Abstract: An angle detection method for a bending machine for detecting a bending angle of a bent workpiece and an angle detection apparatus and an angle sensor thereof are provided. A detection light is emitted toward a workpiece from a light source while the angle sensor is rotated in the forward and reverse directions. A plurality of optical sensors arranged at mutually symmetrical positions with the light source being at the center thereof receive the reflection light from the measurement object. The quantity of received light is stored in relation to the rotation angle of the angle sensor detected by a rotation angle detector. An angle calculation portion calculates the angle of the measurement object based on the peak values of the data of the quantity of the received light and the rotation angles of the angle sensor corresponding to the peak values.

Abstract: An angle detection method for a bending machine for detecting a bending angle of a bent workpiece and an angle detection apparatus and an angle sensor thereof are provided. A detection light is emitted toward a workpiece from a light source while the angle sensor is rotated in the forward and reverse directions. A plurality of optical sensors arranged at mutually symmetrical positions with the light source being at the center thereof receive the reflection light from the measurement object. The quantity of received light is stored in relation to the rotation angle of the angle sensor detected by a rotation angle detector. An angle calculation portion calculates the angle of the measurement object based on the peak values of the data of the quantity of the received light and the rotation angles of the angle sensor corresponding to the peak values.

Abstract: An angle detection method for a bending machines for detecting a bending angle of a bent workpiece and an angle detection apparatus and an angle sensor thereof are provided. A detection light is emitted toward a workpiece W from a light source 9 while the angle sensor 3 is rotated in the forward and reverse directions. A plurality of optical sensors 11, 13 arranged at mutually symmetrical positions with the light source 9 being at the center thereof receive the reflection light from the measurement object W. The quantity of received light is stored in relation to the rotation angle of the angle sensor 3 detected by an rotation angle detector 33. A angle calculation portion 35 calculates the angle of the measurement object W based on the peak values of the data of the quantity of the received light and the rotation angles of the angle sensor 3 corresponding to the peak values.

Abstract: A method and an apparatus capable of accurately measuring the three-dimensional position and orientation of an object in a short data processing time are provided, wherein a first slit light is projected from a first light projector for scanning an object, and each light image is obtained by a CCD camera. Similarly, a second slit light is projected from a second light projector for scanning the object and each light image is obtained by the CCD camera. The first and second slit lights are perpendicular to each other. The individual images obtained are processed to find a bent point and a disconnection point in each slit-light scan image. From among these points, a group of points which are reckoned to be lying on the same straight line is extracted, and the obtained straight line of points is used as edge information of the object. Based on the edge information and shape data of the object, three-dimensional position/orientation data is obtained.

Abstract: A numerical control method and apparatus for controlling the movement of a movable member by setting entry forbidden areas which the movable member is forbidden to enter. Entry forbidden information relating to the boundaries of the entry forbidden areas is created and stored in memory, the current position of the movable member is monitored, the entry forbidden information is used to determine whether the current position of the movable member has entered a forbidden area, and the movement of the movable member is halted when the current position thereof has entered an entry forbidden area.

Abstract: A numerical control apparatus for a machine tool (4) comprises a transmitting circuit (43) for transmitting each block of machining information to an abnormal operation monitoring apparatus (6), which comprises a receiving circuit (61) for receiving each of said blocks of machining information and a decoding circuit (63) for decoding the content of said received blocks of machining information, thereby, as the machining proceeds by each one block, data indicating the content of said block and a signal indicating the termination of execution of the machining operation defined in said block are supplied from said numerical control apparatus (4) to said abnormal operation monitoring apparatus (6) and said content of each block of machining information is decoded in said abnormal operation monitoring apparatus (6).