Electronic speedometers work differently and will have their own benefits and draw backs. Electronic speedometers are newer technology that are quickly replacing their mechanical counterparts. Electronic speedometers work quite differently from mechanical speedometers.
With an electronic speedometer, magnets are attached to the rotating drive shaft and pass by magnetic sensors measuring how quickly they spin. When the magnet passes the sensor, the create a small electric current which allows the sensor to count how quickly the current is recorded. The sensor and computer then converts this frequency into speed using math. The speed is then displayed on the electronic LCD display.
Not only does this system count speed, it also keeps track of mileage and feeds data to the odometer. The speedometer is the device in a vehicle that captures the speed and displays that data to the driver through the dashboard of the vehicle. There are several types of speedometers that work in various ways. They all measure how quickly the wheels rotate. Another component similar to the speedometer is the odometer. The odometer captures how far the vehicle has traveled. The speedometer is part of the instrument cluster on your vehicle which displays important vehicle statistics such as speed, miles traveled, temperature of the vehicle, and fuel levels.
The instrument cluster also is where you will find warning lights for your car. The speedometer has two separate semicircles which contain a set of numbers. The smaller semi circle shows numbers in kilometers and the exterior semi circle typically displays figures in miles. As the hand of the speedometer sweeps through the circles, where it sits is the current speed of the vehicle.
Car repairs can be absurdly expensive, and you can expect those unexpected repairs before too long no matter what vehicle you drive. As the ribbon moves, a mark on it lines up with the calibrated scale to give a reading. The other type of indicator using a straight scale rather than a dial has a barrel marked with a line. The magnet causes the barrel to rotate until stopped by the hair spring. Again, as the barrel moves, the mark on it lines up with the scale to indicate the speed.
On both these types of speedometer the ribbon or barrel is usually a different colour on each side of the marker line to make the speed easier for the driver to read. In common with the trend towards electronic dashboard instruments, electronic speedometers are now becoming much more popular, even though mechanical ones are generally reliable.
The most common type has a magnet attached to the gearbox output shaft and an electronic unit positioned close by to act as a pickup. Every time the rotating magnet passes the pick-up unit, the unit sends a pulse of electric current down a wire to the speedometer. An electronic 'black box' inside the speedo uses these impulses to calculate the speed of the car. The Video Course teaches you everything about modern cars. Inside a mechanical speedometer. Engine Block 18 minutes.
Every part explained There's ridiculous detail on every part. Clearly and easily explained. How is that possible? How does an aircraft measure its speed? Does it measure wind flow over the wings? If so, how do instruments compensate for cross winds? And how does an attitude indicator function, despite any g-forces that act on the aircraft? I count six question marks!
But then nobody ever does. The ability to measure your rate of forward progress accurately is pretty key for both car and airplane safety. For example, you always want your pilot to have a idea about just how fast the airplane is moving when you are coming in for a landing. The speed with which your car is traveling may indeed be related to how hard you engine is working, and whether you are going uphill or downhill, but those factors have nothing at all to do with measuring the rate of speed.
Instead, the rate of rotation of a drive shaft is used to determine how fast your car is moving. The trick here is translating that rotation into its miles-per-hour equivalent.
On the drive shaft is a worm gear, which is threaded like a screw. That worm gear turns a notched gear which sits at one end of the speedometer cable.
0コメント