Abstract: A failure detecting device of a fault detection system includes a detection time calculator, which calculates a stroke time T3 required for a piston to travel between one end and another end of an actuator based on detection signals from a first sensor and a second sensor, a statistical processor that performs a predetermined statistical calculation with respect to the stroke time T3, and a fault response detector, which detects whether or not a fault of the actuator has occurred based on a processing result of the statistical processor.

Abstract: An industrial wireless communications system includes a PLC that performs at least monitoring within an industrial facility, at least one master wireless device connected to the PLC by a fieldbus, a plurality of slave wireless devices, which are installed corresponding to respective hardware devices, and carry out wireless communications with the master wireless device, a connection processing unit that carries out a connection process wirelessly between the master wireless device and the slave wireless devices, and a transmission/reception processing unit that transmits and receives data wirelessly between the master wireless device and the slave wireless devices.

Abstract: A number n of Hall elements of a position detecting device output analog detection signals responsive to magnetism from a magnet of a piston. A number n of AD converters carry out analog to digital conversion to convert the analog detection signals into digital detection signals. A ladder circuit receives, as an n-bit digital signal, the digital detection signals output from a number n of magnetic detectors, and performs digital to analog conversion thereof into a single analog output signal. A control IC detects an approximate position of the piston on the basis of the single analog output signal that is input thereto.

Abstract: A detecting unit detects a first output signal and a second output signal, which are output by a first sensor and a second sensor disposed on an actuator, and outputs a first detection signal and a second detection signal to a measurement unit. Based on the first detection signal and the second detection signal, the measurement unit measures a tact time taken for a piston to move from one end to another end of a movement range.

Abstract: In a position measurement apparatus and a positioning measuring method, an image capturing element having an imaging region of a dimension smaller than that of a workpiece is moved relatively over a surface of the workpiece while an image on the surface of the workpiece is captured. In addition, a pattern on the surface of the workpiece is extracted from an image (I(t)) inside the imaging region, and a displacement amount of the pattern occurring in the image (I(t+1)) inside the imaging region is detected. A position on the surface of the workpiece is measured based on the detected displacement amount and the dimension.

Abstract: A failure detecting device of a fault detection system includes a detection time calculator, which calculates a stroke time T3 required for a piston to travel between one end and another end of an actuator based on detection signals from a first sensor and a second sensor, a statistical processor that performs a predetermined statistical calculation with respect to the stroke time T3, and a fault response detector, which detects whether or not a fault of the actuator has occurred based on a processing result of the statistical processor.

Abstract: In a position measurement apparatus and a positioning measuring method, an image capturing element having an imaging region of a dimension smaller than that of a workpiece is moved relatively over a surface of the workpiece while an image on the surface of the workpiece is captured. In addition, a pattern on the surface of the workpiece is extracted from an image (I(t)) inside the imaging region, and a displacement amount of the pattern occurring in the image (I(t+1)) inside the imaging region is detected. A position on the surface of the workpiece is measured based on the detected displacement amount and the dimension.

Abstract: A positioner and method for generating an output signal for setting a controlled object to a control condition corresponding to an input signal, including a memory unit for storing a conversion relation for converting the input signal to a command signal; a signal conversion unit for converting the input signal to the command signal based on the conversion relation; a control unit for generating the output signal for controlling the controlled object corresponding to the command signal; and a setting unit for adjusting the command signal to obtain a desired control condition for each of a plurality of selected input signals, thereby generating a modified conversion relation between the input signal and the command signal. The modified conversion relation generated by the setting unit is stored in the memory unit as the conversion relation.

Abstract: When a steplike reference signal is supplied while a switch is open, an offset signal for compensating for the dead time of a pneumatic device is generated by an offset generator and supplied as a manipulated variable for the pneumatic device. When a feedback increases in level and a speed higher than a reference speed is detected by a speed detector, the switch is closed by a switching signal, switching from a PD control mode to a PID control mode. The pneumatic device thus controlled has a reduced response time and can made a quick response.

Abstract: When a reference signal is changed stepwise, a switch is open, and a pneumatic device with a dead time starts being actuated in a PD control mode. After elapse of the dead time, when a controlled variable changes and a position detector produces an output signal, a speed signal which is a differential of a feedback signal changes from a value "0". When a speed detector detects when the speed signal is equal to or greater than a predetermined value, a switching signal is applied to close the switch. After the switch is closed, the pneumatic device is actuated in a PID mode. An overshoot or an oscillation in a controlled variable due to the integration of the dead time in an I control mode can be suppressed.