CN201204438Y - Ignition failure protection device for vehicle-mounted terminal equipment - Google Patents
Ignition failure protection device for vehicle-mounted terminal equipment Download PDFInfo
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- CN201204438Y CN201204438Y CNU2008201117258U CN200820111725U CN201204438Y CN 201204438 Y CN201204438 Y CN 201204438Y CN U2008201117258 U CNU2008201117258 U CN U2008201117258U CN 200820111725 U CN200820111725 U CN 200820111725U CN 201204438 Y CN201204438 Y CN 201204438Y
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Abstract
The utility model relates to a vehicle-mounted electronic equipment, which is a vehicle-mounted end device ignition failure protection device, comprising an ADC module 1, a power supply transforming module 2, a main control unit 3, a controlled plant 4 and a display unit 5, wherein the power input is connected with the power supply transforming module 2, the output of the power supply transforming module 2 is sent to the ADC module 1 and the main control unit 3 respectively, the control signal outputted by the main control unit 3 is sent to the controlled plant 4 and the display unit 5 respectively. The utility model resolves ineffective problem of the prior vehicle-mounted electronic equipment when ignition, and the vehicle-mounted electronic equipment has advantages of simple structure, easy realization, low cost and high reliability. The utility model can be extensively applied to power supply failure process and reliability assurance of bad behavior equipment for vehicle-mounted equipment.
Description
Technical field
The utility model relates to a kind of vehicle electronic device.
Background technology
Car-mounted terminal equipment is the important applied field of automotive electronic technology.In recent years, along with the increase of automobile quantity, the rise of automotive electronics, the development of car-mounted terminal obtains very fast development.Simultaneously, along with the maturation of software and hardware resources and perfect, the application of embedded system has obtained swift and violent development, and its application relates to each each side such as communication, automation, information household appliances, military affairs.The wide application prospect of embedded system and development potentiality make it become one of the application focus in this century.Embedded system has strict requirement to indexs such as its function, reliability, cost, volume, power consumptions, and therefore selecting for use embedded system to develop vehicle mounted guidance terminal is one of selection feasible and that be fit to the most.The complete car-mounted terminal equipment of one cover involves many peripheral auxiliary devices, as radio reception head, DVD player core, digital audio process chip, LCD control chip, power amplifier chip or the like.These controlled plants to the requirement of input voltage than higher, usually between 8V～12V.And the working condition in the common automobile car is more abominable, and electromagnetic interference is comparatively serious.Particularly vehicle is in the moment of igniting, needs the high-power drive ignition system that comes, and will cause the decline suddenly of cell voltage like this, thereby causes the car-mounted terminal equipment work unstable even lost efficacy.
The utility model content
Technical problem to be solved in the utility model provides a kind of car-mounted terminal equipment cold run protective device of the inefficacy of mobile unit when eliminating vehicle ignition.
The technical scheme that the utility model adopted is:
Car-mounted terminal equipment cold run protective device comprises ADC module, power conversion module, main control unit, controlled plant, display unit, wherein:
The power supply input is connected with the power conversion module, and ADC module, main control unit are delivered in the output of power conversion module respectively, and main control unit output control signal is delivered to each controlled plant and display unit respectively.
The good effect that the utility model had is:
The inefficacy of mobile unit adopts single-chip microcomputer to carry the mode that ADC detects when utilizing ADC to eliminate vehicle ignition, has characteristics such as easy realization simple in structure, cost are low, reliability height.Can be widely used in the power-fail processing of mobile unit and the reliability of bad working environments equipment guarantees.Utilizing ADC to eliminate car-mounted terminal equipment is the ADC measuring ability that installs the ADC detection chip additional or utilize the main control chip of car-mounted terminal equipment to carry on common car-mounted terminal Equipment Foundations.ADC detect to be responsible for detects current input voltage, if the main control chip of car-mounted terminal equipment starts protection mechanism when voltage is lower than inefficacy voltage, the protection auxiliary device is not damaged.When ADC detected voltage and returns to normal level, main control chip recovered auxiliary device work again.Thereby guarantee that car-mounted terminal equipment is not influenced by change in voltage and can not damage hardware in the process that input voltage descends suddenly and rises.
The utility model has considered that not only electromagnetic interference or voltage descend to the influence of equipment, how also to consider the decision influence degree and disturb system resuming work to controlled plant later taken place.The scheme of mobile unit can be widely used in can not increasing the hardware and software cost of embedded device in the disturbed recovery of existing embedded device when utilizing ADC to eliminate vehicle ignition.In addition, in the higher occasion of some fail safes,, use ADC and eliminate that the recovery of equipment has good practical function when disturbed as the embedded instrumentation instrument etc.
Description of drawings
Fig. 1 is a functional-block diagram of the present utility model
Embodiment
" inefficacy of car-mounted terminal equipment when utilizing ADC to eliminate vehicle ignition " that this patent proposes be on common vehicle-mounted interrupting device basis in conjunction with the ADC technology, can well eliminate the destabilizing factor in the car-mounted terminal equipment work process.
As shown in Figure 1; car-mounted terminal equipment cold run protective device comprises ADC module 1, power conversion module 2, main control unit 3, controlled plant 4, display unit 5; the power supply input is connected with power conversion module 2; ADC module 1, main control unit 3 are delivered in the output of power conversion module 2 respectively, and main control unit 3 output control signals are delivered to each controlled plant 4 and display unit 5 respectively.
After system powers on, have power conversion module 2 that the 12V voltage transformation of input is become the required 9V～12V of the required 5V of main control unit 3 and peripheral facility 4, system starts working.Have ADC module 1 to detect the output voltage of power conversion module 2 at set intervals, the low pressure thresholding down trigger function setting low-voltage that perhaps can utilize Chip Microcomputer A C to provide triggers interrupts.When the output voltage values that detects power conversion module 2 when ADC module 1 was lower than the standard level that controlled plant 4 can operate as normal, ADC module 1 was low excessively to main control unit 3 report magnitudes of voltage, and peripheral facility 4 can't operate as normal.After main control unit 3 is received the report of ADC module 1, trigger the safeguard measure of controlled plant 4,, and on display unit 5, show current system because the brownout operation irregularity as the power supply of temporarily disconnected controlled plant 4.At this moment, whether the ADC module 1 uninterrupted output voltage that detects power conversion 2 returns to normal level, and the high pressure thresholding down trigger function setting high voltage that perhaps can utilize Chip Microcomputer A C to provide triggers and interrupts.When the output voltage values that detects power conversion module 2 when ADC module 1 returned to the standard level that controlled plant 4 can operate as normal, ADC module 1 was recovered to main control unit 3 report magnitudes of voltage, and controlled plant 4 can operate as normal.After main control unit 3 is received the report of ADC module 1, trigger the recovery measure of controlled plant 4, as reclose the power supply and the initialization controlled plant 4 of controlled plant 4, and on display unit 5, show current system restoration work.
The main control unit of native system is selected the STR750 microcontroller of STMicw Electronics (ST) for use, the STR750 microcontroller is based on high performance ARM7TDMI-S kernel, the RAM memory of the Flash memory of integrated 256+16K byte and 16K on the sheet has the I/O function of abundant peripheral hardware and enhancing.The performance power consumption of this controller is than very good, and the kernel support comprises Thumb instruction set, Fast Multiplication instruction and embedded ICE debugging technique.Because it is embedded ARM kernel, so compatible mutually with all ARM instrument and software.
The built-in 16 path 10 position ADC conversion of STR750, under the situation of maximum ADC work clock 8MHz, be 3.75 microseconds the blanking time of twice conversion, and the sampling time is 11 ADC clock cycle, and be 19 ADC clock cycle change-over time.In addition, STR750 supports 4 simulation house dogs to be provided with, and supports independently high threshold and low threshold triggering interruption.
LCD MODULE is selected MCG12864A8-3 for use, it is a kind of large-sized solor dot matrix (or diagram form) LCD, friendly interface, attractive in appearance, not only can character display, numeral, can also show various figures, curve and Chinese character, and can realize functions such as screen rolling up and down, animation, flicker, text feature demonstration, purposes is very extensive.This LCD MODULE is to use KS0108B and compatible Control Driver (for example HD61203B) thereof as row driver, uses KS0107B and compatible driver thereof (for example HD61203) Liquid Crystal Module as line driver simultaneously.Because KS0107B (or HD61203B) does not get in touch with MPU, so as long as provide power supply just can produce horizontal-drive signal and various synchronizing signal.Can directly control the control signal of LCD by universaling I/O port with single-chip microcomputer, simultaneously with a certain I/O mouth of single-chip microcomputer as its data/address bus.
Claims (1)
1, car-mounted terminal equipment cold run protective device comprises ADC module [1], power conversion module [2], main control unit [3], controlled plant [4], display unit [5], it is characterized in that:
The power supply input is connected with power conversion module [2], and ADC module [1], main control unit [3] are delivered in the output of power conversion module [2] respectively, and main control unit [3] output control signal is delivered to each controlled plant [4] and display unit [5] respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201117258U CN201204438Y (en) | 2008-05-16 | 2008-05-16 | Ignition failure protection device for vehicle-mounted terminal equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201117258U CN201204438Y (en) | 2008-05-16 | 2008-05-16 | Ignition failure protection device for vehicle-mounted terminal equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201204438Y true CN201204438Y (en) | 2009-03-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201117258U Expired - Lifetime CN201204438Y (en) | 2008-05-16 | 2008-05-16 | Ignition failure protection device for vehicle-mounted terminal equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201204438Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104572510A (en) * | 2013-10-09 | 2015-04-29 | 杰发科技（合肥）有限公司 | Method and device for judging working state of external equipment |
-
2008
- 2008-05-16 CN CNU2008201117258U patent/CN201204438Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104572510A (en) * | 2013-10-09 | 2015-04-29 | 杰发科技（合肥）有限公司 | Method and device for judging working state of external equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Wuhu Bo Rui Ruida Electronic Technology Co., Ltd. Assignor: No.38 Inst., China Electronic Sci. & Tech. Group Co. Contract record no.: 2012340000127 Denomination of utility model: Ignition failure protection device for vehicle-mounted terminal equipment Granted publication date: 20090304 License type: Common License Record date: 20120416 |
|
| EC01 | Cancellation of recordation of patent licensing contract |
Assignee: Wuhu Bo Rui Ruida Electronic Technology Co., Ltd. Assignor: No.38 Inst., China Electronic Sci. & Tech. Group Co. Contract record no.: 2012340000127 Date of cancellation: 20150319 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090304 |