Abstract: Methods and apparatus optically measure acceleration, without Sagnac-effect corruption, without requiring slow light and without moving parts. Each optical accelerometer includes at least one measurement cell and at least one reference cell. Two optical signals traverse the cells in opposite directions around a figure-8-configured optical path and then interfere to produce an output signal. The reference cells have different indices of refraction than the measurement cells. Acceleration differentially affects speeds of the optical signals traversing the measurement and reference cells through differentially affecting the indices of refraction of the measurement and reference cells. These differences are evident in changes in the interference in the output signal, thereby enabling measurement of the acceleration. Several embodiments, including optical bench, vertical slab multi-pass, toroidal prism, planar waveguide, cylindrical waveguide, wound waveguide and optical fiber, are described.

Abstract: The bias error in a fiber optic system comprising a fiber optic gyroscope can be determined by determining of at least two different values for rotation rate by an evaluation unit of the fiber optic gyroscope for almost constant rotation rate applied to the fiber optic gyroscope and/or can be reduced by a linear combination of the at least two different values for the rotation rate. A fiber optic system that is suitable for carrying out this method comprises besides the fiber optic gyroscope a control device that is configured to control at least one element of the fiber optic gyroscope such that at least two different values for the rotation rate are determined by the evaluation unit of the fiber optic gyroscope for almost constant rotation rate applied to the fiber optic gyroscope.

Abstract: We have disclosed systems and methods for portable performance monitoring of an individual during a physical activity. The systems and methods may include a portable sensor component configured to be carried by the individual during the physical activity and configured to obtain movement data for the athlete individual during the physical activity. The systems and methods may also include a portable output component configured to be carried by the individual during the physical activity and configured to provide an output to the individual during the physical activity. The systems and methods may further include a portable processing component in communication with the portable sensor component and the portable output component, where the portable processing component is configured to be carried by the individual during the physical activity. The portable processing component may be configured to identify movement of the individual during the physical activity.

Abstract: A navigation system as described herein comprises a processing resource configured to receive destination data representative of a destination, to determine an expected travel time to the destination, and to determine a departure time in dependence upon the expected travel time to the destination, and an output device for providing the departure time to a user.

Abstract: A method is provided for calculating the estimated navigation performance prediction for a trajectory associated with a list of segments of a flight plan. A method for displaying the navigation performance in a corridor trajectory so as to guarantee compliance with the navigation performance requirements while offering immediate viewing of the navigation latitude in a corridor is also provided.

Abstract: In connection with a voyage in which a ship visits several ports on a sailing route, when a user inputs a berthing period at each port on the sailing route on a screen in a computer for managing voyage information displayed by a terminal device, the terminal device specifies, with regard to each sectional sailing route between two neighboring ports on the sailing route, fuel consumption rate when the ship sails on the sectional sailing route based on a sailing speed determined by the input berthing periods and parameters of maritime weather conditions under which the ship sails on the sectional sailing route. The terminal device calculates fuel consumption required for sailing on each sectional sailing route and total fuel consumption required for sailing the entire sailing route using the specified fuel consumption rates.

Abstract: Systems and methods for indicating an emergency exit path upon detection of a fire in a building structure. The systems and methods may include detecting a signal indicating presence of the fire in the building structure and determining an evacuation situation is present based on a risk assessment. In response to determining the evacuation situation is present, the systems and methods may include mapping the emergency exit path out of the building structure based on an identified location of the fire and an identified location of a person in the building structure, and operating a plurality of lighting devices in the building structure to indicate the emergency exit path out of the building structure.

Abstract: A location and mapping service is described that creates a global database of indoor navigation maps through crowd-sourcing and data fusion technologies. The navigation maps consist of a database of geo-referenced, uniquely described features in the multi-dimensional sensor space (e.g., including structural, RF, magnetic, image, acoustic, or other data) that are collected automatically as a tracked mobile device is moved through a building (e.g. a person with a mobile phone or a robot). The feature information can be used to create building models as one or more tracked devices traverse a building.

Abstract: Methods, computer-readable media, systems and apparatuses for determining a blind corner navigational score based on real-time or near real-time navigational analysis using sensor data, digital image data, and a map database are discussed. In some arrangements, detection of a blind sensor may be performing using sensor data, digital image data, and navigational data from a map database system. In at least some arrangements, a warning signal or a vehicle control signal may be transmitted to a vehicle in response to a determination that the blind corner navigational score is above a threshold. In at least some arrangements, route correction and/or route modification based on an upcoming blind corner may be performed if a blind corner navigational score is above a threshold.

Abstract: A travel route guide device includes a travel route calculation unit that calculates a travel route from a current position to a destination based on current position information, destination information, and a remaining amount of power of an electric vehicle, and information on a remaining power amount recovery facility. The travel route guide device includes a region division unit that divides a region including the travel route calculated by the travel route calculation unit into a plurality of local regions. The travel route device includes a constraint condition determination unit that determines a constraint condition for a monitoring variable. The travel route device includes a recalculation determination unit that monitors the monitoring variable corresponding to the local region including a position of the electric vehicle, and requests the travel route calculation unit to calculate the travel route when a value of the monitoring variable deviates from the constraint condition.

Abstract: In a navigation device in accordance with the invention, user profiles may be stored and used to navigate a user who may be driving in a vehicle, on foot, or in other mode of transportation. Each user profile corresponds to one of the user's personae. For example, the user business profile corresponding to the user's business persona may be different from the user personal profile corresponding to the user's personal persona. For instance, the user business profile may include fine-dining type restaurants for business meetings while the user personal profile may instead include fast-food type restaurants for personal dining. The inventive navigation device provides the user with a navigated route, together with information concerning the favorite facilities and events surrounding the navigated route, which satisfy the preferences in a selected user profile. In accordance with an aspect of the invention, blockages may also be established using the device to avoid selected areas, e.g.

Abstract: Methods, apparatus, systems, and computer program products for predicting short term travel behavior of a user without knowing the user's destination. In one embodiment, a method is provided. The method comprises receiving historical location information for a vehicle and querying a set of indexed partial routes. A partial route of the set of indexed partial routes has a compiled quantity assigned thereto. The method further comprises reducing the set of indexed partial routes to a set of candidate partial routes based at least in part on the historical location information and identifying a most likely partial route from the set of candidate partial routes based at least in part on the compiled quantity associated with each of the candidate partial routes.

Abstract: According to one embodiment of the present invention, a method is disclosed for calculating the route of a journey (trip) identified by an origin and a destination using traffic information on a terminal, wherein the method comprises the steps of: receiving updated traffic information relating to a first route, while the terminal or a moving object on which the terminal is mounted is running on the first route; calculating a second route by using the updated traffic information; and transmitting, to a server, an entire route or a partial route of the calculated second route.

Abstract: Provided herein is control method of an electronic apparatus, comprising: identifying a line region from a driving-related image data of a vehicle; generating a line information corresponding to a lane where the vehicle is located from an image data of the identified line region portion; generating a position information of a lane where the vehicle is located, using at least one of the generated line information and the lane information of a road where the vehicle is located; and performing a driving-related guide of the vehicle using the generated lane position information.

Abstract: A method is provided for operating a navigation system of a motor vehicle for searching for possible destinations, wherein a processing device of the navigation system is used: to receive a search input from a user, to search a first database and a second database for suitable database entries in each case on the basis of the search input and in this case to provide a first and a second results list of suitable database entries. The first database stores database entries that indicate geographical regions, and the second database stores database entries that indicate road names and/or special destinations. For each road name and/or special destination the second database indicates a reference to at least one geographical region. The processing devices determine entry pairs that each contain a database entry from the first results list and a database entry from the second results list as the possible destinations.

Abstract: A vehicle operation device is used in an autonomous vehicle autonomously controlled to drive along a determined driving route, and includes: a destination setting circuit configured to set a destination to a wide area for determining the driving route; a route setting circuit configured to allot a provisional destination on the boundary of the area of the destination according to route search conditions including a current position and the destination, so as to determine the driving route passing through the provisional destination; and a presenting circuit configured to provide a user with a task indicated by an item operated by the user while the autonomous vehicle is moving along the driving route toward the provisional destination, so that the task is executed in the area of the destination after reaching the provisional destination.

Abstract: Timing information and deeper trip planning can enhance conventional mapping functionality. A user provides a specified time of arrival and/or departure information along with a starting and end point, and receives a travel route with estimated arrival and departure times based on time-specific information, such as traffic or construction at specific times of day. The user can choose or be prompted to add one or more waypoints along the way. The user can get recommendations for hotels, restaurants, points of interest, and other such locations based on location, time of day, travel time, or other such aspects. Upon selecting a waypoint, the amount of time the user will be at that waypoint and the additional driving time are used to adjust one or more other times of the trip, such as the starting or departure times, or times of other waypoints.

Abstract: An onboard control device that is installed at a vehicle acquires land mark information including position information of a landmark which can be recognized on a road in which the vehicle is estimated to travel by a camera, a landmark image for recognition, a recognition evaluation value that represents ease of the recognition successfully performed and so on, and selects a landmark to be a subject for recognition based on the recognition evaluation value included in the landmark information. The onboard control device further evaluates the recognition results of the landmark to be a subject for recognition, and transmits the recognition results to the server with the landmark image recognized by the camera. The server aggregates the recognition evaluation results of the landmark and the recognized images and reflects them in the recognition evaluation values for the landmark information and landmark images to be transmitted to the onboard control device.

Abstract: A system for and method of indicating an angle of attack of an aircraft is provided. The system utilizes measurements from existing aircraft sensors so that a dedicated angle of attack sensor is not required. The system enables and benefits from a unique method that includes performing standard flight operations during a calibration flight. The system does not need any aerodynamic model of the aircraft because it utilizes information from the calibration flight to develop an estimated aerodynamic model of the specific airplane. The system utilizes the aerodynamic model and other information to estimate an angle of attack of the aircraft during flight. Finally, the system utilizes additional information to indicate the estimated angle of attack of the aircraft relative to an optimum angle of attack for the aircraft and/or a critical angle of attack of the aircraft. The system further enables recalibration, so as to accommodate aircraft aerodynamic modifications.

Abstract: Certain embodiments include receiving load data from an energy generation (EG) system, where the load data is provided by a load meter, and where the load data corresponds to a predetermined time period. The predetermined time period may be during peak daylight hours (e.g., between 10 A.M. and 2 P.M). The method includes receiving EG data from the EG system, where the EG data corresponds to EG generation by an EG circuit over the predetermined time period, and determining if an inverse relationship exists between the load data and EG data. The method includes determining that the load meter is installed upstream from the EG circuit if an inverse relationship between the load data and EG data exists, and determining that the load mater is installed downstream from the EG circuit if an inverse relationship between the load data and EG data does not exist.

Abstract: A motion sensor constituted of: a housing; a rotating member secured to the housing and arranged to rotate about a rotation axis of the rotating member responsive to motion of the housing across a surface; at least one bipolar magnet secured to the rotating member so as to rotate about the rotation axis of the rotating member with the rotation of the rotating member; and a transducer secured to the housing and juxtaposed with the rotating member, the transducer arranged to vary its output voltage in response to changes in magnetic field caused by the rotation of the at least one bipolar magnet.

Abstract: A rotational resolver system and method includes a rotational shaft to which at least one eccentric conductive coarse resolution disc is fixed and to which at least one conductive fine resolution disc is also fixed. The fine resolution disc defines a plurality of generally semicircular protruding edge segments. At least one conductive coarse-disc sensing coil is disposed adjacent an edge of the coarse resolution disc, and at least one conductive fine-disc sensing coil is disposed adjacent the edge of the fine resolution disc. These coils may be oriented for axial sensing of the respective disc.

Abstract: A proximity sensor may be mounted below a display cover layer in an electronic device. The proximity sensor may have a light source that emits light and a detector configured to detect reflections of the emitted light from nearby external objects. The light emitted from the light source may pass through a lens along an axis towards external objects. The light source and the detector may be mounted in a proximity sensor housing having openings that are aligned with the light source and the detector. A reflector may be mounted to the proximity sensor in a configuration that bridges the opening over the light source. The reflector may be formed from a strip of metal or a strip of prism structures. Some of the light from the light source reflects from the reflector at a non-zero angle with respect to the axis and enhances proximity sensor performance.

Abstract: There is provided an encoder device to measure a relative moving amount between a first and second members. The encoder device includes: a reflective-type diffraction grating on the first member; a light source unit to radiate a measuring light; a first optical member on the second member; a first and second reflecting units on the second member that cause first and third diffracted lights generated via diffraction of the measuring light and having orders different from each other to come into the diffraction grating respectively, and cause second and fourth diffracted lights generated via diffraction of the first and third diffracted lights respectively to come into the first optical member; photo-detectors configured to detect interference lights between two diffracted lights and other light beam respectively; and a measuring unit to obtain the relative moving amount by using detection signals from the photo-detectors.

Abstract: Examples of the disclosure enclose an optical target on an encoder and sensors inside a single integrated module, wherein the encoder and the sensors are coupled to the same rigid body to maintain optical alignment between the sensors and the optical target on the encoder. Further, the module itself may be hermetically sealed to protect the optical path (e.g., from a light source to the optical target to the sensors) from contamination due to outside dirt, debris, or light sources internal/external to the device that might further interfere with alignment and/or proper sensing. Because the integrated module results in smaller variations in the alignment between the optical target and the sensors, the dynamic range of the sensors may be reduced, resulting in less power consumption and, potentially, longer battery life for the device. The use of an integrated module can also enable relaxed manufacturing requirements for the optical sensor and/or the optical target.

Abstract: A system and method for discriminately measuring the response of a plurality of spatially separated fiber sensors positioned along an optical fiber using a sweep of electromagnetic radiation. Each fiber sensor affects the transmission of a particular wavelength of electromagnetic radiation and the particular wavelength affected by a given fiber sensor is dependent on at least one environmental property of the given fiber sensor. By detecting the particular wavelength affected by a given sensor, it is possible to determine the environmental property of the given sensor.

Abstract: A sensor includes a housing, at least one sensor component disposed within the housing such that there is space between the housing and the sensor component, and a vibrational damping material disposed within the space to dampen vibration of the sensor components relative to the housing. The sensor can be a thermal sensor. For example, the thermal sensor can be a linear thermal detector, an optical flame detector, or any other suitable type of sensor or combination of sensors.

Abstract: A sensor system includes first and second capacitive sensors. An excitation circuit, coupled with the sensors, applies an excitation voltage to each of the sensors. The excitation voltage is characterized by a first, second, and third excitation voltage components, wherein the second and third excitation voltage components have opposite polarities. A capacitance-to-voltage (C/V) converter, electrically coupled with the sensors, generates a differential-mode output signal in response to the first excitation voltage component applied to the sensors, and the C/V converter generates a common-mode output signal in response to the second and third excitation voltage components applied to the sensors.

Abstract: Appurtenances added to a pipe mitigate the effects of upstream valves, sluice gates or pipe elbows to condition the pipe flow for accurate flow rate detection by a reverse propeller meter. Further appurtenances allow the reverse propeller meter to be used in extreme debris situations such as weeds, vines and moss present in many canal systems. The system provides an electronic signal that indicates flow rate and accumulated flow volume, or the signal can be transmit to a central headquarters for remote gate control or canal automation.

Abstract: A flow sensor sub-assembly includes a flow tube having a lumen, an outside diameter, a first end, and a second end. An inlet fitting includes a conical orifice sized for insertion in either end of the flow tube, such that an internal passage of the inlet fitting is coaxial and concentric with the lumen and the end of the flow tube abuts a shoulder. An outlet fitting includes a conical orifice sized for insertion in either end of the flow tube, such that an internal passage of the inlet fitting is coaxial and concentric with the lumen and the end of the flow tube abuts a shoulder. A first piezo element integrated with the inlet fitting is arranged at an upstream position of the flow tube assembly and a second piezo element integrated with the outlet fitting is arranged at a downstream position of the flow tube assembly.

Abstract: A method for setting a constant magnetic field strength of a magnetic field within a commutation interval using a magnetic-inductive flowmeter having a current controller with which time for setting the constant magnetic field strength of a magnetic field is relatively shorter. Additionally, a first interval having a starting point in time and an ending point in time and a second interval having a starting point in time and an ending point in time are arranged within a commutation interval. A first setpoint current curve for the first interval differs by a difference current curve to effectuate a higher rate of change. A second setpoint current curve is assigned to the constant setpoint current. The current controller is fed the first and second setpoint current curves.

Abstract: A measurement control section of a flow meter device causes a measurement block dividing section to divide a sampling cycle Tc into three or more, for example, four measurement blocks Tb of an equal length and causes the flow measuring section to measure the flow of a fluid in each of the measurement blocks Tb. A flow calculating section of the flow measuring section calculates an average value of flow values obtained in all of the measurement blocks in each sampling cycle Tc, as a flow value in each sampling cycle Tc. This configuration allows a flow meter device which employs an inverse transit time difference method, such as an estimation gas meter, to more effectively lessen the influence of a pulsation and to perform flow measurement with higher accuracy.

Abstract: A fluid sensor comprises a fluid conduit having a wall defining a fluid flow path and an acoustic transducer located externally of the fluid flow path. The wall of the fluid conduit comprises a composite region between the acoustic transducer and the fluid flow path, the composite region comprising a composite material including a polymer matrix material and one or more reinforcing elements embedded within the polymer matrix material. Such a fluid sensor may be used for sensing a property of a fluid and, in particular though not exclusively for sensing a property of a fluid produced from or injected into an oil or gas well.

Abstract: A housing defines a bypass passage and a sub-bypass passage. The bypass passage draws a part of air flowing through an interior of a duct. The sub-bypass passage is branched from the bypass passage to draw a part of air flowing through the bypass passage. A flow sensor is equipped in the sub-bypass passage to cause heat transfer with air, which passes through the sub-bypass passage, and to generate an electric signal according to a flow quantity of air in the duct. An intake-air temperature sensor is configured to measure a temperature in the duct. A moisture sensor is configured to measure a humidity in the duct. The flow sensor and the multiple sensors are equipped in the sub-bypass passage and are located along a direction of flow of air in the sub-bypass passage.

Abstract: A device (12) that uses a temperature coefficient pre-calibrated for the device for measuring a flow within the device. The device includes a differential pressure sensor (80) configured to generate a differential pressure signal responsive to a differential pressure within a flow path (16) and a temperature sensor configured to sense a temperature near the differential pressure sensor. A differential amplifier amplifies differential pressure signals from the differential pressure sensor. A processor receives signals from the differential pressure sensor, amplified signals from the differential amplifier, and signals from the temperature sensor. The amplified signals are corrected based upon at least a predetermined temperature coefficient, and the processor calculates a flow rate based on the corrected representation of the differential pressure.

Abstract: An all-in-one measuring tool. has multiple measuring components embedded into a structure of any shape or size. The measuring components are positioned at various locations along the surface of the structure. Each measuring component is unique and can hold an amount of liquid or ingredient that is identified by a particular measurement. The measuring components can respectively include handles to enable a user to hold the measuring components.

Abstract: Described are apparatus and methods that automatically generate recommendations to growers. Using various different sets of data relative to a predetermined tract of agricultural land, typically including both imagery as well as electrical usage, they are processed together to make informed decisions regarding the state of the land, particularly with respect to water usage.

Abstract: An embodiment of the invention provides a liquid-level sensor to detect liquid-level information of a liquid to be tested in a container. The sensor includes an electrode, a sensing circuit, an amplifier and a controller. The electrode is disposed on the outer surface of the container, comprising a first electrode and a second electrode. The sensing circuit is coupled to a first electrode and a second electrode, and receives a clock signal to generate a first voltage signal and a second voltage signal. The amplifier receives the first voltage signal and the second voltage signal to output an output voltage. The controller acquires liquid-level information of the liquid to be tested according to the output voltage and a voltage-volume table.

Abstract: A positioning apparatus for a liquid level sensor includes a liquid level sensor support, such as a generally horizontal platform, having an aperture for receiving at least a portion of the liquid level sensor. An arm extends from the support and has an aperture for receiving a liquid outlet tube extending from an outlet of a liquid pass-through device. A hollow socket is spaced apart from the arm and removably attachable to the outlet of the liquid pass-through device. The apparatus maintains the relative position and orientation of the liquid level sensor to the liquid outlet tube extending from the outlet of the liquid pass-through device.

Abstract: A method for diagnosing a torque impulse generator which includes a rotational input portion, a torque output portion, an oil reservoir and a torque generating arrangement converting rotation of the input portion to torque impulses at the torque output portion, the method includes: detecting an acoustic signal from the torque impulse generator while generating torque impulses, extracting the frequency of torque impulses from the acoustic signal, and diagnosing the torque impulse generator based on the frequency of torque impulses, to indicate the level of oil in the oil reservoir.

Abstract: An inductive sensor device for sensing the level of a liquid within a reservoir. The inductive sensor device includes a rotor pivotally connected to an overmold housing. Further, an inductive coupler is mounted to the rotor. Moreover, a float is connected to the rotor to pivot the inductive coupler by the at least one receiving coil to determine the level of liquid within the reservoir.

Abstract: A fluid tank (1) of the type comprising at least two fluid-receiving chambers (2, 3) separated from each other by a partition (4), level detection means (5) for detecting the level of fluid in the first chamber (2), level detection means (10) for detecting the level of fluid in the second chamber (3), and signal emission means (20) for emitting a warning signal as a function of the level detected by said level detection means (5, 10). At least a portion of the level detection means (5) for detecting the level of fluid in the first chamber (2) is common to at least a portion of the level detection means (10) for detecting the level of fluid in the second chamber (3).

Abstract: A system and method for monitoring a level of material in a storage bin, including a gear train, a gear train shaft rotatably coupled to the gear train, a drive shaft, a coupling system to couple the gear train shaft to the drive shaft, a paddle coupled to the drive shaft to rotate in unison therewith, the paddle configured to engage a material in the storage bin when the level of material reaches a threshold level, and a stepper motor. A controller may be communicatively coupled to the stepper motor wherein the controller is configured to monitor the running state and the stall state of the stepper motor.

Abstract: A system of detecting loading and unloading of mobile containers such as grain carts utilizes two low pass filters to determine whether the contents of the container are changing by subtracting one filter signal from the other, and using the sign of the difference. Weighing performance is improved by utilizing accelerometers to compensate for measurement dynamics and non-level orientation. Failure and degradation of weight sensors is detected by testing sensor half bridges. Loading and unloading weights can be tied to specific vehicles by utilizing RF beacons.

Abstract: The present disclosure discloses an electronic coaster for estimating amount of calories consumed by a user, through a beverage present in a beverage holder. The electronic coaster comprises at least one weight sensor to measure weight of a beverage holder comprising a beverage and a computing unit to receive the measured weight from the at least one weight sensor, determine weight of the beverage based on the received weight, identify beverage type and a predefined calorific value corresponding to the beverage type, determine change in weight from the weight of the beverage and estimate total amount of calories consumed by a user based on the change in weight and the predefined calorific value.

Abstract: A housing for a laboratory device, having floor, ceiling, rear, side, and front walls, which together form an operating chamber, wherein the front wall is movable upward and downward between a lowered closed position and a raised open position in a linear and simultaneously pivoting manner and, in the open position of the front wall, the operating chamber is open on the front side of the housing. The top wall section having top and bottom wall sections connected about a first pivot axis and transitions in an arc shape to a plate-shaped connection section extending at an angle to the top wall section, or is connected thereto in an angularly rigid manner, and a connection section is hinged in a pivoting manner to the ceiling on the edge thereof distant from the top wall section parallel to the first pivot axis, at a distance from the front wall.

Abstract: A fastening structure of a brittle-fracturable panel material includes a first fastening flange, a second fastening flange, and a light transmission window panel made of a brittle-fracturable panel material, wherein the light transmission window panel is nipped between the first fastening flange and the second fastening flange, and both fastening flanges are air-tightly fitted and fastened.

Abstract: An optical imaging system includes a coherent light generator, imaging optics and a detection system. The coherent light generator is configured to generate squeezed light. The imaging optics is arranged to direct the squeezed light from the coherent light generator onto a target object and to receive squeezed light reflected by the target object. The detection system includes a local oscillator configured to generate un-squeezed light at a same frequency and phase as the squeezed light, a combiner arranged to combine the received squeezed light from the imaging optics and the un-squeezed light from the local oscillator to provide combined light, and a detector arranged to receive and detect the combined light.

Abstract: An optical sensor device includes a light emitter for emitting, to a living body, lights having two wavelengths and blinking at a predetermined frequency, and a light receiver for receiving the lights from the living body. The light receiver outputs first and second detection signals corresponding to the respective wavelengths. A filter circuit extracts, from the first and second detection signals, modulation signals that are obtained with amplitude modulation of signals of the predetermined frequency. The modulation signals are amplified by a post-amplifier and are taken into an arithmetic processing unit after being converted to digital signals by an AD converter. The arithmetic processing unit calculates DC components and AC components of the first and second detection signals by employing the modulation signals converted the digital signals.

Abstract: An ultraviolet light sensing circuit and sensing system. The ultraviolet light sensing circuit comprises a modulation unit and a phase delay unit, wherein the modulation unit comprises a first stage of inverter which is used for sensing ultraviolet light and is used as a voltage feedback modulation stage; and the phase delay unit comprises N stages of inverters which are connected in sequence, where N is an even number which is greater than or equal to 2. The modulation unit is connected to the phase delay unit in sequence, and the output voltage of the phase delay unit is fed to the modulation unit; and the modulation unit is modulated by a control signal which is a pulse signal. The ultraviolet light sensing circuit and sensing system can be used for ultraviolet light information communications. The ultraviolet light sensing circuit can sense ultraviolet light signals and output amplitude modulation wave signals.