A novel AC signal machine controller and signal machine control method

Abstract

The application provides a novel AC signal machine controller and signal machine control method, which acquires the working current data of the signal machine in real time through a current acquisition module and synchronously transmits the working current data to MCU1 and MCU2; obtains the opening and closing state information of the safety relay through a relay node state acquisition module and synchronously transmits the opening and closing state information to MCU1 and MCU2; checks the working current data and the opening and closing state information of the safety relay through MCU1 and MCU2 respectively, and uploads the working state of the signal machine to the interlocking device through an interlocking communication interface when the checking results are consistent; generates a driving signal and outputs the driving signal to a series output control module according to the control command issued by the interlocking device; the series output control module comprises an execution circuit composed of a first solid-state relay and a second solid-state relay in series; when MCU1 and MCU2 output the on driving signal at the same time, the first solid-state relay and the second solid-state relay are synchronously turned on, and the signal machine is powered on and works. The application can correctly judge the working state of the signal machine and accurately and reliably control the signal machine according to the command issued by the interlocking device.

Description

Technical Field

[0001] This invention relates to the field of rail transit technology, and in particular to a novel AC signal controller and signal control method. Background Technology

[0002] Currently, the signal controllers used in subways employ a combination of solid-state relays and miniature safety relays to control the signal lights. Although solid-state relays are contactless switches, they are devices that cannot be completely shut off. Even when in the off state, there will still be a slight leakage current. Since current signal controllers are all high-voltage and high-current devices, the combination of solid-state relays and miniature safety relays still exceeds the limit parameters of the miniature safety relays from a current perspective.

[0003] To address this issue, the signal controller control unit is connected in series with the current acquisition unit, and the acquired current results are uploaded to the MCU. The MCU then uses the acquired current results to determine the current operating status of the signal controller and takes appropriate actions.

[0004] However, the aforementioned technologies do not consider whether the relays in the signal controller are completely disconnected or the inability to obtain the real-time operating status of the signal, thus leading to incorrect on / off of the signal lights. Therefore, how to correctly determine the operating status of the signal and correctly shut down the signal when it needs to be shut down are technical problems that signal controllers urgently need to solve. Summary of the Invention

[0005] This invention provides a novel AC signal controller and signal control method to solve the defects in the prior art that fail to effectively determine whether the relay is completely disconnected, cannot obtain the signal's working status in real time, and easily lead to the signal lights turning on and off incorrectly, thereby achieving accurate judgment and control of the signal status.

[0006] This invention provides a novel AC signal controller, comprising 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 to acquire the signal's operating current data in real time and transmit the operating current data synchronously to MCU1 and MCU2. The relay node status acquisition module is connected to the feedback node of the safety relay, and is used to acquire the open and closed status information of the safety relay, and synchronously transmit the open and closed status information of the safety relay to the MCU1 and the MCU2. The MCU1 and MCU2 are used to independently verify the received operating current data and the opening / closing status information of the safety relay, respectively. If the verification results of the operating current data and the opening / closing status information of the safety relay obtained by the MCU1 and MCU2 are consistent, the signal machine operating status 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 connected in series. 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 ends of the first and second solid-state relays are connected to the signal load. When MCU1 and MCU2 simultaneously output the drive signal, the first solid-state relay and the second solid-state relay are synchronously turned on, and the signal machine is powered on and works.

[0007] According to the novel 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 in the signal control circuit, and the isolation amplifier acquires the differential voltage across the sampling resistor and converts it into a digital current signal, which is then output 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 the normally closed node of the safety relay; Two optocoupler isolation circuits are connected in series. The input terminal of the first optocoupler isolation circuit is connected to the output terminal of the voltage divider circuit, and the input terminal of the second optocoupler isolation circuit is connected in series to the output terminal of the first optocoupler isolation circuit. The output terminals 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 aforementioned optocoupler isolation circuits adopt optocoupler 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 terminal 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 terminal of the second solid-state relay; When the first driving transistor and the second driving transistor are both turned on, 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: The signal status is determined based on a preset current threshold range, including: When the operating current is greater than or equal to the threshold A, it is determined to be a normal light-up. When the operating current is less than or equal to the threshold B, it is determined to be in the off state or a filament fault. When threshold B < operating current < threshold A, it is determined to be a leakage current abnormality; Wherein, threshold A and threshold B are preset, and threshold B < threshold 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 equipment, and the serial 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 safe communication protocol and meets the EN 50159 or SIL 4 level safety standards.

[0015] The present invention also provides an AC signal controller control method, applied to the implementation of any of the novel AC signal controllers described above, the method comprising: The operating current signal of the signal machine and the opening and closing status of the safety relay are redundantly acquired by the first microcontroller unit MCU1 and the second microcontroller unit MCU2. The operating current signal and the opening / closing status of the safety relay are independently verified by the first microcontroller unit MCU1 and the second microcontroller unit MCU2. If the verification results of the operating current signal and the opening / closing status 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 parse the control commands issued by the interlocking device and generate drive signals synchronously. When the drive signals generated by the first microcontroller unit MCU1 and the second microcontroller 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 present invention provides a novel AC signal controller and signal control method, comprising a first microcontroller unit MCU1, a second microcontroller unit MCU2, a current acquisition module, a relay node status 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 to acquire the signal's operating current data in real time and synchronously transmit the operating current data to MCU1 and MCU2; the relay node status acquisition module is connected to the feedback node of a safety relay to acquire the opening and closing status information of the safety relay and synchronously transmit the opening and closing status information of the safety relay to MCU1 and MCU2; MCU1 and MCU2 are used to independently process the received operating current data and the opening and closing status information of the safety relay, respectively. Verification is performed. If the verification results of the operating current data obtained by MCU1 and MCU2 and the on / off status information of the safety relay are consistent, the signal's operating status is uploaded to the interlocking device through the interlocking communication interface. Based on 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 connected in series. The drive terminal of the first solid-state relay is connected to the output pin of MCU1, and the drive terminal of the second solid-state relay is connected to the output pin of MCU2. The series output terminals of the first and second solid-state relays are connected to the signal load. When MCU1 and MCU2 simultaneously output a conduction drive signal, the first and second solid-state relays conduct synchronously, and the signal is powered on and operates. This invention can accurately determine the signal's operating status and reliably upload it, accurately control the signal based on its own judgment or commands issued by the interlocking device, and verify the control effect. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the novel AC signal controller provided by the present invention.

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

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

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

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

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

[0024] Figure 7 This is a schematic diagram of the structure of the series output control module provided by the present invention.

[0025] Figure 8 This is a flowchart illustrating the signal controller control method provided by the present invention. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0027] The following is combined with Figures 1-8 This invention describes a novel AC signal controller and signal control method.

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

[0029] It should be noted that existing AC signal controllers use solid-state relays and miniature safety relays to control traffic lights. However, solid-state relays have leakage current issues, which may cause miniature safety relays to operate beyond their limits. Furthermore, existing signal controllers cannot determine whether the relays are completely disconnected, leading to traffic lights remaining constantly on or erroneously illuminated. They also cannot monitor the signal's operating status in real time, lacking closed-loop control.

[0030] Therefore, this invention, through real-time acquisition of the signal's operating current and the on / off status of the safety relay, and using a dual MCU design, accurately determines the signal's operating status and uploads it to the interlocking equipment. Based on commands from the interlocking equipment or the results of its own judgment, it precisely controls the signal's switching, ensuring control reliability through redundancy design. In some possible embodiments of this invention, the current acquisition module includes a sampling resistor and an isolation amplifier. The sampling resistor is connected in series in the signal control circuit, and the isolation amplifier acquires the differential voltage across the sampling resistor and converts it into a digital current signal, which is then output to MCU1 and MCU2.

[0031] Specifically, this embodiment provides an implementation of a current acquisition module. By acquiring the current value of the signal control circuit, the MCU determines the working state of the signal through the current threshold under different states.

[0032] In possible embodiments, such as Figure 3As shown, the sampling resistor R11 is connected in series in the control loop. The voltage across the sampling resistor R11 is obtained through the isolation amplifier 111. Then, the voltage value is converted into the current value flowing through the signal. The current value of the signal is judged and compared by MCU1 and MCU2 respectively to determine the current operating status of the signal. If the current operating status obtained by the two MCUs is consistent, the current status information is uploaded to the interlocking equipment.

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

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

[0035] In some possible embodiments of the present invention, such as Figure 5 As shown, the relay node status acquisition module 12 includes: Voltage divider circuit 121 connected to the normally closed node of the safety relay; Two optocoupler isolation circuits 122 and 123 are connected in series. The input terminal of the first optocoupler isolation circuit 122 is connected to the output terminal of the voltage divider circuit 121, and the input terminal of the second optocoupler isolation circuit 123 is connected in series to the output terminal of the first optocoupler isolation circuit 122. The output terminals 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 method for a status detection module. By setting an optocoupler in the status acquisition module of the relay node, the output terminal of each optocoupler is connected to a pin of the MCU, and two optocouplers are connected in series.

[0037] In possible embodiments, the optocoupler isolator uses the optocoupler HMHA2801. The optocoupler HMHA2801 detects the state of the normally closed node of the relay. The MCU compares the outputs of the two optocouplers through the PWM waveform to determine whether the relay is completely open / closed.

[0038] Specifically, such as Figure 6 As shown, Figure 6 The diagram shows the safety relay node status acquisition section, where the relay status is connected to a 24V voltage through the normally closed relay node, and the safety relay status information is determined by two series-connected optocouplers HMHA2801. 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 acquires the PWM waveform using different pins. By comparing the two waveforms, the node status of the relay can be obtained.

[0039] In some possible embodiments of the present invention, such as Figure 7 As shown, the series output control module also 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 terminal 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 terminal of the second solid-state relay SSR2; When the first driving transistor Q3 and the second driving transistor Q4 are both turned on, the first solid-state relay SSR1 and the second solid-state relay SSR2 are turned on synchronously.

[0040] In some possible embodiments 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 of an output control module. Two transistors control two series-connected solid-state relays. Two MCUs control the two transistors respectively according to the commands issued by the interlocking equipment. Only when both transistors are turned on at the same time can the solid-state relays output, thereby controlling the signal machine. Through the dual-redundant control design, reliable execution of the signal machine control commands is achieved.

[0041] The novel AC signal controller provided in this invention uses two MCUs to simultaneously acquire and compare the current acquisition and safety relay node status acquisition data. Only when the results match will the signal status be uploaded to the interlocking equipment. Control of the signal is achieved based on commands issued by the interlocking equipment. The control output circuit consists of two solid-state relays connected in series. Output only occurs when both solid-state relays are simultaneously conducting. Each solid-state relay is controlled by a transistor, and the two MCUs control two other MCUs. The controller only outputs the corresponding data when the outputs of the two MCUs match.

[0042] In some possible embodiments of the present invention, MCU1 and MCU2 are configured as follows: The signal status is determined based on a preset current threshold range, including: When the operating current is greater than or equal to the threshold A, it is determined to be a normal light-up. When the operating current is less than or equal to the threshold B, it is determined to be in the off state or a filament fault. When threshold B < operating current < threshold A, it is determined to be a leakage current abnormality; Wherein, threshold A and threshold B are preset, and threshold B < threshold A.

[0043] Specifically, this embodiment of the invention provides an implementation method for determining the status of a signal controller, which determines the status of the signal controller based on a comparison between the operating current and a preset current threshold range.

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

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

[0046] In some specific embodiments of the present invention, such as Figure 8 As shown, this solution provides an AC signal controller control method, implemented using any of the novel AC signal controllers described above. The method includes: Step 810: The operating current signal of the signal machine and the opening and closing status of the safety relay are redundantly acquired through the first microcontroller unit MCU1 and the second microcontroller unit MCU2; Step 820: Independently verify the working current signal and the opening / closing status of the safety relay through the first microcontroller unit MCU1 and the second microcontroller unit MCU2. If the verification results of the working current signal and the opening / closing status of the safety relay are consistent, upload the status information of the signal to the interlocking device. Step 830: The control commands issued by the interlocking device are parsed by the first microcontroller unit MCU1 and the second microcontroller unit MCU2, and drive signals are generated synchronously. Step 840: When the drive signals generated by the first microcontroller unit MCU1 and the second microcontroller 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.

[0047] Specifically, this invention provides an implementation method for controlling AC signal lights. By accurately collecting the status of signal lights and uploading it to the interlocking equipment in real time, the system accurately controls the switching of signal lights based on interlocking commands or autonomous judgment results. The system enhances its safety and fault tolerance through a redundancy mechanism.

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

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

[0050] In some possible embodiments of the present invention, detecting the node state of the relay in the signal machine specifically includes: Connect the MCU to the node of the relay. During the detection process, a PWM wave is generated through one pin of the MCU, and the PWM waveform is acquired through two other pins of the MCU. The two acquired PWM waveforms are compared, and the node status of the relay is determined based on the comparison results.

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

[0052] The AC signal control method provided in this embodiment of the invention can correctly collect the status information of each signal light being controlled and upload the collection results to the interlocking equipment; it can accurately control each signal light according to the control commands issued by the interlocking equipment.

[0053] The novel AC signal controller and signal control method provided by the present invention will be specifically described below through specific embodiments.

[0054] See also Figure 4 During the test, if MCU1 fails to acquire a current signal and an oscilloscope shows a signal on the right side of R33 but no signal on the right side of R35, it indicates that chip AMC3302 is working normally, but chip LTC1966 is malfunctioning.

[0055] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0056] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part 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, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts 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, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A novel 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 to acquire the signal's operating current data in real time and transmit the operating current data synchronously to MCU1 and MCU2. The relay node status acquisition module is connected to the feedback node of the safety relay, and is used to acquire the open and closed status information of the safety relay, and synchronously transmit the open and closed status information of the safety relay to the MCU1 and the MCU2. The MCU1 and MCU2 are used to independently verify the received operating current data and the opening / closing status information of the safety relay, respectively. If the verification results of the operating current data and the opening / closing status information of the safety relay obtained by the MCU1 and MCU2 are consistent, the signal machine operating status 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 connected in series. 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 ends of the first and second solid-state relays are connected to the signal load. When MCU1 and MCU2 simultaneously output the drive signal, the first solid-state relay and the second solid-state relay are synchronously turned on, and the signal machine is powered on and works.

2. The novel AC signal controller according to claim 1, characterized in that, The current acquisition module includes a sampling resistor and an isolation amplifier. The sampling resistor is connected in series in the signal control circuit. The isolation amplifier acquires the differential voltage across the sampling resistor and converts it into a digital current signal, which is then output to MCU1 and MCU2.

3. The novel AC signal controller according to claim 2, characterized in that, The isolation amplifier uses the AMC3302 chip.

4. The novel AC signal controller according to claim 1, characterized in that, The relay node status acquisition module includes: A voltage divider circuit connected to the normally closed node of the safety relay; Two optocoupler isolation circuits are connected in series. The input terminal of the first optocoupler isolation circuit is connected to the output terminal of the voltage divider circuit, and the input terminal of the second optocoupler isolation circuit is connected in series to the output terminal of the first optocoupler isolation circuit. The output terminals 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, characterized in that, Both of the aforementioned optocoupler isolation circuits use optocoupler HMHA2801.

6. The novel AC signal controller according to claim 1, characterized in that, The series output control module also 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 terminal 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 terminal of the second solid-state relay; When the first driving transistor and the second driving transistor are both turned on, 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 1-6, characterized in that, MCU1 and MCU2 are configured as follows: The signal status is determined based on a preset current threshold range, including: When the operating current is greater than or equal to the threshold A, it is determined to be a normal light-up. When the operating current is less than or equal to the threshold B, it is determined to be in the off state or a filament fault. When threshold B < operating current < threshold A, it is determined to be a leakage current abnormality; Wherein, threshold A and threshold B are preset, and threshold B < threshold A.

8. The novel AC signal controller according to claim 1, 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 serial output control module is forcibly shut down.

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

10. A method for controlling an AC signal controller, characterized in that, Implemented by the novel AC signal controller according to any one of claims 1-9, the method includes: The operating current signal of the signal machine and the opening and closing status of the safety relay are redundantly acquired by the first microcontroller unit MCU1 and the second microcontroller unit MCU2. The operating current signal and the opening / closing status of the safety relay are independently verified by the first microcontroller unit MCU1 and the second microcontroller unit MCU2. If the verification results of the operating current signal and the opening / closing status 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 parse the control commands issued by the interlocking device and generate drive signals synchronously. When the drive signals generated by the first microcontroller unit MCU1 and the second microcontroller 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.

Images