Train sliding plug door driving circuit based on acoustic recognition and sliding plug door

Abstract

The invention discloses a train sliding plug door driving circuit based on acoustic recognition and a sliding plug door in the technical field of rail transit. The driving circuit comprises an angle sensor, a first comparator A1, a double-channel sound acquisition circuit and a sound signal processing circuit. The input end of the angle sensor collects a real angle signal in the rotating process when the triangular head rotating shaft is unlocked, and the output end of the angle sensor is connected with the data processing module; and the inverted input end of the first comparator is connected with the output end of the data processing module. According to the invention, the OR gate logic circuit is arranged, so that the first voiceprint signal and / or the second voiceprint signal can be timely processed, and two voiceprint signals with high definition can be further obtained through linear superposition and dynamic capture of the voiceprint signals; and further comparing to obtain a difference value between the amplitudes of the two voiceprint signals and a preset amplitude value, so that whether the working states of the rodless cylinder and the isolation lock are normal or not can be quickly judged based on the difference value.

Description

Technical Field

[0001] This invention relates to the field of rail transit technology, specifically to a train sliding door drive circuit and a sliding door based on acoustic recognition. Background Technology

[0002] Train sliding doors are automatic door systems widely used in railway passenger cars, high-speed trains, and urban rail transit vehicles. The sliding door combines "plugging" and "pulling" actions during opening and closing. When closing, the door panels are "plugged" from outside or inside the car into the doorway on the side wall, making the door surface flush with the car's exterior. When opening, the door panels first move a short distance and then "pull" open along the outside or inside of the car body, forming a passage. This combined movement is achieved through a drive mechanism, slide rails, and mechanical linkages located at the top of the door, ensuring precise opening and closing and sealing. Train sliding doors can be divided into manual sliding doors and electrically controlled sliding doors according to their activation method. Manual sliding doors are opened and closed by manual force, while electrically controlled sliding doors are opened and closed by a rodless cylinder controlled by a drive circuit.

[0003] Existing electronically controlled sliding doors drive the door panels by receiving a single start signal. This single driving method makes it difficult to effectively identify the working status of the sliding door and to detect faults in the sliding door's operating structure in a timely manner, which is not conducive to reducing safety risks during the use of the sliding door. Summary of the Invention

[0004] The purpose of this invention is to provide a train sliding door drive circuit and a sliding door based on acoustic recognition. By comparing the motion data of key structures and mechanical acoustic signatures during the sliding door's operation in real time, it can achieve rapid [operation].

[0005] To achieve the above objectives, the present invention provides the following technical solution: A train sliding door drive circuit and sliding door based on acoustic recognition are disclosed. The train sliding door includes an inner operating device, an outer operating device, and a rodless cylinder. The outer operating device includes a drive circuit and a triangular head rotating shaft. The drive circuit includes an angle sensor, a first comparator A1, a dual-channel sound acquisition circuit, and a sound signal processing circuit. The input terminal of the angle sensor acquires the actual angle signal during the rotation of the triangular head rotating shaft when it unlocks, and the output terminal of the angle sensor is connected to a data processing module. The inverting input terminal of the first comparator is connected to the output terminal of the data processing module, and the non-inverting input terminal of the first comparator is connected to the first terminal of a PI controller. The PI controller sends a reference signal to the first comparator through the first terminal, and the output terminal of the first comparator is connected to the second terminal of the PI controller. The first comparator is used to compare the error value between the reference angle signal and the actual angle signal. The angle sensor acquires the actual angle when the triangular head rotating shaft rotates and sends the actual angle to the first comparator in the form of an electrical signal. By comparing it with the reference signal, the error can be determined based on the actual angle. The difference in results determines whether the triangular head shaft has rotated to the expected angle, thereby timely understanding the working status of the triangular head shaft, which helps to reduce the safety risks of the sliding door. The first comparator outputs the comparison result signal through its output terminal. The dual-channel sound acquisition circuit includes a first sound sensor, a second sound sensor, a servo motor, and an isolation lock. The first sound sensor is used to acquire the sound signal of the isolation lock, and the second sound sensor is used to acquire the sound signal of the rodless cylinder. The input terminals of the servo motor and the isolation lock are respectively connected to the third and fourth terminals of the PI controller. The output terminal of the servo motor is connected to the rodless cylinder. The output terminals of both the first and second sound sensors are connected to the preamplifier. The input terminal of the sound signal processing circuit is connected to the output terminal of the preamplifier. The sound signal processing circuit obtains the corresponding two-channel voiceprint signals based on the amplified sound signal. The output terminal of the sound signal processing circuit is connected to the inverting input terminal of the second comparator A2. The second comparator A2 is used to compare the amplitude of the two-channel voiceprint signals. The output terminal of the second comparator A2 is connected to the central controller. The sound signal collected by the first sound sensor is used as the first sound signal, which is the first channel sound signal. The sound signal collected by the second sound sensor is used as the second sound signal, which is the second channel sound signal. Both sound signals are filtered by a bandpass filter to reduce noise, resulting in the first and second voiceprint signals. The output of the central controller is connected to a buzzer, an alarm, a communication module, and a solenoid valve. When the amplitude of the voiceprint signal reaches a preset value, the central controller drives the buzzer and solenoid valve to enter the working state, thereby controlling the rodless cylinder and the isolation lock. The system collects and processes the sound of actions generated after entering the working state. It can send two soundprint signals, amplified by a preamplifier and filtered by a bandpass filter, to a frame-by-frame sampling and quantization unit for sampling and quantization. By setting an OR gate logic circuit, it can ensure that the first soundprint signal and / or the second soundprint signal are processed in a timely manner. Furthermore, by linearly superimposing and dynamically capturing the soundprint signals, it can obtain two soundprint signals with high clarity. By further comparing the amplitude of the two soundprint signals with the preset amplitude difference, it can quickly determine whether the working state of the rodless cylinder and the isolation lock is normal based on the difference.

[0006] As a further aspect of the present invention: one end of the isolation lock is electrically connected to an LED indicator.

[0007] As a further aspect of the present invention: the data processing module includes an A / D converter, the input terminal of which is connected to the output terminal of the angle sensor, the output terminal of which is connected to the input terminal of a rectifier filter, and the output terminal of the rectifier filter is connected to the inverting input terminal of the first comparator A1. The A / D converter is used to convert the received analog angle signal into a digital angle signal and send it to the rectifier filter. The rectifier filter is used to receive and rectify and filter the digital angle signal.

[0008] As a further aspect of the present invention: the non-inverting input terminal of the first comparator A1 includes an input terminal and a passive element.

[0009] As a further aspect of the present invention: the passive component includes a first resistor R1 and a second resistor R2. The first end of the first resistor R1 is connected to the non-inverting input of the first comparator A1 and the first end of the second resistor R2. The second end of the first resistor R1 is connected to the first end of the PI controller. The second end of the second resistor R2 is grounded. The first resistor R1 and the second resistor R2 serve as voltage divider resistors for the non-inverting input of the first comparator A1, respectively.

[0010] As a further aspect of the present invention: the passive component includes a first capacitor C1, the first end of the first capacitor C1 is connected to the non-inverting input terminal of the first comparator A1 and the first end of the second resistor R2, and the second end of the first capacitor C1 is connected to the first terminal of the PI controller.

[0011] As a further aspect of the present invention: the preamplifier includes a transformer T1, the input terminal of the transformer T1 is connected to the output terminals of the first sound sensor and the second sound sensor, the output terminal of the transformer T1 is connected to the input terminal of the amplifier circuit, and the output terminal of the amplifier circuit is connected to the input terminal of the bandpass filter.

[0012] As a further aspect of the present invention: the amplification circuit includes an amplifier A3 and peripheral circuitry. The peripheral circuitry includes a third resistor R3, a fifth resistor R5, a sixth resistor R6, and a seventh resistor R7. The inverting input terminal of amplifier A3 is connected to the first terminal of the seventh resistor R7, the second terminal of the seventh resistor R7 is connected to the first terminal of the third resistor R3, the second terminal of the third resistor R3 is connected to the output terminal of amplifier A3, the output terminal of amplifier A3 is connected to the input terminal of the bandpass filter, the non-inverting input terminal of amplifier A3 is connected to the first terminal of the fifth resistor R5, the second terminal of the fifth resistor R5 is connected to the first terminal of the sixth resistor R6, and the second terminal of the sixth resistor R6 is grounded. Both the fifth resistor R5 and the seventh resistor R7 are adjustable resistors. The transformer T1 includes a primary winding and a secondary winding N3. The primary winding includes a first winding N1 and a second winding N2 connected in parallel. The first winding N1 is connected to the output terminal of the first sound sensor, and the second winding N2 is connected to the output terminal of the second sound sensor.

[0013] As a further aspect of the present invention: the peripheral circuit includes a third resistor R3 and a sixth resistor R6. The first end of the third resistor R3 is connected to the inverting input terminal of the amplifier A3, and the first end of the sixth resistor R6 is connected to the non-inverting input terminal of the amplifier A3. The transformer T1 includes a primary winding N1 and a secondary winding N3. The primary winding N1 is connected to the output terminals of the first sound sensor and the second sound sensor.

[0014] As a further aspect of the present invention: the non-inverting input terminal of the second comparator A2 is connected to the first terminal of the fourth resistor R4, and the second terminal of the fourth resistor R4 is grounded. By setting the fourth resistor R4, the bias current at the non-inverting input terminal of the second comparator A2 can be absorbed, thereby making the potential at the non-inverting input terminal of the second comparator A2 more stable and reducing the error caused by the bias current.

[0015] As a further aspect of the present invention: the input terminal of the central controller is connected to an anti-pinch signal, a 98% signal, a position switch, a 5km / h signal, an external operation signal, and an internal operation signal.

[0016] As a further aspect of the present invention: the audio signal processing circuit includes a bandpass filter, the input of which is connected to the output of a preamplifier, the output of which outputs a first voiceprint signal and a second voiceprint signal to the input of a frame-by-frame sampling quantization unit, the output of which is connected to the input of an OR gate, the output of which is connected to the input of a linear superposition unit, the output of which is connected to the input of an order difference module MFCC, and the output of which is connected to the inverting input of a second amplifier A2.

[0017] Secondly, a sliding door is also provided, which includes a door leaf, a top structure, a side structure and a bottom structure, wherein the side structure is equipped with an acoustic recognition-based train sliding door drive circuit as described in the above solution.

[0018] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention uses an angle sensor to collect the actual angle of the triangular head shaft when it rotates, and sends the actual angle to the first comparator in the form of an electrical signal. By comparing it with the reference signal, it can determine whether the triangular head shaft has rotated to the expected angle based on the error result, so as to understand the working status of the triangular head shaft in a timely manner, which helps to reduce the safety risks of the sliding door.

[0019] 2. This invention collects and processes the sound of the rodless cylinder and the isolation lock after they enter the working state. It can send two soundprint signals, amplified by a preamplifier and filtered by a bandpass filter, to a frame-by-frame sampling and quantization unit for sampling and quantization. By setting an OR gate logic circuit, it can ensure that the first soundprint signal and / or the second soundprint signal are processed in a timely manner. Furthermore, by linearly superimposing and dynamically capturing the soundprint signals, it can obtain two soundprint signals with high clarity. By further comparing the amplitude of the two soundprint signals with the preset amplitude difference, it can quickly determine whether the working state of the rodless cylinder and the isolation lock is normal based on the difference. Attached Figure Description

[0020] Figure 1 This is a circuit structure diagram of the first embodiment of the present invention; Figure 2 This is a circuit structure diagram of the second embodiment of the present invention; Figure 3 This is a circuit diagram of a preamplifier according to the first embodiment of the present invention; Figure 4 This is a circuit diagram of a preamplifier according to a second embodiment of the present invention. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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. Example

[0022] Please see Figure 1 and Figure 3 This embodiment provides a train sliding door drive circuit and a sliding door based on acoustic recognition. The train sliding door includes an inner operating device, an outer operating device, and a rodless cylinder. The outer operating device includes a drive circuit and a triangular head rotating shaft. The drive circuit includes an angle sensor, a first comparator A1, a dual-channel sound acquisition circuit, and a sound signal processing circuit. The input terminal of the angle sensor acquires the real angle signal during the rotation process of the triangular head rotating shaft when unlocking. The output terminal of the angle sensor is connected to a data processing module. The inverting input terminal of the first comparator is connected to the output terminal of the data processing module, and the non-inverting input terminal of the first comparator is connected to the first terminal of a PI controller. The PI controller sends a reference signal to the first comparator through the first terminal. The output terminal of the first comparator is connected to the second terminal of the PI controller. The first comparator is used to compare the error value between the reference angle signal and the real angle signal. The angle sensor acquires the real angle when the triangular head rotating shaft rotates and sends the real angle to the first comparator in the form of an electrical signal. By comparing it with the reference signal, the error can be determined based on the actual angle. The difference result determines whether the triangular head shaft has rotated to the expected angle, thus timely understanding the working status of the triangular head shaft, which helps to reduce the safety risks of the sliding door. The first comparator outputs the comparison result signal through the output terminal; the dual-channel sound acquisition circuit includes a first sound sensor, a second sound sensor, a servo motor, and an isolation lock. The first sound sensor is used to acquire the sound signal of the isolation lock, and the second sound sensor is used to acquire the sound signal of the rodless cylinder. The input terminals of the servo motor and the isolation lock are respectively connected to the third and fourth terminals of the PI controller. The output terminal of the servo motor is connected to the rodless cylinder. The output terminals of the first and second sound sensors are both connected to the preamplifier; the input terminal of the sound signal processing circuit is connected to the output terminal of the preamplifier. The sound signal processing circuit obtains the corresponding two-channel voiceprint signals based on the amplified sound signal. The output terminal of the sound signal processing circuit is connected to the inverting input terminal of the second comparator A2. The second comparator A2 is used to compare the amplitude of the two-channel voiceprint signals. The output terminal of the second comparator A2 is connected to the central controller.

[0023] The sound signal collected by the first sound sensor is used as the first sound signal, which is the first channel sound signal. The sound signal collected by the second sound sensor is used as the second sound signal, which is the second channel sound signal. Both sound signals are filtered by a bandpass filter to reduce noise, resulting in the first and second voiceprint signals. The output of the central controller is connected to a buzzer, an alarm, a communication module, and a solenoid valve. When the amplitude of the voiceprint signal reaches a preset value, the central controller drives the buzzer and solenoid valve to enter the working state, thereby controlling the rodless cylinder and the isolation lock. The system collects and processes the sound of actions generated after entering the working state. It can send two soundprint signals, amplified by a preamplifier and filtered by a bandpass filter, to a frame-by-frame sampling and quantization unit for sampling and quantization. By setting an OR gate logic circuit, it can ensure that the first soundprint signal and / or the second soundprint signal are processed in a timely manner. Furthermore, by linearly superimposing and dynamically capturing the soundprint signals, it can obtain two soundprint signals with high clarity. By further comparing the amplitude of the two soundprint signals with the preset amplitude difference, it can quickly determine whether the working state of the rodless cylinder and the isolation lock is normal based on the difference.

[0024] The audio signal processing circuit includes a bandpass filter. The input of the bandpass filter is connected to the output of the preamplifier. The output of the bandpass filter outputs the first and second voiceprint signals to the input of the frame-by-frame sampling quantization unit. The output of the frame-by-frame sampling quantization unit is connected to the input of an OR gate. The output of the OR gate is connected to the input of a linear superposition unit. The output of the linear superposition unit is connected to the input of a step difference module MFCC. The output of the step difference module MFCC is connected to the inverting input of the second amplifier A2.

[0025] Preferably, one end of the isolation lock is electrically connected to an LED indicator.

[0026] Preferably, the data processing module includes an A / D converter, the input of which is connected to the output of the angle sensor, the output of which is connected to the input of a rectifier filter, and the output of which is connected to the inverting input of a first comparator A1. The A / D converter is used to convert the received analog angle signal into a digital angle signal and send it to the rectifier filter. The rectifier filter is used to receive and rectify and filter the digital angle signal.

[0027] Preferably, the non-inverting input of the first comparator A1 includes an input terminal and a passive element.

[0028] Preferably, the passive components include a first resistor R1 and a second resistor R2. The first end of the first resistor R1 is connected to the non-inverting input of the first comparator A1 and the first end of the second resistor R2. The second end of the first resistor R1 is connected to the first end of the PI controller, and the second end of the second resistor R2 is grounded. The first resistor R1 and the second resistor R2 serve as voltage divider resistors for the non-inverting input of the first comparator A1, respectively.

[0029] Preferably, the preamplifier includes a transformer T1, the input terminal of which is connected to the output terminals of the first sound sensor and the second sound sensor, the output terminal of which is connected to the input terminal of the amplifier circuit, and the output terminal of the amplifier circuit is connected to the input terminal of the bandpass filter.

[0030] like Figure 3 As shown, preferably, the amplification circuit includes amplifier A3 and peripheral circuitry. The peripheral circuitry includes a third resistor R3, a fifth resistor R5, a sixth resistor R6, and a seventh resistor R7. The inverting input terminal of amplifier A3 is connected to the first terminal of the seventh resistor R7, the second terminal of the seventh resistor R7 is connected to the first terminal of the third resistor R3, the second terminal of the third resistor R3 is connected to the output terminal of amplifier A3, the output terminal of amplifier A3 is connected to the input terminal of a bandpass filter, the non-inverting input terminal of amplifier A3 is connected to the first terminal of the fifth resistor R5, the second terminal of the fifth resistor R5 is connected to the first terminal of the sixth resistor R6, and the second terminal of the sixth resistor R6 is grounded. Both the fifth resistor R5 and the seventh resistor R7 are adjustable resistors. Transformer T1 includes a primary winding and a secondary winding N3. The primary winding includes a first winding N1 and a second winding N2 connected in parallel. The first winding N1 is connected to the output terminal of the first sound sensor, and the second winding N2 is connected to the output terminal of the second sound sensor.

[0031] Preferably, the non-inverting input terminal of the second comparator A2 is connected to the first terminal of the fourth resistor R4, and the second terminal of the fourth resistor R4 is grounded. By setting the fourth resistor R4, the bias current at the non-inverting input terminal of the second comparator A2 can be absorbed, thereby making the potential at the non-inverting input terminal of the second comparator A2 more stable and reducing the error caused by the bias current.

[0032] Preferably, the input terminals of the central controller are connected to an anti-pinch signal, a 98% signal, a position switch, a 5km / h signal, an external operation signal, and an internal operation signal. Example

[0033] Please see Figure 2 and Figure 4This embodiment provides a train sliding door drive circuit and a sliding door based on acoustic recognition. The train sliding door includes an inner operating device, an outer operating device, and a rodless cylinder. The outer operating device includes a drive circuit and a triangular head rotating shaft. The drive circuit includes an angle sensor, a first comparator A1, a dual-channel sound acquisition circuit, and a sound signal processing circuit. The input terminal of the angle sensor acquires the actual angle signal during the rotation process of the triangular head rotating shaft when unlocking. The output terminal of the angle sensor is connected to a data processing module. The inverting input terminal of the first comparator is connected to the output terminal of the data processing module, and the non-inverting input terminal of the first comparator is connected to the first terminal of a PI controller. The PI controller sends a reference signal to the first comparator through the first terminal. The output terminal of the first comparator is connected to the second terminal of the PI controller. The first comparator is used to compare the error value between the reference angle signal and the actual angle signal. The angle sensor acquires the actual angle when the triangular head rotating shaft rotates and sends the actual angle to the first comparator in the form of an electrical signal. By comparing it with the reference signal, it is possible to determine whether the triangular head rotating shaft has rotated to the expected angle based on the error result, thereby timely understanding the working status of the triangular head rotating shaft, which helps to reduce the safety risks of the sliding door. The first comparator outputs the comparison result signal through its output terminal.The dual-channel sound acquisition circuit includes a first sound sensor, a second sound sensor, a servo motor, and an isolation lock. The first sound sensor acquires the sound signal from the isolation lock, and the second sound sensor acquires the sound signal from the rodless cylinder. The input terminals of the servo motor and the isolation lock are connected to the third and fourth terminals of a PI controller, respectively. The output terminal of the servo motor is connected to the rodless cylinder. The output terminals of both the first and second sound sensors are connected to a preamplifier. The input terminal of the sound signal processing circuit is connected to the output terminal of the preamplifier. The sound signal processing circuit obtains the corresponding two-channel voiceprint signals based on the amplified sound signals. The circuit's output is connected to the inverting input of the second comparator A2, which compares the amplitudes of the two voiceprint signals. The output of the second comparator A2 is connected to the central controller. The sound signal collected by the first sound sensor is used as the first sound signal (the first channel sound signal), and the sound signal collected by the second sound sensor is used as the second sound signal (the second channel sound signal). Both sound signals are filtered by a bandpass filter to reduce noise, resulting in the first and second voiceprint signals. The output of the central controller is connected to a buzzer, alarm, communication module, and electromagnetic... When the amplitude of the voiceprint signal reaches a preset value, the central controller drives the buzzer and solenoid valve to enter the working state. By collecting and processing the action sounds generated after the rodless cylinder and isolation lock enter the working state, the two voiceprint signals, amplified by a preamplifier and filtered by a bandpass filter, are sent to the frame-by-frame sampling and quantization unit for sampling and quantization. By setting an OR gate logic circuit, the first and / or second voiceprint signals can be processed in a timely manner. Furthermore, through linear superposition and dynamic capture of the voiceprint signals, two high-clarity voiceprint signals can be obtained. Further comparison of the two voiceprint signals yields... The difference between the amplitude and the preset amplitude allows for rapid determination of whether the rodless cylinder and isolation interlock are functioning correctly. The audio signal processing circuit includes a bandpass filter. The input of the bandpass filter is connected to the output of the preamplifier. The output of the bandpass filter outputs the first and second voiceprint signals to the input of the frame-by-frame sampling quantization unit. The output of the frame-by-frame sampling quantization unit is connected to the input of an OR gate. The output of the OR gate is connected to the input of a linear superposition unit. The output of the linear superposition unit is connected to the input of the MFCC (Multi-Level Differential) module. The output of the MFCC module is connected to the inverting input of the second amplifier A2.

[0034] Preferably, one end of the isolation lock is electrically connected to an LED indicator.

[0035] Preferably, the data processing module includes an A / D converter, the input of which is connected to the output of the angle sensor, the output of which is connected to the input of a rectifier filter, and the output of which is connected to the inverting input of a first comparator A1. The A / D converter is used to convert the received analog angle signal into a digital angle signal and send it to the rectifier filter. The rectifier filter is used to receive and rectify and filter the digital angle signal.

[0036] Preferably, the non-inverting input of the first comparator A1 includes an input terminal and a passive element.

[0037] Preferably, the passive component includes a first capacitor C1, the first end of which is connected to the non-inverting input of the first comparator A1 and the first end of the second resistor R2, and the second end of the first capacitor C1 is connected to the first end of the PI controller.

[0038] Preferably, the preamplifier includes a transformer T1, the input terminal of which is connected to the output terminals of the first sound sensor and the second sound sensor, the output terminal of which is connected to the input terminal of the amplifier circuit, and the output terminal of the amplifier circuit is connected to the input terminal of the bandpass filter.

[0039] like Figure 4 As shown, preferably, the peripheral circuit includes a third resistor R3 and a sixth resistor R6. The first end of the third resistor R3 is connected to the inverting input terminal of the amplifier A3, and the first end of the sixth resistor R6 is connected to the non-inverting input terminal of the amplifier A3. The transformer T1 includes a primary winding N1 and a secondary winding N3. The primary winding N1 is connected to the output terminals of the first sound sensor and the second sound sensor.

[0040] Preferably, the non-inverting input terminal of the second comparator A2 is connected to the first terminal of the fourth resistor R4, and the second terminal of the fourth resistor R4 is grounded. By setting the fourth resistor R4, the bias current at the non-inverting input terminal of the second comparator A2 can be absorbed, thereby making the potential at the non-inverting input terminal of the second comparator A2 more stable and reducing the error caused by the bias current.

[0041] Preferably, the input terminals of the central controller are connected to an anti-pinch signal, a 98% signal, a position switch, a 5km / h signal, an external operation signal, and an internal operation signal.

[0042] Secondly, a sliding door is also provided, which includes a door leaf, a top structure, a side structure and a bottom structure, wherein the side structure is equipped with an acoustic recognition-based train sliding door drive circuit as described above.

[0043] The working principle of this invention is as follows: When the train starts running, the operator activates the internal operating device, sends an external operating signal to the central controller, and simultaneously rotates the triangular head shaft. As the triangular head shaft rotates, the angle sensor collects the angle signal of the shaft's rotation, obtains the true angle signal, and sends it to the inverting input of the first comparator A1. The first terminal of the PI controller inputs a reference signal to the non-inverting input of the first comparator A1. The comparator compares the true angle signal with the reference signal. When the comparison result matches a preset value, the output of the first comparator A1 sends a comparison result signal to the PI controller. The PI controller sends a start signal to the servo motor, and the output of the servo motor drives the rodless cylinder to move. At this time, the dual-channel sound acquisition of the rodless cylinder collects the sound signal of its movement. Simultaneously, the PI controller sends a start signal to the isolation interlocking mechanism, initiating the interlocking. The first sound sensor collects the sound signal during interlocking and sends it to the preamplifier. The amplifier amplifies the received sound signal and sends it to the bandpass filter. The bandpass filter filters the received sound signal to obtain the first and second voiceprint signals. The first and second voiceprint signals are sent to the frame-by-frame sampling quantization unit for sampling. They are then passed through an OR gate to the linear superposition unit for superposition calculation. Finally, the received voiceprint signals are dynamically captured by the differential module MFCC and sent to the second comparator A2. The second comparator A2 further compares the amplitude of the two voiceprint signals with the preset amplitude difference. Based on the difference, it can quickly determine whether the working status of the rodless cylinder and the isolation lock is normal. When the working status of the rodless cylinder and the isolation lock is determined to be normal, the central controller controls the buzzer to sound and the solenoid valve to close the plug door. If the result obtained by the comparator does not meet the preset value, the central controller will issue an alarm through the alarm and send alarm information to the host computer through the communication module.

[0044] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A train sliding door drive circuit based on acoustic recognition, characterized in that, The train sliding door includes an inner operating device, an outer operating device, and a rodless cylinder. The outer operating device includes a drive circuit and a triangular head shaft. The drive circuit includes: An angle sensor, the input end of which collects the real angle signal during the rotation process of the triangular head shaft when it is unlocked, and the output end of the angle sensor is connected to the data processing module; A first comparator has its inverting input connected to the output of a data processing module, and its non-inverting input connected to the first terminal of a PI controller. The PI controller sends a reference signal to the first comparator through the first terminal. The output of the first comparator is connected to the second terminal of the PI controller. The first comparator is used to compare the error value between the reference angle signal and the true angle signal, and outputs a comparison result signal through its output terminal. A dual-channel sound acquisition circuit includes a first sound sensor, a second sound sensor, a servo motor, and an isolation lock. The first sound sensor is used to acquire the sound signal of the isolation lock, and the second sound sensor is used to acquire the sound signal of the rodless cylinder. The input terminals of the servo motor and the isolation lock are respectively connected to the third and fourth terminals of the PI controller. The output terminal of the servo motor is connected to the rodless cylinder. The output terminals of the first and second sound sensors are both connected to a preamplifier. The sound signal processing circuit has its input terminal connected to the output terminal of the preamplifier. The sound signal processing circuit obtains two corresponding voiceprint signals based on the amplified sound signal. The output terminal of the sound signal processing circuit is connected to the inverting input terminal of the second comparator. The second comparator A2 is used to compare the amplitude of the two voiceprint signals. The output terminal of the second comparator is connected to the central controller. The output terminal of the central controller is connected to a buzzer, a solenoid valve, an alarm, and a communication module. When the amplitude of the voiceprint signal is a preset value, the central controller drives the buzzer and the solenoid valve to enter the working state.

2. The train sliding door drive circuit based on acoustic recognition according to claim 1, characterized in that: The data processing module includes an A / D converter. The input terminal of the A / D converter is connected to the output terminal of the angle sensor. The output terminal of the A / D converter is connected to the input terminal of a rectifier filter. The output terminal of the rectifier filter is connected to the inverting input terminal of the first comparator. The A / D converter is used to convert the received analog angle signal into a digital angle signal and send it to the rectifier filter. The rectifier filter is used to receive and rectify and filter the digital angle signal.

3. The train sliding door drive circuit based on acoustic recognition according to claim 1, characterized in that: The non-inverting input of the first comparator includes an input terminal and a passive component.

4. The train sliding door drive circuit based on acoustic recognition according to claim 3, characterized in that: The passive components include a first resistor and a second resistor. The first end of the first resistor is connected to the non-inverting input of the first comparator and the first end of the second resistor. The second end of the first resistor is connected to the first end of the PI controller and the second end of the second resistor is grounded. The first resistor and the second resistor serve as voltage divider resistors for the non-inverting input of the first comparator, respectively.

5. The train sliding door drive circuit based on acoustic recognition according to claim 3, characterized in that: The passive component includes a first capacitor, the first end of which is connected to the non-inverting input of the first comparator and the first end of the second resistor, and the second end of which is connected to the first end of the PI controller.

6. The train sliding door drive circuit based on acoustic recognition according to claim 1, characterized in that: The preamplifier includes a transformer. The input terminal of the transformer is connected to the output terminals of the first sound sensor and the second sound sensor. The output terminal of the transformer is connected to the input terminal of the amplifier circuit. The output terminal of the amplifier circuit is connected to the input terminal of the bandpass filter.

7. The train sliding door drive circuit based on acoustic recognition according to claim 6, characterized in that: The amplification circuit includes an amplifier and peripheral circuitry. The peripheral circuitry includes a third resistor, a fifth resistor, a sixth resistor, and a seventh resistor. The inverting input of the amplifier is connected to the first terminal of the seventh resistor, the second terminal of the seventh resistor is connected to the first terminal of the third resistor, the second terminal of the third resistor is connected to the output of the amplifier, and the output of the amplifier is connected to the input of the bandpass filter. The non-inverting input of the amplifier is connected to the first terminal of the fifth resistor, the second terminal of the fifth resistor is connected to the first terminal of the sixth resistor, and the second terminal of the sixth resistor is grounded. Both the fifth and seventh resistors are adjustable resistors. The transformer includes a primary winding and a secondary winding. The primary winding includes a first winding and a second winding connected in parallel. The first winding is connected to the output of the first sound sensor, and the second winding is connected to the output of the second sound sensor.

8. The train sliding door drive circuit based on acoustic recognition according to claim 6, characterized in that: The peripheral circuit includes a third resistor and a sixth resistor. The first end of the third resistor is connected to the inverting input of the amplifier, and the first end of the sixth resistor is connected to the non-inverting input of the amplifier. The transformer includes a primary winding and a secondary winding. The primary winding is connected to the outputs of the first sound sensor and the second sound sensor.

9. The train sliding door drive circuit based on acoustic recognition according to claim 8, characterized in that: The non-inverting input of the second comparator is connected to the first terminal of the fourth resistor, and the second terminal of the fourth resistor is grounded.

10. The train sliding door drive circuit based on acoustic recognition according to claim 9, characterized in that: The audio signal processing circuit includes a bandpass filter. The input of the bandpass filter is connected to the output of a preamplifier. The output of the bandpass filter outputs a first voiceprint signal and a second voiceprint signal to the input of a frame-by-frame sampling quantization unit. The output of the frame-by-frame sampling quantization unit is connected to the input of an OR gate. The output of the OR gate is connected to the input of a linear superposition unit. The output of the linear superposition unit is connected to the input of a step difference module. The output of the step difference module is connected to the inverting input of a second amplifier.

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