Head-mounted plant leaf detector

Abstract

The invention relates to the technical field of plant detection, in particular to a head-mounted plant leaf detector which comprises a first support and a head-mounted assembly. The head-mounted assembly comprises two detection cameras, a second support, two first fixing blocks, two second fixing blocks, two threaded rods, two rotating handles, a first sliding block, a springback limiting unit, a plurality of elastic bands and a plurality of fixing units, the second fixing blocks are moved by rotating the rotating handles, the distance between the first support and the second support is adjusted, and the distance between the first support and the second support is adjusted; hats or helmets of different sizes can be placed between the first support and the second support, then the first sliding block slides left and right, the position of the elastic band is adjusted, the first sliding block is fixed through the rebound limiting unit, then the elastic band is hung on the fixing unit, after the hat is placed, the elastic band abuts against the upper portion of the hat, and the supporting effect is achieved; therefore, the tent can adapt to caps with different sizes, and even if a farmer wears a canvas cap made of soft materials, the canvas cap can be supported through the elastic belt on the tent.

Description

Technical Field

[0001] The present invention relates to the technical field of plant detection, and in particular to a head-mounted plant leaf detector. Background Art

[0002] In crop planting, farmers are usually required to pay attention to the status of crops at all times, and then judge the needs of crops based on their planting experience, and then perform watering, fertilizing or pest control operations. However, this method requires farmers to have excellent planting experience and the planting difficulty is relatively high. If farmers lack experience, they are prone to misjudgment and cause crop losses.

[0003] In the prior art, in order to help farmers better understand the condition of crops, a head-mounted monitoring device is designed. The monitoring camera is installed on a bracket and then installed on the farmer's hat or helmet to replace manual scanning of plant leaves, thereby facilitating the judgment of the plant's condition.

[0004] However, in the aforementioned prior art, if a canvas hat or straw hat made of a softer material is used, it cannot provide good support for the camera, which will lead to insufficient stability of the monitoring camera. In addition, there are many types of hats on the market, and it is impossible to stably install it on different hats, so it is very inconvenient to use. Summary of the invention

[0005] The purpose of the present invention is to provide a head-mounted plant leaf detector, which solves the problem in the prior art that if a canvas hat or straw hat with a softer material is used, it cannot provide good support for the camera, which will lead to insufficient stability of the monitoring camera, and there are many types of hats on the market, and it cannot be stably installed on different hats, so it is very inconvenient to use.

[0006] To achieve the above-mentioned object, the present invention provides a head-mounted plant leaf detector, comprising a first bracket and a head-mounted component;

[0007] The head-mounted assembly includes two detection cameras, a second bracket, two first fixed blocks, two second fixed blocks, two threaded rods, two handlebars, a first slider, a rebound limiting unit, a plurality of elastic bands and a plurality of fixing units. The two detection cameras are fixedly connected to the first bracket and are sequentially distributed on one side of the first bracket. The second bracket is placed on the other side of the first bracket. The two first fixed blocks are fixedly connected to the first bracket and are symmetrically distributed at both ends of the first bracket. The two second fixed blocks are fixedly connected to the second bracket and are symmetrically distributed at both ends of the second bracket. The two second fixed blocks have a first threaded hole. The two threaded rods are respectively adapted to the corresponding threaded holes. One end of the two threaded rods is rotatably connected to the first fixed block. The other ends of the two threaded rods are respectively fixedly connected to the corresponding handlebars. The first bracket has a first slide. The first slider is slidably connected to the first slide. The rebound limiting unit is arranged on the first bracket. One end of the plurality of elastic bands is fixedly connected to the first slider and is sequentially distributed above the first slider. The other ends of the plurality of elastic bands are respectively connected to the second bracket through the corresponding fixing units.

[0008] Among them, the head-mounted assembly also includes two lighting lamps, a first soft pad and a second soft pad. The two lighting lamps are fixedly connected to the first bracket and are respectively located on one side of the corresponding detection camera. The first soft pad is fixedly connected to the first bracket and is located on the other side of the first bracket. The second soft pad is fixedly connected to the second bracket and is located on one side of the second bracket.

[0009] Among them, the rebound limit unit includes a handle, a limit rod and a spring, the first slider has a plurality of limit holes, one end of the limit rod is fixedly connected to the handle, the other end of the limit rod is located inside the corresponding limit hole, the limit rod is adapted to any of the limit holes, the two ends of the spring are respectively movably connected to the handle and the first bracket, and the spring is sleeved on the outside of the limit rod.

[0010] Wherein, the fixing unit includes a limiting ring and a hook, the limiting ring is fixedly connected to the end of the elastic band away from the first slider, the hook is fixedly connected to the second bracket and is located above the second bracket, and the limiting ring and the hook are adapted to each other.

[0011] Wherein, the head-mounted plant leaf detector also includes an adjustment component, and the adjustment component is respectively arranged on the two second fixing blocks.

[0012] Among them, the adjustment component includes a support plate, multiple limit rings and two locking units. The multiple limit rings are fixedly connected to the support plate and are distributed in sequence below the support plate. Each limit ring is sleeved on the outside of the corresponding elastic band, and the two locking units are symmetrically arranged at both ends of the support plate.

[0013] In which, the locking unit includes a fixed plate, a second sliding groove, a second slider, a bolt and a rotating block, the fixed plate is fixedly connected to the second fixed block and is located at one end of the second fixed block, the second sliding groove is fixedly connected to the fixed plate and is located above the fixed plate, the second slider is slidably connected to the second sliding groove, the second sliding groove has a slot, the second slider has a second threaded hole, the bolt and the second threaded hole are adapted to each other, the bolt is slidably connected to the slot, and the rotating block is fixedly connected to one end of the bolt.

[0014] The head-mounted plant leaf detector of the present invention drives the threaded rod to rotate by rotating the handle, moves the second fixed block, adjusts the distance between the first bracket and the second bracket, and allows hats or helmets of different sizes to be placed between the first bracket and the second bracket. Then, the first slider is slid left and right to adjust the position of the elastic band. The first slider is fixed by the rebound limit unit, and then the elastic band is hung on the fixing unit. After the hat is placed, the elastic band resists the upper part of the hat to play a supporting role. Through the above-mentioned structural setting, hats of different sizes can be adapted. At the same time, relying on the clamping effect, even if the farmer wears a canvas hat with a softer material, the elastic band on the upper side can be supported to prevent the head-mounted plant leaf detector from slipping, which can greatly improve the stability after wearing it. At the same time, it is more convenient for farmers to carry and use it outside. The growth status of crops is photographed in real time by the detection camera, and the collected data is analyzed and processed in real time by using the MobilleNet_SSD algorithm. The shooting range can be expanded by two detection cameras, and the growth information of crops can be captured more effectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0016] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the present invention.

[0017] Figure 2 It is an overall cross-sectional view of the first embodiment of the present invention.

[0018] Figure 3 The present invention Figure 2 AA line section view.

[0019] Figure 4 The present invention Figure 2 BB line cross-sectional view.

[0020] Figure 5 It is a schematic diagram of the overall structure of the second embodiment of the present invention.

[0021] Figure 6 It is an overall cross-sectional view of a second embodiment of the present invention.

[0022] Figure 7 The present invention Figure 6 CC line section view.

[0023] Figure 8 It is a schematic diagram of the overall structure of the third embodiment of the present invention.

[0024] Fig. 9 It is an overall cross-sectional view of a third embodiment of the present invention.

[0025] Fig.10 The present invention Fig. 9 Enlarged view of the local structure at D.

[0026] 101-first bracket, 102-detection camera, 103-second bracket, 104-first fixing block, 105-second fixing block, 106-threaded rod, 107-turn handle, 108-first slider, 109-first threaded hole, 110-first slide groove, 111-lighting lamp, 112-first cushion, 113-second cushion, 114-handle, 115-limiting rod, 116-spring, 117- Limiting hole, 118-limiting ring, 119-hook, 120-elastic band, 201-support plate, 202-limiting ring, 203-fixing plate, 204-second slide groove, 205-second slider, 206-bolt, 207-rotating block, 208-slot, 209-second threaded hole, 301-protective cover, 302-housing, 303-battery, 304-motor, 305-cleaning brush, 306-switch. DETAILED DESCRIPTION

[0027] Embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0028] First embodiment:

[0029] See also Figures 1 to 4 ,in Figure 1 is a schematic diagram of the overall structure of the first embodiment of the present invention, Figure 2 is a cross-sectional view of the entire first embodiment of the present invention, Figure 3 The present invention Figure 2 AA line section view, Figure 4 The present invention Figure 2 BB line cross-sectional view. The present invention provides a head-mounted plant leaf detector, comprising a first bracket 101 and a head-mounted component, wherein the head-mounted component comprises two detection cameras 102, a second bracket 103, two first fixing blocks 104, two second fixing blocks 105, two threaded rods 106, two turning handles 107, a first slider 108, a rebound limiting unit, a plurality of elastic bands 120, a plurality of fixing units, two lighting lamps 111, a first soft pad 112 and a second soft pad 113, wherein the two second fixing blocks 105 each have a first threaded hole 109, the first bracket 101 has a first slide groove 110, the rebound limiting unit comprises a handle 114, a limiting rod 115 and a spring 116, the first slider 108 has a plurality of limiting holes 117, and the fixing unit comprises a limiting ring 118 and a hook 119.

[0030] According to this specific embodiment, by rotating the turning handle 107, the threaded rod 106 is driven to rotate, so that the second fixing block 105 moves, and the distance between the first bracket 101 and the second bracket 103 is adjusted, so that hats or helmets of different sizes can be placed between the first bracket 101 and the second bracket 103, and then the first slider 108 is slid left and right to adjust the position of the elastic band 120, and by holding the handle 114, the limiting rod 115 is pulled out of the limiting hole 117, and then the first slider 108 slides in the first sliding groove 110 to adjust the position of the adapted hat left and right, and then the handle 114 is released, and the spring 116 rebounds, driving the limiting rod 115 to enter the limiting hole 117 to complete the limiting fixation, and then the limiting ring 118 is sleeved on the hook 119, and at the same time the elastic band 120 is contracted so that it will not loosen, and multiple elastic bands 120 are located between the first bracket 101 and the second bracket 103 to form a support area.

[0031] Among them, the two detection cameras 102 are fixedly connected to the first bracket 101 and are distributed in sequence on one side of the first bracket 101, the second bracket 103 is placed on the other side of the first bracket 101, the two first fixing blocks 104 are fixedly connected to the first bracket 101 and are symmetrically distributed at both ends of the first bracket 101, the two second fixing blocks 105 are fixedly connected to the second bracket 103 and are symmetrically distributed at both ends of the second bracket 103, the two second fixing blocks 105 have a first threaded hole 109, the two threaded rods 106 are respectively adapted to the corresponding threaded holes, one end of the two threaded rods 106 are rotatably connected to the first fixing block 104, the other ends of the two threaded rods 106 are respectively fixedly connected to the corresponding turning handles 107, the first bracket 101 has a first slide groove 110, the first slider 108 is slidably connected to the first slide groove 110, and the rebound limiting unit is arranged on the first bracket 101. One ends of the multiple elastic bands 120 are fixedly connected to the first slider 108 and are sequentially distributed above the first slider 108 , and the other ends of the multiple elastic bands 120 are respectively connected to the second bracket 103 through the corresponding fixing units. By rotating the turning handle 107, the threaded rod 106 is driven to rotate, so that the second fixing block 105 moves, and the distance between the first bracket 101 and the second bracket 103 is adjusted, so that hats or helmets of different sizes can be placed between the first bracket 101 and the second bracket 103, and then the first slider 108 is slid left and right to adjust the position of the elastic band 120, and the first slider 108 is fixed by the rebound limit unit, and then the elastic band 120 is hung on the fixing unit. After the hat is placed, the elastic band 120 resists the top of the hat to play a supporting role, thereby adapting to hats of different sizes. At the same time, relying on the clamping effect, even if the farmer wears a canvas hat made of softer material, it can be supported by the elastic band 120 above to prevent the head-mounted plant leaf detector from slipping, which can greatly improve the stability after wearing.

[0032] Secondly, the two lighting lamps 111 are fixedly connected to the first bracket 101 and are respectively located on one side of the corresponding detection camera 102. The first soft pad 112 is fixedly connected to the first bracket 101 and is located on the other side of the first bracket 101. The second soft pad 113 is fixedly connected to the second bracket 103 and is located on one side of the second bracket 103. The lighting lamp 111 illuminates the detection area to improve the detection accuracy and also facilitate the observation of farmers. The first soft pad 112 and the second soft pad 113 can prevent the first bracket 101 and the second bracket 103 from being worn by the hard object of the helmet clamped. If the clamped object is a canvas hat with a softer material, the comfort can also be improved.

[0033] Meanwhile, the first slider 108 has a plurality of limiting holes 117, one end of the limiting rod 115 is fixedly connected to the handle 114, the other end of the limiting rod 115 is located inside the corresponding limiting hole 117, the limiting rod 115 is adapted to any of the limiting holes 117, the two ends of the spring 116 are movably connected to the handle 114 and the first bracket 101, respectively, and the spring 116 is sleeved on the outside of the limiting rod 115. Holding the handle 114, pulling the limiting rod 115 out of the limiting hole 117, and then the first slider 108 slides in the first slide slot 110 to adjust the position of the hat to the left and right, and then releasing the handle 114, the spring 116 rebounds, driving the limiting rod 115 to enter the limiting hole 117, and completing the limiting fixation.

[0034] In addition, the limiting ring 118 is fixedly connected to one end of the elastic band 120 away from the first slider 108, the hook 119 is fixedly connected to the second bracket 103 and is located above the second bracket 103, and the limiting ring 118 and the hook 119 are adapted to each other. The limiting ring 118 is sleeved on the hook 119, and the elastic band 120 is contracted so as not to loosen. A plurality of the elastic bands 120 are located between the first bracket 101 and the second bracket 103 to form a support area to prevent the first bracket 101 and the second bracket 103 from sliding down after clamping.

[0035] When using a head-mounted plant leaf detector of the present embodiment, the threaded rod 106 is driven to rotate by rotating the turning handle 107, and cooperates with the first threaded hole 109 to move the second fixing block 105, and adjust the distance between the first bracket 101 and the second bracket 103, so that hats or helmets of different sizes can be placed between the first bracket 101 and the second bracket 103, and then the first slider 108 is slid left and right to adjust the position of the elastic band 120, and the limit rod 115 is pulled out of the limit hole 117 by holding the handle 114, and then the first slider 108 slides in the first slide groove 110 to adjust the position of the hat to fit left and right, and then the handle 114 is released, and the spring 116 rebounds, driving the limit rod 115 to enter the limit hole 117, completing the limit fixation, and then the limit ring 118 is sleeved on the hook 119, and at the same time, the elastic band 120 The first and second brackets 101 and 103 are arranged between the first bracket 101 and the second bracket 103 to form a support area to prevent the first bracket 101 and the second bracket 103 from sliding down after clamping. After the hat is placed, the elastic band 120 supports the top of the hat to play a supporting role. In addition, the lighting lamp 111 illuminates the detection area to improve the detection accuracy and facilitate farmers' observation. The first soft pad 112 and the second soft pad 113 can prevent the first bracket 101 and the second bracket 103 from wearing against the hard object of the clamped helmet. If the clamped object is a canvas hat with a softer material, the comfort can also be improved. Through the above-mentioned structural setting, hats of different sizes can be adapted. At the same time, relying on the clamping effect, even if the farmer wears a canvas hat with a softer material, it can be supported by the elastic band 120 above to prevent the head-mounted plant leaf detector from slipping, which can greatly improve the stability after wearing.

[0036] Second embodiment:

[0037] Based on the first embodiment, please refer to Figures 5 to 7 ,in Figure 5 is a schematic diagram of the overall structure of the second embodiment of the present invention, Figure 6 is a cross-sectional view of the entire second embodiment of the present invention, Figure 7 The present invention Figure 6 The present invention provides a head-mounted plant leaf detector, further comprising an adjustment component, the adjustment component comprising a support plate 201, a plurality of limit rings 202 and two locking units, the locking units comprising a fixing plate 203, a second slide groove 204, a second slider 205, a bolt 206 and a rotating block 207.

[0038] According to this specific embodiment, the limiting ring 202 limits the elastic band 120, which is then supported by the support plate 201, and then the second slider 205 slides up and down in the second slide groove 204, driving the bolt 206 to slide in the slot 208. After adjusting to a position suitable for a hat or a helmet, the rotating block 207 is rotated to drive the bolt 206 to rotate, and the bolt 206 is screwed into the second threaded hole 209. At the same time, the rotating block 207 is abutted against the second slide groove 204, completing the position locking of the second slider 205 and the support plate 201.

[0039] The adjustment components are respectively arranged on the two second fixing blocks 105. The adjustment components can stretch the plurality of elastic bands 120 upwards to adjust the placement area of ​​the hat or helmet, so as to better fit different hats or helmets, so that the hat or helmet can be better placed between the first bracket 101 and the second bracket 103.

[0040] Secondly, the plurality of limiting rings 202 are fixedly connected to the support plate 201 and are sequentially distributed below the support plate 201. Each limiting ring 202 is sleeved on the outside of the corresponding elastic band 120, and the two locking units are symmetrically arranged at both ends of the support plate 201. The limiting ring 202 limits the elastic band 120 and then supports it through the support plate 201. The height of the elastic band 120 can be moved up and down by adjusting the two locking units.

[0041] At the same time, the fixed plate 203 is fixedly connected to the second fixed block 105 and is located at one end of the second fixed block 105, the second slide groove 204 is fixedly connected to the fixed plate 203 and is located above the fixed plate 203, the second slider 205 is slidably connected to the second slide groove 204, the second slide groove 204 has a slot 208, the second slider 205 has a second threaded hole 209, the bolt 206 and the second threaded hole 209 are adapted to each other, the bolt 206 is slidably connected to the slot 208, and the rotating block 207 is fixedly connected to one end of the bolt 206. The fixed plate 203 supports the second slide groove 204, and the second slider 205 slides up and down in the second slide groove 204, driving the bolt 206 to slide in the slot 208, and then the rotating block 207 is rotated to drive the bolt 206 to rotate, and the bolt 206 is screwed into the second threaded hole 209. At the same time, the rotating block 207 is abutted against the second slide groove 204, completing the position locking of the second slider 205 and the support plate 201.

[0042] When using a head-mounted plant leaf detector of this embodiment, the limiting ring 202 limits the elastic band 120, and then supports it through the support plate 201, and then the second slider 205 slides up and down in the second slide groove 204, driving the bolt 206 to slide in the slot 208. After adjusting to a position suitable for a hat or a helmet, the rotating block 207 is rotated to drive the bolt 206 to rotate, and the bolt 206 is screwed into the second threaded hole 209. At the same time, the rotating block 207 is abutted against the second slide groove 204 to complete the position locking of the second slider 205 and the support plate 201. Through the above-mentioned structural setting, multiple elastic bands 120 are stretched upward to adjust the placement area of ​​the hat or helmet, so as to better adapt to different hats or helmets, so that the hat or helmet can be better placed between the first bracket 101 and the second bracket 103.

[0043] Third embodiment:

[0044] The head-mounted plant leaf detector also includes two cleaning components, which are respectively arranged on the corresponding detection camera 102. The cleaning component includes a protective cover 301, a shell 302, a battery 303, a motor 304 and a cleaning brush 305. The protective cover 301 is sleeved on the outside of the detection camera 102, the shell 302 is fixedly connected to the protective cover 301 and is located above the protective cover 301, the battery 303 and the motor 304 are both arranged inside the shell 302, the battery 303 is connected to the motor 304, the output end of the motor 304 passes through the shell 302, and is fixedly connected to the cleaning brush 305, and the cleaning brush 305 is fitted with the protective cover 301. The cleaning component also includes a switch 306, which is fixedly connected to the shell 302 and is located above the shell 302, and the switch 306 is electrically connected to the motor 304.

[0045] Based on the second embodiment, please refer to Figures 8 to 10 ,in Figure 8 is a schematic diagram of the overall structure of the third embodiment of the present invention, Fig. 9 is a cross-sectional view of the entire third embodiment of the present invention, Fig.10 The present invention Fig. 9 The present invention provides a head-mounted plant leaf detector, which also includes two cleaning components. The cleaning components include a protective cover 301, a housing 302, a battery 303, a motor 304, a cleaning brush 305 and a switch 306.

[0046] According to this specific embodiment, pressing the switch 306 can control the operation or stop of the motor 304, the protective cover 301 protects the detection camera 102, the shell 302 protects the battery 303 and the motor 304, the battery 303 provides power to the motor 304, and the motor 304 starts to drive the cleaning brush 305 to rotate back and forth, thereby scraping off the dust and rainwater on the protective cover 301.

[0047] The two cleaning components are respectively arranged on the corresponding detection cameras 102. The cleaning components can clean the detection cameras 102 to avoid dust or rain that may cause unclear shooting.

[0048] Secondly, the protective cover 301 is sleeved on the outside of the detection camera 102, the housing 302 is fixedly connected to the protective cover 301 and is located above the protective cover 301, the battery 303 and the motor 304 are both arranged inside the housing 302, the battery 303 is connected to the motor 304, the output end of the motor 304 passes through the housing 302 and is fixedly connected to the cleaning brush 305, and the cleaning brush 305 is fitted with the protective cover 301. The protective cover 301 protects the detection camera 102, the housing 302 protects the battery 303 and the motor 304, the battery 303 provides power to the motor 304, the motor 304 is started, and drives the cleaning brush 305 to rotate back and forth, thereby scraping off the dust and rain on the protective cover 301.

[0049] Meanwhile, the switch 306 is fixedly connected to the housing 302 and is located above the housing 302. The switch 306 is electrically connected to the motor 304. Pressing the switch 306 can control the operation or stop of the motor 304.

[0050] When using a head-mounted plant leaf detector of the present embodiment, pressing the switch 306 can control the operation or stop of the motor 304, the protective cover 301 protects the detection camera 102, the shell 302 protects the battery 303 and the motor 304, the battery 303 provides power to the motor 304, and the motor 304 starts to drive the cleaning brush 305 to rotate back and forth, thereby scraping off the dust and rain on the protective cover 301. Through the above-mentioned structural setting, the detection camera 102 is cleaned to avoid being contaminated by dust or rain and causing unclear shooting.

[0051] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A head-mounted plant leaf detector, comprising a first bracket, characterized in that: Also included is a head-mounted assembly; The head-mounted assembly includes two detection cameras, a second bracket, two first fixed blocks, two second fixed blocks, two threaded rods, two handlebars, a first slider, a rebound limiting unit, a plurality of elastic bands and a plurality of fixing units. The two detection cameras are fixedly connected to the first bracket and are sequentially distributed on one side of the first bracket. The second bracket is placed on the other side of the first bracket. The two first fixed blocks are fixedly connected to the first bracket and are symmetrically distributed at both ends of the first bracket. The two second fixed blocks are fixedly connected to the second bracket and are symmetrically distributed at both ends of the second bracket. The two second fixed blocks have a first threaded hole. The two threaded rods are respectively adapted to the corresponding threaded holes. One end of the two threaded rods is rotatably connected to the first fixed block. The other ends of the two threaded rods are respectively fixedly connected to the corresponding handlebars. The first bracket has a first slide. The first slider is slidably connected to the first slide. The rebound limiting unit is arranged on the first bracket. One end of the plurality of elastic bands is fixedly connected to the first slider and is sequentially distributed above the first slider. The other ends of the plurality of elastic bands are respectively connected to the second bracket through the corresponding fixing units.

2. The head-mounted plant leaf detector as claimed in claim 1, characterized in that: The head-mounted assembly also includes two lighting lamps, a first soft pad and a second soft pad. The two lighting lamps are fixedly connected to the first bracket and are respectively located on one side of the corresponding detection camera. The first soft pad is fixedly connected to the first bracket and is located on the other side of the first bracket. The second soft pad is fixedly connected to the second bracket and is located on one side of the second bracket.

3. The head-mounted plant leaf detector as claimed in claim 2, characterized in that: The rebound limit unit includes a handle, a limit rod and a spring. The first slider has a plurality of limit holes. One end of the limit rod is fixedly connected to the handle, and the other end of the limit rod is located inside the corresponding limit hole. The limit rod is mutually adapted to any of the limit holes. Both ends of the spring are respectively movably connected to the handle and the first bracket, and the spring is sleeved on the outside of the limit rod.

4. The head-mounted plant leaf detector as claimed in claim 3, characterized in that: The fixing unit includes a limiting ring and a hook. The limiting ring is fixedly connected to an end of the elastic band away from the first slider. The hook is fixedly connected to the second bracket and is located above the second bracket. The limiting ring and the hook are adapted to each other.

5. The head-mounted plant leaf detector as claimed in claim 4, characterized in that: The head-mounted plant leaf detector also includes an adjustment component, which is respectively arranged on the two second fixing blocks.

6. The head-mounted plant leaf detector as claimed in claim 5, characterized in that: The adjustment assembly includes a support plate, multiple limiting rings and two locking units. The multiple limiting rings are fixedly connected to the support plate and are distributed in sequence below the support plate. Each limiting ring is sleeved on the outside of the corresponding elastic band, and the two locking units are symmetrically arranged at both ends of the support plate.

7. The head-mounted plant leaf detector as claimed in claim 6, characterized in that: The locking unit includes a fixed plate, a second sliding groove, a second slider, a bolt and a rotating block, the fixed plate is fixedly connected to the second fixed block and is located at one end of the second fixed block, the second sliding groove is fixedly connected to the fixed plate and is located above the fixed plate, the second slider is slidably connected to the second sliding groove, the second sliding groove has a slot, the second slider has a second threaded hole, the bolt and the second threaded hole are adapted to each other, the bolt is slidably connected to the slot, and the rotating block is fixedly connected to one end of the bolt.

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