Sensor applied to train monitoring system
By adding a wireless communication module to the sensor, the problem of complex cable wiring caused by the long distance between railway equipment and train monitoring system was solved, and the cable length was shortened and the construction cost was reduced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN CHANGLONG RAILWAY ELECTRONICS ENGCO
- Filing Date
- 2025-04-22
- Publication Date
- 2026-04-21
AI Technical Summary
The long distance between railway equipment and train monitoring systems necessitates the laying of long cables, increasing the complexity of cable routing and construction costs.
By adding a wireless communication module to the sensor, data can be transmitted to the monitoring equipment, reducing cable length and utilizing the long-distance transmission characteristics of the wireless communication module to avoid wiring.
It effectively shortens cable length, reduces the complexity of cable wiring, and lowers construction difficulty and cost.
Smart Images
Figure CN224145954U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of railway technology, and in particular to a sensor used in train monitoring systems. Background Technology
[0002] In railway applications, sensors play a crucial role as relay points in train monitoring systems, connecting railway equipment with the monitoring system, and their applications are widespread. Their core function is to collect analog signals emitted by railway equipment in real time, convert them into digital signals, and then upload them to the monitoring system.
[0003] In existing technical solutions, railway equipment generates analog signals, which are transmitted to sensors via cables. After processing the signals, the sensors upload the data to the train monitoring system using wired communication methods such as RS485 and CAN, so that the system can perform in-depth analysis, storage, and visualization.
[0004] However, railway equipment and train monitoring systems are often located far apart, and wired communication methods such as RS485 and CAN have inherent limitations in transmission distance. This necessitates laying long cables between railway equipment and smart sensors, significantly increasing the complexity of cable routing and raising construction difficulty and costs. Utility Model Content
[0005] This application provides a sensor for use in a train monitoring system. When the distance between railway equipment and train monitoring equipment is relatively far, using this sensor can effectively shorten the length of the cable, thereby reducing the complexity of cable wiring.
[0006] This application provides a sensor for use in a train monitoring system. The sensor includes a first receiving port, a second receiving port, a signal conversion module, a wired communication module, a wireless communication module, a wireless transmitting port, and a wired transmitting port. The first receiving port receives wired signals transmitted by railway equipment via cable. The second receiving port receives wireless signals transmitted by other sensors. The wireless transmitting port transmits the wireless signals processed by the wireless communication module to other sensors. The wired transmitting port transmits the wired signals processed by the wired communication module to the train monitoring equipment.
[0007] The first receiving port is located on the signal conversion module;
[0008] The signal conversion module is connected to the wireless communication module and the wired communication module respectively;
[0009] The wireless communication module is connected to the wired communication module;
[0010] Both the second receiving port and the wireless transmitting port are located on the wireless communication module;
[0011] The wired transmission port is located on the wired communication module.
[0012] Optionally, the signal conversion module includes a step-down sub-module and an analog-to-digital converter sub-module, wherein...
[0013] The step-down sub-module is connected to the first receiving port;
[0014] The step-down sub-module and the analog-to-digital converter sub-module are connected;
[0015] The analog-to-digital conversion sub-module is connected to the wireless communication module and the wired communication module, respectively.
[0016] Optionally, the wired communication module is a communication module that supports the RS485 protocol.
[0017] Optionally, the wired communication module includes an RS-485 chip, a first isolation circuit, a first protection circuit, and a first power supply circuit, wherein,
[0018] Connect the RXD and TXD pins of the RS-485 chip to the signal conversion module respectively;
[0019] The VCC and GND pins of the RS-485 chip are respectively connected to the first power supply circuit.
[0020] The 485A_IN and 485B_IN pins of the RS-485 chip are respectively connected to the first isolation circuit.
[0021] The first isolation circuit is connected to the first protection circuit;
[0022] The wired transmission port is located on the first protection circuit.
[0023] Optionally, the wired communication module is a communication module that supports the CAN protocol.
[0024] Optionally, the wired communication module includes a CAN chip, a second isolation circuit, a second protection circuit, and a second power supply circuit, wherein,
[0025] Connect the RXD and TXD pins of the CAN chip to the signal conversion module respectively;
[0026] The VIN and GND pins of the CAN chip are respectively connected to the second power supply circuit;
[0027] The CANL and CANH pins of the CAN chip are respectively connected to the second isolation circuit;
[0028] The CANL and CANH pins of the CAN chip are respectively connected to the second protection circuit;
[0029] The wired transmission port is located on the second protection circuit.
[0030] Optionally, the sensor further includes a control switch for controlling the connection / disconnection between the signal conversion module and the wired communication circuit.
[0031] The control switch is connected to the analog-to-digital converter sub-module and the wired communication module, respectively.
[0032] Optionally, when the wired transmission port is connected to the train monitoring equipment, the control switch is in the closed state.
[0033] Optionally, when the wired transmission port is not connected to the train monitoring equipment, the control switch is in the off state.
[0034] Optionally, the wireless communication module is an ESP-WROOM communication module.
[0035] Compared with the prior art, the technical solution provided in this application has the following advantages: In this application embodiment, a wireless communication module is added to the sensor. Thus, when the distance between the railway equipment and the monitoring system is relatively long, multiple sensors as described in this application can be set between them. The sensor connected by the cable transmits data to the wireless communication module of the sensor connected to the monitoring equipment through its own wireless communication module, so that the data is uploaded to the monitoring system through the wired communication module in the sensor. Since the above transmission process involves at least one wireless communication module, and the data transmission distance of the wireless communication module is relatively long and does not require wiring, the length of the cable can be shortened, thereby reducing the complexity of cable wiring. Attached Figure Description
[0036] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.
[0037] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0038] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.
[0039] Figure 1 A schematic diagram of a sensor provided for an embodiment of this application;
[0040] Figure 2 A schematic diagram illustrating data transmission as provided in an embodiment of this application;
[0041] Figure 3 A schematic diagram of a communication network provided in an embodiment of this application;
[0042] Figure 4 A circuit diagram of a communication module provided in an embodiment of this application;
[0043] Figure 5 A circuit diagram of a communication module provided in an embodiment of this application.
[0044] Figure 6 This is a schematic diagram of yet another sensor provided in an embodiment of this application. Detailed Implementation
[0045] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0046] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.
[0047] In railway applications, sensors play a crucial role as relay points in train monitoring systems, connecting railway equipment with the monitoring system, and their applications are widespread. Their core function is to collect analog signals emitted by railway equipment in real time, convert them into digital signals, and then upload them to the monitoring system. Under existing technical solutions, railway equipment generates analog signals, which are transmitted to the sensors via cables. After processing the signals, the sensors upload the data to the train monitoring system using wired communication methods such as RS485 and CAN, allowing the system to perform in-depth analysis, storage, and visualization. However, railway equipment and train monitoring systems are often located far apart, and wired communication methods such as RS485 and CAN have inherent limitations in transmission distance. This necessitates laying long cables between the railway equipment and the smart sensors, significantly increasing the complexity of cable routing and raising construction difficulty and costs.
[0048] To address the aforementioned issues, this application provides a sensor for use in a train monitoring system. The sensor includes a first receiving port, a second receiving port, a signal conversion module, a wired communication module, a wireless communication module, a wireless transmitting port, and a wired transmitting port. The first receiving port is located on the signal conversion module. The signal conversion module is connected to both the wireless communication module and the wired communication module. The second receiving port and the wireless transmitting port are both located on the wireless communication module. The wired transmitting port is located on the wired communication module.
[0049] The system comprises the following components: a first receiving port for receiving wired signals transmitted by railway equipment via cable; a second receiving port for receiving wireless signals from other sensors (which are essentially transmitted through their wireless communication modules); and a wired transmitting port for transmitting the processed wireless signals to other sensors. The wireless communication module enables sensors to transmit data and communicate with other sensors via wireless signals. This module can be a long-range communication module, a short-range communication module, or a cellular communication module. The wired transmitting port transmits the processed wired signals from the wired communication module to the train monitoring equipment. The wired communication module can achieve high-speed, stable data transmission and communication between devices via wired media (such as cables or optical fibers). The wired communication module can be an RS-485 module, an RS-232 module, a CAN (Controller Area Network) module, or other wired communication modules; this is not a limitation. The signal conversion module is used to convert and process signals to obtain the signals required by the train monitoring equipment. This conversion and processing may include step-down processing, analog-to-digital conversion, signal amplification, etc., so that the wireless communication module and the wired communication module can process the output signals.
[0050] In addition, railway equipment includes signals, turnouts, track circuits, and other devices used to generate and transmit various railway signals. These signals contain information such as train operation instructions and track status. Sensors are used to detect signals emitted by railway equipment and convert them into a signal format suitable for train monitoring equipment to receive and process. For example, when the sensor is a signal sensor, it can receive optical or electrical signals emitted by equipment such as signals, convert them, and transmit them so that train monitoring equipment can understand the signal status in real time. Train monitoring equipment includes devices such as Train Operation Monitoring and Recording (LKJ) or Automatic Train Control (ATS). LKJs are mainly used for real-time monitoring and control of train speed, position, signal status, and other information, while ATSs are mainly used for centralized monitoring and management of urban rail transit train operations.
[0051] like Figure 1 As shown, 1 is the first receiving port, 2 is the second receiving port, 3 is the wired transmitting port, and 4 is the wireless transmitting port.
[0052] In this embodiment, since the first receiving port is located on the signal conversion module, it can send the received signal to the signal conversion module. The signal conversion module then processes the received signal to obtain a converted signal, which is recognizable by the train monitoring equipment. Because the converted signal conversion module is connected to the wireless communication module, it sends the signal to the wireless communication module, allowing the module to convert it into a wireless signal for transmission. Because the signal conversion module is also connected to the wired communication module, it sends the converted signal to the wired communication module, enabling it to convert it into a wired signal and transmit it through the wired communication port. Simultaneously, because the wireless communication module is connected to the wired communication module, it can also send the wireless signal received through the second receiving port to the wired communication module, allowing the module to transmit it to the train monitoring equipment.
[0053] It should be noted that when the wireless communication module receives the converted signal, it can encode and encrypt it to generate a wireless signal. After receiving the wireless signal, the wireless communication module can decode and decrypt it to obtain the converted signal, and then send this signal to the wired communication module so that the wired communication module can convert the signal into a wired signal.
[0054] For example, such as Figure 2 As shown, Figure 2 Solid lines in the diagram indicate wired communication between the two devices, specifically via cable. Dashed lines indicate wireless communication. n sensors are installed between the railway equipment and the train monitoring equipment, and these sensors transmit data wirelessly. When the railway equipment transmits a signal to sensor 1, sensor 1 processes the received signal, obtains a wireless signal, and transmits it to sensor 2. This process continues until the wireless signal reaches sensor n, which then sends a signal to the train monitoring equipment.
[0055] Furthermore, the first receiving port of sensor 1 is connected to the cable, enabling it to receive signals transmitted through the cable and transmit them to its own signal conversion module for processing. After processing the signal, the signal conversion module sends it to the wireless communication module, which then generates and transmits a wireless signal.
[0056] Afterwards, the wireless communication module in sensor 2 receives the wireless signal sent by sensor 1 and forwards the wireless signal to the next sensor, until the next sensor is connected to the train monitoring equipment.
[0057] It should be noted that during the above process, since the wired transmission port is not connected to the train monitoring equipment, even if the signal conversion module or the wireless communication module sends the signal to the wired communication module, the wired communication module will not be able to send the signal out.
[0058] In this embodiment, a wireless communication module is added to the sensor. This allows for the installation of multiple sensors (as described in this application) between the railway equipment and the monitoring system when the distance between them is relatively long. Sensors connected by cables transmit data via their own wireless communication modules to the wireless communication modules of sensors connected to the train monitoring equipment, enabling data to be uploaded to the train monitoring equipment via the wired communication modules within those sensors. Since this transmission process involves at least one wireless communication module, and the data transmission distance of the wireless communication module is relatively long without the need for wiring, the cable length can be shortened, thereby reducing the complexity of cable routing.
[0059] In this embodiment, because the signal voltage transmitted by the cable exceeds the processing range of the train monitoring equipment, the signal conversion module needs to step down the voltage. Since the cable transmits analog signals, while the train monitoring equipment can only process digital signals, the signal conversion module also needs to perform analog-to-digital conversion. Therefore, a step-down sub-module and an analog-to-digital conversion sub-module can be set in the signal conversion module. The connection relationships of each sub-module are as follows: Figure 3 As shown, the step-down sub-module is connected to the first receiving port; the step-down sub-module is connected to the analog-to-digital converter sub-module; and the analog-to-digital converter sub-module is connected to the wireless communication module and the wired communication module, respectively.
[0060] The step-down submodule is primarily used to convert higher input voltages into lower, stable voltages suitable for the operation of specific devices or circuits. It ensures that equipment operates within a safe voltage range, preventing damage from excessive voltage, while also improving power supply efficiency. The analog-to-digital converter submodule processes continuously changing analog signals into discrete digital signals for processing, storage, and transmission by computers or other digital devices.
[0061] In practice, when the sensor receives a signal from the railway equipment, it first uses a step-down sub-module to convert the signal voltage into a suitable voltage, and then uses an analog-to-digital converter sub-module to convert it into an analog signal. The analog signal is then sent to the wired communication module and the wireless communication module for transmission.
[0062] It should be noted that the modules included in the signal conversion module are configured according to actual needs. For example, the signal conversion module may include a power supply module to power the step-down sub-module and the analog-to-digital converter sub-module. To achieve precise control of the sensor, the signal conversion module may also include a microcontroller. This microcontroller can receive signals sent by the analog-to-digital converter sub-module and analyze, based on a preset program, whether to send the signal to the wireless communication module or the wired communication module. For example, when the wired communication module is connected to the train monitoring equipment, the microcontroller can control the output signal to be sent to the wired communication module; when the wired communication module is not connected to the train monitoring equipment, the microcontroller controls the output signal to be sent to the wireless communication module.
[0063] In scenarios where cost control is critical and analog-to-digital conversion accuracy is not extremely demanding, a microcontroller can replace the aforementioned analog-to-digital conversion sub-module. Specifically, the signal conversion module includes a step-down sub-module and a microcontroller. The step-down sub-module reduces the voltage of the received signal, allowing it to be input to the microcontroller. The microcontroller performs analog-to-digital conversion and other processing on the input signal, and then sends the processed signal to the wireless communication module or wired communication module.
[0064] For example, replacing the aforementioned analog-to-digital converter sub-module with a microcontroller allows the microcontroller to perform the analog-to-digital conversion process and, depending on the current needs, transmit the signal to either the wireless communication module or the wired communication module. Specifically, the microcontroller can detect whether the wired transmission port is connected to the train monitoring equipment. When connected, it outputs a signal on the pin connected to the wired communication module, enabling the wired communication module to receive and process the signal. When not connected to the train monitoring equipment, it outputs a signal on the pin connected to the wireless communication module, enabling the wireless communication module to receive and process the signal.
[0065] Furthermore, when the transmission relationship between sensors is not... Figure 2 The linear relationship shown is not actually a linear one, but rather a communication network in which these sensors form a communication network, with each node being a sensor, and these sensors transmitting data wirelessly to each other. Specifically, as shown... Figure 3 As shown, in this communication network, some sensors are only connected to railway equipment, some are only connected to train monitoring equipment, and some are neither directly connected to railway equipment nor to the train monitoring system, but connect directly to other devices via wireless communication. In this scenario, the microcontroller can also plan the wireless transmission route and then transmit the cable signal to the train monitoring equipment according to the route. The microcontroller can also monitor the sensor status; when a communication fault is detected, it can quickly report the fault information and automatically plan a new transmission path, ensuring data transmission stability and achieving a series of functions such as self-organization and self-diagnosis.
[0066] Additionally, new sensors can be added to the communication network. These new devices automatically join the network as new nodes, allowing for the planning of transmission routes based on the new network structure. Subsequently, the newly added sensors can upload node information and autonomously plan data transmission routes, significantly reducing engineering workload and improving system scalability.
[0067] In this step, each sensor acts as a node, relaying data to each other to build a mesh network, extending the coverage area to a larger physical area. Simultaneously, the sensor data is transmitted and finally uploaded to the train monitoring equipment.
[0068] In this embodiment of the application, when the wired communication module is a communication module that supports the RS485 protocol, such as Figure 4 As shown, the wired communication module includes an RS-485 chip, a first isolation circuit, a first protection circuit, and a first power supply circuit. The RXD and TXD pins of the RS-485 chip are connected to a signal conversion module, respectively; the VCC and GND pins of the RS-485 chip are connected to the first power supply circuit, respectively; the 485A_IN and 485B_IN pins of the RS-485 chip are connected to the first isolation circuit, respectively; the first isolation circuit is connected to the first protection circuit; and the wired transmission port is located on the first protection circuit.
[0069] The first power supply circuit includes M_3V3, TVS3 (specifically model SMAJ6.5A), L4 (specifically model TMPC0618H4R7MG-D), C46 (capacitor value 1uF / 50V), and C47 (capacitor value 1uF / 50V). M_3V3 is the power input, providing 3.3V. TVS3 is a transient voltage suppressor diode used for overvoltage protection. When a transient high voltage occurs on the power line, it quickly conducts, clamping the overvoltage within a safe range and preventing damage to subsequent circuit components. L4 is a ferrite bead with high-frequency impedance characteristics, suppressing high-frequency noise on the power line for cleaner power. C46 and C47 are both filter capacitors.
[0070] U11 is an RS-485 transceiver chip responsible for converting TTL level signals to RS-485 level signals for differential transmission, and converting received RS-485 differential signals back to TTL level signals. VCC (pin 1) is the power supply pin, connected to a 3.3V power supply. GND (pin 2) is the ground pin. TXD (pin 3) is the transmit data pin, connected to the signal conversion module. RXD (pin 4) is the receive data pin, also connected to the signal conversion module. RE / DE (pin 5) is the receive enable / transmit enable pin. A (pin 9) is the positive terminal of the RS-485 bus, connected to the A line of an external RS-485 bus. B (pin 8) is the negative terminal of the RS-485 bus, connected to the B line of an external RS-485 bus. AGND (pin 10) is the analog ground pin, grounded.
[0071] The first protection circuit includes L5 (specifically model ACT45B-510-2P), C44 (capacitor value 100pF), C45 (capacitor value 100pF), TVS1 (capacitor value SMBJ11CA), TVS2 (specifically model SMBJ12CA), and TVS4 (specifically model SMBJ12CA). L5 is a signal isolation transformer, providing electrical isolation between the RS-485 bus signal and the internal circuitry of the chip. C44 and C45 are high-frequency filter capacitors. TVS1 (SMBJ11CA), TVS2 (SMBJ12CA), and TVS4 (SMBJ12CA) are transient voltage suppression diodes.
[0072] The first circuit module includes R51 (resistance value of 120R) and J3 (SIP2-M): R51 is a terminating resistor. J3 is the external interface of the RS-485 bus, which is the wired transmission port in this application.
[0073] In this embodiment of the application, when the wired communication module is a communication module that supports the CAN protocol, such as Figure 5 As shown. The wired communication module includes a CAN chip, a second isolation circuit, a second protection circuit, and a second power supply circuit. The RXD and TXD pins of the CAN chip are connected to the signal conversion module, respectively; the VIN and GND pins of the CAN chip are connected to the second power supply circuit, respectively; the CANL and CANH pins of the CAN chip are connected to the second isolation circuit, respectively; and the CANL and CANH pins of the CAN chip are connected to the second protection circuit, respectively. The wired transmission port is located on the second protection circuit.
[0074] In the second power supply circuit, M_3V3 is the power input, providing a 3.3V voltage. C48 (capacitor value 10uF / 16V) is the power filter capacitor. It is connected in parallel across the power input to filter out high-frequency noise and ripple in the power supply, making the power supplied to the CAN chip more stable and pure, ensuring the stability of the chip's operation. The CAN chip is a CTM1051A chip, which is an isolated CAN transceiver used for CAN-bus bus transmission and isolation in industrial fields. It includes the VIN pin (pin 1), which is the power input pin, connected to the 3.3V power supply. The GND pin (pin 2) is the ground pin, providing an electrical reference ground for the chip. The TXD pin (pin 3) is the transmit data pin, connected to the signal conversion module. The RXD pin (pin 4) is the receive data pin, also connected to the signal conversion module. The CANH pin (pin 6) is the high-level signal pin of the CAN bus, connected to the CANH line of the CAN bus. The CANL pin (pin 7) is the low-level signal pin of the CAN bus, connected to the CANL line of the CAN bus. CANGND pin (pin 8): The signal ground pin of the CAN bus, which provides a signal reference ground for CAN bus communication.
[0075] The second protection circuit consists of J12 and R16. J12 is a 2-pin interface, the external interface of the CAN bus, and the wired transmission port of this application, used to connect to external CAN bus devices. CANHIN and CANLIN correspond to the CANH and CANL lines of the CAN bus, respectively. R16 is a 120Ω resistor, essentially a terminating resistor. The second protection circuit also consists of ESD1 (specifically model PESD24VL2BT) and ESD2 (specifically model PESD5V0S1BA), both of which are electrostatic discharge (ESD) diodes. ESD1 protects the CANH and CANL lines from ESD damage. ESD2 provides additional ESD protection for the CANL line.
[0076] In this application, to precisely control the signal transmitted by the sensor, a control switch can be set between the wired communication module and the signal conversion module. This control switch controls whether the wired communication module is used. Figure 6 As shown, the sensor also includes a control switch, which is used to control the connection and disconnection between the signal conversion module and the wired communication circuit. The control switch is connected to the analog-to-digital conversion sub-module and the wired communication module, respectively.
[0077] In implementation, a control switch is set between the signal conversion module and the wired communication module. When the wired transmission port is connected to the train monitoring equipment, the control switch is set to the closed state, and when the wired transmission port is not connected to the train monitoring equipment, the control switch is set to the open state.
[0078] Furthermore, a control switch can be installed between the wired communication module and the wireless communication module to control whether the signal generated by the wireless communication module is sent to the wired communication module. For example, when the wired transmission port is connected to the train monitoring equipment, the control switch is set to the closed state; when the wired transmission port is not connected to the train monitoring equipment, the control switch is set to the open state.
[0079] In this embodiment, the sensor further includes a power supply circuit for supplying power to the modules in the sensor. The power supply circuit is connected to the signal conversion module, the wireless communication module, and the wired communication module, respectively.
[0080] In practice, the power supply circuit is connected to the signal conversion module, wireless communication module, and wired communication module respectively to supply power to the signal conversion module, wireless communication module, and wired communication module so that they can operate normally.
[0081] It should be noted that when the wired communication module is a communication module that supports the CAN protocol, or a communication module that supports the RS485 protocol or other modules, the power supply circuit includes the power supply circuit in the wired communication module, that is, the power supply circuit includes a first power supply circuit and a second power supply circuit.
[0082] Furthermore, in order to achieve precise control of the sensor, the sensor also includes a monitoring circuit, which is connected to the power supply circuit.
[0083] The monitoring circuit is used to wake up the power supply circuit when a signal is detected.
[0084] In practice, when the monitoring circuit detects a signal, it can wake up the power supply circuit so that the power supply circuit can supply power to other circuits.
[0085] Furthermore, the wireless communication module is the ESP-WROOM communication module.
[0086] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.
[0087] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented using software plus a general-purpose hardware platform, or of course, using hardware. Based on this understanding, the above technical solutions, in essence or the parts that contribute to the related technology, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.
[0088] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.
[0089] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.
Claims
1. A sensor applied to a train monitoring system, characterized by, The sensor includes a first receiving port, a second receiving port, a signal conversion module, a wired communication module, a wireless communication module, a wireless transmitting port, and a wired transmitting port. The first receiving port is used to receive wired signals transmitted by railway equipment via cable. The second receiving port is used to receive wireless signals transmitted by other sensors. The wireless transmitting port is used to transmit the wireless signals processed by the wireless communication module to other sensors. The wired transmitting port is used to transmit the wired signals processed by the wired communication module to train monitoring equipment. The first receiving port is located on the signal conversion module; The signal conversion module is connected to the wireless communication module and the wired communication module respectively; The wireless communication module is connected to the wired communication module; Both the second receiving port and the wireless transmitting port are located on the wireless communication module; The wired transmission port is located on the wired communication module.
2. The sensor of claim 1, wherein, The signal conversion module includes a step-down sub-module and an analog-to-digital converter sub-module, wherein The step-down sub-module is connected to the first receiving port; The step-down sub-module and the analog-to-digital converter sub-module are connected; The analog-to-digital conversion sub-module is connected to the wireless communication module and the wired communication module, respectively.
3. The sensor of claim 1, wherein, The wired communication module is a communication module that supports the RS485 protocol.
4. The sensor of claim 3, wherein, The wired communication module includes an RS-485 chip, a first isolation circuit, a first protection circuit, and a first power supply circuit, wherein... Connect the RXD and TXD pins of the RS-485 chip to the signal conversion module respectively; The VCC and GND pins of the RS-485 chip are respectively connected to the first power supply circuit. The 485A_IN and 485B_IN pins of the RS-485 chip are respectively connected to the first isolation circuit. The first isolation circuit is connected to the first protection circuit; The wired transmission port is located on the first protection circuit.
5. The sensor of claim 1, wherein, The wired communication module is a communication module that supports the CAN protocol.
6. The sensor according to claim 5, characterized in that, The wired communication module includes a CAN chip, a second isolation circuit, a second protection circuit, and a second power supply circuit, wherein... Connect the RXD and TXD pins of the CAN chip to the signal conversion module respectively; The VIN and GND pins of the CAN chip are respectively connected to the second power supply circuit; The CANL and CANH pins of the CAN chip are respectively connected to the second isolation circuit; The CANL and CANH pins of the CAN chip are respectively connected to the second protection circuit; The wired transmission port is located on the second protection circuit.
7. The sensor of claim 2, wherein, The sensor also includes a control switch, which is used to control the connection and disconnection between the signal conversion module and the wired communication circuit. The control switch is connected to the analog-to-digital converter sub-module and the wired communication module, respectively.
8. The sensor of claim 7, wherein, When the wired transmission port is connected to the train monitoring equipment, the control switch is in the closed state.
9. The sensor of claim 7, wherein, When the wired sending port is not connected with the train monitoring device, the control switch is in an off state.
10. The sensor of claim 1, wherein, The wireless communication module is an ESP-WROOM communication module.