In some examples, an apparatus can include a light transmitter, a light sensor aligned along a light transmittance axis of the light transmitter, an impeller positioned between the light transmitter and the light sensor. The impeller can in some examples include a blade to pass through the light transmittance axis during rotation of the impeller. The blade can in some examples be translucent to permit calibration of the light sensor based on a comparison of a first light sensor reading when the blade intersects the light transmittance axis and a second light sensor reading when the blade does not intersect the light transmittance axis.

There is described a fluid flow measuring and control device for installation within plumbing. The device comprises a main flow channeling system having an inlet and an outlet for connection to the plumbing, and a bypass channeling system in parallel from the main flow channeling system. A flowmeter is provided in the bypass channeling system for measuring the fluid flow in the bypass channeling system and thereby estimating the fluid flow at the inlet or at the outlet of the main flow channeling system. The flowmeter may comprise a wheel and a pair of movement sensors. A valve such as a solenoid valve can be provided as an on/off control for the plumbing. Using a microcontroller, the device can identify which appliance is used and determine consumption, or detect abnormal use or leaks and close the valve and/or notify a user mobile device.

Systems and methods related to a flow meter and/or flow meter operation can include one or more sensors and be capable of detecting parameters of the fluid flowing the flowmeter. One or more sensors can include capacitive sensors having a plurality of electrodes and configured to detect capacitive properties of a fluid flowing through the flow meter. Detected changes in detected properties of the fluid can be evidence of important changes in the fluid, such as an out of product event or a contamination of the fluid.

There is described a fluid flow measuring and control device for installation within plumbing. The device comprises a main flow channelling system having an inlet and an outlet for connection to the plumbing, and a bypass channelling system in parallel from the main flow channelling system. A flowmeter is provided in the bypass channelling system for measuring the fluid flow in the bypass channelling system and thereby estimating the fluid flow at the inlet or at the outlet of the main flow channelling system. The flowmeter may comprise a wheel and a pair of movement sensors. A valve such as a solenoid valve can be provided as an on/off control for the plumbing. Using a microcontroller, the device can identify which appliance is used and determine consumption, or detect abnormal use or leaks and close the valve and/or notify a user mobile device.

A sensor apparatus and a method of operating the sensor apparatus can include one or more sensors and a circuit board, wherein the one or more sensors can include a rotatable component (e.g., pulse disk, crank, pin, shaft, etc), and an angular circuit board assembly that maintains the circuit board in an angular position with respect to the rotatable component in an arrangement that allows the rotatable component to dive through the circuit board. The sensor can be, for example, a magnetic sensor, a light emitting diode or a photo diode. The sensor apparatus can include a flow channel and the rotatable component can oscillate to provide a measurement of a flow of fluid through the flow channel. The sensor apparatus can be used for the mechanical/electrical detection of pulses of a rotary motion.

There is described a fluid flow measuring and control device for installation within plumbing. The device comprises a main flow channelling system having an inlet and an outlet for connection to the plumbing, and a bypass channelling system in parallel from the main flow channelling system. A flowmeter is provided in the bypass channelling system for measuring the fluid flow in the bypass channelling system and thereby estimating the fluid flow at the inlet or at the outlet of the main flow channelling system. The flowmeter may comprise a wheel and a pair of movement sensors. A valve such as a solenoid valve can be provided as an on/off control for the plumbing. Using a microcontroller, the device can identify which appliance is used and determine consumption, or detect abnormal use or leaks and close the valve and/or notify a user mobile device.

A system for measuring the difference between a property of a first target and a property of a second target, the system comprising a first member and a second member, wherein the first member comprises a first pattern, and the speed of rotation of the first member is configured to be based on the property of the first target; and the second member comprises a second pattern wherein, the speed of rotation of the second member is configured to be based on the property of the second target, further wherein the first and second pattern are angularly-varying and are configured to generate an interference pattern by their interaction when the first and second members have a relative difference in their rotational speeds, the interference pattern being indicative of the magnitude of this difference.

The present invention relates to a flow rate measurement device and, more specifically, to a flow rate measurement device and a flow rate measurement method, wherein a flow rate is measured by sensing a rotation caused by a flow of a fluid. The present invention provides a flow rate measurement device characterized by comprising: a housing (100) having a fluid inlet port (111) and a discharge port (112) formed to face each other; a rotating portion (200) comprising a rotating shaft (210) arranged perpendicularly to a virtual line (C) connecting the inlet port (111) and the discharge port (112) inside the housing (100), and a blade (220) rotated by a flow of a fluid around the rotating shaft (210); a sensor portion arranged to be spaced apart from the rotating shaft (210) in the radial direction of the rotating shaft (210) so as to sense the number of rotations of the rotating portion (200); and a control portion (330) for measuring the flow rate of the fluid on the basis of the number of rotations of the rotating portion (200) sensed by the sensor portion.

There is described a fluid flow measuring and control device for installation within plumbing. The device comprises a main flow channelling system having an inlet and an outlet for connection to the plumbing, and a bypass channelling system in parallel from the main flow channelling system. A flowmeter is provided in the bypass channelling system for measuring the fluid flow in the bypass channelling system and thereby estimating the fluid flow at the inlet or at the outlet of the main flow channelling system. The flowmeter may comprise a wheel and a pair of movement sensors. A valve such as a solenoid valve can be provided as an on/off control for the plumbing. Using a microcontroller, the device can identify which appliance is used and determine consumption, or detect abnormal use or leaks and close the valve and/or notify a user mobile device.

The present invention relates to a flow rate measurement device and, more specifically, to a flow rate measurement device and a flow rate measurement method, wherein a flow rate is measured by sensing a rotation caused by a flow of a fluid. The present invention provides a flow rate measurement device characterized by comprising: a housing (100) having a fluid inlet port (111) and a discharge port (112) formed to face each other; a rotating portion (200) comprising a rotating shaft (210) arranged perpendicularly to a virtual line (C) connecting the inlet port (111) and the discharge port (112) inside the housing (100), and a blade (220) rotated by a flow of a fluid around the rotating shaft (210); a sensor portion arranged to be spaced apart from the rotating shaft (210) in the radial direction of the rotating shaft (210) so as to sense the number of rotations of the rotating portion (200); and a control portion (330) for measuring the flow rate of the fluid on the basis of the number of rotations of the rotating portion (200) sensed by the sensor portion.