摘要:
A control/monitor signal transmission system that employs a transmission synchronization scheme in which a master station connected to a single control unit and a plurality of slave stations corresponding to a plurality of controlled apparatuses synchronize with each other through a transmission clock and data is transmitted therebetween over a common data signal line, a transmission line disconnection detection method that enables a disconnection of a transmission line to be detected precisely; and a slave station that is used for this method. A continuous pulse signal that the master station outputs to the common data signal line is provided with a management data region that includes a plurality of pulse signals and that differs from a control/monitor data region including data of a control data signal and data of a monitor data signal.
摘要:
A contactless switch structure is provided that may turn on and off an electrical signal in a contactless manner, allow a worn operating portion in the structure to be easily replaced, and prevent decrease of the sensitivity caused by foreign material such as dust. A contactless switch structure according to the invention includes a replaceable member to be detachably set to a target portion to which the contactless switch structure is to be set, the replaceable member having an aperture at an end section thereof and a virtual boundary defined by the aperture at the end section; and a detection element and a detector closely opposed across the virtual boundary in the normal state, the detection element and the detector being placed on the replaceable member side and the target portion side of the virtual boundary, respectively.
摘要:
Disclosed are a photoelectric sensor and a photoelectric sensor system capable of accurately detecting an object without being affected by disturbance even though the object is very thin. A photoelectric sensor according to an embodiment of the invention includes a light emitting unit and a light receiving unit. The photoelectric sensor detects whether there is an object between the light emitting unit and the light receiving unit based on a variation in the intensity of a light signal received by the light receiving unit. The light receiving unit receives a light signal that is emitted from the light emitting unit to the light receiving unit without intersecting the object and a light signal that is emitted from the light emitting unit to the light receiving unit through the object, and is operated in synchronization with a light emission timing signal of the light emitting unit. The intensity of the received light signal that is not attenuated by the object is compared with the intensity of the received light signal that is attenuated by the object to detect information indicating whether there is the object.
摘要:
A photoelectronic sensor collectively adjusts the light emission intensity of plural light emitting elements and the light reception sensitivity of plural light receiving elements automatically or manually. In order to collectively adjust the light emission intensity of plural light emitting elements and the light reception sensitivity of single light receiving elements automatically, a photoelectronic sensor is configured such that constant current light emission signals are applied to the light emitting elements. Additionally, a light amount of the environment is measured by the light receiving elements and stored, and a reflection light amount from a body to be measured is stored. Furthermore, signal intensities indicating the respective light amounts are calculated, and optimal thresholds of light emission intensity and light reception sensitivity are provided automatically or manually, so that setting of sensor sensitivity is performed.
摘要:
An ON/OFF switch of a non-contact type provided with a lever switch excellent in operability, which can be inclined in any direction in a whole circumferential direction is provided. One end of a cylindrical member having flexibility and being stretchable so as to be freely restored to a normal state is fixed to a base member, and a rod member having flexibility is inserted into the cylindrical member and is supported by a guide maintaining a state of an axial line of the rod member to the cylindrical member regardless of the state of the cylindrical member. Further, one end of the rod member is fixed to an end portion of the cylindrical member which is not fixed to the base member while the other end thereof is protruded from the cylindrical member, and a surrounding portion surrounding the end portion of the rod member which is protruded from the cylindrical member in a non-contact manner is provided in the base member. A converting unit converting movement of the end portion of the rod member protruded from the cylindrical member relative to the surrounding portion to electrical signal binary to output two values of the binary is provided in the surrounding portion.
摘要:
Address setting and initial data setting of an oil-resistant, water-resistant control/monitor terminal for performing address setting and initial setting of control/monitor terminals of a transmission control system in an oil-mist or humid environment. Also provided is optical communications or electromagnetic induction through a light transmission window provided in the control/monitor terminal using a data-setting-circuit-equipped console.
摘要:
A master station has a master-station transmission circuit that extracts a serial monitor signal so as to convert a control data signal into monitor data by changing a duty ratio of negative and positive voltage-level periods, converting the control signal into a serial pulsing voltage signal, transmitting a monitor data signal that is superimposed on the serial pulsing voltage signal, and detecting the presence or absence of a signal of a current that flows during the negative and positive voltage-level periods. A plurality of slave stations respectively have a slave-station transmission circuit that identifies a duty ratio of the positive and negative voltage-level periods relative to each serial pulsing voltage signal, that extracts a control data signal so as to output the data to a controllable unit of the slave station.
摘要:
A control/monitor signal transmission system that employs a transmission synchronization scheme in which a master station connected to a single control unit and a plurality of slave stations corresponding to a plurality of controlled apparatuses synchronize with each other through a transmission clock and data is transmitted therebetween over a common data signal line, a transmission line disconnection detection method that enables a disconnection of a transmission line to be detected precisely; and a slave station that is used for this method. A continuous pulse signal that the master station outputs to the common data signal line is provided with a management data region that includes a plurality of pulse signals and that differs from a control/monitor data region including data of a control data signal and data of a monitor data signal.
摘要:
A master station has a master-station transmission circuit that extracts a serial monitor signal so as to convert a control data signal into monitor data by changing a duty ratio of negative and positive voltage-level periods, converting the control signal into a serial pulsing voltage signal, transmitting a monitor data signal that is superimposed on the serial pulsing voltage signal, and detecting the presence or absence of a signal of a current that flows during the negative and positive voltage-level periods. A plurality of slave stations respectively have a slave-station transmission circuit that identifies a duty ratio of the positive and negative voltage-level periods relative to each serial pulsing voltage signal, that extracts a control data signal so as to output the data to a controllable unit of the slave station.
摘要:
An intermediate station transmits a supervisory signal sent form a given controlled device to a controlled device associate with the given device as a control signal. An intermediate-station input unit extracts a supervisory signal, which is a current signal superimposed on a signal transmitted through a data signal line, in every clock cycle. An intermediate-station output unit obtains the supervisory signal in every clock cycle, and outputs a control signal, which is a pulse-width-modulated voltage signal, onto the data signal line in the same clock cycle in which the supervisory signal has been extracted.