摘要:
The ultrasonic flaw-rate measurement unit of the invention includes a flow measurement path inside which fluid to be measured flows through and to which a case accommodating a pair of ultrasonic transducers is installed, a pair of ultrasonic transducers disposed in the flow measurement path, a measuring circuit substrate incorporating a propagation time measuring part measuring a propagation time between the ultrasonic transducer transmitter and receiver and a flow-rate calculating part calculating a flow rate of the fluid to be measured based on the propagation time measured by the propagation time measuring part, and a damping material filling an interior space of the case and covering the pair of ultrasonic transducers.
摘要:
Provided is ultrasonic flow measuring unit including: measurement path through which fluid to be measured flows; a pair of ultrasonic transducers disposed respectively upstream and downstream of measurement path and operable to transmit and receive an ultrasonic signal; and ultrasonic transducer attachment unit disposed in measurement path. Each of ultrasonic transducers includes piezoelectric element, terminal for applying a voltage to piezoelectric element, and acoustic matching layer adhered to a transmitting surface of terminal. Ultrasonic transducer is fixed to ultrasonic transducer attachment unit using an elastic coating material.
摘要:
An ultrasonic flow rate measuring device includes a flow path, a partition plate that is inserted from an aperture to partition the flow path into plural sections, an ultrasound transmission body, plural ultrasonic transducers that are provided in positions facing a bottom plate such that an ultrasonic wave transmitted from one of the ultrasonic transducers through the ultrasound transmission body is reflected by the bottom plate and received by the other ultrasonic transducer, a measurement circuit that measures an ultrasonic propagation time between the plurality of the ultrasonic transducers; and a calculation circuit that obtains a flow rate of the target fluid based on a signal from the measurement circuit.
摘要:
An ultrasonic flow rate measuring device includes a flow path, a partition plate that is inserted from an aperture to partition the flow path into plural sections, an ultrasound transmission body, plural ultrasonic transducers that are provided in positions facing a bottom plate such that an ultrasonic wave transmitted from one of the ultrasonic transducers through the ultrasound transmission body is reflected by the bottom plate and received by the other ultrasonic transducer, a measurement circuit that measures an ultrasonic propagation time between the plurality of the ultrasonic transducers; and a calculation circuit that obtains a flow rate of the target fluid based on a signal from the measurement circuit.
摘要:
Ultrasonic flow rate measurement device includes measurement flow path in which a fluid to be measured flows, and a pair of ultrasonic vibrators that are disposed in directions such that a propagation path of an ultrasonic wave forms a V-shape relative to measurement flow path. Moreover, the device includes measurement circuit which measures a flow rate of the fluid to be measured by measuring a propagation time of the ultrasonic wave between the pair of ultrasonic vibrators, and inlet-side rectification part which is disposed, in the inlet side of measurement flow path, to stabilize the flow of the fluid to be measured. Furthermore, the device includes outlet-side coupling part which is disposed in the outlet side of measurement flow path, and signal lead-out part which outputs a flow rate value measured with measurement circuit.
摘要:
Ultrasonic flow rate measurement device includes measurement flow path in which a fluid to be measured flows, and a pair of ultrasonic vibrators that are disposed in directions such that a propagation path of an ultrasonic wave forms a V-shape relative to measurement flow path. Moreover, the device includes measurement circuit which measures a flow rate of the fluid to be measured by measuring a propagation time of the ultrasonic wave between the pair of ultrasonic vibrators, and inlet-side rectification part which is disposed, in the inlet side of measurement flow path, to stabilize the flow of the fluid to be measured. Furthermore, the device includes outlet-side coupling part which is disposed in the outlet side of measurement flow path, and signal lead-out part which outputs a flow rate value measured with measurement circuit.
摘要:
The present invention implements an ultrasonic flow meter device which does not require a complicated configuration such as a hermetic seal, in an inexpensive and easy manner. A typical ultrasonic flow meter device includes a fluid passage body, a measurement fluid passage placed within the fluid passage body, a pair of ultrasonic sensors, a wall defining the measurement fluid passage and attached with the ultrasonic sensors, a propagation time measuring means for measuring a propagation time of an ultrasonic sound wave propagating between the ultrasonic sensors, and a fluid flow calculating means for calculating a fluid flow based on a propagation time, and a seal member is provided between the fluid passage body and the wall to prevent a fluid from leaking.
摘要:
Provided are a channel member and an ultrasonic fluid-measuring apparatus that can prevent the disturbance from occurring in the ultrasonic waves due to disturbance of a fluid. A channel member (15) includes a first side wall part (21) and a second side wall part (22) that are parallel to each other, a first ultrasonic wave input/output section (32) and a second ultrasonic wave input/output section (33) provided in the first side wall part, a reflecting surface (35) provided on an inner surface of the second side wall part, and an ultrasonic wave transmission membrane (38) that covers the first ultrasonic wave input/output section and the second ultrasonic wave input/output section and transmits ultrasonic waves (36, 37) therethrough. The first ultrasonic wave input/output section and the second ultrasonic wave input/output section are continuous with each other, and the ultrasonic wave transmission membrane covers both the first ultrasonic wave input/output section and the second ultrasonic wave input/output section together.
摘要:
An ultrasonic fluid measuring device capable of improving a measuring accuracy is provided. In an ultrasonic fluid measuring device 10, first to third ultrasonic measuring portions 16 to 18 are equipped with first ultrasonic transmitter-receivers 16A to 18A and second ultrasonic transmitter-receivers 16B to 18B provided to a measuring pass 14 respectively, and also first to third ultrasonic propagation paths 36 to 38 connecting the first ultrasonic transmitter-receiver 16A to 18A and the second ultrasonic transmitter-receivers 16B to 18B are provided to intersect with a passing direction of a fluid 24 flowing through the measuring pass 14 at different angles respectively. The ultrasonic fluid measuring device 10 employs any one of measured values of the first to third ultrasonic measuring portions 16 to 18 in response to a flow rate Q.
摘要:
An ultrasonic flow-meter of the present invention includes a partition plate which partitions a passage of a target fluid into a measurement passage and a non-measurement passage, a pair of ultrasonic transducers which is disposed in the measurement passage, a measuring unit which measures a propagation time of an ultrasonic wave between the pair of ultrasonic transducers, and a calculating unit which calculates a flow rate of the target fluid. Further, the calculating unit has a computing unit which computes at least one of a flow velocity and a flow rate of the target fluid in the measurement passage based on the propagation time and an estimating unit which estimates the flow rate of the target fluid in the passage based on the flow velocity or the flow rate in the measurement passage. As a result, an ultrasonic flow-meter which highly accurately measures a target fluid by using a simple configuration can be realized.