CN202389219U - Multifunctional liquid crystal combination instrument - Google Patents
Multifunctional liquid crystal combination instrument Download PDFInfo
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- CN202389219U CN202389219U CN2011204912696U CN201120491269U CN202389219U CN 202389219 U CN202389219 U CN 202389219U CN 2011204912696 U CN2011204912696 U CN 2011204912696U CN 201120491269 U CN201120491269 U CN 201120491269U CN 202389219 U CN202389219 U CN 202389219U
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- liquid crystal
- crystal combination
- microcontroller
- combination instrument
- functional liquid
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Abstract
The utility model relates to an instrument for a vehicle. A multifunctional liquid crystal combination instrument provided by the utility model can well solve the problems in prior art of single function and large occupied space, low reliability and precision of the traditional instrument caused by friction and loss on instrument machinery, and easiness in error generation due to a vision angle in a number reading process. According to the main points in the technical scheme, a vehicle storage battery supplies power to the multifunctional liquid crystal combination instrument through a power supply converter; the multifunctional liquid crystal combination instrument comprises at least one display screen and a microcontroller; the multifunctional liquid crystal combination instrument further comprises a display screen driver; a liquid crystal display screen is used; the microcontroller is electrically connected with the display screen through the display screen driver; and the microcontroller is electrically connected with a vehicle communication bus through a communication bus port. The multifunctional liquid crystal combination instrument provided by the utility model has the advantages of rich functions, high reliability, high precision, good visibility, strong generality, storage function, no mechanical abrasion and long service life.
Description
Technical field
The utility model relates to a kind of vehicle and uses instrument, particularly a kind of liquid crystal combination instrument with multiple function, a large amount of information of vehicles of digital display.
Background technology
Auto meter is the window and the interface of carrying out information interchange between driver and the automobile; For improving auto meter service life, safety and economy run positive and important effect is arranged; Along with the fast development of vehicle electronics up-to-date technology, the quantity of information that need on instrument, show is more and more.And the oldfashioned instrument is main with the pointer form; Function singleness, need take bigger space; Simultaneously owing to cause oldfashioned Meter Reliability and precision also not high in instrument friction and loss mechanically; When numeral reads because the visual angle problem also is easy to generate error, need urgently on the therefore present vehicle a kind of have enrich function, reliability is high, precision is high, visuality good, the instrument of highly versatile, long service life.
Chinese patent notification number CN1247626A; At on 03 15th, 2000 day for announcing, a kind of instrument carrier panel is disclosed, the telltale in particularly a kind of self-propelled vehicle; It has a stratiform carrier; Scribble color on it, be used to represent scale and/or characteristic and/or symbol and cover the zone outside scale, characteristic or the symbol profile, the color of said scale, characteristic or symbol comprises the multilayer system that formed by all or part of transparent color layer that has different color to distribute that covers each other of multilayer.Though this technical scheme can be through the setting of color; Auxiliary user distinguishes whether the numeral that shows on the present instrument is to exceed normal level; But this technical scheme still is the oldfashioned instrument, still has function singleness, need take bigger space; Simultaneously owing to cause oldfashioned Meter Reliability and precision also not high, when reading, numeral also is easy to generate the problem of error owing to the visual angle problem in instrument friction and loss mechanically.
The utility model content
The purpose of the utility model is to solve and has function singleness in the above-mentioned prior art, need take bigger space; Simultaneously owing to cause oldfashioned Meter Reliability and precision also not high in instrument friction and loss mechanically; When numeral reads because the visual angle problem also is easy to generate the problem of error, provide a kind of have enrich function, reliability is high, precision is high, visuality good, the instrument of highly versatile, long service life.
The utility model solves the technical scheme that its technical matters adopted: a kind of multi-functional liquid crystal combination instrument; Supply power through power supply changeover device by automotive battery; Comprise at least one read-out and microcontroller; Described multi-functional liquid crystal combination instrument also includes display driver; Described read-out is a LCDs, and described microcontroller is electrically connected with described read-out through display driver, and described microcontroller is electrically connected with vehicle communication bus through communication bus interface.Be provided with like this; The utility model can comprise engine information and change-speed box data lot of data at a less screen display through the switching of read-out; Simultaneously; What the utility model adopted is digitized display mode; So the utility model do not have that error that visual angle causes exists and digitized display mode has also solved the intrinsic mechanical wear of mechanical type instrument, the various weak points such as error of mechanical type, reach the goal of the invention of high, visual good, the highly versatile of display data reliability, long service life.
As preferably, described communication bus interface is the CAN EBI.The CAN bus protocol has become the STD bus of Computer Controlled System for Vehicle and built-in industrial control area net, technology maturation, and applicability is wide, so adopt the CAN EBI to carry out communication with the CAN bus better.
As preferably, described multi-functional liquid crystal combination instrument also includes eeprom chip, and microcontroller is electrically connected with described eeprom chip.Eeprom chip is a PROM Programmable Read Only Memory, has the effect of long-time preservation data, in instrument, is used to preserve sub-mileage, total kilometrage data and current vehicle condition; And data can not disappear when guaranteeing power down, play the effect of automobile " black box ", for example the three-way serial electrically erasable programmable ROM of 93LCA6B type; Its capacity is 1k * 16; Erase cycle 1M time, display speed 2ms, data hold time were longer than 40 years.
As preferably, described multi-functional liquid crystal combination instrument also includes signal conditioning circuit, car speed sensor and tachogen, and described microcontroller is electrically connected with car speed sensor and tachogen through signal conditioning circuit.Be provided with like this, guaranteed that microcontroller can receive the signal of car speed sensor and tachogen through modulate circuit, microcontroller can convert this signal into digital signal and export read-out output demonstration to then.
As preferably, described car speed sensor is the photo-electric car speed sensor, and described tachogen is an impulse singla formula tachometer generator.Adopt the measurement sensitive member of digital element like this as the speed of a motor vehicle and rotating speed; The input and output pin that has guaranteed microcontroller can be connected the signal that the mode that reads number of pulses receives car speed sensor and tachogen, and the output of this signal output to read-out is shown.
As preferably; Described multi-functional liquid crystal combination instrument also includes the temperature sensor of signal conditioning circuit, detection of engine temperature and detects the level sensor of fuel tank fuel quantity, and the analog signal data of described microcontroller is gathered pin and is electrically connected with temperature sensor and level sensor through signal conditioning circuit.Be provided with like this, guaranteed that microcontroller can receive the signal of temperature sensor and level sensor through modulate circuit, microcontroller can convert this signal into digital signal and export read-out output demonstration to then.
As preferably, described temperature sensor is a thermistor temperature sensor, and described level sensor is the variable resistance type level sensor.Temperature sensor and level sensor have adopted the sensor of analog quantity element; So; The practical analog signal data of microcontroller is gathered the analog signals of pin through modulate circuit collecting temperature and liquid level, and microcontroller converts analog signals into digital quantity and exports read-out output demonstration to.
As preferably, described multi-functional liquid crystal combination instrument also includes speech chip and rattler, and described microcontroller is electrically connected with described rattler through speech chip.Through such setting, can output signal to speech chip by microcontroller, the control rattler carries out audio alert, reaches the effect of additional alarm.
As preferably, described microcontroller is electrically connected with the control button and the watchdog reset chip of switching displayed information.Be provided with like this; Improved the reliability of the utility model; Effectively prevented the situation of program fleet through the watchdog reset chip, and the setting of control button, made that the user can be according to the data of needs switching displayed of oneself; Guaranteed on a read-out, to show the present user information of needs the most effectively, guaranteed practicality of information.
As preferably; Described read-out comprises first read-out and second read-out; Described display driver comprises first display driver and second display driver; Said microcontroller is electrically connected with first read-out through first display driver, and said microcontroller is electrically connected with second read-out through second display driver.Be provided with like this, two read-outs can show different information respectively, and can be separately positioned on the original position of machinery instrument, can not change user's driving habit, and the user can adapt to the utility model rapidly.
The beneficial effect of the utility model is: the utlity model has that feature richness, reliability are high, precision is high, visuality good, highly versatile and memory function is arranged, do not have that machinery weares and teares, the advantage of long service life.
Description of drawings
Fig. 1 is a kind of circuit block diagram of the utility model.
Among the figure: 1, microcontroller, 2, eeprom chip, 3, control unit of engine, 4, transmission control unit, 5, speech chip; 6, first display driver, 7, second display driver, 8, first read-out, 9, second read-out, 10, first modulate circuit; 11, photo-electric car speed sensor, 12, second modulate circuit, 13, impulse singla formula tachometer generator, the 14, the 3rd modulate circuit; 15, thermistor temperature sensor, the 16, the 4th modulate circuit, 17, the variable resistance type level sensor, 18, control button; 19, reset switch, 20, the watchdog reset chip, 21, power supply changeover device, 22, rattler.
The specific embodiment
Below through specific embodiment, and combine accompanying drawing, the technical scheme of the utility model is further specified.
Embodiment:
A kind of multi-functional liquid crystal combination instrument (referring to accompanying drawing 1); Supply power through power supply changeover device 21 by automotive battery; Power supply changeover device 21 is with original 12V storage battery power supply voltage output 5V and the direct current of voltage regulation of 32V and the voltage stabilizing alternating current of 4.2V on the automobile; Become the needed three kinds of operating voltages of car intelligence combined meter: promptly microcontroller, language chip, signal conditioning circuit required+5V voltage, the 32V voltage that the anode of VFD read-out and grid are required and be used for the power supply of VFD read-out filament exchange 4.2V voltage; Multi-functional liquid crystal combination instrument comprises rattler 22, microcontroller 1, eeprom chip 2, speech chip 5, first display driver 6, second display driver 7, first read-out 8 and second read-out 9; Microcontroller 1 adopts the PIC16C72A chip, and it is program store, the data memory of 128X8 position and the 8-bit microprocessor of 3 timers that has 14 of 85 passage A/D converters, 4kX.Microcontroller 1 is electrically connected with eeprom chip 2, and eeprom chip 2 adopts the three-way serial electrically erasable programmable ROM of 93LCA6B types, and its capacity is 1k * 16, erase cycle 1M time, and display speed 2ms, data hold time were longer than 40 years.Microcontroller 1 is electrically connected with rattler 22 through speech chip 5; Microcontroller 1 drives first read-out 8 through first display driver 6; Microcontroller 1 drives second read-out 9 through second display driver 7; First display driver 6 and second display driver 7 all adopt μ PD16311 chip; First read-out 8 and second read-out 9 all adopt the VFD read-out, and first read-out 8 is used for showing engine speed and total kilometrage information, and second read-out 9 is used for showing the speed of a motor vehicle, water temperature, oil mass, sub-mileage.Microcontroller 1 is electrically connected with the CAN communication bus through the CAN EBI, and control unit of engine 3 transfers to microcontroller 1 through the CAN communication bus with engine signal and change-speed box signal with transmission control unit 4.Multi-functional liquid crystal combination instrument also includes first modulate circuit 10, photo-electric car speed sensor 11, second modulate circuit 12, impulse singla formula tachometer generator 13, the 3rd modulate circuit 14, thermistor temperature sensor 15, the 4th modulate circuit 16 and variable resistance type level sensor 17.First input and output pin of microcontroller 1 is electrically connected with photo-electric car speed sensor 11 through first signal conditioning circuit 10; Second input and output pin of microcontroller 1 is electrically connected with impulse singla formula tachometer generator 13 through second modulate circuit 12, and first signal conditioning circuit 10 and second modulate circuit 12 are signal shaping clamper/limiter circuit.First analog signal data of microcontroller 1 is gathered pin and is electrically connected with thermistor temperature sensor 15 through the 3rd modulate circuit 14, and second analog signal data of microcontroller 1 is gathered pin and is electrically connected with variable resistance type level sensor 17 through the 4th modulate circuit 16.Microcontroller 1 also is electrically connected control button 18 and watchdog reset chip 20, and watchdog reset chip 20 is electrically connected with the reset terminal of microcontroller 1 through reset switch 19.
When present embodiment uses; Microcontroller 1 is accomplished the processing to four software timers through the system clock program, the functions such as setting of the setting of realization time sampling time, the sub-mileage/setting of running time zero clearing timer, the setting of multi-functional demonstration time timer, warning intervalometer; Microcontroller 1 is through data acquisition program, data processor; Accomplish respectively the reading of control unit of engine 3, transmission control unit 4, photo-electric car speed sensor 11, impulse singla formula tachometer generator 13, thermistor temperature sensor 15 and variable resistance type level sensor 17 data, accomplish calculating for collection, digital filter and other various numerical value of the speed of a motor vehicle, engine speed impulse singla and water temperature, fuel level sensor analog signal; Microcontroller 1 is through the function of key/switch handler completion to switching, sub-mileage and the zero clearing of sub-mileage running time of the displaying contents of first read-out 6 and second read-out 7; Microcontroller 1 is accomplished the function to the simulation light beam demonstration of engine speed, water temperature and oil mass and the speed of a motor vehicle, total kilometrage, sub-mileage, running time, the surplus isoparametric numeric display of oily travelled distance through display routine.
The user carries out function selecting through pressing control button 18, and it has two effects: the first, switch the content of first read-out 6 and second read-out 7; Can be for showing sub-mileage (km), sub-mileage running time (time, branch) and surplus 3 contents of oily travelled distance (km); Default displaying contents is sub-mileage, the second, and antithetical phrase mileage and the zero clearing of sub-mileage running time; The time that pushes button surpasses 3s, i.e. antithetical phrase mileage and the zero clearing of sub-mileage running time.When measurement parameters such as the speed of a motor vehicle, engine speed, water temperature and oil mass transfinited, speech chip 5 carried out voice prompt alarm when present embodiment used.
Above-described embodiment is a kind of preferable scheme of the utility model, is not the utility model is done any pro forma restriction, under the prerequisite that does not exceed the technical scheme that claim puts down in writing, also has other variant and remodeling.
Claims (10)
1. multi-functional liquid crystal combination instrument; Supply power through power supply changeover device (21) by automotive battery; Comprise at least one read-out and microcontroller (1), it is characterized in that: described multi-functional liquid crystal combination instrument also includes display driver, and described read-out is a LCDs; Described microcontroller (1) is electrically connected with described read-out through display driver, and described microcontroller (1) is electrically connected with vehicle communication bus through communication bus interface.
2. multi-functional liquid crystal combination instrument according to claim 1 is characterized in that: described communication bus interface is the CAN EBI.
3. multi-functional liquid crystal combination instrument according to claim 1 and 2 is characterized in that: described multi-functional liquid crystal combination instrument also includes eeprom chip (7), and microcontroller (1) is electrically connected with described eeprom chip (7).
4. multi-functional liquid crystal combination instrument according to claim 1 and 2; It is characterized in that: described multi-functional liquid crystal combination instrument also includes signal conditioning circuit, car speed sensor and tachogen, and described microcontroller is electrically connected with car speed sensor and tachogen through signal conditioning circuit.
5. multi-functional liquid crystal combination instrument according to claim 4 is characterized in that: described car speed sensor is photo-electric car speed sensor (11), and described tachogen is an impulse singla formula tachometer generator (13).
6. multi-functional liquid crystal combination instrument according to claim 1 and 2; It is characterized in that: described multi-functional liquid crystal combination instrument also includes the temperature sensor of signal conditioning circuit, detection of engine temperature and detects the level sensor of fuel tank fuel quantity, and the analog signal data of described microcontroller is gathered pin and is electrically connected with temperature sensor and level sensor through signal conditioning circuit.
7. multi-functional liquid crystal combination instrument according to claim 6 is characterized in that: described temperature sensor is thermistor temperature sensor (15), and described level sensor is variable resistance type level sensor (17).
8. multi-functional liquid crystal combination instrument according to claim 1; It is characterized in that: described multi-functional liquid crystal combination instrument also includes speech chip (5) and rattler (22), and described microcontroller (1) is electrically connected with described rattler (22) through speech chip (5).
9. according to claim 1 or 2 or 8 described multi-functional liquid crystal combination instruments, it is characterized in that: described microcontroller (1) is electrically connected with the control button (18) and the watchdog reset chip (20) of switching displayed information.
10. according to claim 1 or 2 or 8 described multi-functional liquid crystal combination instruments; It is characterized in that: described read-out comprises first read-out (8) and second read-out (9); Described display driver comprises first display driver (6) and second display driver (7); Said microcontroller (1) is electrically connected with first read-out (8) through first display driver (6), and said microcontroller (1) is electrically connected with second read-out (9) through second display driver (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204912696U CN202389219U (en) | 2011-12-01 | 2011-12-01 | Multifunctional liquid crystal combination instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204912696U CN202389219U (en) | 2011-12-01 | 2011-12-01 | Multifunctional liquid crystal combination instrument |
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| Publication Number | Publication Date |
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| CN202389219U true CN202389219U (en) | 2012-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011204912696U Expired - Fee Related CN202389219U (en) | 2011-12-01 | 2011-12-01 | Multifunctional liquid crystal combination instrument |
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| CN (1) | CN202389219U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104385921A (en) * | 2014-11-19 | 2015-03-04 | 吕冬芳 | Automobile instrument full-liquid-crystal dynamic display device |
| CN115576512A (en) * | 2022-10-24 | 2023-01-06 | 威海市天罡仪表股份有限公司 | Electronic display device for simulating mechanical display and data storage method thereof |
-
2011
- 2011-12-01 CN CN2011204912696U patent/CN202389219U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104385921A (en) * | 2014-11-19 | 2015-03-04 | 吕冬芳 | Automobile instrument full-liquid-crystal dynamic display device |
| CN115576512A (en) * | 2022-10-24 | 2023-01-06 | 威海市天罡仪表股份有限公司 | Electronic display device for simulating mechanical display and data storage method thereof |
| CN115576512B (en) * | 2022-10-24 | 2023-07-25 | 威海市天罡仪表股份有限公司 | Electronic display device simulating mechanical display and data storage method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120822 Termination date: 20131201 |