Abstract: The wiper device includes a first pivot shaft, a first swing lever, a second pivot shaft, a second swing lever, a link rod, a crank arm, and a drive rod. The first swing lever extends from the first pivot shaft in a radial direction of the first pivot shaft. The second swing lever extends from the second pivot shaft in a radial direction of the second pivot shaft. The link rod has a first end connected to a tip part of the first swing lever and a second end connected to a tip part of the second swing lever. The crank arm extends from an output shaft of a motor in a radial direction of this output shaft. The drive rod has a first end connected to a tip part of the crank arm and a second end connected to an intermediate part of the link rod.

Abstract: A moving object detection apparatus in which an oscillating output, from a gate of an FET functioning as an oscillator, is coupled via a resonant line to a transmit-receive antenna, a wave, transmitted from the antenna and returned as a reflected wave, is received at the gate, and a beat signal component output from the gate, due to a phase difference between the transmitted wave and the reflected wave, is taken as a moving object detection signal.

Abstract: A moving object detection apparatus in which an oscillating output, from a gate of an FET functioning as an oscillator, is coupled via a resonant line to a transmit-receive antenna, a wave, transmitted from the antenna and returned as a reflected wave, is received at the gate, and a beat signal component output from the gate, due to a phase difference between the transmitted wave and the reflected wave, is taken as a moving object detection signal.

Abstract: FM-CW radar equipment to solve a conventional problem of failure detection caused by the carrier level of amplitude modulation dispersing too largely to adjust to a constant level within a criterion range. A novel method is applied based on that a noise level greatly varies on occurrence of a failure in radio-frequency circuit. A failure can be detected by comparing the varied noise level with a noise level in normal condition. using this method, FM-CW radar equipment can be configured with a simple structure for detecting a failure in transmission/reception circuit. The equipment provides with a noise-level extraction circuit in radio-frequency circuit, and a comparator for comparing an output of the noise-level extraction circuit with a predetermined criterion value. An alarm is output when the comparator detects the output of the noise-level extraction circuit decreases to less than the predetermined criterion value.

Abstract: FM-CW radar equipment to solve a conventional problem of failure detection caused by the carrier level of amplitude modulation dispersing too largely to adjust to a constant level within a criterion range. A novel method is applied based on that a noise level greatly varies on occurrence of a failure in radio-frequency circuit. A failure can be detected by comparing the varied noise level with a noise level in normal condition. Using this method, FM-CW radar equipment can be configured with a simple structure for detecting a failure in transmission/reception circuit. The equipment provides with a noise-level extraction circuit in radio-frequency circuit, and a comparator for comparing an output of the noise-level extraction circuit with a predetermined criterion value. An alarm is output when the comparator detects the output of the noise-level extraction circuit decreases to less than the predetermined criterion value.

Abstract: In a structure adopted for an FM-CW radar, a corner waveguide for connecting each of transmission and reception antennas to a sensor unit is integrated with a sensor unit case. In a waveguide/strip line converter for converting the transmission mode between the waveguide and the strip lines in the circuits of the sensor unit, a ditch is dug in the inner wall of an opening of the waveguide in order to prevent oozing of conductive adhesive. The strip line board is abutted on the inner wall of the waveguide in order to restrict a length of a projecting portion of a line conductor on the strip line board. By employing an oscillator mixer or a multiplier mixer, the circuitry in the sensor unit can be simplified without using lots of expensive millimeter wave devices. Furthermore, power can be utilized effectively even when a switching radar is off, which enables measurement of an absolute speed. Moreover, cost reduction can be achieved.

Abstract: A continuous wave radar for detecting a relative velocity between a target and a mobile object where the radar is loaded, and for detecting whether the mobile object is relatively approaching to or separating from the target. The radar has a hybrid circuit for branching an oscillation signal of a fixed frequency outputted from an oscillator into two oscillation signals. A transmitting antenna is provided for irradiating one of the oscillation signals branched by the hybrid circuit, and a receiving antenna is provided for receiving radio waves reflected from the target. The continuous wave radar further has an image cancel mixer for detecting, on the basis of the frequency of the other oscillation signal branched by the hybrid circuit, a first signal of an upper sideband frequency and a second signal of a lower sideband frequency of the received signal obtained via the receiving antenna.