Laser gas telemetering sensor structure with glass window heating and defrosting functions
By using a window heating device in the laser gas telemetry sensor, thin film heater and temperature sensing resistor preventing the icing and frost of the glass window, the blockage problem of laser sensor under low temperature conditions is solved and the normal operation of the sensor is ensured.
Patent Information
- Application Number
- CN202420777477.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-15
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-04-15
AI Technical Summary
In the low temperature conditions of existing laser gas telemetry sensors, the glass window will produce frost, blocking the laser emission and return reception.
A laser gas telemetry sensor structure including a shell, a gas telemeter, a window heating device and a glass window structure was designed. By installing a thin film heater and a window heating device with a temperature-sensitive resistor on the glass window, the elasticity of the ball-head plunger is utilized. It acts closely against the glass window and prevents icing and frost through heat conduction. The heater is powered on when the temperature is lower than 0°C, and the heating is stopped when the temperature is higher than 5°C.
It effectively prevents the icing and frost of the glass window, ensures the laser emission and return light reception, and ensures the accuracy and reliability of gas telemetry.
Smart Images
Figure CN222259150U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of laser gas telemetry sensors, in particular to a laser gas telemetry sensor structure with a glass window heating and defrosting function. Background Art
[0002] Laser gas telemetry sensors have been developed in recent years. They use tunable laser diode absorption spectroscopy analysis technology to detect characteristic gas leaks. When the product is working, a laser emitting device emits a laser of a specific wavelength. After the laser passes through the gas monitoring area, it reaches the reflecting surface and is reflected back to the light receiving device. If the characteristic gas to be detected exists in the gas area through which the laser passes, the laser will be absorbed by the characteristic gas. The higher the concentration of the characteristic gas, the greater the absorption. The laser detector will monitor the changes in laser intensity and feed it back to the control unit for processing, and finally obtain the detected concentration.
[0003] Laser gas telemetry sensors generally adopt explosion-proof design. This is because the sensors are used in explosion-proof areas and have explosion-proof requirements. In explosion-proof design, the threaded joint surface has the advantages of simple design, small structure and light weight compared to the screw fixed joint surface. The laser gas telemetry sensor has an explosion-proof glass window. The function of the glass window is first to play a flameproof role. Secondly, the laser needs to be emitted from the glass window. In addition, the reflected light must also pass through the glass window into the light return receiving device for reception and analysis. The glass window will frost under low temperature conditions, blocking the emission of the laser and the reception of the light return. Therefore, it is very necessary to design a heating and defrosting device for the glass window. Utility Model Content
[0004] In view of the deficiencies of the prior art, the purpose of the utility model is to provide a laser gas telemetry sensor structure with a glass window heating and defrosting function, which aims to solve the technical problem in the prior art that the glass window will frost under low temperature conditions, blocking the emission of laser and the reception of return light.
[0005] The technical solution of the utility model is: a laser gas telemetry sensor structure with a glass window heating and defrosting function, comprising a shell, a gas telemetry instrument, a window heating device, and a glass window structure; the gas telemetry instrument, the window heating device, and the glass window structure are respectively arranged at the front end of the shell; the gas telemetry instrument is located at the rear end of the window heating device; and the glass window structure is located at the front end of the window heating device.
[0006] Preferably, the gas telemeter is equipped with an explosion-proof glass window structure through the outer shell. The function of the glass window structure is first to serve as an explosion-proof structure. Secondly, the laser needs to be emitted from the glass window structure. In addition, the reflected return light must also pass through the glass window structure opening to enter the return light receiving device for reception and analysis. The glass window structure will produce frost under low temperature conditions, blocking the emission of the laser and the reception of the return light. Therefore, it is very necessary to set a window heating device for the glass window.
[0007] Preferably, the housing comprises a shell and a mounting bracket; a mounting bracket for fixing the gas telemeter, the window heating device and the glass window structure is provided at the front end of the shell.
[0008] Preferably, the gas telemeter includes a telemeter structure, an optical lens, a laser transmitter, and a laser receiver; an optical lens is arranged at the rear end of the telemeter structure; the laser transmitter and the laser receiver are powered and controlled by a power supply and control circuit board. When working, the laser transmitter emits a beam of laser, which is emitted through a glass window, reflected (or diffusely reflected) after being irradiated on a fixed reflective surface, and the reflected light (diffusely reflected light) passes through the glass window again, is collected by the optical lens, and is received by the laser receiver.
[0009] Preferably, a laser receiver is installed at the rear end of the optical lens; a laser transmitter is installed on the upper side of the rear end of the optical lens; and finally, the signal is analyzed and processed by the power supply and control circuit board to obtain the concentration value of the target gas.
[0010] Preferably, the window heating device includes a heating bracket, a ball plunger, a film heater and a temperature-sensitive resistor; a ball plunger is provided at the rear end of the heating bracket; the film heater and the temperature-sensitive resistor are respectively installed on the outer surface of the heating bracket; the window heating device is screwed on the outer shell. During installation, due to the elastic effect of the ball plunger, the film heater will fit tightly on the glass window fixing part, and transfer heat to the glass window piece through the heat conduction of the glass window fixing part. When the temperature is set below 0°C (including 0°C) in actual application, the film heater is powered on for heating, and when the temperature is higher than 5°C, the heating is stopped, thereby preventing the glass window from freezing or frosting, thereby blocking the optical transmission and reception of the gas telemeter through the glass window piece.
[0011] Preferably, the glass window structure includes a window structure, a glass window piece and a fixing part; a glass window piece is installed at the rear end of the inner side of the window structure; the glass window piece is made of thick tempered glass; a fixing part for fixing the glass window piece is provided at the rear end of the window structure; the glass window piece is tempered glass of a certain thickness, and constitutes an explosion-proof structure with the outer shell, the window structure and the glass window fixing part.
[0012] Beneficial effects of the utility model:
[0013] The window heating device of the utility model is screwed on the outer shell. When installed, due to the elastic effect of the ball head plunger, the film heater will fit tightly on the glass window fixing part, and transfer heat to the glass window piece through the heat conduction of the glass window fixing part. When the setting temperature is lower than 0°C (including 0°C) in actual application, the film heater is powered on for heating, and when the temperature is higher than 5°C, the heating is stopped, thereby preventing the glass window from being frozen or frosted, thereby blocking the optical transmission and reception of the gas telemeter through the glass window piece. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 What is shown is the overall structural schematic diagram of the laser gas telemetry sensor structure of the utility model;
[0015] Figure 2 Shown is a schematic diagram of the shell structure of the laser gas telemetry sensor structure of the utility model;
[0016] Figure 3 The present invention shows a schematic diagram of the structure of a gas telemeter of the laser gas telemetering sensor structure of the present invention;
[0017] Figure 4 Shown is a schematic diagram of the window heating device structure of the laser gas telemetry sensor structure of the present utility model.
[0018] Figure 5 Shown is a schematic diagram of the side structure of the window heating device of the laser gas telemetry sensor structure of the present utility model.
[0019] Figure 6 The other side of the window heating device of the laser gas telemetry sensor structure of the utility model is shown
[0020] Figure 7 What is shown is a schematic diagram of the glass window structure of the laser gas telemetry sensor structure of the present utility model.
[0021] Explanation of the reference numerals: 100, outer shell; 101, housing; 102, mounting bracket; 200, gas telemeter; 201, telemeter structure; 202, optical lens; 203, laser transmitter; 204, laser receiver; 300, window heating device; 301, heating bracket; 302, ball plunger; 303, film heater; 304, temperature sensing resistor; 400, glass window structure; 401, window structure; 402, glass window piece; 403, fixing part. DETAILED DESCRIPTION
[0022] The utility model is further described below in conjunction with the accompanying drawings and embodiments.
[0023] See also Figure 1The utility model provides an embodiment: a laser gas remote sensing sensor structure with a glass window heating and defrosting function, comprising a housing 100, a gas remote sensing instrument 200, a window heating device 300, and a glass window structure 400; the gas remote sensing instrument 200, the window heating device 300 and the glass window structure 400 are respectively arranged at the front end of the housing 100; the gas remote sensing instrument 200 is located at the rear end of the window heating device 300; the glass window structure 400 is located at the front end of the window heating device 300.
[0024] See also Figure 2 In this embodiment, the housing 100 includes a shell 101 and a mounting bracket 102 ; the front end of the shell 101 is provided with a mounting bracket 102 for fixing the gas remote detector 200 , the window heating device 300 and the glass window structure 400 .
[0025] See also Figure 3 In this embodiment, the gas telemeter 200 includes a telemeter structure 201, an optical lens 202, a laser transmitter 203, and a laser receiver 204; the optical lens 202 is arranged at the rear end of the telemeter structure 201; the laser transmitter 203 and the laser receiver 204 are powered and controlled by the power supply and control circuit board. When working, the laser transmitter 203 emits a laser beam, which is emitted through the glass window piece 402, reflected (or diffusely reflected) after being irradiated on the fixed reflection surface, and the reflected light (diffusely reflected light) passes through the glass window piece 402 again, is collected by the optical lens 202, and is received by the laser receiver 204. The laser receiver 204 is installed at the rear end of the optical lens 202; the laser transmitter 203 is installed on the upper side of the rear end of the optical lens 202; finally, the signal is analyzed and processed by the power supply and control circuit board to obtain the concentration value of the target gas.
[0026] See also Figure 4-6 In this embodiment, the window heating device 300 includes a heating bracket 301, a ball plunger 302, a film heater 303 and a temperature-sensitive resistor 304; a ball plunger 302 is provided at the rear end of the heating bracket 301; the film heater 303 and the temperature-sensitive resistor 304 are respectively installed on the outer surface of the heating bracket 301; the window heating device 300 is screwed on the housing 100. During installation, due to the elastic effect of the ball plunger 302, the film heater will fit tightly on the glass window fixing piece 403, and transfer heat to the glass window piece 402 through the heat conduction of the glass window fixing piece 403. In actual application, the temperature is set below 0°C (including 0°C), and the film heater 303 is powered on for heating. When the temperature is higher than 5°C, the heating is stopped, thereby preventing the glass window from freezing or frosting, thereby blocking the optical transmission and reception of the gas telemeter 200 through the glass window piece 402.
[0027] See also Figure 7In this embodiment, the glass window structure 400 includes a window structure 401, a glass window piece 402 and a fixing piece 403; the glass window piece 402 is installed at the rear end of the inner side of the window structure 401; the glass window piece 402 is made of thick tempered glass; a fixing piece 403 for fixing the glass window piece 402 is provided at the rear end of the window structure 401; the glass window piece 402 is a tempered glass of a certain thickness, and together with the housing 100, the window structure 401 and the glass window fixing piece 403, forms an explosion-proof structure.
[0028] During operation, the gas remote meter 200 is mounted on the mounting bracket 102 of the housing 100, the window heating device 300 is placed on the mounting bracket 102, the ball plunger 302 faces the positioning hole of the mounting bracket 102, the window heating device 300 is screwed onto the housing 100 through threads, and the film heater 303 and the temperature sensing resistor 304 are powered and controlled through the power supply and control circuit board.
[0029] The glass window piece 402 is a tempered glass of a certain thickness, and together with the housing 100 , the window structural member 401 , and the glass window fixing member 403 , forms an explosion-proof structure.
[0030] The laser transmitter 203 and the laser receiver 204 are powered and controlled by the power supply and control circuit board. When working, the laser transmitter 203 emits a laser beam, which is emitted through the glass window piece 402, reflected (or diffusely reflected) after being irradiated on the fixed reflection surface, and the reflected light (diffusely reflected light) passes through the glass window piece 402 again, is collected by the optical lens 202, and is received by the laser receiver 204. Finally, the signal is analyzed and processed by the power supply and control circuit board to obtain the concentration value of the target gas.
[0031] The window heating device 300 is screwed onto the housing 100. During installation, due to the elastic effect of the ball plunger 302, the film heater 303 will fit tightly onto the glass window fixture 403, and transfer heat to the glass window piece 402 through heat conduction of the glass window fixture 403. During actual application, the temperature is set below 0°C (including 0°C), and the film heater 303 is powered on for heating. When the temperature is higher than 5°C, the heating is stopped, thereby preventing the glass window from freezing or frosting, thereby blocking the optical transmission and reception of the gas telemeter 200 through the glass window piece 402.
[0032] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.
Claims
1. A laser gas telemetry sensor structure with a glass window heating and defrosting function, comprising a housing (100); characterized in that: It also includes a gas remote detector (200), a window heating device (300), and a glass window structure (400); the gas remote detector (200), the window heating device (300), and the glass window structure (400) are respectively arranged at the front end of the housing (100); the gas remote detector (200) is located at the rear end of the window heating device (300); and the glass window structure (400) is located at the front end of the window heating device (300).
2. The laser gas telemetry sensor structure with glass window heating and defrosting function according to claim 1 is characterized in that: The housing (100) comprises a shell (101) and a mounting bracket (102); the front end of the shell (101) is provided with a mounting bracket (102) for fixing a gas remote detector (200), a window heating device (300) and a glass window structure (400).
3. The laser gas telemetry sensor structure with glass window heating and defrosting function according to claim 1 is characterized in that: The gas telemeter (200) comprises a telemeter structure (201), an optical lens (202), a laser transmitter (203), and a laser receiver (204); the optical lens (202) is arranged at the rear end of the telemeter structure (201).
4. The laser gas telemetry sensor structure with glass window heating and defrosting function according to claim 3 is characterized in that: A laser receiver (204) is installed at the rear end of the optical lens (202); and a laser transmitter (203) is installed at the upper side of the rear end of the optical lens (202).
5. The laser gas telemetry sensor structure with glass window heating and defrosting function according to claim 1 is characterized in that: The window heating device (300) comprises a heating bracket (301), a ball plunger (302), a film heater (303) and a temperature-sensitive resistor (304); the rear end of the heating bracket (301) is provided with a ball plunger (302); and the outer surface of the heating bracket (301) is respectively provided with a film heater (303) and a temperature-sensitive resistor (304).
6. The laser gas telemetry sensor structure with glass window heating and defrosting function according to claim 1 is characterized in that: The glass window structure (400) comprises a window structure (401), a glass window piece (402) and a fixing piece (403); the glass window piece (402) is installed at the rear end of the inner side of the window structure (401); the glass window piece (402) is made of thick tempered glass; and the fixing piece (403) for fixing the glass window piece (402) is arranged at the rear end of the window structure (401).