1 S11-5305010 DASHBOARD SET 2 S11YBB-FYBBZC DASHBOARD SET SUB 3 S11-5305421 PANEL DECORATION 4 S11-5301300 DASHBOARD LOWER INSTALLATION BRACKET 5 S11-5305923 SECONDARY DASHBOARD COVER PLATE 6 S11-5305930 BODY,MINOR DASHBOARD 7 S11-5305790 BOX SET GROVE 8 S11-5305065 COPILOT SEAT TRIMING CAP 9 S11-5305210 DOUBLE-END AIR OUTLET ASSY 10 Q1860816 SCREW SET 11 S11-5305041 DUCT BASE BODY 12 S11YBB-HL CROSS MEMBER,STABILIZER-DASHBOARD 13 Q1860616 BOLT,FLANGE 14 S11-5305030 DASHBOARD VENT ASSY 15 S11-5305021 BODY,DASHBOARD 16 S11-5305260 INTERMEDIATE VENT ASSY 17 Q2140612 SCREW 18 S11-5305950 TRAY SET ASH 19 Q2734816 SELFTAPPING SCREW 20 S11-5305190 DOUBLE VENT ASSY 21 S11-5305051 DUCT BASE BODY 22 S11-5305820 AIR BAG,SECONDARY 23 S11-5305799 SHAFT 24 S11-5305427 PANEL,CENTER 25 S11-5305401 NOZZLEL© DEFROSTER 26 S11-5305402 NOZZLER© DEFROSTER 27 S11-5305423 CLIP,METAL 28 S11-5305420 PANEL SET DECORATION 29 S11-3402310BB AIRBAG,DRIVER 30 S11-5305351 NOZZLEL© DEFROSTER 31 S11-5305352 NOZZLER© DEFROSTER The automobile instrument is composed of various instruments and indicators, especially the driver's warning light alarm, which provides the driver with the required automobile operation parameter information. According to the working principle of automobile instruments, they can be roughly divided into three generations. The first generation of automobile instrument is mechanical movement meter; The second generation of automotive instruments is called electrical instruments; The third generation is all digital automobile instrument. It is a networked and intelligent instrument with more powerful functions, richer display contents and simpler harness links. Automotive instruments are mostly the third generation instruments, which can drive the base meter pointer through stepping motor, You can also use the LCD screen to directly display graphic or text information. At the same time, it also has an intelligent processing unit, which can interact with other control units of the car. Optoelectronic display instrument Optoelectronic display instrument The function of automobile instrument is to obtain the required data and display it in an appropriate way. The previous instruments were generally limited to 3 ~ 4 quantity displays and 4 ~ 5 warning functions. Now the new instruments have about 15 quantity displays and about 40 warning monitoring functions. Different information is obtained and displayed in different ways. At present, there are three main ways to obtain information of new instruments: transmission through body bus; Conversion through a / D sampling; Obtained through IO status change. There are five main display modes: 1. Drive the stepper motor to rotate; 2. Display graphic or digital information through dot matrix LCD display screen; 3. Display through Segment LCD screen or nixie tube; 4. Display through the switch of LED lamp; 5. The current status is indicated by different beeps of the buzzer. According to the above requirements, the automobile instrument panel designed in this paper is composed of MCU system, LED display driven by stepping motor, LCD display, alarm function, memory function, key processing, LIN bus communication, low-speed fault-tolerant can bus communication and power supply. principle The traditional speedometer is mechanical. A typical mechanical odometer is connected with a flexible shaft. There is a steel cable in the flexible shaft, and the other end of the flexible shaft is connected to a gear of the transmission. The gear rotation drives the steel cable to rotate, and the steel cable drives a magnet in the odometer cover ring to rotate. The cover ring is connected with the pointer and the pointer is placed at the zero position through the hairspring, The rotation speed of the magnet causes the change of the size of the magnetic line of force, and the balance is broken, so the pointer is driven. The speedometer is simple and practical, and is widely used in large and small cars. However, with the development of electronic technology, many car instruments have used electronic speedometer. The common one is to obtain the signal from the speed sensor on the transmission and deflect the pointer or display the number through the change of pulse frequency. Odometer is a kind of digital instrument, which makes the counter drum rotate by meshing the transmission gear of the counter drum with the worm on the transmission shaft of the speedometer. Its characteristic is that the upper level drum rotates for a whole circle and the lower level drum rotates for 1 / 10 circle. Like the speedometer, the odometer also has an electronic odometer, which obtains the mileage signal from the speed sensor. The mileage number accumulated by the electronic odometer is stored in the nonvolatile memory, and the state data can also be saved without electricity. Another prominent instrument is the tachometer. In domestic cars, tachometers were generally not set in the past, but in recent ten years, tachometers have been installed in all types of cars, and some manufacturers also take them as the configuration content of car grade. The tachometer unit is 1 / min × 1000, which shows how many thousand revolutions the engine rotates per minute. The tachometer can intuitively display the speed of the engine under various working conditions. The driver can know the operation of the engine at any time, cooperate with the transmission gear and throttle position to keep it in the best working state, which is good for reducing fuel consumption and prolonging the service life of the engine.