CN115968109B - Control circuit board for space station on-line cabinet - Google Patents
Control circuit board for space station on-line cabinet Download PDFInfo
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- CN115968109B CN115968109B CN202211719393.2A CN202211719393A CN115968109B CN 115968109 B CN115968109 B CN 115968109B CN 202211719393 A CN202211719393 A CN 202211719393A CN 115968109 B CN115968109 B CN 115968109B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The invention relates to a control circuit board for a space station online cabinet, comprising: the IIC expansion GPIO chip, the tri-state transceiver and at least one analog acquisition chip; the IIC extended GPIO chip is used to: according to the control instruction, a target GPIO signal is sent to the electronic fuse corresponding to the target to-be-controlled component through the tri-state transceiver, so that the electronic fuse corresponding to the target to-be-controlled component is controlled to be opened or closed through the target GPIO signal, and the power supply circuit of the target to-be-controlled component is controlled to be turned on or off; each analog acquisition chip is used for: and collecting a target analog quantity signal. The control circuit board provided by the invention can be suitable for various scenes needing analog quantity acquisition and control of the component assembly, and can acquire analog quantities such as voltage remote measurement and temperature while realizing power-on and power-off control of the low-power component assembly of the online cabinet, so that the electronic state of the online maintenance operation support unit of the online cabinet can be monitored in real time.
Description
Technical Field
The invention relates to the technical field of on-orbit control, in particular to a control circuit board for an on-line cabinet of a space station.
Background
An online maintenance and adjustment operation cabinet (abbreviated as an online cabinet) is a scientific and technical experiment platform for space station application system planning, and mainly provides a workplace for on-orbit fault diagnosis, relay level maintenance and manual or mechanical operation for space station effective load. In the current online cabinet electric cabinet, a control board capable of collecting analog quantities such as power-on and power-off control, voltage remote measurement and temperature of a low-power part component is lacking. Accordingly, there is a need to provide a solution to the problems of the prior art.
Disclosure of Invention
In order to solve the technical problems, the invention provides a control circuit board for a space station online cabinet.
The technical scheme of the control circuit board for the space station online cabinet is as follows:
comprising the following steps: the IIC expansion GPIO chip, the tri-state transceiver and at least one analog acquisition chip; each path of GPIO output by the IIC extended GPIO chip is connected with the input end of the tri-state transceiver, an electronic fuse is arranged in the power supply circuit of each to-be-controlled part component, and each path of GPIO output by the tri-state transceiver is respectively used for being connected with one electronic fuse;
the IIC extended GPIO chip is used for: according to a control instruction, a target GPIO signal is sent to an electronic fuse corresponding to a target to-be-controlled component through the tri-state transceiver, so that the electronic fuse corresponding to the target to-be-controlled component is controlled to be opened or closed through the target GPIO signal, and the power supply circuit of the target to-be-controlled component is controlled to be opened or closed;
each analog acquisition chip is used for: and collecting a target analog quantity signal.
The control circuit board for the space station online cabinet has the following beneficial effects:
the control circuit board provided by the invention can be suitable for various scenes needing analog quantity acquisition and control of the component assembly, and can acquire analog quantities such as voltage remote measurement and temperature while realizing power-on and power-off control of the low-power component assembly of the online cabinet, so that the electronic state of the online maintenance operation support unit of the online cabinet can be monitored in real time.
On the basis of the scheme, the control circuit board for the space station online cabinet can be improved as follows.
Further, an IIC monitor is also arranged in the power supply circuit of each to-be-controlled part component;
each IIC monitor is to: and collecting the current value and the current voltage value in the corresponding power supply circuit in real time.
Further, an operational amplifier chip is arranged in each analog quantity acquisition chip circuit for acquiring analog quantity.
Further, the method further comprises the following steps: the first IIC interface and the second IIC interface;
each analog acquisition chip is specifically used for: acquiring the target analog quantity signal according to the analog quantity acquisition instruction received by the first IIC interface;
the IIC extended GPIO chip is specifically used for: and controlling the on/off of the power supply circuit of the target to-be-controlled part component according to the control instruction received by the second IIC interface.
Further, the method further comprises the following steps: and pull-up voltages are respectively applied to the tail end of an SCL line and the tail end of an SDA line of a circuit corresponding to the first IIC interface.
Further, the method further comprises the following steps: the first input power supply supplies power to the power supply chip;
the power chip is used for: and converting the original input voltage into the voltage adapted by each analog acquisition chip, each IIC monitor and the IIC expansion GPIO chip respectively so as to supply power to each analog acquisition chip, each IIC monitor and the IIC expansion GPIO chip respectively.
Further, the method further comprises the following steps: the first IIC interface and the second IIC interface are arranged on the VPX connector;
the VPX connector is for: interfaces are provided for the input power supply, each analog signal and each component of the portion to be controlled.
Further, the portion to be controlled assembly includes: load resource interface, first LED display screen, leading collection box, first observation camera, leading collection box, second observation camera, second LED display screen.
Further, the IIC extended GPIO chip adopts the model number: the chip of PCF 8574.
Further, each analog acquisition chip adopts the model as follows: chip of LTC 2991.
Drawings
FIG. 1 is a schematic diagram of a control circuit board for a space station online cabinet according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of an IIC extended GPIO chip in a control circuit board of a line cabinet for a space station according to an embodiment of the present invention;
FIG. 3 is a schematic circuit diagram of a control circuit for a space station in a control circuit board of a line cabinet according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of an analog acquisition chip in a control circuit board for a space station on-line cabinet according to an embodiment of the present invention.
Detailed Description
As shown in fig. 1, a control circuit board for a space station online cabinet according to an embodiment of the present invention includes: the IIC extended GPIO chip 20, the tri-state transceiver 30 and the at least one analog acquisition chip 10; each path of GPIO output by the IIC extended GPIO chip 20 is connected to the input end of the tri-state transceiver 30, an electronic fuse 40 is disposed in the power supply circuit of each to-be-controlled component, and each path of GPIO output by the tri-state transceiver 30 is respectively connected to one electronic fuse 40.
The IIC extended GPIO chip 20 is of the type: the IIC extended GPIO chip 20 is used for IO output control, and can output 8 paths of GPIOs, and 1-8 paths of GPIOs can be selected for control according to requirements. The tri-state transceiver 30 is of the type: the SNJ54ABTH16245WD chip, the tri-state transceiver 30 is used to isolate the GPIO signals output by the IIC extended GPIO chip 20 to protect the pins of the control chip. The tri-state transceiver 30 in this embodiment is a 16-bit co-directional tri-state transceiver 30, and has 8 input interfaces, each input interface is connected with one GPIO, so that the tri-state transceiver 30 can increase the driving capability of the GPIO, disable output by using Output Enable (OE), effectively isolate the bus, and prevent the GPIO from being in an unstable state at the moment of power-up to affect the state of the subsequent component.
Wherein, the analog quantity acquisition chip 10 adopts the chip of model LTC2991, adopts two analog quantity acquisition chips 10 in this embodiment, at least one analog quantity acquisition chip 10 includes: a first analog quantity acquisition chip 11 and a second analog quantity acquisition chip 12. The acquisition precision of the analog quantity acquisition chip 10 is 14 bits, each analog quantity acquisition chip 10 can acquire 8 paths of analog quantities, and the whole control circuit board can acquire 16 paths of analog quantities.
It should be noted that, the number of the analog acquisition chips 10 may be set according to the user's requirement, and is not limited to the number in the present embodiment. In addition, the types of the IIC extended GPIO chip 20, the tri-state transceiver 30 and the analog acquisition chip 10 are not limited, and can be changed according to the requirements, and only the corresponding functions of the embodiment need to be realized.
Each path of GPIO output by the IIC extended GPIO chip 20 is connected to the input end of the tri-state transceiver 30, an electronic fuse 40 is disposed in the power supply circuit of each to-be-controlled component, and each path of GPIO output by the tri-state transceiver 30 is respectively connected to one electronic fuse 40.
Each electronic fuse 40 is of the type: the TPS2421-1 chip, the electronic fuse 40 can control the output to be opened or closed through the enabling signal, the through-current capability can be configured through the external resistor, and the electronic fuse can be automatically closed when the current exceeds the limit, so that the damage of the components and the circuit is prevented.
Specifically, in this embodiment, 7 GPIOs are output, each GPIO corresponds to a component to be controlled, and the GPIOs output by the IIC extended GPIO chip 20 include: a first GPIO, a second GPIO, a third GPIO, a fourth GPIO, a fifth GPIO, a sixth GPIO and a seventh GPIO; a first observation camera +12v corresponding to the first GPIO, and a first electronic fuse 40 is arranged in a power supply circuit thereof; the to-be-controlled part component corresponding to the second GPIO is as follows: the LED display screen is +12V, and a second electronic fuse 40 is arranged in a power supply circuit of the LED display screen; the to-be-controlled part component corresponding to the third GPIO is as follows: the LED display screen is +5V, and a third electronic fuse 40 is arranged in a power supply circuit of the LED display screen; the to-be-controlled part component corresponding to the fourth GPIO is as follows: the front acquisition box is +12V, and a fourth electronic fuse 40 is arranged in a power supply circuit of the front acquisition box; the to-be-controlled part component corresponding to the fifth GPIO is as follows: the front acquisition box is +5V, and a fifth electronic fuse 40 is arranged in a power supply circuit of the front acquisition box; the to-be-controlled part component corresponding to the sixth GPIO is as follows: load resource interface +12V, there is a sixth electronic fuse 40 in its power supply circuit; the to-be-controlled part component corresponding to the seventh GPIO is as follows: the second observation camera is +12v, and a seventh electronic fuse 40 is provided in a power supply circuit thereof.
The IIC extended GPIO chip 20 is configured to: according to the control instruction, a target GPIO signal is sent to the electronic fuse 40 corresponding to the target to-be-controlled component through the tri-state transceiver 30, so that the electronic fuse 40 corresponding to the target to-be-controlled component is controlled to be opened or closed through the target GPIO signal, and the power supply circuit of the target to-be-controlled component is controlled to be opened or closed.
The circuit principle corresponding to the IIC extended GPIO chip 20 is shown in fig. 2. The control instruction can control the on/off of the power supply circuit of at least one path of to-be-controlled part component. The target to-be-controlled part component is as follows: at least one path of to-be-controlled part component which is required to be controlled by a user; for example, when the user needs to control the components of the portion to be controlled are: when the front acquisition box is +12V and the LED display screen is +5V, the target to-be-controlled part assembly is as follows: front-mounted collection box +12V and LED display screen +5V.
It should be noted that, the opening of the electronic fuse 40 corresponds to the connection of the power supply circuit, and the closing of the electronic fuse 40 corresponds to the disconnection of the power supply circuit.
Each analog acquisition chip 10 is configured to: and collecting a target analog quantity signal.
The target analog signal is an analog signal acquired after the analog acquisition chip 10 sends out an acquisition signal. Types of analog signals include, but are not limited to: voltage telemetry analog signals, temperature analog signals, and the like.
Preferably, an IIC monitor 50 is also provided in the power supply circuit of each of the to-be-controlled components.
The IIC monitor 50 is of the type: chip of LTC 2945.
Specifically, the circuit principle of the control circuit is as shown in fig. 3, the TPS2421-1 chip is used for controlling the switch of the component, providing 5V or 12V voltage output, and the LTC2945 chip is used for voltage and current collection of the power supply circuit.
Each IIC monitor 50 is for: and collecting the current value and the current voltage value in the corresponding power supply circuit in real time.
Preferably, an operational amplifier chip 60 is disposed in each analog quantity acquisition chip 10 for acquiring analog quantity.
The operational amplifier chip 60 adopts the following model: OPA2365 chip.
Each op-amp chip 60 is configured to: the method comprises the steps of receiving original analog signals acquired by corresponding analog acquisition chips 10, carrying out follow-up processing on the original analog signals to obtain target analog signals and sending the target analog signals to the corresponding analog acquisition chips 10.
The original analog quantity signal is: after the analog acquisition chip 10 sends out the acquisition signal, the returned analog signal is not processed at all, and if the analog signal is directly sent to the analog acquisition chip 10, the chip may be damaged and part of the analog may be lost.
Specifically, the circuit principle of the analog quantity acquisition chip 10 is shown in fig. 4. The operational amplifier chip 60 can carry out following processing on external analog quantity, the processed analog quantity is input to the corresponding analog quantity acquisition chip 10, the operational amplifier chip 60 can isolate external analog quantity signals from the analog quantity acquisition chip 10, the acquisition chip is protected from being damaged, meanwhile, the operational amplifier chip has excellent following characteristics, and the loss of analog quantity precision is reduced.
Preferably, the method further comprises: a first IIC interface 91 and a second IIC interface 92.
In this embodiment, the at least one IIC monitor 50 includes: the first IIC monitor 51 (corresponding to the power supply circuit where the first observation camera+12v is located), the second IIC monitor 52 (corresponding to the power supply circuit where the LED display screen+12v is located), the third IIC monitor 53 (corresponding to the power supply circuit where the LED display screen+5v is located), the fourth IIC monitor 54 (corresponding to the power supply circuit where the front acquisition box+12v is located), and the fifth IIC monitor 55 (corresponding to the power supply circuit where the front acquisition box+5v is located). The first IIC interface 91 is connected to the first analog acquisition chip 10, the second analog acquisition chip 10, the first IIC monitor 51, the second IIC monitor 52, the third IIC monitor 53, the fourth IIC monitor 54, and the fifth IIC monitor 55, respectively.
In addition, the at least one IIC monitor 50 further includes: a sixth IIC monitor 56 (corresponding to the power supply circuit where the load resource interface +12v is located) and a seventh IIC monitor 57 (corresponding to the power supply circuit where the second observation camera +12v is located). Wherein the second IIC interface 92 connects the sixth IIC monitor 56, the seventh IIC monitor 57, and the IIC extended GPIO chip 20, respectively.
Each analog acquisition chip 10 is specifically configured to: the target analog signal is collected according to the analog collection command received by the first IIC interface 91.
The first IIC interface 91 is configured to: and receiving and sending analog quantity acquisition instructions to the first analog quantity acquisition chip 11 and the second analog quantity acquisition chip 12, so that the first analog quantity acquisition chip 11 and the second analog quantity acquisition chip 12 acquire corresponding analog quantities according to the analog quantity acquisition instructions.
Wherein the first IIC interface 91 is further configured to: and receiving and transmitting a first circuit monitoring instruction to the first IIC monitor 51, the second IIC monitor 52, the third IIC monitor 53, the fourth IIC monitor 54 and the fifth IIC monitor 55, respectively, so that the first IIC monitor 51, the second IIC monitor 52, the third IIC monitor 53, the fourth IIC monitor 54 and the fifth IIC monitor 55 collect a current value and a current voltage value of a corresponding power supply circuit according to the first circuit monitoring instruction, respectively.
The IIC extended GPIO chip 20 is specifically configured to: and controlling the on/off of the power supply circuit of the target to-be-controlled part component according to the control instruction received by the second IIC interface 92.
Wherein the second IIC interface 92 is further configured to: and receiving and sending the control instruction to the IIC expansion GPIO chip 20, so that the IIC expansion GPIO chip 20 controls the on or off of a power supply circuit of the target to-be-controlled part component.
Wherein the second IIC interface 92 is for: and receiving and transmitting a second circuit monitoring instruction to the sixth IIC monitor 56 and the seventh IIC monitor 57, so that the sixth IIC monitor 50 and the seventh IIC monitor 57 respectively collect the current value and the current voltage value of the corresponding power supply circuit according to the second circuit monitoring instruction.
It should be noted that, two paths of IIC interfaces are used for communication and control, so that the number of single path IIC mounted chips can be reduced, and the reliability of communication can be improved.
Preferably, the method further comprises: the end of the SCL line and the end of the SDA line of the circuit corresponding to the first IIC interface 91 are respectively applied with pull-up voltages.
It should be noted that, the mounting of the circuit corresponding to the first IIC interface 91 is more from the chip, in order to prevent the quality of the IIC signal from being affected due to the excessive parasitic capacitance, a 4.7K resistor is pulled up to 3.3V at the end of the SCL line and the SDA line of the circuit corresponding to the first IIC interface 91, so as to ensure the reliability of communication.
Preferably, the method further comprises: and a power chip 70, wherein the first input power supplies power to the power chip 70.
The power chip 70 adopts the following signals: TPS74401 chip. In this embodiment, the first input power is 5V.
The power chip 70 is configured to: the original input voltage is converted into the voltage adapted to each analog acquisition chip 10, each IIC monitor 50 and the IIC extended GPIO chip 20, respectively, to power each analog acquisition chip 10, each IIC monitor 50 and the IIC extended GPIO chip 20, respectively.
In the present embodiment, the power supply chip 70 is used to convert the input raw input voltage (5V) to 3.3V, to power each analog acquisition chip 10, each IIC monitor 50, and IIC extended GPIO chip 20, respectively, while providing a pull-up voltage for IIC communications.
Preferably, the method further comprises: the VPX connector 80, the first IIC interface 91 and the second IIC interface 92 are both disposed on the VPX connector 80.
The VPX connector 80 is for: interfaces are provided for the input power supply, each analog signal and each component of the portion to be controlled.
The VPX connector 80 is model 6450849-9, among other things. As shown in table 1, P1 and P2 are the first input power 5V, and P3 and P4 are the second input power 12V; LP 1-LP 7 are load resource interface +12V output, LED display screen +5V output, front acquisition box +5V output, observation camera A +12V output, front acquisition box +12V output, observation camera B +12V output, LED display screen +12V output; the SIGNAL pin is for 2 IIC communications and 16 analog inputs.
Table 1 definition table for each node in VPX connector 80
The technical scheme of the embodiment can be suitable for various scenes needing analog quantity acquisition and part assembly control, and can acquire analog quantities such as voltage remote measurement and temperature while realizing the power-on and power-off control of the low-power part assembly of the online cabinet, so that the electronic state of the online maintenance operation support unit of the online cabinet can be monitored in real time.
In the description provided herein, numerous specific details are set forth. It will be appreciated, however, that embodiments of the invention may be practiced without such specific details. Similarly, in the above description of exemplary embodiments of the invention, various features of embodiments of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. Wherein the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, third, etc. do not denote any order. These words may be interpreted as names. The steps in the above embodiments should not be construed as limiting the order of execution unless specifically stated.
Claims (10)
1. A control circuit board for a space station on-line cabinet, comprising: the IIC expansion GPIO chip (20), the tri-state transceiver (30) and the at least one analog quantity acquisition chip (10); each path of GPIO output by the IIC extended GPIO chip (20) is connected with the input end of the tri-state transceiver (30), an electronic fuse (40) is arranged in a power supply circuit of each to-be-controlled part component, and each path of GPIO output by the tri-state transceiver (30) is respectively used for being connected with one electronic fuse (40);
the IIC extended GPIO chip (20) is used for: according to a control instruction, a target GPIO signal is sent to an electronic fuse (40) corresponding to a target to-be-controlled component through the tri-state transceiver (30), so that the electronic fuse (40) corresponding to the target to-be-controlled component is controlled to be opened or closed through the target GPIO signal, and the power supply circuit of the target to-be-controlled component is controlled to be turned on or off;
each analog quantity acquisition chip (10) is used for: and collecting a target analog quantity signal.
2. A control circuit board for a space station online cabinet according to claim 1, characterized in that an IIC monitor (50) is also provided in the power supply circuit of each component of the section to be controlled;
each IIC monitor (50) is for: and collecting the current value and the current voltage value in the corresponding power supply circuit in real time.
3. A control circuit board for a space station on-line cabinet according to claim 2, characterized in that an op-amp chip (60) is provided in each analog acquisition chip (10) for the analog acquisition circuit.
4. A control circuit board for a space station online cabinet according to claim 3, further comprising: a first IIC interface (91) and a second IIC interface (92);
each analog quantity acquisition chip (10) is specifically used for: acquiring the target analog quantity signal according to the analog quantity acquisition instruction received by the first IIC interface (91);
the IIC extended GPIO chip (20) is specifically used for: and controlling the on/off of a power supply circuit of the target to-be-controlled part component according to the control instruction received by the second IIC interface (92).
5. A control circuit board for an on-line cabinet of a space station as recited in claim 4, further comprising: pull-up resistors are respectively applied at the tail end of an SCL line and the tail end of an SDA line of a circuit corresponding to the first IIC interface (91).
6. A control circuit board for an on-line cabinet for a space station according to any one of claims 2-5, further comprising: a power chip (70), a first input power supply supplying power to the power chip (70);
the power chip (70) is configured to: the original input voltage is respectively converted into the voltage which is adapted by each analog quantity acquisition chip (10), each IIC monitor (50) and the IIC expansion GPIO chip (20), so as to respectively supply power to each analog quantity acquisition chip (10), each IIC monitor (50) and the IIC expansion GPIO chip (20).
7. A control circuit board for a space station cabinet according to claim 4 or 5, further comprising: -a VPX connector (80), the first IIC interface (91) and the second IIC interface (92) being both provided on the VPX connector (80);
the VPX connector (80) is for: interfaces are provided for the input power supply, each analog signal and each component of the portion to be controlled.
8. A control circuit board for a space station online cabinet according to claim 1, wherein the plurality of to-be-controlled section assemblies comprise: load resource interface, first LED display screen, leading collection box, first observation camera, second LED display screen.
9. The control circuit board for an online cabinet of a space station according to claim 1, wherein the IIC extended GPIO chip (20) is of the type: the chip of PCF 8574.
10. A control circuit board for an on-line cabinet of a space station according to claim 1, characterized in that each analog acquisition chip (10) is of the type: chip of LTC 2991.
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| CN102591244A (en) * | 2012-03-26 | 2012-07-18 | 中国科学院自动化研究所 | Bus-based input/output (IO) acquisition and control extending device |
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| CN202166676U (en) * | 2011-06-23 | 2012-03-14 | 同济大学 | Novel power battery simulation device |
| GB2562824B (en) * | 2016-12-15 | 2022-04-13 | Pismo Labs Technology Ltd | Methods and systems for providing electricity according to power policy |
| CN108732438A (en) * | 2017-04-27 | 2018-11-02 | 研祥智能科技股份有限公司 | One kind being used for the measurement jig and method of general purpose I/O port |
| CN107942263A (en) * | 2017-10-12 | 2018-04-20 | 芜湖扬宇机电技术开发有限公司 | A kind of real-time monitoring device of Spacecraft TT＆C power supply |
| CN109696835A (en) * | 2017-10-23 | 2019-04-30 | 中国科学院空间应用工程与技术中心 | The system and method that the analogue data of space station scientific experiment cupboards is controlled |
| CN110739661B (en) * | 2019-09-26 | 2022-02-22 | 苏州浪潮智能科技有限公司 | Overcurrent protection device and board card |
| CN214896384U (en) * | 2021-05-20 | 2021-11-26 | 杭州古德微机器人有限公司 | Integrated expansion board based on raspberry group |
| CN114779117A (en) * | 2022-04-19 | 2022-07-22 | 中汽研（天津）汽车工程研究院有限公司 | Automobile wire harness short circuit and overcurrent test system and method |
| CN115395478A (en) * | 2022-08-08 | 2022-11-25 | 广州高新兴机器人有限公司 | Protection circuit of robot power supply system |
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| CN102591244A (en) * | 2012-03-26 | 2012-07-18 | 中国科学院自动化研究所 | Bus-based input/output (IO) acquisition and control extending device |
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