Alpine Electronics, Inc.

Toshiaki Takahashi

Tokio Suzuki

A motion detecting device comprises an encoder for generating two signals of A phase and B phase, 90.degree. out of phase with each other, when a member being measured is subject to an inclination or swaying. A pulse generation section generates a positive pulse or a negative pulse, depending on the direction of the inclination, at each of the leading and trailing edges of the A phase and B phase signals. An up/down counter counts up or down the positive or negative pulses, respectively, and an inclination detection section outputs an inclination generation signal when the member being measured is sufficiently inclined, in either a positive or negative direction, so as to cause a counter value to be above a first set value or below a second set value.

Magnetic motion sensing device for sensing inclination and swaying

A motion sensor unit which includes a sensor assembly for monitoring whether or not the inclination of a mobile member is in excess of a predetermined reference angle and outputting a pulse signal in case the inclination is greater than the reference angle; a detector for monitoring whether or not the duration of the pulse signal is in excess of a predetermined reference time and, in the case of any excess, outputtting a signal representing that the inclination of the mobile member is greater than the reference angle and is continuous for more than the reference time; a sensor assembly for outputting a pulse signal inverted in accordance with the value of a shock given to the mobile member; and a detector for monitoring whether or not the cycle of the pulse signal is shorter than a predetermined reference time and outputting a shock detection signal when the cycle is shorter than the reference time. Due to the above constitution, the motion sensor unit is capable of controlling the shock detection sensitivity continuously and independently without altering the detection sensitivity for any jolt or inclination.

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Iwaki, Japan

Toshiaki Takahashi