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Detection circuit with smoke concentration infrared detection function and detection method of detection circuit

A smoke concentration and infrared detection technology, which is applied to heating methods, measuring devices, and oil fume removal, can solve the problems of large test values, complex structure of detection devices, and high cost, and achieve the effect of solving the impact

Pending Publication Date: 2019-09-06
VATTI CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The smoke concentration of range hoods is usually detected by infrared light. The method of infrared smoke concentration detection is simple, feasible and low in cost. However, infrared detection is usually greatly affected by ambient light and ambient temperature; In order to reduce the impact of ambient light, the smoke channel is specifically designed as a maze, and the labyrinth-shaped smoke channel forms an ambient light darkroom, thereby reducing the impact of ambient light. However, the detection device has a complex structure and high cost; in addition, infrared light accepts Due to the influence of temperature, the test value will be too large when the temperature rises, and the temperature drift characteristics of the infrared light receiving tube affect the accuracy of smoke concentration detection

Method used

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  • Detection circuit with smoke concentration infrared detection function and detection method of detection circuit
  • Detection circuit with smoke concentration infrared detection function and detection method of detection circuit
  • Detection circuit with smoke concentration infrared detection function and detection method of detection circuit

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Effect test

Embodiment 1

[0031] Embodiment 1 of the present invention provides a detection circuit for infrared detection of smoke concentration, such as figure 1 As shown, it includes a processing module 1, an infrared receiving tube 2, and an infrared emitting tube 3; the infrared receiving tube 2 is connected to the processing module 1, and is used to collect the current ambient light and smoke to obtain the corresponding voltage signal of the current ambient light and smoke, and send to The processing module 1 sends the voltage signal corresponding to the current ambient light and smog; the processing module 1 is connected with the infrared emitting tube 3, and is used to control the opening and closing of the infrared emitting tube 3; the processing module 1 is used for the voltage of the infrared receiving tube 2 The signal performs ambient light compensation to obtain the smoke concentration corresponding to the current smoke.

[0032]Wherein, the processing module 1 includes a first chip U1, a...

Embodiment 2

[0039] Embodiment 2 of the present invention provides a detection circuit for infrared detection of smoke concentration, such as figure 2 As shown, it includes a processing module 1, an infrared receiving tube 2, and an infrared emitting tube 3; the infrared receiving tube 2 is connected to the processing module 1, and is used to collect the current ambient light and smoke to obtain the corresponding voltage signal of the current ambient light and smoke, and send to The processing module 1 sends the voltage signal corresponding to the current ambient light and smog; the processing module 1 is connected with the infrared emitting tube 3, and is used to control the opening and closing of the infrared emitting tube 3; the processing module 1 is used for the voltage of the infrared receiving tube 2 The signal is compensated to obtain the smoke concentration corresponding to the current smoke;

[0040] It also includes a temperature compensation circuit 4, the temperature compensa...

Embodiment 3

[0050] Embodiment 2 of the present invention provides a detection circuit for infrared detection of smoke concentration, such as image 3 As shown, it includes a processing module 1, an infrared receiving tube 2, and an infrared emitting tube 3; the infrared receiving tube 2 is connected to the processing module 1, and is used to collect the current ambient light and smoke to obtain the corresponding voltage signal of the current ambient light and smoke, and send to The processing module 1 sends the voltage signal corresponding to the current ambient light and smog; the processing module 1 is connected with the infrared emitting tube 3, and is used to control the opening and closing of the infrared emitting tube 3; the processing module 1 is used for the voltage of the infrared receiving tube 2 The signal is compensated to obtain the smoke concentration corresponding to the current smoke;

[0051] It also includes a temperature compensation circuit 4, the temperature compensat...

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Abstract

The invention discloses a detection circuit with a smoke concentration infrared detection function and a detection method of the detection circuit. The detection circuit comprises a processing module,an infrared receiving tube and an infrared transmitting tube, wherein the infrared receiving tube is connected with the processing module and is used for collecting current ambient light and currentsmoke to acquire voltage signals corresponding to the current ambient light and the current smoke and sending the voltage signals corresponding to the current ambient light and the current smoke to the processing module; the processing module is connected with the infrared transmitting tube and is used for controlling turn-on and turn-off of the infrared transmitting tube; and the processing module is used for performing compensation according to the voltage signals of the infrared receiving tube to obtain the smoke concentration corresponding to the current smoke. In this way, the voltage signals corresponding to the ambient light and infrared light used for smoke detection are detected respectively by controlling the turn-on and turn-off of the infrared transmitting tube, and the influence of the ambient light on a test result can be effectively corrected. Besides, according to negative temperature characteristics of PN junctions of diodes, a temperature compensation circuit is adopted to perform temperature correction, and therefore the influence of temperature drift characteristics of the infrared receiving tube on the test result can be effectively solved.

Description

technical field [0001] The invention belongs to the technical field of range hood control, and in particular relates to a detection circuit for infrared detection of smoke concentration and a detection method thereof. Background technique [0002] Infrared smoke concentration detection is a feasible means of low-cost smoke concentration detection. The smoke concentration of range hoods is usually detected by infrared light. The method of infrared smoke concentration detection is simple, feasible and low in cost. However, infrared detection is usually greatly affected by ambient light and ambient temperature; In order to reduce the impact of ambient light, the smoke channel is specifically designed as a maze, and the labyrinth-shaped smoke channel forms an ambient light darkroom, thereby reducing the impact of ambient light. However, the detection device has a complex structure and high cost; in addition, infrared light accepts Due to the influence of temperature, the test v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/01F24C15/20G01N21/3504
CPCG01N21/01G01N21/3504F24C15/2021
Inventor 闫旺刘明雄潘叶江
Owner VATTI CORP LTD
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