CN109032030A - A kind of overlength trackless bus high-voltaghe compartment and auxiliary converter cabinet monitor system and method - Google Patents
A kind of overlength trackless bus high-voltaghe compartment and auxiliary converter cabinet monitor system and method Download PDFInfo
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- CN109032030A CN109032030A CN201810933538.6A CN201810933538A CN109032030A CN 109032030 A CN109032030 A CN 109032030A CN 201810933538 A CN201810933538 A CN 201810933538A CN 109032030 A CN109032030 A CN 109032030A
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- auxiliary converter
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000012544 monitoring process Methods 0.000 claims abstract description 26
- 230000002093 peripheral effect Effects 0.000 claims abstract description 22
- 239000003990 capacitor Substances 0.000 claims description 14
- 230000008569 process Effects 0.000 claims description 14
- 238000012545 processing Methods 0.000 claims description 9
- 230000000875 corresponding effect Effects 0.000 claims description 8
- 238000005070 sampling Methods 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 7
- 230000001276 controlling effect Effects 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 6
- 238000002955 isolation Methods 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 5
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 230000002452 interceptive effect Effects 0.000 claims description 2
- 210000001367 artery Anatomy 0.000 claims 1
- 210000003462 vein Anatomy 0.000 claims 1
- 239000013078 crystal Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0428—Safety, monitoring
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/26—Pc applications
- G05B2219/2612—Data acquisition interface
Abstract
The present invention provides a kind of overlength trackless bus high-voltaghe compartments and auxiliary converter cabinet to monitor system and method, the system includes main control chip and peripheral circuit engaged therewith, wherein, main control chip is ARM7 processor, it includes CAN bus transceiving chip, for receiving the CAN signal of car running computer sending, analyzes CAN signal, running information is read, and high-voltaghe compartment and auxiliary converter cabinet operation information are uploaded to car running computer by CAN bus.Monitoring system of the invention by acquiring high-voltaghe compartment and auxiliary converter cabinet voltage, electric current, CAN signal etc. in real time, judge whether high-voltaghe compartment and auxiliary converter cabinet working condition are normal, and the state of high-voltaghe compartment and auxiliary converter cabinet is uploaded into car running computer by CAN bus.
Description
Technical field
The present invention relates to electrical monitoring technical fields, particularly, are related to a kind of overlength trackless bus high-voltaghe compartment and auxiliary becomes
It flows cabinet and monitors system and method.
Background technique
Under the vigorously supporting of national policy, the development of New energy electric bus is swift and violent, as new energy overlength trackless bus
Distribution system, DC24V, DC750V and three-phase AC380V performance of the output of high-voltaghe compartment and auxiliary converter cabinet directly determine newly
Whether stable operation seems particularly critical for the performance of energy overlength trackless bus, high-voltaghe compartment and auxiliary converter cabinet.
Summary of the invention
It is an object of that present invention to provide a kind of overlength trackless bus high-voltaghe compartments and auxiliary converter cabinet to monitor system and method, with
Solve the technical problems such as the real-time monitoring of high-voltaghe compartment and auxiliary converter cabinet operating status.
The present invention provides a kind of overlength trackless bus high-voltaghe compartment and auxiliary converter cabinet monitor system, including main control chip with
And peripheral circuit engaged therewith, the main control chip are ARM7 processor comprising CAN bus transceiving chip, for receiving
The CAN signal that car running computer issues analyzes CAN signal, reads running information, and by high-voltaghe compartment and auxiliary converter cabinet operation information
Car running computer is uploaded to by CAN bus；The peripheral circuit includes:
The CAN bus circuit of 2 road different frequencies；
Multiple sensor signal acquisition circuit is sent to master control core for acquiring plurality of voltages, electric current and temperature signal
Piece is monitored the working condition and coupled situation of high-voltaghe compartment and auxiliary converter cabinet；
Multichannel low-voltage relay signal output apparatus；
High voltage power supply acquisition process comparison circuit.
Preferably, the monitoring system includes multiple signal acquisition mouths and output control mouth, and the main control chip is ARM7
32-bit microprocessor, pin connection is as follows: reference voltage of the 6#VBAT pin as microprocessor, external reference circuit,
The reference circuit includes VDD power supply and B1 power supply (failure data protection power supply), and the two passes through diode D1 and two poles respectively
It is connected to 6#VBAT pin after pipe D2 is in parallel, is additionally provided with one on the connecting line of diode D1 and diode D2 and 6#VBAT pin
A branch, branch road are equipped with filter capacitor C2；8# pin and 9# pin meet external low frequency crystal oscillator U3, in microprocessor low-power consumption
With it is standby when work；#12 pin and #13 pin meet external high frequency crystal oscillator U5；Remaining pin outer signal acquisition port and output control
Donsole.
Preferably, the main control chip is based on C language compiler.
Preferably, the main control chip is additionally provided with USB interface, to carry out program upgrading and maintenance by flash disk.
Preferably, the CAN bus circuit is made of CAN transceiver and peripheral circuit engaged therewith, is passed for data
It is defeated and with car running computer communicate.
It is further preferred that the CAN bus circuit structure is as follows:
It receives pin CAN1-RX, send #70, #71 pin that pin CAN1-TX connects ARM7 processor respectively, and respectively
It is transmitted to transceiver U24 by resistance R45, resistance R44, during which passes through resistance R17 respectively, capacitor C9 is pulled up, or is passed through
Resistance R18, capacitor C10 are pulled up, and are enhanced signal strength, are communicated with car running computer, and data are transmitted；
Receive pin CAN2-RX, transmission pin CAN2-TX connects #51, #52 pin of ARM7 processor, and passes through respectively
Resistance R42, resistance R43 are transmitted to transceiver U23, during which pass through resistance R15 respectively, capacitor C7 is pulled up, or pass through resistance
R16, capacitor C8 are pulled up, and signal strength is enhanced, and are communicated with the peripheral circuit of other cooperation main control chips, transmit number
According to.
Preferably, the collecting sensor signal circuit from operational amplifier TLC2261AI, sampling resistor and with it
Peripheral circuit composition.
It is further preferred that the collecting sensor signal circuit includes several acquisition modules in parallel, each acquisition
Module is acquired by small resistance value sampling resistor, is then delivered to operational amplifier TLC2261AI and is carried out calculation process.
Preferably, the low-voltage relay signal output apparatus is made of driving chip and high-voltage relay, for driving
The high-power electric appliances such as protective relay.
It is further preferred that the low-voltage relay signal output apparatus includes two branches, it is respectively equipped with triode Q2
With diode D7, signal is controlled by resistance R65 and is sent to triode Q2, for controlling triode Q2 on-off, and then control relay
Device, diode D7 are freewheeling diode, are used for protective relay coil.
Preferably, the high voltage power supply acquisition process comparison circuit is by sampling resistor, operational amplifier and engaged therewith
Peripheral circuit composition, for parameters such as monitoring power voltages.
It is further preferred that the isolated power supply module is photoelectrical coupler.
It is further preferred that the high voltage power supply acquisition process comparison circuit principle is as follows: sampling resistor group believes high pressure
Number it is respectively sent to high_voltage isolation module U1 and high_voltage isolation module U8, they are respectively transmitted to corresponding operation by resistance and put
Operation is carried out in big device U6, and operation result is sent to the signal acquisition mouth of monitoring system.
Preferably, the peripheral circuit with main control chip cooperation further includes pulse-width modulation circuit (PWM), for controlling superpressure letter
Number, it prevents from interfering system overvoltage.
It is further preferred that 0~24V that the pulse-width modulation circuit is made of triode BCX55 and triode 2SC2412
Pulse-width modulation circuit.
Still more preferably, the pulse-width modulation circuit principle is as follows: control signal PWM2 is transmitted to by resistance R30
Triode Q2, for controlling triode Q2 on-off；The collector of triode Q2 is pulled up through resistance R15, enhances signal strength, signal
Collector, resistance R23 through triode Q2 are transmitted to triode Q1, control the output that its on-off realizes pulsewidth modulation.
A kind of corresponding overlength trackless bus high-voltaghe compartment of above system and auxiliary converter cabinet monitoring method, specific steps are such as
Under:
S1. after high-voltaghe compartment and auxiliary converter cabinet are powered, monitoring system obtains electric, beginning and car running computer progress CAN communication
" shaking hands " carries out data transmission after communication " shaking hands " success；
S2. multiple sensor signal acquisition circuit starts collection voltages, electric current and temperature signal, acquires by high voltage power supply
Main control chip is sent to after processing comparison circuit processing and carries out calculation processing, whole process is recorded, and by gained high-voltaghe compartment
And the working condition of auxiliary converter cabinet is sent to car running computer by CAN bus；
S3. judge whether the working condition of high-voltaghe compartment and auxiliary converter cabinet has exception, be to enter step S4, otherwise tie
Beam；
S4. main control chip carries out corresponding actions by multichannel low-voltage relay signal output apparatus, protects high-voltaghe compartment and auxiliary
Converter cabinet is helped, and car running computer is sent by CAN bus by this abnormal signal.
Preferably, in step S2, voltage, electric current and temperature signal are sent to main control chip after amplifier is handled.
The invention has the following advantages:
Monitoring system of the invention is sentenced by acquiring high-voltaghe compartment and auxiliary converter cabinet voltage, electric current, CAN signal etc. in real time
Whether disconnected high-voltaghe compartment and auxiliary converter cabinet working condition are normal, and the state of high-voltaghe compartment and auxiliary converter cabinet is passed through CAN bus
Upload to car running computer.In the monitoring system that existing AC and DC coexists, it is straight that common monitoring mode can only monitor friendship
Voltage value, the quality and size of current of voltage unable to monitor are flowed, this system can monitor the voltage quality of alternating current-direct current, can also supervise
Whether the numerical value for surveying electric current meets demand for control, i.e. whether the product gesture of supply harmonic meets the requirements, and is high-voltaghe compartment and auxiliary converter
The normal operation of cabinet provides reliable guarantee.
The present invention can supervise in real time the out-put supply performance quality of high-voltaghe compartment and auxiliary converter cabinet, operating status etc.
The fault message of high-voltaghe compartment and auxiliary converter cabinet feedback to car running computer is guaranteed high-voltaghe compartment by modes such as CAN bus by control
And auxiliary converter cabinet is run with optimum state.The present invention has many advantages, such as simple and compact for structure, good reliability, can guarantee new energy
Overlength trackless bus operational excellence
In order to ensure that high-voltaghe compartment and auxiliary converter cabinet stable operation, this equipment are communicated with car running computer, real-time monitoring
The operating status of high-voltaghe compartment and auxiliary converter cabinet, DC power supply, AC power source and function including high-voltaghe compartment and auxiliary converter cabinet
Deng, and fault message and operating status are uploaded into car running computer.
The present invention uses patch type electronic component, low in energy consumption, small in size, high reliablity.By welding equipment, electronics
Component is integrated on pcb board, the integrality of assurance function.
Detailed description of the invention
The attached drawing constituted part of this application is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is main control chip and peripheral circuit structural block diagram of the invention；
Fig. 2 is 2 road different frequency CAN bus circuit connection figures of the invention；
Fig. 3 is collecting sensor signal circuit connection diagram；
Fig. 4 is low-voltage relay signal output apparatus connection figure；
Fig. 5 is high voltage power supply acquisition process comparison circuit connection figure；
Fig. 6 is pulse-width modulation circuit connection figure；
Fig. 7 is software program figure of the invention；
Other than objects, features and advantages described above, there are also other objects, features and advantages by the present invention.
Below with reference to figure, the present invention is described in further detail.
Specific embodiment
The embodiment of the present invention is described in detail below in conjunction with attached drawing, but the present invention can be limited according to claim
Fixed and covering multitude of different ways is implemented.
As shown in Figure 1 a kind of overlength trackless bus high-voltaghe compartment and auxiliary converter cabinet monitor system, including main control chip with
And peripheral circuit engaged therewith, main control chip are ARM7 processor comprising CAN bus transceiving chip, for receiving driving
The CAN signal that computer issues analyzes CAN signal, reads running information, and high-voltaghe compartment and auxiliary converter cabinet operation information are passed through
CAN bus is uploaded to car running computer；Peripheral circuit includes:
The CAN bus circuit of 2 road different frequencies；
Multiple sensor signal acquisition circuit is sent to master control core for acquiring plurality of voltages, electric current and temperature signal
Piece is monitored the working condition and coupled situation of high-voltaghe compartment and auxiliary converter cabinet；
Multichannel low-voltage relay signal output apparatus；
High voltage power supply acquisition process comparison circuit.
Wherein, monitoring system includes multiple signal acquisition mouths and output control mouth, and the main control chip is 32 of ARM7
Microprocessor, pin connection are as follows: reference voltage of the 6#VBAT pin as microprocessor, external reference circuit, the base
Quasi- circuit includes VDD power supply and B1 power supply (failure data protection power supply), and the two passes through diode D1 and diode D2 simultaneously respectively
It is connected to 6#VBAT pin after connection, is additionally provided with a branch on the connecting line of diode D1 and diode D2 and 6#VBAT pin
Road, branch road are equipped with filter capacitor C2；8# pin and 9# pin meet external low frequency crystal oscillator U3, microprocessor low-power consumption and to
It works when machine；#12 pin and #13 pin meet external high frequency crystal oscillator U5；Remaining pin outer signal acquisition port and output control mouth.
Main control chip is based on C language compiler, is specifically shown in Fig. 7.Main control chip is additionally provided with USB interface, to pass through flash disk
Carry out program upgrading and maintenance.
CAN bus circuit is made of high_voltage isolation device and CAN transceiver and peripheral circuit engaged therewith, is used for and row
Vehicle dataphone.CAN bus circuit structure (Fig. 2) is as follows:
It receives pin CAN1-RX, send #70, #71 pin that pin CAN1-TX connects ARM7 processor respectively, and respectively
It is transmitted to transceiver U24 by resistance R45, resistance R44, during which passes through resistance R17 respectively, capacitor C9 is pulled up, or is passed through
Resistance R18, capacitor C10 are pulled up, and are enhanced signal strength, are communicated with car running computer, and data are transmitted；
Receive pin CAN2-RX, transmission pin CAN2-TX connects #51, #52 pin of ARM7 processor, and passes through respectively
Resistance R42, resistance R43 are transmitted to transceiver U23, during which pass through resistance R15 respectively, capacitor C7 is pulled up, or pass through resistance
R16, capacitor C8 are pulled up, and signal strength is enhanced, and are communicated with the peripheral circuit of other cooperation main control chips, transmit number
According to.
Collecting sensor signal circuit is by operational amplifier TLC2261AI, sampling resistor and peripheral circuit engaged therewith
It forms (Fig. 3), collecting sensor signal circuit includes several acquisition modules in parallel, and each acquisition module is sampled by small resistance value
Resistance is acquired, and is then delivered to operational amplifier TLC2261AI and is carried out calculation process.
Low-voltage relay signal output apparatus is made of driving chip and high-voltage relay, for driving protective relay etc.
High-power electric appliance (Fig. 4), low-voltage relay signal output apparatus include two branches, are respectively equipped with triode Q2 and diode
D7 controls signal by resistance R65 and is sent to triode Q2, for controlling triode Q2 on-off, and then controls relay, diode
D7 is freewheeling diode, is used for protective relay coil.
High voltage power supply acquisition process comparison circuit is by sampling resistor, operational amplifier, triode and periphery engaged therewith
Circuit composition, for parameters such as monitoring power voltages.Isolated power supply module is photoelectrical coupler (Fig. 5), at high voltage power supply acquisition
It is as follows to manage comparison circuit principle: high-voltage signal is respectively sent to high_voltage isolation module U1 and high_voltage isolation module by sampling resistor group
U8, they are respectively transmitted to carry out operation in corresponding operational amplifier U6 by resistance, and operation result is sent to monitoring
The signal acquisition mouth of system.
Peripheral circuit with main control chip cooperation further includes that pulse-width modulation circuit (PWM) is prevented for controlling superpressure signal
System overvoltage is interfered.0~24V pulse-width modulation circuit that pulse-width modulation circuit is made of triode BCX55 and triode 2412
(Fig. 6), pulse-width modulation circuit principle are as follows: control signal PWM2 is transmitted to triode Q2 by resistance R30, for controlling three poles
Pipe Q2 on-off；The collector of triode Q2 is pulled up through resistance R15, enhances signal strength, collector, electricity of the signal through triode Q2
Resistance R23 is transmitted to triode Q1, controls the output that its on-off realizes pulsewidth modulation.
A kind of corresponding overlength trackless bus high-voltaghe compartment of above system and auxiliary converter cabinet monitoring method, specific steps are such as
Under:
S1. after high-voltaghe compartment and auxiliary converter cabinet are powered, monitoring system obtains electric, beginning and car running computer progress CAN communication
" shaking hands " carries out data transmission after communication " shaking hands " success；
S2. multiple sensor signal acquisition circuit starts collection voltages, electric current and temperature signal, acquires by high voltage power supply
Main control chip is sent to after processing comparison circuit processing and carries out calculation processing, whole process is recorded, and by gained high-voltaghe compartment
And the working condition of auxiliary converter cabinet is sent to car running computer by CAN bus；
S3. judge whether the working condition of high-voltaghe compartment and auxiliary converter cabinet has exception, be to enter step S4, otherwise tie
Beam；
S4. main control chip carries out corresponding actions by multichannel low-voltage relay signal output apparatus, protects high-voltaghe compartment and auxiliary
Converter cabinet is helped, and car running computer is sent by CAN bus by this abnormal signal.
In step S2, voltage, electric current and temperature signal are sent to main control chip after amplifier is handled.
The present invention can utilize C language compiler (Fig. 7), each electronic component work be controlled, to high-voltaghe compartment and auxiliary
Converter cabinet working condition and coupled situation, which are acquired and pass through CAN bus, uploads to car running computer.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of overlength trackless bus high-voltaghe compartment and auxiliary converter cabinet monitor system, which is characterized in that including main control chip and
Peripheral circuit engaged therewith, the main control chip are ARM7 processor comprising CAN bus transceiving chip, for receiving row
The CAN signal that vehicle computer issues analyzes CAN signal, reads running information, and high-voltaghe compartment and auxiliary converter cabinet operation information are led to
It crosses CAN bus and is uploaded to car running computer；The peripheral circuit includes:
The CAN bus circuit of 2 road different frequencies；
Multiple sensor signal acquisition circuit is sent to main control chip for acquiring plurality of voltages, electric current and temperature signal, right
The working condition and coupled situation of high-voltaghe compartment and auxiliary converter cabinet are monitored；
Multichannel low-voltage relay signal output apparatus；
High voltage power supply acquisition process comparison circuit.
2. monitoring system according to claim 1, which is characterized in that the CAN bus circuit by high_voltage isolation device and
CAN transceiver and peripheral circuit engaged therewith composition, for being communicated with car running computer.
3. monitoring system according to claim 2, which is characterized in that the CAN bus circuit structure is as follows:
Receive pin CAN1-RX, transmission pin CAN1-TX connects #70, #71 pin of ARM7 processor respectively, and passes through respectively
Resistance R45, resistance R44 are transmitted to transceiver U24, during which pass through resistance R17 respectively, capacitor C9 is pulled up, or pass through resistance
R18, capacitor C10 are pulled up, and are enhanced signal strength, are communicated with car running computer, and data are transmitted；
Receive pin CAN2-RX, transmission pin CAN2-TX connects #51, #52 pin of ARM7 processor, and passes through resistance respectively
R42, resistance R43 are transmitted to transceiver U23, during which pass through resistance R15 respectively, capacitor C7 is pulled up, or by resistance R16,
Capacitor C8 is pulled up, and signal strength is enhanced, and is communicated with the peripheral circuit of other cooperation main control chips, transmits data.
4. monitoring system according to claim 1, which is characterized in that the collecting sensor signal circuit is by operation amplifier
Device TLC2261AI, sampling resistor and peripheral circuit engaged therewith composition.
5. monitoring system according to claim 1, which is characterized in that the low-voltage relay signal output apparatus is by driving
Chip and high-voltage relay composition, for driving the high-power electric appliances such as protective relay.
6. monitoring system according to claim 1, which is characterized in that the high voltage power supply acquisition process comparison circuit is by adopting
Sample resistance, operational amplifier and peripheral circuit composition, for parameters such as monitoring power voltages.
7. monitoring system according to claim 1, which is characterized in that the peripheral circuit with main control chip cooperation further includes arteries and veins
Wide modulation circuit prevents from interfering system overvoltage for controlling superpressure signal.
8. a kind of corresponding overlength trackless bus high-voltaghe compartment of system described in any one of claim 1~7 and auxiliary converter cabinet prison
Survey method, which is characterized in that specific step is as follows:
S1. after high-voltaghe compartment and auxiliary converter cabinet are powered, monitoring system obtains electric, starts " to hold with car running computer progress CAN communication
Hand " carries out data transmission after communication " shaking hands " success；
S2. multiple sensor signal acquisition circuit starts collection voltages, electric current and temperature signal, by high voltage power supply acquisition process
Main control chip is sent to after comparison circuit processing and carries out calculation processing, whole process is recorded, and by gained high-voltaghe compartment and auxiliary
The working condition of converter cabinet is helped to be sent to car running computer by CAN bus；
S3. judge whether the working condition of high-voltaghe compartment and auxiliary converter cabinet has exception, be to enter step S4, otherwise terminate；
S4. main control chip carries out corresponding actions by multichannel low-voltage relay signal output apparatus, and high-voltaghe compartment and auxiliary is protected to become
Cabinet is flowed, and car running computer is sent by CAN bus by this abnormal signal.
9. monitoring method according to claim 8, which is characterized in that in step S2, voltage, electric current and temperature signal pass through
Main control chip is sent to after amplifier processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810933538.6A CN109032030B (en) | 2018-08-16 | 2018-08-16 | Monitoring system and method for super-long trackless bus high-voltage box and auxiliary converter cabinet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810933538.6A CN109032030B (en) | 2018-08-16 | 2018-08-16 | Monitoring system and method for super-long trackless bus high-voltage box and auxiliary converter cabinet |
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| CN109032030B CN109032030B (en) | 2024-04-09 |
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