A method of controlling a mobile platform includes measuring a distance between the mobile platform and an object when the mobile platform is located at each of a plurality of positions to obtain a plurality of measured distances each being obtained at one of the plurality of positions. Location information of the plurality of positions of the mobile platform is obtained by an inertial measurement unit (IMU) on the mobile platform. The at least two distance sensors being configured to capture data from different directions. The method further includes determining a position of the object based on the plurality of measured distances and the location information and controlling the mobile platform to avoid the object based on the results of the determined position of the object.

An object detection device includes: a transmission unit configured to transmit a transmission wave; a reception unit configured to receive a reception wave, which is the transmission wave reflected by and returned from an object, until a predetermined measurement time elapses after the transmission wave is transmitted; a detection unit configured to detect the object based on distance information based on the reception wave received by the reception unit; and a reception control unit configured to set the measurement time after the detection of the object to be shorter than the measurement time after a non-detection of the object.

An object detection device includes a transceiver configured to transmit/receive an ultrasonic wave; a drive signal generation unit configured to generate a drive signal for driving the transceiver; a transmitter circuit configured to cause the transceiver to transmit a probe wave, which is an ultrasonic wave, by driving the transceiver based on the drive signal; and a receiver circuit configured to generate a reception signal corresponding to a reception result of the ultrasonic wave of the transceiver, wherein the drive signal generation unit is configured to generate the drive signal so that frequency of the probe wave changes over time. The device further includes: a voltage measurement unit configured to measure a voltage signal generated in the transceiver while the transceiver transmits the probe wave with frequency changing over time; and a state determination unit configured to make a state determination regarding the transceiver based on the voltage signal.

A system for navigation detection and inclination measurement of advanced hydraulic supports, including a detection device module, a signal transfer transmission module, connected to the detection device module, and used to integrate ultrasonic signals and inclination signals received from all advanced hydraulic supports and then wirelessly transmit all the signals to an analysis and processing module. The analysis and processing module, connected to the signal transfer transmission module, and used to receive the signals from the signal integration and transmission device for analysis, where if an analysis result shows an abnormal situation, an alarm will b e immediately given to a worker. If the analysis result shows a continuous abnormal situation, or a relatively large value indicating the abnormal situation is generated, a command will be immediately sent to make the advanced hydraulic supports stop operating in a current mode.

An object detection apparatus applied to a vehicle having a sensor unit mounted on a predetermined member provided to the vehicle, the sensor unit being provided with an object detection sensor that detects position information of an object present around the vehicle and a tilt sensor that detects a tilt angle as inclination with respect to a predetermined direction, and performing a process of detecting the object based on the position information of the object detected by the object detection sensor, the object detection apparatus comprising a detachment state determination section that determines a detachment state of the predetermined member based on the tilt angle detected by the tilt sensor.

The present disclosure provides a ship monitoring system which makes it easy for a user to grasp a change in a risk situation. The ship monitoring system includes a first data generator, a second data generator, processing circuitry, and an alarm sounding part. The first data generator generates first ship data indicative of a position and a velocity of a first ship. The second data generator generates second ship data indicative of a position and a velocity of a second ship. The processing circuitry calculates a risk value indicative of a risk of a collision between the first ship and the second ship based on the first ship data and the second ship data. The processing circuitry generates a discontinuous sound pattern with an interval according to the risk value. The alarm sounding part sounds an alarm according to the discontinuous sound pattern.

The present disclosure provides a ship monitoring system which makes it easy for a user to grasp a change in a risk situation. The ship monitoring system includes a first data generator, a second data generator, processing circuitry, and an alarm sounding part. The first data generator generates first ship data indicative of a position and a velocity of a first ship. The second data generator generates second ship data indicative of a position and a velocity of a second ship. The processing circuitry calculates a risk value indicative of a risk of a collision between the first ship and the second ship based on the first ship data and the second ship data. The processing circuitry generates a discontinuous sound pattern with an interval according to the risk value. The alarm sounding part sounds an alarm according to the discontinuous sound pattern.

An eyesight device for the visually impaired comprises a case having a front, rear and side walls. An ultrasonic sensor is provided on at least the front wall although, preferably, ultrasonic sensors are provided on the front and side walls to provide a greater range of peripheral vision. A microcontroller within the case is coupled to the ultrasonic sensor. A power source energizes the microcontroller. An audible signal generating means is adapted to generate an audible signal. The microcontroller is programmed to receive the output of the ultrasonic sensor and computing the distance between the case and an obstacle spaced from the case and energize the audible signal generating means when the distance is less than a preselected threshold distance. Attaching means is provided for attaching the case to an item of clothing of the user to free the hands of the user.

An eyesight device for the visually impaired comprises a case having a front, rear and side walls. An ultrasonic sensor is provided on at least the front wall although, preferably, ultrasonic sensors are provided on the front and side walls to provide a greater range of peripheral vision. A microcontroller within the case is coupled to the ultrasonic sensor. A power source energizes the microcontroller. An audible signal generating means is adapted to generate an audible signal. The microcontroller is programmed to receive the output of the ultrasonic sensor and computing the distance between the case and an obstacle spaced from the case and energize the audible signal generating means when the distance is less than a preselected threshold distance. Attaching means is provided for attaching the case to an item of clothing of the user to free the hands of the user.

An ultrasonic sensor (10), that transmits probe waves which are ultrasonic waves and acquires detection waves including reflected waves which have been reflected from surrounding objects, includes a transmitter/receiver (12) that transmits the probe waves and acquires the detection waves, a detection wave processing section (13) that executes processing for passing a predetermined frequency band which includes the frequency of the probe waves, an amplitude measurement section (14) which measures the amplitude of the detection waves, and a judgement section (17) which judges whether there is adherence of foreign matter on the transmitter/receiver, based on a relationship between a time axis and values of the amplitude of the detection waves during a reverberation interval following the termination of transmitting the probe waves.