US 11,940,302 B2
Device and method for displacement measurement used in sensing device
Guangjin Li, Guilin (CN); Jian Shi, Guilin (CN); and Bingheng Li, Guilin (CN)
Assigned to GUILIN GEMRED SENSOR TECHNOLOGY ASSIGNEE CO., LTD., Guilin (CN)
Filed by Guilin Gemred Sensor Technology Co., Ltd., Guilin (CN)
Filed on Sep. 27, 2020, as Appl. No. 17/033,909.
Application 17/033,909 is a continuation in part of application No. PCT/CN2019/079193, filed on Mar. 22, 2019.
Claims priority of application No. 201810365459.X (CN), filed on Apr. 23, 2018.
Prior Publication US 2021/0010831 A1, Jan. 14, 2021
Int. Cl. G01D 5/241 (2006.01); G01D 5/249 (2006.01)
CPC G01D 5/2415 (2013.01) [G01D 5/2497 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A displacement measurement device for a sensing device, the sensing device comprising a first displacement sensor, and the displacement measurement device comprising:
a drive signal generating circuit configured to output a drive signal to the first displacement sensor;
a first signal processing circuit configured to receive a signal from the first displacement sensor and output a first ADSO signal; and
a computing device comprising a first timer;
wherein:
the first timer is configured to receive a CLK512 signal and the first ADSO signal, and time or count according to the CLK512 signal and the first ADSO signal;
the CLK512 signal is a square wave signal related to a period and phase of the drive signal; and
the device further comprises a clock frequency divider circuit configured to output a clock signal and the CLK512 signal to the drive signal generating circuit.