Infrared temperature measurement and stabilization thereof

• US 10,260,954 B2
• Filed: 05/14/2015
• Issued: 04/16/2019
• Est. Priority Date: 07/08/2010
• Status: Active Grant

• Current Assignee: CVG Management Corporation (Commercial Vehicle Group Incorporated)
• Original Assignee: CVG Management Corporation (Commercial Vehicle Group Incorporated)
• Inventors: Maston, Robert
• Primary Examiner(s): Jo, Taeho
• Application Number:
  US15/312,265
• Publication Number:
  US 20170122811A1
• Time in Patent Office: 1,433 Days
• Field of Search: 250340
• CPC Class Codes: G01J 2005/063 Heating; Thermostating
• CPC Class Codes: G01J 5/04 Casings
• CPC Class Codes: G01J 5/041 Mountings in enclosures or in a particular environment
• CPC Class Codes: G01J 5/046 Materials; Selection of thermal materials
• CPC Class Codes: G01J 5/048 Protective parts
• CPC Class Codes: G01J 5/061 by controlling the temperature of the apparatus or parts thereof, e.g. using cooling means or thermostats
• CPC Class Codes: G01J 5/064 Ambient temperature sensor; Housing temperature sensor; Constructional details thereof
• CPC Class Codes: G01J 5/068 by controlling parameters other than temperature
• CPC Class Codes: G01J 5/0875 Windows; Arrangements for fastening thereof
• CPC Class Codes: G01J 5/10 using electric radiation detectors
• CPC Class Codes: G01J 5/12 using thermoelectric elements, e.g. thermocouples
• CPC Class Codes: G01J 5/20 using resistors, thermistors or semiconductors sensitive to radiation, e.g. photoconductive devices

Abstract

Infrared (IR) temperature measurement and stabilization systems, and methods related thereto are provided. One or more embodiments passively stabilizes temperatures of objects in proximity and within the path between an infrared (IR) sensor and target object. A protective housing may encase an IR sensor, which may include a sensing element or IR element, a circuit or signal processor, and a housing seal plug. The IR element may be thermally bonded with a frame or conductive top hat.

Claims

1. An infrared (IR) temperature monitoring system, comprising:

a protective housing having an open end and closed end, wherein the protective housing is plastic;

an IR temperature sensor element (sensor element) having a protective sensor housing which encases an IR element,

wherein the protective housing encases the sensor element and the sensor housing,

wherein the protective housing is a cap that shields the sensor element from one or more environmental effects; and

a metallic frame positioned upon an inner portion of the closed end of the protective housing, the metallic frame encompasses a transmissive window in the closed end of the protective housing, and the metallic frame provides a stable temperature around the transmissive window,

wherein the metallic frame is a conductive top hat,

wherein the conductive top hat establishes a stable thermal link between the transmissive window and the sensor element.

2. The system of claim 1, wherein the IR element is positioned on a signal processor.

3. The system of claim 1, comprising a housing seal plug.

4. The system of claim 1, wherein the protective housing is cylindrical in shape.

5. The system of claim 1, wherein the metallic frame is formed of copper, aluminum, or other thermally conductive material.

6. The system of claim 1, wherein the sensor housing is formed of plastic that acts as a lens arranged at one end of the IR element and a baseplate mounted to the other end of the IR element.

7. The system of claim 1, comprising one or more glass fillers that hermetically seal one or more leads traversing through a baseplate of the IR element.

8. The system of claim 1, wherein the protective housing and metallic frame are thermally coupled such that a temperature of a protective housing lens within the protective housing does not disrupt an intended temperature, setpoint temperature, or target temperature, allowing the outside, external, or ambient temperature measurement to be made.

9. A method for infrared (IR) temperature monitoring, comprising:

encasing a sensor element with a protective housing;

encasing the sensor element with a protective housing having an open end and closed end, wherein the protective housing is a cap that shields the sensor element from one or more environmental effects, wherein the protective housing is plastic; and

positioning a metallic frame upon an inner portion of the closed end of the protective housing, wherein the metallic frame encompasses a transmissive window in the closed end of the protective housing, wherein the metallic frame provides a stable temperature around the transmissive window,

wherein the metallic frame is a conductive top hat.

10. The method of claim 9, wherein the protective housing comprises an integral lens formed of the same material as the protective housing.

11. The method of claim 9, wherein the sensor element is positioned on a signal processor.

12. The method of claim 11, wherein the signal processor is implemented as a circuit.

13. The method of claim 9, wherein a housing seal plug completes an internal system seal impervious to one or more of the environmental effects.

14. The method of claim 9, wherein the protective housing is cylindrical in shape.

15. The method of claim 9, wherein the metallic frame is formed of copper, aluminum, or other thermally conductive material.

16. The method of claim 9, wherein the protective housing and metallic frame are thermally coupled such that a temperature of a protective housing lens within the protective housing does not disrupt an intended temperature, setpoint temperature, or target temperature, allowing the outside, external, or ambient temperature measurement to be made.

17. An infrared (IR) temperature monitoring system, comprising:

a protective housing having an open end and closed end;

an IR temperature sensor having a sensor housing which encases an IR element, wherein the protective housing encases the IR temperature sensor and the sensor housing, wherein the protective housing is a plastic cap that shields the sensor housing and the IR temperature sensor from one or more environmental effects;

a metallic frame positioned upon an inner portion of the closed end of the protective housing, wherein the metallic frame encompasses a transmissive window in the closed end of the protective housing, wherein the metallic frame provides a stable temperature around the transmissive window; and

a housing plug to complete an internal system seal impervious to one or more of the environmental effects,

wherein the IR temperature sensor is actively stabilized using temperature control components, including resistive temperature devices, and circuitry.