CN205344691U - Passenger protection device that opens door - Google Patents
Passenger protection device that opens door Download PDFInfo
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- CN205344691U CN205344691U CN201620156545.6U CN201620156545U CN205344691U CN 205344691 U CN205344691 U CN 205344691U CN 201620156545 U CN201620156545 U CN 201620156545U CN 205344691 U CN205344691 U CN 205344691U
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- circuit
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- passenger
- chip microcomputer
- opens
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Abstract
The utility model discloses a passenger protection device that opens door, including the singlechip, the ultrasonic wave generating circuit, ultrasonic wave receiving circuit, timing circuit, crystal oscillator circuit, buzzer and the supply circuit that are connected with the singlechip, the singlechip still with control gate circuit connection, the control gate circuit is including setting up in the normally open switch of door handle below. The beneficial effects of the utility model are that, through being connected the singlechip with ultrasonic wave generating circuit, ultrasonic wave receiving circuit, crystal oscillator circuit and supply circuit, realize that the singlechip is calculated the time that safe distance is corresponding according to above -mentioned distance through the round measurement that realizes the distance of rear automobile or pedestrian and door of ultrasonic wave, through switch -on of control gate circuit driving motor or disconnection, and then drive lock switching, the shutting from the main body entrance door has been realized to this in -process, has strengthened the security that the passenger opened the door.
Description
Technical field
This utility model relates to a kind of automotive safety protection field, and especially a kind of passenger opens the door protection device.
Background technology
At present, along with continuing to increase of Chinese each city automobile recoverable amount, urban congestion phenomenon is on the rise.In this context, whether take taxi or the passengers of self driving all when enabling of being everlasting is got off because rear view of vehicle situation cannot be observed, with back car or pedestrian collision and scratch accident when causing getting off, gently then sprain, heavy then lose one's life.For reducing and avoid the generation of this type of phenomenon, design a set of passenger protection device that opens the door and seem and be highly desirable to.
When automobile flameout, if be detected that rear has vehicle to sail, door handle place can light the warning mark of redness.If passenger insists on opening the door, pulling the moment of door handle, door lock place can produce HONGGUANG strongly, stimulate the eyes of passenger, incuring loss through delay passenger's opening time, thus avoiding the generation of accident.
The existing shortcoming opening the door protection device is that manufacturing cost is higher, and is only equipped with in luxury car, it is impossible to penetration and promotion；Additionally, a lot of passengers can't notice red warning lamp when opening the door, even if noticing, can not quickly expect reminding their rear to have vehicles or pedestrians.Finally, when passenger insists on opening the door, stimulated the method also hommization not of passenger eye by high light.
Utility model content
The purpose of this utility model is for overcoming above-mentioned the deficiencies in the prior art, it is provided that a kind of passenger opens the door protection device.
For achieving the above object, this utility model adopts following technical proposals:
Passenger opens the door protection device; including single-chip microcomputer; the ultrasonic output circuit, the ultrasound wave that are connected with single-chip microcomputer receive circuit, timing circuit, crystal oscillating circuit, buzzer and power supply circuits; described single-chip microcomputer is also connected with control gate circuit, and described control gate circuit includes the normal open switch being arranged at below door handle；
Micro Controller Unit (MCU) driving ultrasonic output circuit launches ultrasonic signal, crystal oscillating circuit control single chip computer cycle detection ultrasound wave receives circuit input end signal, timing circuit record ultrasound wave receives circuit input end level and is become, from high level, the time that low level is corresponding, the ultrasound wave the roundtrip corresponding described time is recorded by single-chip microcomputer, using this distance as rear automobile or pedestrian distance passenger distance；
Safe distance is classified by single-chip microcomputer according to described ultrasound wave roundtrip, obtain one-level safe distance and secondary safety distance, and compare according to ultrasound wave roundtrip and one-level safe distance, secondary safety distance, door lock is realized locked according to comparative result direct-driving motor, or realize reporting to the police by buzzer, or it is locked to realize door lock according to the level information drive motor of normal open switch.
Preferably, described single-chip microcomputer model is STC89C51, crystal oscillator frequency 11.05926M, and described ultrasonic output circuit includes supersonic generator, and mid frequency is 40Khz.
Preferably, described ultrasound wave reception circuit includes probe, amplifying circuit and waveform translation circuit.
Preferably, described passenger opens the door and protects device also to include reset circuit, and described reset circuit is connected with single-chip microcomputer RST pin, and reset signal is that high level is effective, and high level effective persistent period is be more than or equal to 24 cycles of oscillation.
It is further preferred that described reset circuit adopts the mode of automatically reseting that powers on.
Preferably, described power supply circuits adopt LM7805 manostat.
The beneficial effects of the utility model are:
1. this utility model is connected by single-chip microcomputer is received circuit, crystal oscillating circuit and power supply circuits with ultrasonic output circuit, ultrasound wave, realize being come and gone the measurement of the distance realizing rear automobile or pedestrian and car door by ultrasound wave, single-chip microcomputer is according to time corresponding to above-mentioned distance exam safe distance, connect or disconnect by controlling gate circuit drive motor, and then drive door lock opening and closing, this process achieves the locking of autonomous car door, enhances the safety that passenger opens the door；
2. alarm device of the present utility model no longer adopts traditional warning mark being arranged at door handle place, affects the sight line that passenger opens the door, and adopts buzzer, the sight line both opened the door without influence on passenger, again to the effect of people's warning；
3. the circuit manufacture that this utility model adopts is simple, less costly, it is easy to promote the use of.
Accompanying drawing explanation
Fig. 1 be this utility model provide passenger open the door protection device structural representation；
Fig. 2 is the circuit diagram that the ultrasound wave that this utility model provides receives circuit；
Fig. 3 is the power supply circuits circuit diagram that this utility model provides.
Detailed description of the invention
Below in conjunction with drawings and Examples, this utility model is further illustrated.
As shown in Figure 1; passenger opens the door protection device; including single-chip microcomputer; the ultrasonic output circuit, the ultrasound wave that are connected with single-chip microcomputer receive circuit, timing circuit, crystal oscillating circuit, buzzer and power supply circuits; described single-chip microcomputer is also connected with control gate circuit, and described control gate circuit includes the normal open switch being arranged at below door handle；
Micro Controller Unit (MCU) driving ultrasonic output circuit launches ultrasonic signal, crystal oscillating circuit control single chip computer cycle detection ultrasound wave receives circuit input end signal, timing circuit record ultrasound wave receives circuit input end level and is become, from high level, the time that low level is corresponding, the ultrasound wave the roundtrip corresponding described time is recorded by single-chip microcomputer, using this distance as rear automobile or pedestrian distance passenger distance；
Safe distance is classified by single-chip microcomputer according to described ultrasound wave roundtrip, obtain one-level safe distance and secondary safety distance, and compare according to ultrasound wave roundtrip and one-level safe distance, secondary safety distance, door lock is realized locked according to comparative result direct-driving motor, or realize reporting to the police by buzzer, or it is locked to realize door lock according to the level information drive motor of normal open switch.
Further, described single-chip microcomputer model is STC89C51 single-chip microcomputer, crystal oscillator frequency 11.05926M, and described ultrasonic output circuit includes supersonic generator, and mid frequency is 40Khz.
Further, described ultrasound wave reception circuit includes probe, amplifying circuit and waveform translation circuit.
Further, described passenger opens the door and protects device also to include reset circuit, and described reset circuit is connected with single-chip microcomputer RST pin, and reset signal is that high level is effective, and high level effective persistent period is be more than or equal to 24 cycles of oscillation.By arranging reset circuit, single-chip microcomputer is made to carry out resetting and reset, it is to avoid subsequent operation is misled by previous operation.
Further, described reset circuit adopts the mode of automatically reseting that powers on.
Further, described power supply circuits adopt LM7805 manostat.
Below with reference to the accompanying drawings passenger is opened the door and protects the work process of device to illustrate:
As shown in Figure 1, single-chip microcomputer P1.0 pin is connected with ultrasonic output circuit, P3.2 pin receives circuit with ultrasound wave and is connected, P3.3 pin is connected with the switch S2 of key switch circuit, P2.3 pin is connected with buzzer, and RST pin is connected with reset circuit, and pin XTAL1 and pin XTAL2 is connected with crystal oscillating circuit, pin Vcc is connected with power supply circuits
Handle for opening door is installed on above switch S2, and when passenger does not pull handle for opening door, switch S2 is off, and P3.3 pin is in high level state all the time.When passenger pulls door handle, switch S2 is depressed, P3.3 pin input low level.Single-chip microcomputer captures low level signal, it is believed that still opening car door by force when passenger has car in the wings, for avoiding accident to occur, the single-chip microcomputer P2.1 pin output signal by being connected with central controlled lock circuit, drive motor rotates, and motor controls door lock work, it is achieved door lock is dead.
Ultrasonic output circuit includes ultrasonic transmitter LS40T, mid frequency is 40Khz, ultrasonic transmitter LS40T is connected with single-chip microcomputer P1.0 pin, single-chip microcomputer sends driving signal by P1.0 pin to ultrasonic transmitter, ultrasonic transmitter receives and drives signal, ultrasonic output circuit generates 40Khz ultrasonic signal, and by P1.0 pin, this ultrasonic signal is sent to single-chip microcomputer, the P3.2 pin foot of single-chip microcomputer interval detection simultaneously.When the level of P3.2 pin becomes low level from high level, ultrasonic signal returns, the time t that timing circuit record ultrasound wave roundtrip consumes, and ultrasound wave roundtrip corresponding to described time is rear automobile or the distance of pedestrian distance passenger.
Embodiment: ultrasonic velocity is 320 metre per second (m/s)s, if the sector region that one-level safe distance is 3 meters of car rear, earphone safe distance is the sector region at 3 meters to 8 meters of car rear.Being can be calculated by above-mentioned parameter, the time that one-level safe distance is corresponding is 3 meters/320 metre per second (m/s)=0.009375 second=9.375 millisecond, is taken as 9.4 milliseconds；The time that secondary safety distance edge is corresponding is 8 meters/320 metre per second (m/s)=0.025 second=25 millisecond.
If the time of ultrasound wave roundtrip consumption is t, the time that one-level safe distance is corresponding is t1, and the time of secondary safety distance correspondence is t2.
As t, < during t1, single-chip microcomputer sends signal to the motor controlling door lock, and drive motor rotates, locked car door, simultaneously whole protection device power-off.
As t1=< t, < during t2, first single-chip microcomputer drives buzzer warning.
When passenger did not carry out door opening action in 7 seconds, single-chip microcomputer thinks that passenger has successfully evaded a risk, and system resets, and again detects；If passenger had door opening action in 7 seconds; it is arranged on the control gate circuit normal open switch below handle for opening door to connect; produce low level signal; when single-chip microcomputer captures this signal; single-chip microcomputer sends signal to the motor controlling door lock; drive motor rotates, locked car door, simultaneously whole protection device power-off.
When passenger pulls up door lock again, whole device switches on power, and system resets, and repeats above-mentioned flow process.
As in figure 2 it is shown, described ultrasound wave receives circuit includes receiving transducer, amplifying circuit and waveform translation circuit.Described amplifying circuit adopts model to be CX20106 chip, and this is used for the ultrasonic signal received is sequentially carried out amplification, filtering.
Described CX20106 chip pin annexation is as follows:
Pin 1 represents ultrasonic signal input, and input impedance takes 40k Ω；
Connect between pin 2 and ground RC network, constitute negative feedback, change RC numerical value and can adjust gain and the frequency characteristic of preamplifier, it is preferable that parameter is R4=4.7 Ω, C4=1 μ F；
Connect between pin 3 and ground detection electric capacity, it is preferable that parameter value is 3.3 μ F；
Pin 4 represents ground connection；
Get involved resistance between pin 5 and power supply, be used for arranging filter centre frequency f0, and the more big mid frequency of resistance is more low, it is preferable that parameter value is 220k Ω, and mid frequency is 38Khz；
Being connected between pin 6 and ground and connect integrating capacitor, arranging standard value is 330pF；
Pin 7 represents the outfan after the amplified Filtering Processing of ultrasonic signal.Because being open collector output, therefore need to increasing a pull-up resistor on pin to power end, resistance is 22k Ω.When this circuit does not receive ultrasonic signal, this outfan is high level, and when this circuit receives ultrasonic signal, this outfan saltus step is low level；
Pin 8 represents and is connected with power supply.
As it is shown on figure 3, power supply circuits adopt model to be the manostat of LM7805.
In these power supply circuits, C1=10 μ F, C2=10 μ F.
Switching S3 and represent normal open switch, described normal open switch is installed below car door door lock, and when door lock unlocks, S3 connects, and power supply circuits are energized, and when door lock is locked, S3 disconnects, and whole passenger opens the door and protects device power-off.
This utility model is connected by single-chip microcomputer is received circuit, crystal oscillating circuit and power supply circuits with ultrasonic output circuit, ultrasound wave, realize being come and gone the measurement of the distance realizing rear automobile or pedestrian and car door by ultrasound wave, single-chip microcomputer is according to time corresponding to above-mentioned distance exam safe distance, connect or disconnect by controlling gate circuit drive motor, and then drive door lock opening and closing, this process achieves the locking of autonomous car door, enhances the safety that passenger opens the door.
Alarm device of the present utility model no longer adopts traditional warning mark being arranged at door handle place, affects the sight line that passenger opens the door, and adopts buzzer, the sight line both opened the door without influence on passenger, again to the effect of people's warning.
Detailed description of the invention of the present utility model is described in conjunction with accompanying drawing although above-mentioned; but the not restriction to this utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art need not pay various amendments or deformation that creative work can make still within protection domain of the present utility model.
Claims (7)
1. passenger opens the door protection device; it is characterized in that; including single-chip microcomputer; the ultrasonic output circuit, the ultrasound wave that are connected with single-chip microcomputer receive circuit, timing circuit, crystal oscillating circuit, buzzer and power supply circuits; described single-chip microcomputer is also connected with control gate circuit, and described control gate circuit includes the normal open switch being arranged at below door handle；
Micro Controller Unit (MCU) driving ultrasonic output circuit launches ultrasonic signal, crystal oscillating circuit control single chip computer cycle detection ultrasound wave receives circuit input end signal, timing circuit record ultrasound wave receives circuit input end level and is become, from high level, the time that low level is corresponding, the ultrasound wave the roundtrip corresponding described time is recorded by single-chip microcomputer, using this distance as rear automobile or pedestrian distance passenger distance；Safe distance is classified by single-chip microcomputer according to described ultrasound wave roundtrip, obtain one-level safe distance and secondary safety distance, and compare according to ultrasound wave roundtrip and one-level safe distance, secondary safety distance, door lock is realized locked according to comparative result direct-driving motor, or realize reporting to the police by buzzer, or it is locked to realize door lock according to the level information drive motor of normal open switch.
2. passenger as claimed in claim 1 opens the door protection device, it is characterized in that, described single-chip microcomputer model is STC89C51, crystal oscillator frequency 11.05926M, and described ultrasonic output circuit includes supersonic generator, and mid frequency is 40Khz.
3. passenger as claimed in claim 1 opens the door protection device, it is characterized in that, the described passenger protection device that opens the door also includes buzzer, and described buzzer is connected with single-chip microcomputer.
4. passenger as claimed in claim 1 opens the door protection device, it is characterized in that, described ultrasound wave receives circuit and includes probe, amplifying circuit and waveform translation circuit.
5. passenger as claimed in claim 1 opens the door protection device; it is characterized in that, described passenger opens the door and protects device also to include reset circuit, and described reset circuit is connected with single-chip microcomputer RST pin; reset signal is that high level is effective, and high level effective persistent period is be more than or equal to 24 cycles of oscillation.
6. passenger as claimed in claim 5 opens the door protection device, it is characterized in that, described reset circuit adopts the mode of automatically reseting that powers on.
7. passenger as claimed in claim 1 opens the door protection device, it is characterized in that, described power supply circuits adopt LM7805 manostat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620156545.6U CN205344691U (en) | 2016-03-02 | 2016-03-02 | Passenger protection device that opens door |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620156545.6U CN205344691U (en) | 2016-03-02 | 2016-03-02 | Passenger protection device that opens door |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205344691U true CN205344691U (en) | 2016-06-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620156545.6U Expired - Fee Related CN205344691U (en) | 2016-03-02 | 2016-03-02 | Passenger protection device that opens door |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205344691U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106585548A (en) * | 2016-10-24 | 2017-04-26 | 深圳市元征软件开发有限公司 | Vehicle door opening safety pre-warning auxiliary control method and system |
| CN106837054A (en) * | 2017-01-18 | 2017-06-13 | 攀枝花学院 | gating circuit based on ultrasonic sensing |
-
2016
- 2016-03-02 CN CN201620156545.6U patent/CN205344691U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106585548A (en) * | 2016-10-24 | 2017-04-26 | 深圳市元征软件开发有限公司 | Vehicle door opening safety pre-warning auxiliary control method and system |
| CN106837054A (en) * | 2017-01-18 | 2017-06-13 | 攀枝花学院 | gating circuit based on ultrasonic sensing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160629 Termination date: 20170302 |