Controller circuit for automatic speed limiting of rail locomotive

Abstract

The utility model relates to the technical field of automatic control of rail locomotives, and provides a controller circuit for automatic speed limiting of a rail locomotive, which comprises a singlechip circuit, a clock circuit, a gear sampling circuit, a gear output circuit, an Ethernet communication circuit and an RFID (Radio Frequency Identification) card reading module, the gear sampling circuit is used for providing accurate time marks, the input end of the gear sampling circuit is connected with a driver controller of the rail locomotive, the output end of the gear sampling circuit is connected with the single-chip microcomputer circuit, the gear sampling circuit is used for collecting gear information input by the driver controller, and the gear output circuit is used for outputting gear adjusting information to a control system of the rail locomotive. One end of the Ethernet communication circuit is connected with the single-chip microcomputer circuit, the other end of the Ethernet communication circuit is used for being connected with a sensor, and the RFID card reading module is connected with the single-chip microcomputer circuit and used for reading preset speed limit information in an RFID tag beside a track; the rail locomotive speed limiting device can automatically limit the speed of a rail locomotive on a corresponding road section.

Description

Technical Field

[0001] The utility model relates to the technical field of rail locomotive automation control, in particular to a controller circuit for automatic speed limiting of a rail locomotive. Background Art

[0002] As the main means of transporting materials, supplies, and slag in rail construction operations, rail locomotives are widely used in tunnel civil engineering, mining and other fields. Therefore, the operating environment of rail locomotives is complex. First, there will be areas without network and signal during the operation of the locomotive, and there will be blind spots for monitoring the operating status of the locomotive. Secondly, the driver also has visual blind spots. In addition, the existing locomotives in the industry have a low degree of automation, and there is no prompt when passing through high accident risk points. It is difficult for the driver to accurately control the speed and braking distance, which can easily lead to derailment, slipping, and loss of control of the locomotive. Therefore, it is necessary to automatically limit the speed of the locomotive in the corresponding section to ensure safe operation. Utility Model Content

[0003] The problem solved by the utility model is how to provide a controller circuit which can automatically limit the speed of a rail vehicle in a corresponding section.

[0004] To solve the above problems, the present invention provides a controller circuit for automatic speed limiting of rail locomotives, comprising: a single-chip microcomputer circuit, a clock circuit, a gear sampling circuit, a gear output circuit, an Ethernet communication circuit and an RFID card reader module. The clock circuit is connected to the single-chip microcomputer circuit to provide accurate time stamps. The input end of the gear sampling circuit is connected to the driver controller of the rail locomotive, and the output end is connected to the single-chip microcomputer circuit for collecting gear information input by the driver controller. The input end of the gear output circuit is connected to the single-chip microcomputer circuit, and the output end is connected to the rail locomotive control system for outputting gear adjustment information to the rail locomotive control system. One end of the Ethernet communication circuit is connected to the single-chip microcomputer circuit, and the other end is used to connect to a sensor. The RFID card reader module is connected to the single-chip microcomputer circuit to read the preset speed limit information in the RFID tag beside the track. The RFID tags are pre-distributed and set beside the track at the entrance and exit of each speed limit section.

[0005] Furthermore, the controller circuit also includes a power supply circuit, which includes an incoming line protection circuit, a filtering circuit, a first voltage conversion circuit and a second voltage conversion circuit. The input end of the incoming line protection circuit is connected to the incoming line power supply, and the output end is connected to the input end of the first voltage conversion circuit through the filtering circuit. The input end of the second voltage conversion circuit is connected to the output end of the first voltage conversion circuit.

[0006] Furthermore, the single-chip microcomputer circuit includes a single-chip microcomputer chip, and a first crystal oscillator circuit, a reset circuit and a debugging interface circuit connected to the single-chip microcomputer chip.

[0007] Furthermore, the clock circuit includes a real-time clock chip, a diode conduction switching circuit and a backup battery circuit. The output end of the real-time clock chip is connected to the single-chip computer circuit. The diode conduction switching circuit includes two diodes with connected cathodes. The cathodes of the two diodes are connected to the power supply end of the real-time clock chip, the anode of the first diode is connected to the 3.3V power supply, and the anode of the second diode is connected to the output end of the backup battery circuit.

[0008] Furthermore, the gear sampling circuit includes a sampling interface and a sampling isolation filter circuit. The sampling interface is used to connect to the controller. The input end of the sampling isolation filter circuit is connected to the sampling interface, and the output end is connected to the single-chip microcomputer circuit.

[0009] Furthermore, the gear output circuit includes an 8-way switch signal output circuit and a gear output interface. The controlled end of the switch signal output circuit is connected to the output end of the single-chip microcomputer circuit, and outputs high and low level signals according to the control of the single-chip microcomputer circuit. The input end of the gear output interface is respectively connected to the output end of the 8-way switch signal output circuit and the common port. The output end of the gear output interface is used to connect to the control system of the rail locomotive.

[0010] Furthermore, the Ethernet communication circuit includes an Ethernet interface circuit, a second crystal oscillator circuit and an Ethernet conversion circuit, the first communication end of the Ethernet conversion circuit is connected to the single-chip microcomputer circuit, the second communication end is connected to the Ethernet interface circuit, and the second crystal oscillator circuit is connected to the Ethernet conversion circuit.

[0011] Furthermore, the controller circuit also includes a switch quantity control circuit, a controlled end of the switch quantity control circuit is connected to the single chip microcomputer circuit, and an output end outputs a switch quantity signal through a switch signal interface.

[0012] Furthermore, the controller circuit also includes a data storage circuit, which is connected to the single-chip computer circuit and is used for storing historical information and work logs.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] When the locomotive is traveling on the track, the single-chip microcomputer circuit of this controller is connected to the driver controller through the gear sampling circuit to obtain the gear information of the locomotive in real time. The single-chip microcomputer circuit collects the sensor signal through the Ethernet communication circuit to obtain the real-time running speed of the locomotive. When it is about to pass through a high-risk section that requires low speed, the preset information in the RFID tag beside the track is read through the RFID card reader module. The single-chip microcomputer circuit compares the existing gear speed with the tag information. When the speed gear does not meet the requirements, the gear information will be sent to the control system of the locomotive through the gear output circuit, so that the locomotive switches to a gear that meets the requirements and reduces the speed to pass the high-risk section. Through the above-mentioned structure of pre-setting the RFID tag beside the track and reading the information by the controller, it is not affected by factors such as the network. The speed limit information can be obtained in time on the track, and the gear can be adjusted in time to control the vehicle speed and ensure driving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall principle structure of an embodiment of the present utility model;

[0016] Figure 2 This is a schematic diagram of the principle structure of the single chip microcomputer circuit of the embodiment of the utility model;

[0017] Figure 3 This is a schematic diagram of the principle structure of the power supply circuit of an embodiment of the utility model;

[0018] Figure 4 This is a schematic diagram of the principle structure of the clock circuit of an embodiment of the present utility model;

[0019] Figure 5 This is a schematic diagram of the principle structure of the gear sampling circuit of an embodiment of the present utility model;

[0020] Figure 6 This is a schematic diagram of the principle structure of the RFID card reader module according to an embodiment of the present utility model;

[0021] Figure 7 This is a schematic diagram of the principle structure of the Ethernet communication circuit of the embodiment of the present utility model;

[0022] Figure 8 This is a schematic diagram of the principle structure of the gear output circuit of an embodiment of the present utility model;

[0023] Figure 9 This is a schematic diagram of the principle structure of the switch control circuit of the embodiment of the utility model. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0025] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0026] Throughout this specification, references to the terms "embodiment," "one embodiment," and "one implementation" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or implementation are included in at least one embodiment or implementation of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or implementation. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or implementations.

[0027] like Figure 1 As shown, the utility model provides a controller circuit for automatic speed limit of rail locomotives, including: a single-chip microcomputer circuit, a clock circuit, a gear sampling circuit, a gear output circuit, an Ethernet communication circuit and an RFID card reader module. The clock circuit is connected to the single-chip microcomputer circuit to provide accurate time marking. The input end of the gear sampling circuit is connected to the driver controller of the rail locomotive, and the output end is connected to the single-chip microcomputer circuit for collecting gear information input by the driver controller. The input end of the gear output circuit is connected to the single-chip microcomputer circuit, and the output end is connected to the rail locomotive control system for outputting gear adjustment information to the rail locomotive control system. One end of the Ethernet communication circuit is connected to the single-chip microcomputer circuit, and the other end is used to connect to a sensor. The RFID card reader module is connected to the single-chip microcomputer circuit to read the preset speed limit information in the RFID tag beside the track. The RFID tags are pre-distributed and set beside the track at the entrance and exit of each speed limit section.

[0028] It should be noted that when the locomotive is traveling on the track, the single-chip microcomputer circuit of this controller is connected to the driver controller through the gear sampling circuit to obtain the gear information of the locomotive in real time, and the single-chip microcomputer circuit collects the speed sensor signal through the Ethernet communication circuit to obtain the real-time running speed of the locomotive. When it is about to pass through a high-risk section that requires low speed, the preset information in the RFID tag next to the track is read through the RFID card reader module. The single-chip microcomputer circuit compares the existing gear speed with the tag information. When the speed gear does not meet the requirements, the gear information will be sent to the control system of the locomotive through the gear output circuit, so that the locomotive switches to a gear that meets the requirements and reduces the speed to pass the high-risk section. Through the above-mentioned structure of pre-setting the RFID tag next to the track and reading the information by the controller, it is not affected by factors such as the network, and can obtain speed limit information in time on the track, adjust the gear in time, control the vehicle speed, and ensure driving safety.

[0029] In one embodiment of the present utility model, the controller circuit also includes a power supply circuit, which includes an incoming line protection circuit, a filter circuit, a first voltage conversion circuit and a second voltage conversion circuit. The input end of the incoming line protection circuit is connected to the incoming line power supply, and the output end is connected to the input end of the first voltage conversion circuit through the filter circuit. The input end of the second voltage conversion circuit is connected to the output end of the first voltage conversion circuit.

[0030] It should be noted that if Figure 3 As shown, in the incoming line protection circuit, the fuse FU1 is used for overcurrent protection, and the diode D42 is used to prevent reverse connection; the filter circuit uses the inductor L5 and the capacitors C40-C42 to form a Π-type filter, the first voltage conversion circuit uses the chip U22 to convert the input 24V into 5V power supply, and the second voltage conversion circuit uses the voltage regulator chip U24 to convert the 5V voltage into 3.3V voltage.

[0031] In one embodiment of the present invention, the single-chip microcomputer circuit includes a single-chip microcomputer chip, and a first crystal oscillator circuit, a reset circuit, and a debugging interface circuit connected to the single-chip microcomputer chip.

[0032] It should be noted that if Figure 2 As shown, U1 is a single-chip microcomputer chip, which is used to receive information such as gear position, sensor, and tag reading, and after comparison, send gear information to the control system of the rail locomotive to control the locomotive gear and speed. Crystal oscillator Y1 provides crystal oscillator signal for chip U1, RESET is an external reset signal, which is used to reset the single-chip microcomputer chip, interface K1 is the debugging interface of chip U1, which is used for data debugging, capacitors C1-C13 are used for power supply filtering of chip U1, and chip U1 is also connected with 4 LED indicator lights to indicate its power supply and operating status.

[0033] In one embodiment of the present utility model, the clock circuit includes a real-time clock chip, a diode conduction switching circuit and a backup battery circuit. The output end of the real-time clock chip is connected to the single-chip computer circuit. The diode conduction switching circuit includes two diodes with connected cathodes. The cathodes of the two diodes are connected to the power supply end of the real-time clock chip, the anode of the first diode is connected to the 3.3V power supply, and the anode of the second diode is connected to the output end of the backup battery circuit.

[0034] It should be noted that if Figure 4 As shown, chip U31 is a real-time clock chip that provides accurate time stamps for the single-chip microcomputer circuit. Batl is the backup battery for the clock. Due to the single-phase conduction characteristics of the diode, when the 3.3V voltage provided by the power supply circuit is stable, the battery will not supply power through the diode. When the 3.3V power supply disappears, the battery voltage turns on the lower diode to supply power to the clock, which can ensure continuous and stable power supply to the clock and prevent the clock from causing confusion in time information due to power failure.

[0035] In one embodiment of the present invention, the gear sampling circuit includes a sampling interface and a sampling isolation filter circuit. The sampling interface is used to connect to the controller. The input end of the sampling isolation filter circuit is connected to the sampling interface, and the output end is connected to the single-chip microcomputer circuit.

[0036] It should be noted that if Figure 5 As shown, the sampling interface uses a D-SUB male interface to connect to the controller. The received signal is isolated and filtered by optocouplers U3 and U4, and then transmitted to the microcontroller circuit to ensure signal accuracy.

[0037] In one embodiment of the present utility model, the gear output circuit includes an 8-way switch signal output circuit and a gear output interface. The controlled end of the switch signal output circuit is connected to the output end of the single-chip microcomputer circuit, and outputs high and low level signals according to the control of the single-chip microcomputer circuit. The input end of the gear output interface is respectively connected to the output end of the 8-way switch signal output circuit and the common port. The output end of the gear output interface is used to connect to the control system of the rail locomotive.

[0038] It should be noted that if Figure 7 As shown in the figure, the gear output interface adopts a D-SUB female interface to connect to the control system of the rail locomotive. To ensure the stability of the output level signal, the switch signal output circuit adopts a MOS tube to control the 5V power supply through the optocoupler to transmit stable high and low level digital signals. The MOS tube is controlled by the output port of the single-chip microcomputer circuit, and then forms an 8-bit digital signal controlled by the single-chip microcomputer circuit, which is sent to the control system of the rail locomotive as a gear signal.

[0039] In one embodiment of the present utility model, the Ethernet communication circuit includes an Ethernet interface circuit, a second crystal oscillator circuit and an Ethernet conversion circuit, the first communication end of the Ethernet conversion circuit is connected to the single-chip microcomputer circuit, the second communication end is connected to the Ethernet interface circuit, and the second crystal oscillator circuit is connected to the Ethernet conversion circuit.

[0040] It should be noted that if Figure 8 As shown, interface J1 is the Ethernet interface and U2 is the Ethernet chip. It can be seen that the information received through the Ethernet interface is converted and output to the communication port of the microcontroller circuit. The crystal oscillator Y1 provides the crystal oscillator signal for the chip U2. During operation, the Ethernet communication circuit is responsible for collecting the data from the sensor and transmitting it to the microcontroller circuit. When stopped, the staff can also connect to the microcontroller through the network port to obtain the storage data of the controller.

[0041] In one embodiment of the present invention, the controller circuit further includes a switch control circuit, a controlled end of the switch control circuit is connected to the single chip circuit, and an output end outputs a switch signal through a switch signal interface.

[0042] It should be noted that if Figure 9 As shown in the figure, in the switch control circuit, the single-chip microcomputer circuit controls the on-off of the MOS tube to form a switch control signal on the output side of the optocoupler. The switch control signal can be used to control automatic braking and automatic horn, etc.

[0043] In one embodiment of the present invention, the controller circuit further includes a data storage circuit, which is connected to the single-chip microcomputer circuit and is used for storing historical information and work logs.

[0044] It should be noted that the data storage circuit is used to store the control and operation history and system work log, which is convenient for later call and viewing.

[0045] Although the present disclosure is disclosed as above, the protection scope of the present disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present disclosure, and these changes and modifications will fall within the protection scope of the present utility model.

Claims

1. A controller circuit for automatic speed limiting of a railway locomotive, characterized in that: include: A single-chip microcomputer circuit, a clock circuit, a gear sampling circuit, a gear output circuit, an Ethernet communication circuit and an RFID card reader module. The clock circuit is connected to the single-chip microcomputer circuit to provide accurate time stamps. The input end of the gear sampling circuit is connected to the driver controller of the rail locomotive, and the output end is connected to the single-chip microcomputer circuit for collecting gear information input by the driver controller. The input end of the gear output circuit is connected to the single-chip microcomputer circuit, and the output end is connected to the rail locomotive control system for outputting gear adjustment information to the rail locomotive control system. One end of the Ethernet communication circuit is connected to the single-chip microcomputer circuit, and the other end is used to connect to a sensor. The RFID card reader module is connected to the single-chip microcomputer circuit to read the preset speed limit information in the RFID tag beside the track. The RFID tags are pre-distributed and set beside the track at the entrance and exit of each speed limit section.

2. The controller circuit for automatic speed limiting of a railway locomotive according to claim 1, characterized in that: It also includes a power supply circuit, which includes an incoming line protection circuit, a filter circuit, a first voltage conversion circuit and a second voltage conversion circuit. The input end of the incoming line protection circuit is connected to the incoming line power supply, and the output end is connected to the input end of the first voltage conversion circuit through the filter circuit. The input end of the second voltage conversion circuit is connected to the output end of the first voltage conversion circuit.

3. The controller circuit for automatic speed limiting of a railway locomotive according to claim 1, characterized in that: The single-chip microcomputer circuit includes a single-chip microcomputer chip, and a first crystal oscillator circuit, a reset circuit and a debugging interface circuit connected to the single-chip microcomputer chip.

4. The controller circuit for automatic speed limiting of a railway locomotive according to claim 1, characterized in that: The clock circuit includes a real-time clock chip, a diode conduction switching circuit and a backup battery circuit. The output end of the real-time clock chip is connected to the single-chip computer circuit. The diode conduction switching circuit includes two diodes with connected cathodes. The cathodes of the two diodes are connected to the power supply end of the real-time clock chip, the anode of the first diode is connected to the 3.3V power supply, and the anode of the second diode is connected to the output end of the backup battery circuit.

5. The controller circuit for automatic speed limiting of a railway locomotive according to claim 1, characterized in that: The gear sampling circuit includes a sampling interface and a sampling isolation filter circuit. The sampling interface is used to connect to the controller. The input end of the sampling isolation filter circuit is connected to the sampling interface, and the output end is connected to the single-chip microcomputer circuit.

6. The controller circuit for automatic speed limiting of a railway locomotive according to claim 1, characterized in that: The gear output circuit includes an 8-way switch signal output circuit and a gear output interface. The controlled end of the switch signal output circuit is connected to the output end of the single-chip microcomputer circuit, and outputs high and low level signals according to the control of the single-chip microcomputer circuit. The input end of the gear output interface is respectively connected to the output end of the 8-way switch signal output circuit and a common port. The output end of the gear output interface is used to connect to the control system of the rail locomotive.

7. The controller circuit for automatic speed limiting of a railway locomotive according to claim 1, characterized in that: The Ethernet communication circuit includes an Ethernet interface circuit, a second crystal oscillator circuit and an Ethernet conversion circuit. The first communication end of the Ethernet conversion circuit is connected to the single-chip microcomputer circuit, the second communication end is connected to the Ethernet interface circuit, and the second crystal oscillator circuit is connected to the Ethernet conversion circuit.

8. The controller circuit for automatic speed limiting of a railway locomotive according to claim 1, characterized in that: It also includes a switch quantity control circuit, the controlled end of the switch quantity control circuit is connected to the single chip circuit, and the output end outputs the switch quantity signal through the switch signal interface.

9. The controller circuit for automatic speed limiting of a railway locomotive according to claim 1, characterized in that: It also includes a data storage circuit, which is connected to the single-chip computer circuit and is used for storing historical information and work logs.

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