A height measuring device

Abstract

This utility model relates to a height measuring device, comprising: a telescopic pole with graduations on its outer surface; a video acquisition unit comprising: a video mounting bracket, vertically mounted on the top of the telescopic pole; a camera, the lens of which is disposed on the side wall of the video mounting bracket facing outward; the video image captured by the camera displaying a positioning reference mark; a first main control chip, disposed within the video mounting bracket, for processing the image data acquired by the camera and sending the processed video data to a WiFi antenna; a WiFi antenna, disposed within the video mounting bracket, for transmitting the received video data; and a battery, disposed within the video mounting bracket, for powering the camera, the first main control chip, and the WiFi antenna. This utility model's height measuring device has the advantage of accurately measuring the height of trees with dense foliage.

Description

Technical Field

[0001] This utility model relates to the field of measuring equipment technology, and in particular to a height measuring device. Background Technology

[0002] Existing height measurement equipment typically uses ultrasonic technology. When measuring the height of a tree, the ultrasonic height measurement equipment emits a beam of ultrasonic waves towards the top of the tree and receives the ultrasonic waves reflected back from the top of the tree. By calculating the time difference between the emission and reception of the ultrasonic waves, the height of the tree can be obtained.

[0003] However, in dense and tall forests, ultrasound waves encounter a large number of leaves, which absorb the energy and greatly reduce its power. Furthermore, the scattering caused by the leaves can interfere with the detection, making it impossible to obtain truly accurate data results. Utility Model Content

[0004] Therefore, the purpose of this utility model is to improve the accuracy of tree height detection in dense forests and to provide a height measurement device.

[0005] A height measuring device includes: a telescopic pole with graduations on its outer surface; a video acquisition unit including: a video mounting bracket vertically mounted on the top of the telescopic pole; a camera with its lens facing outward and disposed on the side wall of the video mounting bracket; a positioning reference mark displayed in the video image captured by the camera; a first main control chip disposed within the video mounting bracket for processing the image data acquired by the camera and sending the processed video data to a WiFi antenna; a WiFi antenna disposed within the video mounting bracket for transmitting the received video data; and a battery disposed within the video mounting bracket for powering the camera, the first main control chip, and the WiFi antenna.

[0006] Compared to existing technologies, the height measuring device of this invention can measure height close to the top of the tree by extending a telescopic rod, avoiding obstruction by dense foliage. Simultaneously, the video captured by the video acquisition device, with crosshairs, accurately locates the treetop, achieving high-precision tree height measurement. Furthermore, this application improves the stability of the measurement process and further enhances measurement accuracy by adjusting the structure of the video acquisition device to be installed along the extension direction of the telescopic rod and adjusting its center of gravity.

[0007] Furthermore, the telescopic rod includes a first rod at the bottom and an nth rod at the top, and also includes (n-2) intermediate rods connecting the first rod and the nth rod, where n is a positive integer not less than 2; the bottom of the first rod has a scale start line, and the scale of the first rod gradually increases from bottom to top; the scale at the top of the nth rod coincides with the maximum scale on the first rod, and the scale of the nth rod gradually increases from top to bottom; starting from the nth rod, except for the first rod, the scales on the other rods gradually increase from top to bottom, and the maximum scale value at the bottom of the previous rod is aligned with the minimum scale value at the top of the next rod.

[0008] Furthermore, a level is provided, which is mounted on the first or nth branch of the telescopic rod.

[0009] Furthermore, the video mounting bracket includes a housing, a tail cover, and a top cover; the housing is cylindrical; the top surface of the housing is provided with a circuit module mounting slot for mounting the first main control chip; the bottom surface of the housing is provided with a battery mounting slot; the bottom surface of the tail cover is provided with a collector mounting slot, the diameter of which is the same as the outer diameter of the top of the telescopic rod; the tail cover is fixed to the bottom surface of the housing, fixing the battery in the battery mounting slot of the housing; the top cover is provided at the opening of the circuit module mounting slot.

[0010] Furthermore, the video capture device also includes a switch, a first step-down module, a second step-down module, and a first main control chip; both the first and second step-down modules are connected to the battery through the switch to obtain the battery voltage and step down the obtained voltage; the power supply terminal of the camera is connected to the second step-down module to obtain the power supply voltage and outputs the captured video image at its video output terminal; the first main control chip has a power input terminal, a video input terminal, and a video signal output terminal, its power input terminal is connected to the first step-down module to obtain the power supply voltage; its video input terminal is connected to the video output terminal of the camera to acquire the video image; the video signal output terminal is connected to the antenna through a coaxial cable, and the main control chip converts the video image into wireless video data and outputs it to the antenna for wireless transmission.

[0011] Furthermore, the switch is a self-resetting push-button switch; it rebounds after being pressed for a period of time; the first main control chip also has a control output terminal; the video capture device also includes an N-MOS transistor; the gate of the N-MOS transistor is connected to the battery through the self-resetting push-button switch, its source is directly connected to the battery, and its drain is connected to the first buck module and the second buck module; the control output terminal of the first main control chip is connected to the gate of the N-MOS transistor; or, the video capture device also includes a P-MOS transistor; the gate of the P-MOS transistor is connected to the battery through the self-resetting push-button switch, its drain is directly connected to the battery, and its source is connected to the first buck module and the second buck module; the control output terminal of the first main control chip is connected to the gate of the P-MOS transistor. The self-resetting switch allows the user to turn off the video capture device at the terminal.

[0012] Furthermore, it also includes an AP repeater, which receives the WIFI video data wirelessly transmitted by the video capture device and retransmits it outward as a WIFI signal. The AP repeater increases the transmission distance of the WIFI video data, improving transmission stability and real-time performance.

[0013] Furthermore, the AP repeater includes an AP battery, a gain antenna, and an AP circuit module; the gain antenna can simultaneously receive and transmit WIFI signals; the AP circuit module includes an N-MOS transistor and a second main control chip; the gate of the N-MOS transistor is connected to the battery via a self-resetting push-button switch, its source is directly connected to the battery, and its drain is stepped down by an AP buck module to reduce the output voltage; or, the AP circuit module includes a P-MOS transistor and a second main control chip; the gate of the P-MOS transistor is connected to the AP battery via a self-resetting push-button switch, its drain is directly connected to the battery, and its source is stepped down by an AP buck module to reduce the output voltage; the second main control chip has a power supply input terminal, a control output terminal, a WIFI video signal input terminal, and a WIFI video signal output terminal; the power supply input terminal is connected to the AP buck module, the control output terminal is connected to the gate of the N-MOS transistor or P-MOS transistor, and the WIFI video data input terminal and WIFI video data output terminal are connected to the gain antenna, transmitting the WIFI video data received by the gain antenna again through the gain antenna.

[0014] Furthermore, the AP repeater also includes an AP housing, an AP tail cover, and an AP top cover; the top surface of the housing has an AP circuit module mounting slot, and the bottom surface has an AP battery mounting slot; the diameter of the AP circuit module mounting slot is slightly larger than that of the AP battery mounting slot; the top surface of the AP tail cover has an AP battery fixing slot, and the bottom surface has a collector fixing slot; the AP tail cover is fixed to the bottom surface of the AP housing, and fixes the AP battery in the AP battery mounting slot and the AP battery fixing slot. The AP top cover covers the opening of the AP circuit module mounting slot.

[0015] Furthermore, the video acquisition device also includes an altimeter; the first main control chip is also provided with an altitude data input terminal, which is connected to the data output terminal of the altimeter to receive altitude data, convert the altitude data into WIFI altitude information and output it to the antenna.

[0016] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the height measuring equipment.

[0018] Figure 2 This is a schematic diagram of the structure of the telescopic rod 1;

[0019] Figure 3 This is a schematic diagram of the structure of the buckle 12;

[0020] Figure 4 This is a structural diagram showing the wrench 124 in the unlocked state;

[0021] Figure 5 This is a structural diagram showing the wrench 124 in the locked state;

[0022] Figure 6 This is a schematic diagram of the overall structure of the video capture device 2;

[0023] Figure 7 This is a structural diagram of the circuit module 25;

[0024] Figure 8 This is a schematic diagram of the overall structure of the AP repeater 3.

[0025] Figure 9 This is a structural diagram of the AP circuit module 34;

[0026] The components include: 1. Telescopic pole; 11. Pole body; 11a. First pole body; 11b. Second pole body; 11c. Third pole body; 12. Buckle; 121. Sleeve; 121a. First fixing protrusion; 121b. Second fixing protrusion; 122. Screw; 123. Shaft; 124. Wrench; 2. Video capture device; 21. Video mounting bracket; 211. Housing; 212. Tail cover; 213. Top cover; 22. Battery; 23. Camera; 24. Antenna; 25. Circuit module; 26. Altimeter; 3. AP repeater; 31. AP mounting bracket; 311. AP housing; 312. AP tail cover; 313. AP top cover; 32. AP battery; 33. Gain antenna; 34. AP circuit module. Detailed Implementation

[0027] This invention redesigns the height measuring device by combining a telescopic pole and a camera. The top of the telescopic pole is aligned with the treetop based on the crosshair in the video image, and the scale on the telescopic pole is read at this time, enabling the measurement of tree height in dense forests. The video acquisition device with the camera is installed vertically on the telescopic pole to optimize the balance during measurement and improve the accuracy of the measurement.

[0028] Please see Figure 1 , Figure 1 This is a schematic diagram of the height measurement device. The height measurement device of this utility model includes a telescopic pole 1, a video acquisition device 2, and an AP repeater 3. The video acquisition device 2 is located at the top of the telescopic pole 1, and the AP repeater 3 is located at the bottom of the telescopic pole 1.

[0029] For details, please refer to Figure 2 , Figure 2 This is a schematic diagram of the telescopic rod 1. The telescopic rod 1 includes n hollow rod sections with gradually decreasing diameters 11, and n buckles 12 fixed to the rod sections 11, where n is a positive integer not less than 2.

[0030] Each section of the rod 11 is divided into a first rod 11a located at the bottom of the telescopic rod 1, an nth rod located at the top, and a second rod 11b to an (n-1)th rod located between the first rod 11a and the nth rod as intermediate rods. The first rod 11a has the largest diameter, and its outer surface has graduations that gradually increase in value from its bottom to its top, with the maximum value being the same as its length. The outer surface of the telescopic rod 1 from the top of the nth rod to the bottom of the second rod 11b also has graduations that gradually increase in value.

[0031] The first rod 11a and the second rod 11b with the second largest diameter are taken as the first set of outer and inner rods. The second rod 11b is placed inside the first rod 11a as the inner rod. Then, the second rod 11b and the third rod 11c with the third largest diameter are used to form the second set of outer and inner rods, and the remaining rod sections 11 are installed in sequence. Each assembled rod section 11 can move up and down; and in a set of outer and inner rods, when the inner rod is stretched to its limit, the maximum scale at the bottom of the inner rod surface coincides with the top of the outer rod and connects with the scale at the top of the outer rod; the value of the scale gradually increases from the top of the nth rod to the bottom of the first rod 11a. The starting value of the scale at the top of the nth rod is the height of the nth rod extending beyond the first rod 11a when the telescopic rod 1 is retracted and folded. The maximum value of the scale at the bottom of the second rod 11b is the sum of the maximum length that the second rod 11b can extend to the top of the nth rod and the starting value.

[0032] Please see Figure 3 , Figure 3 This is a schematic diagram of the structure of the buckle 12. The buckle 12 includes a sleeve 121 and a screw 122.

[0033] The sleeve 121 extends vertically to accommodate the telescopic rod. It has a vertical opening on its side, and three sets of fixing units are arranged along the opening. Each set of fixing units includes a first fixing protrusion 121a and a second fixing protrusion 121b horizontally opposite each other on both sides of the opening. The second fixing protrusion 121b has a threaded hole. The lower part of the sleeve 121 has two sets of fixing units, and the upper part of the sleeve 121 has one set of fixing units. The sleeve 121 has horizontal grooves on both sides of the opening between each set of fixing units. The diameter of the sleeve 121 at each set of fixing units can be adjusted individually. Each sleeve 121 is fitted onto the connection of two rod sections 11 that make up a set of outer and inner rods via a gasket; in the outer and inner rods composed of the first rod section 11a and the second rod section 11b, the lower part of the sleeve 121 is fitted onto the top of the first rod section 11a, which is the outer rod, and the upper part of the sleeve 121 is fitted onto the bottom of the second rod section 11b, which is the inner rod.

[0034] The screw 122 has a threaded end and a circular base at its fixed end. The threaded end passes sequentially through the threaded holes of the first fixed protrusion 121a and the second fixed protrusion 121b in a set of fixed units. The circular base at its fixed end is embedded in the first fixed protrusion 121a, preventing the screw 122 from coming out of the second fixed protrusion 121b. The threaded end is engaged and fixed with the thread in the threaded hole of the second fixed protrusion 121b. There are three screws 122, which are respectively set on the three fixed units. When the screw 122 is rotated in the forward direction, the thread on the screw 122 causes the second fixed protrusion 121b and the first fixed protrusion 121a that are engaged with it to move closer to each other, reducing the opening at that point and thus changing the diameter of the sleeve 121 at that fixed unit. The threaded end of the screw 122 located on the upper part of the sleeve 121 is also provided with a rotating shaft 123 arranged radially to the sleeve 121, and a wrench 124 with one end fixed to the rotating shaft 123. The rotating shaft 123 has two rotational directions: one is rotation along its own axial direction, and the other is radial rotation following the rotation of the screw 122. The wrench 124 can rotate axially with the rotating shaft 123 to a locked state where it is tightly against the screw 122 on the upper part of the sleeve 121, or to an unlocked state with the screw 122. When in the unlocked state, the wrench 124 can rotate around the rotating shaft 123, thereby driving the screw 122 to rotate axially and adjust the diameter of the upper part of the sleeve 121. When in the unlocked state, the wrench 124 cannot rotate around the rotating shaft 123.

[0035] Please see Figures 4-5 , Figure 4 This is a structural diagram showing the wrench 124 in the unlocked state. Figure 5 This is a structural diagram showing the wrench 124 in the locked state.

[0036] Of the n buckles, n-1 are located between the outer and inner rods of each group, and one is located between the first rod body 11a and the gripping rod.

[0037] Please see Figure 6 , Figure 6 This is a schematic diagram of the overall structure of the video capture device 2. The video capture device 2 includes a video mounting bracket 21, a battery 22, a camera 23, an antenna 24, and a circuit module 25.

[0038] The video mounting bracket 21 includes a housing 211, a tail cover 212, and a top cover 213. The housing 211 comprises two cylindrical sections, upper and lower, arranged coaxially, with the upper section having a larger diameter than the lower section. The top surface of the upper section of the housing 211 has a circuit module mounting slot, and the sidewall of the slot has a camera mounting hole and a switch mounting hole that communicate with the outside. The bottom surface of the lower section of the housing 211 has a battery mounting slot, the opening of which has an external thread for mounting the tail cover 212. The diameter of the circuit module mounting slot is slightly larger than the circuit module for heat dissipation, and a through battery positioning hole is provided between the circuit module mounting slot and the battery mounting slot.

[0039] The tail cap 212 comprises two cylindrical sections, upper and lower, arranged coaxially, with the lower section having a smaller diameter than the upper section. The top surface of the upper part of the tail cap 212 has a battery mounting groove, the top of which has an internal thread. The lower part of the tail cap 212 has a collector mounting groove, the diameter of which is the same as the outer diameter of the nth rod. The tail cap 212 is fixed by its upper internal thread engaging with the lower external thread of the housing 211, thus fixing the battery 22 within the battery mounting groove and the battery mounting groove of the video mounting bracket 21.

[0040] The top cover 213 is installed over the slot of the circuit module mounting slot.

[0041] The battery 22 is a lithium battery, with a power supply port at one end. The battery 22 is installed between the battery mounting slot of the housing 211 and the battery fixing slot of the tail cover 212, and the power supply port of the battery 22 passes through the battery positioning hole and enters the circuit module mounting slot.

[0042] The camera 23 is equipped with a high-voltage input terminal, a low-voltage input terminal, and a video output terminal connected to the circuit module 25. It obtains power supply voltage through the high-voltage and low-voltage input terminals and outputs video data to the circuit module 25 through the video output terminal. The lens of the camera 23 is horizontally fixed to the camera mounting hole of the housing 211, facing outwards. The lens of the camera 23 is provided with a crosshair alignment line, which serves as a positioning reference mark for the center of the captured image.

[0043] The antenna 24 is provided with a signal input terminal and a signal output terminal. The top of the antenna 24 passes through the top cover 213 to the outside, and its signal input terminal and signal output terminal are located in the circuit module mounting slot.

[0044] Please see Figure 7 , Figure 7This is a structural diagram of the circuit module 25. The circuit module 25 is fixed in the circuit module mounting slot on the housing 211. The circuit module 25 includes a first MOSFET, a first buck module LDD1, a second buck module LDD2, a third buck module LDD3, and a first main control chip.

[0045] The first MOSFET is an N-MOS transistor. Its gate is connected to the battery output interface via a self-resetting push-button switch to obtain the battery voltage. Its source directly obtains the battery voltage, and its drain is connected to the first buck module LDD1, the second buck module LDD2, and the third buck module LDD3 for voltage reduction. The second buck module LDD2 is connected to the high-voltage input terminal of the camera 23, and the third buck module LDD3 is connected to the low-voltage input terminal of the camera 23. The self-resetting push-button switch automatically pops up after being pressed for a period of time, disconnecting the gate of the first MOSFET from the battery 22, and it is mounted outward at the switch mounting hole.

[0046] The first buck module LDD1 reduces the output voltage of the first MOSFET to 3.3V. The second buck module LDD2 reduces the output voltage of the first MOSFET to 1.8V. The third buck module LDD3 reduces the output voltage of the first MOSFET to 1.2V.

[0047] The first main control chip has a power input terminal, a video input terminal, a control output terminal, and a video signal output terminal. Its power input terminal is connected to the first step-down module LDD1 to obtain a 3.3V power supply voltage; its video input terminal is connected to the video output terminal of the camera 23 to acquire the image data; the control output terminal is connected to the gate of the first MOSFET, and it maintains the DS channel conduction when the gate of the first MOSFET is disconnected from the battery 22 after the self-resetting button switch automatically pops up; the video signal output terminal is connected to the antenna through a coaxial line. The main control chip converts the image data from the camera 23 into a format suitable for WIFI transmission, and then the antenna converts it into video data for wireless transmission.

[0048] Please see Figure 8 , Figure 8 This is a schematic diagram of the overall structure of the AP repeater 3. The AP repeater 3 includes an AP mounting bracket 31, an AP battery 32, a gain antenna 33, and an AP circuit module 34.

[0049] The AP mounting bracket 31 includes an AP housing 311, an AP tail cap 312, and an AP top cap 313. The AP housing 311 comprises two cylindrical sections, one larger at the top and one smaller at the bottom, arranged coaxially. The top surface of the upper section of the AP housing 311 has an AP circuit module mounting slot, and the side has a locking groove for fixing to the locking protrusion on the grip rod. The bottom surface of the lower section of the AP housing 311 has an AP battery mounting slot, and the opening of the AP battery mounting slot has an external thread for mounting the AP tail cap 312. The diameter of the AP circuit module mounting slot is slightly larger than that of the AP circuit module for heat dissipation, and a through AP battery positioning hole is provided between the AP circuit module mounting slot and the AP battery mounting slot.

[0050] The AP tail cap 312 comprises two cylindrical sections, upper and lower, arranged coaxially, with the lower section having a smaller diameter than the upper section. The top surface of the upper part of the AP tail cap 312 has an AP battery mounting groove, and the top wall of the groove has an internal thread. The AP tail cap 312 is fixed by engaging its upper internal thread with the lower external thread of the AP housing 311, thus securing the AP battery 32 within the AP battery mounting groove and the AP battery mounting groove of the AP mounting bracket 31.

[0051] The AP top cover 313 is installed over the slot of the circuit module mounting slot.

[0052] The AP battery 32 is a lithium battery with an output interface at one end. The AP battery 32 is installed between the AP battery mounting slot of the AP housing 311 and the AP battery fixing slot of the AP tail cover 312, and the output interface of the AP battery 32 passes through the AP battery positioning hole and enters the AP circuit module mounting slot.

[0053] The gain antenna 33 is provided with a signal input terminal and a signal output terminal. The top of the gain antenna 33 passes through the AP top cover 313 to the outside, and its signal input terminal and signal output terminal are located in the AP circuit module mounting slot.

[0054] Please see Figure 9 , Figure 9This is a structural diagram of the AP circuit module 34. The AP circuit module 34 includes a second MOSFET and a second main control chip. The second MOSFET is an N-MOS transistor, whose gate is connected to the AP battery 32 via another self-resetting button switch to obtain the operating voltage. Its source directly obtains the operating voltage, and its drain is reduced to 3.3V through an AP step-down module LDD4. The AP self-resetting button switch automatically pops up after being pressed for a period of time, disconnecting the gate of the second MOSFET from the battery 22. The second main control chip is an ESP32 chip, which has a power supply input terminal, a control output terminal, a WIFI video signal input terminal, and a WIFI video signal output terminal. The power input terminal is connected to the AP step-down module to obtain the 3.3V power supply; the control output terminal is connected to the gate of the second MOSFET, and when the gate of the second MOSFET is disconnected from the battery 22 after the AP self-reset button switch automatically pops up, the DS channel remains on; the WIFI video signal input terminal is connected to the output terminal of the gain antenna 33 to obtain the WIFI video signal received by the gain antenna 33; the WIFI video signal output terminal is connected to the input terminal of the gain antenna 33, thereby re-propagating the received WIFI video signal outward.

[0055] Before use, assemble the telescopic pole 1, video capture device 2, and AP repeater 3 respectively. Then, fix the video capture device 2 to the top of the nth pole of the telescopic pole 1 through its capture device fixing slot. Secure the AP repeater 3 to the first pole 11a of the telescopic pole 1 through its side locking groove. At this time, the telescopic pole 1 is in the retracted state. Press the button switch of the video capture device 2 and the AP repeater 3 to start working, and receive the enhanced video data from the AP repeater 3 via a mobile phone. A crosshair alignment line appears in the video.

[0056] During use, the wrench of the latch 2 between the nth and (n-1)th rods is switched from the locked to the unlocked state and then rotated in the reverse direction. At this time, the nth rod can move up and down. The nth rod is pulled out to an appropriate length until the crosshairs in the mobile phone video are aligned with the top of the tree to be measured. At this time, the starting point of the scale value at the top of the telescopic rod is at the same height as the top of the tree to be measured. Then, the wrench is rotated in the forward direction to reduce the diameter of the upper section of the sleeve, thereby locking the nth rod. Then, the wrench is rotated to the locked state. At this time, part of the scale on the outer surface of the nth rod is blocked by the (n-1)th rod. The value of the scale of the nth rod at the point where it coincides with the top of the (n-1)th rod, plus the length of the first rod 11a, is the height of the tree to be measured.

[0057] When the nth rod is stretched to its limit, the crosshair in the video is still not aligned with the treetop. Tighten the buckle at its bottom. Then, loosen the buckle between the outer rods on the (n-1)th rod and adjust the length of the (n-1)th rod until it is stretched to its limit and locked. Then, adjust the next buckle and the length of the corresponding inner rod in the same way until the crosshair in the mobile phone video is aligned with the treetop to be tested, lock it, and take the reading.

[0058] When all n sections of the rod are fully extended, the height of the telescopic rod 1 is the maximum measuring height of this height measuring device.

[0059] Furthermore, to prevent inaccurate measurements due to the tilt of the telescopic rod during the measurement process, a level is also installed on the grip rod. The user can observe the level to ensure that the telescopic rod is vertical and the camera is horizontal during measurement.

[0060] In another embodiment, the level is capable of outputting level data, is installed within the video capture unit, connects to the first main control chip, and sends the level data to the first main control chip. The main control chip overlays the level data with the video data from the camera, thereby displaying the level data of the telescopic pole in real time in the video received by the terminal to adjust for tilt.

[0061] In another embodiment, the circuit module 25 of the video acquisition device 2 further includes an altimeter 26. The altimeter 26 has a power supply terminal and a data output terminal; the first main control chip also has a height data input terminal. The power supply terminal of the altimeter 26 is connected to the power supply output terminal of the first main control chip to obtain power, and its data output terminal is connected to the height data input terminal to transmit the obtained height data to the first main control chip. The first main control chip performs offset encoding on the acquired height data to obtain WIFI height information and outputs it to the antenna 23 for wireless transmission.

[0062] During use, adjust the length of the telescopic rod 1 until the crosshairs in the mobile phone video are aligned with the top of the tree to be measured. At this time, the height data in the altimeter is transmitted to the mobile phone via the AP repeater 3 in the form of WIFI. The height of the top of the tree to be measured is obtained based on the height data.

[0063] In another embodiment, the first MOS transistor is a P-MOS transistor, the gate of which is connected to the battery through the self-resetting push-button switch, its drain is directly connected to the battery, and its source is connected to the first buck module LDD1, the second buck module LDD2, and the third buck module LDD3; the control output terminal of the first main control chip is connected to the gate of the P-MOS transistor.

[0064] The second MOS transistor is a P-MOS transistor. Its gate is connected to the AP battery 32 through another self-resetting button switch to obtain the working voltage. Its source directly obtains the working voltage, and its drain is reduced to 3.3V through an AP step-down module LDD4.

[0065] In another embodiment, the first step-down module LDD1, the second step-down module LDD2, and the third step-down module LDD3 are directly connected to the battery 22 via a switch. The AP step-down module LDD4 is directly connected to the AP battery 32. The switch does not automatically reset.

[0066] Compared to existing technologies, the height measuring device of this invention can measure height close to the top of the tree by extending a telescopic rod, avoiding obstruction by dense foliage. Simultaneously, the video captured by the video acquisition device, with crosshairs, accurately locates the treetop, achieving high-precision tree height measurement. Furthermore, this application improves the stability of the measurement process and further enhances measurement accuracy by adjusting the structure of the video acquisition device to be installed along the extension direction of the telescopic rod and adjusting its center of gravity.

[0067] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of this application. The singular forms “a,” “the,” and “the” used in the embodiments and claims of this application are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that, unless otherwise stated, “a plurality” means two or more; the terms “first,” “second,” “third,” etc., are used only to distinguish and not to describe a particular order or sequence, nor should they be construed as indicating or implying relative importance. The term “and / or” as used herein refers to and includes any or all possible combinations of one or more associated listed items. When the above description relates to drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. In the description of this application, those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0068] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and this utility model also intends to include these modifications and variations.

Claims

1. A height measuring device, characterized in that, include: Telescopic pole and a video capture device mounted on top of the telescopic pole; The outer surface of the telescopic rod is provided with graduations; The video capture device includes: The video mounting bracket is vertically installed on top of the telescopic pole; A camera, the lens of which is disposed on the side wall of the video mounting bracket facing outward; the video image captured by the camera displays a positioning reference mark; The first main control chip is located inside the video mounting bracket and is used to process the image data captured by the camera and send the processed video data to the WiFi antenna. A WiFi antenna is installed inside the video mounting bracket and is used to transmit the received video data. The battery is located within the video mounting bracket and powers the camera, the first main control chip, and the WiFi antenna.

2. The height measuring device according to claim 1, characterized in that, The telescopic rod includes a first rod at the bottom and an nth rod at the top, and also includes (n-2) intermediate rods connecting the first rod and the nth rod, where n is a positive integer not less than 2; The bottom end of the first rod is provided with a scale start line, and the scale of the first rod gradually increases from bottom to top; The uppermost scale of the nth rod coincides with the largest scale on the first rod, and the scale of the nth rod gradually increases from top to bottom; Starting from the nth rod, except for the first rod, the scales on the other rods gradually increase from top to bottom, and the maximum scale value at the bottom of the previous rod is aligned with the minimum scale value at the top of the next rod.

3. The height measuring device according to claim 2, characterized in that, It also includes a level, which is mounted on the first or nth branch of the telescopic rod.

4. The height measuring device according to claim 2, characterized in that, The video mounting bracket includes a housing, a tail cover, and a top cover; The housing is cylindrical; the top surface of the housing is provided with a circuit module mounting slot for mounting the first main control chip; the bottom surface of the housing is provided with a battery mounting slot. The bottom surface of the tail cap is provided with a collector mounting groove, the diameter of which is the same as the outer diameter of the top of the telescopic rod; the tail cap is fixed to the bottom surface of the housing, and the battery is fixed in the battery mounting groove of the housing; The top cover is installed over the slot of the circuit module mounting groove.

5. The height measuring device according to claim 4, characterized in that, The video capture device also includes a switch, a first step-down module, a second step-down module, and a first main control chip; Both the first step-down module and the second step-down module are connected to the battery through the switch to obtain the battery voltage and step down the obtained voltage. The power supply terminal of the camera is connected to the second step-down module to obtain the power supply voltage, and the captured video image is output at its video output terminal; The first main control chip has a power input terminal, a video input terminal and a video signal output terminal, and its power input terminal is connected to the first step-down module to obtain the power supply voltage; Its video input terminal is connected to the video output terminal of the camera to acquire the video image; the video signal output terminal is connected to the antenna through a coaxial line, and the main control chip converts the video image into wireless video data and outputs it to the antenna for wireless transmission.

6. The height measuring device according to claim 5, characterized in that, The switch is a self-resetting push button switch; it rebounds after being pressed for a period of time; the first main control chip also has a control output terminal; The video acquisition device also includes an N-MOS transistor; the gate of the N-MOS transistor is connected to the battery through the self-resetting push-button switch, its source is directly connected to the battery, and its drain is connected to the first buck module and the second buck module; the control output terminal of the first main control chip is connected to the gate of the N-MOS transistor. Alternatively, the video capture device may also include a P-MOS transistor; the gate of the P-MOS transistor is connected to the battery through the self-resetting push-button switch, its drain is directly connected to the battery, and its source is connected to the first buck module and the second buck module; the control output terminal of the first main control chip is connected to the gate of the P-MOS transistor.

7. The height measuring device according to claim 2, characterized in that, It also includes an AP repeater, which receives the WIFI video data wirelessly transmitted by the video capture device and retransmits it outward as a WIFI signal.

8. The height measuring device according to claim 7, characterized in that, The AP repeater includes an AP battery, a gain antenna, and an AP circuit module; The gain antenna can simultaneously receive and transmit WIFI signals. The AP circuit module includes an N-MOS transistor and a second main control chip; the gate of the N-MOS transistor is connected to the battery through a self-resetting push-button switch, its source is directly connected to the battery, and its drain is stepped down to reduce the output voltage through an AP step-down module. Alternatively, the AP circuit module includes a P-MOS transistor and a second main control chip; the gate of the P-MOS transistor is connected to the AP battery through a self-resetting push-button switch, its drain is directly connected to the battery, and its source is stepped down to reduce the output voltage through an AP step-down module. The second main control chip has a power supply input terminal, a control output terminal, a WIFI video signal input terminal, and a WIFI video signal output terminal. The power supply input terminal is connected to the AP step-down module, the control output terminal is connected to the gate of the N-MOS transistor or P-MOS transistor, and the WIFI video data input terminal and WIFI video data output terminal are connected to the gain antenna, so that the WIFI video data received by the gain antenna is transmitted again through the gain antenna.

9. The height measuring device according to claim 8, characterized in that, The AP repeater also includes an AP housing, an AP tail cover, and an AP top cover; The top surface of the housing is provided with an AP circuit module mounting slot, and the bottom surface is provided with an AP battery mounting slot; the diameter of the AP circuit module mounting slot is slightly larger than that of the AP battery mounting slot. The top surface of the AP tail cover is provided with an AP battery fixing slot, and the bottom surface is provided with a collector fixing slot; the AP tail cover is fixed to the bottom surface of the AP housing, and the AP battery is fixed in the AP battery mounting slot and the AP battery fixing slot. The AP top cover is installed over the slot of the AP circuit module mounting groove.

10. The height measuring device according to claim 6 or 9, characterized in that, The video acquisition device also includes an altimeter; the first main control chip is also provided with an altitude data input terminal, which is connected to the data output terminal of the altimeter to receive altitude data, convert the altitude data into WIFI altitude information and output it to the antenna.

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