Sensor and control unit for flow control and a method for controlled delivery of fluid

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.

A system comprising;

• 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.

A method for controlled delivery of a liquid medication, comprising:

• 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.