Kubota Corporation

Hitoshi Kimura

Shigeo Yoshimura

Renshiro Ishino

Shiro Takada

Hisataka Takahama

Yoshiaki Shimada

A device for measuring torque in a shaft without contacting the latter. A torque transmitting shaft is formed with at least one detecting magnetically anisotropic region inclined to form an angle with respect to the axis of rotation of this shaft. A detecting coil is disposed on the periphery of the detecting magnetically anisotropic region. When the detecting voltage for the detecting coil changes owing to temperature changes and time-dependent changes, the changes in the detection sensitivity and in the zero point take place, leading to errors during torque measurement. Correct measured values can be obtained by having a device for correcting such changes in sensitivity and zero point.

Torque measure device

Torque measuring device

Magnetically anisotropic torque measuring device with error correction

A load cell (24, 31, 40, 51, 58, 62, 64, 68, 92, 96, 97) having flame proof function has a load cell body (2) and a flame proof enclosure (25, 33, 36, 41, 69, 78) for covering at least a strain gage carrying portion (5) of the load cell body (2). A load receiving portion (4) connected with the strain gage carrying portion (5) for transmitting a load to the strain gage carrying portion, projects outwardly from the flame proof enclosure. A gap (30) is defined between a first surface of the load cell body and a second surface of the enclosure, so that the load receiving portion (4) and the strain gage carrying portion (5) are freely movable relative to the enclosure. The size of the gap width W.sub.1 and of the gap length L.sub.1 are selected for realizing the flame proof function.

Load cell having flameproof function

An apparatus for cumulatively measuring the weight of a continuous bulk material conveyed by a belt conveyer, comprising; a pulse generator operatively coupled to the conveyer for generating pulses of the frequency associated with the conveyer speed; a decimal counter for counting the speed associated pulses; a full scale detector coupled to the decimal counter; a load cell operatively coupled to the conveyer for providing an analog signal representative of the weight of the material within a predetermined span of the conveyor; an analog-to-digital converter responsive to the full scale output for converting the analog signal into a bit parallel coded digital signal; logical processing means for modifying the number of pulses obtainable from the decimal counter within one full scale of the counter as a function of the bit parallel coded digital signal and a cumulative counter for counting the pulses thus modified of the pulse number. Preferably, the decimal counter, the logical processing means and the analog-to-digital converter each comprises the most significant digit portion and the less significant digit portions, and the outputs from the most and less significant digit portions of the decimal counter are separately withdrawn for processing to be applied to the cumulative counter, whereby high precision of measurement is attained with a simplified structure.

Apparatus for measuring weight of bulk material conveyed by belt conveyor

Growing community of inventors

Yao, Japan

Hitoshi Kimura