Method of detecting a vehicle speed and related electronic device
First Claim
Patent Images
1. A method of detecting a vehicle'"'"'s speed, the method comprising:
- a wireless signal transceiver outputting a detecting wave;
the wireless signal transceiver receiving a reflecting wave from an external object when the external object passes through a covering range of the detecting wave;
a control unit calculating a frequency variation between the detecting wave and the reflecting wave; and
the control unit reading a table for executing an application program according to the frequency variation and information of the table, wherein a brake system of an emitter is actuated when the frequency variation is greater than a second threshold value of the table, and the brake system is accordingly shut down when the frequency variation is varied to be smaller than the second threshold value during actuation of the brake system.
1 Assignment
0 Petitions
Accused Products
Abstract
A method of detecting a vehicle speed is disclosed in the present invention. The method includes outputting a detecting wave, receiving a reflecting wave from an external object when the external object passes through a covering range of the detecting wave, calculating a variation between the detecting wave and the reflecting wave, and reading a table for executing an application program according to information of the table.
-
Citations
20 Claims
-
1. A method of detecting a vehicle'"'"'s speed, the method comprising:
-
a wireless signal transceiver outputting a detecting wave; the wireless signal transceiver receiving a reflecting wave from an external object when the external object passes through a covering range of the detecting wave; a control unit calculating a frequency variation between the detecting wave and the reflecting wave; and the control unit reading a table for executing an application program according to the frequency variation and information of the table, wherein a brake system of an emitter is actuated when the frequency variation is greater than a second threshold value of the table, and the brake system is accordingly shut down when the frequency variation is varied to be smaller than the second threshold value during actuation of the brake system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. An electronic device disposed on an emitter, the electronic device being capable of detecting a moving speed of an external object, the electronic device comprising:
-
a wireless signal transceiver for outputting a detecting wave and for receiving a reflecting wave from an external object when the external object passes through a covering range of the detecting wave; a memory module for storing a table, the table comprising a plurality of threshold values and a plurality of application programs; and a control unit electrically connected to the wireless signal transceiver and the memory module, and further coupled to the emitter in an external connection, the control unit calculating a frequency variation between the detecting wave and the reflecting wave, reading the table and executing the corresponding application program according to the frequency variation and the threshold value; wherein each application program is executed when the frequency variation is within a range of the corresponding threshold value, a brake system of the emitter is actuated when the frequency variation is greater than a threshold value of the table, and the brake system is accordingly shut down when the frequency variation is varied to be smaller than the threshold value during actuation of the brake system, and the electronic device is a vehicle operation recorder. - View Dependent Claims (10, 11, 12, 13, 14)
-
-
15. An electronic device disposed on an emitter, the electronic device being capable of detecting a moving speed of an external object, the electronic device comprising:
-
a wireless signal transceiver for outputting a detecting wave and for receiving a reflecting wave from an external object when the external object passes through a covering range of the detecting wave; a memory module for storing a table, the table comprising a plurality of threshold values and a plurality of application programs; and a control unit electrically connected to the wireless signal transceiver and the memory module, and further coupled to the emitter in a built-in manner, the control unit calculating a frequency variation between the detecting wave and the reflecting wave, reading the table and executing the corresponding application program according to the frequency variation and the threshold value; wherein each application program is executed when the frequency variation is within a range of the corresponding threshold value, a brake system of the emitter is actuated when the frequency variation is greater than a threshold value of the table, and the brake system is accordingly shut down when the frequency variation is varied to be smaller than the threshold value during actuation of the brake system, and the electronic device is a vehicle operation recorder. - View Dependent Claims (16, 17, 18, 19, 20)
-
Specification