Optical switch device, control method thereof and storage medium

Abstract

The invention relates to the field of optical switch products, in particular to an optical switch device, a control method thereof and a storage medium. Comprising a PCBA board and an MEMS optical switch, the MEMS optical switch is welded to the PCBA board, a connector and a driving circuit are arranged on the PCBA board, the connector is connected with an external controller, the input end of the driving circuit is connected with the connector, the output end of the driving circuit is connected with the MEMS optical switch, a digital-to-analog converter with a nonvolatile memory is arranged in the driving circuit, and the output end of the driving circuit is connected with the MEMS optical switch. DAC values corresponding to channels in the MEMS optical switch are stored in the digital-to-analog converter with the nonvolatile memory, and the digital-to-analog converter can automatically read and configure the corresponding DAC values according to an external control signal so as to drive the MEMS optical switch to be switched to a target channel; according to the scheme, an MCU element and a storage chip do not need to be arranged, a corresponding control program does not need to be developed for a product, program implantation does not need to be conducted on the PCBA board in the production process, the device size is reduced, the product development cost is reduced, control is easy, and the purposes of high integration and low cost are achieved.

Description

Technical Field

[0001] This invention relates to the field of optical switch products, specifically to an optical switch device, its control method, and a storage medium. Background Technology

[0002] In optical communication transmission systems, optical switches are essential optical devices. Currently, commonly used optical switches are divided into two types: mechanical optical switches and MEMS optical switches. Mechanical optical switches are controlled by high and low voltage levels, which is convenient to use. However, mechanical optical switches contain relays, and due to the size limitations of the relays, the size of mechanical optical switches cannot be further optimized and reduced. Moreover, the cost of mechanical optical switches remains high due to the cost of the relays. MEMS optical switches are relatively small in size, but the existing control methods of MEMS optical switches are relatively complex. They require the use of matching SPI or IIC communication protocols, as well as external EEPROM modules and external MCUs. By embedding corresponding control programs into the MCU, the SPI or IIC communication commands are changed to high and low voltage signals to control the MEMS optical switch.

[0003] Therefore, designing a small-sized and simple-to-control optical switch device, along with its control method and storage medium, is of great importance to those skilled in the art. Summary of the Invention

[0004] This invention provides a small-sized and simple-to-control optical switch device, its control method, and a storage medium to solve the problems of large size and high cost of existing mechanical optical switches and complex control methods of MEMS optical switches.

[0005] This invention discloses an optical switch device, comprising a PCBA board and a MEMS optical switch. The MEMS optical switch is soldered onto the PCBA board. A connector and a driving circuit are disposed on the PCBA board. The connector is connected to an external control system to acquire external control signals. The input terminal of the driving circuit is connected to the connector, and the output terminal of the driving circuit is connected to the MEMS optical switch to control the MEMS optical switch. The driving circuit includes a digital-to-analog converter with non-volatile memory. The digital-to-analog converter with non-volatile memory stores the DAC values ​​corresponding to each channel of the MEMS optical switch. It can automatically read and configure the corresponding DAC values ​​according to the external control signals received by the connector to drive and control the MEMS optical switch to switch to the target channel.

[0006] Optionally, the connector is provided with multiple control signal input pins, all of which are connected to an external control signal output interface through the connector to control the switching of MEMS optical switch channels respectively.

[0007] Optionally, the digital-to-analog converter with non-volatile memory has a pre-set mapping table to reflect the relationship between the multiple control signal input pins and the MEMS optical switch channel.

[0008] Optionally, the external control signal is a high / low level signal.

[0009] To address the problems existing in the prior art, the present invention also provides a control method for an optical switching device. The control method is implemented using the optical switching device described above, and includes the following steps: The MEMS optical switch was calibrated, and the corresponding DAC values ​​for each channel were confirmed. Write the DAC values ​​corresponding to each channel of the MEMS optical switch into a digital-to-analog converter with non-volatile memory; External control signals are received through the connector and transmitted to the drive circuit. The digital-to-analog converter with non-volatile memory automatically reads and configures the corresponding DAC value according to the external control signal, and drives the MEMS optical switch to switch to the target channel.

[0010] Optionally, the step of "calibrating the MEMS optical switch and confirming the DAC value corresponding to each channel" includes the following steps: An external control program is used to control a digital-to-analog converter with non-volatile memory via a connector to continuously change its output DAC value. When the input signal of the MEMS optical switch is output at the designated output port and the optical signal is optimal, record the current DAC value; The recorded current DAC value is used as the calibration value for the output port, and this calibration value is written into the digital-to-analog converter with non-volatile memory.

[0011] Optionally, the connector is provided with multiple control signal input pins, and the control method further includes the following steps: Establish a mapping table by associating multiple control signal input pins on the connector with channels on the MEMS optical switch; Write the established mapping table into a digital-to-analog converter with non-volatile memory; The digital-to-analog converter with non-volatile memory automatically reads and configures the DAC value corresponding to the target channel based on the external control signals and mapping table received by the connector, and drives the MEMS optical switch to switch to the target channel.

[0012] Optionally, the external control signal is a high / low level signal.

[0013] Optionally, the control method further includes the following steps: When the connector's control signal input pin receives a low level, the digital-to-analog converter with non-volatile memory does not read the configuration parameters; When the connector's control signal input pin receives a high level, the digital-to-analog converter with non-volatile memory automatically reads and configures the corresponding DAC value to drive the MEMS optical switch to switch to the target channel.

[0014] To address the problems existing in the prior art, the present invention also provides a storage medium, wherein the storage medium contains a computer program, and when the computer program is executed by a processor, the processor performs the steps of the control method described above.

[0015] The beneficial effects of this invention are as follows: By designing an optical switch device, the driving circuit of which employs a digital-to-analog converter with non-volatile memory, the digital-to-analog converter with non-volatile memory stores the DAC values ​​corresponding to each channel in the MEMS optical switch. It can automatically read and configure the corresponding DAC values ​​according to the external control signals received by the connector, thereby driving the MEMS optical switch to switch to the target channel. On the one hand, this solution eliminates the need for MCU components and external storage chips, and the product does not require the development of corresponding control programs. Furthermore, no program implantation operation is required on the PCBA board during production, which not only reduces the size of the optical switch device but also simplifies control, reduces product development costs, and achieves cost reduction. On the other hand, there is no need for an additional controller to calculate and transmit DAC driving parameters in real time; simply receiving the channel selection signal triggers the DAC to automatically read the pre-stored values, shortening the optical path switching delay and reducing programming complexity and data transmission pressure. Attached Figure Description

[0016] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. In the accompanying drawings: Figure 1 This is a schematic diagram of the optical switch device in an embodiment of the present invention; Figure 2 This is a flowchart of the control method for the optical switch device in an embodiment of the present invention. Figure 1 ; Figure 3 This is a flowchart of the control method for the optical switch device in an embodiment of the present invention. Figure 2 ; Figure 4 This is a flowchart of the control method for the optical switch device in an embodiment of the present invention. Figure 3 ; Figure 5 This is a flowchart of the control method for the optical switch device in an embodiment of the present invention. Figure 4 .

[0017] The labels for the attached figures are as follows: 1. PCBA board; 2. MEMS optical switch; 11. Connector; 12. Driver circuit; 121. Digital-to-analog converter. Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0019] Existing MEMS optical switch control typically involves specifying pins on the electrical connectors on the PCBA board and communicating externally via SPI or IIC. Using a pre-embedded MCU program on the PCBA, the channel switching of the MEMS optical switch can be directly driven and controlled. The DAC values ​​corresponding to each channel in each MEMS optical switch are pre-calibrated and written into the electrically erasable programmable read-only memory (EROM) on the PCBA board. This means the EROM pre-stores the DAC values ​​for each channel of the MEMS optical switch. Users input control signals to the product's electrical interface. The MCU on the PCBA board accesses the EROM based on the input signal, retrieves the DAC value corresponding to the target channel, and then assigns it to the drive circuit, thus controlling the MEMS optical switch. This requires pre-embedding the corresponding control program within the MCU, which uses IIC or SPI communication to obtain the high and low level signals on the specified pins of the connector, interprets them, and then controls the MEMS optical switch. This makes the MEMS optical switch control similar to that of a mechanical optical switch; sending high and low level signals to the PCBA board causes the product to switch the corresponding channel.

[0020] However, this design requires the introduction of MCU components and electrically erasable programmable read-only memory, which not only increases costs but also occupies PCB space, making it difficult to meet the development trend of miniaturization and integration. Further optimization of the MEMS optical switch control scheme is needed, namely the following scheme.

[0021] like Figure 1 As shown, the present invention provides a specific embodiment of an optical switching device.

[0022] A light switch device, reference Figure 1The optical switch device includes a PCBA board 1 and a MEMS optical switch 2. The MEMS optical switch 2 is soldered onto the PCBA board 1. A connector 11 and a driving circuit 12 are provided on the PCBA board 1. The connector 11 is connected to an external control to obtain external control signals. The input terminal of the driving circuit 12 is connected to the connector 11, and the output terminal of the driving circuit 12 is connected to the MEMS optical switch 2 to control the MEMS optical switch 2.

[0023] The driving circuit 12 includes a digital-to-analog converter 121 with non-volatile memory. The digital-to-analog converter 121 with non-volatile memory stores the DAC values ​​corresponding to each channel in the MEMS optical switch 2. It can automatically read and configure the corresponding DAC values ​​according to the external control signals received by the connector 11 to drive and control the MEMS optical switch 2 to switch to the target channel.

[0024] Specifically, PCBA board 1 serves as the core carrier and connection platform for the optical switch device. It provides mechanical support for MEMS optical switch 2, connector 11, and drive circuit 12, while also achieving electrical connections between various components through copper foil lines printed on the board. This establishes signal transmission and power supply paths, ensuring reliable data and power transmission between modules. MEMS optical switch 2 is the execution component that realizes optical path switching and is the core functional unit of the optical switch device. Under the control of the drive signal, it can change the transmission path of the optical signal by rotating its internal microelectromechanical structure, thereby realizing the switching between different optical channels. Connector 11 is the interface component between the optical switch device and the external controller. It is used to establish the physical and electrical connection between the optical switch device and the external controller, and to receive external control signals. Connector 11 is provided with multiple control signal input pins corresponding to different channels in MEMS optical switch 2. These control signal input pins can receive control commands such as channel selection sent by the external controller and accurately transmit these commands to the drive circuit 12 on PCBA board 1, thereby driving MEMS optical switch 2 to switch to the target channel.

[0025] The digital-to-analog converter 121 with non-volatile memory is ready to use upon power-up. It can be used to store DAC configuration data, such as the initial values, gain, and offset of the output channels. When the device is powered on, the digital-to-analog converter 121 with non-volatile memory automatically reads these configurations from its internal non-volatile memory and sets them automatically without the intervention of the MCU. This makes the system startup behavior very deterministic and fast. Furthermore, for applications that need to save user-defined analog settings (such as the volume of audio devices or the voltage setpoint of the power supply), the final setting value can be written into the non-volatile memory inside the digital-to-analog converter. Even if the power is completely lost, the user's last settings will be restored upon the next power-on. More importantly, in high-precision applications, each system may have slight gain and offset errors. During the production calibration process, unique calibration coefficients for each unit can be calculated and stored in the non-volatile memory inside the digital-to-analog converter. This ensures that the digital-to-analog converter automatically applies these coefficients during operation, thereby guaranteeing factory accuracy.

[0026] The control process of the optical switch device is as follows: First, each channel in the MEMS optical switch 2 is calibrated and its DAC value is confirmed. Then, the DAC value corresponding to each confirmed channel is written into the digital-to-analog converter 121 with non-volatile memory. That is, the mapping relationship between each channel in the MEMS optical switch 2 and its corresponding DAC value is recorded and written into the digital-to-analog converter with non-volatile memory. When the optical switch device is working normally, the external controller can establish a physical and electrical connection with the optical switch device through the connector 11. According to the optical path scheduling requirements, the external controller generates a control signal for the target channel and sends the signal to the control signal input pin of the connector 11. The connector 11 transmits the received control signal to the signal input terminal of the drive circuit 12 through the copper foil line on the PCBA board 1. When the drive circuit 12 receives the external control signal, it triggers the digital-to-analog converter 121 with non-volatile memory to read the DAC value corresponding to the target channel from its internal non-volatile memory, converts the DAC value into an analog drive signal, and outputs it to the MEMS optical switch 2 to drive the MEMS optical switch 2 to switch to the target channel.

[0027] In this embodiment, an optical switch device is designed, in which the driving circuit 12 employs a digital-to-analog converter 121 with non-volatile memory. The digital-to-analog converter 121 with non-volatile memory stores the DAC values ​​corresponding to each channel in the MEMS optical switch 2. It can automatically read and configure the corresponding DAC values ​​according to the external control signals received by the connector 11 to drive and control the MEMS optical switch 2 to switch to the target channel. On the one hand, this solution does not require setting up MCU components or external storage chips, and the product does not require the development of corresponding control programs. There is also no need to perform program implantation operations on the PCBA board 1 during the production process. This not only reduces the size of the optical switch device, but also simplifies control, reduces product development costs, and achieves the goal of cost reduction. On the other hand, there is no need for an additional controller to calculate and transmit DAC drive parameters in real time. The DAC can be automatically read from the pre-stored values ​​simply by receiving the channel selection signal, which shortens the optical path switching delay and reduces programming complexity and data transmission pressure.

[0028] In one embodiment, the external control signal is a high / low level signal, and the connector 11 is provided with multiple control signal input pins. All multiple control signal input pins are connected to the signal output interface of the external control through the connector 11 to control the switching of the MEMS optical switch.

[0029] Specifically, by designing multiple control signal input pins corresponding to MEMS optical switches, physical connections and control logic are achieved, enabling independent and direct control of each channel of MEMS optical switch 2. Each control signal input pin corresponds to one channel of MEMS optical switch 2. No encoding processing of the control signals is required; simply outputting a simple switching signal (such as a high or low level signal) to the pin corresponding to the target channel triggers the switching. This design eliminates the complex processing steps of encoding parsing and logic mapping in the driver circuit 12, simplifying hardware circuit design and software programming logic, and reducing the R&D and production costs of the device. Furthermore, the control signals of each channel are independently controlled via... The pin-based transmission ensures that signal paths do not interfere with each other, avoiding issues such as signal crosstalk and decoding errors that may occur in encoding control. Even if the control signal of one pin is abnormal, it will not affect the normal switching of other channels, significantly improving the stability and fault tolerance in multi-channel parallel control scenarios. Furthermore, since there is no need for intermediate processes such as signal encoding and parsing, the control signal can be directly triggered to read the DAC value and output the drive signal after being transmitted from the external controller to the drive circuit 12 via the pin, greatly shortening the signal processing delay. This design is particularly suitable for scenarios with high requirements for channel switching speed (such as high-speed optical communication and real-time optical path scheduling), and can meet the needs of rapid response.

[0030] In one embodiment, the digital-to-analog converter 121 with non-volatile memory has a pre-defined mapping table to reflect the relationship between multiple control signal input pins and MEMS optical switch channels.

[0031] like Figures 2 to 5 As shown, the present invention also provides a specific embodiment of a control method for an optical switch device.

[0032] A control method for an optical switch device, referenced Figure 2 The control method is implemented through the aforementioned optical switch device, specifically including the following steps: S1. Calibrate the MEMS optical switch and confirm the DAC value corresponding to each channel; S2. Write the DAC values ​​corresponding to each channel of the MEMS optical switch into the digital-to-analog converter with non-volatile memory; S3. Receive external control signals through the connector and transmit them to the drive circuit; S4. The digital-to-analog converter with non-volatile memory automatically reads and configures the corresponding DAC value according to the external control signal, and drives the MEMS optical switch to switch to the target channel.

[0033] Steps S1 and S2 are the production calibration steps for the optical switch device, and users do not need to master professional parameter debugging skills, while steps S3 and S4 are the operation steps for the optical switch device.

[0034] Specifically, each channel in the MEMS optical switch is first calibrated and its DAC value is confirmed. Then, the confirmed DAC values ​​corresponding to each channel are written into a digital-to-analog converter with non-volatile memory. This records the mapping relationship between each channel in the MEMS optical switch and its corresponding DAC value. When the optical switch is working normally, the external controller can establish a physical and electrical connection with the optical switch through a connector. According to the optical path scheduling requirements, the external controller generates an external control signal for the target channel and sends the external control signal to the control signal input pin of the connector. The connector transmits the received external control signal to the signal input terminal of the drive circuit through the copper foil lines on the PCBA board. When the drive circuit receives the external control signal, it triggers the digital-to-analog converter with non-volatile memory to read the DAC value corresponding to the target channel from its internal non-volatile memory, converts the DAC value into an analog drive signal, and outputs it to the MEMS optical switch to drive the MEMS optical switch to switch to the target channel.

[0035] In step 1, the MEMS optical switch is calibrated to confirm the DAC value corresponding to each channel, ensuring that the driving parameters of each channel are precisely matched with the microstructure characteristics of the MEMS optical switch. In step 2, the parameters are stored in the non-volatile memory inside the digital-to-analog converter to avoid parameter deviations during each control. The combination of these two steps ensures that the optical path performance remains consistent across multiple switching of the same channel, such as insertion loss and alignment accuracy, thus improving the stability of optical signal transmission. Step 3 only requires the transmission of external control signals, such as high and low level signals, without the need for complex driving parameters, reducing the amount of signal transmission. In step 4, the digital-to-analog converter directly reads the pre-stored parameters and completes the driving conversion, eliminating the need for real-time calculations and parameter configuration by the external controller. The delay from the input of the control signal to the channel switching is significantly reduced, making it particularly suitable for scenarios sensitive to response speed.

[0036] In one embodiment, reference Figure 3 "Calibrating the MEMS optical switch and confirming the DAC value for each channel" includes the following steps: S11. Using an external control program, the digital-to-analog converter with non-volatile memory is controlled through a connector to continuously change its output DAC value. S12. When the input signal of the MEMS optical switch is output at the specified output port and the optical signal is optimal, record the current DAC value; S13. Use the recorded current DAC value as the calibration value of the output port, and write the calibration value into the digital-to-analog converter with non-volatile memory.

[0037] Specifically, the external control program controls the digital-to-analog converter (DAC) on the drive circuit of the PCBA board through the connector, and continuously changes the DAC output value, thereby changing the optical signal transmission of the MEMS optical switch. When the input of the MEMS optical switch is output at the specified MEMS optical switch output port and reaches the optimal value, the DAC value at this time is recorded. This DAC value is used as the calibration value of the current output port and is written into the non-volatile memory inside the DAC. It should be noted that the calibration control program is outside the PCBA board. When the user wants to drive the MEMS optical switch to a specified channel, he / she only needs to input a high / low level signal on the specified control signal input pin of the connector. The DAC with non-volatile memory will directly read the corresponding DAC value from its own non-volatile memory, set it automatically, and then output a specified voltage according to the DAC value, thereby realizing the control of the MEMS optical switch.

[0038] In one embodiment, the connector is provided with multiple control signal input pins, as referenced. Figure 4 The control method also includes the following steps: S51. Establish a mapping table by associating the multiple control signal input pins on the connector with the channels on the MEMS optical switch. S52. Write the established mapping table into the digital-to-analog converter with non-volatile memory; S53. Based on the external control signals and mapping table received by the connector, the digital-to-analog converter with non-volatile memory automatically reads and configures the DAC value corresponding to the target channel, and drives the MEMS optical switch to switch to the target channel.

[0039] Specifically, by designing multiple control signal input pins corresponding to MEMS optical switches, a one-to-one physical connection and control logic are achieved, enabling independent and direct control of each channel of the MEMS optical switch. Each control signal input pin corresponds to one channel of the MEMS optical switch. No encoding processing of the control signals is required; simply outputting a simple switching signal (such as a high or low level signal) to the pin corresponding to the target channel triggers the switching. This design eliminates complex processing steps such as encoding parsing and logic mapping in the drive circuit, simplifying hardware circuit design and software programming logic, and reducing the R&D and production costs of the device. Furthermore, the control signals of each channel are independently... Pin-based transmission ensures that signal paths do not interfere with each other, avoiding issues such as signal crosstalk and decoding errors that may occur in encoding control. Even if the control signal of one pin is abnormal, it will not affect the normal switching of other channels, significantly improving the stability and fault tolerance in multi-channel parallel control scenarios. Furthermore, since there is no need for intermediate processes such as signal encoding and parsing, the control signal can be directly triggered to read the DAC value and output the drive signal after being transmitted from the external controller to the drive circuit via the pin, greatly shortening the signal processing delay. This design is particularly suitable for scenarios with high requirements for channel switching speed (such as high-speed optical communication and real-time optical path scheduling), and can meet the needs of rapid response.

[0040] In one embodiment, reference Figure 5 The control method also includes the following steps: S61. When the control signal input pin of the connector receives a low level, the digital-to-analog converter with non-volatile memory does not read the configuration parameters. S62. When the control signal input pin of the connector receives a high level, the digital-to-analog converter with non-volatile memory automatically reads and configures the corresponding DAC value to drive the MEMS optical switch to switch to the target channel.

[0041] Specifically, when the optical switch is working normally, the external controller can establish a physical and electrical connection with the optical switch through the connector. According to the optical path scheduling requirements, the external controller outputs a high level to the control signal input pin corresponding to the target channel. After receiving the high level, the control signal input pin on the connector transmits it to the signal input terminal of the drive circuit. When the drive circuit receives the high level of the control signal input pin, it triggers the digital-to-analog converter with non-volatile memory to read and configure the DAC value corresponding to the target channel from its internal non-volatile memory, and then converts the DAC value into an analog drive signal and outputs it to the MEMS optical switch to drive the MEMS optical switch to switch to the target channel.

[0042] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Those skilled in the art can modify the technical solutions described in the above embodiments, or make equivalent substitutions for some of the technical features; and all such modifications and substitutions should fall within the protection scope of the appended claims of the present invention.

Claims

1. An optical switching device, characterized in that: The device includes a PCBA board and a MEMS optical switch. The MEMS optical switch is soldered onto the PCBA board. The PCBA board has a connector and a driving circuit. The connector is connected to an external control system to acquire external control signals. The input terminal of the driving circuit is connected to the connector, and the output terminal of the driving circuit is connected to the MEMS optical switch to control the MEMS optical switch. The driving circuit includes a digital-to-analog converter (DAC) with non-volatile memory. The DAC stores the DAC values ​​corresponding to each channel of the MEMS optical switch. It can automatically read and configure the corresponding DAC values ​​according to the external control signals received by the connector to drive the MEMS optical switch to switch to the target channel.

2. The optical switch device according to claim 1, characterized in that: The connector is provided with multiple control signal input pins, which are all connected to an external control signal output interface through the connector to control the switching of MEMS optical switch channels respectively.

3. The optical switch device according to claim 2, characterized in that: The digital-to-analog converter with non-volatile memory has a pre-set mapping table to reflect the correspondence between the multiple control signal input pins and the multiple MEMS optical switch channels.

4. The optical switch device according to claim 1, characterized in that: The external control signal is a high / low level signal.

5. A control method for an optical switching device, wherein the control method is implemented using an optical switching device as described in any one of claims 1-4, characterized in that, Includes the following steps: The MEMS optical switch was calibrated, and the corresponding DAC values ​​for each channel were confirmed. Write the DAC values ​​corresponding to each channel of the MEMS optical switch into a digital-to-analog converter with non-volatile memory; External control signals are received through the connector and transmitted to the drive circuit. The digital-to-analog converter with non-volatile memory automatically reads and configures the corresponding DAC value according to the external control signal, and drives the MEMS optical switch to switch to the target channel.

6. The control method according to claim 5, characterized in that, The step of "calibrating the MEMS optical switch and confirming the DAC value corresponding to each channel" includes the following steps: An external control program is used to control a digital-to-analog converter with non-volatile memory via a connector to continuously change its output DAC value. When the input signal of the MEMS optical switch is output at the designated output port and the optical signal is optimal, record the current DAC value; The recorded current DAC value is used as the calibration value for the output port, and this calibration value is written into the digital-to-analog converter with non-volatile memory.

7. The control method according to claim 6, characterized in that, The connector is provided with multiple control signal input pins, and the control method further includes the following steps: Establish a mapping table by associating multiple control signal input pins on the connector with channels on the MEMS optical switch; Write the established mapping table into a digital-to-analog converter with non-volatile memory; The digital-to-analog converter with non-volatile memory automatically reads and configures the DAC value corresponding to the target channel based on the external control signals and mapping table received by the connector, and drives the MEMS optical switch to switch to the target channel.

8. The control method according to claim 6, characterized in that, The external control signal is a high / low level signal.

9. The optical switch device according to claim 8, characterized in that, The control method further includes the following steps: When the connector's control signal input pin receives a low level, the digital-to-analog converter with non-volatile memory does not read the configuration parameters; When the connector's control signal input pin receives a high level, the digital-to-analog converter with non-volatile memory automatically reads and configures the corresponding DAC value to drive the MEMS optical switch to switch to the target channel.

10. A storage medium, characterized in that, The system stores a computer program, which, when executed by a processor, causes the processor to perform the steps of the control method as described in any one of claims 5-9.

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