CN216527286U - ETC special lane early warning system - Google Patents
ETC special lane early warning system Download PDFInfo
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- CN216527286U CN216527286U CN202120815373.XU CN202120815373U CN216527286U CN 216527286 U CN216527286 U CN 216527286U CN 202120815373 U CN202120815373 U CN 202120815373U CN 216527286 U CN216527286 U CN 216527286U
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Abstract
The ETC special lane early warning system comprises a geomagnetic vehicle sensor, a shell, a switch, a personnel passing display screen, a vehicle passing display screen, an LED display module and a loudspeaker, wherein a microcontroller, a power supply module, a switch circuit, a voice broadcasting module and a display driving circuit are arranged in the shell; the switch is connected with a switch circuit, and the switch circuit is connected with the signal input end of the microcontroller; the geomagnetic vehicle sensor transmits acquired information to the microcontroller, the microcontroller outputs signals to the voice broadcasting module and the display driving circuit respectively, and the display driving module drives the personnel passing display screen, the vehicle passing display screen and the LED display module to work. The system improves the personal safety of the highway staff, and is provided with the anti-interference device, so that the stability is high; the expansion port is arranged, functions can be expanded according to needs, in addition, signal transmission modes of the system are various, and the system is greatly convenient for transmitting the information of the highway to the outside.
Description
Technical Field
The utility model belongs to the technical field of highway ETC auxiliary equipment, and particularly relates to a special lane early warning system for ETC.
Background
Electronic Toll Collection (ETC) system has effectively solved the traffic jam problem of toll station as highway innovation charging mode, the important measure of promoting the information-based level, provides convenient, swift, comfortable trip to experience for vast ETC customer. Meanwhile, vehicles passing through the ETC lane do not need to be stopped, the vehicle speed is high generally, and certain potential safety hazards are brought to field workers. In order to improve the safety of the staff in the toll station, an ETC lane early warning system is introduced at present.
Prior patent applications, publication numbers are: CN210639655U, provides a safety prompting system for an ETC lane of a highway toll station, and the patent application can send out acousto-optic prompt when a vehicle approaches the toll station, so as to prevent workers from entering a channel by mistake and ensure the safety of the workers; if no vehicle is passing, it is displayed that a person may pass through the passage, and the person may pass through the passage within a prescribed time.
However, the application only gives a general idea, and in the implementation, the system stability is very easily influenced by the outside world and is not high; in addition, according to the scheme disclosed in the prior art, no way is available for later-stage function expansion, for example, in the use process, a port is required to be added, so that vehicle information is transmitted to a client, or external information is additionally collected, the function of the system is further increased, and no way is available, so that a more stable ETC special lane early warning system is provided.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide the ETC special lane early warning system which is simple in structure and good in using effect.
In order to solve the technical problems, the utility model provides the following technical scheme: the ETC special lane early warning system comprises a geomagnetic vehicle sensor, a shell, a switch, a personnel passing display screen, a vehicle passing display screen, an LED display module and a loudspeaker, wherein the shell is provided with a standby input interface and a standby output interface;
a microcontroller, a power supply module, a switch circuit, a voice broadcasting module and a display driving circuit are arranged in the shell;
the power supply module supplies power to the system;
the switch is connected with a switch circuit, and the switch circuit is connected with the signal input end of the microcontroller;
the geomagnetic vehicle sensor transmits acquired information to the microcontroller, the microcontroller outputs signals to the voice broadcasting module and the display driving circuit respectively, the voice broadcasting module drives the loudspeaker to work, and the display driving module drives the personnel passing display screen, the vehicle passing display screen and the LED display module to work.
The switch comprises an initial switch and a safety island switch, the initial switch is positioned at two ends of the personnel channel, and the safety island switch is positioned in the middle of the personnel channel; the initial switch and the safety island switch are respectively connected with the signal input end of the microcontroller through a switch circuit.
The switch circuit comprises a first voltage-dividing resistor, a second voltage-dividing resistor, a first light-emitting diode, a first optical coupler, a first protection diode, a first grounding resistor, a second grounding resistor, a third grounding resistor and a first filter capacitor;
the switch is connected with the anode of the first light-emitting diode through a first divider resistor, the cathode of the first light-emitting diode is connected with the input end of a first optical coupler, the output end of the first optical coupler is connected with the switching signal input end of the microcontroller through a second divider resistor, and the switching signal input end of the microcontroller is grounded through a third grounding resistor;
the anode of the first light-emitting diode is also connected with the cathode of the first protection diode, the anode of the first protection diode is grounded through a second grounding resistor, and the anode of the first light-emitting diode is also connected with a parallel circuit of a first grounding resistor and a first filter capacitor.
The signal output end of the geomagnetic vehicle sensor is connected with an input circuit, the structure of the input circuit is the same as that of the switch circuit, and the input circuit is connected with the signal input end of the microcontroller.
The display driving module comprises a personnel passing display screen driving circuit, a vehicle passing display screen driving circuit and an LED display lamp driving circuit;
the LED display module comprises at least three LED display lamps, and the signal output end of the microcontroller is connected with the LED display lamp driving circuit;
the LED display lamp driving circuit comprises a sixth voltage-dividing resistor, a second optocoupler, a third protection diode, a seventh voltage-dividing resistor, a second light-emitting diode, a relay and a third filter capacitor;
the signal output end of the microcontroller is connected with the input end of the second optocoupler through a sixth voltage-dividing resistor;
one end of the output end of the second optocoupler is connected with the anode of a third protection diode, the cathode of the third protection diode is connected with the anode of a second light-emitting diode through a seventh divider resistor, and the cathode of the second light-emitting diode is connected with a coil of the relay;
the direct current power supply is connected with the anode of the second light-emitting diode through a seventh divider resistor, and the cathode of the second light-emitting diode is connected with the coil of the relay;
the direct current power supply is connected with the LED lamp through a normally open contact of the relay, and the other end of the LED lamp is grounded;
the direct current power supply is also grounded through a third filter capacitor;
the direct current power supply is further connected with the negative electrode of a third protection diode, the positive electrode of the third protection diode is connected with the first output end of the second optocoupler, and the second output end of the second optocoupler is grounded.
The personnel passing display screen driving circuit and the vehicle passing display screen driving circuit both comprise serial communication modules, and the microcontroller is in serial communication with the personnel communication display screen and the vehicle communication display screen through the serial communication modules.
The standby input interface is connected with a standby input circuit, and the signal output end of the standby input circuit is connected with the signal input end of the microcontroller;
the standby input circuit comprises a second protection diode, a second filter capacitor, a fourth grounding resistor, an operational amplifier, a third voltage dividing resistor, a fourth voltage dividing resistor and a fifth voltage dividing resistor;
the power supply end of the standby input interface is connected with a direct-current power supply, the signal output end of the standby input interface is connected with the non-inverting input end of the operational amplifier sequentially through the third voltage dividing resistor and the fourth voltage dividing resistor, the inverting input end of the operational amplifier is connected with the output end of the operational amplifier, and the output end of the operational amplifier is connected with the signal input end of the microcontroller through the fifth voltage dividing resistor;
the signal output end of the standby input interface is also connected with the cathode of a second protection diode, and the anode of the second protection diode is grounded;
a second filter capacitor is connected in parallel to the second protection diode;
the fourth grounding resistor is connected between the third voltage dividing resistor and the fourth voltage dividing resistor.
The standby output interface is connected with a standby output circuit, the signal input end of the standby output circuit is connected with the signal output end of the microcontroller, and the standby output circuit is the same as the LED display lamp driving circuit in structure.
The CAN communication pin of the microcontroller is connected with a CAN communication module, and the microcontroller communicates through the CAN communication module.
The microcontroller is connected with an Ethernet module, and the Ethernet module is connected with an Ethernet transformer.
Through the technical scheme, the utility model has the beneficial effects that:
1. the system can lead the working personnel to press the corresponding switch as required, and the system can indicate whether the communication is available according to the situation, thereby improving the personal safety of the working personnel on the highway;
2. in addition, the system is provided with an anti-interference device, such as an optical coupler and a protective diode, so that the stability is high;
3. the system is provided with expansion ports, such as a standby input interface and a standby output interface, which can expand functions as required;
4. the system has various signal transmission modes, CAN transmit signals through a CAN bus and transmit signals through a local area network, and greatly facilitates the process of transmitting information of the highway to the outside.
Drawings
FIG. 1 is a schematic circuit diagram of embodiment 1;
FIG. 2 is a schematic diagram of a 12V power supply circuit;
FIG. 3 is a schematic diagram of a 5V power supply circuit;
FIG. 4 is a schematic diagram of a 3.3V power supply circuit;
FIG. 5 is a schematic diagram of a 1.8V power supply circuit;
FIG. 6 is a schematic diagram of a switching circuit;
FIG. 7 is a schematic diagram of a standby input circuit;
FIG. 8 is a schematic diagram of a circuit for driving an LED display lamp;
FIG. 9 is a schematic diagram of an Ethernet module circuit;
FIG. 10 is a schematic diagram of a driving circuit of a man passing display screen and a driving circuit of a vehicle passing display screen;
FIG. 11 is a schematic structural view of example 2;
FIG. 12 is a schematic structural view of a door body according to embodiment 2.
Detailed Description
The casing is the cuboid structure, and the casing is inside to be hollow structure. A microcontroller, a power module, a switch circuit, a voice broadcast module and a display driving circuit are arranged in the shell. Meanwhile, a standby input interface and a standby output interface are connected to the shell.
The switch is connected with a switch circuit, and the switch circuit is connected with the signal input end of the microcontroller; the geomagnetic vehicle sensor transmits the acquired information to the microcontroller, the microcontroller respectively outputs signals to the voice broadcasting module and the display driving module, the voice broadcasting module drives the loudspeaker to work, and the display driving module drives the personnel passing display screen, the vehicle passing display screen and the LED display module to work; the shell is also connected with a standby input interface and a standby output interface.
Microcontroller includes the singlechip (the model is STM32F103 RXT), is connected with reset circuit and clock circuit on the singlechip, and reset circuit and clock circuit are the minimum system of singlechip, and this embodiment is no longer repeated.
Wherein, the power module supplies power for the system. In this embodiment, the power module includes a 12V power circuit, a 5V power circuit, a 3.3V power circuit, and a 1.8V power circuit, so as to provide direct currents of different voltages for the system as required.
As shown in FIGS. 2-5, the 12V power circuit includes a first power protection diode D1, a second power protection diode D2, a first power electrolytic capacitor C1 and a first power filter capacitor C2.
A forward output end (pin 1) of the direct current terminal J1 is connected with the anode of the first power supply protection diode D1, and the cathode of the first power supply protection diode D1 outputs 12V direct current; meanwhile, the cathode of the first power protection diode D1 is connected to the cathode of the second power protection diode D2, and the anode of the second power protection diode D2 is grounded; the negative electrode of the first power supply protection diode D1 is also connected with the positive plate of the first power supply electrolytic capacitor C1, and the negative plate of the first power supply electrolytic capacitor C1 is grounded; the cathode of the first power protection diode D1 is also connected to ground through a first power filter capacitor C2.
The 12V power supply circuit can reduce the high-voltage direct current output by the direct current terminal J1, and output 12V direct current for the equipment to work.
The 5V power supply circuit comprises a second power supply electrolytic capacitor C14, a second power supply filter capacitor C15, a third power supply filter capacitor C16, a buck conversion chip U8 (model number is TPS5430 DDAR), a first power supply capacitor C21, a voltage regulator tube D8 and a sixth filter capacitor.
The output end of the 12V power supply circuit is connected to the signal input end (pin VIN) of the buck conversion chip U8, and meanwhile, the signal input end of the buck conversion chip U8 is also connected to a parallel circuit of a second power supply electrolytic capacitor C14, a second power supply filter capacitor C15 and a third power supply filter capacitor C16.
An alternating current signal output end (pin BOOT) of the voltage reduction conversion chip U8 is connected with a first power supply capacitor C21, a signal output end (pin PH) of the voltage reduction conversion chip U8 is connected with the negative electrode of a voltage regulator tube D8, and the positive electrode of the voltage regulator tube D8 is grounded; meanwhile, the signal output end of the buck conversion chip U8 is also connected with a first power supply resistor R13, and the second end of the first power supply resistor R13 outputs 5V direct current. The second end of the first power supply resistor R13 is also connected with a third power supply electrolytic capacitor C17, a fourth power supply electrolytic capacitor C18 and a fifth power supply electrolytic capacitor C19, and the third power supply electrolytic capacitor C17, the fourth power supply electrolytic capacitor C18 and the fifth power supply electrolytic capacitor C19 are all grounded.
Meanwhile, the second terminal of the first power resistor R13 is also connected to ground through a fourth power filter capacitor C20.
In addition, the second end of the first power supply resistor R13 is also grounded through the second power supply resistor R14 and the third power supply resistor R15 which are connected in series.
By this form, the stability of the 5V power supply circuit is improved, and at the same time, the output current is easy to control.
The 3.3V power circuit comprises a sixth power electrolytic capacitor C3, a fifth power filter capacitor C4, a first voltage stabilizing chip U1 (model number AMS 1117-3.3), a seventh power filter capacitor C5 and a seventh power electrolytic capacitor C6.
The signal output end of the 5V power supply circuit is connected with the positive plate of a sixth power supply electrolytic capacitor C3, the negative plate of the sixth power supply electrolytic capacitor C3 is grounded, and a sixth power supply electrolytic capacitor C3 is connected with a seventh filter capacitor in parallel; the signal output end of the 5V power supply circuit is connected with the signal input end (pin IN) of the first voltage stabilizing chip U1, and the first signal output end of the first voltage stabilizing chip U1 outputs a 3.3V power supply; in addition, a second signal output end of the first voltage stabilization chip U1 is connected with a first signal output end of the first voltage stabilization chip U1, and a second signal output end of a first signal output end of the first voltage stabilization chip U1 is further connected with a parallel circuit of a seventh power supply filter capacitor C5 and a seventh power supply electrolytic capacitor C6.
The 1.8V power supply circuit comprises an eighth power supply filter capacitor C7, a ninth power supply filter capacitor C8, a tenth power supply filter capacitor C9, an eleventh power supply filter capacitor C10 and a second voltage stabilization chip U2 (model is AMS 1117-1.8), a signal output end of the 5V power supply circuit is connected with a signal input end (pin IN) of the second voltage stabilization chip U2, meanwhile, a parallel circuit of the eighth power supply filter capacitor C7 and the ninth power supply filter capacitor C8 is further connected to a signal input end of the second voltage stabilization chip U2, and the eighth power supply filter capacitor C7 and the ninth power supply filter capacitor C8 are grounded after being connected IN parallel. The first signal output end (pin OUT 4) of the second voltage stabilization chip U2 outputs 1.8V direct current; the second signal output end (pin OUT 2) of the second voltage stabilization chip U2 is connected to the first signal output end of the second voltage stabilization chip U2, and meanwhile, the second signal output end of the second voltage stabilization chip U2 is also connected to ground through a tenth power supply filter capacitor C9 and an eleventh power supply filter capacitor C10 which are connected in parallel.
Different direct currents can be provided for the whole system through the 12V power circuit, the 5V power circuit, the 3.3V power circuit and the 1.8V power circuit, so that different requirements of the system can be met, normal operation of the system is guaranteed, and later-stage expansion functions of the system are facilitated.
The switch comprises an initial switch and a safety island switch, the initial switch is positioned at two ends of the personnel channel, and the safety island switch is positioned in the middle of the personnel channel; the initial switch and the safety island switch are respectively connected with the signal input end of the singlechip through a switch circuit.
As shown in fig. 6, the switch circuit includes a first voltage-dividing resistor R1, a second voltage-dividing resistor R3, a first light-emitting diode D4, a first optocoupler U3, a first protection diode D3, a first ground resistor R2, a second ground resistor R4, a third ground resistor R5, and a first filter capacitor C11.
The first voltage dividing resistor R1 is connected with the anode of the first light emitting diode D4, the cathode of the first light emitting diode D4 is connected with the input end of the first optical coupler U3, the output end of the first optical coupler U3 is connected with the switching signal input end of the single chip microcomputer through the second voltage dividing resistor R3, and the switching signal input end of the single chip microcomputer is grounded through the third grounding resistor R5; the anode of the first light-emitting diode D4 is connected to the cathode of the first protection diode D3, the anode of the first protection diode D3 is grounded through a second ground resistor R4, the anode of the first light-emitting diode D4 is further connected to a parallel circuit of a first ground resistor R2 and a first filter capacitor C11, and the parallel circuit of the first ground resistor R2 and the first filter capacitor C11 is grounded through a second ground resistor R4.
The staff presses the switch, and switching circuit transmits this switching signal to the singlechip, and the singlechip compares with other signals according to the switching signal that receives, sees whether the information that the output personnel can communicate.
The switching signal can be protected by arranging the first optical coupler U3, and the external signal is prevented from interfering the signal. Because this scheme is used in the highway, the car is to the car, and the signal is also more complicated, if do not do the protection, if discover to appear the signal very easily and be disturbed in the actual implementation, cause the not high condition of system stability.
The signal output end of the geomagnetic vehicle sensor is connected with an input circuit, the structure of the input circuit is the same as that of the switch circuit, and the input circuit is connected with the signal input end of the single chip microcomputer.
The geomagnetic vehicle sensor collects vehicle information and transmits the collected vehicle information to the single chip microcomputer, and the single chip microcomputer judges whether vehicles enter an ETC channel or not.
The geomagnetic vehicle sensor is mature in the prior art, and the embodiment is only connected with the existing geomagnetic vehicle sensor and does not relate to improvement of specific structures of the geomagnetic vehicle sensor.
The LED display module comprises at least three LED display lamps, the signal output end of the single chip microcomputer is connected with an LED display lamp driving circuit, and the LED display lamp driving circuit drives the LED display lamps to work.
As shown in fig. 8, the LED display lamp driving circuit includes a sixth voltage-dividing resistor R10, a second optocoupler U5, a third protection diode D6, a seventh voltage-dividing resistor R11, a second light-emitting diode D7, a relay, and a third filter capacitor C13; the positive pole of third protection diode D6 is connected to second opto-coupler U5's output end one end, the negative pole of third protection diode D6 passes through seventh divider resistance R11 and connects the positive pole of second emitting diode D7, the coil K1 of relay is connected to second emitting diode D7's negative pole, avoid the inrush current to influence the coil K1 of second opto-coupler U5 and relay through setting up third protection diode D6, guarantee the stability of system work.
The direct current power supply is connected with the anode of the second light emitting diode D7 through a seventh voltage dividing resistor R11, and the cathode of the second light emitting diode D7 is connected with a coil K1 of a relay of the relay, so that when the LED display works, the second light emitting diode D7 emits light to display.
The direct current power supply is connected with the LED display through a normally open contact of the relay, and the other end of the LED display is grounded.
The direct current power supply is grounded through a third filter capacitor C13, so that harmonic waves are filtered out, and the harmonic waves are prevented from affecting the work of the LED display.
The direct-current power supply is also connected with the negative electrode of the third protection diode, the positive electrode of the third protection diode D6 is connected with the first output end of the second optocoupler U5, and the second output end of the second optocoupler U5 is grounded;
the signal output end of the single chip microcomputer is connected with the input end of the second optocoupler U5 through a sixth voltage-dividing resistor R10.
The signal output part of singlechip is connected with VOICE broadcast MODULE (the model is VOICE-MODULE), and the signal input part (the pin is SCL) of VOICE broadcast MODULE connects the signal output part of singlechip, and the signal output part (pin SPK +, SPK-) of VOICE broadcast MODULE connects loudspeaker.
Singlechip output signal arrives the voice broadcast module, and the work of voice broadcast module output signal drive loudspeaker.
The standby input interface is connected with a standby input circuit, and the signal output end of the standby input circuit is connected with the signal input end of the single chip microcomputer.
As shown in fig. 7, the spare input circuit includes a second protection diode D5, a second filter capacitor C12, a fourth ground resistor, an operational amplifier U4, a third voltage dividing resistor R6, a fourth voltage dividing resistor R8, and a fifth voltage dividing resistor R9.
The power supply end of the standby input interface J3 is connected with a direct-current power supply, the signal output end of the standby input interface J3 is connected with the non-inverting input end of an operational amplifier U4 through a third voltage-dividing resistor R6 and a fourth voltage-dividing resistor R8 in sequence, the inverting input end of the operational amplifier U4 is connected with the output end of the operational amplifier U4, and the output end of the operational amplifier U4 is connected with the signal input end of the single chip microcomputer through a sixth voltage-dividing resistor R9; the signal output end of the standby input circuit is connected with the cathode of a second protection diode D5, and the anode of the second protection diode D5 is grounded; a second filter capacitor C12 is connected in parallel to the second protection diode D5; a third ground resistor R7 is connected between the third voltage dividing resistor R6 and the fourth voltage dividing resistor R8.
The standby input circuit can compare the input signal with the preset signal and output high and low levels to the single chip microcomputer according to the comparison result, so that the single chip microcomputer can run according to the program.
Wherein, in this embodiment, reserve input interface can connect humidity acquisition circuit, and humidity acquisition circuit transmits the humidity information who gathers to reserve input circuit, and reserve input circuit passes through operational amplifier with the signal that receives and handles, afterwards, exports the singlechip, and the singlechip is according to humidity information, judges whether for rainy day, if for rainy day, then personnel's transit time needs corresponding extension.
In a word, the spare input interface that sets up can suitably expand according to later stage needs, if do not have temporarily, also can not use, just adorn the back in advance, and it is more simple and convenient when later stage carries out the function expansion, because, it is relatively more troublesome to carry out equipment fixing maintenance on the expressway.
The standby output interface is connected with a standby output circuit, the signal input end of the standby output circuit is connected with the signal output end of the single chip microcomputer, and the standby output circuit is identical to the LED display lamp driving circuit in structure.
The standby output interface can realize the expansion of later functions, is connected with other relays in a comparison manner, and controls the work of a gate machine and the like.
A CAN communication module U11 (with the model of TJA 1050) is connected to a CAN communication pin of the singlechip, and communication ports (pins PA12 and PA 11) of the singlechip communicate through the CAN communication module U11.
As shown in fig. 10, the driving circuit of the personnel passing display screen and the driving circuit of the vehicle passing display screen both comprise a serial communication module U7, and the single chip microcomputer communicates with the personnel communication display screen J1 and the vehicle communication display screen J2 through serial ports through the serial communication module U7.
In order to further improve the signal transmission capability of the system and enable the system to adapt to the external functions, as shown in fig. 9, an ethernet module U6 (with the model number of CH 9121) is connected to the single chip microcomputer, an ethernet transformer (with the model number of HR 911105A) is connected to the ethernet module U6, the stability of the operation of the ethernet module is protected by the ethernet transformer, the single chip microcomputer can communicate with the external environment through the ethernet module U6, and the communication function of the system is improved.
The system is in default condition, the vehicle passing indication screen displays 'green arrow' and the personnel passing indication screen displays 'red X type'. The horn is not operated.
When the worker needs to walk in the channel, the initial switch is pressed, the geomagnetic vehicle sensor collects the vehicle information and transmits the collected vehicle information to the singlechip,
when the single chip microcomputer judges that no vehicle exists, the single chip microcomputer outputs signals, so that a personnel passing indication screen displays a green arrow, and a vehicle passing display screen displays a red X type; simultaneously, singlechip output signal to voice broadcast module, voice broadcast module drive loudspeaker send "please pass through fast" sound. When the personnel arrive at the safety island, the safety island switch is pressed, the single chip microcomputer directly enters a system default state, and the process is repeated.
The LED display lamp is not pressed down, the system is in a default state after 6 seconds, when a vehicle passes through, the single chip microcomputer outputs signals, the LED display lamp emits light, and after the vehicle passes through for 10 seconds, the LED display lamp is turned off.
When the single chip microcomputer judges that a vehicle exists, the single chip microcomputer outputs a signal, so that the personnel passing indication screen displays a red X-shaped image, and the vehicle passing display screen displays a green arrow; simultaneously, singlechip output signal to voice broadcast module, voice broadcast module drive loudspeaker send the sound of "forbidding to pass through".
The door body includes door frame 4 and door frame 4 articulated guard gate 5, is connected with volute spiral spring between guard gate 5 and door frame 4 simultaneously, guarantees guard gate 5 and can in time close under volute spiral spring's effect after personnel pass through.
The protective door 5 can rotate on the door frame 4, so that the opening or closing of the door body is realized. The side end face of the protective door 5 is iron, and the end face of the door frame 4 corresponding to the side end face of the protective door 5 is provided with an electromagnet 6. The normally closed contact of the relay of the standby output circuit is connected with the power circuit of the electromagnet 6.
During the work, when the singlechip judges can personnel pass through, singlechip output signal to reserve output circuit, the normally closed contact disconnection of reserve output circuit's relay, 6 and the power supply circuit disconnection of electro-magnet to guard gate 5 can be promoted by the staff. When the singlechip outputs a low level, the normally closed contact of the relay is closed, the electromagnet 6 and the power circuit are closed, and the protective door 5 is sucked on the door frame 4 to prevent personnel from opening.
This embodiment is through having set up the door body, prevents to have personnel not noticing the sign of passing, still passes through, further guarantees staff's safety.
The system can enable the working personnel to press the corresponding switch as required, and the system can make an indication whether communication is available or not according to the situation, so that the personal safety of the working personnel on the highway is improved; the expansion port is arranged, functions can be expanded according to needs, in addition, signal transmission modes of the system are various, and the system is greatly convenient for transmitting information of the highway to the outside.
Claims (10)
- The special lane early warning system of ETC, including earth magnetism vehicle sensor, its characterized in that: the intelligent traffic light also comprises a shell, a switch, a personnel passing display screen, a vehicle passing display screen, an LED display module and a loudspeaker, wherein the shell is provided with a standby input interface and a standby output interface;a microcontroller, a power supply module, a switch circuit, a voice broadcasting module and a display driving circuit are arranged in the shell;the power supply module supplies power to the system;the switch is connected with a switch circuit, and the switch circuit is connected with the signal input end of the microcontroller;the geomagnetic vehicle sensor transmits acquired information to the microcontroller, the microcontroller outputs signals to the voice broadcast module and the display driving module respectively, the voice broadcast module drives the loudspeaker to work, and the display driving module drives the personnel passing display screen, the vehicle passing display screen and the LED display module to work.
- 2. The ETC dedicated lane early warning system according to claim 1, wherein: the switch comprises an initial switch and a safety island switch, the initial switch is positioned at two ends of the personnel channel, and the safety island switch is positioned in the middle of the personnel channel; the initial switch and the safety island switch are respectively connected with the signal input end of the microcontroller through a switch circuit.
- 3. The ETC dedicated lane early warning system according to claim 2, wherein: the switch circuit comprises a first voltage-dividing resistor, a second voltage-dividing resistor, a first light-emitting diode, a first optocoupler, a first protection diode, a first grounding resistor, a second grounding resistor, a third grounding resistor and a first filter capacitor;the switch is connected with the anode of the first light-emitting diode through a first divider resistor, the cathode of the first light-emitting diode is connected with the input end of a first optical coupler, the output end of the first optical coupler is connected with the switching signal input end of the microcontroller through a second divider resistor, and the switching signal input end of the microcontroller is grounded through a third grounding resistor;the anode of the first light-emitting diode is also connected with the cathode of the first protection diode, the anode of the first protection diode is grounded through a second grounding resistor, and the anode of the first light-emitting diode is also connected with a parallel circuit of a first grounding resistor and a first filter capacitor.
- 4. The ETC dedicated lane early warning system according to claim 3, wherein: the signal output end of the geomagnetic vehicle sensor is connected with an input circuit, the structure of the input circuit is the same as that of the switch circuit, and the input circuit is connected with the signal input end of the microcontroller.
- 5. The ETC dedicated lane early warning system according to claim 4, wherein: the display driving module comprises a personnel passing display screen driving circuit, a vehicle passing display screen driving circuit and an LED display lamp driving circuit;the LED display module comprises at least three LED display lamps, and the signal output end of the microcontroller is connected with the LED display lamp driving circuit;the LED display lamp driving circuit comprises a sixth voltage-dividing resistor, a second optocoupler, a third protection diode, a seventh voltage-dividing resistor, a second light-emitting diode, a relay and a third filter capacitor;the signal output end of the microcontroller is connected with the input end of the second optocoupler through a sixth voltage-dividing resistor;one end of the output end of the second optocoupler is connected with the anode of a third protection diode, the cathode of the third protection diode is connected with the anode of a second light-emitting diode through a seventh divider resistor, and the cathode of the second light-emitting diode is connected with a coil of the relay;the direct current power supply is connected with the anode of the second light-emitting diode through a seventh divider resistor, and the cathode of the second light-emitting diode is connected with the coil of the relay;the direct current power supply is connected with the LED lamp through a normally open contact of the relay, and the other end of the LED lamp is grounded;the direct current power supply is also grounded through a third filter capacitor;the direct current power supply is further connected with the negative electrode of a third protection diode, the positive electrode of the third protection diode is connected with the first output end of the second optocoupler, and the second output end of the second optocoupler is grounded.
- 6. The ETC dedicated lane early warning system according to claim 5, wherein: the personnel passing display screen driving circuit and the vehicle passing display screen driving circuit both comprise serial communication modules, and the microcontroller is in serial communication with the personnel communication display screen and the vehicle communication display screen through the serial communication modules.
- 7. The ETC dedicated lane early warning system according to claim 6, wherein: the standby input interface is connected with a standby input circuit, and the signal output end of the standby input circuit is connected with the signal input end of the microcontroller;the standby input circuit comprises a second protection diode, a second filter capacitor, a fourth grounding resistor, an operational amplifier, a third voltage dividing resistor, a fourth voltage dividing resistor and a fifth voltage dividing resistor;the power supply end of the standby input interface is connected with a direct-current power supply, the signal output end of the standby input interface is connected with the non-inverting input end of the operational amplifier sequentially through the third voltage dividing resistor and the fourth voltage dividing resistor, the inverting input end of the operational amplifier is connected with the output end of the operational amplifier, and the output end of the operational amplifier is connected with the signal input end of the microcontroller through the fifth voltage dividing resistor;the signal output end of the standby input interface is also connected with the cathode of a second protection diode, and the anode of the second protection diode is grounded;a second filter capacitor is connected in parallel to the second protection diode;the fourth grounding resistor is connected between the third voltage dividing resistor and the fourth voltage dividing resistor.
- 8. The ETC dedicated lane early warning system according to claim 7, wherein: the standby output interface is connected with a standby output circuit, the signal input end of the standby output circuit is connected with the signal output end of the microcontroller, and the standby output circuit is the same as the LED display lamp driving circuit in structure.
- 9. The ETC dedicated lane early warning system according to any one of claims 1 to 8, wherein: the CAN communication pin of the microcontroller is connected with a CAN communication module, and the microcontroller communicates through the CAN communication module.
- 10. The ETC dedicated lane early warning system according to claim 9, wherein: the microcontroller is connected with an Ethernet module, and the Ethernet module is connected with an Ethernet transformer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120815373.XU CN216527286U (en) | 2021-04-21 | 2021-04-21 | ETC special lane early warning system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120815373.XU CN216527286U (en) | 2021-04-21 | 2021-04-21 | ETC special lane early warning system |
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| CN216527286U true CN216527286U (en) | 2022-05-13 |
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