Sensor and control unit for flow control and a method for controlled delivery of fluid
First Claim
1. A sensor (102) for measuring a velocity of a fluid (208) flowing through a channel (206), the sensor comprising:
- a chip (104) and a sensor receiver (310),wherein the chip includesa heating element (106) for heating the fluid, anda transducer arrangement (108) spatially positioned on the chip across the heating element for generating a measurement signal indicative for the velocity of the fluid flowing through the channel based on the ratio of a first spatial temperature difference and a second spatial temperature difference, andwherein the sensor receiver is arranged for receiving an electromagnetic radiation for powering the heating element.
1 Assignment
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Accused Products
Abstract
The invention relates to a sensor (102) and a control unit (702) for cooperation with the sensor. The sensor (102) serves for measuring a velocity of a fluid (308) flowing through a channel (306). The sensor (102) employs a thermal measuring principle, which measuring principle is robust regarding disturbances on the amount of power dissipated by the heating element (106). A sensor receiver (110) is arranged for receiving an electromagnetic radiation generated by a control transmitter (722) comprised in a control (702) unit for cooperation with the sensor (102). The electromagnetic radiation is employed for powering the heating element (106) which is arranged for heating the fluid. On the basis of a measurement signal generated by a transducer arrangement comprised in the sensor (102), a control actuator (724) controls the velocity of the fluid. For this purpose a sensor transmitter (116) is arranged for transmitting the measurement signal to a control receiver (734).
16 Citations
20 Claims
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1. A sensor (102) for measuring a velocity of a fluid (208) flowing through a channel (206), the sensor comprising:
a chip (104) and a sensor receiver (310), wherein the chip includes a heating element (106) for heating the fluid, and a transducer arrangement (108) spatially positioned on the chip across the heating element for generating a measurement signal indicative for the velocity of the fluid flowing through the channel based on the ratio of a first spatial temperature difference and a second spatial temperature difference, and wherein the sensor receiver is arranged for receiving an electromagnetic radiation for powering the heating element. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A control unit (602) for cooperation with a sensor (102) for measuring a velocity of a fluid (208) flowing through a channel (206), wherein the sensor includes a chip (104) and a sensor receiver (310),
wherein the chip includes a heating element (106) for heating the fluid, and a transducer arrangement (108) spatially positioned on the chip across the heating element for generating a measurement signal indicative for the velocity of the fluid flowing through the channel based on the ratio of a first spatial temperature difference and a second spatial temperature difference, and wherein the sensor receiver is arranged for receiving an electromagnetic radiation for powering the heating element, the control unit comprising: a control transmitter (626) for transmitting the electromagnetic radiation to the sensor receiver. - View Dependent Claims (10, 11, 12, 13)
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14. A system comprising;
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a sensor (102) for measuring a velocity of a fluid (208) flowing through a channel (206), wherein the sensor includes a chip (104) and a sensor receiver (310), wherein the chip includes a heating element (106) for heating the fluid, and a transducer arrangement (108) spatially positioned on the chip across the heating element for generating a measurement signal indicative for the velocity of the fluid flowing through the channel based on the ratio of a first spatial temperature difference and a second spatial temperature difference, and wherein the sensor receiver is arranged for receiving an electromagnetic radiation for powering the heating element; and the control unit includes a control transmitter (626) for transmitting the electromagnetic radiation to the sensor receiver. - View Dependent Claims (15, 16, 17)
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18. A method for controlled delivery of a liquid medication, comprising:
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a step (802) of establishing a predefined fluid flow velocity; a step (804) of detachably connecting a control unit to a channel, the control unit cooperating with a sensor, for measuring a velocity of a fluid (208) flowing through the channel (206), wherein the sensor includes a chip (104) and a sensor receiver (310), wherein the chip (104) includes a heating element (106) for heating the fluid, and a transducer arrangement (108) spatially positioned on the chip across the heating element for generating a measurement signal indicative for the velocity of the fluid flowing through the channel based on a ratio of spatial temperature differences, the sensor receiver being arranged for receiving an electromagnetic radiation for powering the heating element; and a step (806) of controlled delivery of the liquid medication through the channel by application of the sensor and an actuator controlling the flow velocity of the fluid flowing through the channel. - View Dependent Claims (19, 20)
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Specification