Measurement apparatus and measurement method
AssigneeYokogawa Electric Corporation
InventorRai Itou
Life of this patent
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Abstract
A measurement apparatus 1 disposed with respect to a container 105 containing a liquid L. The measurement apparatus 1 includes output detectors fixed to the container 105 that output ultrasonic waves that propagate in the liquid L in the container 105 and detect the ultrasonic waves propagated in the liquid L. The measurement apparatus 1 also includes a controller 50 that measures a state of the liquid L in the container 105 based on the ultrasonic waves detected by the output detectors.
Claims11
A measurement apparatus disposed with respect to a container containing a liquid for stirring an object in the liquid, the measurement apparatus comprising:
- output detectors fixed to the container, the output detectors being configured to output ultrasonic waves that propagate in the liquid in the container and detect the ultrasonic waves propagated in the liquid;
- and
- a controller configured to measure a state of the liquid in the container based on the ultrasonic waves detected by the output detectors,
- wherein
- the state of the liquid includes a product state of the liquid in stirring,
- the controller is configured to measure the product state of the liquid based on reference data regarding the product state of the liquid in a first reference state and measurement data regarding the product state of the liquid in stirring, and
- the controller is configured to calculate a difference of the measurement data from the reference data and determine that the stirring of the object with respect to the liquid is complete when the difference is constant over a defined time.
A measurement method performed by a measurement apparatus disposed with respect to a container containing a liquid for stirring an object in the liquid, the measurement method comprising:
- outputting ultrasonic waves that propagate in the liquid in the container;
- detecting, at a fixed position relative to the container, the ultrasonic waves propagated in the liquid;
- and
- measuring a state of the liquid in the container based on the ultrasonic waves detected,
- wherein
- the state of the liquid includes a product state of the liquid in stirring,
- the measuring further comprises measuring the product state of the liquid based on reference data regarding the product state of the liquid in a first reference state and measurement data regarding the product state of the liquid in stirring, and
- calculating a difference of the measurement data from the reference data and determining that the stirring of the object with respect to the liquid is complete when the difference is constant over a defined time.
A measurement apparatus disposed with respect to a container containing a liquid, the measurement apparatus comprising:
- output detectors fixed to the container, the output detectors being configured to output ultrasonic waves that propagate in the liquid in the container and detect the ultrasonic waves propagated in the liquid;
- and
- a controller configured to measure a state of the liquid in the container based on the ultrasonic waves detected by the output detectors,
- wherein the state of the liquid includes presence or absence of bubbles or particles, and
- the controller is configured to measure the presence or absence of bubbles or particles based on at least one of a positive or negative beginning of a waveform and speed of sound of an ultrasonic wave detected by the output detectors, and
- the controller is configured to determine that bubbles are present when the positive or negative beginning of the waveform while the liquid is in use is inverted relative to the positive or negative beginning of a reference waveform while the liquid is in a second reference state.
Dependencies are inferred from the claim text.