An emergency handling interface device for earthquake early warning system

Abstract

The present invention provides an earthquake early warning system emergency handling interface device, which mainly includes: a first microprocessor and a second microprocessor which are mutually set in a master-slave mode, output to the corresponding first special relay group and second special relay group through a bus output interface, the control coils of the first railway special relay and the second railway special relay adopt a rated voltage control mode, and the control coils of the third railway special relay and the fourth railway special relay adopt an instantaneous high voltage control mode. The present invention optimizes and dynamically adjusts the working voltage of the relay control coil, improves the pull-in speed of the railway special relay, effectively reduces the alarm output delay time, and further overcomes the technical problem of poor real-time performance of the existing interface device.

Description

Technical Field

[0001] The present invention relates to the field of rail transit safety technology, and in particular to an emergency handling interface device for an earthquake early warning system. Background Art

[0002] my country is located between the world's two major seismic belts, the Pacific Rim and the Eurasian Seismic Belt. It is a country prone to earthquake disasters. Improving the level of earthquake emergency response and protection technology is an effective means to prevent or reduce the damage caused by earthquake disasters to the rail transportation transportation system.

[0003] In view of the current situation of my country's high-speed railway, the monitoring scheme and early warning soft technology of earthquake signals have been relatively mature, but in terms of the earthquake signal processing unit that directly controls the train operation mode, the interface unit of the monitoring host currently mainly sends control instructions to the disposal information receiving module, which further drives the railway special relay group to operate, and then the relay group output node provides an alarm signal to the integrated automation system. The existing relay group module usually uses a railway safety type stepless relay, such as JWXC-1700, but due to the limitation of the control coil structure, the real-time operation is poor. Summary of the invention

[0004] In view of the above-mentioned technical problem that the existing interface device has poor real-time performance, an emergency response interface device of an earthquake early warning system applied to high-speed railways is provided. By dynamically adjusting the working voltage of the railway-specific relay control coil, the relay closing speed is increased, and the alarm output delay time is effectively reduced.

[0005] The technical means adopted by the present invention are as follows:

[0006] An earthquake early warning system emergency handling interface device mainly includes: a first microprocessor and a second microprocessor which are arranged in a master-slave mode with each other, the first microprocessor and the second microprocessor respectively synchronously receive a signal sent by a monitoring host of the earthquake early warning system through a communication interface and output the signal to a corresponding first special relay group and a second special relay group; the first special relay group includes a first railway special relay and a third railway special relay, the output end of the first microprocessor is connected to the control coils of the first railway special relay and the third railway special relay through a bus output interface; the second special relay group includes a second railway special relay and a fourth railway special relay, the output end of the second microprocessor is connected to the control coils of the first railway special relay and the third railway special relay through a bus output interface The interface connects the control coils of the second railway-specific relay and the fourth railway-specific relay; the normally closed nodes of the first and second railway-specific relays are connected in series with a normally open node combination part, and the normally open node combination part includes a normally open node of a third railway-specific relay and a normally open node of a fourth railway-specific relay connected in parallel; the normally open nodes of the first and second railway-specific relays are connected in parallel with a normally closed node combination part, and the normally closed node combination part includes a normally closed node of a third railway-specific relay and a normally closed node of a fourth railway-specific relay connected in series; wherein, the control coils of the first railway-specific relay and the second railway-specific relay adopt a rated voltage control method, and the control coils of the third railway-specific relay and the fourth railway-specific relay adopt an instantaneous high-voltage control method.

[0007] Furthermore, the bus output interface includes a bus control unit, and an over-temperature detection circuit, an over-voltage detection circuit and an over-current detection circuit respectively connected to the input pins of the bus control unit; when the signals emitted by the above detection circuits are within a normal threshold range, the bus control unit maintains the output control signal, otherwise it automatically cuts off the output control signal.

[0008] Furthermore, the bus output interface also includes a voltage regulating module, the voltage regulating chip input end of the voltage regulating module is connected to the output end of the bus control unit, and the output end of the voltage regulating module is connected to the control coils of the first to fourth railway-specific relays.

[0009] Furthermore, the first microprocessor and the second microprocessor communicate with each other via a backplane bus.

[0010] Furthermore, the device also includes a first storage module connected to the first microprocessor, and a second storage module connected to the second microprocessor.

[0011] Furthermore, the device also includes a first photoelectric isolation module connected to the input and output interfaces of the first microprocessor, and a second photoelectric isolation module connected to the input and output interfaces of the second microprocessor.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] 1. The earthquake early warning system emergency response interface device provided by the present invention optimizes the working voltage of the dynamic adjustment relay control coil, improves the pull-in speed of the railway-specific relay, and reduces the alarm delay time from 200ms specified in the "Q / CR 633-2018 Technical Conditions for High-speed Railway Earthquake Early Warning Monitoring System" issued by the China Railway Corporation to within 150ms, thereby effectively improving the real-time performance of the system.

[0014] 2. The present invention realizes the voltage transformation regulation of IO channel output control by designing a dynamic voltage regulation module, thereby flexibly controlling the action time of the railway-specific relay.

[0015] 3. The present invention ensures that the relay group will not malfunction due to a microprocessor or IO channel failure through redundant structure design and detection and optimization control of IO channel over-temperature, over-voltage, and over-current, thereby effectively improving the stability of processing information reception.

[0016] 4. The device of the present invention can effectively identify communication failures by real-time detection and monitoring of the communication status of the host, thereby preventing the relay group from issuing erroneous action instructions to the integrated automation system due to communication failures.

[0017] 5. The storage unit of the device of the present invention utilizes the dynamic storage area and the static storage area respectively to perform detailed processing on the initialization of the device and the abnormal communication with the monitoring host, thereby improving the stability and reliability of the system.

[0018] Based on the above reasons, the present invention can be widely promoted in the field of rail transit earthquake early warning safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative labor.

[0020] Figure 1 It is a schematic diagram of the system principle of the device of the present invention.

[0021] Figure 2 It is a schematic diagram of the IO channel control output of the device of the present invention.

[0022] Figure 3 It is a schematic diagram of the IO channel control output voltage regulation module of the device of the present invention.

[0023] Figure 4It is a schematic diagram of the normally open and normally closed contact output of the relay of the present invention.

[0024] Figure 5 It is a working flow chart of the device of the present invention. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0027] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0028] like Figure 1 As shown, an emergency handling interface device for an earthquake early warning system mainly includes: a first microprocessor and a second microprocessor which are arranged in a master-standby mode with each other, the first microprocessor and the second microprocessor respectively synchronously receive the signal sent by the earthquake early warning system monitoring host through the communication interface and output the signal to the corresponding first special relay group and the second special relay group; the first special relay group includes a first railway special relay and a third railway special relay, the output end of the first microprocessor is connected to the control coils of the first railway special relay and the third railway special relay through a bus output interface; the second special relay group includes a second railway special relay and a fourth railway special relay, the output end of the second microprocessor is connected to the control coils of the second railway special relay and the fourth railway special relay through a bus output interface. The bus output interface includes an over-temperature detection circuit, an over-voltage detection circuit and an over-current detection circuit; when the control circuit works normally, the output control signal is maintained, otherwise the output control signal is automatically cut off, such as Figure 2 The figure shows the circuit connection diagram of the bus IO channel. As can be seen from the figure, the device uses a temperature detection amplifier, a voltage detection amplifier and a current detection amplifier to respectively extract the actual temperature, voltage and current in real time. Once the threshold value is exceeded, the device output signal is immediately cut off to ensure the stability of the device. The bus output interface also includes a voltage regulation module, such as Figure 3As shown, the input end of the voltage regulating chip of the voltage regulating module is connected to the output end of the bus control unit, and the output end of the voltage regulating module is connected to the control coils of the first to fourth railway-specific relays. Figure 4 As shown, the normally closed node and normally open node combination part of the first / second railway-specific relay are connected in series, and the normally open node combination part includes the normally open node of the third railway-specific relay and the normally open node of the fourth railway-specific relay in parallel; in the standby state, the normally closed node of the first / second railway-specific relay is in a disconnected state, and the normally open nodes of the third railway-specific relay and the fourth railway-specific relay are in a disconnected state. The normally open node and the normally closed node combination part of the first / second railway-specific relay are connected in parallel, and the normally closed node combination part includes the normally closed node of the third railway-specific relay and the normally closed node of the fourth railway-specific relay in series, and in the standby state, the normally open node of the first / second railway-specific relay is in a closed state, and the normally closed node of the third railway-specific relay and the normally closed node of the fourth railway-specific relay are in a closed state. Among them, the control coils of the first railway-specific relay and the second railway-specific relay adopt the rated voltage control method, and the control coils of the third railway-specific relay and the fourth railway-specific relay adopt the instantaneous high voltage control method. Furthermore, the control coils of the first railway-specific relay and the second railway-specific relay adopt a rated voltage DC24V control mode, and the control coils of the third railway-specific relay and the fourth railway-specific relay adopt an instantaneous DC36V high voltage control mode, thereby increasing the coil current and improving the pull-in speed. The voltage regulation principle is as follows: Figure 3 As shown, the present invention uses a control chip to receive a voltage regulation signal, and adjusts it based on the PWM dynamic voltage regulation principle to achieve dynamic voltage regulation of the IO control circuit, thereby controlling the relay pull-in speed. Specifically, the STM32 chip detects the input signal of the PA1 pin, and then outputs pulse control signals of different frequencies through the GATE pin, adjusts the duty cycle, and outputs a variable voltage according to the voltage regulation working principle of the transformer.

[0029] The device also includes a first storage module connected to the first microprocessor and a second storage module connected to the second microprocessor. Specifically, the first and second storage modules each include a static storage area and a dynamic storage area, the static storage area stores system initialization control commands, and the dynamic storage area stores system control commands in real time.

[0030] Furthermore, the device also includes a first photoelectric isolation module connected to the input and output interfaces of the first microprocessor, and a second photoelectric isolation module connected to the input and output interfaces of the second microprocessor, so as to achieve physical isolation between electrical components.

[0031] The technical solution of the present invention is further illustrated below through specific application examples.

[0032] like Figure 1 As shown, a high-reliability earthquake early warning system emergency handling interface device includes two groups of equipment with a first microprocessor and a second microprocessor as the core and four railway-specific relays. The two groups of microprocessor equipment are mutually active and standby, synchronously processing commands sent by the earthquake early warning system monitoring host, and realizing information exchange and logic analysis through the backplane bus. According to the priority principle, the working state of the railway-specific relay is controlled through the IO channel. The earthquake early warning system emergency handling interface device stores the microprocessor processing information in real time through the storage unit, ensures that the I / O channel output remains unchanged when the communication between the device and the monitoring host is abnormal, and avoids the relay group from issuing erroneous action instructions to the integrated automation system.

[0033] The emergency handling interface device specifically includes a communication interface, a photoelectric isolation module, a microprocessor, a bus output interface and a railway-specific relay; the communication interface is responsible for receiving control commands issued by the monitoring host; the photoelectric isolation modules located at the front and rear ends of the first microprocessing unit and the second microprocessing unit realize physical isolation between electrical components and realize self-protection; the bus output interface is responsible for executing the output of control actions through the I / O channel; the first microprocessing unit and the second microprocessing unit analyze the commands sent by the monitoring host and perform logical operations, and finally transmit them to the railway-specific relay group through the bus output interface, and control the railway-specific relay group through the I / O channel, thereby controlling the integrated automation system; the EEPROM storage unit is responsible for real-time storage of information processed by the microprocessing unit. Once the device communicates abnormally with the monitoring host, it is directly output to the I / O channel to control the relay group action according to the storage information of the storage unit; the storage unit includes a static storage area and a dynamic storage area, the static storage area is responsible for storing system initialization control commands, and the dynamic storage area is responsible for real-time storage of system control commands.

[0034] In the earthquake early warning system, the monitoring host does not directly drive and control the railway-specific relay group. It determines the earthquake level and authenticity based on the data sent by the data collector and the earthquake early warning magnitude determination method, and controls the working mode of the relay group through this interface device.

[0035] A highly reliable earthquake early warning system emergency handling interface device, specifically comprising:

[0036] a. The first data collector or the second data collector collects seismic signals and transmits the vibration signals to the corresponding first monitoring host or the second monitoring host;

[0037] b. The first monitoring host or the second monitoring host determines the earthquake level and authenticity based on the earthquake early warning magnitude determination method: if yes, the first monitoring host or the second monitoring host outputs a control command to the corresponding emergency handling interface device; if no, the first monitoring host or the second monitoring host does not output a control command;

[0038] c. After the first microprocessor or the second microprocessor in the emergency handling interface device receives the control command from the corresponding monitoring host, it controls the working mode of the railway-specific relay group through the I / O channel according to the processing result of the microprocessor;

[0039] d. The I / O channels in the emergency handling interface device are designed with over-temperature (OPV), over-voltage (OVP), and over-current (OCP) detection circuits. If the control circuit works normally, the output control signal is maintained. Once an abnormality is detected in the control circuit, the output control signal is automatically cut off to ensure that the railway-specific relay group will not be mistakenly triggered. Figure 2 As shown;

[0040] e. The four railway-specific relays in the emergency handling interface device are connected in series and in parallel to provide opening and closing signals to the integrated automatic system. Figure 4 As shown, the output delay time of the final signal depends on the one with the slowest response speed among the four relays, wherein the first and second relays are in the energized state when not in alarm, and the third and fourth relays are in the dropped state when not in alarm. When the alarm is output, the working state of the four relays is reversed, the first and second relays are dropped, and the third and fourth relays are energized. Considering that the energizing speed of the third and fourth relays is slower than the dropping speed of the first and second relays, the output delay time of the final signal is affected. The rated voltage DC24V control mode is adopted for the control coils of the first and second relays, and the instantaneous DC36V high voltage control mode is adopted for the control coils of the third and fourth relays to increase the coil current. By increasing the energizing speed of the third and fourth relays, the alarm output delay time is effectively shortened; preferably, the emergency disposal interface device has built-in detection functions of communication quality, system power supply and working status with the monitoring host. Once the communication between the device and the monitoring host is abnormal, the device outputs the control command stored in the dynamic storage area at the previous moment to the I / O channel to control the relay group action.

[0041] The following will assume that microprocessor A is the main microprocessor and microprocessor B is the backup microprocessor to explain the specific working process of the device of the present invention, and vice versa. When the system is powered on, because the dynamic memory is empty, the content of the static storage area is directly transferred to the dynamic memory as the initial value of the dynamic storage area; in addition, Figure 5 The "standby command" means that the microprocessor does not execute the control command sent by the monitoring host, and does not output the control command to the I / O channel control relay group.

[0042] The specific workflow is as follows:

[0043] Step 1: Determine whether there is any abnormality in the communication between the device and the monitoring host. If there is an abnormality, directly output the dynamic storage information of the storage unit (the control command output by the microprocessor at the previous moment) to the I / O channel to control the action of the relay group; otherwise, go to step 2.

[0044] Step 2: The main microprocessor monitors the commands sent by the monitoring host in real time through the communication interface.

[0045] Step 3: The main microprocessor exchanges information with the backup microprocessor and determines whether the backup microprocessor has sent a control command according to the earthquake level.

[0046] If the standby microprocessor has sent a control command, the main microprocessor will receive a standby command sent by the standby microprocessor;

[0047] If the standby host microprocessor does not send a control command, go to step 4.

[0048] Step 4: The main microprocessor updates the dynamic storage information of the storage unit in real time according to the earthquake level, and sends control commands to the I / O channel to further control the action of the relay group.

[0049] The above system adopts a redundant design mechanism, which greatly improves the reliability of the device and effectively avoids the relay group sending erroneous action instructions to the integrated automation system when abnormal communication between the device and the monitoring host is caused by misoperation, thereby ensuring the efficient and stable working mode of the earthquake early warning system.

[0050] 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 replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An earthquake early warning system emergency handling interface device, characterized in that: Mainly include: A first microprocessor and a second microprocessor are arranged in a master-standby mode with each other, wherein the first microprocessor and the second microprocessor respectively receive signals sent by a first monitoring host and a second monitoring host of an earthquake early warning system synchronously through a communication interface and output the signals to a corresponding first special relay group and a second special relay group, wherein the first monitoring host collects earthquake signals through a first data collector, and the second monitoring host collects earthquake signals through a second data collector; the first special relay group includes a first railway special relay and a third railway special relay, and the output end of the first microprocessor is connected to the control coils of the first railway special relay and the third railway special relay through a bus output interface; the second special relay group includes a second railway special relay and a fourth railway special relay, and the output end of the second microprocessor is connected to the control coils of the second railway special relay and the fourth railway special relay through a bus output interface; The normally closed nodes of the first and second railway-specific relays are connected in series with a normally open node combination part, and the normally open node combination part includes a normally open node of a third railway-specific relay and a normally open node of a fourth railway-specific relay control coil connected in parallel; the normally open nodes of the first and second railway-specific relays are connected in parallel with a normally closed node combination part, and the normally closed node combination part includes a normally closed node of a third railway-specific relay and a normally closed node of a fourth railway-specific relay connected in series; Among them, the first and second railway-specific relays are in the energized state when there is no alarm, and the third and fourth railway-specific relays are in the down state when there is no alarm. When the alarm is output, the working states of the four relays are reversed, the first and second railway-specific relays are down, and the third and fourth railway-specific relays are energized. The control coils of the first railway-specific relay and the second railway-specific relay adopt a rated voltage control mode, and the control coils of the third railway-specific relay and the fourth railway-specific relay adopt an instantaneous high voltage control mode, and the voltage regulation signal is received by the microprocessor, and is adjusted based on the PWM dynamic voltage regulation principle, and the dynamic voltage regulation of the control circuit is controlled through the bus output interface, thereby controlling the relay pull-in speed; The bus output interface also includes a voltage regulating module, the voltage regulating chip input end of the voltage regulating module is connected to the output end of the bus control unit, and the output end of the voltage regulating module is connected to the control coils of the first to fourth railway-specific relays; In the earthquake early warning system, the monitoring host does not directly drive and control the railway-specific relay group. Instead, it determines the earthquake level and authenticity based on the earthquake early warning magnitude determination method according to the data sent by the data collector, and controls the working mode of the relay group through the earthquake early warning system emergency disposal interface device. When the earthquake early warning system emergency handling interface device is powered on, because the dynamic storage area is empty, the content of the static storage area is directly transferred to the dynamic memory as the initial value of the dynamic storage area; The specific workflow is as follows: Step 1: Determine whether there is an abnormality in the communication between the device and the monitoring host. If an abnormality occurs, directly output the dynamic storage information of the storage unit to the I / O channel to control the action of the relay group. At this time, the dynamic storage information is the control command output by the microprocessor at the previous moment; otherwise, go to step 2; Step 2: The main microprocessor monitors the commands sent by the monitoring host in real time through the communication interface; Step 3: The main microprocessor exchanges information with the standby microprocessor and determines whether the standby microprocessor has sent a control command according to the earthquake level: If the standby microprocessor has sent a control command, the main microprocessor will receive a standby command sent by the standby microprocessor; If the standby host microprocessor does not send a control command, go to step 4; Step 4: The main microprocessor updates the dynamic storage information of the storage unit in real time according to the earthquake level, and sends control commands to the I / O channel to further control the action of the relay group.

2. The earthquake early warning system emergency handling interface device according to claim 1, characterized in that: The bus output interface includes a bus control unit, and an over-temperature detection circuit, an over-voltage detection circuit and an over-current detection circuit respectively connected to the input pins of the bus control unit; when the signals emitted by the above detection circuits are within the normal threshold range, the bus control unit maintains the output control signal, otherwise it automatically cuts off the output control signal.

3. The earthquake early warning system emergency handling interface device according to claim 1, characterized in that: The first microprocessor and the second microprocessor communicate with each other via a backplane bus.

4. An earthquake early warning system emergency handling interface device according to any one of claims 1 to 3, characterized in that: The device also includes a first storage module connected to the first microprocessor, and a second storage module connected to the second microprocessor.

5. An earthquake early warning system emergency handling interface device according to any one of claims 1 to 3, characterized in that: The device also includes a first photoelectric isolation module connected to the input and output interfaces of the first microprocessor, and a second photoelectric isolation module connected to the input and output interfaces of the second microprocessor.

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