A control system is provided for a fluid delivery device. The control system includes an emitter operable to emit a series of pulses of electromagnetic radiation, as well as a detector operable to detect as a series of detection events electromagnetic radiation pulses reflected by an object on which the emitted pulses of electromagnetic radiation are incident. The control system also includes a microprocessor operable to receive signals corresponding to each detection event from the detector, and to analyse a series of samples of the signals received from the detector. Each sample corresponds to a plurality of successive detection events. The microprocessor is also operable to subsequently generate one or more signals to control operation of the fluid delivery device depending on the results of the analysis.

The present technology relates to a distance measurement sensor, a signal processing method, and a distance measurement module that make it possible to detect that an object to be measured is a specular reflector. The distance measurement sensor includes a signal processing unit that calculates a distance to an object and a degree of confidence, from a signal obtained by a light receiving unit that receives reflected light that is returned light obtained by reflecting irradiation light emitted from a predetermined light emitting source by the object, and outputs a determination flag determining whether the object that is an object to be measured is a specular reflector having a high reflectance. The present technology can be applied to, for example, a distance measurement module that measures a distance to a subject, and the like.

A receiver of a lidar system configured to receive one or more scattered light pulses from a target in a field of regard of the lidar system. The receiver includes a detector that emits an electric signal representative of the received light pulse in response to detecting the received light pulse. The receiver further includes one or more analog circuits configured to receive the electric signal from the detector, sample one or more voltages of the electric signal, and determine the energy of the received light pulse based at least on the one or more sampled voltages. The lidar system may further calculate a reflectivity and/or other characteristics of the target based at least on the energy of the received light pulse.

A method includes actuating a laser diode to emit a first series of laser pulses in a first frequency, enabling ap single-photon-avalanche diode (SPAD) in a pixel of a focal-plane array to detect a photon during a first series of enable times defined by a first series of enable pulses in a second frequency greater than the first frequency, and updating a histogram memory based on a photon detected during the first series of enable times.

A method for Time-of-Flight (ToF) sensing of a scene is provided. The method includes performing, by a ToF sensor, a plurality of first ToF measurements using a first modulation frequency to obtain first measurement values. A respective correlation function of each of the plurality of first ToF measurements is periodic and exhibits an increasing amplitude over distance within a measurement range of the ToF sensor. The method additionally includes determining a distance to an object in the scene based on the first measurement values.

The present technology relates to a distance measuring device and a distance measuring method that inhibit possible noise in a pixel signal based on reflected light from an object to allow accuracy of distance measurement to be maintained. A distance measuring device according to an aspect of the present technology includes a light emitting section emitting irradiation light, a light receiving section receiving reflected light corresponding to the irradiation light reflected at an object, a calculation section calculating a distance to the object on the basis of a time from emission of the irradiation light until reception of the reflected light, and a control section controlling emission of the irradiation light. The light receiving section includes a plurality of AD converting section AD-converting pixel signals read from the pixels. A first pixel signal and a second pixel signal respectively read from a first pixel and a second pixel of the plurality of pixels forming the light receiving section are AD-converted by an identical AD converting section of the plurality of AD converting sections, the first and second pixels being adjacent to each other. During a process of calculating the time, the calculation section calculates a difference between the first pixel signal and the second pixel signal AD-converted by the identical AD converting section.

The present technology relates to a distance measuring device and a distance measuring method that inhibit possible noise in a pixel signal based on reflected light from an object to allow accuracy of distance measurement to be maintained. A distance measuring device according to an aspect of the present technology includes a light emitting section emitting irradiation light, a light receiving section receiving reflected light corresponding to the irradiation light reflected at an object, a calculation section calculating a distance to the object on the basis of a time from emission of the irradiation light until reception of the reflected light, and a control section controlling emission of the irradiation light. The light receiving section includes a plurality of AD converting section AD-converting pixel signals read from the pixels. A first pixel signal and a second pixel signal respectively read from a first pixel and a second pixel of the plurality of pixels forming the light receiving section are AD-converted by an identical AD converting section of the plurality of AD converting sections, the first and second pixels being adjacent to each other. During a process of calculating the time, the calculation section calculates a difference between the first pixel signal and the second pixel signal AD-converted by the identical AD converting section.

An electronic distance meter comprises a coupler located between a laser source and a target and adapted to divert a portion of measurement light emitted by the laser source into a calibration portion connected to a photodetector and comprising an attenuator between said coupler and said photodetector for varying the luminance value of the light passing through the calibration portion, said calibration portion having a known length and said processor being configured to perform distance measurements through the calibration portion at a variety of luminance values achieved by said attenuator to derive calibration values from said distance measurements and said known length, said processor being further configured to use said calibration values for determining a target distance based on a return pulse signal.

A multiple-pulses-in-air (MPiA) laser scanning system, wherein the MPiA problem is addressed in that an MPiA assignment of return pulses to send pulses of a laser scanner is based on range tracking and range probing at intermittent points in time. Each range probing comprises a time-of-flight arrangement which is constructed to be free of the MPiA problem. The invention further relates to an MPiA laser scanning system, wherein an MPiA ambiguity within a time series of return pulses, is converted into 3D point cloud space, which provides additional information from the spatial neighborhood of the points in question to enable MPiA disambiguation.

A ladar system and related method are disclosed where the system includes a ladar transmitter and a ladar receiver. The ladar transmitter transmits ladar pulses into a field of view, and the ladar receiver receives ladar pulse returns from objects in the field of view. The ladar receiver comprises a cross-receiver, the cross-receiver comprising a first 1D array of photodetector cells and a second 1D array of photodetector cells that are oriented differently relative to each other.