Azbil Corporation

Tokyo, Japan

Azbil Corporation

Tokyo, Japan
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Patent
Azbil Corporation | Date: 2016-11-18

The positioner having an air circuit including magnetism generating portions producing magnetism based on a current in accordance with a difference between a valve opening setpoint of a regulator valve and a measured value for the valve opening, to generate a pneumatic signal wherein the air pressure is adjusted based on the magnetism produced by the magnetism generating portions, where this pneumatic signal is supplied to an operating device of the regulator valve, where the magnetism generating portions are connected in parallel, and including a plurality of coils connected through magnetically additive coupling.


Patent
Azbil Corporation | Date: 2017-01-25

A positioner (1) includes: a displacement amount detector (11) that outputs a pair of detection signals; a multi-layered board (15) that propagates a pair of detection signals; a circuit board (20) on which an electronic circuit (12) generating a control signal for controlling a valve opening of the regulating valve, on the basis of the pair of detection signals is formed; and a housing (10) that accommodates at least the multi-layered board and the circuit board. The multi-layered board includes a first interconnection layer (L1) having a first interconnection pattern (30) formed therein, and a second interconnection layer (L2) that has a pair of signal interconnections formed therein and is disposed on the first interconnection layer through an interlayer insulation film. The first interconnection pattern is electrically connected to the housing and is formed so as to overlap the pair of signal interconnections formed in the second interconnection layer.


Patent
Azbil Corporation | Date: 2017-01-25

An input circuit includes a rectifier circuit that rectifies an excitation current obtained from a converter, and a constant voltage circuit that receives output of the rectifier circuit and performs control so that a power supply voltage is maintained constant. A power supply voltage source switching unit switches the source of a power supply voltage used in a calibrator to the constant voltage circuit when the converter is a converter of a four-wire electromagnetic flowmeter, and switches the source of the power supply voltage to a battery when the converter is a converter of a two-wire electromagnetic flowmeter. A remaining capacity indicator provides a remaining battery capacity indication in accordance with the voltage of the battery. When the converter is a converter of a four-wire electromagnetic flowmeter and it is determined that the battery is not in a battery holder, the remaining capacity indicator stops providing a remaining battery capacity.


Patent
Azbil Corporation | Date: 2017-01-18

A photoelectric sensor includes a current division control circuit that sequentially sets a reference voltage for each current divider circuit along one of the arrangement directions of photodiodes so that the reference voltage for the current divider circuit is equal to or larger than the voltage value of the reference voltage set for a current divider circuit in the preceding stage, and sets one common control voltage for all of the current divider circuits, the common control voltage falling within a range that includes all of the reference voltages.


Patent
Azbil Corporation | Date: 2017-02-22

A testing method for testing a liquid flowmeter, the method including introducing a test liquid and a sealant having a specific gravity smaller than that of the test liquid into a weighing tank until an outlet of a pipe is submerged in the test liquid; causing the test liquid to pass through the pipe; acquiring readings of a weighing scale configured to measure a weight of the weighing tank at multiple time points, and time information representing the time points; acquiring readings of the liquid flowmeter; calculating a standard flow rate of the test liquid based on the readings of the weighing scale at the multiple time points and the time information; and calculating an instrumental error between a measured flow rate based on the readings of the liquid flowmeter and the standard flow rate.


Patent
Azbil Corporation | Date: 2017-01-04

A photoelectric sensor includes the following components. A disturbance detection unit detects a disturbance by comparing a light reception result obtained by a light receiver with a first threshold and with a second threshold for a predetermined period in a state where no light is transmitted by a light transmitter. The second threshold takes a value of a sign opposite to that of the first threshold relative to a no-signal state. A waiting unit waits for the light reception result obtained by the light receiver to become within a range from the first threshold to the second threshold upon detection of a disturbance. A disturbance type determination unit causes detection of a disturbance to be performed again after the waiting. A light transmission instruction unit instructs the light transmitter to transmit light when no disturbance is detected for a predetermined period.


Patent
Azbil Corporation | Date: 2017-01-18

A positioner (1) includes: a displacement amount detector (11) that outputs a pair of detection signals; an interconnection board (15) that includes an interconnection layer (L1) which is disposed between two insulating layers (100, 101) and has a pair of signal interconnections (22, 23), having the pair of detection signals supplied thereto, formed therein; a circuit board (20) on which an electronic circuit (12) generating a control signal for controlling a valve opening of the regulating valve on the basis of the pair of detection signals is formed; and a housing (10). The interconnection board is bonded to the housing by a conductive adhesive member (30) in at least a portion of a surface of any one of the insulating layers, and the adhesive member has a measured value of hardness, which is obtained by a type D durometer after hardening, being in a range of equal to or greater than D20 and equal to or less than D90.


Patent
Azbil Corporation | Date: 2017-01-11

To provide a regulating valve whose stability of an operation is high, a regulating valve is disclosed that includes a valve box (1) in which a first flow channel (1a) and a second flow channel (1b) are formed; a cage (2) having a first throttle portion (20) provided in a boundary (1c) between the first flow channel and the second flow channel; a plug head having a second throttle portion (42) slidably inserted into an inside of the cage; and a guide ring (3) slidably holding a plug guide holding the plug head. In a closed state of the regulating valve, a distance between a through-hole of the first throttle portion and an end portion of the plug head on the other end side is shorter than a distance between a through-hole of the second throttle portion and an end portion of the cage on the opened one end side.


Patent
Azbil Corporation | Date: 2017-01-11

To provide a regulating valve of which stability of an operation is high, a regulating valve is disclosed that includes a valve box (1) in which a first flow channel (1a) and a second flow channel (1b) are formed; a cage (2) having a first throttle portion (20) provided in a boundary (1c) between the first flow channel and the second flow channel; a plug head having a second throttle portion (42) slidably inserted into an inside of the cage; and a guide ring (3) slidably holding a plug guide holding the plug head. In a closed state of the regulating valve, a distance between a through-hole of the first throttle portion and an end portion of the plug head on the other end side is equal to a distance between a through-hole of the second throttle portion and an end portion of the cage on the opened one end side.


Patent
Azbil Corporation | Date: 2017-04-12

A light receiver has a shield wall disposed facing a part of a near-side light-receiving face of a light receiving element from an end opposite from a far-side light-receiving face. The shield wall blocks a portion of reflection light from a detection object located at a distance at which the detection object reflects reflection light that causes an amount of light received by the light receiving element to be larger than or equal to a predetermined value.

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