Thermal detection systems, methods, and devices

Patent metadata

Field	Value
Publication number	US-10794769-B2
Application number	US-201313803875-A
Country	US
Kind code	B2
Filing date	Mar 14, 2013
Priority date	Aug 2, 2012
Publication date	Oct 6, 2020
Grant date	Oct 6, 2020

Abstract

Systems, methods, and devices for thermal detection. A thermal detection device includes a visual sensor, a thermal sensor (e.g., a thermopile array), a controller, a user interface, a display, and a removable and rechargeable battery pack. The thermal detection device also includes a plurality of additional software and hardware modules configured to perform or execute various functions and operations of the thermal detection device. An output from the visual sensor and an output from the thermal sensor are combined by the controller or the plurality of additional modules to generate a combined image for display on the display.

First claim

What is claimed is:

1. A thermal detection device comprising:
an outer housing;
a visual camera configured to generate a first signal related to a visual image of a scene;
a first thermopile array including a first plurality of pixels;
a second thermopile array including a second plurality of pixels;
an array of temperature sensors positioned around the first thermopile array;
a first control unit including a processor and a first memory, the first control unit connected to the first thermopile array and configured to generate a second signal related to a thermal image of the scene, the second signal associated with a temperature sensed by at least one of the first plurality of pixels in the first thermopile array, the first control unit positioned within a sub-housing, the sub-housing including at least one metallic side surface;
a second control unit including a processor and a second memory, the second control unit electrically connected to the visual camera and the first control unit, the second control unit configured to
receive the second signal from the first control unit,
receive one or more output signals from the array of temperature sensors related to a temperature of the first thermopile array,
generate a thermal map of the first plurality of pixels in the first thermopile array based on the one or more output signals from the array of temperature sensors, the thermal map related to how each pixel of the first thermopile array is affected by variations in temperature,
compensate the second signal based on the thermal map, and
adjust a temperature, using the second thermopile array, of the at least one of the first plurality of pixels in the first thermopile array, the temperature adjusted based on the thermal map; and

a display configured to display the visual image based on the first signal and the thermal image based on the compensated second signal.

2. The thermal detection device of claim 1 , wherein a removable and rechargeable battery pack is configured to be inserted into a handle portion of the outer housing for providing power to the thermal detection device.

3. The thermal detection device of claim 1 , wherein the first thermopile array has a resolution of less than or equal to 160 pixels by 160 pixels.

4. The thermal detection device of claim 3 , wherein the first thermopile array has a resolution of less than or equal to 64 pixels by 64 pixels.

5. The thermal detection device of claim 1 , wherein the thermal detection device does not include a shutter.

6. The thermal detection device of claim 5 , wherein one of the first control unit and the second control unit is further configured to access, from one of the first memory and the second memory, a pixel gain value for each of the first plurality of pixels within the first thermopile array.

7. The thermal detection device of claim 6 , wherein one of the first control unit and the second control unit is further configured to calculate new pixel gain values for each of the first plurality of pixels within the first thermopile array based on the accessed pixel gain values and a condition of the thermal detection device.

8. The thermal detection device of claim 7 , wherein the condition of the thermal detection device is the temperature related to the first thermopile array.

9. The thermal detection device of claim 5 , further comprising a thermocouple operable for making contact temperature measurements.

10. The thermal detection device of claim 1 , wherein the sub-housing is positioned substantially within the outer housing.

11. The thermal detection device of claim 10 , wherein each side surface of the sub-housing is metallic.

12. The thermal detection device of claim 1 , wherein the at least one metallic side surface is made of aluminum.

13. The thermal detection device of claim 1 , further comprising a first ambient temperature sensor positioned above the sub-housing, and a second ambient temperature sensor positioned below the sub-housing, the first ambient temperature sensor providing the temperature signal to the second control unit, the second ambient temperature sensor providing a second temperature signal to the second control unit.

Assignees

• Milwaukee Electric Tool Corp

Inventors

• Nguyen Evans H
• Mergener Matthew J
• Burch Wade
• Curtin James V
• Haas Zachary P
• Cabot Benjamin Oliver Ryan
• Mueckl Gareth

Classifications

• G01J5/064

  Ambient temperature sensor; Housing temperature sensor; Constructional details thereof · CPC title

• G01J5/80

  Calibration (using comparison with reference sources G01J5/52) · CPC title

• G01J5/028

  using a charging unit or battery · CPC title

• G01J5/04

  Casings · CPC title

• G01J5/084

  Adjustable or slidable · CPC title