Positioning and early warning system for metro vehicle
The subway vehicle positioning and early warning system utilizes vehicle detection and ranging modules to provide accurate vehicle location information. Combined with the frequency change signal of the early warning module, it solves the safety and efficiency problems of subway vehicles entering the station, and realizes accurate navigation and a safe entry process.
Patent Information
- Application Number
- CN202423299970.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2034-12-31
AI Technical Summary
When subway trains enter a station, due to their high speed and limited visibility, drivers have difficulty accurately judging the distance between the train and the stopping position, resulting in inaccurate entry speeds that affect safety and operational efficiency.
The positioning and early warning system consists of a power supply, a vehicle detection module, an early warning module, a ranging module, a switch module, and a main control module. The vehicle detection module accurately captures vehicle dynamics, triggering the ranging and early warning modules to provide power, thus providing accurate navigation and early warning signals with frequencies varying with distance. The main control module ensures smooth information flow.
It improves the safety and controllability of subway trains entering stations, enhances the accuracy of driver navigation and operational scheduling support, and improves the overall efficiency and safety of the subway system.
Smart Images
Figure CN223736048U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present disclosure relates to the technical field of vehicle positioning, and in particular to a positioning and early warning system for a subway vehicle. BACKGROUND
[0002] In the rapidly developing urban rail transit system, the subway, as an important part of urban public transportation, its operation efficiency and safety are directly related to the travel experience and life and property safety of the general public. However, during the process of the subway vehicle entering the station, due to factors such as high speed and limited visibility, the driver has difficulty in accurately judging the distance between the vehicle and the parking position, which may easily lead to problems such as excessive speed when entering the station and inaccurate parking position, and thus may cause safety accidents and affect the overall operation efficiency of the subway system.
[0003] In order to solve the above problems, the traditional method relies on manual observation and experience judgment, but this method has great subjectivity and uncertainty, and it is difficult to meet the high standard requirements of modern subway systems for safety and efficiency. CONTENT OF THE INVENTION
[0004] The embodiments of the present disclosure provide a positioning and early warning system for a subway vehicle to meet the high standard requirements of the subway system for safety and efficiency.
[0005] The embodiments of the present disclosure provide a positioning and early warning system for a subway vehicle, comprising:
[0006] a power supply, a first vehicle detection module, a first early warning module, a distance measuring module, a first switch module, a main control module and a communication module;
[0007] The power supply end of the first vehicle detection module is connected to the power supply, and the output end of the first vehicle detection module is connected to the main control module;
[0008] The first end of the first switch module is connected to the power supply, the second end of the first switch module is connected to the power supply end of the first early warning module and the distance measuring module respectively, the control end of the first switch module is connected to the main control module, and the output end of the distance measuring module is connected to the main control module;
[0009] The output end of the distance measuring module is connected to the input end of the first early warning module, and the first early warning module is used to send a first positioning and early warning signal;
[0010] The main control module is in communication connection with a terminal through the communication module.
[0011] In an exemplary embodiment of the present disclosure, a second vehicle detection module and a second early warning module are further included.
[0012] The power supply end of the second early warning module and the power supply end of the second vehicle detection module are connected with the second end of the first switch module, and the output end of the second vehicle detection module is connected with the input end of the master control module and the second early warning module respectively;
[0013] The second early warning module is used for emitting a second positioning early warning signal.
[0014] In an exemplary embodiment of the present disclosure, the first switch module comprises a switch tube Q1.
[0015] The first end of the switch tube Q1 is connected with a power supply, the second end of the switch tube Q1 is connected with the power supply end of the first early warning module and the ranging module respectively, and the control end of the switch tube Q1 is connected with the master control module.
[0016] In an exemplary embodiment of the present disclosure, the first switch module further comprises a resistor R1, a capacitor C2 and a triode Q2.
[0017] The first end of the resistor R1 is connected with the second end of the switch tube Q1, the second end of the resistor R1 is grounded through the capacitor C2, the second end of the resistor R1 is connected with the base of the triode Q2, the collector of the triode Q2 is connected with a power supply, and the emitter of the triode Q2 is connected with the power supply end of the first early warning module and the ranging module respectively.
[0018] In an exemplary embodiment of the present disclosure, the first early warning module comprises a resistor R2, a capacitor C3, a voltage-to-frequency converter U1, a switch tube Q3 and a light emitting diode LED1.
[0019] The first end of the resistor R2 is connected with the output end of the ranging module, the second end of the resistor R2 is grounded through the capacitor C3, the second end of the resistor R2 is connected with the input end of the voltage-to-frequency converter U1, the power supply end of the voltage-to-frequency converter U1 is connected with a power supply, the output end of the voltage-to-frequency converter U1 is connected with the control end of the switch tube Q3, the first end of the switch tube Q3 is connected with a power supply, the second end of the switch tube Q3 is connected with the anode of the light emitting diode LED1, and the cathode of the light emitting diode LED1 is grounded.
[0020] In an exemplary embodiment of the present disclosure, the first early warning module further comprises a triode Q4 and a triode Q5.
[0021] The base of the triode Q4 is connected with the output of the voltage-frequency converter U1, the base of the triode Q4 is connected with the base of the triode Q5, the collector of the triode Q4 is connected with a power supply, the emitter of the triode Q4 is connected with the emitter of the triode Q5, the collector of the triode Q5 is grounded, and the emitter of the triode Q4 is connected with the control end of the switch tube Q3.
[0022] In an example embodiment of the present disclosure, the second vehicle detection module comprises an infrared emission circuit and an infrared receiving circuit.
[0023] The power supply end of the infrared emission circuit and the infrared receiving circuit is connected with the second end of the first switch module, the infrared emission circuit is used for emitting an infrared light signal, the infrared receiving circuit is used for receiving the infrared light signal emitted by the infrared emission circuit, and the infrared receiving circuit is connected with the master control module.
[0024] In an example embodiment of the present disclosure, the second early warning module comprises an operational amplifier U2, a NOT gate U3, a switch tube Q6 and a light emitting diode LED2.
[0025] The inverting input end of the operational amplifier U2 is connected with a Vref reference voltage, the non-inverting input end of the operational amplifier U2 is connected with the output end of the infrared receiving circuit, the output end of the operational amplifier U2 is connected with the input end of the NOT gate U3, the output end of the NOT gate U3 is connected with the control end of the switch tube Q6, the first end of the switch tube Q6 is connected with a power supply, the second end of the switch tube Q6 is connected with the anode of the light emitting diode LED2, and the cathode of the light emitting diode LED2 is grounded.
[0026] The positioning early warning system for a subway vehicle provided by the example embodiment of the present disclosure has the following beneficial effects: the example embodiment of the present disclosure accurately captures the vehicle dynamics through the first vehicle detection module, and transmits the information to the master control module in real time, triggering the first switch module to supply power to the early warning and distance measurement module, effectively managing the power consumption. The distance measurement module measures the distance between the vehicle and the parking position in real time, providing accurate navigation for the driver. At the same time, the distance information also drives the first early warning module to send a warning signal with a frequency that changes with the distance, directly reminding the driver to slow down and prepare to stop, thereby enhancing the safety and controllability of the process of entering the station. The master control module keeps real-time communication with the terminal through the communication module, ensuring smooth information flow and providing strong support for subway operation scheduling. Thus, the high standards of safety and efficiency of the subway system are improved. BRIEF DESCRIPTION OF DRAWINGS
[0027] In order to make the technical solutions in the embodiments of the present disclosure clearer, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creative labor.
[0028] Figure 1 is a structural schematic diagram of a positioning early warning system of a subway vehicle provided by an embodiment of the present disclosure;
[0029] Figure 2 is a circuit diagram of a first switch module provided by an embodiment of the present disclosure;
[0030] Figure 3 is a circuit diagram of a first early warning module provided by an embodiment of the present disclosure;
[0031] Figure 4 is a circuit diagram of a second early warning module provided by an embodiment of the present disclosure. DETAILED DESCRIPTION
[0032] In order to make those skilled in the art better understand the present scheme, the following will combine the drawings in the embodiments of the present scheme to clearly describe the technical solutions in the embodiments of the present scheme. Obviously, the described embodiments are part of the embodiments of the present scheme, not all the embodiments. Based on the embodiments in the present scheme, all other embodiments obtained by those skilled in the art without creative labor should be within the scope of protection of the present scheme.
[0033] The term "include" and other any variants thereof in the specification and claims of the present scheme and the above-mentioned drawings means "include but not limited to", which is intended to cover non-exclusive inclusion, and is not limited to the examples listed in the text. In addition, the terms "first" and "second" are used to distinguish different objects, not to describe a specific order.
[0034] The implementation of the present disclosure will be described in detail in the following in combination with specific drawings:
[0035] Figure 1 is a structural schematic diagram of a positioning early warning system of a subway vehicle provided by an embodiment of the present disclosure. Referring to Figure 1The positioning early warning system of the subway vehicle comprises a power supply, a first vehicle detection module, a first early warning module, a distance measuring module, a first switch module, a main control module and a communication module; the power supply end of the first vehicle detection module is connected with the power supply, and the output end of the first vehicle detection module is connected with the main control module; the first end of the first switch module is connected with the power supply, the second end of the first switch module is connected with the power supply end of the first early warning module and the distance measuring module respectively, the control end of the first switch module is connected with the main control module, and the output end of the distance measuring module is connected with the main control module; the output end of the distance measuring module is connected with the input end of the first early warning module, and the first early warning module is used for sending a first positioning early warning signal; the main control module is in communication connection with a terminal through the communication module.
[0036] In the embodiment, the first detection module can be arranged at a specific position in front of the station entrance of the subway vehicle, for example, at a position 100 meters in front of the station entrance of the subway vehicle. The first vehicle detection module is in an implementation working state. The first detection module is used for detecting that the subway vehicle is about to arrive at the station entrance, and the first detection module converts the detected subway vehicle information into a corresponding electrical signal and sends the electrical signal to the main control module. When the main control module receives the electrical signal output by the first detection module, it indicates that the subway vehicle is about to enter the station entrance. At this time, the main control module can send a control instruction to the control end of the first switch module, and the first switch module responds to make the power supply end of the first early warning module and the distance measuring module connected with the power supply, so that the first early warning module and the distance measuring module enter a working state. When there is no vehicle to arrive, the first early warning module and the distance measuring module are disconnected with the power supply, thereby saving electric energy.
[0037] In the embodiment, the first vehicle detection module can be realized by the technical means of electromagnetic induction. An induction coil can be arranged at a specific position. When the subway vehicle is about to enter the station, the magnetic field around the induction coil changes, and the changed magnetic signal is converted into an electrical signal and sent to the main control module, thereby realizing detection of the subway vehicle.
[0038] When the first vehicle detection module detects the subway vehicle, the distance measuring module starts to work. In the embodiment, the distance measuring module can detect the distance from the subway vehicle to the parking position by the principle of laser ranging, and convert the distance signal into a corresponding electrical signal and send the electrical signal to the main control module. The main control module can send the signal to the display terminal in the vehicle cab through the communication module, so that the driver can check the distance from the vehicle to the parking position during driving through the display terminal in the vehicle cab, thereby reminding the driver that the vehicle is about to enter the station and should slow down in front.
[0039] Meanwhile, the electric signal corresponding to the distance output by the distance measuring module can also be sent to the input end of the first early warning module, and the first early warning module can be a flashing light early warning signal for reminding the driver to drive at a reduced speed. In the embodiment, the frequency of the flashing light early warning signal generated by the first early warning module can change based on the change of the distance of the metro vehicle to the parking position, for example, as the metro vehicle gets closer to the parking position, the frequency of the flashing light early warning signal generated by the first early warning module can get faster, so as to remind the driver to drive at a reduced speed and to accurately arrive at the parking position.
[0040] As can be seen from the above, in the embodiment, the first vehicle detection module accurately captures the vehicle dynamics and transmits the information to the main control module in real time, triggering the first switch module to supply power to the early warning and distance measuring modules, effectively managing the consumption of electric energy. The distance measuring module measures the distance between the vehicle and the parking position in real time to provide accurate navigation for the driver. Meanwhile, the distance information also drives the first early warning module to send a warning signal with a frequency that changes with the distance, directly reminding the driver to drive at a reduced speed and prepare to park, thereby enhancing the safety and controllability of the process of entering the station. The main control module keeps real-time communication with the terminal through the communication module, ensuring smooth information flow and providing strong support for metro operation and dispatching. The efficiency and safety of the metro vehicle entering the station are improved.
[0041] As shown in FIG. 1, Figure 1 In the embodiment, the second vehicle detection module and the second early warning module are connected with the second end of the first switch module, that is, the second vehicle detection module and the second early warning module also need to be detected by the first vehicle detection module to enter the working state, thereby saving electric energy.
[0042] In the embodiment, the second vehicle detection module and the second early warning module are connected with the second end of the first switch module, that is, the second vehicle detection module and the second early warning module also need to be detected by the first vehicle detection module to enter the working state, thereby saving electric energy.
[0043] In the embodiment, the second vehicle detection module is arranged at the parking position. When the metro vehicle is about to enter the station entrance, the vehicle starts to slow down. When the vehicle arrives at the parking position, the second vehicle detection module can convert the signal into a corresponding electric signal and send it to the main control module. Then, the main control module can send the signal to the display terminal in the cab through the communication module to remind the driver to park. Meanwhile, the electric signal output by the second vehicle detection module can also be sent to the input end of the second early warning module, and the second early warning module can also remind the driver to park.
[0044] In the embodiment, the second vehicle detection module can be implemented by infrared technology. An infrared transmitter and an infrared receiver are arranged at the parking position of the metro vehicle. The infrared transmitter is configured to transmit infrared signals, and the infrared receiver is configured to receive the infrared signals. When the metro vehicle does not arrive at the parking position, the infrared receiver can receive the infrared signals transmitted by the infrared transmitter, and at this time, the infrared receiver can output an electrical signal. When the metro vehicle arrives at the parking position, the infrared signals transmitted by the infrared transmitter are blocked by the metro vehicle, and the infrared receiver cannot receive the infrared signals transmitted by the infrared transmitter, and at this time, the infrared receiver can output another electrical signal. The main control module determines whether the metro vehicle arrives at the parking position by the electrical signal output by the infrared transmitter.
[0045] The second early warning module can also realize early warning by light signals. When the second vehicle detection module detects that the metro vehicle arrives at the parking position, the second early warning module receives the corresponding electrical signal, and at this time, the second early warning module sends a continuous light signal to remind the driver that the metro vehicle has arrived at the designated parking position.
[0046] As can be seen from the above, the second vehicle detection module and the second early warning module are connected with the power supply through the first switch module. When the vehicle arrives at the parking position, the second vehicle detection module converts the signal into an electrical signal and transmits it to the main control module and the second early warning module. The main control module sends the signal to the cab display terminal through the communication module to remind the driver to park. The second early warning module sends a light signal to further remind the driver that the vehicle has arrived at the designated parking position, thereby ensuring the safe and accurate parking of the vehicle and improving the safety and efficiency of the vehicle operation.
[0047] As shown in FIG. 1, Figure 2 In the embodiment, the first switch module includes a switch tube Q1. The first end of the switch tube Q1 is connected with the power supply, the second end of the switch tube Q1 is connected with the power supply end of the first early warning module and the ranging module respectively, and the control end of the switch tube Q1 is connected with the main control module.
[0048] In the embodiment, when the metro vehicle has not been detected by the first vehicle detection module, the main control module does not send a driving signal to the control end of the switch tube Q1, and at this time, the switch tube Q1 is in a cut-off state. In this way, the power supply ends of the first early warning module and the ranging module are disconnected with the power supply, and the two modules do not work, thereby achieving the purpose of saving electric energy.
[0049] When the first vehicle detection module detects that the subway vehicle is about to enter the station, the first vehicle detection module can convert the detected vehicle information into an electrical signal and send it to the main control module. After receiving this signal, the main control module sends a high-level control signal to the control end of the switch tube Q1, making the switch tube Q1 conductive. The power supply is connected to the power supply end of the first warning module and the distance measuring module, and the two modules start working. The distance measuring module starts detecting the distance from the vehicle to the parking position, and converts the distance signal into an electrical signal and sends it to the main control module and the first warning module. The first warning module sends a corresponding flashing light warning signal to remind the driver according to the distance signal.
[0050] As shown in Figure 2 In an embodiment of the present application, the first switch module further comprises: a resistor R1, a capacitor C2 and a triode Q2; the first end of the resistor R1 is connected to the second end of the switch tube Q1, the second end of the resistor R1 is grounded through the capacitor C2, the second end of the resistor R1 is connected to the base of the triode Q2, the collector of the triode Q2 is connected to the power supply, and the emitter of the triode Q2 is connected to the power supply end of the first warning module and the distance measuring module.
[0051] In this embodiment, the resistor R1, the capacitor C2 and the triode Q2 constitute a slow start circuit. In the initial state, the voltage across the capacitor C2 is zero, and the triode Q2 is in the off state. When the main control module controls the switch tube Q1 to be conductive according to the signal of the first vehicle detection module, the power supply is connected to the circuit. At this time, the current charges the capacitor C2 through the resistor R1, and with the charging process, the voltage across the capacitor C2 gradually rises. When the voltage reaches the conduction threshold of the triode Q2, the triode Q2 begins to conduct, so that the power supply end of the first warning module and the distance measuring module gradually obtains power supply.
[0052] In this embodiment, the slow start avoids the impact of instantaneous power-on on the first warning module and the distance measuring module, prevents the possible damage of components due to excessive current, prolongs the service life of the equipment, and at the same time ensures that the system enters the working state smoothly and orderly, and provides accurate warning and distance measuring functions for the subway vehicle entering the station.
[0053] As shown in Figure 3 In an embodiment of the present application, the first warning module comprises: a resistor R2, a capacitor C3, a voltage-to-frequency converter U1, a switch tube Q3 and a light emitting diode LED1; the first end of the resistor R2 is connected to the output end of the distance measuring module, the second end of the resistor R2 is grounded through the capacitor C3, the second end of the resistor R2 is connected to the input end of the voltage-to-frequency converter U1, the power supply end of the voltage-to-frequency converter U1 is connected to the power supply, the output end of the voltage-to-frequency converter U1 is connected to the control end of the switch tube Q3, the first end of the switch tube Q3 is connected to the power supply, the second end of the switch tube Q3 is connected to the anode of the light emitting diode LED1, and the cathode of the light emitting diode LED1 is grounded.
[0054] In this embodiment, the ranging module will detect the distance between the subway vehicle and the parking position in real time and output a related voltage signal. As the vehicle gradually approaches the parking position, the output voltage will increase accordingly.
[0055] The voltage signal is transmitted through resistor R2, while capacitor C3 acts as a filter, ensuring a more stable signal entering the input terminal of voltage-to-frequency converter U1. Voltage-to-frequency converter U1 converts the voltage based on its received voltage. Due to its characteristics, the higher the input voltage (i.e., the closer the vehicle is to the parking position), the higher the frequency square wave signal output by voltage-to-frequency converter U1.
[0056] The square wave signal output by the voltage-to-frequency converter U1 is transmitted to the control terminal of the switching transistor Q3. When a square wave signal arrives, the switching transistor Q3 can switch between on and off according to the high and low levels of the square wave. When the switching transistor Q3 is on, the power supply and the light-emitting diode LED1 form a circuit, and LED1 lights up. As the frequency of the square wave signal changes, the frequency at which the switching transistor Q3 is on and off also changes, causing the light-emitting diode LED1 to flash. The closer the vehicle is to the parking position, the higher the frequency of the square wave signal, and the faster the LED1 flashes. This serves to alert the driver to the change in the distance between the vehicle and the parking position, prompting the driver to slow down and stop precisely.
[0057] As can be seen from the above, this embodiment can receive the voltage signal output by the ranging module related to the distance from the vehicle to the parking position in real time. After the signal is stabilized by resistor R2 and capacitor C3, it is input to voltage-to-frequency converter U1, which converts the voltage signal into square wave signals of different frequencies. Switch Q3 controls LED1 to blink according to the square wave signal. The closer the vehicle is to the parking position, the higher the square wave frequency and the faster the LED blinks. This effectively reminds the driver of changes in vehicle distance, prompting the driver to slow down and stop accurately, thus improving the safety and reliability of subway vehicles entering the station.
[0058] like Figure 3 As shown, in one embodiment of this public, the first warning module further includes: transistor Q4 and transistor Q5; the base of transistor Q4 is connected to the output terminal of voltage-to-frequency converter U1, the base of transistor Q4 is connected to the base of transistor Q5, the collector of transistor Q4 is connected to the power supply, the emitter of transistor Q4 is connected to the emitter of transistor Q5, the collector of transistor Q5 is grounded, and the emitter of transistor Q4 is connected to the control terminal of switching transistor Q3.
[0059] In this embodiment, the output frequency signal of the voltage-to-frequency converter U1 has weak driving capability and cannot directly drive the switching transistor Q3 to turn on or off. Therefore, transistors Q4 and Q5 constitute a driving circuit.
[0060] The square wave signal outputted by the voltage-to-frequency converter U1 is connected to the base of the triode Q4 and also connected to the base of Q5 connected to the base of Q4. When the square wave signal is high, the triode Q4 is turned on and Q5 is turned off, and the current flows from the power supply to the control end of the switch tube Q3 through Q4, so that the switch tube Q3 has the condition of being turned on. When the square wave signal is low, the triode Q4 is turned off and Q5 is turned on, and the current at the control end of the switch tube Q3 is cut off, so that Q3 is turned off. In this way, through this drive circuit, the weak square wave signal is converted into a control signal sufficient to drive the switch tube Q3 to be turned on and off stably, so as to ensure that the light-emitting diode LED1 flickers as required and accurately reminds the driver.
[0061] In an embodiment of the present disclosure, the second vehicle detection module comprises: an infrared emission circuit and an infrared receiving circuit; the power supply end of the infrared emission circuit and the infrared receiving circuit is connected to the second end of the first switch module, the infrared emission circuit is used for emitting an infrared light signal, the infrared receiving circuit is used for receiving the infrared light signal emitted by the infrared emission circuit, and the infrared receiving circuit is connected to the main control module.
[0062] In the embodiment, when the subway vehicle has not arrived at the parking position, the infrared receiving circuit can normally receive the infrared light signal emitted by the infrared emission circuit, at this time, the infrared receiving circuit outputs a corresponding electric signal to the main control module based on the received infrared light signal, and the electric signal indicates that the vehicle has not arrived at the designated parking position.
[0063] When the subway vehicle gradually drives to the parking position, the vehicle blocks the infrared light signal emitted by the infrared emission circuit, so that the infrared receiving circuit cannot receive the infrared light signal, at this time, the infrared receiving circuit correspondingly outputs another electric signal to the main control module, so as to inform the main control module that the vehicle has arrived at the parking position, and the main control module can send a prompt information to the cab display terminal through the communication module according to the signal, and also can trigger the second warning module to work, so as to remind the driver to stop in time.
[0064] As shown in the figure, Figure 4 In an embodiment of the present disclosure, the second warning module comprises: an operational amplifier U2, a NOT gate U3, a switch tube Q6 and a light-emitting diode LED2; the inverting input end of the operational amplifier U2 is connected to a Vref reference voltage, the non-inverting input end of the operational amplifier U2 is connected to the output end of the infrared receiving circuit, the output end of the operational amplifier U2 is connected to the input end of the NOT gate U3, the output end of the NOT gate U3 is connected to the control end of the switch tube Q6, the first end of the switch tube Q6 is connected to the power supply, the second end of the switch tube Q6 is connected to the anode of the light-emitting diode LED2, and the cathode of the light-emitting diode LED2 is grounded.
[0065] In the embodiment, the infrared receiving circuit can output corresponding electrical signal according to whether the infrared light signal emitted by the infrared emitting circuit is received. When the vehicle has not arrived at the parking position, the infrared receiving circuit can normally receive the infrared light signal, and the voltage signal output by the infrared receiving circuit is transmitted to the non-inverting input terminal of the operational amplifier U2. At this time, the electrical signal is compared with the Vref reference voltage connected to the inverting input terminal. In the embodiment, the reference voltage is 2.5 V. When the vehicle has not arrived at the parking position, the voltage signal output by the infrared receiving circuit is 5 V. The operational amplifier U2 outputs a high-level signal, which becomes a low-level signal after passing through the NOT gate U3 and is transmitted to the control terminal of the switch tube Q6, so that the switch tube Q6 is cut off, the light-emitting diode LED2 does not emit light, and it is indicated that the vehicle has not arrived at the parking position.
[0066] When the subway vehicle arrives at the parking position, the infrared receiving circuit cannot receive the infrared light signal due to being blocked by the vehicle. At this time, the voltage signal output by the infrared receiving circuit is 0, the operational amplifier U2 outputs a low-level signal, which becomes a high-level signal after passing through the NOT gate U3 and is transmitted to the control terminal of the switch tube Q6, so that the switch tube Q6 is turned on, the power supply and the light-emitting diode LED2 form a loop, the LED2 is lighted, and it is indicated that the vehicle has arrived at the parking position. Through the level change control, it is realized that the light-emitting diode LED2 is controlled to be lighted or not according to whether the vehicle has arrived at the parking position, so as to directly remind the driver of the state of the vehicle and assist the driver to accurately park the vehicle.
[0067] The above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than limit the same. Although the present disclosure is described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features thereof can be replaced by equivalent ones. The modification or replacement does not make the essence of the corresponding technical solution deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure.
Claims
1. A positioning and warning system for a subway vehicle, characterized in that, The application relates to a vehicle positioning warning system, which comprises the following parts: a power supply, a first vehicle detection module, a first warning module, a distance measuring module, a first switch module, a main control module and a communication module. The power supply end of the first vehicle detection module is connected with the power supply, and the output end of the first vehicle detection module is connected with the main control module. The first end of the first switch module is connected with the power supply, the second end of the first switch module is connected with the power supply end of the first warning module and the distance measuring module respectively, the control end of the first switch module is connected with the main control module, and the output end of the distance measuring module is connected with the main control module. The output end of the distance measuring module is connected with the input end of the first warning module, and the first warning module is used for emitting a first positioning warning signal. The main control module is connected with a terminal in communication through the communication module. The application further comprises the following parts:
2. A positioning warning system for a subway vehicle as defined in claim 1, wherein a second vehicle detection module and a second warning module. The power supply end of the second warning module and the power supply end of the second vehicle detection module are connected with the second end of the first switch module, and the output end of the second vehicle detection module is connected with the input end of the main control module and the second warning module respectively. The second warning module is used for emitting a second positioning warning signal. The first switch module comprises a switch tube Q1.
3. The positioning and warning system for a subway vehicle as set forth in claim 1, wherein The first end of the switch tube Q1 is connected with the power supply, the second end of the switch tube Q1 is connected with the power supply end of the first warning module and the distance measuring module respectively, and the control end of the switch tube Q1 is connected with the main control module. The first switch module further comprises a resistor R1, a capacitor C2 and a triode Q2.
4. The positioning and warning system for a subway vehicle as claimed in claim 3, wherein The first end of the resistor R1 is connected with the second end of the switch tube Q1, the second end of the resistor R1 is grounded through the capacitor C2, the second end of the resistor R1 is connected with the base of the triode Q2, the collector of the triode Q2 is connected with the power supply, and the emitter of the triode Q2 is connected with the power supply end of the first warning module and the distance measuring module respectively. The first warning module comprises a resistor R2, a capacitor C3, a voltage-to-frequency converter U1, a switch tube Q3 and a light emitting diode LED1.
5. The positioning and warning system for a subway vehicle as set forth in claim 1, wherein The first end of the resistor R2 is connected with the output end of the distance measuring module, the second end of the resistor R2 is grounded through the capacitor C3, the second end of the resistor R2 is connected with the input end of the voltage-to-frequency converter U1, the power supply end of the voltage-to-frequency converter U1 is connected with the power supply, the output end of the voltage-to-frequency converter U1 is connected with the control end of the switch tube Q3, the first end of the switch tube Q3 is connected with the power supply, the second end of the switch tube Q3 is connected with the anode of the light emitting diode LED1, and the cathode of the light emitting diode LED1 is grounded. The first warning module further comprises a triode Q4 and a triode Q5.
6. A positioning warning system for a subway vehicle as defined in claim 5, wherein The base of the triode Q4 is connected with the output end of the voltage-to-frequency converter U1, the base of the triode Q4 is connected with the base of the triode Q5, the collector of the triode Q4 is connected with the power supply, the emitter of the triode Q4 is connected with the emitter of the triode Q5, the collector of the triode Q5 is grounded, and the emitter of the triode Q4 is connected with the control end of the switch tube Q3. 7. The positioning and warning system for a subway vehicle as set forth in claim 2, wherein The second vehicle detection module comprises an infrared transmitting circuit and an infrared receiving circuit; The power supply end of the infrared transmitting circuit and the infrared receiving circuit is connected with the second end of the first switch module, the infrared transmitting circuit is used for transmitting infrared light signals, the infrared receiving circuit is used for receiving the infrared light signals transmitted by the infrared transmitting circuit, and the infrared receiving circuit is connected with the main control module.
8. A positioning warning system for a subway vehicle as defined in claim 7, wherein The second early warning module comprises an operational amplifier U2, a NOT gate U3, a switch tube Q6 and a light emitting diode LED2. The inverting input end of the operational amplifier U2 is connected with a Vref reference voltage, the non-inverting input end of the operational amplifier U2 is connected with the output end of the infrared receiving circuit, the output end of the operational amplifier U2 is connected with the input end of the NOT gate U3, the output end of the NOT gate U3 is connected with the control end of the switch tube Q6, the first end of the switch tube Q6 is connected with a power supply, the second end of the switch tube Q6 is connected with the anode of the light emitting diode LED2, and the cathode of the light emitting diode LED2 is grounded.