Novel AC annunciator controller and annunciator control method

Abstract

The invention provides a novel AC annunciator controller and an annunciator control method, and the method comprises the steps: collecting the working current data of an annunciator in real time through a current collection module, and synchronously transmitting the working current data to an MCU1 and an MCU2; opening and closing state information of the safety relay is obtained through the relay node state acquisition module and is synchronously transmitted to the MCU1 and the MCU2; the working current data and the opening and closing state information of the safety relay are verified through the MCU1 and the MCU2 respectively, and when verification results are consistent, the working state of the signal machine is uploaded to interlocking equipment through an interlocking communication interface; according to a control command issued by interlocking equipment, a driving signal is generated and output to the series output control module; the series output control module comprises an execution circuit formed by connecting a first solid-state relay and a second solid-state relay in series; and when the MCU1 and the MCU2 simultaneously output conduction driving signals, the first solid-state relay and the second solid-state relay are synchronously conducted, and the signal machine is electrified to work. The working state of the annunciator can be correctly judged, and the annunciator is accurately and reliably controlled according to the command issued by the interlocking equipment.

Description

Technical Field

[0001] The present invention relates to the field of rail transportation technology, and in particular to a novel AC signal controller and a signal control method. Background Art

[0002] The signal controllers currently used in subways use a combination of solid-state relays and small safety relays to control signal lights. Although solid-state relays are contactless switches, they cannot be completely shut off. Even in the off state, there will be a weak leakage current. Currently, signal lights are all high-voltage and high-current devices. When solid-state relays and small safety relays are used in combination, the current may still exceed the limit parameters of the small safety relay.

[0003] In response to this situation, the signal control part is connected in series with the current acquisition part, and the results of the current acquisition are uploaded to the MCU. The MCU judges the current working status of the signal controller based on the collected current results and then takes corresponding actions.

[0004] However, these technologies fail to consider whether the relays in the signal controller are completely disconnected and cannot obtain real-time information about the signal's operating status, which can lead to erroneous signal on and off. Therefore, accurately determining the signal's operating status and shutting it down when necessary are urgent technical challenges facing signal controllers. Summary of the Invention

[0005] The present invention provides a novel AC signal controller and signal control method, which are used to solve the defects in the prior art that it is impossible to effectively judge whether the relay is completely disconnected, and the working status of the signal cannot be obtained in real time, which easily leads to the incorrect lighting and extinguishing of the signal light, so as to realize accurate judgment and control of the signal status.

[0006] The present invention provides a novel AC signal controller, comprising a current acquisition module, a relay node state acquisition module, a first microcontroller unit MCU1, a second microcontroller unit MCU2, a series output control module and an interlocking communication interface; The current acquisition module is connected in series in the signal control circuit, and is used to collect the working current data of the signal in real time, and synchronously transmit the working current data to the MCU1 and the MCU2; The relay node status acquisition module is connected to the feedback node of the safety relay, and is used to obtain the opening and closing status information of the safety relay, and synchronously transmit the opening and closing status information of the safety relay to the MCU1 and the MCU2; The MCU1 and the MCU2 are used to independently verify the received working current data and the opening and closing state information of the safety relay, respectively. When the verification results of the working current data and the opening and closing state information of the safety relay obtained by the MCU1 and the MCU2 are consistent, the signal machine working state is uploaded to the interlocking device through the interlocking communication interface; according to the control command issued by the interlocking device, a driving signal is generated and output to the series output control module; The series output control module includes an execution circuit consisting of a first solid-state relay and a second solid-state relay connected in series, wherein the driving end of the first solid-state relay is connected to the output pin of MCU1, and the driving end of the second solid-state relay is connected to the output pin of MCU2; the series output end of the first solid-state relay and the second solid-state relay is connected to the signal load; When MCU1 and MCU2 output the on-drive signal at the same time, the first solid-state relay and the second solid-state relay are turned on synchronously, and the signal machine is powered on and operates.

[0007] According to the new AC signal controller provided by the present invention, the current acquisition module includes a sampling resistor and an isolation amplifier. The sampling resistor is connected in series to the signal control circuit. The isolation amplifier collects the differential voltage across the sampling resistor and converts it into a current digital signal and outputs it to MCU1 and MCU2.

[0008] According to the novel AC signal controller provided by the present invention, the isolation amplifier adopts the AMC3302 chip.

[0009] According to the novel AC signal controller provided by the present invention, the relay node status acquisition module includes: A voltage divider circuit connected to a normally closed node of a safety relay; Two optocoupler isolation circuits connected in series, wherein the input end of the first optocoupler isolation circuit is connected to the output end of the voltage divider circuit, and the input end of the second optocoupler isolation circuit is connected in series to the output end of the first optocoupler isolation circuit; the output ends of the two optocoupler isolation circuits are respectively connected to the GPIO pins of MCU1 and MCU2; MCU1 and MCU2 are configured to send the same PWM wave to two optocoupler isolation circuits respectively, and determine the relay node status by comparing the phase offset of the two output PWMs.

[0010] According to the novel AC signal controller provided by the present invention, both of the two optical coupling isolation circuits use the optical coupler HMHA2801.

[0011] According to the novel AC signal controller provided by the present invention, the series output control module further includes a first driving transistor and a second driving transistor; The base of the first driving transistor is connected to the output pin of MCU1, and the collector is connected to the driving end of the first solid-state relay; The base of the second driving transistor is connected to the output pin of MCU2, and the collector is connected to the driving end of the second solid-state relay; When the first driving transistor and the second driving transistor are turned on at the same time, the first solid-state relay and the second solid-state relay are turned on synchronously.

[0012] According to the novel AC signal controller provided by the present invention, MCU1 and MCU2 are configured as follows: Determine the signal status based on the preset current threshold range, including: When the working current ≥ threshold A, it is judged to be normally lit; When the working current is less than or equal to the threshold value B, it is judged to be in the off state or filament failure; When threshold B < working current < threshold A, it is determined to be leakage abnormality; The threshold value A and the threshold value B are preset, and the threshold value B is less than the threshold value A.

[0013] According to the novel AC signal controller provided by the present invention, when the verification results of MCU1 and MCU2 are inconsistent, a fault alarm signal is sent to the interlocking device and the series output control module is forcibly shut down.

[0014] According to the novel AC signal controller provided by the present invention, the interlocking communication interface adopts a safety communication protocol and meets the EN 50159 or SIL 4 safety standards.

[0015] The present invention further provides an AC signal control method, which is applied to any of the above-mentioned novel AC signal controllers, and the method comprises: The first microcontroller unit MCU1 and the second microcontroller unit MCU2 are used to redundantly collect the working current signal of the signal machine and the on / off status of the safety relay; The first microcontroller unit MCU1 and the second microcontroller unit MCU2 independently verify the working current signal and the on / off state of the safety relay. If the verification results of the working current signal and the on / off state of the safety relay are consistent, the status information of the signal machine is uploaded to the interlocking device. The first microcontroller unit MCU1 and the second microcontroller unit MCU2 analyze the control command issued by the interlocking device and synchronously generate a drive signal; When the driving signals generated by the first micro control unit MCU1 and the second micro control unit MCU2 are both valid, the first solid-state relay and the second solid-state relay connected in series are turned on to control the signal machine.

[0016] The novel AC signal controller and signal control method provided by the present invention include a first microcontroller unit MCU1, a second microcontroller unit MCU2, a current acquisition module, a relay node state acquisition module, a series output control module and an interlocking communication interface; the current acquisition module is connected in series in the signal control loop, and is used to collect the working current data of the signal in real time, and synchronously transmit the working current data to the MCU1 and the MCU2; the relay node state acquisition module is connected to the feedback node of the safety relay, and is used to obtain the opening and closing state information of the safety relay, and synchronously transmit the opening and closing state information of the safety relay to the MCU1 and the MCU2; the MCU1 and the MCU2 are used to independently perform the received working current data and the opening and closing state information of the safety relay on the MCU1 and the MCU2 respectively. Verification, when the verification results of the working current data and the opening and closing status information of the safety relay obtained by the MCU1 and the MCU2 are consistent, the working status of the signal is uploaded to the interlocking device through the interlocking communication interface; according to the control command issued by the interlocking device, a drive signal is generated and output to the series output control module; the series output control module includes an execution circuit composed of a first solid-state relay and a second solid-state relay in series, wherein the drive end of the first solid-state relay is connected to the output pin of the MCU1, and the drive end of the second solid-state relay is connected to the output pin of the MCU2; the series output end of the first solid-state relay and the second solid-state relay is connected to the signal load; when MCU1 and MCU2 simultaneously output the conduction drive signal, the first solid-state relay and the second solid-state relay are synchronously turned on, and the signal is powered on. The present invention can correctly judge the working status of the signal and upload it reliably, accurately control the signal according to its own judgment or the command issued by the interlocking device, and verify the control effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a structural diagram of the novel AC signal controller provided by the present invention.

[0019] Figure 2 It is a structural diagram of the signal control system provided by the present invention.

[0020] Figure 3 This is one of the structural diagrams of the current acquisition module provided by the present invention.

[0021] Figure 4 This is the second structural diagram of the current acquisition module provided by the present invention.

[0022] Figure 5 This is one of the structural diagrams of the relay node status acquisition module provided by the present invention.

[0023] Figure 6 This is the second structural diagram of the relay node status acquisition module provided by the present invention.

[0024] Figure 7 It is a structural diagram of the series output control module provided by the present invention.

[0025] Figure 8 It is a flow chart of the signal control method provided by the present invention. DETAILED DESCRIPTION

[0026] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0027] The following combination Figures 1-8 The novel AC signal controller and signal control method of the present invention are described.

[0028] In some specific embodiments of the present invention, Figure 1 、 2 As shown, this solution provides a new AC signal controller, which includes a current acquisition module 11, a relay node status acquisition module 12, an MCU1 first microcontroller unit 13, an MCU2 second microcontroller unit 14, an interlocking communication interface 15 and a series output control module 16; The current acquisition module 11 is connected in series to the signal control circuit, and is used to collect the working current data of the signal in real time, and synchronously transmit the working current data to the MCU1 and the MCU2; The relay node status acquisition module 12 is connected to the feedback node of the safety relay, and is used to obtain the opening and closing status information of the safety relay, and synchronously transmit the opening and closing status information of the safety relay to the MCU1 and the MCU2; The MCU1 and the MCU2 are used to independently verify the received working current data and the opening and closing state information of the safety relay, respectively. When the verification results of the working current data and the opening and closing state information of the safety relay obtained by the MCU1 and the MCU2 are consistent, the signal working state is uploaded to the interlocking device through the interlocking communication interface 15; according to the control command issued by the interlocking device, a driving signal is generated and output to the series output control module 16; The series output control module 16 includes an execution circuit consisting of a first solid-state relay SSR1 and a second solid-state relay SSR2 connected in series, wherein the driving end of the first solid-state relay SSR1 is connected to the output pin of the MCU1, and the driving end of the second solid-state relay SSR2 is connected to the output pin of the MCU2; the series output end of the first solid-state relay SSR2 and the second solid-state relay SSR2 is connected to the signal load; When MCU1 and MCU2 output the on-drive signal at the same time, the first solid-state relay SSR1 and the second solid-state relay SSR2 are turned on synchronously, and the signal machine is powered on and works.

[0029] It's important to note that existing AC signal controllers use solid-state relays and small safety relays to control signal lights. However, solid-state relays can suffer from leakage current, which can cause the small safety relays to operate beyond their limits. Furthermore, existing signal controllers cannot determine whether the relays are fully disconnected, resulting in signal lights remaining permanently on or erroneously on. They also lack real-time monitoring of the signal's operating status, resulting in a lack of closed-loop control.

[0030] Therefore, the present invention collects the signal's operating current and the on / off status of the safety relay in real time, and through a dual MCU design, accurately determines the signal's operating status and uploads this status to the interlocking device. Based on interlocking device commands or autonomous judgment results, the signal's on / off status is precisely controlled, ensuring control reliability through a redundant design. In some possible implementations of the present invention, the current acquisition module includes a sampling resistor and an isolation amplifier. The sampling resistor is connected in series to the signal control circuit. The isolation amplifier collects the differential voltage across the sampling resistor and converts it into a current digital signal, which is output to MCU1 and MCU2.

[0031] Specifically, this embodiment provides an implementation method of a current acquisition module, which acquires the current value of the signal control loop, and the MCU determines the working state of the signal through the current thresholds under different states.

[0032] In a possible embodiment, Figure 3As shown, the sampling resistor R11 is connected in series in the control loop, and the voltage across the sampling resistor R11 is obtained through the isolation amplifier 111. The voltage value is then converted into a current value flowing through the signal machine based on the voltage value. The current value of the signal machine is judged and compared by MCU1 and MCU2 respectively to determine the current working status of the signal machine. When the current working status obtained by the two MCUs is consistent, the current status information is uploaded to the interlocking device.

[0033] In some possible implementations of the present invention, the isolation amplifier uses an AMC3302 chip.

[0034] In a possible embodiment, the acquisition of the signal machine working state includes two parts: the current acquisition part and the safety relay node state. The current acquisition part is as follows: Figure 4 As shown, the isolation amplifier uses the AMC3302 chip. Specifically, the current acquisition part is connected in series to the control circuit. The AMC3302 chip collects the voltage across the sampling resistor R11, converts it into the current passing through the sampling resistor, and transmits the current value to the acquisition pin of the MCU. The MCU determines the collected current value based on the current value under different operating conditions of the signal and determines the current operating status of the signal.

[0035] In some possible embodiments of the present invention, Figure 5 As shown, the relay node status acquisition module 12 includes: A voltage divider circuit 121 connected to a normally closed node of a safety relay; Two optocoupler isolation circuits 122 and 123 connected in series, wherein the input end of the first optocoupler isolation circuit 122 is connected to the output end of the voltage divider circuit 121, and the input end of the second optocoupler isolation circuit 123 is connected in series to the output end of the first optocoupler isolation circuit 122; the output ends of the two optocoupler isolation circuits are respectively connected to the GPIO pins of MCU1 and MCU2; MCU1 and MCU2 are configured to send the same PWM wave to two optocoupler isolation circuits respectively, and determine the relay node status by comparing the phase offset of the two output PWMs.

[0036] Specifically, this embodiment provides an implementation of a status detection module, by setting an optocoupler isolator in the relay node status acquisition module, the output end of each optocoupler isolator is connected to a pin of the MCU respectively, and the two optocouplers are connected in series.

[0037] In a possible embodiment, the optocoupler isolators all use the optocoupler HMHA2801, the optocoupler HMHA2801 detects the normally closed node state of the relay, and the MCU compares the two optocoupler outputs through the PWM waveform to determine whether the relay is completely open / closed.

[0038] Specifically, if Figure 6 As shown, Figure 6 The safety relay node status acquisition part is shown, where the relay status is connected to the 24V voltage through the relay normally closed node, and the status information of the safety relay is determined by two optocouplers HMHA2801 connected in series. One side of the optocoupler is connected to the relay status and the other side is connected to the MCU. The MCU pin generates a PWM wave and uses a different pin to collect the PWM waveform. By comparing the two waveforms, the node status of the relay can be obtained.

[0039] In some possible embodiments of the present invention, Figure 7 As shown, the series output control module further includes a first driving transistor Q3 and a second driving transistor Q4; The base of the first driving transistor Q3 is connected to the output pin of MCU1, and the collector is connected to the driving end of the first solid-state relay SSR1; The base of the second driving transistor Q4 is connected to the output pin of MCU2, and the collector is connected to the driving end of the second solid-state relay SSR2; When the first driving transistor Q3 and the second driving transistor Q4 are turned on at the same time, the first solid-state relay SSR1 and the second solid-state relay SSR2 are turned on synchronously.

[0040] In some possible implementations of the present invention, each of the solid-state relays is controlled to be turned on and off by a transistor, and the turning on and off of the two transistors are controlled by MCU1 and MCU2 respectively. Specifically, this embodiment provides an implementation method of an output control module. The two transistors are switches that control two solid-state relays connected in series. The two MCUs control the two transistors respectively according to the commands issued by the interlocking device. Only when the two transistors are turned on at the same time can the solid-state relay output, thereby controlling the signal machine. Through the dual redundant control design, reliable execution of the signal machine control instructions is achieved.

[0041] In the novel AC signal controller provided by the present invention, two MCUs simultaneously collect and compare current and safety relay node status data. Only when the results match is the signal status uploaded to the interlocking device. The signal is controlled based on commands issued by the interlocking device. The output control circuit consists of two solid-state relays connected in series. Output occurs only when both solid-state relays are turned on simultaneously. Each solid-state relay is controlled by a transistor, and two MCUs control the other MCUs. Only when the outputs of the two MCUs match does the controller issue a corresponding output.

[0042] In some possible implementations of the present invention, MCU1 and MCU2 are configured as follows: Determine the signal status based on the preset current threshold range, including: When the working current ≥ threshold A, it is judged to be normally lit; When the working current is less than or equal to the threshold value B, it is judged to be in the off state or filament failure; When threshold B < working current < threshold A, it is determined to be leakage abnormality; The threshold value A and the threshold value B are preset, and the threshold value B is less than the threshold value A.

[0043] Specifically, an embodiment of the present invention provides an implementation method for determining the state of a traffic light, and determines the state of the traffic light based on a comparison result between an operating current and a preset current threshold range.

[0044] In some possible implementations of the present invention, when the verification results of MCU1 and MCU2 are inconsistent, a fault alarm signal may be sent to the interlocking device via MCU1 and MCU2, and the series output control module may be forcibly shut down.

[0045] In some possible implementations of the present invention, the interlock communication interface adopts a safety communication protocol that meets EN50159 or SIL 4 safety standards.

[0046] In some specific embodiments of the present invention, Figure 8 As shown, this solution provides an AC signal control method, which is implemented by any of the novel AC signal controllers described above, and the method includes: Step 810: redundantly collect the working current signal of the signal machine and the on / off status of the safety relay through the first micro control unit MCU1 and the second micro control unit MCU2; Step 820: The first microcontroller unit MCU1 and the second microcontroller unit MCU2 independently verify the operating current signal and the on / off state of the safety relay. If the verification results of the operating current signal and the on / off state of the safety relay are consistent, the status information of the signal is uploaded to the interlocking device. Step 830: The first microcontroller unit MCU1 and the second microcontroller unit MCU2 analyze the control command issued by the interlocking device and synchronously generate a driving signal; Step 840 : When the driving signals generated by the first micro control unit MCU1 and the second micro control unit MCU2 are both valid, turn on the first solid-state relay and the second solid-state relay connected in series to control the signal machine.

[0047] Specifically, an embodiment of the present invention provides an implementation method for an AC traffic light control method, which accurately collects the status of the traffic light, uploads it to the interlocking device in real time, accurately controls the switching of the traffic light according to the interlocking instruction or autonomous judgment result, and improves the system safety and fault tolerance through the redundancy mechanism.

[0048] In some possible implementations of the present invention, determining the current state of the signal based on the current value specifically includes: Obtaining standard current values ​​of the signal machine under different current states; The current value is compared with the standard current value, and the current state of the signal is determined according to the comparison result.

[0049] Specifically, an embodiment of the present invention provides an implementation method for determining the current state of the signal based on the current value.

[0050] In some possible implementations of the present invention, the detecting the node status of the relay in the signal machine specifically includes: Connecting an MCU to a node of the relay, generating a PWM wave through one pin of the MCU and collecting the PWM waveform through two other pins of the MCU during the detection process; The two collected PWM waveforms are compared and the node status of the relay is determined based on the comparison results.

[0051] Specifically, an embodiment of the present invention provides an implementation method for detecting the node status of the relay in the signal machine.

[0052] The AC signal control method provided by the embodiment of the present invention can correctly collect the status information of each controlled signal light and upload the collection results to the interlocking device; each signal light can be accurately controlled according to the control command issued by the interlocking device.

[0053] The novel AC signal controller and signal control method provided by the present invention are described in detail below through specific embodiments.

[0054] See also Figure 4 During the test, if MCU1 cannot collect the current signal, and an oscilloscope is used to find that there is a signal on the right side of R33 but no signal on the right side of R35, it means that the chip AMC3302 is working normally, but the chip LTC1966 is working abnormally.

[0055] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0056] Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented using software plus a necessary general-purpose hardware platform, or of course, hardware. Based on this understanding, the essence of the above technical solution, or the portion that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, or an optical disk, and includes a number of instructions for causing a computer device (such as a personal computer, server, or network device) to execute the methods described in each embodiment or certain portions of the embodiments.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention 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 make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A new type of AC signal controller, characterized in that: It includes a current acquisition module, a relay node status acquisition module, a first microcontroller unit MCU1, a second microcontroller unit MCU2, a series output control module and an interlocking communication interface; The current acquisition module is connected in series in the signal control circuit, and is used to collect the working current data of the signal in real time, and synchronously transmit the working current data to the MCU1 and the MCU2; The relay node status acquisition module is connected to the feedback node of the safety relay, and is used to obtain the opening and closing status information of the safety relay, and synchronously transmit the opening and closing status information of the safety relay to the MCU1 and the MCU2; The MCU1 and the MCU2 are used to independently verify the received working current data and the opening and closing state information of the safety relay, respectively. When the verification results of the working current data and the opening and closing state information of the safety relay obtained by the MCU1 and the MCU2 are consistent, the signal machine working state is uploaded to the interlocking device through the interlocking communication interface; according to the control command issued by the interlocking device, a driving signal is generated and output to the series output control module; The series output control module includes an execution circuit consisting of a first solid-state relay and a second solid-state relay connected in series, wherein the driving end of the first solid-state relay is connected to the output pin of MCU1, and the driving end of the second solid-state relay is connected to the output pin of MCU2; the series output end of the first solid-state relay and the second solid-state relay is connected to the signal load; When MCU1 and MCU2 output the on-drive signal at the same time, the first solid-state relay and the second solid-state relay are turned on synchronously, and the signal machine is powered on and operates.

2. The novel AC signal controller according to claim 1 is characterized in that: The current acquisition module includes a sampling resistor and an isolation amplifier. The sampling resistor is connected in series to the signal control loop. The isolation amplifier collects the differential voltage across the sampling resistor and converts it into a current digital signal and outputs it to MCU1 and MCU2.

3. The novel AC signal controller according to claim 2 is characterized in that: The isolation amplifier adopts the AMC3302 chip.

4. The novel AC signal controller according to claim 1 is characterized in that: The relay node status acquisition module includes: A voltage divider circuit connected to a normally closed node of a safety relay; Two optocoupler isolation circuits connected in series, wherein the input end of the first optocoupler isolation circuit is connected to the output end of the voltage divider circuit, and the input end of the second optocoupler isolation circuit is connected in series to the output end of the first optocoupler isolation circuit; the output ends of the two optocoupler isolation circuits are respectively connected to the GPIO pins of MCU1 and MCU2; MCU1 and MCU2 are configured to send the same PWM wave to two optocoupler isolation circuits respectively, and determine the relay node status by comparing the phase offset of the two output PWMs.

5. The novel AC signal controller according to claim 4 is characterized in that: The two optical coupler isolation circuits both use the optical coupler HMHA2801.

6. The novel AC signal controller according to claim 1 is characterized in that: The series output control module further includes a first driving transistor and a second driving transistor; The base of the first driving transistor is connected to the output pin of MCU1, and the collector is connected to the driving end of the first solid-state relay; The base of the second driving transistor is connected to the output pin of MCU2, and the collector is connected to the driving end of the second solid-state relay; When the first driving transistor and the second driving transistor are turned on at the same time, the first solid-state relay and the second solid-state relay are turned on synchronously.

7. The novel AC signal controller according to any one of claims 1 to 6, characterized in that: MCU1 and MCU2 are configured as: Determine the signal status based on the preset current threshold range, including: When the working current ≥ threshold A, it is judged to be normally lit; When the working current is less than or equal to the threshold value B, it is judged to be in the off state or filament failure; When threshold B < working current < threshold A, it is determined to be leakage abnormality; The threshold value A and the threshold value B are preset, and the threshold value B is less than the threshold value A.

8. The novel AC signal controller according to claim 1 is characterized in that: When the verification results of MCU1 and MCU2 are inconsistent, a fault alarm signal is sent to the interlocking device and the series output control module is forcibly shut down.

9. The novel AC signal controller according to claim 1, characterized in that: The interlock communication interface adopts a safety communication protocol and meets the EN 50159 or SIL 4 safety standards.

10. A method for controlling an AC signal, characterized in that: The method is implemented by the novel AC signal controller according to any one of claims 1 to 9, and includes: The first microcontroller unit MCU1 and the second microcontroller unit MCU2 are used to redundantly collect the working current signal of the signal machine and the on / off status of the safety relay; The first microcontroller unit MCU1 and the second microcontroller unit MCU2 independently verify the working current signal and the on / off state of the safety relay. If the verification results of the working current signal and the on / off state of the safety relay are consistent, the status information of the signal machine is uploaded to the interlocking device. The first microcontroller unit MCU1 and the second microcontroller unit MCU2 analyze the control command issued by the interlocking device and synchronously generate a drive signal; When the driving signals generated by the first micro control unit MCU1 and the second micro control unit MCU2 are both valid, the first solid-state relay and the second solid-state relay connected in series are turned on to control the signal machine.

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