CN115378486A - Low-voltage direct-current two-bus repeater and working method thereof - Google Patents
Low-voltage direct-current two-bus repeater and working method thereof Download PDFInfo
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- CN115378486A CN115378486A CN202211308586.9A CN202211308586A CN115378486A CN 115378486 A CN115378486 A CN 115378486A CN 202211308586 A CN202211308586 A CN 202211308586A CN 115378486 A CN115378486 A CN 115378486A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40006—Architecture of a communication node
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40006—Architecture of a communication node
- H04L12/40013—Details regarding a bus controller
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40006—Architecture of a communication node
- H04L12/40045—Details regarding the feeding of energy to the node from the bus
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
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- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
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Abstract
The application belongs to the technical field of relay circuits, and particularly relates to a low-voltage direct-current two-bus repeater and a working method thereof, wherein a relay circuit is adopted, and the relay circuit comprises an uplink circuit, a bus controller and a downlink circuit; the uplink circuit comprises an uplink receiving circuit and an uplink sending circuit, and the uplink receiving circuit is connected with the uplink sending circuit in parallel; the bus controller is respectively connected with the uplink receiving circuit, the uplink sending circuit and the downlink circuit; the downlink circuit comprises a downlink transmitting circuit and a downlink receiving circuit.
Description
Technical Field
The application belongs to the technical field of relay lines, and particularly relates to a low-voltage direct-current two-bus repeater and a working method thereof.
Background
The statements in this section merely provide background information related to the present application and may not constitute prior art.
Compared with the traditional field bus, the low-voltage direct-current bus has the advantages that a power supply line and a communication line are combined into a whole, and the purpose that power supply and communication share one bus is achieved.
According to the inventor, when the low-voltage direct-current two-bus is applied in a high-power long-distance occasion, the following problems exist: when the loop circuit is long and has large inductance and large load current, the communication waveform is distorted due to the inductance effect, and the bus communication is further influenced; in the conventional four-wire system communication technology, since the communication bus only plays a role of communication and a special power supply bus supplies power to the communication bus, the relay scheme is mature and is widely applied. However, under the condition of sharing a bus for power supply and communication, no special external power supply is used for supplying power to the repeater and the repeater backend equipment, so that no scheme is provided for solving the problems at present.
Disclosure of Invention
In order to solve the problems, the application provides a low-voltage direct-current two-bus repeater and a working method thereof, the repeater is connected to a position where a bus is not distorted or is slightly distorted and not enough to cause communication errors, the repeater analyzes and forwards a received signal, so that the communication distance and the node number are prolonged, and the problem that the communication cannot be performed due to waveform distortion caused by line inductance in the case of high-power long-distance application of a low-voltage direct-current two-bus is further solved.
According to some embodiments, a first aspect of the present application provides a low-voltage dc two-bus repeater, which adopts the following technical solutions:
a low-voltage direct-current two-bus repeater adopts a repeater circuit, wherein the repeater circuit comprises an uplink circuit, a bus controller and a downlink circuit;
the uplink circuit comprises an uplink receiving circuit and an uplink sending circuit, and the uplink receiving circuit is connected with the uplink sending circuit in parallel;
the bus controller is respectively connected with the uplink receiving circuit, the uplink sending circuit and the downlink circuit;
the downlink circuit comprises a downlink transmitting circuit and a downlink receiving circuit.
As a further technical limitation, the relay circuit further includes a tank circuit, the tank circuit includes a first diode and a first capacitor, an anode of the first diode is connected to a collector of the return control triode, a cathode of the first diode is connected to an anode of the first capacitor, and a cathode of the first capacitor is connected to the return current limiting resistor.
Furthermore, the uplink receiving circuit comprises a first voltage-stabilizing tube and a detection divider resistor which are connected in parallel, the first voltage-stabilizing tube is connected in parallel with two input ends of the relay circuit, the uplink sending circuit comprises a return control triode and a return current-limiting resistor, a collector of the return control triode is connected with one end of the uplink receiving circuit, and an emitter of the return control triode is connected with the other end of the uplink receiving circuit through the return current-limiting resistor.
Further, the detection voltage-dividing resistor includes a first detection voltage-dividing resistor and a second detection voltage-dividing resistor, and the first detection voltage-dividing resistor and the second detection voltage-dividing resistor divide the input level and input the level signal after voltage division conversion into the bus controller.
Further, the bus controller comprises a microcontroller and a power supply unit, and the microcontroller is electrically connected with the power supply unit; the microcontroller comprises an uplink receiving unit, an uplink sending unit, a downlink sending unit and a downlink receiving unit.
Further, the downlink transmission circuit comprises a thyristor, a first triode, a first resistor, a second resistor and a second triode; the emitter of the thyristor is connected with the cathode of the first diode, the collector of the thyristor is connected with the emitter of the first triode, and the base of the thyristor is connected with one end of the downlink sending unit.
Furthermore, an emitter of the first triode is respectively connected with one end of the second resistor and a collector of the thyristor, a collector of the first triode is respectively connected with a base of the second triode and the other end of the downlink transmitting unit, and a base of the first triode is connected with one end of the first resistor; the other end of the first resistor is respectively connected with the other end of the second resistor and the emitting electrode of the second triode.
Furthermore, the downlink receiving circuit comprises a sampling resistor, a second diode and a second voltage regulator tube, wherein the anode of the second diode is respectively connected with one end of the sampling resistor and one end of the downlink receiving unit, the cathode of the second diode is connected with the emitter of the first triode and the collector of the thyristor, and the other end of the sampling resistor is connected with the other end of the downlink receiving unit; a collector of the second triode is connected with one end of the second voltage-stabilizing tube; and an emitting electrode of the first triode is connected with one end of the second voltage-stabilizing tube, and the second voltage-stabilizing tube is connected in parallel with two output ends of the relay circuit.
Furthermore, one end of the power supply unit is respectively connected with the cathode of the first diode, the anode of the first capacitor and the cathode of the second diode, and the other end of the power supply unit is connected with the cathode of the first capacitor and one end of the return current limiting resistor far away from the emitter of the return control triode; the uplink sending unit is connected with the base electrode of the feedback control triode, and the uplink receiving unit is connected with the position where the first detection divider resistor and the second detection divider resistor are connected.
According to some embodiments, a second aspect of the present application provides a method for operating a low-voltage dc two-bus repeater, where the low-voltage dc two-bus repeater provided in the first aspect is adopted, and the following technical solutions are adopted:
a working method of a low-voltage direct-current two-bus repeater comprises the following steps:
the uplink circuit receives the bus waveform, and outputs the bus waveform to the downlink circuit after being remodulated by the bus controller, and the low level width is widened to the normal signal width;
the downlink circuit receives the downlink return signal, and the downlink return signal is analyzed by the bus controller, modulated and output by the uplink circuit and returned to the bus controller.
Compared with the prior art, the beneficial effect of this application is:
through the structural improvement of the relay circuit, the relay can widen the condition of waveform low level width reduction caused by inductance effect to a normal communication interval through the relay low level width again according to the actual waveform test; the communication distance of the single-loop 200W load can be doubled according to field test; reliable return can be realized under the working condition of single-loop full load of 200W according to the field test condition; according to the field application, the repeater circuit can be directly connected in series in a bus without additional power supply, and is easy to implement.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the application, and the description of the exemplary embodiments and illustrations of the application are intended to explain the application and are not intended to limit the application.
Fig. 1 is a schematic diagram of a topology of a low-voltage dc two-bus repeater in a first embodiment of the present application;
fig. 2 is a schematic diagram illustrating a comparison between waveforms of an input signal and an output signal of a low-voltage dc two-bus repeater according to a first embodiment of the present application;
fig. 3 is a flowchart of a method for operating a low-voltage dc two-bus repeater according to a second embodiment of the present application;
the system comprises an uplink circuit 1, an uplink circuit 2, an energy storage circuit 3, a bus controller 4 and a downlink circuit.
Detailed Description
The present application will be further described with reference to the following drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In the present application, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only terms of relationships determined for convenience in describing structural relationships of the components or elements of the present application, and are not intended to refer to any components or elements of the present application, and are not to be construed as limiting the present application.
In this application, terms such as "fixedly connected," "connected," and the like should be understood broadly, and mean either a fixed connection or an integrally or detachably connected connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present application can be determined according to specific situations by persons skilled in the relevant scientific research or technical field, and the terms cannot be understood as limiting the present application.
The embodiments and features of the embodiments in the present application may be combined with each other without conflict.
Example one
The first embodiment of the present application introduces a low-voltage dc two-bus repeater.
The low-voltage direct-current two-bus repeater shown in fig. 1 comprises an uplink circuit 1, an energy storage circuit 2, a bus controller 3 and a downlink circuit 4;
the uplink circuit 1 comprises an uplink receiving circuit and an uplink transmitting circuit; the uplink receiving circuit comprises a first voltage-stabilizing tube D1 and a detection divider resistor which are mutually connected in parallel, the first voltage-stabilizing tube D1 is connected in parallel with two input ends of the relay circuit, the detection divider resistor comprises a first detection divider resistor R1 and a second detection divider resistor R2, the voltage division of the input level is carried out through the first detection divider resistor R1 and the second detection divider resistor R2, and the level signal after voltage division conversion is input into the bus controller;
the energy storage circuit 2 comprises a first diode D2 and a first capacitor C1, wherein the anode of the first diode D2 is connected with the collector electrode of the return control triode T1, the cathode of the first diode D2 is connected with the anode of the first capacitor C1, and the cathode of the first capacitor C1 is connected with one end of a return current limiting resistor R3 far away from the emitter electrode of the return control triode T1;
the bus controller 3 comprises a microcontroller and a power supply unit, wherein the microcontroller is electrically connected with the power supply unit and comprises an uplink receiving unit, an uplink transmitting unit, a downlink transmitting unit and a downlink receiving unit; one end of the power supply unit is respectively connected with the cathode of the first diode T2, the anode of the first capacitor C1 and the cathode of the second diode D3, and the other end of the power supply unit is connected with the cathode of the first capacitor C1 and one end of the return current limiting resistor R3 far away from the emitting electrode of the return control triode T1; the uplink sending unit is connected with the base electrode of the feedback control triode T1, and the uplink receiving unit is connected with the position where the first detection divider resistor R1 and the second detection divider resistor R2 are connected;
the downlink circuit 4 comprises a downlink transmitting circuit and a downlink receiving circuit; the downlink transmission circuit comprises a thyristor Q1, a first triode T2, a first resistor R5, a second resistor R6 and a second triode T3; the emitter of the first triode T2 is respectively connected with one end of a second resistor R6 and the collector of the thyristor Q1, the collector of the first triode T2 is respectively connected with the base of a second triode T3 and the other end of the downlink sending unit, and the base of the first triode T5 is connected with one end of a first resistor R2; the downlink receiving circuit comprises a sampling resistor R4, a second diode D3 and a second voltage-regulator tube D4, wherein the anode of the second diode D3 is respectively connected with one end of the sampling resistor R4 and one end of the downlink receiving unit, the cathode of the second diode D3 is connected with the emitter of the first triode T2 and the collector of the thyristor Q1, and the other end of the sampling resistor R4 is connected with the other end of the downlink receiving unit; the collector of the second triode T3 is connected with one end of a second voltage-regulator tube D4; an emitting electrode of the first triode T2 is connected with one end of a second voltage-regulator tube D4, and the second voltage-regulator tube D4 is connected in parallel with two output ends of the relay circuit;
specifically, under the condition of long-distance large current, the inductance of a loop is large, the inductance continues current when a bus modulation signal suddenly changes at a falling edge, and the bus level cannot jump quickly, so that the width of the low level is reduced, and the communication receiving and returning are influenced; the relay circuit can remodulate the received uplink bus waveform and output the remodulated uplink bus waveform to downlink, so that the low level width is widened to the normal signal width; the received downlink return signal is analyzed and then returned through the uplink sending circuit, and the repeater is installed at the position where the loop can normally communicate, so that the inductive follow current is blocked by the repeater, and the effective return signal can be uploaded to a microcontroller in the bus controller. The input and output waveforms and the effect diagram of the repeater are shown in fig. 2.
The level signal of 36V is converted into a TTL level signal V by the voltage division action of a first detection divider resistor R1 and a second detection divider resistor R2 TTL = R2/(R1 + R2) × 36V into bus controller; converting the obtained TTL return signal into a current signal through switching on and switching off of a return control triode T1, uploading the current signal to an upper computer through a master station, pulling current from the master station when the return control triode T1 is switched on, stopping pulling the current when the return control triode T1 is switched off, and reading the signal through current-voltage conversion by the master station; the energy storage circuit is used for providing stable output voltage for the repeater and a rear end load; the first capacitor C1 is used for filtering the waveform of the uplink bus and outputting the waveform as a stable voltage signal; the first diode D2 is used for eliminating the influence of a rear-end voltage band on front-end sampling; the bus controller is used for communication analysis and forwarding control; the uplink receiving unit analyzes the received uplink signal TTL voltage signal and outputs the analyzed signal to downlink equipment through the downlink sending unit; downlink receptionThe unit analyzes the received downlink equipment return signal and then returns the signal to the upper computer through the uplink sending unit; the downlink circuit is used for sending the received uplink issued signal to the downlink terminal equipment and receiving and analyzing a return signal of the terminal equipment and then returning the return signal to the upper computer through the uplink sending unit; under the action of a downlink transmission circuit, the thyristor Q1, the first triode T2 and the second triode T3 are controlled to be turned on and off according to a time sequence, when a low level is transmitted, the thyristor Q1 is turned off, the second triode T3 is turned on, the first triode T2 is turned on after a current limiting value is reached, and the second triode T3 is turned off; when a high level is sent, the thyristor Q1 is switched on, the first triode T2 and the second triode T3 are both cut off, and the high-level voltage of the input voltage is directly output, so that the TTL signal is modulated into a bus voltage waveform; the return current loop signal is converted into a voltage signal by the sampling resistor R4, the current signal is converted into a voltage signal by the sampling resistor R4, the voltage signal enters the controller for analog-digital conversion, and the second diode D3 is used for preventing the bus voltage waveform from entering the return analysis unit.
In the embodiment, through the structural improvement of the relay circuit, the relay can widen the condition of waveform low level width reduction caused by inductance effect to a normal communication interval through the relay low level width again according to the actual waveform test; the single-loop 200W load communication distance can be doubled according to field test; according to the field test condition, reliable return can be realized under the working condition of single-loop full load of 200W; according to the field application, the repeater circuit can be directly connected in series in a bus without additional power supply, and is easy to implement.
Example two
On the basis of the low-voltage dc two-bus repeater introduced in the first embodiment, a working method of the low-voltage dc two-bus repeater is introduced in the second embodiment of the present application.
A method for operating a low-voltage dc two-bus repeater as shown in fig. 3 includes:
the uplink circuit receives the bus waveform, and outputs the bus waveform to the downlink circuit after being remodulated by the bus controller, and the low level width is widened to the normal signal width; in particular, the method comprises the following steps of,
the uplink circuit receives the distorted voltage waveform in the bus, the uplink receiving unit of the bus controller analyzes and checks the waveform, then processed correct data is transmitted to the downlink coding transmitting unit, the downlink coding transmitting unit remodulates the data into voltage signals, and transmits the low level of the data according to the width of normal signals;
the downlink circuit receives downlink return signals, and the downlink return signals are analyzed by the bus controller, modulated and output by the uplink circuit and returned to the bus controller; in particular, the method comprises the following steps of,
the downlink return analysis unit receives a current loop return signal of the bus controller, converts the current signal into a voltage signal through the sampling resistor, enters the bus controller for analog-digital conversion, and after the conversion is completed, the correct data is modulated by the uplink return unit and then is returned to the bus controller.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Although the embodiments of the present application have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present application, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive effort by those skilled in the art.
Claims (10)
1. A low-voltage direct-current two-bus repeater is characterized in that a repeater circuit is adopted, and the repeater circuit comprises an uplink circuit, a bus controller and a downlink circuit;
the uplink circuit comprises an uplink receiving circuit and an uplink sending circuit, and the uplink receiving circuit is connected with the uplink sending circuit in parallel;
the bus controller is respectively connected with the uplink receiving circuit, the uplink sending circuit and the downlink circuit;
the downlink circuit comprises a downlink transmitting circuit and a downlink receiving circuit.
2. A low voltage dc two-bus repeater as recited in claim 1, wherein said repeater further comprises a tank circuit, said tank circuit comprising a first diode and a first capacitor, an anode of said first diode being connected to a collector of said return control transistor, a cathode of said first diode being connected to an anode of said first capacitor, and a cathode of said first capacitor being connected to said return current limiting resistor.
3. A low voltage dc two-bus repeater as claimed in claim 2, wherein the uplink receiving circuit comprises a first voltage regulator and a detecting divider resistor connected in parallel, the first voltage regulator is connected in parallel to two input terminals of the repeater circuit, the uplink transmitting circuit comprises a feedback control triode and a feedback current limiting resistor, a collector of the feedback control triode is connected to one end of the uplink receiving circuit, and an emitter of the feedback control triode is connected to the other end of the uplink receiving circuit through the feedback current limiting resistor.
4. A low voltage dc two-bus repeater as claimed in claim 3, wherein said detection voltage dividing resistor comprises a first detection voltage dividing resistor and a second detection voltage dividing resistor, and the voltage division of the input level is performed by said first detection voltage dividing resistor and said second detection voltage dividing resistor, and the voltage-divided level signal is inputted to the bus controller.
5. The low voltage dc two bus repeater of claim 4, wherein said bus controller comprises a microcontroller and a power supply unit, said microcontroller being electrically connected to said power supply unit; the microcontroller comprises an uplink receiving unit, an uplink sending unit, a downlink sending unit and a downlink receiving unit.
6. The low voltage dc two bus repeater of claim 5, wherein the downstream transmission circuit comprises a thyristor, a first transistor, a first resistor, a second resistor, and a second transistor; the emitter of the thyristor is connected with the cathode of the first diode, the collector of the thyristor is connected with the emitter of the first triode, and the base of the thyristor is connected with one end of the downlink sending unit.
7. A low voltage dc two-bus repeater as claimed in claim 6, wherein the emitter of the first transistor is connected to one end of the second resistor and the collector of the thyristor, respectively, the collector of the first transistor is connected to the base of the second transistor and the other end of the downstream transmitting unit, respectively, and the base of the first transistor is connected to one end of the first resistor; the other end of the first resistor is respectively connected with the other end of the second resistor and the emitter of the second triode.
8. The low-voltage direct-current two-bus repeater as claimed in claim 7, wherein the downlink receiving circuit comprises a sampling resistor, a second diode and a second voltage regulator tube, wherein an anode of the second diode is respectively connected with one end of the sampling resistor and one end of the downlink receiving unit, a cathode of the second diode is connected with an emitter of the first triode and a collector of the thyristor, and the other end of the sampling resistor is connected with the other end of the downlink receiving unit; the collector of the second triode is connected with one end of the second voltage-regulator tube; and an emitting electrode of the first triode is connected with one end of the second voltage-stabilizing tube, and the second voltage-stabilizing tube is connected in parallel with two output ends of the relay circuit.
9. A low voltage dc two-bus repeater as claimed in claim 8, wherein one end of said power supply unit is connected to the cathode of said first diode, the anode of said first capacitor and the cathode of said second diode, respectively, and the other end of said power supply unit is connected to the cathode of said first capacitor and one end of said return current limiting resistor remote from the emitter of said return control transistor; the uplink sending unit is connected with the base electrode of the feedback control triode, and the uplink receiving unit is connected with the position where the first detection divider resistor and the second detection divider resistor are connected.
10. A method of operating a low voltage dc two bus repeater using a low voltage dc two bus repeater as claimed in any one of claims 1 to 9, comprising:
the uplink circuit receives the bus waveform, and outputs the bus waveform to the downlink circuit after being remodulated by the bus controller, and the low level width is widened to the normal signal width;
the downlink circuit receives the downlink return signal, and the downlink return signal is analyzed by the bus controller, modulated and output by the uplink circuit and returned to the bus controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211308586.9A CN115378486B (en) | 2022-10-25 | 2022-10-25 | Low-voltage direct-current two-bus repeater and working method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211308586.9A CN115378486B (en) | 2022-10-25 | 2022-10-25 | Low-voltage direct-current two-bus repeater and working method thereof |
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| CN115378486B CN115378486B (en) | 2023-02-03 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202309703U (en) * | 2011-10-26 | 2012-07-04 | 成都力拓电控技术有限公司 | Signal repeater controlled by hydraulic support bus |
| CN202424756U (en) * | 2012-01-06 | 2012-09-05 | 广州日滨科技发展有限公司 | Controller area network (CAN) repeater |
| CN209462397U (en) * | 2019-01-28 | 2019-10-01 | 深圳市壹厘米科技有限公司 | A kind of CAN relay of band buffering |
| CN112491444A (en) * | 2020-11-16 | 2021-03-12 | 广州保得威尔电子科技股份有限公司 | Two bus signal repeaters |
| CN213342251U (en) * | 2020-11-16 | 2021-06-01 | 广州保得威尔电子科技股份有限公司 | Two-bus relay code sending circuit |
-
2022
- 2022-10-25 CN CN202211308586.9A patent/CN115378486B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202309703U (en) * | 2011-10-26 | 2012-07-04 | 成都力拓电控技术有限公司 | Signal repeater controlled by hydraulic support bus |
| CN202424756U (en) * | 2012-01-06 | 2012-09-05 | 广州日滨科技发展有限公司 | Controller area network (CAN) repeater |
| CN209462397U (en) * | 2019-01-28 | 2019-10-01 | 深圳市壹厘米科技有限公司 | A kind of CAN relay of band buffering |
| CN112491444A (en) * | 2020-11-16 | 2021-03-12 | 广州保得威尔电子科技股份有限公司 | Two bus signal repeaters |
| CN213342251U (en) * | 2020-11-16 | 2021-06-01 | 广州保得威尔电子科技股份有限公司 | Two-bus relay code sending circuit |
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| Publication number | Publication date |
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| CN115378486B (en) | 2023-02-03 |
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