Enhanced cooker hood with sensors for remote temperature measurement and presence detection

Patent metadata

Field	Value
Publication number	US-12306046-B2
Application number	US-202117513675-A
Country	US
Kind code	B2
Filing date	Oct 28, 2021
Priority date	Oct 28, 2021
Publication date	May 20, 2025
Grant date	May 20, 2025

Abstract

A device including a sensor is disclosed. In one embodiment, the sensor includes a thermal infrared sensor or a sensor based on CMOS-SOI-MEMS technology (also referred to as “TMOS”). The sensor is capable of performing at least two functions at the same time. The first is remote temperature measurement and the second is presence detection. The sensor passively collects infrared information and a microprocessor coupled to the sensor determines the temperature as well as presence.

First claim

The invention claimed is:

1. A device comprising:
an infrared sensor having a field of view;
a processor coupled to the infrared sensor, the processor including:
a temperature determination circuit configured to determine a temperature of one or more objects on or adjacent to a heat generating structure within the field of view of the infrared sensor;
a presence determination circuit configured to detect presence within the field of view of the infrared sensor;
a compensation circuit configured to compensate the temperature based on a temperature of the processor and characteristics of the one or more objects on or adjacent to the heat generating structure in the field of view of the infrared sensor,

wherein the characteristics of the one or more objects include a type of a material and emissivity of the material, and
wherein the presence determination circuit is disabled in response to determining that the temperature compensated by the compensation circuit is below a safety temperature threshold.

2. The device according to claim 1 , wherein the sensor includes a CMOS-SOI transistor.

3. The device according to claim 1 , wherein compensating the temperature by the compensation circuit includes adjusting the temperature of the one or more objects based on an increased temperature of the processor caused by a heat flow from the one or more objects on and adjacent to the heat generating structure.

4. The device according to claim 1 , wherein the presence determination circuit is enabled in response to determining that the temperature compensated by the compensation circuit is above the safety temperature threshold.

5. The device according to claim 1 , wherein the sensor includes a first surface that is facing the heat generating structure, further comprising a lens on the first surface of the sensor to be arranged between the sensor and the heat generating structure,
wherein the lens coupled to the sensor adjusts the field of view of the sensor.

6. The device according to claim 5 , wherein the lens includes a semi-spherical lens.

7. A system, comprising,
a heat generating source;
a support structure above and aligned with the heat generating source, the support structure having a first surface facing the heat generating source;
a device on the first surface of the support structure, the device including:
a sensor having a field of view, the sensor configured to collect infrared data of one or more objects within the field of view, the sensor facing the heat generating source, the infrared data indicative of an intensity of infrared light;
a temperature determination circuit coupled to the sensor, the temperature determination circuit configured to determine temperature of the one or more objects within the field of view;
a compensation circuit configured to compensate temperature based on a temperature of a processor and emissivity of the one or more objects within the field of view; and
a presence determination circuit configured to detect presence within the field of view of the sensor,

wherein the presence determination circuit is disabled in response to determining that the temperature compensated by the compensation circuit is below a safety temperature threshold.

8. The system according to claim 7 , wherein the compensation circuit compensates a temperature of an object within the field of view of the sensor based on the following formula:

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Assignees

• St Microelectronics Srl

Inventors

• Bruno Giuseppe
• La Malfa Antonella
• Alessi Enrico Rosario
• Passaniti Fabio

Classifications

• G01J5/03

  Arrangements for indicating or recording specially adapted for radiation pyrometers · CPC title

• G01J5/041

  Mountings in enclosures or in a particular environment · CPC title

• F24C15/2021

  Arrangement or mounting of control or safety systems · CPC title

• F24C7/083

  on tops, hot plates · CPC title

• G01J5/48

  Thermography; Techniques using wholly visual means · CPC title