A cooktop appliance includes a cooking panel comprising a heating zone, an infrared (IR) sensor array positioned below the heating zone, the IR sensor array comprising a shielded IR sensor and an IR source, and a controller operatively coupled to the shielded IR sensor and the IR source. The controller is configured to receive a first signal from the shielded IR sensor, energize the IR source to illuminate a pan in the heating zone, receive a second signal from the shielded IR sensor, identify a fault in the IR sensor array based on a comparison between the first signal and the second signal, and generate a fault signal in response to identifying the fault in the IR sensor array.

A cooktop appliance includes a cooking panel comprising a heating zone, an infrared (IR) sensor array positioned below the heating zone, the IR sensor array comprising a shielded IR sensor and an IR source, and a controller operatively coupled to the shielded IR sensor and the IR source. The controller is configured to receive a first signal from the shielded IR sensor, energize the IR source to illuminate a pan in the heating zone, receive a second signal from the shielded IR sensor, identify a fault in the IR sensor array based on a comparison between the first signal and the second signal, and generate a fault signal in response to identifying the fault in the IR sensor array.

A passive infrared sensor sensitivity adjustment device includes a processing module, a sensitivity control module and a sensing function adjustment module. The processing module receives an input signal and generates a sensitivity control signal accordingly. The sensitivity control module is connected to the processing module, receives the sensitivity control signal, and generates a sensitivity adjustment signal accordingly. The sensing function adjustment module is connected to the processing module and the sensitivity control module, and receives the sensitivity adjustment signal and a sensing signal generated by the passive infrared sensor. The sensing function adjustment module adjusts a preset threshold value according to the sensitivity adjustment signal, and compares the sensing signal with the preset threshold value to generate a voltage signal. The processing module generates a start signal according to the voltage signal to activate the target device or not generate the start signal according to the voltage signal.

A passive infrared sensor sensitivity adjustment device includes a processing module, a sensitivity control module and a sensing function adjustment module. The processing module receives an input signal and generates a sensitivity control signal accordingly. The sensitivity control module is connected to the processing module, receives the sensitivity control signal, and generates a sensitivity adjustment signal accordingly. The sensing function adjustment module is connected to the processing module and the sensitivity control module, and receives the sensitivity adjustment signal and a sensing signal generated by the passive infrared sensor. The sensing function adjustment module adjusts a preset threshold value according to the sensitivity adjustment signal, and compares the sensing signal with the preset threshold value to generate a voltage signal. The processing module generates a start signal according to the voltage signal to activate the target device or not generate the start signal according to the voltage signal.

A device for measuring the performance of an optical detector includes a cryostat, a holder capable of receiving the detector, secured to the inside of the cryostat, and means for measuring the performance of the detector. It also includes a screen arranged around the holder capable of limiting the radiation likely to reach the holder in a wavelength range of the detector, and a single-mode optical fiber in the wavelength range of the detector, inserted in an opening of the cryostat. The device further comprises at least one luminous flux generation module that incorporates a fibered source capable of generating the luminous flux in the optical fiber.

A device for measuring the performance of an optical detector includes a cryostat, a holder capable of receiving the detector, secured to the inside of the cryostat, and means for measuring the performance of the detector. It also includes a screen arranged around the holder capable of limiting the radiation likely to reach the holder in a wavelength range of the detector, and a single-mode optical fiber in the wavelength range of the detector, inserted in an opening of the cryostat. The device further comprises at least one luminous flux generation module that incorporates a fibered source capable of generating the luminous flux in the optical fiber.