Abstract: An activation system of a work machine includes a vehicle body control unit outputting a control signal to drive a vehicle body of the work machine with power supplied by a power source, and an authentication unit performing authentication of an operator of the work machine. The activation system of a work machine first activates the authentication unit, and activates the vehicle body control unit when the authentication unit authenticates that the operator boarding the work machine is a specific operator.

Abstract: A work machine start-up system includes a control unit configured to control a work machine, a proximity detection unit configured to detect that a specific operator is in close proximity to the work machine, and a start-up unit configured to start at least part of the control unit when it is detected that the specific operator is in close proximity to the work machine.

Abstract: An authentication unit performs authentication of an operator. A storage unit stores setting data associated with a plurality of operators. A vehicle body control unit outputs a control signal to drive a vehicle body of the work machine with power supplied by a power source, based on the setting data associated with the authenticated operator. The authentication unit receives the authentication when the power source is stopped and does not receive the authentication when the power source is driven.

Abstract: First and second concentration measurement parts (415, 425) are provided in first and second supply liquid lines (412, 422) in which first and second supply liquids flow, respectively. A dissolved concentration of gas in the second supply liquid is lower than that in the first supply liquid. In the first and second supply liquid lines, respective one ends of first and second branch lines (51, 52) are connected to respective positions on the upstream side of the concentration measurement parts. The other ends of the first and second branch lines are connected to a mixing part (57), and by mixing the first and second supply liquids, a processing liquid is generated. Respective flow rate adjustment parts (58) of the first and second branch lines are controlled on the basis of respective measured values of the first and second concentration measurement parts so that the dissolved concentration of the gas in the processing liquid can become a set value.

Abstract: An ultrasonic flowmeter includes a measurement flow path and a pair of ultrasonic sensors arranged upstream and downstream on a first surface of the measurement flow path. In addition, the ultrasonic flowmeter includes a flow rate calculator that detects a flow rate of a fluid to be measured based on a propagation time until ultrasonic signals transmitted from one of the ultrasonic sensors propagate with one or more reflections on a second surface of the measurement flow path facing the first surface, and are received by the other one of the ultrasonic sensors. Furthermore, the measurement flow path has an inner wall surface provided with a draft of a mold for integral molding, and the ultrasonic sensors are fixed to the measurement flow path, incident angles of ultrasonic signals transmitted from the ultrasonic sensors on reflection surface of the second surface where the ultrasonic signals are reflected being equal.

Abstract: An ultrasonic flowmeter includes flow path that has a rectangular cross section and through which a fluid to be measured flows, and partition plate that divides flow path into measurement flow path and non-measurement flow paths. In addition, the ultrasonic flowmeter includes a pair of ultrasonic sensors that are arranged upstream and downstream of a surface forming flow path and transmitting and receiving ultrasonic signals, and a flow rate calculator that detects a flow rate of the fluid to be measured based on a propagation time. The ultrasonic flowmeter includes openings that connect measurement flow path, non-measurement flow paths, and a space where the ultrasonic sensors is located, and the ultrasonic sensors mainly propagate ultrasonic waves only to measurement flow path through openings.

Abstract: A gas safety device includes flow path, shutoff valve that shuts off flow path, flow rate measurement unit that measures a flow rate of gas, gas-side absolute pressure sensor that measures absolute pressure of the gas, atmosphere-side absolute pressure sensor that measures absolute pressure of atmospheric pressure, and pressure value transition detector that detects a transition state of the absolute pressure measured by gas-side absolute pressure sensor. Further provided are sensor drive controller that controls driving of atmosphere-side absolute pressure sensor in accordance with a value of pressure transition in pressure value transition detector, and gas pressure determination unit that calculates gas supply pressure from a difference between pressure values measured when the two sensors are driven.

Abstract: An ultrasonic flow meter includes measurement flow path where a cross section of a flow path through which a fluid to be measured flows is rectangular, one or more partition plates that divide measurement flow path into a plurality of layered flow paths, and a pair of ultrasonic sensors that are disposed upstream and downstream on the layered flow paths and are capable of transmitting and receiving an ultrasonic signal. In addition, the ultrasonic flow meter includes a flow rate measuring unit that detects a flow rate of the fluid to be measured based on a propagation time, the propagation time being a time period from when one of the ultrasonic sensors transmits the ultrasonic signal to cause the ultrasonic signal to propagate through the fluid to be measured until when an other one of the ultrasonic sensors receives the ultrasonic signal.

Abstract: A gas safety device includes: flow path through which a gas flows; ultrasonic sensor for measuring a flow rate of the gas flowing through flow path; flow rate calculator that calculates a flow rate measurement data pieces from a measurement value of the flow rate measured by ultrasonic sensor; and leakage detector that detects a minor leakage of the gas. The gas safety device further includes: pulsation recognizer that recognizes that pulsation is occurring when a fluctuation in the flow rate measuring data pieces calculated by flow rate calculator is greater than or equal to a predetermined value; and pulsating flow rate corrector that corrects, when pulsation recognizer determines that the pulsation is occurring, the flow rate measurement data piece by a predetermined value. Furthermore, when pulsation recognizer determines that the pulsation is occurring, leakage detector determines whether a leakage is present using the flow rate measurement data piece corrected by pulsating flow rate corrector.

Abstract: The present disclosure provides a technique for separating and identifying an abnormal cell in a cell sample derived from a subject. The present disclosure provides a method for analyzing cells using a cell analyzer by utilizing the functions, either alone or in combination, of the cell analyzer, said cell analyzer having a function of continuously concentrating cells, a function of successively arranging the cells in a specific region of a flow channel continuously, a function of simultaneously recognizing the shape of each cell, in a single cell unit on an image base, in the bright field and the shape of fluorescence, and a function of separating and purifying the cells having been recognized on the basis of the shape thereof obtained by correcting the aforesaid shape in accordance with the flow rate of the cells and the light emission data of the fluorescence.

Abstract: A gas safety device includes flow path, shutoff valve that shuts off flow path, flow rate measurement unit that measures a flow rate of gas, gas-side absolute pressure sensor that measures absolute pressure of the gas, atmosphere-side absolute pressure sensor that measures absolute pressure of atmospheric pressure, and pressure value transition detector that detects a transition state of the absolute pressure measured by gas-side absolute pressure sensor. Further provided are sensor drive controller that controls driving of atmosphere-side absolute pressure sensor in accordance with a value of pressure transition in pressure value transition detector, and gas pressure determination unit that calculates gas supply pressure from a difference between pressure values measured when the two sensors are driven.

Abstract: An ultrasonic flowmeter includes flow path that has a rectangular cross section and through which a fluid to be measured flows, and partition plate that divides flow path into measurement flow path and non-measurement flow paths. In addition, the ultrasonic flowmeter includes a pair of ultrasonic sensors that are arranged upstream and downstream of a surface forming flow path and transmitting and receiving ultrasonic signals, and a flow rate calculator that detects a flow rate of the fluid to be measured based on a propagation time. The ultrasonic flowmeter includes openings that connect measurement flow path, non-measurement flow paths, and a space where the ultrasonic sensors is located, and the ultrasonic sensors mainly propagate ultrasonic waves only to measurement flow path through openings.

Abstract: An ultrasonic flow meter includes measurement flow path through which a fluid to be measured flows, and first ultrasonic sensor and second ultrasonic sensor that are disposed upstream and downstream in a first surface on measurement flow path and are capable of transmitting and receiving an ultrasonic signal. In addition, the ultrasonic flow meter includes a flow rate calculator that detects a flow rate of the fluid to be measured based on a propagation time, the propagation time being a time period from when the first ultrasonic sensor transmits the ultrasonic signal to cause the ultrasonic signal to propagate through the fluid to be measured and be reflected on a second surface facing the first surface at least once until when the second ultrasonic sensor receives the ultrasonic signal.

Abstract: An ultrasonic flowmeter includes measurement flow path and a pair of ultrasonic sensors arranged upstream and downstream on a first surface of measurement flow path. In addition, the ultrasonic flowmeter includes a flow rate calculator that detects a flow rate of a fluid to be measured based on a propagation time until ultrasonic signals transmitted from one of the pair of ultrasonic sensors propagate with one or more reflections on a second surface of measurement flow path facing the first surface, and are received by another one of the pair of ultrasonic sensors. Furthermore, measurement flow path has an inner wall surface provided with a draft of a mold for integral molding, and the pair of ultrasonic sensors are fixed to measurement flow path, incident angles of ultrasonic signals transmitted from the pair of the ultrasonic sensors on reflection surface of the second surface where the ultrasonic signals are reflected being equal.

Abstract: An ultrasonic flow meter includes measurement flow path where a cross section of a flow path through which a fluid to be measured flows is rectangular, one or more partition plates that divide measurement flow path into a plurality of layered flow paths, and a pair of ultrasonic sensors that are disposed upstream and downstream on the layered flow paths and are capable of transmitting and receiving an ultrasonic signal. In addition, the ultrasonic flow meter includes a flow rate measuring unit that detects a flow rate of the fluid to be measured based on a propagation time, the propagation time being a time period from when one of the ultrasonic sensors transmits the ultrasonic signal to cause the ultrasonic signal to propagate through the fluid to be measured until when an other one of the ultrasonic sensors receives the ultrasonic signal.

Abstract: Provided is a gas safety device including: flow path for flowing gas; flow rate measurement unit for measuring a flow rate of the gas flowing through flow path; absolute pressure sensor disposed inside flow path to measure an absolute pressure of the gas; absolute pressure sensor disposed outside flow path to measure an absolute pressure of atmospheric pressure; and gas pressure determination unit that measures a change in gas supply pressure from the absolute pressure of the gas and the absolute pressure of the atmospheric pressure measured by absolute pressure sensor and absolute pressure sensor, respectively. The gas safety device further includes shutoff valve that shuts off flow path, and control circuit that controls flow rate measurement unit and that causes shutoff valve to shut off flow path when determining abnormality from the flow rate of the gas measured by flow rate measurement unit or the change in gas supply pressure measured by gas pressure determination unit.

Abstract: A gas safety device includes: flow path through which a gas flows; ultrasonic sensor for measuring a flow rate of the gas flowing through flow path; flow rate calculator that calculates a flow rate measurement data pieces from a measurement value of the flow rate measured by ultrasonic sensor; and leakage detector that detects a minor leakage of the gas. The gas safety device further includes: pulsation recognizer that recognizes that pulsation is occurring when a fluctuation in the flow rate measuring data pieces calculated by flow rate calculator is greater than or equal to a predetermined value; and pulsating flow rate corrector that corrects, when pulsation recognizer determines that the pulsation is occurring, the flow rate measurement data piece by a predetermined value. Furthermore, when pulsation recognizer determines that the pulsation is occurring, leakage detector determines whether a leakage is present using the flow rate measurement data piece corrected by pulsating flow rate corrector.

Abstract: Flow rate measurement is performed with a propagation time by using a pair of ultrasonic wave oscillators which is provided in flow path through which a fluid to be measured flows, and is disposed so as to transmit and receive an ultrasonic wave signal by causing the ultrasonic wave signal to be reflected on an inner wall of flow path at least once. In addition, adjustment of an amplification rate is periodically performed by amplifier, which amplifies the ultrasonic wave signal received by each of the ultrasonic wave oscillators to a predetermined amplitude, and a difference between a previous amplification rate and a current amplification rate is a predetermined value or more, and the instantaneous flow rate calculated by flow rate calculation unit is a predetermined flow rate or less, the reference voltage is adjusted by reference voltage setting unit. With the configuration, the propagation time can be stably measured and deterioration of the maximum amplitude is prevented.