Abstract: A lock controller has main apparatus provided to a lockable door and a detector for detecting an approaching or retreating target object. The detector includes an oscillator device for generating a transmission wave, a branching device for branching the transmission wave, a transmission device for transmitting the transmission wave into space as electromagnetic waves, a reception device for receiving the transmission wave reflected by the target object, a mixer for mixing a reception signal received by the reception device and a branched signal branched by the branching device to output a mixed signal, and a judging device for switching on a detection output indicating the target object approaching and retreating based on an increase and a decrease of the mixed signal outputted from the mixer. A detection distance is set within ¼ wavelength of frequency effective for the detection.

Abstract: A lock controller has main apparatus provided to a lockable door and a detector for detecting an approaching or retreating target object. The detector includes an oscillator device for generating a transmission wave, a branching device for branching the transmission wave, a transmission device for transmitting the transmission wave into space as electromagnetic waves, a reception device for receiving the transmission wave reflected by the target object, a mixer for mixing a reception signal received by the reception device and a branched signal branched by the branching device to output a mixed signal, and a judging device for switching on a detection output indicating the target object approaching and retreating based on an increase and a decrease of the mixed signal outputted from the mixer. A detection distance is set within ¼ wavelength of frequency effective for the detection.

Abstract: A lock controller for automatically unlocking and locking a lockable part such as a vehicle door uses a detector for detecting a hand approaching inside a plurality of detection areas. Such a detector is not only arranged to transmit electromagnetic waves and to receive the reflected waves from a target object of detection such as a person's hand but also provided with a plurality of wave detection circuit parts for mixing wave detection signals corresponding to said transmission waves with signals received by said reception antenna at different sampling timings and outputting the mixed signals. A plurality of judging circuit parts each correspond to different one of the wave detection circuit parts and serve to switch on a detection output based on the outputted signals from said wave detection circuit parts to indicate that said target object is approaching and at a speed within a specified range.

Abstract: A plurality of primary detection regions A to I are scanned by switching a beam width and a beam direction of an antenna. The primary detection regions A to I are formed such that one detection region overlaps at least one of other detection regions. A small region (any one of secondary detection region (1) to (14)) corresponding to a region provided by excluding a region corresponding to a sum of set of the detection regions where a detection object was not detected, from a region corresponding to a product set of the primary detection regions where the object was detected is specified as a bearing in which the object exists, based on detection results of the respective primary detection regions.

Abstract: Beams are irradiated in three directions by switching an irradiation direction of a mainlobe of an antenna by stages, and an echo is received from a detection object obtained in the mainlobe or a sidelobe in each irradiation direction. Then, reflection power intensity in each irradiation direction is found from the received echo, and pattern of relative variation of the reflection power intensity (power intensity pattern) in each irradiation direction is generated. Meanwhile, a detection region is divided into seven bearings “c” to “i” and a power intensity pattern when an object exists in each bearing is previously stored as a reference pattern in each bearing. Then, the bearing in which the detection object exists is specified by comparing the power intensity pattern obtained from the received echo with the reference pattern in each bearing.

Abstract: A pulsed transmitted signal is generated, the transmitted signal is injected as electromagnetic waves, a reflected signal is received from an object on which the transmitted signal is incident, the reflected signal is sampled after a prescribed delay time from the emission of the transmitted signal, and the sampling value is compared with a threshold, to determine the presence of the object and output the determination result.

Abstract: A sensor for detecting a specific object (such as a hand) excellent in operation reliability and response, further excellent in mountability (dominance such as in size. and design) on a vehicle, and much less in power consumption than conventional impulse radars. The object sensor comprises detecting wave transmitting means and reflected wave receiving means of an impulse radar and a judging circuit part (40) for turning on the detection output when the amplitude level of a signal component, in a frequency range corresponding to the moving speed range of a specific object, of a signal received by the reflected wave receiving means lies in a predetermined range corresponding to the reflection characteristics of the specific object.

Abstract: A lock controller has main apparatus provided to a lockable door and a detector for detecting an approaching or retreating target object. The detector includes an oscillator device for generating a transmission wave, a branching device for branching the transmission wave, a transmission device for transmitting the transmission wave into space as electromagnetic waves, a reception device for receiving the transmission wave reflected by the target object, a mixer for mixing a reception signal received by the reception device and a branched signal branched by the branching device to output a mixed signal, and a judging device for switching on a detection output indicating the target object approaching and retreating based on an increase and a decrease of the mixed signal outputted from the mixer. A detection distance is set within ¼ wavelength of frequency effective for the detection.

Abstract: A lock controller for automatically unlocking and locking a lockable part such as a vehicle door uses a detector for detecting a hand approaching inside a plurality of detection areas. Such a detector is not only arranged to transmit electromagnetic waves and to receive the reflected waves from a target object of detection such as a person's hand but also provided with a plurality of wave detection circuit parts for mixing wave detection signals corresponding to said transmission waves with signals received by said reception antenna at different sampling timings and outputting the mixed signals. A plurality of judging circuit parts each correspond to different one of the wave detection circuit parts and serve to switch on a detection output based on the outputted signals from said wave detection circuit parts to indicate that said target object is approaching and at a speed within a specified range.

Abstract: Beams are irradiated in three directions by switching an irradiation direction of a mainlobe of an antenna by stages, and an echo is received from a detection object obtained in the mainlobe or a sidelobe in each irradiation direction. Then, reflection power intensity in each irradiation direction is found from the received echo, and pattern of relative variation of the reflection power intensity (power intensity pattern) in each irradiation direction is generated. Meanwhile, a detection region is divided into seven bearings “c” to “i” and a power intensity pattern when an object exists in each bearing is previously stored as a reference pattern in each bearing. Then, the bearing in which the detection object exists is specified by comparing the power intensity pattern obtained from the received echo with the reference pattern in each bearing.

Abstract: A plurality of primary detection regions A to I are scanned by switching a beam width and a beam direction of an antenna. The primary detection regions A to I are formed such that one detection region overlaps at least one of other detection regions. A small region (any one of secondary detection region (1) to (14)) corresponding to a region provided by excluding a region corresponding to a sum of set of the detection regions where a detection object was not detected, from a region corresponding to a product set of the primary detection regions where the object was detected is specified as a bearing in which the object exists, based on detection results of the respective primary detection regions.

Abstract: A transmitter-receiver antenna of a radar is prepared as a parabolic antenna, and a wave reflector is constituted by a reflector array having a plurality of reflectors, and multiple beam widths of a transmission wave in the vicinity of the radar and a reflected wave in the vicinity of the electric wave reflector are set to be greater than a beam width C that can be blocked by a non-detection subject, such as a bird, that is excluded from detection subjects. Thus, it becomes possible to improve the identifying precision between the detection subject and the non-detection subject, and consequently to provide an immersion object detection device with high reliability that can reduce erroneous detections.

Abstract: To provide an immersion object detection system capable of detecting an immersion object within a detection target area and specifying a position thereof irrespective of a short distance/long distance. A millimeter wave is irradiated to a detection area from a millimeter-wave RF unit through an antenna unit, and the reflected wave is detected. In the case that an immersion object exists in a short-distance area from a radar unit, the directly reflected waves from the immersion object is analyzed, thereby specifying the position of the immersion object, and in the case that the immersion object exists in a long-distance area from the radar unit, the position of the immersion object is specified in accordance with the position of the reflection member which cannot detect among the group of reflection members placed within the detection area.

Abstract: In a semiconductor integrated device having floating voltage portion pairs, a signal line crossing over or under the floating voltage portion pairs, and a non-floating voltage portion, a noise source equivalent to the signal line is provided between the floating voltage pairs and the non-floating voltage portion.