Patent ID: 11940302
Assignee: GUILIN GEMRED SENSOR TECHNOLOGY ASSIGNEE CO., LTD.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 12:
13. The device of claim 3, wherein the sensing device further comprises a second displacement sensor; the first displacement sensor comprises a plurality of grating spacings within one grating spacing of the second displacement sensor; the drive signal generating circuit is further configured to output the drive signal to the second displacement sensor; and the displacement measurement device further comprises a second signal processing circuit configured to receive a signal from the second displacement sensor and output a second ADSO signal; the computing device further comprises a third timer configured to receive the second ADSO signal and the CLK512 signal, and to time or count according to the CLK512 signal and the second ADSO signal at the clock frequency provided by the counting clock;
the processor is further configured to determine the number of the grating spacing of the displacement of the gate of the first displacement sensor according to the data obtained by timing or counting of the third timer, and to obtain a total absolute displacement value of the gate of the first displacement sensor according to the number of the grating spacing of the displacement of the gate of the first displacement sensor and the data obtained by timing or counting of the first timer.