Ground radiometer

Abstract

The invention discloses a radiometer to the ground, which comprises a shell and a dust blocking sleeve fixedly arranged at the bottom end of the shell, a dust blocking diaphragm is fixedly arranged in the dust blocking sleeve, the dust blocking diaphragm is provided with nine optical channel holes which are circumferentially distributed, and the dust blocking diaphragm is also provided with three internal thread seat holes which are circumferentially distributed; a locking assembly is arranged in the internal thread seat hole and comprises a positioning sleeve seat, a tightening block arranged in the positioning sleeve seat and a pre-tightening spring arranged in the positioning sleeve seat, and a positioning guide shaft is installed at the upper end of the pre-tightening spring. According to the invention, the dust blocking sleeve is in threaded connection with the bottom of the shell, and the dust blocking diaphragm is in threaded connection with the interior of the dust blocking sleeve, so that the installation efficiency and the convenience of after-sales maintenance of the light window are improved, and any tool is not needed to disassemble any screw to complete the cleaning operation after pollution of the light window glass.

Description

Technical Field

[0001] The invention relates to the technical field of optical measurement, in particular to a ground radiometer. Background Art

[0002] The ground radiometer has been unattended for long-term real-time measurement outdoors. Because some experimental sites are in the wild and there is a lot of sand and dust, the light entrance and the window glass of the channel-type ground radiometer are covered with dust pollution, which often requires the lens to be cleaned, which is troublesome. In addition, the ground radiometer is not well sealed, which causes moisture inside. The moisture inside the optical body affects the accuracy of data measurement, especially in places with a large temperature difference between day and night. In the morning, moisture and water droplets will appear on the window glass, affecting the ground radiation data measurement. Changes in the optical body environment will cause signal interference to the photoelectric detection element, affecting the accuracy and scientificity of data measurement. Summary of the invention

[0003] 1. Technical issues to be solved

[0004] In view of the deficiencies in the prior art, the present invention provides a ground radiometer that solves the problems raised in the above background technology.

[0005] (II) Technical solution

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a ground radiometer, comprising a shell, a dust shield sleeve fixedly installed on the bottom end of the shell, a dust shield aperture piece fixedly installed inside the dust shield sleeve, the dust shield aperture piece has nine circumferentially distributed light channel holes, the dust shield aperture piece also has three circumferentially distributed internal threaded seat holes, a locking assembly is arranged inside the internal threaded seat hole, the locking assembly comprises a positioning sleeve seat, a tightening block arranged inside the positioning sleeve seat, a preload spring arranged in the positioning sleeve seat, a positioning guide shaft is installed on the upper end of the preload spring, and the upper end of the positioning guide shaft passes through the outside of the positioning sleeve seat; an upper end cover is fixedly connected to the inner wall of the shell, a concave hole is opened at the bottom of the shell, and the positioning guide shaft is clamped in the concave hole.

[0007] Preferably, an optical body is arranged inside the shell, and the optical body comprises an upper optical body sleeve, a lower optical body sleeve fixedly mounted on the bottom end of the upper optical body sleeve, and an optical body upper cover fixedly mounted on the top end of the upper optical body sleeve; a light blocking wheel assembly is arranged inside the lower optical body sleeve, and a stray stop diaphragm and a field stop are also arranged inside the lower optical body sleeve, and the stray stop diaphragm is located above the field stop; a temperature control and data acquisition unit is arranged inside the upper optical body sleeve; the upper optical body sleeve has a special near-infrared channel, and a detector heat sink is arranged inside the special near-infrared channel, a detector is fixedly mounted on the detector heat sink through a detector pressing plate, and the detector pin passes through the detector heat sink and is connected to a detector circuit board, an aperture diaphragm is arranged below the detector, and a filter is arranged below the aperture diaphragm, and the filter is fixed to the upper optical body sleeve through a filter fixing member, and the filter and the filter fixing member are provided with an elastic element for protecting the filter, and the filter is located above the stray stop diaphragm.

[0008] Preferably, the light-blocking wheel assembly includes a motor fixing plate, a motor fixedly mounted on the bottom of the motor fixing plate, and a light-blocking wheel fixed to the output end of the motor, the light-blocking wheel is provided with nine circumferentially distributed through holes, and a Hall switch is arranged inside the upper optical body sleeve.

[0009] Preferably, a light window seat is fixedly mounted on the bottom end of the lower optical body sleeve, a light window glass is embedded in the light window seat, and a sealing gasket is arranged between the lower optical body sleeve and the light window seat.

[0010] Preferably, a wiring hole is provided on the upper optical body sleeve.

[0011] Preferably, a thermoelectric cooler protective inner shell is embedded in the top of the outer shell, a thermoelectric cooler is arranged inside the thermoelectric cooler protective inner shell, a thermoelectric cooler protective outer shell is arranged outside the thermoelectric cooler protective inner shell, and a rain shield is arranged outside the thermoelectric cooler protective outer shell.

[0012] Preferably, a sealing element is provided between the upper optical body sleeve and the lower optical body sleeve.

[0013] Preferably, thermal insulation cotton is provided between the optical body and the outer shell.

[0014] (III) Beneficial effects

[0015] The present invention provides a ground radiometer, which has the following beneficial effects:

[0016] 1. In the present invention, the dust shield sleeve is connected to the bottom of the housing by threading, and the dust shield aperture piece is connected to the inner thread of the dust shield sleeve, which improves the convenience of installation and after-sales maintenance of the light window. It is not necessary to bring any tools to remove any screw to complete the cleaning operation after the light window glass is polluted. Due to the combination of the dust shield sleeve and the nine-hole dust shield aperture, it is ensured that the direct contact area between the light window glass and the outdoors is reduced without affecting the measurement, thereby reducing the pollution of air dust and the interference effect on the measurement, and extending the maintenance cycle. The nine holes of the dust shield aperture piece and the nine channel holes are concentric and aligned through the contact cooperation of the positioning guide shaft and the concave hole. Specifically, after the three locking components are installed on the dust shield aperture piece, the dust shield sleeve is installed as a whole, and the end of the dust shield sleeve is screwed into the rotating housing so that the positioning guide shaft enters the concave hole. The locking adjustment block has the effect of increasing the preload force, and also has the effect of increasing the pressure of the outer thread of the positioning sleeve and the inner thread of the dust shield aperture piece, thereby improving the friction self-locking effect.

[0017] 2. In the present invention, a sealing gasket is provided between the lower optical main body sleeve and the light window seat, and a sealing element is provided between the upper optical main body sleeve and the lower optical main body sleeve to solve the problem of water leakage and air leakage in the connection and avoid affecting the use of the elements; the cured sealing bonding between the light window base and the light window glass and the step hole design of the light window base are firstly to guide the positioning of the light window glass, and a glue injection groove of a certain width and thickness is left at the back to improve the firmness and reliability of the bonding of the light window glass and increase the sealing performance.

[0018] 3. The present invention adds a temperature differential cooler and a light-blocking wheel assembly for overall temperature control of the optical head body, as well as optimization of the heat conduction structure of the special near-infrared channel that is more affected, thereby eliminating the measurement data error caused by the temperature drift effect of the detector. After the data is normalized, it is convenient for statistical analysis and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a cross-sectional structural diagram of the general assembly of a ground radiometer proposed by the present invention;

[0020] Figure 2 for Figure 1 A magnified structural diagram;

[0021] Figure 3 A three-dimensional structural diagram of a dust shield sleeve of a ground radiometer proposed by the present invention;

[0022] Figure 4 This is a front view structural diagram of the optical body of an earth radiometer proposed by the present invention;

[0023] Figure 5 This is a right-view cross-sectional structural diagram of an optical body of an earth radiometer proposed by the present invention;

[0024] Figure 6 for Figure 5 The enlarged structure diagram at B;

[0025] Figure 7 This is a structural diagram of a light-blocking wheel assembly of a ground radiometer proposed by the present invention;

[0026] Figure 8 for Figure 4 CC cross-sectional structure diagram;

[0027] Fig. 9 for Figure 5 Enlarged structural diagram at D.

[0028] In the figure: 1, housing; 2, dust shield sleeve; 3, dust shield aperture; 4, upper end cover; 5, optical body; 51, upper optical body sleeve; 511, temperature control and data acquisition unit; 512, detector circuit board; 513, detector heat sink; 514, detector pressure plate; 515, detector; 516, filter; 517, aperture aperture; 518, wiring hole; 519, elastic element; 520, filter fixing piece; 52, lower optical body sleeve; 521, stray diaphragm; 522, field diaphragm; 53. Optical body upper cover; 54. Light blocking wheel assembly; 541. Motor fixing plate; 542. Light blocking wheel; 5421. Through hole; 543. Motor; 55. Sealing element; 56. Sealing gasket; 57. Light window glass; 58. Light window seat; 59. Hall switch; 6. Thermal insulation cotton; 7. Locking assembly; 71. Tightening block; 72. Preload spring; 73. Positioning sleeve seat; 74. Positioning guide shaft; 8. Rain shield; 9. Temperature difference refrigerator; 10. Temperature difference refrigerator protective inner shell; 11. Temperature difference refrigerator protective outer shell. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] See also Figures 1 to 9The present invention provides a technical solution: a ground radiometer, comprising a shell 1, a dust shield sleeve 2 fixedly mounted on the bottom end of the shell 1, a dust shield aperture piece 3 fixedly mounted inside the dust shield sleeve 2, the dust shield aperture piece 3 having nine circumferentially distributed light channel holes, the dust shield aperture piece 3 also having three circumferentially distributed internal threaded seat holes, a locking assembly 7 is arranged inside the internal threaded seat hole, the locking assembly 7 comprises a positioning sleeve seat 73, a tightening block 71 arranged inside the positioning sleeve seat 73, a preload spring 72 arranged inside the positioning sleeve seat 73, a positioning guide shaft 74 is installed on the upper end of the preload spring 72, and the upper end of the positioning guide shaft 74 passes through the outside of the positioning sleeve seat 73; an upper end cover 4 is fixedly connected to the inner wall of the shell 1, a concave hole is opened at the bottom of the shell 1, and the positioning guide shaft 74 is clamped in the concave hole.

[0031] The three positioning sleeve seats 73 are screwed into the internal threaded seat holes, and then the dust stop aperture plate 3 is installed as a whole into the dust stop sleeve 2, and the end of the dust stop sleeve 2 is screwed into the rotating outer shell 1, so that the positioning guide shaft 74 enters the recessed hole under the thrust of the preload spring 72, thereby achieving the purpose of connecting and installing the dust stop sleeve 2 and the outer shell 1; since the tightening block 71 is threadedly connected to the positioning sleeve seat 73, by rotating the tightening block 71, the preload force is increased, and the pressure of the external thread of the positioning sleeve seat 73 and the internal thread of the dust stop aperture plate 3 is increased, thereby improving the friction self-locking effect.

[0032] An optical body 5 is arranged inside the housing 1, and the optical body 5 includes an upper optical body sleeve 51, a lower optical body sleeve 52 fixedly mounted on the bottom end of the upper optical body sleeve 51, and an optical body upper cover 53 fixedly mounted on the top end of the upper optical body sleeve 51. A light blocking wheel assembly 54 is arranged inside the lower optical body sleeve 52, and a stray-eliminating diaphragm 521 and a field diaphragm 522 are also arranged inside the lower optical body sleeve 52. The stray-eliminating diaphragm 521 is located above the field diaphragm 522. A temperature control and data acquisition unit 511 is arranged inside the upper optical body sleeve 51; the upper optical body sleeve 51 has a special near-infrared channel, and the special near-infrared A detector heat sink 513 is provided inside the outer channel, and a detector 515 is fixedly mounted on the detector heat sink 513 through a detector pressing plate 514. The pin of the detector 515 passes through the detector heat sink 513 and is connected to the detector circuit board 512. An aperture diaphragm 517 is provided below the detector 515, and a filter 516 is provided below the aperture diaphragm 517. The filter 516 is fixed to the upper optical body sleeve 51 through a filter fixing part 520. The filter 516 and the filter fixing part 520 are provided with an elastic element 519 for protecting the filter 516. The filter 516 is located above the de-interlacing diaphragm 521.

[0033] The detector 515 is a cooling detector. The heat generated by the detector 515 is quickly transferred to the detector heat sink 513, and the heat is quickly guided to the upper surface of the upper optical body sleeve 51, which expands the heat dissipation area and efficiency. The outside of the optical body 5 is insulated from the outside world with thermal insulation cotton 6. There is a temperature difference refrigerator 9 on the top, which is a semiconductor cooling device with Peltier effect. It can heat up or cool down the optical body 5. The temperature difference refrigerator 9 is controlled by the temperature control and data acquisition unit 511. The heat generated by the detector 515 itself is quickly dissipated to the optical body 5, and the heat is transferred to the temperature difference refrigerator 9. By changing the heat conduction method of active heat dissipation, the cooling efficiency of the cooling detector is improved, thereby improving the temperature control effect and reducing the interference of temperature on the measurement signal.

[0034] The upper optical body sleeve 51 is a hollow structure, which facilitates the wiring of the temperature control and data acquisition unit 511 to the plug position. The temperature control and data acquisition unit 511 is used to collect optical signals and adjust the temperature of the optical body 5.

[0035] The anti-scattering aperture 521 and the field aperture 522 of each channel constitute the optical path system of the light entrance channel with a certain field angle. The front end surface of the lower optical main body sleeve 52 is a simulated conical hole and an optical channel system of 9 channels evenly distributed along the circumference. The middle and rear part is a structure with a countersunk hole, which perfectly embeds the motor 543 inside, improves the space utilization of the equipment, and makes the equipment more delicate and compact.

[0036] The split design of the upper optical main body sleeve 51 greatly reduces the difficulty of processing and improves the processing accuracy and efficiency. The upper optical main body sleeve 51 and the lower optical main body sleeve 52 are precisely positioned by a centering structure with a close tolerance fit and an axial positioning block device through an embedded installation, and the concentricity of the upper optical main body sleeve 51 and the lower optical main body sleeve 52 and the concentricity requirements of each channel are also prevented. Errors in the corresponding assembly of the channels caused by misoperation are also prevented.

[0037] The light-blocking wheel assembly 54 includes a motor fixing plate 541, a motor 543 fixedly mounted on the bottom of the motor fixing plate 541, and a light-blocking wheel 542 fixed to the output end of the motor 543. The light-blocking wheel 542 is provided with nine circumferentially distributed through holes 5421, and a Hall switch 59 is arranged inside the upper optical body sleeve 51.

[0038] The Hall switch 59 is fixed at the theoretical position at the bottom of the upper optical body sleeve 51, and is used for the initial reset position signal excitation input of the motion control of the light blocking wheel 542. The 9 through holes 5421 of the light blocking wheel are evenly distributed, with an average interval of 40 degrees; and are consistent with the radial distribution position of the optical path holes of the 9 channels of the upper optical body sleeve 51; the initial reset position is the theoretical blocking position, and each reset is the blocking position. At this time, no light enters, and the detector measures the main body signal of the optical body 5 at this time. Then rotate the light blocking wheel 20 degrees so that the light hole is concentric with the 9 channels, and the light path enters the detector 515. At this time, the photoelectric signal measured by the 9 channel data is the same as the photoelectric signal generated by the incident light path at this time. The difference between the two is the net photoelectric signal at this time, minus the dryness of the main body signal at this time. The error in data measurement caused by the change of the main body signal is eliminated.

[0039] A light window seat 58 is fixedly mounted on the bottom end of the lower optical body sleeve 52 . A light window glass 57 is embedded in the light window seat 58 . A sealing gasket 56 is provided between the lower optical body sleeve 52 and the light window seat 58 .

[0040] A sealing gasket 56 is arranged between the lower optical body sleeve 52 and the light window seat 58, and a cured seal is formed between the light window seat 58 and the light window glass 57. The light window seat 58 has a stepped hole design, which firstly serves as a positioning guide for the light window glass 57, and a glue injection groove of a certain width and thickness is left at the back to enhance the firmness and reliability of the bonding of the light window glass 57 and increase the sealing performance.

[0041] A wiring hole 518 is defined in the upper optical body sleeve 51 .

[0042] The wiring for the optical body 5 to communicate with the outside is finally concentrated at the wiring hole 518 of the upper optical body sleeve 51. The connection line of the temperature control and data acquisition unit 511 is led to this position, and the line is connected to the plug and the outside; this centralized line outlet method facilitates sealing management. The sealed line outlet at this place is narrow and compact. After the internal lines of the optical body are centrally led out, the place is sealed and glued.

[0043] A thermoelectric cooler protective inner shell 10 is embedded at the top of the outer shell 1. A thermoelectric cooler 9 is arranged inside the thermoelectric cooler protective inner shell 10. A thermoelectric cooler protective outer shell 11 is arranged outside the thermoelectric cooler protective inner shell 10. A rain shield 8 is arranged outside the thermoelectric cooler protective outer shell 11.

[0044] The contact area between the temperature difference refrigerator protective inner shell 10 and the upper surface of the optical body 5 is designed with an axial sealing structure and a sealing member to prevent water and air from penetrating through the hole on the top of the optical body 5 .

[0045] A sealing element 55 is provided between the upper optical body sleeve 51 and the lower optical body sleeve 52 to solve the problem of water leakage and air leakage in the connection.

[0046] There is a heat preservation cotton 6 between the optical body 5 and the housing 1. The heat preservation cotton 6 on the outside of the optical body 5 is heat-insulated from the outside. After being tightly wrapped, it also plays an auxiliary sealing role to a certain extent, and further improves the sealing of the inside of the optical body. The inside is completely isolated from the outside, blocking the exchange of substances.

[0047] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A ground radiometer, characterized in that: The invention comprises an outer shell (1), a dust shield sleeve (2) fixedly mounted on the bottom end of the outer shell (1), a dust shield aperture plate (3) fixedly mounted inside the dust shield sleeve (2), the dust shield aperture plate (3) having nine circumferentially distributed light channel holes, the dust shield aperture plate (3) also having three circumferentially distributed internal threaded seat holes, a locking assembly (7) being arranged inside the internal threaded seat holes, the locking assembly (7) comprising a positioning sleeve seat (73), a tightening block (71) arranged inside the positioning sleeve seat (73), a preload spring (72) arranged inside the positioning sleeve seat (73), a positioning guide shaft (74) being mounted on the upper end of the preload spring (72), the upper end of the positioning guide shaft (74) passing through the outside of the positioning sleeve seat (73); an upper end cover (4) is fixedly connected to the inner wall of the outer shell (1), a concave hole is opened at the bottom of the outer shell (1), and the positioning guide shaft (74) is clamped in the concave hole.

2. A ground radiometer according to claim 1, characterized in that: An optical body (5) is arranged inside the housing (1), and the optical body (5) comprises an upper optical body sleeve (51), a lower optical body sleeve (52) fixedly mounted on the bottom end of the upper optical body sleeve (51), and an optical body upper cover (53) fixedly mounted on the top end of the upper optical body sleeve (51); a light blocking wheel assembly (54) is arranged inside the lower optical body sleeve (52); a stray light diaphragm (521) and a field of view diaphragm (522) are also arranged inside the lower optical body sleeve (52); the stray light diaphragm (521) is located above the field of view diaphragm (522); a temperature control and data acquisition unit (511) is arranged inside the upper optical body sleeve (51); the upper optical body sleeve (51) has a special near-infrared channel, and the special near-infrared channel is connected to the upper optical body sleeve (51); A detector heat sink (513) is provided inside the channel, a detector (515) is fixedly mounted on the detector heat sink (513) via a detector pressure plate (514), a pin of the detector (515) passes through the detector heat sink (513) and is connected to a detector circuit board (512), an aperture diaphragm (517) is provided below the detector (515), a filter (516) is provided below the aperture diaphragm (517), the filter (516) is fixed to the upper optical body sleeve (51) via a filter fixing member (520), an elastic element (519) is provided between the filter (516) and the filter fixing member (520) for protecting the filter (516), and the filter (516) is located above the de-mixing diaphragm (521).

3. The earth radiometer according to claim 1, characterized in that: The light blocking wheel assembly (54) comprises a motor fixing plate (541), a motor (543) fixedly mounted on the bottom of the motor fixing plate (541), and a light blocking wheel (542) fixed to the output end of the motor (543); the light blocking wheel (542) is provided with nine circumferentially distributed through holes (5421); and a Hall switch (59) is arranged inside the upper optical main body sleeve (51).

4. The earth radiometer according to claim 1, characterized in that: A light window seat (58) is fixedly mounted on the bottom end of the lower optical main body sleeve (52), a light window glass (57) is embedded in the light window seat (58), and a sealing gasket (56) is provided between the lower optical main body sleeve (52) and the light window seat (58).

5. The earth radiometer according to claim 1, characterized in that: The upper optical main body sleeve (51) is provided with a wiring hole (518).

6. The earth radiometer according to claim 1, characterized in that: A temperature difference refrigerator protective inner shell (10) is embedded at the top of the outer shell (1), a temperature difference refrigerator (9) is arranged inside the temperature difference refrigerator protective inner shell (10), a temperature difference refrigerator protective outer shell (11) is arranged outside the temperature difference refrigerator protective inner shell (10), and a rain shield (8) is arranged outside the temperature difference refrigerator protective outer shell (11).

7. The earth radiometer according to claim 1, characterized in that: A sealing element (55) is provided between the upper optical body sleeve (51) and the lower optical body sleeve (52).

8. The earth radiometer according to claim 1, characterized in that: Thermal insulation cotton (6) is arranged between the optical body (5) and the outer shell (1).

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