Electro-optical signal conversion method and device

Abstract

The invention relates to the technical field of circuits, and discloses an electro-optical signal conversion method and equipment. The equipment comprises an input module which is connected with at least two paths of signal output interfaces of tested equipment and is used for transmitting at least two paths of signals of the tested equipment to a signal processing module; the signal processing module is used for combining and encoding the at least two paths of signals to generate an electric signal, and transmitting the electric signal to the electro-optical conversion module; the electro-optical conversion module is used for converting the electric signal into an optical signal; and the main control chip is used for controlling the working mode of at least one of the input module, the signal processing module, the main control chip and the electro-optical conversion module according to the current signal transmission state. The electric signal is converted into the optical signal, so that the influence of electromagnetic coupling is avoided.

Description

Technical Field

[0001] The present application relates to the field of circuit technology, and in particular to an electro-optical signal conversion method and device. Background Art

[0002] Electromagnetic compatibility (EMC) testing is the process of evaluating whether electronic equipment can function properly in an electromagnetic environment and not interfere with other equipment.

[0003] In electromagnetic compatibility testing, electronic equipment needs to be placed in a microwave darkroom and the data of the electronic equipment needs to be transmitted out of the microwave darkroom. If traditional signal lines are used directly for transmission, the electromagnetic coupling carried by the signal lines will affect the experimental results.

[0004] In view of this, this application is filed. Summary of the invention

[0005] The present application provides an electro-optical signal conversion method and device, which avoids the influence of electromagnetic coupling by converting electrical signals into optical signals.

[0006] In a first aspect, the present application provides an electro-optical signal conversion method and device, including: An input module, connected to at least two signal output interfaces of the device under test, and used to transmit at least two signals of the device under test to the signal processing module; The signal processing module is used to combine and encode the at least two signals to generate an electrical signal, and transmit the electrical signal to the electro-optical conversion module; An electro-optical conversion module, used for converting the electrical signal into an optical signal; The main control chip is used to control the working mode of at least one of the input module, the signal processing module, the main control chip and the electro-optical conversion module according to the current signal transmission state.

[0007] Optionally, the electro-optical conversion module further includes: The signal output module is used to control whether the optical signal is transmitted to the external optical fiber.

[0008] Optionally, the electro-optical conversion module further includes: A preprocessing circuit, used for preprocessing the electrical signal to obtain a processed signal, and transmitting the processed signal to the laser driver; The laser driver is used to generate a modulation current according to the processed signal and send the modulation current to the laser; The laser is used to perform electrical-to-optical conversion on the modulated current to generate an optical signal.

[0009] Optionally, the input module of the electro-optical conversion module includes at least two of the following interfaces: Gigabit Ethernet T1 interface, Gigabit Ethernet Tx interface, Controller Area Network CAN and CANFD interface, Local Interconnect Network interface, Car Audio Bus interface, Low Voltage Differential Signal interface, Camera serial interface and analog signal interface.

[0010] In a second aspect, the present application provides an electro-optical signal conversion method, using an electro-optical signal conversion device, the method comprising: Get the current signal transmission status of the target module; According to the current signal transmission state, controlling the target module to enter a working mode corresponding to the current signal transmission state; The target module is at least one of an input module, a signal processing module, a main control chip and an electro-optical conversion module.

[0011] Optionally, the working mode includes at least a whole sleep mode, a partial sleep mode and a running mode; According to the current signal transmission state, controlling the target module to enter a working mode corresponding to the current signal transmission state includes: If all current signals are in a non-transmitting state and the duration of the non-transmitting state exceeds a set duration, all modules in the electro-optical signal conversion device are controlled to enter an overall sleep mode; If the current partial signal is in a transmission state, controlling the target module to enter a partial sleep mode; If all current signals are in the transmission state, the target mode is controlled to enter the running mode.

[0012] Optionally, according to the current signal transmission state, controlling the target module to enter a working mode corresponding to the current signal transmission state includes: Determine the status bit of each target module according to the current signal transmission status; wherein the status bit indicates whether the target module is in a working state and the workload; According to the status bit of each target module, the working mode of the target module is controlled.

[0013] Optionally, according to the current signal transmission state, controlling the target module to enter a working mode corresponding to the current signal transmission state includes: Detecting whether the target module is in a working state and the workload through a working state detection circuit of the target module; The working mode of the target module is controlled according to whether the target module is in a working state and the workload.

[0014] Optionally, after obtaining the current signal transmission status of the target module, the following steps are further included: Determine the working module according to the current signal transmission state, and allocate computing power to the working module; and / or, According to the current signal transmission state, a target interface for transmitting the signal in the signal processing module is determined, and computing power is allocated to the target interface.

[0015] Optionally, after allocating computing power to the working module and / or allocating computing power to the target interface, the method further includes: Control the supply voltage of the target module according to the computing power distribution.

[0016] Compared with the prior art, this application has the following technical effects: 1. The electro-optical signal conversion device converts the electrical signal of the device under test into an optical signal, which can be transmitted through the optical fiber to avoid the influence of electromagnetic coupling; moreover, the device under test does not need to have an optical fiber interface, and has a wide applicability.

[0017] 2. The input module can combine and encode at least two signals of the device under test, allowing at least two signals of the module under test to be simultaneously converted from electrical to optical and sent out through optical fiber, with the ability of parallel input and processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a schematic diagram of an application scenario of the electro-optical signal conversion device provided in an embodiment of the present application; Figure 2 It is a structural schematic diagram of an electro-optical signal conversion device provided in an embodiment of the present application; Figure 3 is a structural schematic diagram of another electro-optical signal conversion device provided in an embodiment of the present application; Figure 4 It is a flow chart of an electro-optical signal conversion method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the present disclosure clearer, the technical scheme in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments. The components of the embodiments of the present disclosure generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present disclosure provided in the drawings is not intended to limit the scope of the present disclosure for protection, but merely represents the selected embodiments of the present disclosure. Based on the embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present disclosure.

[0021] In order to facilitate the introduction of the electro-optical signal conversion device provided in the embodiment of the present application, see Figure 1 ,First, the application scenarios of the device are introduced.

[0022] In the electromagnetic compatibility (EMC) test, the microwave darkroom is used to simulate a non-reflective environment to accurately measure the electromagnetic radiation and anti-interference ability of the device. Assuming that the device under test is a car, it is necessary to test the electromagnetic compatibility of the car in the microwave darkroom. It is necessary to read the signal of the domain controller of the car, lead the signal out of the microwave darkroom, and analyze the signal, and determine the electromagnetic compatibility of the car based on the analysis results. The signal sent by the domain controller may be a digital signal or an analog signal. This embodiment uses an electro-optical signal conversion device to convert digital signals and / or analog signals into optical signals. The optical signal is then transmitted out of the microwave darkroom through an optical fiber. Outside the microwave darkroom, the optical signal is converted into an electrical signal by an optoelectronic conversion device, and the electrical signal is analyzed by the host computer to restore the digital signal and / or analog signal output by the domain controller.

[0023] Using a microwave darkroom for electromagnetic compatibility testing, combined with electro-optical conversion and fiber optic transmission, can effectively reduce interference and ensure the accuracy of test results. It is suitable for high-frequency signal transmission and long-distance testing scenarios.

[0024] Figure 2 1 is a schematic diagram of the structure of an electro-optical signal conversion device provided in an embodiment of the present application, including an input module, a signal processing module, an electro-optical conversion module and a main control signal chip. Figure 2 The structure and function of each module are introduced in detail.

[0025] The input module is connected to at least two signal output interfaces of the device under test, and transmits at least two signals of the device under test to the signal processing module. This embodiment does not limit the type of the device under test and the type of the signal output interface of the device under test. The type of the signal output interface of the input module should include the type of the output interface of the device under test, so as to be compatible with the device under test.

[0026] After the signal is connected to the input module, it enters the signal processing module through the transmission line on the circuit. Optionally, the signal processing module can be an FPGA chip. FPGA (Field-Programmable Gate Array) is a semiconductor device that can be programmed to implement specific functions. Unlike fixed-function ASICs, FPGAs allow users to configure their logic functions as needed, and are widely used in prototyping, rapid development, and customized hardware solutions. FPGAs configure their internal logic units and interconnection resources through programming to implement specific functions. Users use hardware description languages ​​(HDL) such as Verilog or VHDL to write logic designs, generate configuration files through synthesis tools, and load them into FPGAs to complete configuration. This embodiment uses FPGA chips to perform signal conversion. Based on the high parallel computing capability of FPGA chips, the entire network optical conversion system can maintain a low-latency working state when multiple signals are input simultaneously.

[0027] The signal processing module combines and encodes at least two signals to generate an electrical signal. For example, at least two signals are decoded and combined in the signal processing module at the same time. The combination of digital electrical signals and analog electrical signals can be compatible with different output interfaces of various devices under test, broadening the scope of application. After the signals are combined and encoded, the encoded signals are transmitted to the electro-optical conversion module in the form of high-speed and high-bandwidth electrical signals.

[0028] The electro-optical conversion module converts the electrical signal into an optical signal that can be transmitted in the optical fiber, and then transmits it in the form of a single optical fiber to the optical signal receiving end located outside the microwave darkroom.

[0029] The main control chip can be a single-chip microcomputer, which is connected to the input module, the signal processing module, and the electro-optical conversion module. According to the current signal transmission state, the working mode of at least one of the input module, the signal processing module, the main control chip and the electro-optical conversion module is controlled. Optionally, the working mode includes an overall sleep mode, a partial sleep mode and a full working mode. Different power is allocated to each module in different working modes, so that the computing power of the device can be fully utilized and a faster computing speed can be obtained under the same power consumption; secondly, in scenarios where the computing speed is not required, only a small part of the computing power is used to reduce the power consumption of the device and extend the use time of a single charge.

[0030] Compared with the prior art, this application has the following technical effects: 1. The electro-optical signal conversion device converts the electrical signal of the device under test into an optical signal, which can be transmitted through the optical fiber to avoid the influence of electromagnetic coupling; moreover, the device under test does not need to have an optical fiber interface, and has a wide applicability.

[0031] 2. The input module can combine and encode at least two signals of the device under test, allowing at least two signals of the module under test to be simultaneously converted from electrical to optical and sent out through optical fiber, with the ability of parallel input and processing.

[0032] Optional, see Figure 3 The electro-optical signal conversion device in the embodiment of the present application also includes a signal output module, which can be integrated with the electro-optical conversion module or independent of the electro-optical conversion module. The signal output module receives the optical signal sent by the electro-optical conversion module and controls whether the optical signal is transmitted to the external optical fiber. For example, when the output signal is not needed after the test is completed, the output of the optical signal is turned off. After the test starts, the output of the optical signal is turned on. The signal output module is a connection node for the external optical fiber and is a conversion point for the optical signal from the internal transmission path to the external transmission path.

[0033] This embodiment can re-encode the information in multiple input signals and output the information simultaneously through a high-bandwidth optical fiber, thereby having good high-parallel output capability.

[0034] Optionally, the electro-optical conversion module includes a pre-processing circuit, a laser driver and a laser connected in sequence. The pre-processing circuit pre-processes the electrical signal to obtain a processed signal, and transmits the processed signal to the laser driver; the laser driver generates a modulation current according to the processed signal, and sends the modulation current to the laser; the laser performs electro-optical conversion on the modulation current to generate an optical signal.

[0035] In a specific embodiment, the electrical signal input to the electro-optical conversion module is usually a differential electrical signal. The input differential electrical signal will first be sent to a preprocessing circuit, which is responsible for performing necessary amplification, shaping and other processing on the signal to ensure that the quality of the signal meets the requirements of subsequent conversion. The preprocessed electrical signal is sent to the laser driver, and the laser driver generates a corresponding modulation current according to the change of the logic level of the input signal. The function of the modulation current is to control the luminous intensity of the laser and realize the modulation of the optical signal. There are two main modulation methods: direct modulation and external modulation. The modulation current is applied to the laser, such as FP laser, DFB laser or VCSEL, which emits optical signals of corresponding intensity under the action of the current. The intensity of the optical signal corresponds to the logic level of the input electrical signal, realizing electro-optical conversion.

[0036] Optional, see Figure 3 The electro-optical signal conversion device in the embodiment of the present application also includes a power supply module, which is responsible for all power supply-related work in the device. The power output to other modules is allocated according to the real-time situation to ensure the safe and stable operation of each module.

[0037] Optionally, the input module includes at least two of the following interfaces: 1) Gigabit Ethernet T1 (1000Base-T1) interface. 1000Base-T1 is a communication standard for automotive Ethernet, supports a data transmission rate of 1 Gbps, and is mainly used for high-speed data transmission in vehicle networks. This embodiment may be an 8-channel 1000Base-T1 interface.

[0038] 2) Gigabit Ethernet Tx (1000Base-Tx) interface, 1000Base-Tx is an Ethernet standard that supports a data transmission rate of 1 Gbps and is generally used for high-speed data transmission in a local area network (LAN). This embodiment may be a 2-channel 1000Base-T1 interface.

[0039] 3) CAN and CANFD interfaces, CAN: Controller Area Network, a serial communication protocol used for automotive and industrial control. CANFD: CAN Flexible Data-rate, an extended version of the CAN protocol, supports higher data transmission rates and larger data frames. This embodiment can be 12-channel CAN and CANFD.

[0040] 4) Local Interconnect Network (LIN) interface: LIN (Local Interconnect Network) is a low-cost vehicle network protocol, usually used for low-speed communication in automobiles, such as control of sensors and actuators. This embodiment can be a 6-channel LIN.

[0041] 5) Automotive Audio Bus Interface, A2B (Automotive Audio Bus) is a digital bus protocol for automotive audio systems that supports high-bandwidth audio data transmission. This embodiment can be a 2-channel A2B.

[0042] 6) Low-voltage differential signal interface, LVDS (Low-Voltage Differential Signaling) is a low-voltage differential signal transmission technology used for high-speed data transmission, usually used for video transmission and high-speed data communication. This embodiment can be a 4-channel LVDS.

[0043] 7) Camera Serial Interface. CSI (Camera Serial Interface) is a serial interface standard used to transmit image data between cameras and image sensors and processors. This embodiment can be a 12-channel CSI.

[0044] 8) Analog signal interface. The analog signal on the vehicle domain controller is mainly used to process continuously changing signals, such as sensor signals and motor control signals. In this embodiment, it can be a 4-channel 1MHz analog signal interface.

[0045] Optionally, all interfaces of the input module are arranged on one side of the device. At the same time, attention should be paid to the interference between the interfaces. The space required for each interface should be confirmed during the design phase, and sufficient plug placement space and plug-in and pull-out space should be reserved to ensure that all wiring harnesses can be connected at the same time; at the circuit level, attention should be paid to the fact that the signals of each channel do not interfere with each other and can be transmitted stably at the same time.

[0046] The electrical-optical signal conversion device in this embodiment has 8 1000Base-T1, 2 1000Base-Tx, 12 CAN and CANFD, 6 Lin, 2 A2B, 4 LVDS, 12 CSI, and 4 1MHz analog signal outputs. It can be seen that the device has a rich output interface for digital electrical signals and digital analog signals, but does not have an optical signal output interface, so a converter is needed to simultaneously convert multiple digital and analog electrical signals into optical signals that can be transmitted in optical fibers.

[0047] The present application also provides an electro-optical signal conversion method, which uses the electro-optical signal conversion device provided in the above embodiment. This method is executed by the main control chip, see Figure 4 , the method provided in this embodiment includes the following operations: S110, obtaining the current signal transmission state of the target module, wherein the target module is at least one of an input module, a signal processing module, a main control chip, and an electro-optical conversion module.

[0048] The current signal transmission status is the status of whether various signals supported by the electro-optical signal conversion device are transmitted. For example, the 1MHz analog signal is in the transmission state, and the CAN signal is in the non-transmission state.

[0049] S120. According to the current signal transmission state, control the target module to enter a working mode corresponding to the current signal transmission state.

[0050] The target module has the ability to process multiple signals. However, if there are fewer or no signals being transmitted, the power of the target module can be reduced and the electro-optical signal conversion device enters a low power consumption state.

[0051] The following describes in detail several working modes of the target module and the corresponding control methods.

[0052] 1) In the overall sleep mode, all target modules are in a low power consumption state and require less power supply. If all signals are not currently transmitted and the duration exceeds the set duration, all modules in the electro-optical signal conversion device are controlled to enter the overall sleep mode. When the device is in the overall sleep mode, if a signal input is detected, each target module is controlled to enter the operation mode.

[0053] 2) Operation mode, all target modules are in normal working state, requiring more power supply to reach rated power. Optionally, if all signals are currently in transmission state, the target mode is controlled to enter operation mode.

[0054] 3) Partial sleep mode: some functions / circuits of the target module are in operation and require power supply; other functions / circuits are not in operation and do not require power supply. If some signals are currently in transmission, the target module is controlled to enter partial sleep mode. Taking the input module as an example, since the device has many input interfaces, not all of them will be used at the same time in some cases. For unused input interfaces, the power supply of the internal signal conversion circuit can be cut off to reduce the power consumption.

[0055] This embodiment controls the target module to enter different working modes. When there are many signals connected at the same time, the input power of the target module (such as the electro-optical conversion module and the main control chip) is increased to ensure that it can be in a full-speed operation state; when there are only a few signals input, the input power of the target module (such as the electro-optical conversion module and the main control chip) can be reduced to put it in a low-power, low-computing power operation state, thereby ensuring the stable operation of the device and extending its battery life.

[0056] Optionally, the main control chip is responsible for the charge and discharge management of the power module to ensure the safe and stable operation of the power module. For example, when the power module needs to be charged, the power indicator light on the control device flashes. After the power module is fully charged, the control charging circuit is disconnected to avoid overcharging.

[0057] Optionally, the current signal transmission state can be detected in the following two optional ways to control the target module to enter the corresponding working mode: The first option is to set the status bit in the control software of the main control chip. Each target module has an independent status bit (for example, an integer between 0 and 10). The status bit indicates whether the target module is in working state and the workload. For example, the status bit of the input module is 10, indicating that all interfaces of the input module have signal input. The status bit of the electro-optical conversion module is 0, indicating that no signal is undergoing electro-optical conversion. The status of the signal processing module is 5, indicating that 50% of the signals supported by the device are undergoing signal merging and other processing.

[0058] Then, the main control chip determines the status bit of each target module according to the current signal transmission status. For example, the main control chip detects the working status and workload of each target module and updates the status bit of each target module. Then, the main control chip controls the working mode of each target module according to the status bit of each target module. If the status bit is 0, it enters the overall sleep mode; if the status bit is 10, it enters the running mode; if the status bit is between 0 and 10, it enters the partial sleep mode.

[0059] The second optional method: detect whether the target module is in working state and the workload through the working state detection circuit of the target module; control the working mode of the target module according to whether the target module is in working state and the workload. For example, if some input interfaces in the input module have no signal input and the workload is 0, the power supply of these input interfaces is cut off.

[0060] Optionally, in addition to controlling the power of the target module according to the current signal transmission status, this embodiment also distributes computing power to all working modules.

[0061] For example, after the current signal transmission state of the target module is acquired, the first process and / or the second process is executed.

[0062] The first process: Applicable to the allocation of computing power between different target modules. According to the current signal transmission status, determine the working module and allocate computing power to the working module. For example, when encoding and merging signals, use the computing power of the electro-optical conversion module for parallel calculation to reduce the calculation time. When controlling the charging and discharging points of the power module, controlling the laser, and switching the working mode, use the computing power of the main control chip for serial calculation.

[0063] The second process: Applicable to the computing power allocation within the signal processing module. According to the current signal transmission status, determine the target interface for transmitting signals in the signal processing module, and allocate computing power to the target interface. For example, when all input interfaces have signal input, the computing power of the electro-optical conversion module can be evenly distributed to each input channel for high-speed computing. When only a few interfaces have signal input, there are two ways of allocation: one is to allocate all the computing power of the electro-optical conversion module to these input interfaces, greatly shortening the computing time; the other is to idle most of the computing power and only allocate a small amount of computing power to these input interfaces, running at low power consumption and low speed.

[0064] The advantages of the computing power allocation solution provided in this embodiment are: first, the computing power of the device is fully utilized to obtain a faster computing speed under the condition of the same power consumption; second, in scenarios where the computing speed requirement is not high, only a small part of the computing power is used, which reduces the power consumption of the device and extends the usage time of a single charge.

[0065] Optionally, after computing power is allocated to the working modules and / or target interfaces, the power supply voltage of the target module is controlled according to the computing power allocation. The control principle of the power supply voltage is to allocate low voltage to low computing power and high voltage to high computing power. For example, for the main control chip and the electro-optical conversion module, a lower voltage can be used for power supply in the case of low-speed operation, while a higher voltage needs to be input to provide greater input power in the case of high-speed operation. For the input module and the signal processing module, when the number of input signal paths is small, the amount of signal merging and encoding operations required is low, and the power supply voltage of these modules can be reduced to reduce power consumption while ensuring normal operation.

[0066] In summary, compared with the prior art, the beneficial effects of this technical solution are as follows: 1) Multiple signals can be input simultaneously: Multiple digital / analog signals output from the device under test (such as a domain controller) can be simultaneously connected to the electro-optical signal conversion device, undergo signal conversion, and be sent out through optical fiber, with high parallel input capability.

[0067] 2) Low latency: The embodiment of the present application uses an FPGA chip to perform signal conversion. Based on the high parallel computing capability of the FPGA chip, the entire network optical conversion system can maintain a low latency working state when multiple signals are input simultaneously.

[0068] 3) High parallel output: The embodiment of the present application can re-encode the information in multiple input signals and output the information simultaneously through a high-bandwidth optical fiber, thus having good high parallel output capability.

[0069] 4) Highly adaptable domain controller used in the test: The embodiment of the present application can cover all signal output types of the tested device, and can simultaneously access the same number of signals as the output of the tested device. For the tested devices commonly used in electromagnetic compatibility tests, it has excellent compatibility and plug-and-play performance.

[0070] 5) Low power consumption and long battery life: By controlling each target module to enter the overall sleep mode, partial sleep mode, and performing computing power allocation and voltage regulation, the overall power consumption of the device can be reduced, the load on the power module is small, and the battery life is long. In some cases, the device can adapt to 8-36V power input.

[0071] 6) Combined with actual usage scenarios, EMC testing usually takes a long time and may cover the entire working period. The device can automatically enter low power consumption mode during test breaks to meet intermittent testing requirements of up to 8 hours.

[0072] Based on the above technical effects, this embodiment has a wide range of application scenarios in the electromagnetic compatibility testing of automotive electronic systems, consumer products and other network electronic products. With the rapid development of the electric vehicle market, automotive electronic systems are becoming increasingly complex, and the vehicle workload required in research and development is also increasing rapidly. The embodiment of the present application can transmit multiple signals at the same time and has the ability to work continuously for a long time, which can greatly improve the test efficiency of electromagnetic compatibility tests and accelerate the research and development efficiency of automotive electronic systems. At the same time, due to the high adaptability of the embodiment of the present application to common controller devices in the field of automotive electronics, the operating steps of testers can be simplified, the workload can be reduced, and the probability of errors in the test can be reduced. In summary, the embodiment of the present application has high applicability and broad market prospects, and has a strong special and irreplaceable position in this category of test equipment.

[0073] It should be noted that the terms used in this application are only for describing specific embodiments, rather than limiting the scope of this application. As shown in the specification of this application, unless the context clearly indicates an exception, the words "one", "a", "a kind of" and / or "the" do not specifically refer to the singular, but may also include the plural. The terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method or device. In the absence of more restrictions, the elements defined by the sentence "include one..." do not exclude the presence of other identical elements in the process, method or device including the elements.

[0074] The term "and / or" herein only describes an association relationship, indicating that three relationships may exist. For example, A and / or B may represent the following three situations: A exists alone, A and B exist at the same time, and B exists alone. In addition, the term "at least one" herein represents any combination of at least two of any one or more of a plurality of. For example, including at least one of A, B, and C may represent including any one or more elements selected from the set consisting of A, B, and C.

[0075] The terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the invention of this application, unless otherwise specified, the meaning of "plurality" is two or more.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the technical solutions of the embodiments of the present application.

Claims

1. An electro-optical signal conversion device, characterized in that: include: An input module, connected to at least two signal output interfaces of the device under test, and used to transmit at least two signals of the device under test to the signal processing module; The signal processing module is used to combine and encode the at least two signals to generate an electrical signal, and transmit the electrical signal to the electrical-optical conversion module; An electro-optical conversion module, used for converting the electrical signal into an optical signal; The main control chip is used to control the working mode of at least one of the input module, the signal processing module, the main control chip and the electro-optical conversion module according to the current signal transmission state.

2. The electro-optical signal conversion device according to claim 1, characterized in that: Also includes: The signal output module is used to control whether the optical signal is transmitted to the external optical fiber.

3. The electro-optical signal conversion device according to claim 1, characterized in that: The electro-optical conversion module comprises: A preprocessing circuit, used for preprocessing the electrical signal to obtain a processed signal, and transmitting the processed signal to the laser driver; The laser driver is used to generate a modulation current according to the processed signal and send the modulation current to the laser; The laser is used to perform electrical-to-optical conversion on the modulated current to generate an optical signal.

4. The electro-optical signal conversion device according to any one of claims 1 to 3, characterized in that: The input module includes at least two of the following interfaces: Gigabit Ethernet T1 interface, Gigabit Ethernet Tx interface, Controller Area Network CAN and CANFD interface, Local Interconnect Network interface, Car Audio Bus interface, Low Voltage Differential Signal interface, Camera serial interface and analog signal interface.

5. An electro-optical signal conversion method, characterized in that: Using the electro-optical signal conversion device according to any one of claims 1 to 4, the method comprises: Get the current signal transmission status of the target module; According to the current signal transmission state, controlling the target module to enter a working mode corresponding to the current signal transmission state; The target module is at least one of an input module, a signal processing module, a main control chip and an electro-optical conversion module.

6. The method according to claim 5, characterized in that The working modes include at least a whole sleep mode, a partial sleep mode and a running mode; According to the current signal transmission state, controlling the target module to enter a working mode corresponding to the current signal transmission state includes: If all current signals are in a non-transmitting state and the duration of the non-transmitting state exceeds a set duration, all modules in the electro-optical signal conversion device are controlled to enter an overall sleep mode; If the current partial signal is in a transmission state, controlling the target module to enter a partial sleep mode; If all current signals are in the transmission state, the target mode is controlled to enter the running mode.

7. The method according to claim 5, characterized in that According to the current signal transmission state, controlling the target module to enter a working mode corresponding to the current signal transmission state includes: Determine the status bit of each target module according to the current signal transmission status; wherein the status bit indicates whether the target module is in a working state and the workload; According to the status bit of each target module, the working mode of the target module is controlled.

8. The method according to claim 5, characterized in that According to the current signal transmission state, controlling the target module to enter a working mode corresponding to the current signal transmission state includes: Detecting whether the target module is in a working state and the workload through a working state detection circuit of the target module; The working mode of the target module is controlled according to whether the target module is in a working state and the workload.

9. The method according to any one of claims 5 to 8, characterized in that: After obtaining the current signal transmission status of the target module, it also includes: Determine the working module according to the current signal transmission state, and allocate computing power to the working module; and / or, According to the current signal transmission state, a target interface for transmitting the signal in the signal processing module is determined, and computing power is allocated to the target interface.

10. The method according to claim 9, characterized in that After allocating computing power to the working module and / or allocating computing power to the target interface, the method further includes: Control the supply voltage of the target module according to the computing power distribution.

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