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if the speedometer of a car reads a constant
The speedometer of a car reads a constant: The parameters on the speedometer of the car include:
1. Accumulated kilometers traveled by the vehicle: the number of kilometers traveled by the vehicle from the time of delivery to the present;
2. Temporary mileage accumulation of vehicles: the number of kilometers traveled by vehicles from place A to place B;
3.The speed of the car: It is the number of kilometers that the car runs per hour in an instant or for a long time.
The speedometer actually consists of two meters. One is a speedometer and the other is a speedometer. The traditional speedometer is mechanical. A typical mechanical travel meter is connected to a flexible shaft. There is a wire rope in the flexible shaft. The other end of the flexible shaft is connected to a gear of the gearbox. The rotation of the gear drives the rotation of the wire rope. The wire rope drives the magnet in the cover ring of the travel meter to rotate. The ring is connected with the pointer, and the pointer is adjusted to the zero position by the hairspring. The speed at which the magnet rotates causes changes in the magnetic lines of force. The balance is broken and the pointer is driven. This speedometer is simple and practical. It is widely used in cars of all sizes. However, with the development of electronic technology. At present, electronic speedometer has been used in many automobile instruments, one of which is to obtain signals from the speed sensor on the gearbox through the change of pulse frequency, so that the pointer can deflect or display numbers.
The odometer is a kind of digital instrument, which makes the counting cylinder run by meshing the transmission gear of the counting cylinder with the worm on the driving shaft of the odometer. The utility model is characterized in that the upper drum rotates for one full circle. The next drum rotates 1/10 times. Like the speedometer, the current speedometer also has an electronic speedometer, which obtains the trip signal from the speed sensor. The number of trips accumulated by the electronic trip meter is stored in the nonvolatile memory, and the status data can also be stored without power.
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