Contact Infrared Sensor Thermal Segmentation

The temperature sensor is divided into two distinct parts: a temperature-sensitive section that contacts the high-temperature exhaust gas and an infrared temperature detecting member that remains in a lower-temperature environment. This segmentation allows each part to perform its function optimally without suffering from thermal deterioration.

The patent introduces an intermediary optical system (including a light guide pipe and infrared transmitting window) that transfers thermal information from the high-temperature exhaust gas to the detecting member indirectly. This intermediary mechanism enables temperature measurement without direct thermal contact between the sensing element and the hot gas.

By segmenting the sensor into a temperature-sensitive section and a detecting member, the patent eliminates the need for expensive heat-resistant materials in the detecting member. Only the temperature-sensitive section requires thermal resistance, while the detecting member can use standard, cost-effective components.

The optical intermediary system allows the use of conventional, low-cost detecting members that are not designed for high-temperature environments. This approach significantly reduces manufacturing costs compared to using specialized high-temperature sensing materials.

The patent uses an optical intermediary system (light guide pipe, infrared transmitting window) to transfer infrared radiation from the temperature-sensitive section to the detecting member. This intermediary approach maintains measurement simplicity while protecting the detecting member from thermal damage.

The detecting member is extracted from the high-temperature environment and placed in a lower-temperature zone. The optical system extracts and transports the thermal measurement information without transporting the heat itself, thereby protecting the detecting member.