The surveying device main unit includes: a distance-measuring light-emitting unit; a light-receiving unit; a distance-measuring unit; an optical axis-deflecting unit; an emitting direction-detecting unit; and an arithmetic control unit. The arithmetic control unit controls two-dimensional scanning with a scanning pattern having an intersection at which an outward passage and a return passage of the two-dimensional scanning intersect, updates three-dimensional data of the measurement target each time a light-receiving signal is detected during the two-dimensional scanning, generates weights for detecting a reference point of the measurement target and for detecting a rotation angle of the measurement target in accordance with the distance from the intersection, each time the three-dimensional data is updated, and tracks the measurement target based on the reference point position and the rotation angle of the measurement target calculated using the weights.

The surveying device main unit includes: a distance-measuring light-emitting unit; a light-receiving unit; a distance-measuring unit; an optical axis-deflecting unit; an emitting direction-detecting unit; and an arithmetic control unit. The arithmetic control unit controls two-dimensional scanning with a scanning pattern having an intersection at which an outward passage and a return passage of the two-dimensional scanning intersect, updates three-dimensional data of the measurement target each time a light-receiving signal is detected during the two-dimensional scanning, generates weights for detecting a reference point of the measurement target and for detecting a rotation angle of the measurement target in accordance with the distance from the intersection, each time the three-dimensional data is updated, and tracks the measurement target based on the reference point position and the rotation angle of the measurement target calculated using the weights.

A LiDAR can include a laser, an avalanche photodiode, a splitter, and a processor. The laser can be configured to emit a narrow electromagnetic pulse. The avalanche photodiode can be configured to receive one or more electromagnetic pulses and output a response signal in response to said pulses. The photodiode can also be positioned to receive at least one reflected pulse, reflected by an object external from the LiDAR sensor and caused by the laser. The avalanche photodiode can also have a bias voltage applied to it affecting the response signal. The splitter can be positioned to receive the narrow electromagnetic pulse and split it into at least one external pulse directed toward the object external from the LiDAR sensor and at least one calibration pulse directed toward the photodiode. The calibration pulse directed toward the photodiode can be received by the photodiode before the pulse reflected by the object. The processor can be configured to receive response signals from the photodiode. Further, the processor can be configured to adjust the bias voltage according to a response signal caused by the calibration pulse to compensate for temperature changes of the photodiode.

A three-dimensional imaging and display system is provided in which user input is optically detected in an imaging volume by measuring the path length of an amplitude modulated scanning beam as a function of the phase shift thereof. Visual image user feedback concerning the detected user input is presented.

The present disclosure relates to a measurement device, a measurement method, and a program that enable measurement in a shorter time.

A signal for giving an instruction on emission timing to emit a pulse of laser light is generated in order to output the laser light having the number of pulse emissions of two or more times within a distance measurement range time of one time by setting, as the distance measurement range time, a width of a flight time in which light reciprocates between the measurement device and a distance measurement range representing a fixed distance width including a distance to be measured. Then, a count code indicating timing at which a pulse of reflected light that is the laser light reflected by the distance measurement target and returned is received is output according to the number of pulse emissions in the distance measurement range time of one time, and the distance to the distance measurement target is calculated according to the specific count code among a plurality of the count codes. The present technology can be applied to a measurement device that measures a distance.

The present disclosure relates to a measurement device, a measurement method, and a program that enable measurement in a shorter time.

A signal for giving an instruction on emission timing to emit a pulse of laser light is generated in order to output the laser light having the number of pulse emissions of two or more times within a distance measurement range time of one time by setting, as the distance measurement range time, a width of a flight time in which light reciprocates between the measurement device and a distance measurement range representing a fixed distance width including a distance to be measured. Then, a count code indicating timing at which a pulse of reflected light that is the laser light reflected by the distance measurement target and returned is received is output according to the number of pulse emissions in the distance measurement range time of one time, and the distance to the distance measurement target is calculated according to the specific count code among a plurality of the count codes. The present technology can be applied to a measurement device that measures a distance.

A system simultaneously tracks multiple objects. All or a subset of the objects includes a wireless receiver and a transmitter for providing an output. The system includes one or more wireless transmitters that send commands to the wireless receivers of the multiple objects instructing different subsets of the multiple objects to output (via their respective transmitter) at different times. The system also includes object sensors that receive output from the transmitters of the multiple objects and a computer system in communication with the object sensors. The computer system calculates locations of the multiple objects based on the sensed output from the multiple objects.

A system simultaneously tracks multiple objects. All or a subset of the objects includes a wireless receiver and a transmitter for providing an output. The system includes one or more wireless transmitters that send commands to the wireless receivers of the multiple objects instructing different subsets of the multiple objects to output (via their respective transmitter) at different times. The system also includes object sensors that receive output from the transmitters of the multiple objects and a computer system in communication with the object sensors. The computer system calculates locations of the multiple objects based on the sensed output from the multiple objects.

A distance measuring device includes a controller and a distance calculator. The controller sets, in a first time period, a first measurement time range corresponding to a first measurement distance range; causes a light emitter to emit light and places a light receiver into an exposure state, in the first measurement time range; sets, in a second time period, a second measurement time range corresponding to a second measurement distance range; and causes the light emitter to emit light and places the light receiver into an exposure state, in the second measurement time range. At least one measurement condition is different between the first and second time periods. The distance calculator calculates the distance from the distance measuring device to a measurement target, based on the time from the emission to the reflection of light. The time is in at least one of the first and second time periods.

A distance measuring device includes a controller and a distance calculator. The controller sets, in a first time period, a first measurement time range corresponding to a first measurement distance range; causes a light emitter to emit light and places a light receiver into an exposure state, in the first measurement time range; sets, in a second time period, a second measurement time range corresponding to a second measurement distance range; and causes the light emitter to emit light and places the light receiver into an exposure state, in the second measurement time range. At least one measurement condition is different between the first and second time periods. The distance calculator calculates the distance from the distance measuring device to a measurement target, based on the time from the emission to the reflection of light. The time is in at least one of the first and second time periods.