Abstract: In a work machine, when on a travel plane S of crawler belts, a straight line passing through a predicted travel point P1 a given distance from the crawler belts and having a maximum climbing angle is assumed to be a first line L1, and a line connecting an installation position of a distance sensor and the predicted travel point P1 is assumed to be a second line L2. The distance sensor measures a distance to a ground surface on the second straight line L2. A controller calculates a height H1 of a predicted travel region T based on a result of the distance sensor and a detection result of a turning angle sensor, and determines whether a height difference H3 between a height H1 of the predicted travel region T and a height H2 of the travel plane S is equal to or greater than a threshold.

Abstract: A work machine includes a second pilot line that introduces a hydraulic fluid from a pilot hydraulic fluid source to a pilot valve bypassing a first gate lock valve, a second gate lock valve that is disposed on the second pilot line and that is configured to be switched to an open position for allowing the supply of the hydraulic fluid to the pilot valve or a closed position for interrupting the supply of the hydraulic fluid, and a controller that controls the second gate lock valve on the basis of a second remote operation signal transmitted from a remote operation apparatus and that controls the pilot valve according to a first remote operation signal transmitted from the remote operation apparatus. In a state where the first gate lock valve is at a closed position, the second gate lock valve is allowed to be controlled by the controller when stairs are in a retracted state, and is kept at the closed position irrespective of the second remote operation signal when the stairs are in an extended state.

Abstract: A circuit for a displacement detector having a contact sensor with a sensor coil forming a differential transformer is disclosed. The circuit includes a driver for generating a driving signal for driving the sensor coil, a standard signal processor for processing the driving signal and outputting a standard signal, an output signal processor for processing signals outputted from the differential transformer, a differential amplifier for carrying out differential amplification of the standard signal and the output signal from the output signal processing means, and an amplitude adjustor for adjusting the amplitude of the driving signal for the sensor coil to a constant value by feeding back the standard signal to the driver.

Abstract: A displacement detector has a contact sensor incorporating a differential transformer and a circuit for adjusting the amplitude of the driving signal for driving a differential transformer of the sensor by feeding back as a standard signal the driving signal through an amplifier and an AC-DC converter as a standard signal. The sensor has a housing containing a mobile member. The mobile member has a shaft with a hole. An outer tubular body of a linear bush and a ball guide each have a hole, and a pin is inserted through these holes movably in the direction of movement of the mobile member such that the rotation of the mobile member is prevented.

Abstract: A displacement detector has a contact sensor incorporating a differential transformer and a circuit for adjusting the amplitude of the driving signal for driving a differential transformer of the sensor by feeding back as a standard signal the driving signal through an amplifier and an AC-DC converter as a standard signal. The sensor has a housing containing a mobile member. The mobile member has a shaft with a hole. An outer tubular body of a linear bush and a ball guide each have a hole, and a pin is inserted through these holes movably in the direction of movement of the mobile member such that the rotation of the mobile member is prevented.

Abstract: A displacement detector has a contact sensor incorporating a differential transformer and a circuit for adjusting the amplitude of the driving signal for driving a differential transformer of the sensor by feeding back as a standard signal the driving signal through an amplifier and an AC-DC converter as a standard signal. The sensor has a housing containing a mobile member. The mobile member has a shaft with a hole. An outer tubular body of a linear bush and a ball guide each have a hole, and a pin is inserted through these holes movably in the direction of movement of the mobile member such that the rotation of the mobile member is prevented.

Abstract: A magnetic recording medium comprises a nonmagnetic support having provided thereon a plurality of magnetic layers containing a first magnetic layer as a top layer and a second magnetic layer adjacent to the first magnetic layer. The first magnetic layer contains acicular magnetic powder and has a thickness of not more than 1.0 .mu.m; and the second magnetic layer contains sexangular plate-like magnetic powder.

Abstract: A magnetic recording medium comprises a nonmagnetic support having provided thereon a plurality of magnetic layers containing a first magnetic layer as a top layer and a second magnetic layer adjacent to the first magnetic layer. The first magnetic layer contains acicular magnetic powder and has a thickness of not more than 1.0 .mu.m; and the second magnetic layer contains sexangular plate-like magnetic powder.