bus analyzer of the 3rd capacitor C3, the other end ground connection of the 3rd capacitor C3.
Be below the detailed introduction of the circuit devcie type selecting shown in Fig. 1, the parameter relating in literary composition is all with reference to the vehicle-mounted bus environment of representational middle-grade car on the market, and as without special networks structure, circuit shown in Fig. 1 can meet general operational requirement.
The Parameter Conditions of principle diagram design shown in Fig. 1 is as follows: bus baud rate 500kbps; Total nodes n=16; CAN line principal wire bundle length L=25m; Unit length lead capacitance reference value c=150pF/m; Unit length conductor resistance reference value r=100m Ω/m; Minimum differential input resistance representative value rdiff=20k Ω; Maximum differential-input capacitance representative value cdiff=10pF, the parameter of each components and parts can calculate by following formula:
R3=R4=r*L=0.1*25=2.5Ω≈3Ω；
C2=C3=c*L=150exp-12*25=3.72nF≈3.9nF；
R5=rdiff/（n-3）=20000/（16-3）=1538Ω≈1.5kΩ；
C4=cdiff*（n-3）=10exp-12*（16-3）=130pF≈150pF。
According to the difference of number of network node, principal wire bundle length, can be corresponding the value of change n and L, Computing Meta device parameters.
Referring to Fig. 2～Fig. 6, it is the structural representation of the device of testing CAN bus in embodiment of the present utility model.In embodiment of the present utility model, device can be selected the pattern into control enclosure.
With reference to the circuit diagram shown in figure 1, switch (S1～S16) and binding post (the corresponding binding post of upper each passage of J1～J3) are installed on the front of device, for these switches and binding post are identified, on the guidance panel of device, can paste or print pattern.As shown in Figure 2, four, left side binding post connects respectively CAN bus and the power lead of tested ECU, and six, right side binding post connects respectively the CANscope(CAN oscillograph for measuring) and two-way CAN test channel;
If preliminary work is fairly perfect before test, tested ECU and each testing apparatus have all been made DB9 interface plug, this device at top, left side and right side be provided with respectively DB9 male socket, connection easy to use, referring to Fig. 3, shown in Fig. 5 and Fig. 6;
In the bottom of device, be provided with the jack of three φ 4mm, connect respectively the direct current V1 that is used for being offset test and needs to access, and the direct supply two ends that power for test macro, referring to Fig. 4.
The above is only preferred implementation of the present utility model; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (4)
1. a device for testing CAN bus Physical layer, is characterized in that, comprising:
For the tested controller bus load circuit of control terminal resistance and filter-capacitor circuit, one end of described bus load circuit is connected with the CAN_H end of CAN bus, and the other end of described load circuit is connected with the CAN_L end of CAN bus;
For controlling the fault injection circuit of fault implant operation, be connected with described bus load circuit; And
Be used for controlling CAN bus wire harness resistance value and capacitance, and the bus test environmental loads circuit of input resistance value and input capacitance value, be connected with described fault injection circuit.
2. device according to claim 1, it is characterized in that, described bus load circuit comprises: the first switch, the first resistance, the second resistance, second switch and the first capacitor, one end of wherein said the first switch is connected with the CAN_H end of CAN bus, one end of described the first resistance is connected with the other end of described the first switch, the other end of described the first resistance is connected with one end of described the first capacitor with one end of described the second resistance respectively, the other end ground connection of described the first capacitor, the other end of described the second resistance is connected with one end of described second switch, the other end of described second switch is connected with the CAN_L end of CAN bus.
3. device according to claim 2, it is characterized in that, described fault injection circuit comprises: the 3rd switch, the 4th switch, the 5th switch, the 6th switch, minion pass, the 8th switch, the 9th switch, the tenth switch, the 11 switch, twelvemo are closed and voltage source V 1 interface, the first end of wherein said the 3rd switch is connected with the CAN_H end of CAN bus, the second end of described the 3rd switch is connected with the first end that described minion is closed, and the 3rd end of described the 3rd switch is connected with one end of described the 9th switch;
One end of described the 4th switch is connected with the CAN_L end of CAN bus, and the second end of described the 4th switch is connected with one end of described the tenth switch, and the 3rd end of described the 4th switch is connected with one end of described the 8th switch;
One end of described the 5th switch is connected with the Vbat+ end of CAN bus, and the other end of described the 5th switch is connected with voltage source V CC;
One end of described the 6th switch is connected with the Vbat-end of CAN bus, and the other end of described the 6th switch is connected with the first end of described the 11 switch;
The second termination voltage source VCC that described minion is closed, the 3rd end ground connection that described minion is closed;
The second termination voltage source VCC of described the 8th switch, the 3rd end ground connection of described the 8th switch;
One end that described in another termination of described the 9th switch, twelvemo is closed;
The other end that described in another termination of described the tenth switch, twelvemo is closed;
The second end ground connection of described the 11 switch, the 3rd termination voltage source V1 interface of described the 11 switch.
4. device according to claim 3, it is characterized in that, described bus test environmental loads circuit comprises: the 13 switch, the 14 switch, the 15 switch, sixteenmo pass, the tenth minion pass, the second capacitor, the 3rd capacitor, the 4th capacitor, the 5th capacitor, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance and the 7th resistance, wherein
One end of described the 13 switch connects respectively the other end of described the 9th switch and one end that described twelvemo is closed, the CAN_H end of another termination CANScope Bus analyzer of described the 13 switch;
The other end of the tenth switch described in one termination of described the 14 switch, the CAN_L end of another termination CANScope Bus analyzer of described the 14 switch;
The CAN_H end of one termination CANScope Bus analyzer of described the 15 switch, the other end of described the 15 switch connects respectively one end of described the 5th resistance and one end of described the 4th capacitor, and the other end of the other end of described the 5th resistance and described the 4th capacitor connects respectively the CAN_L end of CANScope Bus analyzer;
The CAN_H end of the termination CANScope Bus analyzer that described sixteenmo closes, one end of the 6th resistance described in another termination that described sixteenmo closes, the other end of described the 6th resistance connects respectively one end of described the 7th resistance and one end of described the 5th capacitor, the other end ground connection of described the 5th capacitor;
Described the tenth minion close a termination described in the other end of the 7th electric capacity, the CAN_L end of another termination CANScope Bus analyzer that described the tenth minion is closed;
One end that described in one termination of described the 3rd resistance, twelvemo is closed, the CAN_H end of another termination CANScope Bus analyzer of described the 3rd resistance;
The other end of the tenth switch described in one termination of described the 4th resistance, the CAN_L end of another termination CANScope Bus analyzer of described the 4th resistance;
The CAN_H end of one termination CANScope Bus analyzer of described the second capacitor, the other end ground connection of described the second capacitor;
The CAN_L end of one termination CANScope Bus analyzer of described the 3rd capacitor, the other end ground connection of described the 3rd capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320454038.7U CN203405730U (en) | 2013-07-26 | 2013-07-26 | An apparatus for testing the physical layer of a CAN bus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320454038.7U CN203405730U (en) | 2013-07-26 | 2013-07-26 | An apparatus for testing the physical layer of a CAN bus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203405730U true CN203405730U (en) | 2014-01-22 |
Family
ID=49941660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320454038.7U Expired - Fee Related CN203405730U (en) | 2013-07-26 | 2013-07-26 | An apparatus for testing the physical layer of a CAN bus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203405730U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106773778A (en) * | 2016-11-21 | 2017-05-31 | 北京汽车股份有限公司 | Automobile CAN-bus physical layer simulation testing device and method |
| CN110912763A (en) * | 2018-09-17 | 2020-03-24 | 联合汽车电子有限公司 | CAN bus test integrated circuit, test system and test method |
-
2013
- 2013-07-26 CN CN201320454038.7U patent/CN203405730U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106773778A (en) * | 2016-11-21 | 2017-05-31 | 北京汽车股份有限公司 | Automobile CAN-bus physical layer simulation testing device and method |
| CN110912763A (en) * | 2018-09-17 | 2020-03-24 | 联合汽车电子有限公司 | CAN bus test integrated circuit, test system and test method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104850112A (en) | Electric automobile vehicle controller test method and system | |
| CN201893058U (en) | Safe simulation training system for distribution room | |
| CN106227062B (en) | Diesel locomotive microcomputer controls semi-matter simulating system and method | |
| CN103440803A (en) | True-voltage simulation-current closed-loop all-true training system for 10kV power distribution device | |
| CN103728885A (en) | Comprehensive wiring management method based on aviation bus | |
| CN108490290B (en) | Miniature simulation transmission line comprehensive experiment cabinet of electric power system | |
| CN204965174U (en) | Power hardware is at ring test system | |
| CN203405730U (en) | An apparatus for testing the physical layer of a CAN bus | |
| CN102004188A (en) | Device for simulating insulation resistor and method for calibrating accuracy of monitoring device | |
| CN206773074U (en) | Line impedance analogue means and system | |
| CN204302403U (en) | The simulation of electrical network stability control device and Test to Failure instrument | |
| CN104794968B (en) | Low-voltage electric energy metering is installed and wiring analysis comprehensive training device | |
| CN204102409U (en) | S11 type substation transformer insulation resistance and direct current resistance failure simulation device | |
| CN105204485A (en) | Digital electric power stability control system tester | |
| CN203563081U (en) | A CAN bus testing apparatus commonly used by vehicles | |
| CN205781932U (en) | A kind of subway track switch external locking oiling device control circuit | |
| CN203520719U (en) | 10kV power distribution unit actual voltage simulation current closed-loop all-real training system | |
| CN204679588U (en) | High-tension distributing line earth fault simulation table | |
| CN204166775U (en) | Biousse banding pattern cell neural network chaos circuit is bought on three rank | |
| CN108181835B (en) | A kind of electric system DC grid real-time emulation method and device | |
| CN210199216U (en) | Anti-electricity-stealing full-factor test platform | |
| CN203706532U (en) | Transmission line practical training device | |
| CN203951066U (en) | A kind of 10kV combined-type box becomes inlet wire insulated isolated device | |
| CN203376911U (en) | A transformer intelligent simulating apparatus | |
| CN207081825U (en) | Massive quantity power supply and measurement electricity-stealing simulating and anti-electricity-theft proof of algorithm platform |
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: 20140122 Termination date: 20210726 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |