Distance measuring device

The distance measuring device according to claim wherein

• the measurement circuitry includes:
• a light receiving element configured to output an output signal corresponding to intensity of light received via the optical mechanism system;
• and
• a first switching element connected in series to the light receiving element and configured to interrupt the output of the light receiving element according to elapse of the time period from the start of the output of the output signal, and
• the detection signal is based on the output signal.

A distance measuring device comprising:

• emission circuitry configured to intermittently emit pulse light a plurality of times;
• an optical mechanism system configured to emit the pulse light emitted by the emission circuitry to an object to be measured and receive scattered light of the pulse light scattered by the object to be measured;
• a photodetector configured to output an output signal corresponding to intensity of light received via the optical mechanism system;
• AD conversion circuitry configured to sample, at a plurality of sampling timings, a signal corresponding to the output signal of the photodetector every time the pulse light is emitted and convert the signal into a digital detection signal;
• time-division integration circuitry configured to output, as an integrated digital detection signal, an integrated value obtained by integrating the digital detection signal at each of the sampling timings;
• and
• measurement processing circuitry configured to measure, on the basis of a first point in time of a peak in the integrated digital detection signal, the distance to the object to be measured using a second point in time of a peak in the digital detection signal, a time range of which is limited.

A distance measuring device comprising:

• a light source configured to intermittently emit pulse light;
• an optical mechanism system configured to emit light from the light source to an object to be measured and receive scattered light returning from a predetermined direction in scattered light of the light scattered by the object to be measured;
• a photodetector configured to output a detection signal having magnitude corresponding to intensity of light made incident via the optical mechanism system;
• first distance measurement circuitry configured to convert signals based on the detection signal into digital detection signals, integrate sampling values at sampling timings corresponding to the respective digital detection signals, and measure a distance to the object to be measured on the basis of the integrated sampling values;
• and
• second distance measurement circuitry configured to acquire, on the basis of the detection signal, a time difference between time when the light source emits the pulse light and time until the scattered light of the light scattered by the object to be measured is detected by the photodetector, and measure the distance to the object to be measured on the basis of the time difference.