1. The working principle of the bicycle computer
The principle of the bicycle computer is that the sensor captures the information brought by the induction magnet when the rim rotates, and the information is transmitted through the sensor wire. It is transmitted to the computer, and the host computer calculates the speed, mileage and other information after processing it.
In layman’s terms That is, a magnet-like thing is installed on the front wheel, and a sensor is installed on the front fork. Once the wheel rotates, the magnet will pass by the sensor once, and the stopwatch will count a circle. According to the pre-set wheel parameters, The stopwatch calculates the speed and distance. To put it simply, the airflow formed during the riding process is induced by the air hole of the stopwatch, thereby measuring the speed.
2. What is the reason for the inaccuracy of the bicycle computer?
The time of the bicycle computer is inaccurate
1. There are generally only two buttons on the stopwatch, the ‘SET button’ behind is the setting button, and the ‘big button’ is to switch to the next setting item and adjust the value. Press and hold the ‘SET button’ on the back of the stopwatch for more than 2 seconds, and the screen displays ‘SET OPEN’ to enter the setting mode.
2. The screen displays ‘SIZE 2155’, where the wheel rim value is set. Press the ‘big key’ once, the screen displays ‘UNIT KMH’, that is, the displayed value is ‘km/h’.
3. Press the ‘big button’ once, the screen displays ‘DIST 0’, which is the total mileage. Press the ‘big key’ once, and the screen displays ‘TIME 00:02’, which is the time.
4. Press the ‘big key’ once, the screen displays ‘SCAN OFF’, that is, the scroll display mode is turned off.
5. Then go back to the ‘TIME’ interface, tap the ‘SET button’ once, the numbers will flash respectively, press the ‘big button’ to set the numbers respectively.
6. After the time is adjusted, press the ‘SET button’ again, the screen displays ‘SET OK’, the time setting is successful.
7. Press and hold the ‘SET button’ behind the stopwatch for more than 2 seconds, the screen will display ‘SET CLOSE’, exit the setting mode, and then press the ‘big button’ to switch to the time to view the set time .
The average speed of the bicycle computer is inaccurate
The biggest reason for the inaccurate speed of the bicycle computer is the wrong setting of the wheel circumference. The circumference of the stopwatch wheel needs to be set. It is necessary to accurately measure the size of the rim, and then set the parameters of the stopwatch according to the size of the rim.
Inaccurate top speed of bicycle computer
There are many reasons for inaccurate top speed of bicycle computer, but the principle is basically the same. That is, when the magnet of the front wheel passes through the sensor (reed switch) of the stopwatch, the wheel just vibrates, such as pressing a pit, sudden braking, etc., which makes the magnet sway near the sensor of the stopwatch. The stopwatch thinks that during this period of shaking, the front wheel has turned a full circle, so a very high speed will suddenly appear and be recorded. This is a normal phenomenon and should not be taken care of.