초록 ▼

A displacement detector in accordance with the present invention detects the amount of displacement of an object to be measured. Sensing means are arranged side by side with predetermined spacing whose states change in response to the changes in electromagnetic energy such as light energy, magnetic

A displacement detector in accordance with the present invention detects the amount of displacement of an object to be measured. Sensing means are arranged side by side with predetermined spacing whose states change in response to the changes in electromagnetic energy such as light energy, magnetic energy, and electrical energy. An electromagnetic energy generating means and an electromagnetic energy transmitting means that is linked to the motion of the object to be measured, transmits the electromagnetic energy from the electromagnetic energy generating means to the sensing means that is situated at the position that corresponds to the displacement of the object to be measured. A conversion unit ouputs the detection signal obtained from the sensing means as a displacement detection signal, by converting the detection signal to a coded signal that is characteristic of the position of the sensing means for the position where there was a change in the electromagnetic energy. A trouble shooting unit diagnoses malfunctions by examining whether or not the change in the displacement detection signal is within the range of specified values. A rotation number measuring unit counts the number of rotations of the object to be measured based on the detection signal from the sensing means, and a maximum value screening unit screens the maximum value from among the sensor outputs when the electromagnetic energy is incident upon a plurality of sensing means.

대표청구항 ▼

A displacement detector for detecting the amount of displacement of an object to be measured, comprising: sensing means that are disposed with predetermined spacing, whose states change in response to changes in input electromagnetic energy; electromagnetic energy varying means which is arranged mov

A displacement detector for detecting the amount of displacement of an object to be measured, comprising: sensing means that are disposed with predetermined spacing, whose states change in response to changes in input electromagnetic energy; electromagnetic energy varying means which is arranged movably, linked to motion of the object to be measured, along a row of said sensing means in order to vary an amount of electromagnetic energy in said sensing means in response to a displaced amount of the object to be measured; and a signal processing circuit for converting a detector signal that is obtained from said sensing means situated at a position where the electromagnetic energy is changed by said electromagnetic energy varying means, to a coded signal which is characterized to the position of the sensing means at the position where there was a change in the electromagnetic energy, and for outputting the coded signal as a displacement detection signal; wherein said sensing means comprises a plurality of light receiving elements, said signal processing circuit comprises diode groups for generating signals that are characteristic of each of the plurality of light-receiving elements, based on the output obtained from a specified light-receiving element, a power source that is connected in series to the diode groups via load resistors, and NOT circuits that invert digital output signals from the respective load resistors that are short-circuited via the diode groups to output them as said coded signal representative of a displacement signal, based on the output from the specified light-receiving element.