CN204229655U - A kind of vehicular safety distance monitoring alarm - Google Patents
A kind of vehicular safety distance monitoring alarm Download PDFInfo
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- CN204229655U CN204229655U CN201420629524.2U CN201420629524U CN204229655U CN 204229655 U CN204229655 U CN 204229655U CN 201420629524 U CN201420629524 U CN 201420629524U CN 204229655 U CN204229655 U CN 204229655U
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Abstract
The utility model discloses a kind of vehicular safety distance monitoring alarm, this device allows driver can obtain the present interval distance of vehicle and the front vehicles of oneself driving in real time, whether be convenient to driver enters in the safe distance in hot pursuit with front truck according to the vehicle that present interval Distance Judgment oneself is driven, and sound the alarm to point out driver Reduced Speed Now, effectively can avoid vehicle rear-end collision.Comprise the ECU of automobile, laser velocimeter, ultrasonic distance-measuring sensor, single-chip microcomputer and warning circuit; Warning circuit comprises hummer, current-limiting circuit, afterflow inductance L and on-off circuit; Current-limiting circuit comprises resistance R3, resistance R4, resistance R5 and triode Q2; Warning circuit comprises hummer, afterflow inductance L, current-limiting circuit, on-off circuit, and on-off circuit comprises resistance R1, resistance R2 and triode Q1; Single-chip microcomputer is connected with laser velocimeter, ultrasonic distance-measuring sensor and ECU respectively, and single-chip microcomputer is also connected with the BUZ buzzing input end of described warning circuit.
Description
Technical field
The utility model relates to vehicle security drive field, especially relates to a kind of vehicular safety distance monitoring alarm.
Background technology
At present, the accident that vehicle causes casualties because of rear-end collision emerges in an endless stream, and most of rear-end collision is all because front truck brakes suddenly, causes rear car cannot stop in time under former enforcement distance and rear-end collision occurs.Running distance is generally rule of thumb held by driver, there is very large uncertainty.Especially in the section of road conditions complexity, be difficult to judge steering vehicle and leading vehicle distance, when there is emergency situations with regard to easy because of with front vehicles hypotelorism and cause knocking into the back.Chinese patent Authorization Notice No.: CN201325371Y, authorized announcement date on October 14th, 2009, disclose a kind of automobile safety warning device, it by being connected with safety failure alarm lamp on combination instrument chip, points out driver to occur air bag fault or brake fault at automobile.Weak point be it can only detect automobile itself occur fault, and effectively can not judge whether to exceed safe distance according to the Distance geometry current vehicle speed of the vehicle oneself driven and front vehicles, therefore this warning device can not point out driver's Reduced Speed Now, can not prevent the generation of rear-end collision.
Utility model content
The utility model be in order to overcome existing warning device can not allow the distance of driver's real-time judge and front vehicles whether exceed safe distance deficiency, there is provided a kind of driver of allowing can obtain the present interval distance of vehicle and the front vehicles of oneself driving in real time, whether be convenient to driver enters in the safe distance in hot pursuit with front truck according to the vehicle that present interval Distance Judgment oneself is driven, and sound the alarm to point out driver Reduced Speed Now, effectively can avoid a kind of vehicular safety distance monitoring alarm of vehicle rear-end collision.
To achieve these goals, the utility model is by the following technical solutions:
A kind of vehicular safety distance monitoring alarm, comprises the ECU of automobile, also comprises laser velocimeter, ultrasonic distance-measuring sensor, single-chip microcomputer and warning circuit, warning circuit comprises hummer, current-limiting circuit, afterflow inductance L and on-off circuit, current-limiting circuit comprises resistance R3, resistance R4, resistance R5 and triode Q2, on-off circuit comprises resistance R1, resistance R2 and triode Q1, one end of resistance R1 is the BUZ buzzing input end of warning circuit, the other end of resistance R1 is connected with the base stage of triode Q1, one end of resistance R2 is connected with the base stage of triode Q1, the other end of resistance R2 is connected with the emitter of triode Q1, the emitter of triode Q1 is connected with VCC power supply, the collector of triode Q1 is connected with one end of afterflow inductance L, the other end of afterflow inductance L is connected with the collector of triode Q2, one end of resistance R3 is connected with the collector of triode Q2, the other end of resistance R3 is connected with the base stage of triode Q2, one end of resistance R4 is connected with the base stage of triode Q2, the other end of resistance R4 is connected with the positive pole of hummer, one end of resistance R5 is connected with the emitter of triode Q2, the other end of resistance R5 is connected with the positive pole of hummer, the negative pole of hummer is connected with GND earth terminal, single-chip microcomputer is connected with laser velocimeter, ultrasonic distance-measuring sensor and ECU respectively, and single-chip microcomputer is also connected with the BUZ buzzing input end of described warning circuit.
Laser velocimeter can by the present speed of front vehicles, be presented on ECU (vehicle-mounted computer) screen of automobile in real time, ultrasonic distance-measuring sensor can detect the distance with front automobile in real time, again according to the braking distance (considering the factors such as driver's reaction time) of general vehicle, calculate the safe distance under vehicle current running state by single-chip microcomputer.If the time in that the distance that ultrasonic distance-measuring sensor detects being more than or equal to safe distance, normally travel; If the time in that the distance that ultrasonic distance-measuring sensor detects being less than safe distance, warning circuit is started working, prompting driver Reduced Speed Now, just quits work until the distance that ultrasonic distance-measuring sensor detects is more than or equal to safe distance alarm circuit.After warning circuit quits work, recalculate current safe distance, repeat aforesaid operations, even if front automobile is braked suddenly, also can stop in time or turn to, avoid vehicle rear-end collision.
The break-make that warning circuit controls hummer by triode Q1 realizes reporting to the police, thus prompting driver Reduced Speed Now, during warning circuit input end input low level pulse signal, Q1 saturation conduction hummer starts; During input high level pulse signal, Q1 ends hummer and automatically closes.When high pressure appears in warning circuit, current-limiting circuit can limit the electric current that hummer passes through, for the protection of hummer.
This programme allows driver can obtain the present interval distance of vehicle and the front vehicles of oneself driving in real time, whether be convenient to driver enters in the safe distance in hot pursuit with front truck according to the vehicle that present interval Distance Judgment oneself is driven, and sound the alarm to point out driver Reduced Speed Now, effectively can avoid vehicle rear-end collision.
As preferably, single-chip microcomputer adopts model to be the AVR single chip of Atmegal6L, be that the PB3 port of the AVR single chip of Atmegal6L is connected with the BUZ buzzing input end of described warning circuit model, being that the PD0 port of the AVR single chip of Atmegal6L is connected with the RXD port of ECU model, is that the PD1 port of the AVR single chip of Atmegal6L is connected with the TXD port of ECU model.
Adopt KWP2000 agreement to communicate with the ECU of automobile, achieve the data transmit-receive of the ECU of single-chip microcomputer and automobile, thus read the data of the current running car in ECU.
As preferably, ultrasonic distance-measuring sensor adopts model to be the ultrasonic distance-measuring sensor of SIEMENS-3RG6176, is that the ultrasonic distance-measuring sensor of SIEMENS-3RG6176 is connected by the AVR single chip that serial communication interface and model are Atmegal6L model.This structure can measure the speed of front vehicles in real time, and reliability is high.
As preferably, laser velocimeter adopts model to be the laser velocimeter of LTI20-20Trucam, is that the laser velocimeter of LTI20-20Trucam is connected by the AVR single chip that serial communication interface and model are Atmegal6L model.This structure can measure the speed of front vehicles in real time, and reliability is high.
As preferably, laser velocimeter is fixed on the windshield of automobile.This structure installment is simple, easy to use.
The utility model has following beneficial effect:
1, the utility model allows driver can obtain the present interval distance of vehicle and the front vehicles of oneself driving in real time, whether be convenient to driver enters in the safe distance in hot pursuit with front truck according to the vehicle that present interval Distance Judgment oneself is driven, and sound the alarm to point out driver Reduced Speed Now, effectively can avoid vehicle rear-end collision.
2, be provided with current-limiting circuit in warning circuit, can effectively limit hummer working current, protection hummer.
3, point out driver whether to exceed safe distance by warning circuit, even if front automobile is braked suddenly, also can stop in time or turn to, effectively can avoid vehicle rear-end collision.
Accompanying drawing explanation
Fig. 1 is a kind of circuit theory syndeton schematic block diagram of the present utility model.
Fig. 2 is a kind of circuit diagram of the utility model warning circuit.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is further described.
Embodiment is as shown in Figure 1 and Figure 2 a kind of vehicular safety distance monitoring alarm, comprises the ECU500 of automobile, also comprises laser velocimeter 100, ultrasonic distance-measuring sensor 200, single-chip microcomputer and warning circuit, warning circuit 400 comprises hummer, current-limiting circuit, afterflow inductance L and on-off circuit, current-limiting circuit comprises resistance R3, resistance R4, resistance R5 and triode Q2, on-off circuit comprises resistance R1, resistance R2 and triode Q1, one end of resistance R1 is the BUZ buzzing input end of warning circuit, the other end of resistance R1 is connected with the base stage of triode Q1, one end of resistance R2 is connected with the base stage of triode Q1, the other end of resistance R2 is connected with the emitter of triode Q1, the emitter of triode Q1 is connected with VCC power supply, the collector of triode Q1 is connected with one end of afterflow inductance L, the other end of afterflow inductance L is connected with the collector of triode Q2, one end of resistance R3 is connected with the collector of triode Q2, the other end of resistance R3 is connected with the base stage of triode Q2, one end of resistance R4 is connected with the base stage of triode Q2, the other end of resistance R4 is connected with the positive pole of hummer, one end of resistance R5 is connected with the emitter of triode Q2, the other end of resistance R5 is connected with the positive pole of hummer, the negative pole of hummer is connected with GND earth terminal, single-chip microcomputer is connected with laser velocimeter, ultrasonic distance-measuring sensor and ECU respectively, and single-chip microcomputer is also connected with the BUZ buzzing input end of described warning circuit.Single-chip microcomputer employing model is the AVR single chip 300 of Atmegal6L, be that the PB3 port of the AVR single chip of Atmegal6L is connected with the BUZ buzzing input end of described warning circuit model, being that the PD0 port of the AVR single chip of Atmegal6L is connected with the RXD port of ECU model, is that the PD1 port of the AVR single chip of Atmegal6L is connected with the TXD port of ECU model.Realize the data transmit-receive with ECU, thus read the data of self running car current in ECU.Ultrasonic distance-measuring sensor adopts model to be the ultrasonic distance-measuring sensor of SIEMENS-3RG6176, is that the ultrasonic distance-measuring sensor of SIEMENS-3RG6176 is connected by the AVR single chip that serial communication interface and model are Atmegal6L model.Laser velocimeter adopts model to be the laser velocimeter of LTI20-20Trucam, is that the laser velocimeter of LTI20-20Trucam is connected by the AVR single chip that serial communication interface and model are Atmegal6L model; The rate accuracy of LTI20-20Trucam laser velocimeter is ± 2km/h, the range that tests the speed is 0 ~ 320km/h, the travel speed of current most automobile is all within the scope of this, meet the request for utilization in vehicle traveling process, and there is higher measuring accuracy, it is communicated with Atmegal6L by RS232 serial ports, sends the data to Atmegal6L in real time.Laser velocimeter is fixed on the windshield of automobile.
The break-make that warning circuit controls hummer by triode Q1 realizes reporting to the police, thus prompting driver Reduced Speed Now, during warning circuit input end input low level pulse signal, Q1 saturation conduction hummer starts; During input high level pulse signal, Q1 ends hummer and automatically closes.When high pressure appears in warning circuit, current-limiting circuit can limit the electric current that hummer passes through, for the protection of hummer.The inductance value of afterflow inductance L is 20 milihenries, and resistance R1 resistance is 1.5 kilo-ohms, and resistance R2 resistance is 4.7 kilo-ohms, and triode Q1 is used for controlling the break-make of hummer, when BUZ holds input low level pulse signal, and triode Q1 saturation conduction, hummer starts; During BUZ end input high level pulse signal, triode Q1 ends hummer and automatically closes, inductance L after powered up storage power discharges gradually again, hummer is a perceptual original paper, its electric current can not suddenly change, current break easily causes the triode on driving circuit to burn out, and therefore connects an afterflow inductance L at hummer, for hummer provides a continuous print electric current.When electric current is less than setting electric current, triode Q2 saturation conduction; When electric current is greater than setting electric current, triode Q2 ends, and limits the electric current that triode Q2 passes through, thus protection hummer.Adopt KWP2000 agreement to communicate with the ECU of automobile, achieve the data transmit-receive of the ECU of single-chip microcomputer and automobile, thus read the data of the current running car in ECU.
Laser velocimeter can by the present speed of front vehicles, be presented on the ECU screen of automobile in real time, ultrasonic distance-measuring sensor can detect the distance with front automobile in real time, again according to the braking distance (considering the factors such as driver's reaction time) of general vehicle, calculate the safe distance under vehicle current running state by single-chip microcomputer.If the time in that the distance that ultrasonic distance-measuring sensor detects being more than or equal to safe distance, normally travel; If the time in that the distance that ultrasonic distance-measuring sensor detects being less than safe distance, warning circuit is started working, prompting driver Reduced Speed Now, just quits work until the distance that ultrasonic distance-measuring sensor detects is more than or equal to safe distance alarm circuit.After warning circuit quits work, recalculate current safe distance, repeat aforesaid operations, even if front automobile is braked suddenly, also can stop in time or turn to, avoid vehicle rear-end collision.
This example allows driver can obtain the present interval distance of vehicle and the front vehicles of oneself driving in real time, whether be convenient to driver enters in the safe distance in hot pursuit with front truck according to the vehicle that present interval Distance Judgment oneself is driven, and sound the alarm to point out driver Reduced Speed Now, effectively can avoid vehicle rear-end collision.
Claims (5)
1. a vehicular safety distance monitoring alarm, comprises the ECU of automobile, it is characterized in that, also comprises laser velocimeter, ultrasonic distance-measuring sensor, single-chip microcomputer and warning circuit;
Warning circuit comprises hummer, current-limiting circuit, afterflow inductance L and on-off circuit; Current-limiting circuit comprises resistance R3, resistance R4, resistance R5 and triode Q2; On-off circuit comprises resistance R1, resistance R2 and triode Q1;
One end of resistance R1 is the BUZ buzzing input end of warning circuit, the other end of resistance R1 is connected with the base stage of triode Q1, one end of resistance R2 is connected with the base stage of triode Q1, the other end of resistance R2 is connected with the emitter of triode Q1, the emitter of triode Q1 is connected with VCC power supply, the collector of triode Q1 is connected with one end of afterflow inductance L, the other end of afterflow inductance L is connected with the collector of triode Q2, one end of resistance R3 is connected with the collector of triode Q2, the other end of resistance R3 is connected with the base stage of triode Q2, one end of resistance R4 is connected with the base stage of triode Q2, the other end of resistance R4 is connected with the positive pole of hummer, one end of resistance R5 is connected with the emitter of triode Q2, the other end of resistance R5 is connected with the positive pole of hummer, the negative pole of hummer is connected with GND earth terminal,
Single-chip microcomputer is connected with laser velocimeter, ultrasonic distance-measuring sensor and ECU respectively, and single-chip microcomputer is also connected with the BUZ buzzing input end of described warning circuit.
2. a kind of vehicular safety distance monitoring alarm according to claim 1, it is characterized in that, single-chip microcomputer adopts model to be the AVR single chip of Atmega16L, be that the PB3 port of the AVR single chip of Atmega16L is connected with the BUZ buzzing input end of described warning circuit model, being that the PD0 port of the AVR single chip of Atmega16L is connected with the RXD port of ECU model, is that the PD1 port of the AVR single chip of Atmega16L is connected with the TXD port of ECU model.
3. a kind of vehicular safety distance monitoring alarm according to claim 2, it is characterized in that, ultrasonic distance-measuring sensor adopts model to be the ultrasonic distance-measuring sensor of SIEMENS-3RG6176, is that the ultrasonic distance-measuring sensor of SIEMENS-3RG6176 is connected by the AVR single chip that serial communication interface and model are Atmega16L model.
4. a kind of vehicular safety distance monitoring alarm according to claim 3, it is characterized in that, laser velocimeter adopts model to be the laser velocimeter of LTI20-20Trucam, is that the laser velocimeter of LTI20-20Trucam is connected by the AVR single chip that serial communication interface and model are Atmega16L model.
5. a kind of vehicular safety distance monitoring alarm according to claim 1 or 4, it is characterized in that, laser velocimeter is fixed on the windshield of automobile.
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| CN104875388A (en) * | 2015-05-12 | 2015-09-02 | 杭州先临三维科技股份有限公司 | 3D (third-dimensional) printer detection device and operation method thereof |
| CN105069600A (en) * | 2015-08-24 | 2015-11-18 | 无锡贺邦金属制品有限公司 | Safety management platform used for truck transportation |
| CN105096088A (en) * | 2015-08-24 | 2015-11-25 | 无锡贺邦金属制品有限公司 | Management platform for truck transportation |
| CN105160938A (en) * | 2015-08-24 | 2015-12-16 | 无锡贺邦金属制品有限公司 | Management platform for transportation |
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| CN105160914A (en) * | 2015-08-24 | 2015-12-16 | 无锡贺邦金属制品有限公司 | Safety management system for freight transportation |
| CN105205631A (en) * | 2015-08-24 | 2015-12-30 | 无锡贺邦金属制品有限公司 | Safety management platform used for transportation |
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| CN109272977A (en) * | 2018-10-25 | 2019-01-25 | 无锡十顶电子科技有限公司 | A kind of high-performance buzzer drive circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105673792A (en) * | 2014-11-19 | 2016-06-15 | 中国科学院沈阳自动化研究所 | Flexible transmission device capable of measuring output torque |
| CN105673792B (en) * | 2014-11-19 | 2017-09-29 | 中国科学院沈阳自动化研究所 | It is a kind of to measure the flexible gearing of output torque |
| CN104875388A (en) * | 2015-05-12 | 2015-09-02 | 杭州先临三维科技股份有限公司 | 3D (third-dimensional) printer detection device and operation method thereof |
| CN104875388B (en) * | 2015-05-12 | 2018-12-18 | 先临三维科技股份有限公司 | A kind of 3D printer detection device and its operation method |
| CN105069600A (en) * | 2015-08-24 | 2015-11-18 | 无锡贺邦金属制品有限公司 | Safety management platform used for truck transportation |
| CN105096088A (en) * | 2015-08-24 | 2015-11-25 | 无锡贺邦金属制品有限公司 | Management platform for truck transportation |
| CN105160938A (en) * | 2015-08-24 | 2015-12-16 | 无锡贺邦金属制品有限公司 | Management platform for transportation |
| CN105160916A (en) * | 2015-08-24 | 2015-12-16 | 无锡贺邦金属制品有限公司 | Management system for freight transportation |
| CN105160914A (en) * | 2015-08-24 | 2015-12-16 | 无锡贺邦金属制品有限公司 | Safety management system for freight transportation |
| CN105205631A (en) * | 2015-08-24 | 2015-12-30 | 无锡贺邦金属制品有限公司 | Safety management platform used for transportation |
| CN109272977A (en) * | 2018-10-25 | 2019-01-25 | 无锡十顶电子科技有限公司 | A kind of high-performance buzzer drive circuit |
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