CN208036102U - For passenger's caution system before opening the door of getting off - Google Patents
For passenger's caution system before opening the door of getting off Download PDFInfo
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- CN208036102U CN208036102U CN201820075543.3U CN201820075543U CN208036102U CN 208036102 U CN208036102 U CN 208036102U CN 201820075543 U CN201820075543 U CN 201820075543U CN 208036102 U CN208036102 U CN 208036102U
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Abstract
It is provided by the utility model it is a kind of for get off open the door before passenger's caution system, include for detect current vehicle whether parking first detection unit, for detecting the pressure sensing cell of pressure state at door handle, whether having the second detection unit of vehicle and front vehicle speed, central processing unit, the first power supply unit, the second power supply unit and prewarning unit for detecting rear；Current vehicle rear can accurately be detected according to the parked state of current vehicle whether there is vehicle to sail come, and can accurate evaluation front vehicle at a distance from current vehicle and the speed of vehicle, to make corresponding early warning processing, passenger can be effectively prevent to open car door under non-secure states, it is ensured that passenger getting off car safety.
Description
Technical field
The utility model is related to a kind of security system more particularly to a kind of passenger's caution systems for before enabling of getting off.
Background technology
Every year because passenger getting off car open the door it is improper caused by traffic accident just in rising trend, and present automobile is universal
There is no a kind of prompting driver and passenger to pay attention to the device of rear non-motor vehicle, driver and passenger can only be leaned on to feel observation in lower Chinese herbaceous peony
Whether rear has incidence of the vehicle by reducing accident recently.But most of passenger lacks this awareness of safety, often in automobile
Car door preparation is just urgently opened after coming to a complete stop to get off.City and street especially crowded in big rainy day and big greasy weather and road
Road, though the case where passenger has a look vehicle rear consciously, but since low visibility or vehicle condition are complicated, still can not avoid
Such traffic accident.
There are no a kind of effective means to solve the above problems in the prior art, and similar at present equipment or scheme are exactly
Reverse anti-collision system, reverse anti-collision system are typically to be sensed by the ranging after vehicle when automobile is in state of rolling backward
Device detects the distance between rear obstacle and Ben Che, and when the distance measured is less than set safe distance, report
Alert device will alarm to passenger inside the vehicle, prevent vehicle from knocking rear obstacle.And passenger prepares when getting off, driver usually will not
Alarm distance by gear switch to reverse gear position, and set by reverse anti-collision system is smaller, usually at 1.5 meters or so, if
Rear motor vehicle speed is very fast, even if having carried out early warning, still may knock open car door.
Therefore, in order to solve the above-mentioned technical problem, there is an urgent need for propose a kind of new solution.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of passenger's caution system for before enabling of getting off, it can
Accurately detect whether current vehicle rear has vehicle to sail come and being capable of accurate evaluation rear vehicle according to the parked state of current vehicle
At a distance from current vehicle and the speed of vehicle can effectively prevent passenger non-to make corresponding early warning processing
Car door is opened under safe condition, it is ensured that passenger getting off car safety.
It is provided by the utility model a kind of for passenger's caution system before opening the door of getting off, including be used to detect current vehicle
Whether parking first detection unit, for detecting the pressure sensing cell of pressure state at door handle, for detecting rear
Whether there are the second detection unit of vehicle and front vehicle speed, central processing unit, the first power supply unit, the second power supply single
Member and prewarning unit；
The first detection unit includes the Hall sensor for being set to current vehicle transmission output shaft and the Hall
The amplifying circuit of sensor output connection, the judgement control circuit being connect with the amplification circuit output end, the judgement control
Circuit processed is also connect with central processing unit, the on/off for judging control circuit control second detection unit；
The pressure sensing cell and the output end of second detection unit are connect with central processing circuit, the centre
The input terminal for managing circuit and prewarning unit connects, and the central processing circuit is also connect with entire car controller；
The input terminal of first power supply unit is connected with a vehicle-mounted power supply, for providing 9V work electricity consumptions to amplifying circuit
The input terminal of VC-9, second power supply unit are connected with a vehicle-mounted power supply, for judging control circuit and central processing list
Member provides 5V work electricity consumptions VC-5.
Further, the amplifying circuit includes resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance
R7, adjustable resistance RW1, adjustable resistance RW2, adjustable resistance RW3, triode Q1, triode Q2, capacitance C1, capacitance C2, capacitance
C3, capacitance C4 and diode D1；
One end of the resistance R2 as amplifying circuit input terminal and Hall sensor output end connect, resistance R2 with
Points of common connection between Hall sensor is also connect by resistance R1 with one end of adjustable resistance RW1, and adjustable resistance RW1's is another
The other end of one termination 9V power supply VC-9, resistance R2 is connect with the base stage of triode Q1, and the emitter of triode Q1 passes through resistance
R4 is grounded, and the emitter of triode Q1 is grounded by capacitance C1, and the collector of triode Q1 meets 9V power supply VC-9 by resistance R3,
The collector of triode Q1 is connect by capacitance with one end of adjustable resistance RW3, the other end ground connection of adjustable resistance RW3, adjustable
The movable contact of resistance RW3 is connected to the base stage of triode Q2 by capacitance C3, and the emitter of triode Q2 is grounded by resistance R7,
The emitter of triode Q2 is grounded by capacitance C4, and the base stage of triode Q2 is followed by by resistance R5 and adjustable resistance RW2 series connection
The collector of 9V power supply VC-9, triode Q2 are connect with the anode of diode D1, and the cathode of diode D1 is as amplifying circuit
Output end, wherein diode D1 is rectifier diode.
Further, the judgement control circuit includes comparator U1, resistance R8, resistance R9, resistance R10, adjustable resistance
RW4, optocoupler G1, resistance R11, controllable silicon SCR 1, triode Q3, diode D1 and relay J1；
One end of the resistance R8 is connected to the cathode of diode D1, the in-phase end of the other end and comparator U1 of resistance R8
The reverse side of connection, comparator U1 is followed by power supply VC-9, the output end of comparator U1 by resistance R9 and adjustable resistance RW4 series connection
It is connect with one end of resistance R10, the other end of resistance R10 is connect with the anode of the light emitting diode of optocoupler G1, the hair of optocoupler G1
The cathode of optical diode is grounded, and the collector of the phototriode of optocoupler G1 connects power supply VC-5, the collector and resistance of optocoupler G1
One end of R1 1 connects, and the other end of resistance R11 is connect with central processing power supply, the public affairs between the resistance R10 and optocoupler G1
Tie point is connect by resistance R15 with the control terminal of controllable silicon SCR 1 altogether, and the anode of controllable silicon SCR 1 is connected with a vehicle-mounted power supply, can
The cathode for controlling silicon SCR1 is grounded by the winding coil of relay J1, and the control switch of relay J1 is set to second detection unit
Power end and power supply VC-9 between；The anode of controllable silicon SCR 1 is also connect with the collector of triode Q3, the hair of triode Q3
The base stage of emitter grounding, triode Q3 is connect with the cathode of diode D2, and the anode of diode D2 is connect with central processing unit.
Further, the pressure sensing cell includes resistance R13, resistance R14 and foil gauge RT, and the foil gauge RT is set
It is placed at door handle, one end of the foil gauge RT is connect with power supply VC-5, and the other end is grounded by resistance R13, foil gauge
Points of common connection between RT and resistance R13 is connect by resistance R14 with central processing unit.
Further, the prewarning unit includes resistance R12, triode Q4 and buzzer BU, the electricity of the buzzer BU
Source anode is connect with power supply VC-5, and the power cathode of the buzzer BU is connect with the collector of triode Q4, triode Q4's
Emitter is grounded, and the collector of triode Q4 is connect by resistance R12 with central processing unit.
Further, the central processing unit is STC89C52 single chip.
Further, first power supply unit is LM7809 power supply chips.
Further, second power supply unit is LM7805 power supply chips.
Further, the second detection unit includes ultrasonic wave transmitting module and ultrasonic wave receiving module, the ultrasonic wave
The output end of receiving module is connect with central processing unit.
The beneficial effects of the utility model：By the utility model, can accurately be examined according to the parked state of current vehicle
Survey current vehicle rear and whether there is vehicle to sail and, and can accurate evaluation front vehicle at a distance from current vehicle and vehicle
Speed can effectively prevent passenger to open car door under non-secure states, it is ensured that under passenger to make corresponding early warning processing
Vehicle safety.
Description of the drawings
The utility model is further described with reference to the accompanying drawings and examples：
Fig. 1 is the system construction drawing of the utility model.
Fig. 2 is the amplifying circuit schematic diagram of the utility model.
Fig. 3 is the judgement control circuit schematic diagram of the utility model.
Fig. 4 is the pressure sensing cell circuit diagram of the utility model.
Fig. 5 is the prewarning unit circuit diagram of the utility model.
Specific implementation mode
Further description is made to the utility model below in conjunction with Figure of description：
It is provided by the utility model a kind of for passenger's caution system before opening the door of getting off, including be used to detect current vehicle
Whether parking first detection unit, for detecting the pressure sensing cell of pressure state at door handle, for detecting rear
Whether there are the second detection unit of vehicle and front vehicle speed, central processing unit, the first power supply unit, the second power supply single
Member and prewarning unit；
The first detection unit includes the Hall sensor for being set to current vehicle transmission output shaft and the Hall
The amplifying circuit of sensor output connection, the judgement control circuit being connect with the amplification circuit output end, the judgement control
Circuit processed is also connect with central processing unit, the on/off for judging control circuit control second detection unit；
The pressure sensing cell and the output end of second detection unit are connect with central processing circuit, the centre
The input terminal for managing circuit and prewarning unit connects, and the central processing circuit is also connect with entire car controller；
The input terminal of first power supply unit is connected with a vehicle-mounted power supply, for providing 9V work electricity consumptions to amplifying circuit
The input terminal of VC-9, second power supply unit are connected with a vehicle-mounted power supply, for judging control circuit and central processing list
Member provides 5V work electricity consumptions VC-5；Wherein, the first power supply unit uses LM7809 power supply chips, the second power supply unit to use
LM7805 power supply chips, central processing unit use STC89C52 single chip, it is of course also possible to use other chip microcontrollers,
The second detection unit includes ultrasonic wave transmitting module and ultrasonic wave receiving module, the output end of the ultrasonic wave receiving module
It is connect with central processing unit；Central processing unit controls ultrasonic wave transmitting module works, wherein ultrasonic wave transmitting module is based on
The ultrasonic wave transmitting circuit of MAX232, ultrasonic wave receiving circuit of the ultrasonic wave receiving circuit based on CX20106, belongs to existing skill
Art, not in this to go forth；By above structure, current vehicle rear can be accurately detected according to the parked state of current vehicle
Whether there is vehicle to sail to come, and can accurate evaluation front vehicle at a distance from current vehicle and the speed of vehicle, to make
Corresponding early warning processing, can effectively prevent passenger to open car door under non-secure states, it is ensured that passenger getting off car safety.
In the present embodiment, the amplifying circuit include resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6,
Resistance R7, adjustable resistance RW1, adjustable resistance RW2, adjustable resistance RW3, triode Q1, triode Q2, capacitance C1, capacitance C2, electricity
Hold C3, capacitance C4 and diode D1；
One end of the resistance R2 as amplifying circuit input terminal and Hall sensor output end connect, resistance R2 with
Points of common connection between Hall sensor is also connect by resistance R1 with one end of adjustable resistance RW1, and adjustable resistance RW1's is another
The other end of one termination 9V power supply VC-9, resistance R2 is connect with the base stage of triode Q1, and the emitter of triode Q1 passes through resistance
R4 is grounded, and the emitter of triode Q1 is grounded by capacitance C1, and the collector of triode Q1 meets 9V power supply VC-9 by resistance R3,
The collector of triode Q1 is connect by capacitance with one end of adjustable resistance RW3, the other end ground connection of adjustable resistance RW3, adjustable
The movable contact of resistance RW3 is connected to the base stage of triode Q2 by capacitance C3, and the emitter of triode Q2 is grounded by resistance R7,
The emitter of triode Q2 is grounded by capacitance C4, and the base stage of triode Q2 is followed by by resistance R5 and adjustable resistance RW2 series connection
The collector of 9V power supply VC-9, triode Q2 are connect with the anode of diode D1, and the cathode of diode D1 is as amplifying circuit
Output end, wherein diode D1 is rectifier diode, since Hall sensor (using existing Hall sensor) is to be based on electromagnetism
Principle of induction, the tach signal of the transmission output shaft of Hall sensor detection is AC signal, but weaker, by above-mentioned
Structure can be realized and carry out stable amplification to tach signal, be conducive to subsequent processing and control, wherein adjustable resistance RW1 and adjustable
Resistance RW2 is used to set the workspace of triode, so that triode is in Linear Amplifer region always, and between two triodes
It is coupled by capacitance C2 and adjustable resistance R3, the stability of signal can be effectively improved.
In the present embodiment, the judgement control circuit includes comparator U1, resistance R8, resistance R9, resistance R10, adjustable electric
Hinder RW4, optocoupler G1, resistance R11, controllable silicon SCR 1, triode Q3, diode D1 and relay J1；In Fig. 3, ULT indicates the
Two detection units；
One end of the resistance R8 is connected to the cathode of diode D1, the in-phase end of the other end and comparator U1 of resistance R8
The reverse side of connection, comparator U1 is followed by power supply VC-9, the output end of comparator U1 by resistance R9 and adjustable resistance RW4 series connection
It is connect with one end of resistance R10, the other end of resistance R10 is connect with the anode of the light emitting diode of optocoupler G1, the hair of optocoupler G1
The cathode of optical diode is grounded, and the collector of the phototriode of optocoupler G1 connects power supply VC-5, the collector and resistance of optocoupler G1
One end of R1 1 connects, and the other end of resistance R11 is connect with central processing power supply, the public affairs between the resistance R10 and optocoupler G1
Tie point is connect by resistance R15 with the control terminal of controllable silicon SCR 1 altogether, and the anode of controllable silicon SCR 1 is connected with a vehicle-mounted power supply, can
The cathode for controlling silicon SCR1 is grounded by the winding coil of relay J1, and the control switch of relay J1 is set to second detection unit
Power end and power supply VC-9 between；The anode of controllable silicon SCR 1 is also connect with the collector of triode Q3, the hair of triode Q3
The base stage of emitter grounding, triode Q3 is connect with the cathode of diode D2, and the anode of diode D2 is connect with central processing unit,
Hall sensor detection tach signal changes with the variation of rotating speed, and when vehicle parking, the rotating speed of speed changer is relatively low, when putting
The voltage signal of big circuit output is less than setting voltage, then U1 exports high level, high level one side triggering controllable silicon SCR 1
Conducting so that relay obtain it is electric, ultrasonic wave transmitting module and ultrasonic wave receiving module obtain it is electric be waken up, and optocoupler G1 is led at this time
Logical, central processing unit is entered low level signal, at this point, central processing circuit control ultrasonic wave transmitting module transmitting ultrasound
Whether wave, detection current vehicle rear or side rear, which have vehicle to sail, is come, if any central processing circuit is simultaneously true in the following way
Determine the distance and speed of rear or side front vehicle：
S1. central processing unit controls ultrasonic wave transmitting module works, and records the launch time of ultrasonic wave transmitting module
The receiving time of ultrasonic signal is received with ultrasonic wave receiving module, wherein the launch time of ultrasonic wave transmitting module is with center
Processing unit is sent to ultrasonic transmitter subject to control command, and the receiving time of ultrasonic wave receiving module is received with ultrasonic wave
Module is inputted to central processing circuit and is received subject to signal, although there is some deviations, since electric signal is passed than ultrasonic signal
Defeated speed is faster, and therefore, which can't cause actual influence；
S2. D1 is obtained by range formula：D1=V*T1/2 is calculated, wherein D1 is to measure Ben Che and rear vehicle for the first time
Distance, V is the aerial propagation rate of ultrasonic wave, T1 be first time ultrasonic wave back and forth Ben Che and front vehicle when
Between；
It repeats step S1 and obtains D2：D2=V*T2/2, wherein D2 is to measure Ben Che for the second time at a distance from front vehicle, V
For the aerial propagation rate of ultrasonic wave, T2 is the time of second of ultrasonic wave Ben Che and front vehicle back and forth, then basis
Following formula calculates the speed Vc of front vehicle：
Vc=(D1-D2)/(T1-T2).
Have that vehicle and distance are less than safe distance and speed is larger when obtaining rear or side rear by the above method,
Central processing unit sends vehicle door lock order to full-vehicle control, does not allow to drive, moreover, pressure sensing cell also detects vehicle
Whether pressure input is had at door handle, if so, then detecting signal to central processing unit input pressure, central processing unit connects
Alarmed by prewarning unit after receipts, if rear is in a safe condition, i.e., rear measurement distance farther out (i.e. safe distance with
Outside) and speed is relatively slow (will not cause danger to this vehicle within the setting time getting off), even if central processing circuit receives pressure
Force signal will not equally alarm, will not doors locked；After passenger safety is got off, vehicle restarting, then tach signal is electric
Pressure is more than setting voltage, at this point, comparator U1 exports low level, the control signal of central processing unit is restored to high electricity
It is flat, at this point, the Q3 conductings of central processing unit controls triode so that controllable silicon SCR 1 is ended, to ultrasonic wave transmitting module and
Ultrasonic wave receiving module dead electricity again.
In the present embodiment, the pressure sensing cell includes resistance R13, resistance R14 and foil gauge RT, the foil gauge
RT is set at door handle, and one end of the foil gauge RT is connect with power supply VC-5, and the other end is grounded by resistance R13, is answered
The points of common connection become between piece RT and resistance R13 is connect by resistance R14 with central processing unit, and this structure, energy are passed through
The behavior to be got off for enough detecting passenger, when vehicle is in normal form or under safety condition, even if pressure sensing cell has letter
Number output, central processing unit do not handled.
In the present embodiment, the prewarning unit includes resistance R12, triode Q4 and buzzer BU, the buzzer BU
Positive pole connect with power supply VC-5, the power cathode of the buzzer BU is connect with the collector of triode Q4, triode
The emitter of Q4 is grounded, and the collector of triode Q4 is connect by resistance R12 with central processing unit, and this structure, energy are passed through
Enough to be conducive to progress and alarm, certainly, buzzer can be substituted by voice prompting device.
Finally illustrate, above example is merely intended for describing the technical solutions of the present application, but not for limiting the present application, although ginseng
The utility model is described in detail according to preferred embodiment, it will be understood by those of ordinary skill in the art that, it can be to this
The technical solution of utility model is modified or replaced equivalently, without departing from the objective and model of technical solutions of the utility model
It encloses, should all cover in the right of the utility model.
Claims (9)
1. a kind of for passenger's caution system before opening the door of getting off, it is characterised in that：Including being used to detect whether current vehicle to stay
The first detection unit of vehicle, for detecting the pressure sensing cell of pressure state at door handle, for detecting whether rear has
The second detection unit of vehicle and front vehicle speed, central processing unit, the first power supply unit, the second power supply unit and
Prewarning unit；
The first detection unit includes the Hall sensor for being set to current vehicle transmission output shaft and the hall sensing
The amplifying circuit of device output end connection, the judgement control circuit being connect with the amplification circuit output end, the judgement control electricity
Road is also connect with central processing unit, the on/off for judging control circuit control second detection unit；
The pressure sensing cell and the output end of second detection unit are connect with central processing circuit, the central processing electricity
The input terminal of road and prewarning unit connects, and the central processing circuit is also connect with entire car controller；
The input terminal of first power supply unit is connected with a vehicle-mounted power supply, for providing 9V work electricity consumption VC-9 to amplifying circuit,
The input terminal of second power supply unit is connected with a vehicle-mounted power supply, for judge control circuit and central processing unit offer
5V work electricity consumptions VC-5.
2. being used for passenger's caution system before opening the door of getting off according to claim 1, it is characterised in that：The amplifying circuit packet
Include resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, resistance R7, adjustable resistance RW1, adjustable resistance RW2, can
Adjust resistance RW3, triode Q1, triode Q2, capacitance C1, capacitance C2, capacitance C3, capacitance C4 and diode D1；
One end of the resistance R2 is connected as the input terminal of amplifying circuit and the output end of Hall sensor, resistance R2 and Hall
Points of common connection between sensor is also connect by resistance R1 with one end of adjustable resistance RW1, the other end of adjustable resistance RW1
9V power supply VC-9 are met, the other end of resistance R2 is connect with the base stage of triode Q1, and the emitter of triode Q1 is connect by resistance R4
The emitter on ground, triode Q1 is grounded by capacitance C1, and the collector of triode Q1 connects 9V power supplys VC-9, three poles by resistance R3
The collector of pipe Q1 is connect by capacitance with one end of adjustable resistance RW3, the other end ground connection of adjustable resistance RW3, adjustable resistance
The movable contact of RW3 is connected to the base stage of triode Q2 by capacitance C3, and the emitter of triode Q2 is grounded by resistance R7, three poles
The emitter of pipe Q2 is grounded by capacitance C4, and the base stage of triode Q2 is followed by 9V electricity by resistance R5 and adjustable resistance RW2 series connection
The anode of the collector of source VC-9, triode Q2 and diode D1 are connect, the output of the cathode of diode D1 as amplifying circuit
End, wherein diode D1 is rectifier diode.
3. being used for passenger's caution system before opening the door of getting off according to claim 2, it is characterised in that：The judgement control electricity
Road includes comparator U1, resistance R8, resistance R9, resistance R10, adjustable resistance RW4, optocoupler G1, resistance R11, controllable silicon SCR 1, three
Pole pipe Q3, diode D1 and relay J1；
One end of the resistance R8 is connected to the cathode of diode D1, and the other end of resistance R8 connects with the in-phase end of comparator U1
Connect, the reverse side of comparator U1 is followed by power supply VC-9 by resistance R9 and adjustable resistance RW4 series connection, the output end of comparator U1 with
One end of resistance R10 connects, and the other end of resistance R10 is connect with the anode of the light emitting diode of optocoupler G1, and optocoupler G1's shines
The cathode of diode is grounded, and the collector of the phototriode of optocoupler G1 meets power supply VC-5, collector and the resistance R11 of optocoupler G1
One end connection, the other end of resistance R11 connect with central processing power supply, the public company between the resistance R10 and optocoupler G1
Contact is connect by resistance R15 with the control terminal of controllable silicon SCR 1, and the anode of controllable silicon SCR 1 is connected with a vehicle-mounted power supply, silicon-controlled
The cathode of SCR1 is grounded by the winding coil of relay J1, and the control switch of relay J1 is set to the electricity of second detection unit
Between source and power supply VC-9；The anode of controllable silicon SCR 1 is also connect with the collector of triode Q3, the emitter of triode Q3
Ground connection, the base stage of triode Q3 are connect with the cathode of diode D2, and the anode of diode D2 is connect with central processing unit.
4. being used for passenger's caution system before opening the door of getting off according to claim 1, it is characterised in that：The pressure detecting list
Member includes resistance R13, resistance R14 and foil gauge RT, and the foil gauge RT is set at door handle, the foil gauge RT's
One end is connect with power supply VC-5, and the other end is grounded by resistance R13, and the points of common connection between foil gauge RT and resistance R13 is logical
Resistance R14 is crossed to connect with central processing unit.
5. being used for passenger's caution system before opening the door of getting off according to claim 1, it is characterised in that：The prewarning unit packet
It includes resistance R12, triode Q4 and buzzer BU, the positive pole of the buzzer BU is connect with power supply VC-5, the buzzing
The power cathode of device BU is connect with the collector of triode Q4, the emitter ground connection of triode Q4, and the collector of triode Q4 is logical
Resistance R12 is crossed to connect with central processing unit.
6. being used for passenger's caution system before opening the door of getting off according to claim 1, it is characterised in that：The central processing list
Member is STC89C52 single chip.
7. being used for passenger's caution system before opening the door of getting off according to claim 1, it is characterised in that：First power supply is single
Member is LM7809 power supply chips.
8. being used for passenger's caution system before opening the door of getting off according to claim 1, it is characterised in that：Second power supply is single
Member is LM7805 power supply chips.
9. being used for passenger's caution system before opening the door of getting off according to claim 1, it is characterised in that：Second detection is single
Member includes ultrasonic wave transmitting module and ultrasonic wave receiving module, the output end and central processing unit of the ultrasonic wave receiving module
Connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820075543.3U CN208036102U (en) | 2018-01-17 | 2018-01-17 | For passenger's caution system before opening the door of getting off |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820075543.3U CN208036102U (en) | 2018-01-17 | 2018-01-17 | For passenger's caution system before opening the door of getting off |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208036102U true CN208036102U (en) | 2018-11-02 |
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ID=63953304
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820075543.3U Expired - Fee Related CN208036102U (en) | 2018-01-17 | 2018-01-17 | For passenger's caution system before opening the door of getting off |
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| Country | Link |
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| CN (1) | CN208036102U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108216027A (en) * | 2018-01-17 | 2018-06-29 | 重庆交通大学 | Passenger opens the door and gets off anti-collision early warning system |
-
2018
- 2018-01-17 CN CN201820075543.3U patent/CN208036102U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108216027A (en) * | 2018-01-17 | 2018-06-29 | 重庆交通大学 | Passenger opens the door and gets off anti-collision early warning system |
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