Time measurement correction method and device
AssigneeSz Dji Technology Co., Ltd.
InventorsChuang WANG, Mingming GAO, Xiang LIU, Xiaoping HONG
Life of this patent
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Abstract
A time measurement correction method includes a field programmable gate array (FPGA) determining to enter a self-correction mode of time measurement, and in the self-correction mode, the FPGA controlling to generate a standard signal and the FPGA controlling to obtain the standard signal and collecting measurement data of at least one TDC channel included in the FPGA based on the standard signal. The standard signal is used to correct the at least one TDC channel of the FPGA.
Claims20
A time measurement correction method comprising:
- a field programmable gate array (FPGA) determining to enter a self-correction mode of time measurement, the FPGA including at least one time-to-digital conversion (TDC) channel;
- and
- in the self-correction mode:
- the FPGA controlling to generate a standard signal, the standard signal being configured to correct the at least one TDC channel of the FPGA;
- and
- the FPGA controlling to obtain the standard signal and collecting measurement data of the at least one TDC channel based on the standard signal.
A field programmable gate array (FPGA) comprising:
- at least one time-to-digital conversion (TDC) channel;
- and
- a control device configured to:
- determine that the FPGA enters a self-correction mode of time measurement;
- and
- in the self-correction mode:
- control to generate a standard signal, the standard signal being configured to correct the at least one TDC channel of the FPGA;
- and
- control the FPGA to obtain the standard signal and collect measurement data of the at least one TDC channel based on the standard signal.
A distance measurement device comprising:
- a transmitter configured to emit a laser pulse sequence;
- and
- a field programmable gate array (FPGA) comprising:
- at least one time-to-digital conversion (TDC) channel;
- and
- a control device configured to:
- determine that the FPGA enters a self-correction mode of time measurement;
- in the self-correction mode:
- control to generate a standard signal, the standard signal being configured to correct the at least one TDC channel of the FPGA;
- and
- control the FPGA to obtain the standard signal and collect measurement data of the at least one TDC channel based on the standard signal;
- wherein the FPGA is configured to control the transmitter to emit the laser pulse sequence, receive an electrical pulse signal, and perform the time measurement on the electrical pulse signal through the at least one TDC channel, the electrical pulse signal is converted from an optical signal returning along an emitting optical path of the laser pulse sequence after the laser pulse sequence is reflected by an object.
Dependencies are inferred from the claim text.