Abstract: In a relay unit, a sensor-side communication controller acquires setting information from a synchronization line and stores the acquired setting information in a storage unit in response to reception of a backup instruction from a communication master by a master-side communication controller. The sensor-side communication controller outputs the setting information stored in the storage unit to the synchronization line via a branch line in response to reception of a restoration instruction from the communication master by the master-side communication controller. The sensor-side communication controller periodically or aperiodically compares the setting information transmitted through the synchronization line with the setting information of the storage unit so as to detect presence or absence of a difference. The master-side communication controller outputs a notification signal to the communication master in response to detection of the difference.

Abstract: A laser marker device (11) includes: a free running counter (16) configured to output a free count value (Cf) obtained by counting the number of pulses of a pulse signal; a FIFO memory (15) configured to sequentially store the free count value as a trigger timing count value every time a trigger signal (tr) is output from a trigger sensor (13); a printing control unit (17, 18) configured to sequentially read out the trigger timing count value from the memory in order of storage, recognize a position of a workpiece to be printed next, and perform printing processing with respect to the workpiece if the workpiece is conveyed to the printing position.

Abstract: A liquid sensor is configured to detect presence or absence of a liquid in a tube having a light-transmitting property. The liquid sensor includes a main body case including an elastic piece configured to hold the tube such that the tube is allowed to be inserted therein and extracted therefrom in a direction perpendicular to a longitudinal direction of the tube, a light projecting unit configured to irradiate the tube with detection light, and a light receiving unit configured to receive the detection light that has passed through the tube. A holding member configured to cover the tube in an insertion and extraction direction of the tube is attachable to and detachable from the main body case only in a direction that is not identical with the insertion and extraction direction of the tube.

Abstract: In a case made of resin and provided with a condensing lens through which light is transmitted, a circuit board on which a photoelectric element to be disposed at the focus position of the condensing lens is accommodated. The circuit board has a through hole through which the light having been transmitted through the condensing lens passes. Furthermore, the photoelectric element is mounted on the back face of the circuit board on the opposite side of the condensing lens and receives the light having passed through the through hole.

Abstract: A multi-optical axis photoelectric sensor includes: a pair of body-side packings which seal between a body housing and both side edges of a light transmissive plate; first packings which seal between caps and the side edges of the light transmissive plate, and between the caps and end portions of the light transmissive plate, and which are connected to the pair of body-side packings; and second packings which are integrally molded with the first packings, respectively, and which seal between the caps and the body housing.

Abstract: A liquid sensor is configured to detect presence or absence of a liquid in a tube having a light-transmitting property. The liquid sensor includes a main body case including an elastic piece configured to hold the tube such that the tube is allowed to be inserted therein and extracted therefrom in a direction perpendicular to a longitudinal direction of the tube, a light projecting unit configured to irradiate the tube with detection light, and a light receiving unit configured to receive the detection light that has passed through the tube. A holding member configured to cover the tube in an insertion and extraction direction of the tube is attachable to and detachable from the main body case only in a direction that is not identical with the insertion and extraction direction of the tube.

Abstract: An ultraviolet light irradiation apparatus includes: a head including an ultraviolet LED; and a controller. The ultraviolet light irradiation apparatus further includes: a current detection resistor which is electrically connected to the ultraviolet LED and detects a current flowing through the ultraviolet LED. The controller includes: a power setting unit which sets an output power such that the ultraviolet LED emits ultraviolet light intermittently or in plural steps; a current adjustment unit which adjusts the current supplied to the ultraviolet LED according to the output power set by the power setting unit; and an output voltage supply unit which supplies a voltage to the ultraviolet LED. The output voltage supply unit adjusts the voltage supplied to the ultraviolet LED according to the current that is supplied to the ultraviolet LED and adjusted according to the output power set by the power setting unit.

Abstract: In a case made of resin and provided with a condensing lens through which light is transmitted, a circuit board on which a photoelectric element to be disposed at the focus position of the condensing lens is accommodated. The circuit board has a through hole through which the light having been transmitted through the condensing lens passes. Furthermore, the photoelectric element is mounted on the back face of the circuit board on the opposite side of the condensing lens and receives the light having passed through the through hole.

Abstract: A multi-optical axis photoelectric sensor includes: a pair of body-side packings which seal between a body housing and both side edges of a light transmissive plate; first packings which seal between caps and the side edges of the light transmissive plate, and between the caps and end portions of the light transmissive plate, and which are connected to the pair of body-side packings; and second packings which are integrally molded with the first packings, respectively, and which seal between the caps and the body housing.

Abstract: A laser processing machine includes: a laser oscillator which emits laser light; a scanning unit which scans a processing target surface of a work by deflecting the laser light emitted from the laser oscillator; and a focusing unit which is disposed between the laser oscillator and the scanning unit and which focuses the laser light emitted from the laser oscillator. The focusing unit is set so as to focus the laser light at a second position that is more distant from a first position where the laser light is incident vertically than a third position that is farthest from the first position in the processing target surface of the work.

Abstract: An object of the invention is to provide a programmable controller and a program development support device capable of changing functions easily. Input sections and logical sections that can be selected as output sources of signals to be operated in each of logical sections are determined in advance. The logical sections that can be selected as output sources of signals to be output from output sections are also determined in advance. Contents that can be set as contents of a logical operation in each of the logical sections are also determined in advance. The number of logical sections is also determined in advance. An operator determines the output sources and the contents of logical operations from determined ranges to complete a program for operating a PLC (10).

Abstract: In a displacement sensor, first polarization state light from a light projector is transmitted by a first splitting member and rotated by a first polarization rotation member to third polarization state light. The third polarization state light is transmitted by a second splitting member to a reflecting member, and is rotated by a second polarization rotation member to fourth polarization state light. The fourth polarization state light passes through the second splitting member to a measurement target, then passes through the second splitting member to the reflecting member, and then is rotated by the second polarization rotation member to third polarization state light. The third polarization state light passes through the second splitting member, and is rotated by the first polarization rotation member to second polarization state light. The second polarization state light is transmitted by the first splitting member to a light receiver.

Abstract: A laser processing machine includes: a laser oscillator which emits laser light; a scanning unit which scans a processing target surface of a work by deflecting the laser light emitted from the laser oscillator; and a focusing unit which is disposed between the laser oscillator and the scanning unit and which focuses the laser light emitted from the laser oscillator. The focusing unit is set so as to focus the laser light at a second position that is more distant from a first position where the laser light is incident vertically than a third position that is farthest from the first position in the processing target surface of the work.

Abstract: A discharge electrode that generates ions when supplied with a voltage includes a first part, a second part, and a third part. The first part includes a basal end and a distal end. The second part includes a basal end, which is continuous with the distal end of the first part, and a distal end. The third part includes a basal end, which is continuous with the distal end of the second part, and a convex surface defining a distal surface of the discharge electrode. The first to third parts are formed integrally. The basal end of the first part is wider than the distal end thereof. The second part is rod-shaped and has a width that is constant from the distal end to the basal end of the second part. The width of the second part is the same as that of the basal end of the third part.

Abstract: A heat sink is thermally connected to a substrate on which LED elements are mounted. A fan unit is arranged near the distal end of a fin segment of the heat sink. A vent hole is formed in a case so as to expose the base end of the fin segment entirely in a direction in which fins are aligned. The heat sink is configured such that a gap between the fins is substantially blocked in a part except where the vent hole is present. The gap is an opening extending in a width direction perpendicular to the direction in which the fins are aligned. Space between the distal end of the fin segment and the fan unit functions as a pressure chamber that is placed in a positively pressurized condition or a negatively pressurized condition by cooling air traveling from the fan unit.

Abstract: In a memory unit 6, there is stored a correction table for each candidate value of an output set value of each of LED units 2. If UV rays have ever been emitted so far by the LED units 2, each of which is formed of a plurality of LED chips 8, then a PLC 5 acquires, upon setting of a output set value by an operation unit 53, a correction value corresponding to a cumulative emission time up to a previous emission, from the correction table of the output set value. Thereafter, the PLC 5 sets the magnitude of the power supplied to each of the LED units 2 using the acquired correction value. If an output set value different from a previous output set value is set, the PLC 5 obtains the correction value starting from the cumulative emission time upon modification. As a result, the UV irradiation apparatus enables power consumption necessary for emission of UV rays to be reduced, and UV ray output to be kept constant regardless of the cumulative emission time, even if the output set value is modified.

Abstract: An LED module includes: a package having electrodes provided on the outer surface of opposing sidewalls, and a light-emitting element connected to the electrodes and mounted on the package; a base member having a copper metal; an insulating layer stacked on the surface of the base member and having an insulating material; and a conductive wiring pattern connected to the electrodes by soldering and formed on the surface of the insulating layer. The insulating layer has a through-hole formed by removing a part of the section where the package is positioned, and a heat dissipation unit formed by soldering between the back surface of the package and the base member, which face one another with the through-hole interposed therebetween.

Abstract: An LED module includes: a package having electrodes provided on the outer surface of opposing sidewalls, and a light-emitting element connected to the electrodes and mounted on the package; a base member having a copper metal; an insulating layer stacked on the surface of the base member and having an insulating material; and a conductive wiring pattern connected to the electrodes by soldering and formed on the surface of the insulating layer. The insulating layer has a through-hole formed by removing a part of the section where the package is positioned, and a heat dissipation unit formed by soldering between the back surface of the package and the base member, which face one another with the through-hole interposed therebetween.

Abstract: A detection sensor and method enable a communication of setting information without a dedicated communication device. In particular, the output of an output signal as well as the reception of the setting information data are conducted using a common external connecting terminal, by selectively enabling a second output circuit, which a pressure sensor essentially includes, and an input circuit commonly connected to the external connecting terminal that is connected to the second output circuit.