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CN-224205090-U - Optical switching module and control system

CN224205090UCN 224205090 UCN224205090 UCN 224205090UCN-224205090-U

Abstract

The utility model discloses an optical switching module and a control system, wherein the optical switching module comprises a first optical switching unit and a plurality of second optical switching units, each of the first optical switching units and the second optical switching units respectively comprises at least one group of photoelectric converters, each photoelectric converter is used for realizing bidirectional conversion between an electric signal and an optical signal and is used for monitoring the electric signal and generating a state signal used for representing whether the electric signal is interfered or not, and the first optical switching unit further comprises a power supply unit which is electrically connected with the photoelectric converters and provides a first power supply voltage for all the photoelectric converters. The control system comprises a controller, a driver and an optical switching module connected between the controller and the driver. The utility model can reduce the complexity of a communication system between the controller and the driver, the optical switching module only performs photoelectric signal conversion and monitors whether the input electric signal is interfered or not, and communication with the CPU is not needed.

Inventors

  • DONG FEIYU
  • Xi Lefei
  • YUAN ZAISONG

Assignees

  • 上海铼钠克数控科技有限公司

Dates

Publication Date
20260505
Application Date
20250507

Claims (10)

  1. 1. An optical switching module is characterized by comprising a first optical switching unit and a plurality of second optical switching units; The first optical switching units and the second optical switching units respectively comprise at least one group of photoelectric converters, wherein the photoelectric converters are used for realizing bidirectional conversion between electric signals and optical signals and monitoring the electric signals and generating state signals for representing whether the electric signals are interfered or not; the first optical switching unit further comprises a power supply unit, wherein the power supply unit is electrically connected with the photoelectric converters and provides a first power supply voltage for all the photoelectric converters.
  2. 2. The optical switching module according to claim 1, wherein the photoelectric converter includes a first signal conversion unit, a second signal conversion unit, a photoelectric conversion unit, and an interference detection unit, the electrical signal includes a first differential signal and a second differential signal, and the optical signal includes a first optical signal and a second optical signal; The first signal conversion unit is used for converting a first differential signal into a first single-ended signal and converting a second single-ended signal into a second differential signal; the second signal conversion unit is connected with the first signal conversion unit and is used for converting the first single-ended signal into a first low-voltage differential signal and converting a second low-voltage differential signal into the second single-ended signal; The photoelectric conversion unit is connected with the second signal conversion unit and is used for converting the first low-voltage differential signal into a first optical signal for output, receiving a second optical signal and converting the second optical signal into a second low-voltage differential signal; The interference detection unit is connected with the first signal conversion unit and is used for performing signal processing based on at least two first single-ended signals and generating the state signals.
  3. 3. The optical switching module according to claim 2, wherein the power supply unit comprises a control unit, a fault error reporting unit, a first photoelectric isolation unit and a second photoelectric isolation unit; The control unit is connected with the first signal conversion unit, the first signal conversion unit is used for converting an external differential control signal into a single-ended control signal, the control unit controls the first power supply voltage to be powered on or powered off based on the single-ended control signal, and the first photoelectric isolation unit is connected between the first signal conversion unit and the control unit to realize electric isolation; The fault error reporting unit is connected with the first signal conversion unit, the fault error reporting unit is used for generating a fault error reporting single-ended signal based on the working state of the power supply unit, the first signal conversion unit is used for converting the fault error reporting single-ended signal into a fault error reporting differential signal and transmitting the fault error reporting differential signal to the outside, and the second photoelectric isolation unit is connected between the first signal conversion unit and the fault error reporting unit to realize electric isolation.
  4. 4. The optical switching module according to claim 3, wherein the first optocoupler comprises a first optocoupler, a first transistor, a first matching resistor and a second matching resistor, the first optocoupler has a first input terminal connected to a second power supply voltage, the second input terminal directly or indirectly connected to the first signal conversion unit, a first output terminal connected to a ground potential, a second output terminal connected to a first terminal of the first matching resistor, a second terminal of the first matching resistor connected to a first terminal of the second matching resistor and a base of the first transistor, a second terminal of the second matching resistor connected to an emitter of the first transistor and an operating voltage, a collector of the first transistor connected to the control unit, and/or, The second photoelectric isolation unit comprises a second photoelectric coupler, a first input end of the second photoelectric coupler is directly or indirectly connected with the fault error reporting unit, a second input end of the second photoelectric coupler is connected with the ground potential, a first output end of the second photoelectric coupler is connected with the ground potential, a second output end of the second photoelectric coupler is directly or indirectly connected with a second power supply voltage, and a second output end of the second photoelectric coupler is connected with the first signal conversion unit.
  5. 5. The optical switching module according to claim 3, wherein the first signal conversion unit comprises a differential to single-ended signal conversion chip and a single-ended to single-ended signal conversion chip, an input end of the differential to single-ended signal conversion chip receives the first differential signal, an output end of the differential to single-ended signal conversion chip is connected to the second signal conversion unit for converting the first differential signal into a first single-ended signal and converting an external differential control signal into a single-ended control signal, an input end of the single-ended to single-differential signal is connected to the second signal conversion unit for receiving the second single-ended signal, for converting the second single-ended signal into a second differential signal and outputting the second differential signal through an output end thereof, and for converting a fault-reported single-ended signal into a fault-reported differential signal and transmitting the fault-reported single-ended signal to the outside, The second signal conversion unit comprises a low-voltage differential to single-ended signal conversion chip and a single-ended to low-voltage differential signal conversion chip, wherein an input end of the low-voltage differential to single-ended signal conversion chip receives a first low-voltage differential signal, an output end of the low-voltage differential to single-ended signal conversion chip is connected with the first signal conversion unit and is used for converting the first low-voltage differential signal into a second single-ended signal, an input end of the single-ended to low-voltage differential signal conversion chip is connected with the first signal conversion unit and is used for receiving the first single-ended signal, and an output end of the single-ended to low-voltage differential signal conversion chip is connected with the photoelectric conversion unit and is used for converting the first single-ended signal into the second low-voltage differential signal.
  6. 6. The optical switching module according to claim 2, wherein the photoelectric conversion unit includes a transmitter peripheral circuit, a receiver peripheral circuit, and a communication state monitoring unit; The transmitter peripheral circuit comprises a first capacitor, a second capacitor, a first resistor and a first diode component, wherein the first end of the first capacitor and the first end of the second capacitor are used for receiving the first low-voltage differential signal, the second end of the first capacitor is connected with the first end of the first resistor and the first end of the first diode component, the second end of the second capacitor is connected with the second end of the first resistor and the second end of the first diode component, and the third end of the first diode component is connected with the ground voltage; The receiver peripheral circuit comprises a third capacitor, a fourth capacitor, a second resistor and a second diode component, wherein the first end of the third capacitor and the first end of the fourth capacitor are used for generating the second low-voltage differential signal, the second end of the third capacitor is connected with the first end of the second resistor and the first end of the second diode component, the second end of the fourth capacitor is connected with the second end of the second resistor and the second end of the second diode component, and the third end of the second diode component is connected with the ground voltage; The communication state monitoring unit comprises a first diode, a third resistor, a fourth resistor and a third transistor, wherein the first end of the third resistor is directly or indirectly connected with the receiver, the second end of the third resistor is connected with the base electrode of the third transistor, the collector electrode of the third transistor is connected with the ground potential, the emitter electrode of the third transistor is connected with the cathode electrode of the first diode, the anode electrode of the first diode is connected with the first end of the fourth resistor, and the second end of the fourth resistor is connected with the first power supply voltage.
  7. 7. The optical switch module of claim 2, wherein the interference detection unit comprises a first not gate, a second not gate, a first and gate, a second and gate, and an or gate; The input end of the first NOT gate receives a first single-ended signal, the input end of the second NOT gate receives an adjacent first single-ended signal, the output end of the first NOT gate is connected with the first input end of the first AND gate, the second input end of the first AND gate receives an adjacent first single-ended signal, the output end of the first AND gate is connected with the first input end of the OR gate, the first input end of the second AND gate is connected with the output end of the second NOT gate, the second input end of the second AND gate receives the first single-ended signal, the output end of the second AND gate is connected with the second input end of the OR gate, and the output end of the OR gate generates a state signal.
  8. 8. The optical switching module according to claim 7, wherein the interference detection unit further comprises a timer and a second diode, an input pin of the timer is connected to the output terminal of the or gate and receives the status signal, a cathode of the second diode is connected to the output pin of the timer, and an anode of the second diode is connected to the first power supply voltage.
  9. 9. A control system comprising a controller, a driver, and the optical switching module according to any one of claims 1-8; the optical switching module comprises a first optical switching unit and a plurality of second optical switching units, wherein the first optical switching unit and each second optical switching unit respectively comprise at least one group of photoelectric converters, the photoelectric converters are used for realizing bidirectional conversion between electric signals and optical signals and monitoring the electric signals and generating state signals used for representing whether the electric signals are interfered or not, and the first optical switching unit comprises a power supply unit which is electrically connected with the photoelectric converters and provides a first power supply voltage for all the photoelectric converters; The controller is electrically connected with the photoelectric converter and is used for generating and receiving an electric signal; the driver is connected with the photoelectric converter through an optical fiber.
  10. 10. The control system of claim 9, wherein the light switching module comprises a first light switching unit and two second light switching units, the first light switching unit and each of the second light switching units respectively comprising two sets of photoelectric converters; and/or the number of drivers is less than or equal to the number of photoelectric converters.

Description

Optical switching module and control system Technical Field The utility model belongs to the technical field of industrial control and automation thereof, and particularly relates to an optical switching module and a control system. Background In industrial control systems, communication between the controller and the drive typically relies on transmission of electrical signals. However, this conventional approach is susceptible to electromagnetic interference (EMI), especially in the case of complex electromagnetic environments or long-distance transmission, data transmission is unstable. In the prior art, a plurality of relay modules are generally introduced between a controller and a driver, wherein one relay module is designated as a master relay, and the rest relay modules are slave relays. Through RS485 communication connection, the slave relays are responsible for receiving and forwarding the target signals sent by the controller to the driver, and the host relays periodically poll each slave relay to receive the signals at preset time and regulate and control according to the information, so that the target control signals are ensured to be accurately transmitted to the driver. Disadvantages of the prior art include that communication still relies on RS485 electrical signal communication despite the addition of a relay module, which is susceptible to electromagnetic interference (EMI). Particularly in complex electromagnetic conditions in industrial environments, even with relay modules, signal transmissions may be disturbed, affecting the stability and reliability of the communication. In addition, the transmission signals are required to be compared and regulated, the complexity of the system is increased, the overall maintenance cost is increased, when the transmission lines are problematic or the transmission lines with different lengths are required, cables are required to be manufactured again, so that expansibility and flexibility are poor, the rapid adjustment and upgrading of the system are inconvenient, the data transmission rate of communication is relatively low, the requirements of high-speed and high-precision application are difficult to meet, and the response speed and the instantaneity of the system are limited. Therefore, in order to solve the above-mentioned problems, it is necessary to provide an optical switching module and a control system. Disclosure of utility model The utility model aims to provide an optical switching module and a control system, which can reduce the complexity of a communication system between a controller and a driver, and the optical switching module only performs photoelectric signal conversion and monitors whether an input electric signal is interfered or not, so that communication with a CPU is not needed. In order to achieve the above object, a specific embodiment of the present utility model provides the following technical solution: an optical switching module comprises a first optical switching unit and a plurality of second optical switching units; The first optical switching units and the second optical switching units respectively comprise at least one group of photoelectric converters, wherein the photoelectric converters are used for realizing bidirectional conversion between electric signals and optical signals and monitoring the electric signals and generating state signals for representing whether the electric signals are interfered or not; the first optical switching unit further comprises a power supply unit, wherein the power supply unit is electrically connected with the photoelectric converters and provides a first power supply voltage for all the photoelectric converters. In one or more embodiments of the present utility model, the photoelectric converter includes a first signal conversion unit, a second signal conversion unit, a photoelectric conversion unit, and an interference detection unit, the electrical signal includes a first differential signal and a second differential signal, and the optical signal includes a first optical signal and a second optical signal; The first signal conversion unit is used for converting a first differential signal into a first single-ended signal and converting a second single-ended signal into a second differential signal; the second signal conversion unit is connected with the first signal conversion unit and is used for converting the first single-ended signal into a first low-voltage differential signal and converting a second low-voltage differential signal into the second single-ended signal; The photoelectric conversion unit is connected with the second signal conversion unit and is used for converting the first low-voltage differential signal into a first optical signal for output, receiving a second optical signal and converting the second optical signal into a second low-voltage differential signal; The interference detection unit is connected with the first signal conversion unit and i