Abstract: Provided is a controller of a liquid feeding pump configured to: calculate a first amount of compression of a solvent by a first plunger in one driving cycle based on a compression rate parameter and control the first plunger to compress the solvent by the first compression amount in the driving cycle; when a value relating to a pressure value measured by the pressure sensor is below a threshold in the driving cycle, change the compression rate parameter according to the pressure value, and calculate a second amount of compression of the solvent by the first plunger in a subsequent driving cycle, based on the changed compression rate parameter; and when the value relating to the pressure value exceeds the threshold in the driving cycle, calculate a third amount of compression of the solvent by the first plunger in the subsequent driving cycle, based on the original compression rate parameter.

Abstract: A liquid delivery pump delivers a liquid with high flow rate accuracy in consideration of solvent expansion, pressure dependent leakage of the solvent, and flow rate dependent leakage of the solvent. A liquid delivery pump includes first and second plunger pumps connected together, having respective first and second plungers. A pressure sensor measures a liquid delivery pressure (P2) from the second plunger pump, and a controller controls the driving of the first and second plungers. The controller obtains a moving speed (v1) of the first plunger and a moving speed (v2) of the second plunger using a parameter (C1, C0) depending on the liquid delivery pressures (P1, P2), the liquid delivery pressure, and a target flow rate of the liquid. The parameter (C1, C0) is a parameter of an expression representing a relationship between the liquid delivery pressure (P2) and a flow rate (Q0) of the liquid.

Abstract: Provided is an autosampler of a liquid chromatograph that can manage a sample container even in a case where the throughput of a pretreatment unit exceeds the throughput of the autosampler. An autosampler of a liquid chromatograph includes a plurality of sample aspiration nozzles that aspirates a sample from sample containers installed at respective sample aspiration points; a sample transfer means that transfers the sample containers to the respective sample aspiration points; and a retraction point where one of the sample containers is put into the autosampler and one of the sample containers collected from the sample aspiration points can be held.

Abstract: An imaging lens unit includes a resin lens barrel and a plurality of lenses incorporated in the lens barrel. The lens barrel has a lens barrel body and a box-shaped part. A plurality of lens receiving parts are arranged at predetermined intervals in a circumferential direction of the lens barrel body and protrude from an inner peripheral surface of the lens barrel body. The fourth lens is fixed to the lens barrel in a state of being engaged with the plurality of lens receiving parts.

Abstract: Provided is a controller of a liquid feeding pump configured to: calculate a first amount of compression of a solvent by a first plunger in one driving cycle based on a compression rate parameter and control the first plunger to compress the solvent by the first compression amount in the driving cycle; when a value relating to a pressure value measured by the pressure sensor is below a threshold in the driving cycle, change the compression rate parameter according to the pressure value, and calculate a second amount of compression of the solvent by the first plunger in a subsequent driving cycle, based on the changed compression rate parameter; and when the value relating to the pressure value exceeds the threshold in the driving cycle, calculate a third amount of compression of the solvent by the first plunger in the subsequent driving cycle, based on the original compression rate parameter.

Abstract: An imaging lens includes a front group having negative power, an aperture stop, and a rear group having positive power, in order from an object side. In the front group, a first lens surface has a convex shape toward the object side. In the rear group, a second lens surface has a convex shape toward the object side, a third lens surface has a convex shape toward the image side, and the third lens surface has an infrared ray cut coat. A curvature radius of the second lens surface is represented by Rr, a curvature radius of the third lens surface is represented by Re, a distance from the second lens surface to the third lens surface on an optical axis is represented by Da, and the following condition is satisfied: 1.6<(Rr+|Re|)/Da<2.3.

Abstract: The invention provides an automatic analyzer capable of closing a lid of a container containing a reagent or a specimen without wearing an upper surface of the lid even when the lid fails to close. The automatic analyzer includes a container accommodation portion that has a lid openable and closable by a rotation fulcrum and accommodates a container containing a reagent or a specimen, and a lid closing guide portion that closes the lid by moving relative to the container accommodation portion, wherein the lid closing guide portion is in contact with an edge of the lid to close the lid.

Abstract: A liquid delivery pump delivers a liquid with high flow rate accuracy in consideration of solvent expansion, pressure dependent leakage of the solvent, and flow rate dependent leakage of the solvent. A liquid delivery pump includes first and second plunger pumps connected together, having respective first and second plungers. A pressure sensor measures a liquid delivery pressure (P2) from the second plunger pump, and a controller controls the driving of the first and second plungers. The controller obtains a moving speed (v1) of the first plunger and a moving speed (v2) of the second plunger using a parameter (C1, C0) depending on the liquid delivery pressures (P1, P2), the liquid delivery pressure, and a target flow rate of the liquid. The parameter (C1, C0) is a parameter of an expression representing a relationship between the liquid delivery pressure (P2) and a flow rate (Q0) of the liquid.

Abstract: In an automatic analyzer, detection sensitivity in flow rate measurement in a cleaning system having a low pressure and a low flow rate is improved. The present disclosure proposes a control method for an automatic analyzer including a liquid feed pump that feeds, through a flow path, a cleaning liquid to a cleaning mechanism of a dispensing nozzle, and a control unit that controls an operation of the liquid feed pump. The control method includes: operating, by the control unit, the liquid feed pump to feed the cleaning liquid to a low-pressure flow path having a low pressure and a low flow rate, the low-pressure flow path constituting at least a part of the flow path; and operating, by the control unit, a flow rate estimation mechanism provided in the low-pressure flow path to obtain a flow rate estimation value in the low-pressure flow path.

Abstract: The present invention relates to an additive manufacturing powder material including Fe alloy particles each having an oxide film on a surface thereof, in which the Fe alloy particles satisfy d?15 and I/d?0.025, where d [nm] represents a thickness of the oxide film, and a peak intensity ratio I represents an intensity ratio IB/IA of a peak B in a region B of a Raman shift of 1,309 to 1,329 cm?1 to a peak A in a region A of a Raman shift of 657.5 to 677.5 cm?1 in a Raman spectrum.

Abstract: Provided is an inspection method for a liquid feeding device capable of preventing an increase in the number of components, a decrease in throughput, and an increase in a leakage source. The method includes: suctioning a fluid from a fluid tank into a first cylinder by driving a first plunger in a suction direction; driving the first plunger in a discharge direction after suction; stopping the first plunger for a predetermined first time; driving the first plunger in the discharge direction; and estimating a leakage amount in a flow path on an upstream side of a second check valve based on a detection value of a pressure detected by a pressure sensor from start of the driving of the first plunger in the discharge direction to end of the driving of the first plunger in the discharge direction.

Abstract: Provided is an autosampler of a liquid chromatograph that can manage a sample container even in a case where the throughput of a pretreatment unit exceeds the throughput of the autosampler. An autosampler of a liquid chromatograph includes a plurality of sample aspiration nozzles that aspirates a sample from sample containers installed at respective sample aspiration points; a sample transfer means that transfers the sample containers to the respective sample aspiration points; and a retraction point where one of the sample containers is put into the autosampler and one of the sample containers collected from the sample aspiration points can be held.

Abstract: An imaging lens may be a retrofocus type imaging optical system including, in order from an object side, a first lens group, an aperture and a second lens group. The first lens group may include, from the object side, a meniscus as a first lens in which a convex surface is formed on the object side, and a meniscus lens as a second lens in which a convex surface is formed on the object side. The second lens group may include a convex lens as a third lens, a biconvex lens as a fourth lens, a biconvex lens as a fifth lens and a sixth lens, and the fifth lens and the sixth lens may be joined to each other. The imaging lens may be constructed with 6 elements and 5 groups including the first lens group and the second lens group.

Abstract: The durability and detection accuracy of a sensor unit may possibly decrease due to radiation heat generated from work pieces while they are welded together. A sensor device 1 includes a sensor unit 2, a housing case 3, and a shielding member 5. The sensor unit 2 is a device for measuring the shapes of the work pieces W or the distance to the work pieces W. The housing case 3 houses the sensor unit 2 and has formed therein a pass-through portion 36a for laser beam projection and a pass-through portion 36b for detection that pass a laser beam L1 from a laser beam projection unit 21 and a laser beam L2 directed to a detection unit 22, respectively. The shielding member 5 is attached to the housing case 3, and shields radiation heat directed toward the lower surface of the housing case 3 among radiation heat generated while the work pieces W are welded together. The shielding member 5 is made of a material with lower thermal conductivity than that of the housing case 3.

Abstract: The present invention relates to an additive manufacturing powder material including Fe alloy particles each having an oxide film on a surface thereof, in which the Fe alloy particles satisfy d?15 and I/d?0.025, where d [nm] represents a thickness of the oxide film, and a peak intensity ratio I represents an intensity ratio IB/IA of a peak B in a region B of a Raman shift of 1,309 to 1,329 cm?1 to a peak A in a region A of a Raman shift of 657.5 to 677.5 cm?1 in a Raman spectrum.

Abstract: A gas, which flows between a welding device and work pieces while the work pieces are welded together, has large influence on the welding. A sensor device includes a sensor unit and a container that includes a housing case (i.e., housing portion) and a shielding member (i.e., shielding portion). The shielding member is attached to the housing case, and shields radiation heat directed toward the lower surface of the housing case among radiation heat generated while the work pieces W are welded together. The shielding member is inclined with respect to a flow direction of a gas passing through an outlet port for detection of a second gas flow channel so that the gas discharged from the outlet port for detection is blown to the shielding member and thus flows to a side opposite to the side where the work pieces W are to be welded together.

Abstract: A sensor device includes a sensor to detect a light beam to measure states of work pieces or a distance to the work pieces, a case body housing the sensor, and a protective cover including a protective plate that transmits the detection light beam. The protective cover includes a gas flow channel that passes a gas to be blown to the protective plate, the gas flow channel having formed therein an outlet port that passes the detection light beam and discharges the gas having flowed through the gas flow channel. The gas flow channel includes an accumulator between the protective cover and the case body adapted to have accumulated therein the gas flowing through the gas flow channel, and the accumulator includes vent holes through which the gas is allowed to flow out toward the outlet port.

Abstract: The present invention relates to a powder material including metal particles, in which in a mass basis cumulative particle size distribution, the metal particles have a 10% particle diameter d10 of less than 16 ?m and a 90% particle diameter d90 of more than 35 ?m and when a specific energy obtained as a value yielded by dividing a flow energy measured as an energy acting on a blade spiraling upward in the powder material by a mass of the powder material is normalized with a bulk density of the powder material, a resulting value is less than 0.47 mJ·ml/g2 and relates to a producing method for the same.

Abstract: An imaging lens unit includes a resin lens barrel and a plurality of lenses incorporated in the lens barrel. The lens barrel has a lens barrel body and a box-shaped part. A plurality of lens receiving parts are arranged at predetermined intervals in a circumferential direction of the lens barrel body and protrude from an inner peripheral surface of the lens barrel body. The fourth lens is fixed to the lens barrel in a state of being engaged with the plurality of lens receiving parts.

Abstract: An imaging lens includes a front group having negative power, an aperture stop, and a rear group having positive power, in order from an object side. In the front group, a first lens surface has a convex shape toward the object side. In the rear group, a second lens surface has a convex shape toward the object side, a third lens surface has a convex shape toward the image side, and the third lens surface has an infrared ray cut coat. A curvature radius of the second lens surface is represented by Rr, a curvature radius of the third lens surface is represented by Re, a distance from the second lens surface to the third lens surface on an optical axis is represented by Da, and the following condition is satisfied: 1.6<(Rr+|Re |)/Da<2.3.