CN103407404A

CN103407404A - New energy automobile approach alarming system and new energy automobile approach alarming method

Info

Publication number: CN103407404A
Application number: CN201310334612XA
Authority: CN
Inventors: 闵锐
Original assignee: WUHAN BAOHUA DISPLAY TECHNOLOGY Co Ltd
Current assignee: WUHAN BAOHUA DISPLAY TECHNOLOGY Co Ltd
Priority date: 2013-08-02
Filing date: 2013-08-02
Publication date: 2013-11-27

Abstract

The invention discloses a new energy automobile approach alarming system and a new energy automobile approach alarming method. The system comprises a main controller, an audio chip, a storage and an alarming loudspeaker, the main controller is connected with the audio chip through an SPI (serial peripherical interface) communication protocol, the storage is connected with the audio chip through an SPI communication protocol, and the audio chip is connected with the alarming loudspeaker. The new energy automobile approach alarming system is simple in structure, safety when a new energy automobile travels at a low speed is greatly improved, automobile accident rate is lowered by more than 90%, and pedestrian safety is protected well; no big change is needed for an electrical system of the automobile, and the new energy automobile approach alarming system can be integrated with an instrument system well; the special audio chip of YAMAHA is selected and used, so that quite diverse sounds can be given out to meet requirements of different main engine plants and different automobile types.

Description

New-energy automobile approach warning system and alarm method thereof

Technical field

The present invention relates to the new-energy automobile technical field, be specially a kind of new-energy automobile approach warning system and alarm method thereof.

Background technology

New-energy automobile is the driving engine of power owing to not adopting traditional gasoline or diesel oil, the sound sent in traveling process is very little, at low speed when near pedestrian or other vehicles, passing through, can't cause that the other side notes, the generation that is easy to result in an automobile accident, bring great potential safety hazard to pedestrian and other vehicles.

Summary of the invention

The objective of the invention is in order to overcome above-mentioned the deficiencies in the prior art part, and provide a kind of simple in structure, when the speed of a motor vehicle is the lower-speed state below 40KM/H, variation along with the speed of a motor vehicle, can initiatively send the high-decibel sound signal of variation, new-energy automobile approach warning system and alarm method thereof that passing pedestrian and vehicle are warned.

The objective of the invention is to reach by following measure: the new-energy automobile approach warning system comprises master controller, audio chip, memory device and alarming horn, described master controller is connected with audio chip by SPI communication protocol, described memory device is connected with audio chip by SPI communication protocol, and described audio chip is connected with alarming horn.

New-energy automobile proximity sensing method comprises the following steps: deposit the different corresponding voice datas of data of controlling in memory device; Microprocessor is accessed to Vehicle Body Bus, and microprocessor gathers the ACC signal of automobile ignition switch, and when the ACC of ignition lock signal was effective, system started and enters mode of operation, when the ACC of ignition lock invalidating signal, and system closing; The system startup enters mode of operation, and microprocessor gathers the car speed data-signal, calculates velocity amplitude; To calculate velocity amplitude and be sent to audio chip by SPI communication protocol; Audio chip is according to the control data that receive, from the voice data of transferring corresponding frequencies and loudness memory device and drive alarming horn and send alarm sound.

The present invention is simple in structure, has promoted greatly the safety when new-energy automobile low speed is advanced, and has reduced the car accident incidence and has reached more than 90%, has well protected pedestrains safety; Without large change, and system can well be integrated with meter system to vehicle electrical systems; The special audio chip that system has been selected YAMAHA, can send very various sound, to meet different main engine plants, the demand of different automobile types.

The accompanying drawing explanation

Fig. 1 is new-energy automobile approach warning system structural representation of the present invention.

Fig. 2 is automotive speed sensor vehicle speed pulse signal schematic representation.

1. master controllers in figure, 2. audio chip, 3. memory device, 4. alarming horn.

The specific embodiment

Below in conjunction with accompanying drawing, describe performance of the present invention in detail, but they do not form limitation of the invention, only for example, simultaneously by illustrating that advantage of the present invention will become more clear and easily understand.

Consult accompanying drawing as can be known: new-energy automobile approach warning system of the present invention, it comprises master controller 1, audio chip 2, memory device 3 and alarming horn 4, described master controller 1 is connected with audio chip 2 by SPI communication protocol, described memory device 3 is connected with audio chip 2 by SPI communication protocol, and described audio chip 2 is connected with alarming horn 4.Described master controller 1 is microprocessor 11, and described master controller 1 also can be selected existing automobile combination meter 12.Described audio chip 2 is the YMF family chip of YAMAHA company, and described memory device 3 is selected SPI Flash, for example the SPI Flash of M25Pxx series.

New-energy automobile proximity sensing method of the present invention comprises the following steps: deposit the different corresponding voice datas of data of controlling in memory device, microprocessor is accessed to Vehicle Body Bus by the communication transceiver of supporting CAN2.0B, support the communication transceiver of CAN2.0B can select the models such as TJA1040 or TJA1041, microprocessor gathers the ACC signal of automobile ignition switch according to the predetermined message of main engine plants, when the ACC of ignition lock signal is effective, the system startup enters mode of operation, when the ACC of ignition lock invalidating signal, system closing, when the ACC of ignition lock signal is effective, microprocessor CAN network or automotive speed sensor pulse collection speed data signal, for example, when the speed of a motor vehicle is S km/h, the impulse singla peak voltage that automotive speed sensor sends is 12V, high-low level ratio 1:1, pass through level shifting circuit, level is reduced to 5V, enter microprocessor, the microprocessor paired pulses carries out stored counts, this numerical value is designated as p, every 500ms calculates once, be converted into pulse count hourly, be designated as P, P=p * 7200, then by the p zero clearing, because different car speed sensor, it is different that all car speed sensors of rotation of wheel one send pulse count, so suppose one week of rotation of wheel, car speed sensor sends t pulse, the wheel overall diameter is d, thus, calculate speed of a motor vehicle S=(* (PI * d) of P/t), wherein PI is the circular constant parameter, the speed data signal collected is sent to the corresponding control data of speed data signal by SPI communication protocol to audio chip, audio chip is according to the control data that receive, from the voice data of transferring corresponding frequencies and loudness memory device and drive alarming horn and send alarm sound.When speed is less than 40Km/h, along with speed improves, the rising in direct ratio of warning decibel value, when speed reached 40Km/h, the system alarm sound progressively stopped with the form of fading out.

When system exists as the add-on module of automobile combination meter, use the MCU of automobile combination meter as master control, same, by the SPI agreement, to communicate by letter with audio chip, the audio frequency processing of whole system and warning working process are as hereinbefore.

Above-described embodiment is preferably embodiment of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under Spirit Essence of the present invention and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection scope of the present invention.

Claims

1. new-energy automobile approach warning system, it is characterized in that: comprise master controller (1), audio chip (2), memory device (3) and alarming horn (4), described master controller (1) is connected with audio chip (2) by SPI communication protocol, described memory device (3) is connected with audio chip (2) by SPI communication protocol, and described audio chip (2) is connected with alarming horn (4).

2. new-energy automobile approach warning system according to claim 1, is characterized in that described master controller (1) is microprocessor.

3. new-energy automobile approach warning system according to claim 1, is characterized in that described master controller (1) is automobile combination meter.

4. according to the described new-energy automobile approach warning system of any one in claims 1 to 3, it is characterized in that described audio chip (2) is the YMF family chip of YAMAHA company.

5. according to the described new-energy automobile approach warning system of any one in claims 1 to 3, it is characterized in that described memory device (3) is SPI Flash.

6. new-energy automobile approach warning system according to claim 2, its alarm method comprises the following steps:

In memory device, deposit the different corresponding voice datas of data of controlling in;

Microprocessor is accessed to Vehicle Body Bus, and microprocessor gathers the ACC signal of automobile ignition switch, and when the ACC of ignition lock signal was effective, system started and enters mode of operation, when the ACC of ignition lock invalidating signal, and system closing;

The system startup enters mode of operation, and microprocessor gathers the car speed data-signal, calculates velocity amplitude;

To calculate velocity amplitude and be sent to audio chip by SPI communication protocol;

Audio chip is according to the control data that receive, from the voice data of transferring corresponding frequencies and loudness memory device and drive alarming horn and send alarm sound.

7. new-energy automobile proximity sensing method according to claim 6, is characterized in that described microprocessor is by CAN network or Negotiation speed sensor pulse acquisition speed data-signal.

8. new-energy automobile proximity sensing method according to claim 6, it is characterized in that described velocity amplitude is according to S=(P/t) * (PI * d) calculates, and wherein S is that the speed of a motor vehicle, P are that automotive speed sensor pulse count hourly, t are that all car speed sensors of rotation of wheel one send pulse count, PI is that circular constant parameter and d are the wheel overall diameter.