CN117401003B - Train parking state early warning system - Google Patents
Train parking state early warning system Download PDFInfo
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- CN117401003B CN117401003B CN202311603851.0A CN202311603851A CN117401003B CN 117401003 B CN117401003 B CN 117401003B CN 202311603851 A CN202311603851 A CN 202311603851A CN 117401003 B CN117401003 B CN 117401003B
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- 238000001514 detection method Methods 0.000 claims abstract description 55
- 238000004891 communication Methods 0.000 claims abstract description 28
- 230000005684 electric field Effects 0.000 claims description 45
- 239000003990 capacitor Substances 0.000 claims description 29
- 238000000034 method Methods 0.000 abstract description 18
- 230000008569 process Effects 0.000 abstract description 14
- 238000010586 diagram Methods 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L27/00—Central railway traffic control systems; Trackside control; Communication systems specially adapted therefor
- B61L27/20—Trackside control of safe travel of vehicle or train, e.g. braking curve calculation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61C—LOCOMOTIVES; MOTOR RAILCARS
- B61C17/00—Arrangement or disposition of parts; Details or accessories not otherwise provided for; Use of control gear and control systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L23/00—Control, warning or like safety means along the route or between vehicles or trains
- B61L23/04—Control, warning or like safety means along the route or between vehicles or trains for monitoring the mechanical state of the route
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L23/00—Control, warning or like safety means along the route or between vehicles or trains
- B61L23/06—Control, warning or like safety means along the route or between vehicles or trains for warning men working on the route
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L27/00—Central railway traffic control systems; Trackside control; Communication systems specially adapted therefor
- B61L27/70—Details of trackside communication
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- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Transportation (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
The invention relates to the technical field of parking early warning and provides a train parking state early warning system which comprises a switch control unit, a ranging unit, a first alarm unit, a second alarm unit, a human body detection unit, a main control unit and a wireless communication unit, wherein the switch control unit is connected with the ranging unit; the switch control unit is arranged on the side of a rail on which the overhauled train runs; the switch control unit is used for being closed when the overhauled train passes through the switch control unit so as to start the ranging unit, the second alarm unit, the human body detection unit, the main control unit and the wireless communication unit; the distance measuring unit is used for detecting the distance from the parking position to the overhauled train; the human body detection unit is used for detecting whether pedestrians are on the rail on which the overhauled train runs; the main control unit sends a second alarm instruction to the second alarm unit according to the detection result of the human body detection unit or the detection result of the ranging unit. Through the technical scheme, the problem that potential safety hazards exist in the train stopping process when the train is overhauled in the related art is solved.
Description
Technical Field
The invention relates to the technical field of parking early warning, in particular to a train parking state early warning system.
Background
In the process of using the railway vehicle, parts are gradually worn, corroded and damaged, and various inspection and repair works must be carried out on the railway vehicle in order to ensure the running safety and prolong the service life of the vehicle in a state that the quality of the vehicle is always good. The railway freight car in China is characterized by large quantity and various types of railway freight cars, and is generally not fixedly attached to a base layer, so that the railway freight car has large fluidity and uneven application conditions. If the truck is not checked and maintained in time, the driving safety is endangered. Some maintenance equipment is fixed to be set up in maintenance parking stall, in order to conveniently overhaul the train, needs the train driver to stop the train in the assigned position accurately. When the train is overhauled, a train driver is required to drive the train to a specified overhauling parking space, the visual field of the train driver is limited in the parking process, and if someone passes through the parking space or the staff stays on the rail, the train driver cannot find out in time, safety accidents are easy to occur, and therefore the problem that potential safety hazards exist in the train parking process when the train is overhauled is caused.
Disclosure of Invention
The invention provides a train parking state early warning system, which solves the problem that potential safety hazards exist in the train parking process when a train is overhauled in the related technology.
The technical scheme of the invention is as follows:
The train parking state early warning system comprises a VCC power supply, a switch control unit, a ranging unit, a first alarm unit, a second alarm unit, a human body detection unit, a main control unit and a wireless communication unit;
The first alarm unit is arranged on a overhauled train, and the second alarm unit, the ranging unit and the human body detection unit are all arranged on a parking space of the overhauled train;
The VCC power supply is used for providing working power supply for the ranging unit, the second alarm unit, the human body detection unit, the main control unit and the wireless communication unit;
The switch control unit is arranged on the side edge of a rail on which the overhauled train runs and is connected in series with a power supply loop formed by the VCC power supply, the ranging unit, the second alarm unit, the human body detection unit, the main control unit and the wireless communication unit so as to control the on-off of the power supply loop;
The switch control unit is used for being closed when the overhauled train passes through the switch control unit so as to start the ranging unit, the second alarm unit, the human body detection unit, the main control unit and the wireless communication unit;
the distance measuring unit is used for detecting the distance from the parking position to the overhauled train;
the human body detection unit is used for detecting whether pedestrians are on the rail on which the overhauled train runs;
the main control unit sends a first alarm instruction to the first alarm unit through the wireless communication unit according to the detection result of the human body detection unit;
The first alarm unit is used for sending an alarm signal to a train driver;
The main control unit sends a second alarm instruction to the second alarm unit according to the detection result of the human body detection unit or the detection result of the ranging unit;
The second alarm unit is used for sending alarm signals to train drivers and sending alarm signals to pedestrians on the rail.
Further, the human body detection unit in the invention comprises an electric field emission circuit and an electric field receiving circuit, wherein the electric field emission circuit and the electric field receiving circuit are both connected with the main control unit, the electric field emission circuit comprises a capacitor C10, a triode Q1, a mutual inductor T1, a triode Q2, a resistor R17, a resistor R18, a triode Q4, a mutual inductor T2 and an emission electrode J1,
The first end of electric capacity C10 is used for connecting signal generator, the second end of electric capacity C10 is connected triode Q1's base, triode Q1's collector is connected the first input of transformer T1, VCC power is connected to triode Q1's second input, triode Q1's projecting pole ground connection, transformer T1's first output is connected triode Q2's base, transformer T1's second output ground connection, triode Q2's collecting electrode passes through resistance R17 connects triode Q4's base, triode Q2's projecting pole ground connection, triode Q4's projecting pole is connected VCC power, triode Q4's projecting pole is passed through resistance R18 is connected triode Q4's base, triode Q4's collecting electrode is connected transformer T2's first input, transformer T2's second input ground connection, triode Q2's first output is connected to the transformer T2.
Further, the electric field receiving circuit in the invention comprises a receiving electrode J2, a capacitor C5, a resistor R7, an operational amplifier U2, a resistor R8, an operational amplifier U3, a resistor R9 and a resistor R10, wherein a first end of the capacitor C5 is connected with the receiving electrode J2, a second end of the capacitor C5 is connected with a non-inverting input end of the operational amplifier U2 through the resistor R7, an output end of the operational amplifier U2 is connected with an inverting input end of the operational amplifier U2, an output end of the operational amplifier U2 is connected with the non-inverting input end of the operational amplifier U3 through the resistor R8, the inverting input end of the operational amplifier U3 is grounded through the resistor R9, an output end of the operational amplifier U3 is connected with the inverting input end of the operational amplifier U3 through the resistor R10, and an output end of the operational amplifier U3 is connected with the first input end of the main control unit.
Further, a filter circuit is further included between the output end of the operational amplifier U3 and the first input end of the main control unit, the filter circuit includes a resistor R11, a capacitor C8, a resistor R12, an operational amplifier U4, a capacitor C9 and a resistor R13, the first end of the resistor R11 is connected to the output end of the operational amplifier U3, the second end of the resistor R11 is grounded through the capacitor C8, the second end of the resistor R11 is connected to the inverting input end of the operational amplifier U4 through the resistor R12, the non-inverting input end of the operational amplifier U4 is grounded, the output end of the operational amplifier U4 is connected to the second end of the resistor R11 through the resistor R13, the output end of the operational amplifier U4 is connected to the inverting input end of the operational amplifier U4 through the capacitor C9, and the output end of the operational amplifier U4 is connected to the first input end of the main control unit.
Further, in the present invention, the second alarm unit includes an optocoupler U5, a resistor R15, a resistor R16, a switching tube Q3, and an alarm BL1, where a first input end of the optocoupler U5 is connected to a VCC power supply, a second input end of the optocoupler U5 is grounded, a first output end of the optocoupler U5 is connected to the VCC power supply through the resistor R15, a second output end of the optocoupler U5 is connected to a control end of the switching tube Q3, a first end of the switching tube Q3 is connected to a first end of the alarm BL1, a second end of the alarm BL1 is connected to the VCC power supply through the resistor R16, and a second end of the switching tube Q3 is grounded.
Further, in the present invention, the switch control unit includes a switch SW1 and a relay K1, where a first end of the switch SW1 is connected to a VCC power supply, a second end of the switch SW1 is connected to a first input end of the relay K1, a second input end of the relay K1 is grounded, a normally open end of the relay K1 is connected to a VCC power supply, and a common end of the relay K1 is used as an output end of the VCC power supply.
The working principle and the beneficial effects of the invention are as follows:
When the train needs to be overhauled, the overhauled train runs to the parking space of the overhauled train under the driving of a train driver, and in the process, if staff passes through or stays on a rail in the process, the danger of casualties is easily brought. In the process, if a person is detected on the rail, the human body detection unit sends the signal to the main control unit in the form of an electric signal, the main control unit sends an alarm instruction to the second alarm unit in a signal mode, then the second alarm unit sends an alarm signal to warn workers on the rail to leave timely, meanwhile, the main control unit sends the signal to the first alarm unit through the wireless communication unit, and the first alarm unit also sends an alarm signal for reminding drivers of overhauled trains of emergency braking trains so as to avoid casualties.
The overhauled train runs to the parking space of the overhauled train under the driving of a train driver, in the process, the distance measuring unit detects the distance from the specified parking position to the head of the overhauled train, after the overhauled train runs to the specified position, the main control unit also sends an alarm instruction to the second alarm unit, the second alarm unit sends a flashing alarm signal, and when the train driver finds the flashing alarm signal, the train is braked, so that the overhauled train is parked at the specified position accurately. The main control unit can send the signal to the first alarm unit through the wireless communication unit, and the first alarm unit simultaneously sends out a flashing alarm signal to remind a train driver to brake the train.
In the invention, when a overhauled train runs to a parking space of the overhauled train under the driving of a train driver, the overhauled train firstly passes through the switch control unit, the switch control unit is arranged on the side edge of a rail where the overhauled train runs, the switch control unit is composed of a switch, when the overhauled train passes through the side edge of the rail where the overhauled train runs, the switch is closed, the power supply ends of the ranging unit, the second alarm unit, the human body detection unit, the main control unit and the wireless communication unit are connected with a VCC power supply, and then the ranging unit, the second alarm unit, the human body detection unit, the main control unit and the wireless communication unit enter into working states, so that the ranging unit, the second alarm unit, the human body detection unit, the main control unit and the wireless communication unit are in continuous working states, and besides the effect of saving electric energy, the potential safety hazard problem existing in the train stopping process can be effectively avoided.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
FIG. 1 is a block diagram of a train stop state early warning system in the present invention;
FIG. 2 is a circuit diagram of an electric field emission circuit according to the present invention;
FIG. 3 is a circuit diagram of an electric field receiving circuit according to the present invention;
FIG. 4 is a circuit diagram of a filter circuit according to the present invention;
FIG. 5 is a circuit diagram of a second alarm unit of the present invention;
fig. 6 is a circuit diagram of a switch control unit in the present invention.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
As shown in fig. 1, the embodiment provides a train parking state early warning system, which comprises a VCC power supply, a switch control unit, a ranging unit, a first alarm unit, a second alarm unit, a human body detection unit, a main control unit, and a wireless communication unit; the first alarm unit is arranged on the overhauled train, and the second alarm unit, the ranging unit and the human body detection unit are all arranged on a parking space of the overhauled train; the VCC power supply is used for providing working power supply for the ranging unit, the second alarm unit, the human body detection unit, the main control unit and the wireless communication unit; the switch control unit is arranged at the side of a rail on which a overhauled train runs and is connected in series with a power supply loop formed by the VCC power supply, the ranging unit, the second alarm unit, the human body detection unit, the main control unit and the wireless communication unit so as to control the on-off of the power supply loop; the switch control unit is used for being closed when the overhauled train passes through the switch control unit so as to start the ranging unit, the second alarm unit, the human body detection unit, the main control unit and the wireless communication unit; the distance measuring unit is used for detecting the distance from the parking position to the overhauled train; the human body detection unit is used for detecting whether pedestrians are on the rail on which the overhauled train runs; the main control unit sends a first alarm instruction to the first alarm unit through the wireless communication unit according to the detection result of the human body detection unit; the first alarm unit is used for sending an alarm signal to a train driver; the main control unit sends a second alarm instruction to the second alarm unit according to the detection result of the human body detection unit or the detection result of the ranging unit; the second alarm unit is used for sending alarm signals to train drivers and pedestrians on the rails.
In this embodiment, when the train needs to be overhauled, the overhauled train is driven to the parking stall of the overhauled train under the driving of train driver, if have the staff to walk on the rail or stay in this in-process and bring the danger of casualties very easily, therefore, this embodiment has set up human body detecting element on the parking stall of the overhauled train, when the overhauled train is driven to the parking stall of the overhauled train, human body detecting element can send even electric field signal, at this moment, have the staff in this even electric field, or have the staff to pass this even electric field when, the peculiar electric field of human body can cause the interference to this electric field homogeneity, human body detecting element just can judge that someone passes through this disturbance signal. In the process, if a person is detected on the rail, the human body detection unit sends the signal to the main control unit in the form of an electric signal, the main control unit sends an alarm instruction to the second alarm unit, then the second alarm unit sends an alarm signal to warn a worker on the rail to leave in time, and meanwhile, the main control unit sends the signal to the first alarm unit through the wireless communication unit, and the first alarm unit also sends an alarm signal for reminding a driver of a overhauled train of emergency braking the train so as to avoid casualties.
The overhauled train runs to the parking space of the overhauled train under the driving of a train driver, in the process, the distance measuring unit detects the distance from the specified parking position to the head of the overhauled train, after the overhauled train runs to the specified position, the main control unit also sends an alarm instruction to the second alarm unit, the second alarm unit sends a flashing alarm signal, and when the train driver finds the flashing alarm signal, the train is braked, so that the overhauled train is parked at the specified position accurately. The main control unit can send the signal to the first alarm unit through the wireless communication unit, and the first alarm unit simultaneously sends out a flashing alarm signal to remind a train driver to brake the train.
In this embodiment, when the in-process that is driven by the train driver to the parking stall of being overhauld the train, can pass through switch control unit at first, switch control unit sets up in the rail side of being overhauld the train and travel, switch control unit comprises the switch, when the rail side of being overhauld the train and travel is passed through to the train, the switch is closed, the VCC power is connected to the power supply end of range finding unit, the second alarm unit, human body detecting element, master control unit and wireless communication unit, then range finding unit, the second alarm unit, human body detecting element, master control unit and wireless communication unit enter into operating condition, avoid range finding unit, the second alarm unit, human body detecting element, master control unit and wireless communication unit are in the state of lasting work, can practice thrift the electric energy like this, the potential safety hazard problem that the in-process of stopping of train exists is effectively avoided simultaneously.
As shown in fig. 2, the human body detection unit in this embodiment includes an electric field emission circuit and an electric field receiving circuit, the electric field emission circuit and the electric field receiving circuit are all connected with the main control unit, the electric field emission circuit includes a capacitor C10, a triode Q1, a transformer T1, a triode Q2, a resistor R17, a resistor R18, a triode Q4, a transformer T2 and an emitter electrode J1, the first end of the capacitor C10 is used for connecting a signal generator, the second end of the capacitor C10 is connected with the base electrode of the triode Q1, the collector electrode of the triode Q1 is connected with the first input end of the transformer T1, the second input end of the transformer T1 is connected with a VCC power supply, the emitter electrode of the triode Q1 is grounded, the first output end of the transformer T1 is connected with the base electrode of the triode Q2, the second output end of the transformer T1 is grounded, the collector electrode of the triode Q2 is connected with the base electrode of the triode Q4 through a resistor R17, the emitter electrode of the triode Q4 is grounded, the emitter electrode of the triode Q4 is connected with the VCC power supply, the emitter electrode of the transformer T4 is connected with the second input end of the transformer T2, and the second input end of the transformer T2 is grounded.
In this embodiment, the electric field emission circuit is used for transmitting stable electric field signal, the electric field emission circuit is used for receiving electric field signal, and turn into corresponding signal transmission to the master control unit with the electric field signal received, at the in-process that the train that is overhauld was gone into the parking stall, if human detection unit detects that someone is on the rail, the master control unit can send alarm signal to the second alarm unit, be used for reminding the pedestrian on the rail to leave in time, simultaneously the master control unit sends this signal to first alarm unit with the help of wireless communication unit, first alarm unit sends alarm signal, be used for reminding the train navigating mate in place ahead rail to have the pedestrian, train navigating mate should emergency braking by overhauling the train after receiving this alarm signal, in order to avoid causing the casualties.
Specifically, the working principle of the electric field emission circuit is as follows: when the transformer T1 works, the signal generator outputs a square wave signal, the direct current component is removed through the capacitor C10, the square wave signal is added to the base electrode of the triode Q1, the triode Q1 is conducted when the square wave signal is in a high level, a voltage signal is generated in the input coil of the transformer T1, at this time, an induced voltage is generated on the output coil of the transformer T1, when the square wave signal is in a low level, the triode Q1 is cut off, an electric signal in the input coil of the transformer T1 disappears, and therefore the induced voltage in the output coil of the transformer T1 disappears. Under the action of square wave signals, a pulse voltage signal is generated on an output coil of the transformer T1, the triode Q2 is driven, and the triode Q1 forms an amplifying circuit and is used for driving capability of an electric signal.
When an induced voltage exists on an output coil of the transformer T1, the triode Q2 is conducted, at the moment, the resistor R18 and the resistor R17 are divided, the emitter voltage of the triode Q4 is larger than the base voltage of the triode Q4, the triode Q4 is conducted, the VCC power supply is added to an input coil of the transformer T2 after passing through the triode Q4, then the output coil of the transformer T2 generates an induced voltage to drive the transmitting electrode J1, and at the moment, the transmitting electrode J1 generates an electric field signal. When no induced voltage is generated on the output coil of the transformer T1, the triode Q2 is cut off, the triode Q4 is also cut off, the output coil of the transformer T2 does not generate induced voltage any more, the transmitting electrode J1 does not generate an electric field signal any more, and when the induced voltage is generated on the output coil of the transformer T1 again, the transmitting electrode J1 generates an electric field signal any more, so that circulation is formed.
When the VCC power supply works, the VCC power supply may have unstable conditions, so that an electric field generated by the emitter electrode J1 is unstable, for this reason, the triode Q2 and the triode Q4 form a constant current source, when the VCC power supply is enlarged, the voltage division on the resistor R17 is enlarged, the collector current of the triode Q2 is enlarged, so that the base current of the triode Q4 is enlarged, therefore, the collector current of the triode Q4 is reduced, when the VCC power supply is reduced, the voltage division on the resistor R17 is reduced, the collector current of the triode Q2 is reduced, so that the base current of the triode Q4 is reduced, therefore, the collector current of the triode Q4 is enlarged, the working current of the transformer T2 is restrained from changing, thereby ensuring that the intensity of an electric field signal generated by the emitter electrode J1 is stable and unchanged, improving the stability of the electric field, further improving the reliability of human body detection, and avoiding the condition of missed detection or false detection of a human body detection unit.
As shown in fig. 3, the electric field receiving circuit in this embodiment includes a receiving electrode J2, a capacitor C5, a resistor R7, an operational amplifier U2, a resistor R8, an operational amplifier U3, a resistor R9 and a resistor R10, where a first end of the capacitor C5 is connected to the receiving electrode J2, a second end of the capacitor C5 is connected to a non-inverting input end of the operational amplifier U2 through the resistor R7, an output end of the operational amplifier U2 is connected to a non-inverting input end of the operational amplifier U2, an output end of the operational amplifier U2 is connected to a non-inverting input end of the operational amplifier U3 through the resistor R8, a non-inverting input end of the operational amplifier U3 is grounded through the resistor R9, and an output end of the operational amplifier U3 is connected to a non-inverting input end of the operational amplifier U3 through the resistor R10, and an output end of the operational amplifier U3 is connected to a first input end of the main control unit.
When someone appears in the electric field, the stability of the electric field is disturbed, and the electric field receiving circuit is used for receiving the disturbed electric field signal and converting the received electric field signal into an electric signal to be sent to the main control unit.
The electric field receiving circuit receives the weak electric field signal received by the electrode J2, and the main control unit cannot effectively identify the electric field signal, so that the operational amplifier U3 forms an amplifying circuit, wherein the operational amplifier U2 forms a follower for improving the effectiveness of signal transmission, reducing the loss of the signal on a line, and finally sending the amplified electric signal to the main control unit.
As shown in fig. 4, in this embodiment, a filter circuit is further included between the output end of the op-amp U3 and the first input end of the main control unit, where the filter circuit includes a resistor R11, a capacitor C8, a resistor R12, an op-amp U4, a capacitor C9 and a resistor R13, the first end of the resistor R11 is connected to the output end of the op-amp U3, the second end of the resistor R11 is grounded through the capacitor C8, the second end of the resistor R11 is connected to the inverting input end of the op-amp U4 through the resistor R12, the non-inverting input end of the op-amp U4 is grounded, the output end of the op-amp U4 is connected to the second end of the resistor R11 through the resistor R13, and the output end of the op-amp U4 is connected to the inverting input end of the op-amp U4 through the capacitor C9.
The working environment where the train overhauls is complex, a large number of interference signals exist in the electric signals output by the receiving electrode J2, and the final detection result can be seriously influenced by the interference signals, so in the embodiment, a filter circuit is added between the output end of the operational amplifier U3 and the first input end of the main control unit, and the filter circuit is composed of a resistor R11, a capacitor C8, a resistor R12, the operational amplifier U4, a capacitor C9 and a resistor R13 and is used for filtering high-frequency interference signals in the signals and finally sending the filtered electric signals to the main control unit.
As shown in fig. 5, in this embodiment, the second alarm unit includes an optocoupler U5, a resistor R15, a resistor R16, a switching tube Q3, and an alarm BL1, where a first input end of the optocoupler U5 is connected to a VCC power supply, a second input end of the optocoupler U5 is grounded, a first output end of the optocoupler U5 is connected to the VCC power supply through the resistor R15, a second output end of the optocoupler U5 is connected to a control end of the switching tube Q3, a first end of the switching tube Q3 is connected to a first end of the alarm BL1, a second end of the alarm BL1 is connected to the VCC power supply through the resistor R16, and a second end of the switching tube Q3 is grounded.
In this embodiment, in the process that the overhauled train enters the parking space, if the human body detection unit detects that someone is on the rail, the main control unit can send alarm signal to the second alarm unit for remind the pedestrian on the rail to leave in time.
In the process that the overhauled train enters the parking space, if the human body detection unit detects that a person is on a rail, the first output end of the main control unit outputs a high-level signal to the first input end of the optical coupler U5, the optical coupler U5 is conducted, the optical coupler U5 outputs a high level, the switch tube Q3 is conducted, at the moment, the alarm BL1 is connected with the VCC power supply, and an alarm signal is sent out. When no pedestrian is on the rail, the first output end of the main control unit outputs a low level, the optocoupler U5 is cut off, the switching tube Q3 is also cut off, and the alarm BL1 does not alarm.
As shown in fig. 6, the switch control unit in this embodiment includes a switch SW1 and a relay K1, where a first end of the switch SW1 is connected to the VCC power supply, a second end of the switch SW1 is connected to a first input end of the relay K1, a second input end of the relay K1 is grounded, a normally open end of the relay K1 is connected to the VCC power supply, and a common end of the relay K1 is used as an output end of the VCC power supply.
In this embodiment, the switch SW1 is disposed at the inner side of the rail, when the overhauled train travels to the overhauled parking space, the wheels of the overhauled train will press the switch SW1, at this time, the switch SW1 is closed, at this time, the relay K1 is electrically attracted, the public end of the relay K1 is connected with the normally open end of the relay K1, and the public end of the relay K1 is used as a power supply end to provide working power for each unit.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (5)
1. The train parking state early warning system is characterized by comprising a VCC power supply, a switch control unit, a ranging unit, a first alarm unit, a second alarm unit, a human body detection unit, a main control unit and a wireless communication unit;
The first alarm unit is arranged on a overhauled train, and the second alarm unit, the ranging unit and the human body detection unit are all arranged on a parking space of the overhauled train;
The VCC power supply is used for providing working power supply for the ranging unit, the second alarm unit, the human body detection unit, the main control unit and the wireless communication unit;
The switch control unit is arranged on the side edge of a rail on which the overhauled train runs and is connected in series with a power supply loop formed by the VCC power supply, the ranging unit, the second alarm unit, the human body detection unit, the main control unit and the wireless communication unit so as to control the on-off of the power supply loop;
The switch control unit is used for being closed when the overhauled train passes through the switch control unit so as to start the ranging unit, the second alarm unit, the human body detection unit, the main control unit and the wireless communication unit;
the distance measuring unit is used for detecting the distance from the parking position to the overhauled train;
the human body detection unit is used for detecting whether pedestrians are on the rail on which the overhauled train runs;
the main control unit sends a first alarm instruction to the first alarm unit through the wireless communication unit according to the detection result of the human body detection unit;
The first alarm unit is used for sending an alarm signal to a train driver;
The main control unit sends a second alarm instruction to the second alarm unit according to the detection result of the human body detection unit or the detection result of the ranging unit;
the second alarm unit is used for sending alarm signals to train drivers and sending alarm signals to pedestrians on the rail;
The human body detection unit comprises an electric field emission circuit and an electric field receiving circuit, both the electric field emission circuit and the electric field receiving circuit are connected with the main control unit, the electric field emission circuit comprises a capacitor C10, a triode Q1, a mutual inductor T1, a triode Q2, a resistor R17, a resistor R18, a triode Q4, a mutual inductor T2 and an emission electrode J1,
The first end of electric capacity C10 is used for connecting signal generator, the second end of electric capacity C10 is connected triode Q1's base, triode Q1's collector is connected the first input of transformer T1, VCC power is connected to triode Q1's second input, triode Q1's projecting pole ground connection, transformer T1's first output is connected triode Q2's base, transformer T1's second output ground connection, triode Q2's collecting electrode passes through resistance R17 connects triode Q4's base, triode Q2's projecting pole ground connection, triode Q4's projecting pole is connected VCC power, triode Q4's projecting pole is passed through resistance R18 is connected triode Q4's base, triode Q4's collecting electrode is connected transformer T2's first input, transformer T2's second input ground connection, triode Q2's first output is connected to the transformer T2.
2. The train parking state early warning system according to claim 1, wherein the electric field receiving circuit comprises a receiving electrode J2, a capacitor C5, a resistor R7, an operational amplifier U2, a resistor R8, an operational amplifier U3, a resistor R9 and a resistor R10, a first end of the capacitor C5 is connected with the receiving electrode J2, a second end of the capacitor C5 is connected with a non-inverting input end of the operational amplifier U2 through the resistor R7, an output end of the operational amplifier U2 is connected with an inverting input end of the operational amplifier U2, an output end of the operational amplifier U2 is connected with a non-inverting input end of the operational amplifier U3 through the resistor R8, an inverting input end of the operational amplifier U3 is grounded through the resistor R9, an output end of the operational amplifier U3 is connected with an inverting input end of the operational amplifier U3 through the resistor R10, and an output end of the operational amplifier U3 is connected with a first input end of the main control unit.
3. The train parking state early warning system according to claim 2, wherein a filter circuit is further included between the output end of the operational amplifier U3 and the first input end of the main control unit, the filter circuit includes a resistor R11, a capacitor C8, a resistor R12, an operational amplifier U4, a capacitor C9 and a resistor R13, the first end of the resistor R11 is connected to the output end of the operational amplifier U3, the second end of the resistor R11 is grounded through the capacitor C8, the second end of the resistor R11 is connected to the inverting input end of the operational amplifier U4 through the resistor R12, the non-inverting input end of the operational amplifier U4 is grounded, the output end of the operational amplifier U4 is connected to the second end of the resistor R11 through the resistor R13, the output end of the operational amplifier U4 is connected to the inverting input end of the operational amplifier U4 through the capacitor C9, and the output end of the operational amplifier U4 is connected to the first input end of the main control unit.
4. The train parking state early warning system according to claim 1, wherein the second warning unit comprises an optocoupler U5, a resistor R15, a resistor R16, a switching tube Q3 and a warning device BL1, a first input end of the optocoupler U5 is connected with a VCC power supply, a second input end of the optocoupler U5 is grounded, a first output end of the optocoupler U5 is connected with the VCC power supply through the resistor R15, a second output end of the optocoupler U5 is connected with a control end of the switching tube Q3, a first end of the switching tube Q3 is connected with a first end of the warning device BL1, a second end of the warning device BL1 is connected with the VCC power supply through the resistor R16, and a second end of the switching tube Q3 is grounded.
5. The train stopping state early warning system according to claim 1, wherein the switch control unit comprises a switch SW1 and a relay K1, a first end of the switch SW1 is connected with a VCC power supply, a second end of the switch SW1 is connected with a first input end of the relay K1, a second input end of the relay K1 is grounded, a normally open end of the relay K1 is connected with the VCC power supply, and a common end of the relay K1 is used as an output end of the VCC power supply.
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| CN202311603851.0A CN117401003B (en) | 2023-11-28 | 2023-11-28 | Train parking state early warning system |
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| CN202311603851.0A CN117401003B (en) | 2023-11-28 | 2023-11-28 | Train parking state early warning system |
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| CN110040159A (en) * | 2018-01-16 | 2019-07-23 | 比亚迪股份有限公司 | Control method for stopping, device and the control equipment of train |
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| KR20040027754A (en) * | 2004-02-25 | 2004-04-01 | 김경준 | Device for shortening stopping distance of train |
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