CN102390268A - Vehicle speed alarm device - Google Patents
Vehicle speed alarm device Download PDFInfo
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- CN102390268A CN102390268A CN2011103108245A CN201110310824A CN102390268A CN 102390268 A CN102390268 A CN 102390268A CN 2011103108245 A CN2011103108245 A CN 2011103108245A CN 201110310824 A CN201110310824 A CN 201110310824A CN 102390268 A CN102390268 A CN 102390268A
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- main control
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- car speed
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Abstract
The invention provides a vehicle speed alarm device which is capable of effectively reminding a driver of adjusting the vehicle speed at road sections with different speed restrictions so as to improve the driving safety. The vehicle speed alarm device consists of a main control module, a vehicle speed sensor, an alarm module, a display module and a key circuit, wherein an electrical signal measured by the vehicle speed sensor is transmitted into a pin T1 of the main control module; a pin P2.7 of the main control module is connected with the base electrode of a triode of the alarm module, so that a loudspeaker arranged in the alarm module can be controlled to be on and off; a pin P1.6 and a pin P1.7 of the main control module are taken as anodes and are respectively connected with two light-emitting diodes (LEDs); the pin connection relationship between the main control module and the display module is as follows: a P2.0 is connected with a DIN, a P2.1 is connected with an LOAD, and a P2.2 is connected with a CLK; and the key circuit is connected with a P2.3, a P2.4, a P2.5 and a P2.6 of the main control module.
Description
Technical field
The present invention relates to a kind of warning device, a kind of car speed alarm device is provided.
Background technology
Along with the development of auto-industry and expressway construction, the annual personal casualty number that is caused by various traffic accidents is surprising, has caused enormous economic loss.According to statistics, the major cause that causes various traffic accidents is the overload of vehicle and drives over the speed limit, and latter's randomness is very big; Entangle the chapter difficulty; And because Chinese Highway Conditions is complicated, the maximum speed that the highway of different brackets allows is different, and existing speed-limit device is difficult to adapt to this situation.Along with the design at full speed of science and technology is development; In order to overcome the shortcoming that traditional analog speed of a motor vehicle display instrument shows that number is inaccurate and do not have overspeed alarm; Digital instrumentation gets into the auto meter industry rapidly; Become a kind of trend, this paper has designed a kind of warning that detects overspeed of vehicle from chaufeur inherently safe angle.
Summary of the invention
The object of the present invention is to provide a kind of car speed alarm device
.
For realizing that above-mentioned purpose the present invention adopts technical scheme:
A kind of car speed alarm device, its composition comprise main control module, car speed sensor, alarm module, display module, key circuit composition, and it is characterized in that: the telecommunications that car speed sensor records transmits the T1 pin of a main control module; The P2.7 pin of main control module is connected with the base stage of the aerotron of alarm module, the break-make of loud speaker in the control alarm module, and P1.6, P1.7 pin pick out 2 light-emitting diodes as the anode branch; Pin in main control module and the display module is connected to P2.0 and connects that DIN, P2.1 meet LOAD, P2.2 meets CLK; Key circuit is connected with the P2.3-P2.6 of main control module.
Said car speed sensor is made up of Hall switch, magnet.
Said alarm module connects and draws resistance R 2, and transistor and loud speaker constitute, and light warning is made up of two light-emitting diodes.
Said display module MAX7219 chip and 2 common cathode charactrons constitute.
Said key circuit adds by switch S B1, SB2, SB3, SB4 and draws resistance R 3, R4, R5, R6 to constitute, and SB1 is that speed setting, SB2S speed increase, SB3 is that to reduce SB4 be that speed is confirmed to speed.
Description of drawings
Fig. 1 is a system chart of the present invention;
Fig. 2 is a systematic schematic diagram of the present invention.
The specific embodiment
A kind of car speed alarm device, its composition comprise main control module, car speed sensor, alarm module, display module, key circuit composition, and it is characterized in that: the telecommunications that car speed sensor records transmits the T1 pin of a main control module; The P2.7 pin of main control module is connected with the base stage of the aerotron of alarm module, the break-make of loud speaker in the control alarm module, and P1.6, P1.7 pin pick out 2 light-emitting diodes as the anode branch; Pin in main control module and the display module is connected to P2.0 and connects that DIN, P2.1 meet LOAD, P2.2 meets CLK; Key circuit is connected with the P2.3-P2.6 of main control module.
Main control module
8051 micro controller systems that adopt MCS one 51 series are as the control core.8051 anti-interference resistances are good, are applicable to the occasion of harsh environment.The frequency of operation of 8051 CPU adopts 12MHZ, makes things convenient for system that the count pulse of speed sensor is carried out the fast speed processing.The input of 805l, output pin have 32 I/O mouth lines.Can connected storage, various external devices such as light-emitting diode display, speed sensor.8051 have the characteristics of low-power consumption and low voltage operating pattern, can utilize battery that system is supplied power.But 8051 inside have only the data memory of 256B, system can external RAM chip to satisfy the demand of system.
Car speed sensor
Tachogenerator is made up of Hall switch, magnet. and its principle of work foot is installed in Hall switch and magnet respectively the appropriate location of vehicle frame, wheel; During vehicle '; Under the effect of magnet, the defeated people of the on-off signal that Hall switch produces is to the counting machine T1 pin of micro controller system.The timer of 805l is after 0 timing section time.Extract the pulse number among the Tl.Just can calculate the momentary velocity that goes of vehicle.
Warning circuit
Alarm module is responsible for audible alarm and light warning, and warning circuit is all fairly simple, and audible alarm is connected by micro controller system pin P2.7 and draws resistance R 2, and transistor and loud speaker constitute, and light warning is made up of two light-emitting diodes.
Display circuit
Display circuit is accomplished by the MAX7219 chip, and MAX7219 is a kind of common cathode LED display driver of highly integrated serial I/O.Every can drive 8 the 7 sections common cathode charactrons that add arithmetic point.SEGA ~ SEGG (arriving G for A among the figure) is a LED seven-segment display section drive end, and SEGDP is the arithmetic point drive end; (SEGA ~ SEGG, the outgoing current of 7 sections of DP driving displays and arithmetic point is generally about 40 mA, but the software adjustment during closed condition, inserts GND.) DIG7 ~ DIG0:8 bit value drive wire.Carry out bit selects signal, sucks electric current from each LED common cathode, absorbs the position drive wire of telltale common cathode electric current.Its maxim can reach 500 mA, during closed condition, and output+VCC.MAX7219 is connected with the LED charactron.
Key circuit
Said key circuit adds by switch S B1, SB2, SB3, SB4 and draws resistance R 3, R4, R5, R6 to constitute, and SB1 is that speed setting, SB2S speed increase, SB3 is that to reduce SB4 be that speed is confirmed to speed.Operation through to switch can be carried out setting operation to the speed limit value, because the fluctuation of speed button is arranged in addition, can change to reach the warning purpose according to the real-time on-site speed that requires to carry out of chaufeur easily, has very strong flexibility of operation.
The MAX7219 that the present invention adopts is the common cathode LED driving display of a highly integrated serial I/O, and every can drive 8 the 7 sections common cathode charactrons that add arithmetic point, can several pieces cascades; And with need 3 lines only being connected of microprocessor, and speed setting only need realize getting final product through several buttons, and increase and decrease that can the real-time implementation speed limit; Thereby hardware circuit is simple; Human eye vision is effective, can be easy to realize safeguarding easily for chaufeur provides information; And MAX7219 inside is provided with scanning circuit; From micro controller system receives data, work alone at ordinary times during except the update displayed data, greatly saved limited time of run and the program resource of MCU.
Claims (5)
1. car speed alarm device, its composition comprise that main control module, car speed sensor, alarm module, display module, key circuit form, and it is characterized in that: the telecommunications that car speed sensor records transmits the T1 pin of a main control module; The P2.7 pin of main control module is connected with the base stage of the aerotron of alarm module, the break-make of loud speaker in the control alarm module, and the P1.6 of main control module, P1.7 pin pick out 2 light-emitting diodes as the anode branch; Pin annexation in main control module and the display module is that P2.0 connects that DIN, P2.1 meet LOAD, P2.2 meets CLK; Key circuit is connected with the P2.3-P2.6 of main control module.
2. car speed alarm device according to claim 1 is characterized in that: said car speed sensor is made up of Hall switch, magnet.
3. car speed alarm device according to claim 1 is characterized in that: said alarm module connects and draws resistance R 2, and triode and loud speaker constitute, and light warning is made up of two light-emitting diodes.
4. car speed alarm device according to claim 1 is characterized in that: said display module MAX7219 chip and 2 common cathode charactrons constitute.
5. car speed alarm device according to claim 1 is characterized in that: said key circuit is added by switch S B1, SB2, SB3, SB4 and draws resistance R 3, R4, R5, R6 to constitute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103108245A CN102390268A (en) | 2011-10-14 | 2011-10-14 | Vehicle speed alarm device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103108245A CN102390268A (en) | 2011-10-14 | 2011-10-14 | Vehicle speed alarm device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102390268A true CN102390268A (en) | 2012-03-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103108245A Pending CN102390268A (en) | 2011-10-14 | 2011-10-14 | Vehicle speed alarm device |
Country Status (1)
| Country | Link |
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| CN (1) | CN102390268A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108454404A (en) * | 2018-02-11 | 2018-08-28 | 周丰 | A kind of automobile multiple speed warning device and its method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5455923A (en) * | 1977-10-07 | 1979-05-04 | Nippon Denso Co Ltd | Method of and apparatus for safety control of vehicle at the time of travelling along curved road |
| JPS60215432A (en) * | 1984-04-11 | 1985-10-28 | Nissan Motor Co Ltd | Control device for running of vehicle |
| JPS6116138A (en) * | 1984-06-29 | 1986-01-24 | Jidosha Denki Kogyo Co Ltd | Automatic vehicle speed control device |
| JPS62131828A (en) * | 1985-12-04 | 1987-06-15 | Mazda Motor Corp | Constant speed driving device for automobile |
| CN202243021U (en) * | 2011-10-14 | 2012-05-30 | 成都市翻鑫家科技有限公司 | Vehicle speed alarming device |
-
2011
- 2011-10-14 CN CN2011103108245A patent/CN102390268A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5455923A (en) * | 1977-10-07 | 1979-05-04 | Nippon Denso Co Ltd | Method of and apparatus for safety control of vehicle at the time of travelling along curved road |
| JPS60215432A (en) * | 1984-04-11 | 1985-10-28 | Nissan Motor Co Ltd | Control device for running of vehicle |
| JPS6116138A (en) * | 1984-06-29 | 1986-01-24 | Jidosha Denki Kogyo Co Ltd | Automatic vehicle speed control device |
| JPS62131828A (en) * | 1985-12-04 | 1987-06-15 | Mazda Motor Corp | Constant speed driving device for automobile |
| CN202243021U (en) * | 2011-10-14 | 2012-05-30 | 成都市翻鑫家科技有限公司 | Vehicle speed alarming device |
Non-Patent Citations (1)
| Title |
|---|
| YUANLAIWOSHIGO: "单片机车速报警器", 《百度文库》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108454404A (en) * | 2018-02-11 | 2018-08-28 | 周丰 | A kind of automobile multiple speed warning device and its method |
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Application publication date: 20120328 |