Honda Electronics Co., Ltd.

Yoshiyuki Asakura

Kenji Moriyama

Yoshikazu Maramatsu

Shigefumi Goto

Nagaya Okada

Yoshinobu Okubo

A sound-pressure analyzer in a high-intensity acoustic field that can accurately presume the cavitation-threshold and cavitation-amount being generated comprises: a hydrophone for transferring a voltage-signal corresponding to said sound-pressure in said acoustic field; a frequency-analyzer; and an arithmetic device. The frequency-analyzer analyzes the frequency-component in such an acoustic field based on the voltage-signal being transferred from the hydrophone and then sorts such signal into a basic-frequency component, a harmonic component, a sub-harmonic component and a white-noise component. An arithmetic device conducts arithmetic operations to evaluate the average of broadband sound pressure (ABP) of the white-noise component within a frequency-range having practical sensitivity, thus presuming the presence of the cavitation-threshold and the cavitation-amount being generated at a point wherein the ABP increases from about zero and wherein such cavitation-amount being generated is according to the level of the ABP value.

Sound-pressure analyzer and a method in the high-intensity acoustic field, and an ultrasonic cleaner and an ultrasonic processor

A flasher type fish sonar includes an ultrasonic vibrator transmitting and receiving ultrasonic waves in water, a transmitting circuit supplying oscillating signals to the ultrasonic vibrator, a receiving circuit amplifying reflected signals received by the ultrasonic vibrator, an A/D converter converting the reflected signals to digital signals, an input circuit receiving the digital signals from the A/D converter through a control circuit, a flasher display including a rotary disk having a rotated luminous body and a display board having a window displaying luminosity of the luminous body in response to the digital signals from the input circuit through brushes and slip rings, and a constant current circuit in the input circuit which eliminates changes of electric current flowing to the luminous body due to contact resistance between the slip rings and the brushes.

Flasher type fish sonar

Two digital reflectional signals of different depth ranges are displayed on two divided pictures in a display, whereby the conditions of the water and the bottom in the lake or pond can be detected. Therefore, the fish sonar is suitable for fishing for black bass.

Growing community of inventors

Aichi, Japan

Yoshiyuki Asakura