Dual path relay and method of using same

Abstract

This invention relates to the field of relay technology and discloses a dual-channel relay and its usage method. The dual-channel relay includes an input interface module, a power protection and voltage regulation module, a main control module, and a dual-channel solid-state output module. The input interface module receives external control signals and converts them into corresponding input signals. The power protection and voltage regulation module provides reverse connection protection for the external power supply and provides operating power to the main control module. The main control module is connected to the input interface module and is used to determine the input signals and generate control signals for controlling the dual-channel output. By employing a fully electronic solid-state switch structure and combining it with the control logic of the main control module, dual-channel output control of the first and second solid-state output branches is achieved. When the output circuit is in a conducting state, it is not necessary to maintain continuous coil energization, thereby effectively reducing the power consumption of the dual-channel relay under continuous conducting conditions.

Description

Technical Field

[0001] This invention relates to the field of relay technology, specifically to a dual-channel relay and its usage method. Background Technology

[0002] A relay is an electrical device used to control the switching on and off of circuits. It is widely used in vehicle control systems, industrial control equipment, and various electrical devices to connect and disconnect load circuits. With the increasing integration of electronic systems, single-output channel relays are no longer sufficient to meet the application requirements of multi-loop control. Therefore, dual-channel relays, which can control two output circuits simultaneously, are increasingly being used. Dual-channel relays are typically used to control two load circuits under the same control unit to achieve multi-loop linkage or independent control, making them suitable for applications with high requirements for space utilization and control flexibility.

[0003] Most existing dual-channel relays adopt a mechanical contact structure, using a coil to drive the mechanical contacts to control the on / off state of the two output circuits. However, in actual use, when the output circuits are in a conducting state for a long time, the continuous energization of the coil in this type of dual-channel relay will generate significant power consumption. This not only increases the overall energy consumption of the device but also easily leads to increased relay temperature rise, thus affecting its long-term operational stability and service life. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a dual-channel relay and its usage method, which solves the problem of high power consumption when the output circuit of a dual-channel relay is continuously conducting in automotive applications.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a dual-channel relay, comprising an input interface module, a power protection and voltage regulation module, a main control module, and a dual-channel solid-state output module. The input interface module receives external control signals and converts them into corresponding input signals. The power protection and voltage regulation module provides reverse connection protection for external power supply and supplies operating power to the main control module. The main control module is connected to the input interface module and is used to determine the input signals and generate control signals for controlling the dual-channel output. The dual-channel solid-state output module includes a first solid-state output branch and a second solid-state output branch. The first solid-state output branch and the second solid-state output branch are respectively connected to the main control module and, under the action of the control signals, control the on / off state of external loads.

[0006] Preferably, the main control module is implemented by a control logic circuit composed of a microcontroller or discrete components, and is used to generate control signals for controlling the dual-channel solid-state output module according to the input signals.

[0007] Preferably, the input interface module includes a control signal input terminal, a resistor conversion network, and a filtering unit. The resistor conversion network is used to convert the control signal into a voltage signal for sampling by the main control module, and the filtering unit is disposed between the resistor conversion network and the main control module.

[0008] Preferably, the power protection and voltage regulation module includes a reverse connection protection unit, which is located between the external power supply terminal and the main control module.

[0009] Preferably, the main control module is configured to generate a control signal for controlling the first solid-state output branch and the second solid-state output branch when it is determined that the input signal meets a preset condition, wherein the preset condition includes at least one of a current condition or an input signal condition.

[0010] Preferably, the first solid-state output branch and the second solid-state output branch each include a power semiconductor switching device and its driving circuit, and the power semiconductor switching device operates under the control signal output by the main control module.

[0011] Preferably, the first solid-state output branch and the second solid-state output branch are each provided with a reverse voltage suppression unit.

[0012] Preferably, the dual-channel relay further includes a current detection module, which is used to detect the operating current of at least one of the first solid-state output branch and the second solid-state output branch, and provide the detection result to the main control module, which makes control decisions based on the detection result.

[0013] Preferably, the main control module is configured to start a timing process corresponding to the first solid-state output branch or the second solid-state output branch when the first solid-state output branch or the second solid-state output branch is in a conducting state. The timing process is started or terminated according to the main control module's judgment on the output result of the current detection module.

[0014] Preferably, the method includes the following steps:

[0015] S1. Receive external control signals through the input interface module and convert the external control signals into input signals that the main control module can sample;

[0016] S2. The main control module determines the input signal;

[0017] S3. When it is determined that the input signal meets the preset conditions, the main control module generates a control signal for controlling the dual-channel solid-state output module.

[0018] S4. Based on the first control signal, control the load of the first solid-state output branch to switch on and off; based on the second control signal, control the load of the second solid-state output branch to switch on and off.

[0019] S5. When the first solid-state output branch or the second solid-state output branch is in the conducting state, the main control module starts the timing process corresponding to the output branch.

[0020] This invention provides a dual-channel relay and its usage method. It has the following beneficial effects:

[0021] 1. In this invention, by adopting a fully electronic solid-state switch structure and combining it with the control logic of the main control module, dual-channel output control of the first solid-state output branch and the second solid-state output branch is realized. When the output circuit is in the conducting state, it is not necessary to keep the coil continuously energized, thereby effectively reducing the power consumption of the dual-channel relay under continuous conducting conditions, reducing the burden on the vehicle power system, and improving the stability and applicability of the dual-channel relay during long-term operation.

[0022] 2. In this invention, the dual solid-state output branches are uniformly scheduled and managed separately by the main control module, enabling the dual relays to achieve single-ended output, dual-ended synchronous output, or dual-ended asynchronous output according to the control strategy. This allows the output mode requirements of different application scenarios to be met under the same hardware structure, thereby improving the application flexibility and functional adaptability of dual relays in vehicle control systems.

[0023] 3. In this invention, by introducing a current detection module, the main control module can make control judgments based on the working current state during the conduction period of the output branch, thereby controlling the output branch when abnormal operating conditions or conduction time reaches the preset conditions, improving the controllability and operational reliability of the dual-channel relay for the working state of the output circuit. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the system architecture of the present invention;

[0025] Figure 2 This is a schematic diagram of the circuit principle of the present invention;

[0026] Figure 3 This is a schematic diagram of the method flow of the present invention. Detailed Implementation

[0027] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Please see the appendix Figure 1 and Figure 2 This invention provides a dual-channel relay, including an input interface module, a power protection and voltage regulation module, a main control module, and a dual-channel solid-state output module. The input interface module receives external control signals and converts them into corresponding input signals. The power protection and voltage regulation module provides reverse connection protection for external power supply and provides operating power to the main control module. The main control module is connected to the input interface module and is used to determine the input signals and generate control signals for controlling the dual-channel output. The dual-channel solid-state output module includes a first solid-state output branch and a second solid-state output branch. The first solid-state output branch and the second solid-state output branch are respectively connected to the main control module and perform on / off control on external loads under the action of the control signals.

[0029] Specifically, the modules are electrically connected to form a complete control system, which is used to control the on / off state of the external load circuit under the action of external control signals.

[0030] During operation, the external power supply is connected to the circuit through the power protection and voltage regulation module. The power protection and voltage regulation module provides reverse connection protection for the external power supply and supplies working power to the main control module, thereby ensuring the electrical safety of the main control module under abnormal power supply conditions and its stable operation under normal power supply conditions.

[0031] External control signals are input to the dual-channel relays via the input interface module. The input interface module converts and processes the external control signals, generating corresponding input signals which are then provided to the main control module. The main control module is electrically connected to the input interface module to determine the input signals and, when the determination meets preset conditions, generates control signals for controlling the dual-channel outputs.

[0032] The dual-solid-state output module includes a first solid-state output branch and a second solid-state output branch, both of which are connected to the main control module. Under the control signal output by the main control module, the first and second solid-state output branches control the on / off state of the external load, thereby achieving on / off management of the external load circuit. Since the two solid-state output branches are independently controlled by the main control module, the dual-channel relay can perform independent or combined on / off control of different external load circuits based on the judgment result of the input signal.

[0033] Through the above structure and control relationship, the dual-channel relay of the present invention achieves solid-state control of dual-output circuits, forming a complete control link of input signal—main control decision—dual-channel output execution. The dual-channel relay uses power semiconductor switching devices Q1 and Q2 as output execution devices to achieve solid-state on / off control. The input interface module converts external control signals and provides them to the main control module for decision-making. The power protection and voltage regulation module provides stable power to the main control module through reverse connection protection and filtering suppression devices. The output terminal uses suppression devices D3 and D4 to suppress electrical impacts on the external load circuits, thereby achieving independent on / off control of the two external load circuits and meeting the circuit implementation requirements for power protection, signal stability, and load adaptation in automotive applications.

[0034] Please see the appendix Figure 1 and Figure 2 The main control module is implemented by a control logic circuit composed of a microcontroller or discrete components;

[0035] Specifically, by limiting the main control module to a control logic circuit composed of a microcontroller or discrete components, the microcontroller executes preset control logic, judges the input signals, and generates output control signals. This allows the input signal judgment and output control of the dual-channel relay to be completed by the logic circuit, thereby achieving unified control of the dual solid-state output branches at the logic level. This structure enables dual-channel output control to not rely on mechanical contacts or fixed electrical connections, but rather generate control signals through logical judgment, thus improving the consistency and flexibility of dual-channel output control.

[0036] Please see the appendix Figure 1 and Figure 2 The input interface module includes a control signal input terminal, a resistor conversion network, and a filtering unit. The resistor conversion network is used to convert the control signal into a voltage signal for sampling by the main control module, and the filtering unit is located between the resistor conversion network and the main control module.

[0037] Specifically, the control signal input terminal consists of external terminals I3, I4, and I5, used to connect to external control signal lines. After the external control signal is input through the control signal input terminal, it enters the resistor conversion network electrically connected to it. Through the sequential arrangement of the control signal input terminal, resistor conversion network, and filtering unit, the input signal input, conversion, and stabilization are completed sequentially in the structure, thus forming a clear and reproducible input signal processing flow.

[0038] The resistor conversion network consists of resistors R16, R18, R19, R22, R13, R5, R6, and R7. The connections between these resistors form voltage conversion nodes, used to convert external control signals into voltage signals for sampling by the main control module. By matching the resistance values ​​of the resistors, a correspondence between the external control signal and the voltage signal is established at the electrical level, ensuring that the converted voltage signal is within the sampleable range of the main control module. By setting up the resistor conversion network, the external control signal is electrically converted into a voltage signal for sampling by the main control module, thereby guaranteeing that the main control module can effectively sample the external control signal.

[0039] The filtering unit consists of capacitors C3, C4, and C5. It is positioned between the resistor conversion network and the main control module and is electrically connected to the voltage conversion node of the resistor conversion network. By placing the filtering unit between the resistor conversion network and the main control module, the voltage signal generated by the resistor conversion network is filtered, reducing the impact of transient interference in the input signal on the sampling results of the main control module. The voltage signal, converted by the resistor conversion network and filtered by the filtering unit, is provided to the input port of the main control module for subsequent signal sampling and judgment.

[0040] Based on the above structure, during operation, external control signals are first connected to the input interface module through the control signal input terminal. After being processed by the resistor conversion network, the external control signals are electrically converted into voltage signals corresponding to the control signals. Subsequently, before entering the main control module, the voltage signals are filtered by the filtering unit to form a stable input voltage signal for the main control module to sample.

[0041] Please see the appendix Figure 1 and Figure 2 The power protection and voltage regulation module includes a reverse connection protection unit, which is located between the external power supply terminal and the main control module.

[0042] Specifically, the external power supply is connected to the circuit through power input terminals I2 and I1. The reverse connection protection unit consists of power semiconductor device Q5 and diode D6. Power semiconductor device Q5 is placed in the external power supply circuit, and diode D6 and power semiconductor device Q5 are used to limit the operating state of the power semiconductor device.

[0043] When the external power supply polarity is correct, the power semiconductor device Q5 is in the on state. When the external power supply polarity is correct, the reverse connection protection unit establishes a power supply path, enabling the main control module to obtain working power. When the external power supply polarity is reversed, the power semiconductor device Q5 is in the off state, the reverse connection protection unit blocks the power supply path, and the external power supply is blocked, thereby preventing reverse voltage from entering the main control module.

[0044] By setting a reverse connection protection unit in the power supply path of the main control module, the main control module can only obtain working power when the external power supply polarity is correct, thereby protecting the main control module at the power supply level and improving the safety and reliability of the system power supply.

[0045] Please see the appendix Figure 1 and Figure 2 The main control module is configured to generate a control signal for controlling the first solid-state output branch and the second solid-state output branch when it is determined that the input signal meets the preset conditions. The preset conditions include at least one of current conditions or input signal conditions.

[0046] Specifically, after receiving the input signal from the input interface module, the main control module performs a judgment on the input signal. When the judgment result meets the preset conditions, the main control module generates a control signal for controlling the dual-channel solid-state output module and outputs the control signal to the first solid-state output branch and the second solid-state output branch to control the on / off state of the corresponding output branch.

[0047] The preset conditions include current conditions to reflect the operating state of the output branch and input signal conditions to reflect changes in the state of the external control signal. Based on the judgment results of the above conditions, the main control module determines whether to generate or terminate the corresponding control signal, thereby realizing the control of the first solid-state output branch and the second solid-state output branch.

[0048] The main control module determines the input signal and generates control signals for the first and second solid-state output branches when the determination result meets preset conditions. This allows the on / off states of the dual output branches to be managed by a unified control logic, thus achieving centralized control of the dual outputs. Since the preset conditions include at least one of current or input signal conditions, the main control module can control the output branches based on different types of determination conditions, providing a clear logical basis for the output control process and preventing the output branches from remaining continuously in a conducting state without determination condition constraints. Furthermore, by generating or terminating control signals based on the determination result, the on / off state of the output branches switches according to the change in the determination result, thereby improving the controllability and consistency of the dual output control.

[0049] Please see the appendix Figure 1 and Figure 2 The first solid-state output branch and the second solid-state output branch each include power semiconductor switching devices and their driving circuits. The power semiconductor switching devices operate under the control signals output by the main control module.

[0050] Specifically, the power semiconductor switching device in the first solid-state output branch is implemented by Q1, and its control terminal is connected to the output port of the main control module through a drive circuit. The power semiconductor switching device in the second solid-state output branch is implemented by Q2, and its control terminal is also connected to another output port of the main control module through a corresponding drive circuit. The drive circuit is used to apply the control signal output by the main control module to the control terminal of the power semiconductor switching device at the electrical level.

[0051] During operation, when the main control module outputs a control signal, the power semiconductor switching device in the corresponding branch enters a conducting or cutting-off state under the action of the control signal, thereby controlling the on / off state of the external load circuit of the corresponding output branch. When the main control module does not output a control signal, the corresponding power semiconductor switching device remains in a non-conducting state, and the output branch is in a disconnected state. By using the first and second solid-state output branches as execution units for the control signal, the on / off control of the external load circuit is realized.

[0052] By setting power semiconductor switching devices and their driving circuits in the first and second solid-state output branches respectively, the on / off state of the output branches is directly controlled by the control signal output by the main control module, thereby realizing independent control of the dual outputs. Since the power semiconductor switching devices operate under the action of the control signal, the on / off state of the output branches can switch with the change of the control signal, giving the control process of the dual outputs a clear execution path and response relationship, improving the consistency and controllability of the output control.

[0053] Please see the appendix Figure 1 and Figure 2 A reverse voltage suppression unit is provided in the first solid-state output branch and the second solid-state output branch respectively;

[0054] Specifically, the reverse voltage suppression unit in the first solid-state output branch is implemented by diode D3, and the reverse voltage suppression unit in the second solid-state output branch is implemented by diode D4. The reverse voltage suppression unit works in conjunction with the external load circuit of the corresponding output branch to suppress the reverse voltage generated in the load circuit when the on / off state of the output branch changes. When the output branch switches from the on state to the off state, a reverse voltage may be generated in the external load circuit. The reverse voltage suppression unit provides a release path for this reverse voltage, thereby limiting the amplitude of the reverse voltage in the output branch.

[0055] When the first solid-state output branch or the second solid-state output branch switches from the on state to the off state, the reverse voltage suppression unit functions in the corresponding output branch to suppress the reverse voltage generated in the external load circuit, thereby preventing the reverse voltage from acting on the power semiconductor switching device and its drive circuit.

[0056] By setting reverse voltage suppression units in the first and second solid-state output branches respectively, the reverse voltage generated during the switching process of the output branches is effectively limited, thereby improving the stability of the power semiconductor switching devices and the output branches. Simultaneously, since the two output branches each have a separate reverse voltage suppression unit, the two outputs are structurally independent, preventing the reverse voltage of one output branch from affecting the other.

[0057] Please see the appendix Figure 1 and Figure 2 The dual-channel relay also includes a current detection module, which is used to detect the operating current in the first solid-state output branch and the second solid-state output branch, and provides the detection result to the main control module. The main control module makes control decisions based on the detection result.

[0058] Specifically, the current detection module is integrated into the dual-channel relay, enabling real-time monitoring of the operating current of the output branch by acquiring its electrical status information. During the operation of the output branch, the current detection module monitors the operating current in either the first or second solid-state output branch and provides the detection results to the main control module. The main control module then makes control decisions based on the detection results, thereby achieving output control based on the operating current status.

[0059] When the output branch is in the conducting state, the current detection module generates a detection result reflecting the operating current state of the output branch and transmits this result to the main control module. After receiving the detection result from the current detection module, the main control module uses it as one of the bases for control decisions to determine whether the output branch is in a normal or abnormal operating state. Based on the detection result, the main control module can then adjust the control state of the output branch to manage its operation.

[0060] By incorporating a current detection module, the main control module can acquire information related to the operating current of the output branch in real time and make control decisions based on this information, thus providing a basis for overload and short-circuit detection of the output branch. Simultaneously, since the current detection module can detect the operating current in both the first and second solid-state output branches, the control of the dual output branches has feedback conditions based on the current state, improving the controllability and adaptability of the dual relays to the operating state of the output branches.

[0061] Please see the appendix Figure 1 , Figure 2 and Figure 3 The usage method of a dual-channel relay includes the following steps:

[0062] S1. Receive external control signals through the input interface module and convert the external control signals into input signals that the main control module can sample;

[0063] S2. The main control module determines the input signal;

[0064] S3. When the input signal is determined to meet the preset conditions, the main control module generates a control signal for controlling the dual-channel solid-state output module.

[0065] S4. According to the control signal, control at least one of the first solid-state output branch and the second solid-state output branch to switch on or off the external load.

[0066] Specifically, the dual-channel relay includes an input interface module, a power protection and voltage regulation module, a main control module, a dual-channel solid-state output module, and a current detection module. The dual-channel solid-state output module includes a first solid-state output branch and a second solid-state output branch. Each branch is equipped with a power semiconductor switching device and its driving circuit, and also includes a reverse voltage suppression unit. External power is supplied to the power protection and voltage regulation module through the power input terminal. The power protection and voltage regulation module includes a reverse connection protection structure, which is composed of a power semiconductor device and a diode. This structure establishes a power supply path when the external power supply polarity is correct and blocks the power supply path when the external power supply polarity is reversed. The power protection and voltage regulation module also filters and limits the power supply to provide a stable operating power supply for the main control module. External control signals are supplied to the input interface module through the input terminal. The input interface module includes a resistor conversion network and a filtering unit. The resistor conversion network converts the external control signal into a voltage signal that the main control module can sample. The filtering unit is located between the resistor conversion network and the main control module to suppress transient interference in the input signal and provide a stable input.

[0067] After the external control signal enters the input interface module via the control signal input terminal, it first passes through a resistor conversion network to form a voltage conversion node. The voltage of this voltage conversion node changes with the state of the external control signal and remains within the sampling range of the main control module. Then, the voltage conversion node is further filtered by a filtering unit to form a stable input signal, which is then provided to the input port of the main control module. Through resistor conversion and filtering, the main control module can identify the external control signal by sampling the voltage signal and reduce the impact of transient input fluctuations on the sampling results.

[0068] The main control module samples the input signals provided by the input interface module and determines the state of the input signals based on the sampling results. The determination includes whether the input signals meet preset conditions for triggering output control. These preset conditions include at least one of a current condition or an input signal condition. The input signal condition is used to define the valid state of the external control signal, while the current condition is used to determine the state based on the operating current state of the output branch.

[0069] When the main control module determines that the input signal meets the preset conditions, it generates a control signal. This control signal is output to the drive circuits of the first and second solid-state output branches. The drive circuits then apply the control signal from the main control module to the control terminals of the corresponding power semiconductor switching devices, causing the power semiconductor switching devices to enter either a conducting or cut-off state, thereby achieving controlled switching of the output branches.

[0070] Under the action of the control signal, the power semiconductor switching device in the first or second solid-state output branch is turned on, and the corresponding external load circuit is connected. When the control signal is removed, the corresponding power semiconductor switching device is turned off, and the external load circuit is disconnected. Each output branch is equipped with a reverse voltage suppression unit, which is implemented by a diode and is configured in conjunction with the switching node of the corresponding output branch. When the output branch switches from on to off, the reverse voltage suppression unit provides a release path for the reverse voltage generated by the load circuit, thereby limiting the amplitude of the reverse voltage in the output branch and preventing the reverse voltage from acting on the power semiconductor switching device and its driving circuit.

[0071] When the first solid-state output branch or the second solid-state output branch switches from a non-conducting state to a conducting state.

[0072] During the conduction of the output branch, the current detection module monitors the operating current status of at least one of the first solid-state output branch and the second solid-state output branch in real time, and provides the detection results to the main control module. The main control module then makes control decisions based on the detection results.

[0073] When the main control module determines that an output branch is in an abnormal operating state based on the detection results, it executes a disconnection control on the corresponding output branch. After the abnormal state is resolved, the main control module restores the output branch to the conducting state or keeps the output branch in the disconnected state according to the control strategy, so as to achieve self-recovery protection or locking protection.

[0074] Through the above steps, the dual-channel relay can convert external control signals into input signals that the main control module can sample. The main control module then generates control signals to drive the dual solid-state output branches to control the on / off state of the external load. Simultaneously, the reverse voltage suppression structure of each output branch limits the reverse voltage during switching, improving the stability of the output branch operation. A current detection module enables the main control module to make control decisions based on the operating state of the output branches and manage them in abnormal states, thereby achieving state-based control of the dual output branches.

[0075] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dual-channel relay, comprising an input interface module, a power protection and voltage regulation module, a main control module, and a dual-channel solid-state output module, characterized in that: The input interface module is used to receive external control signals and convert them into corresponding input signals. The power protection and voltage regulation module is used to provide reverse connection protection for external power supply and to provide working power to the main control module. The main control module is connected to the input interface module and is used to determine the input signals and generate control signals for controlling the dual-channel output. The dual-channel solid-state output module includes a first solid-state output branch and a second solid-state output branch. The first solid-state output branch and the second solid-state output branch are respectively connected to the main control module and, under the action of the control signals, control the on / off state of the external load.

2. The dual-channel relay according to claim 1, characterized in that, The main control module is implemented by a control logic circuit composed of a microcontroller and discrete components.

3. The dual-channel relay according to claim 1, characterized in that, The input interface module includes a control signal input terminal, a resistor conversion network, and a filtering unit. The resistor conversion network is used to convert the control signal into a voltage signal for sampling by the main control module. The filtering unit is disposed between the resistor conversion network and the main control module.

4. The dual-channel relay according to claim 1, characterized in that, The power protection and voltage regulation module includes a reverse connection protection unit, which is located between the external power supply terminal and the main control module.

5. The dual-channel relay according to claim 1, characterized in that, The main control module is configured to generate control signals for controlling the first solid-state output branch and the second solid-state output branch when it is determined that the input signal meets preset conditions, including at least one of current conditions or input signal conditions.

6. The dual-channel relay according to claim 1, characterized in that, The first solid-state output branch and the second solid-state output branch each include a power semiconductor switching device and its driving circuit, and the power semiconductor switching device operates under the control signal output by the main control module.

7. The dual-channel relay according to claim 1, characterized in that, The first solid-state output branch and the second solid-state output branch are respectively provided with reverse voltage suppression units.

8. The dual-channel relay according to claim 1, characterized in that, The dual-channel relay also includes a current detection module, which is used to detect the operating current in the first solid-state output branch and the second solid-state output branch, and provide the detection result to the main control module. The main control module makes control decisions based on the detection result.

9. The method of using a dual-channel relay, characterized in that, The method for a dual-channel relay according to any one of claims 1-8 comprises the following steps: S1. Receive external control signals through the input interface module and convert the external control signals into input signals that the main control module can sample; S2. The main control module determines the input signal; S3. When it is determined that the input signal meets the preset conditions, the main control module generates a control signal for controlling the dual-channel solid-state output module. S4. According to the control signal, control at least one of the first solid-state output branch and the second solid-state output branch to switch on and off to an external load; according to the first control signal, control the load of the first solid-state output branch to switch on and off; according to the second control signal, control the load of the second solid-state output branch to switch on and off.

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