Sampling pit depth standard combination detection system and method

Abstract

The invention relates to a sampling pit depth standard combination detection system which comprises an image acquisition device, an equipment attitude measurement device, an equipment height measurement device, an attitude calibration device, a vertical scale, a communication module and a background server. The invention further relates to a sampling pit depth standard-matching detection method. The method comprises the following steps: inserting the vertical scale into the sampling pit; calibrating the posture of the equipment bearing platform; recording the ground clearance elevation; the equipment bearing platform is rotated until the laser rays irradiate the mark points of the vertical ruler; shooting a mark point photo; recording an inclination angle; the equipment bearing platform is rotated again until the laser rays irradiate the insertion point of the vertical ruler and the pit bottom; shooting a pit bottom picture; recording an inclination angle; and calculating to obtain the sampling pit depth. According to the invention, the pit depth can be identified with high precision, and the tolerance to the change of ambient light is very high; various measuring tools do not need to be carried and held by hands, hands of workers are liberated, the measuring period is short, and the efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of mining sampling operations, and in particular to a sampling pit depth compliance detection system and method. Background Art

[0002] When inspecting coal mines and metal ore powder block piles, it is often necessary to take samples of powder block samples;

[0003] Usually, according to the sampling standard requirements of each unit, and to prevent the phenomenon of uneven sampling of block or powder sample piles or vehicles, and good quality powder objects only on the surface layer, when sampling, it is required to take multiple sampling points (pits) when sampling on different piles or vehicles, and there are certain requirements for the depth of each pit, such as the sampling pit depth>300mm, to ensure that the samples taken out are mixed and divided and sampled to a certain extent to be representative when analyzing their performance parameters;

[0004] In some areas with good sampling conditions, mechanical direct sampling can be achieved, but in some areas, mechanical sampling cannot be achieved due to environmental factors, and manual sampling can only be adopted. The method is to dig pits at multiple points and then take samples from the bottom of the pits to ensure that the sampling is representative.

[0005] For manual sampling, due to the above reasons, the sampling pit needs to be dug to a certain depth to achieve the effectiveness of sampling, so it is inevitable to involve the depth measurement of the sampling pit; the existing technology generally has two methods for the depth measurement of the sampling pit: estimation method and measurement method:

[0006] The so-called estimation method is to rely on the experience of the staff to estimate the value of a pit depth by visual inspection, etc. This method is obviously inaccurate and unreliable;

[0007] There are many methods of measuring, but generally they all involve inserting a ruler into the bottom of the pit, and then using various methods to horizontally map the upper edge of the sampling pit onto the ruler to get a reading;

[0008] The shortcomings of the measurement method are:

[0009] 1. Since the sampling pit itself is an irregular space, the error in horizontally mapping the upper edge of the sampling pit to the ruler is large;

[0010] 2. Since the measurement method requires carrying various measuring tools, it will be very cumbersome in the actual working environment, thus increasing the burden on the staff;

[0011] 3. Since the measurement method requires stopping to set up and operate the measuring tools, it is time-consuming, and the sampling pits are often excavated multiple times during the work process, which results in a lot of measurement time and delays the overall work progress;

[0012] Based on the measurement method, there are also technical solutions that use manual measurement tools and take photos or videos. In this type of technical solution, taking photos or videos is only an auxiliary recording method, and manual measurement is still required, which is often difficult to operate and brings more inconvenience to the sampler. To determine whether the sampling depth is standardized, it is still necessary to manually check the video or photos afterwards, which is inefficient and difficult to detect in time, and there is a lack of effective supervision on the standardization of manual sampling.

[0013] In addition, there is another type of existing technology that takes photos and then uses image recognition technology to determine the pit depth. The defects of this type of technology are:

[0014] 1. Since the image recognition technology solution only uses the method of photographing the image to identify the label on the sampling tool to determine the pit depth, there will be different weather, light and other factors, which will lead to poor accuracy of identifying the label;

[0015] 2. Since the image recognition conclusions fluctuate greatly, it will actually affect the recognition efficiency. Summary of the invention

[0016] In view of the above problems, the present invention provides a sampling pit depth compliance detection system and method, which aims to identify the pit depth with high precision and has a very high tolerance for changes in ambient light. It does not require carrying or hand-operating various measuring tools, freeing the hands of the staff, and has a short measurement cycle and high efficiency.

[0017] To solve the above problems, the technical solution provided by the present invention is:

[0018] A sampling pit depth compliance detection system includes an image acquisition device, an equipment posture measurement device, an equipment height measurement device, a posture calibration device, a vertical ruler, a communication module, and a background server; wherein:

[0019] The image acquisition device, the device posture measurement device, the device height measurement device, and the communication module are integrated on the same device carrying platform;

[0020] The image acquisition device is used to take photos of the bottom of the sampling pit and the vertical ruler to obtain photos of the pit bottom and the marking points;

[0021] The device attitude measurement device is used to measure the attitude data of the device carrying platform; the attitude data includes direction angle, tilt angle, and rotation angle; wherein:

[0022] The direction angle is used to represent the front of the device carrying platform; the direction pointed by the direction angle is parallel to the optical axis of the lens of the image acquisition device;

[0023] The tilt angle is used to characterize the angle between the front of the equipment carrying platform and the vertical direction;

[0024] The rotation angle is used to represent the deflection angle of the equipment carrying platform with the front as the rotation axis;

[0025] The equipment height measuring device is used to measure the height of the equipment carrying platform from the ground;

[0026] The posture calibration device is used to calibrate the posture of the equipment carrying platform when using the detection system, so that the direction angle is parallel to the horizontal plane and points to the vertical ruler, and the value of the rotation angle is 0;

[0027] The vertical ruler is a straight rod with a marking point on it;

[0028] The image acquisition device, the device posture measurement device, and the device height measurement device are data connected with the background server through the communication module;

[0029] The backend server calculates the sampling pit depth based on the received pit bottom photo, the marked point photo, the posture data, and the ground elevation.

[0030] Preferably, the image acquisition device is an industrial camera;

[0031] The device carrying platform is a head-mounted platform.

[0032] Preferably, the device attitude measurement device comprises a horizontal angle measuring instrument, a vertical gyroscope, and a rotating gyroscope; wherein:

[0033] The horizontal angle measuring instrument is used to collect the direction angle;

[0034] The vertical gyroscope is used to collect the tilt angle;

[0035] The rotating gyroscope is used to collect the rotation angle.

[0036] Preferably, the posture calibration device comprises a level, a fan-shaped laser transmitter, and a line laser transmitter; wherein:

[0037] The level is used to calibrate the measuring surface of the horizontal angle measuring instrument to be parallel to the horizontal plane;

[0038] The line laser emitter is used to emit a laser ray; the laser ray is parallel to the optical axis of the lens of the image acquisition device;

[0039] The fan-shaped laser emitter is used to emit a fan-shaped laser; the fan-shaped laser emitted by the line laser emitter passes through the laser ray emitted by the line laser emitter and is perpendicular to the measuring surface of the horizontal angle measuring instrument.

[0040] A sampling pit depth compliance detection method using the sampling pit depth compliance detection system comprises the following steps:

[0041] S100. Insert the vertical ruler into the sampling pit where the depth needs to be measured and keep it perpendicular to the horizontal plane;

[0042] S200. Calibrate the posture of the equipment carrying platform using the posture calibration device until the measuring surface of the horizontal angle measuring instrument is parallel to the horizontal plane, and the fan-shaped laser passes through the vertical ruler, and the projection of the fan-shaped laser on the vertical ruler is a straight line;

[0043] Then record the height above the ground at this time;

[0044] S300. Keep the projection of the fan-shaped laser on the vertical ruler as a straight line, keep the rotation angle at 0, and rotate the device carrying platform until the laser ray irradiates the marking point on the vertical ruler;

[0045] Then, the image acquisition device is turned on to take a photo of the marking point; and the tilt angle at this time is recorded;

[0046] S400. Keep the projection of the fan-shaped laser on the vertical ruler as a straight line, keep the rotation angle at 0, and rotate the device carrying platform again until the laser ray irradiates the insertion point between the vertical ruler and the pit bottom;

[0047] Then the image acquisition device is turned on again to take a photo of the pit bottom; and the inclination angle at this time is recorded;

[0048] S500. The elevation above the ground, the inclination angles obtained through two acquisitions, the photos of the marking points, and the photos of the pit bottom are transmitted to the backend server to calculate the depth of the sampling pit.

[0049] Preferably, S500 specifically includes the following steps:

[0050] S510. Identify the marked point photo, and then calculate a first angle in combination with the tilt angle recorded while taking the marked point photo; the first angle is used to represent the angle between the laser ray and the vertical direction when the laser ray is irradiated on the marked point of the vertical ruler;

[0051] Then, the pit bottom photo is identified, and then the second angle is calculated in combination with the inclination angle recorded while taking the mark point photo; the second angle is used to represent the angle between the laser ray and the vertical direction when the laser ray is irradiated on the insertion point between the vertical scale and the pit bottom;

[0052] S520. Calculate the angle difference;

[0053] S530. Calculate the distance between the marking point and the insertion point between the vertical ruler and the pit bottom;

[0054] S540. Calculate the distance between the line laser transmitter and the marking point;

[0055] S550. Calculate the horizontal distance between the line laser transmitter and the vertical ruler;

[0056] S560. Calculate the vertical distance between the line laser transmitter and the lower top of the vertical ruler;

[0057] S570. Calculate the depth of the sampling pit.

[0058] Preferably, the angle difference in S520 is expressed as follows:

[0059] γ=β-α, wherein: γ is the angle difference; β is the first angle; α is the second angle;

[0060] The distance between the marking point in S530 and the insertion point between the vertical scale and the pit bottom is expressed as follows:

[0061] FC=FD-CD

[0062] Among them: FC is the distance between the marking point and the insertion point of the vertical ruler and the bottom of the pit; FD is the distance between the marking point and the lower top of the vertical ruler; CD is the length of the vertical ruler inserted into the bottom of the pit.

[0063] Preferably, the distance between the line laser transmitter and the marking point in S540 is expressed as follows:

[0064] sin(γ) / FC=sin(α) / AF

[0065] Wherein: AF is the distance between the line laser transmitter and the marking point;

[0066] The horizontal distance between the line laser transmitter and the vertical scale in S550 is expressed as follows:

[0067]

[0068] Wherein: AA' is the horizontal distance between the line laser transmitter and the vertical ruler.

[0069] Preferably, the vertical distance between the line laser transmitter and the lower top of the vertical ruler in S560 is expressed as follows:

[0070]

[0071] Wherein: C'C is the horizontal distance between the line laser emitter and the lower top of the vertical ruler.

[0072] Preferably, the sampling pit depth in S570 is expressed as follows:

[0073] OC'=AC'-AO

[0074] Wherein: OC' is the depth of the sampling pit; AO is the elevation above the ground.

[0075] Compared with the prior art, the present invention has the following advantages:

[0076] 1. Since the present invention adopts laser positioning and posture measurement, supplemented by image recognition to compensate for errors, it can achieve high-precision identification of pit depth and has a very high tolerance to changes in ambient light;

[0077] 2. Since the present invention uses laser line to guide photography, the photographer only needs to turn on the laser line switch in the cap, and then aim at the pit bottom and the sampling tool label twice to take pictures, so as to obtain the pit depth data calculated by the background server in real time. There are not many requirements for the influence of environmental factors when taking pictures. The operator does not need very accurate photography operation skills, and there is no need to carry or hold various measuring tools, which frees the hands of the staff, shortens the measurement cycle and improves efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0078] Figure 1 It is a schematic diagram of the measurement working condition of a specific embodiment of the present invention;

[0079] Figure 2 This is a photo of a vertical ruler of a specific embodiment of the present invention when it is upright, wherein the red circle is a marking point;

[0080] Figure 3 This is a screenshot of the tilt angle obtained by the background server of a specific embodiment of the present invention when taking a photo. DETAILED DESCRIPTION

[0081] The present invention is further explained below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0082] like Figure 1 As shown, a sampling pit depth compliance detection system includes an image acquisition device, an equipment posture measurement device, an equipment height measurement device, a posture calibration device, a vertical ruler, a communication module, and a background server; wherein:

[0083] An image acquisition device, a device posture measurement device, a device height measurement device, and a communication module are integrated on the same device carrying platform.

[0084] In this specific embodiment, the device carrying platform is a head-mounted platform, and the specific technical solution adopted is a smart helmet.

[0085] The advantage of using a smart helmet is that it not only meets the safety requirements of the daily working environment, but also integrates an image acquisition device, an equipment posture measurement device, an equipment height measurement device, and a communication module. It does not require staff to perform handheld operations. By reasonably adjusting the shooting angle of the image acquisition device to make it consistent with the direction of the human eye's direct view, what you see is what you get, which is very convenient.

[0086] The image acquisition device is used to take photos of the bottom and vertical scale of the sampling pit to obtain photos of the pit bottom and marked points.

[0087] In this specific embodiment, the image acquisition device is an industrial camera.

[0088] The equipment attitude measurement device is used to measure the attitude data of the equipment carrying platform; the attitude data includes the direction angle, tilt angle, and rotation angle; among which:

[0089] The direction angle is used to represent the front of the equipment carrying platform; the direction pointed by the direction angle is parallel to the optical axis of the lens of the image acquisition device.

[0090] The tilt angle is used to characterize the angle between the front of the equipment carrying platform and the vertical direction.

[0091] The rotation angle is used to characterize the deflection angle of the equipment support platform with the front as the rotation axis.

[0092] In this specific embodiment, the device posture measurement device includes a horizontal angle measuring instrument, a vertical gyroscope, and a rotating gyroscope; wherein:

[0093] The horizontal angle measuring instrument is used to collect the direction angle.

[0094] The vertical gyroscope is used to acquire the tilt angle.

[0095] The spinning gyroscope is used to acquire the rotation angle.

[0096] The equipment height measuring device is used to measure the height of the equipment carrying platform from the ground.

[0097] The posture calibration device is used to calibrate the posture of the equipment carrying platform when using this detection system, so that the direction angle is parallel to the horizontal plane and points to the vertical scale, and the value of the rotation angle is 0.

[0098] In this specific embodiment, the posture calibration device includes a level, a fan-shaped laser transmitter, and a line laser transmitter; wherein:

[0099] The spirit level is used to calibrate the measuring surface of the horizontal angle measuring instrument to be parallel to the horizontal plane.

[0100] The line laser transmitter is used to emit a laser beam; the laser beam is parallel to the optical axis of the lens of the image acquisition device.

[0101] The fan-shaped laser transmitter is used to transmit a fan-shaped laser; the fan-shaped laser transmitted by the line laser transmitter passes through the laser beam transmitted by the line laser transmitter and is perpendicular to the measuring surface of the horizontal angle measuring instrument.

[0102] A vertical ruler is a straight rod with a marked point on it.

[0103] In this specific embodiment, the vertical ruler is the sampling tool, i.e., a shovel, which further reduces the number of equipment that the staff has to carry and achieves the functional integration of the equipment; specifically, a reflective label is used on the handle rod of the sampling tool shovel to mark the height, which is the required marking point; the marking point is the sampling depth indicator, and the height range between the marking point and the iron head of the shovel is 500mm to 600mm, which is greater than the standard requirement for the pit depth; the standard requirement for the pit depth is 300mm.

[0104] Furthermore, when the sampler measures the pit depth, the sampling tool is inserted vertically with the bottom end of the tool into the bottom of the pit. Generally, the insertion depth is about 50 mm.

[0105] The image acquisition device, the equipment posture measurement device and the equipment height measurement device are connected to the background server through the communication module to achieve data connection.

[0106] The backend server calculates the depth of the sampling pit based on the received pit bottom photos, marked point photos, posture data, and ground elevation.

[0107] The communication module is a 4G or 5G IoT communication module.

[0108] A sampling pit depth compliance detection method using a sampling pit depth compliance detection system comprises the following steps:

[0109] like Figure 2 As shown, S100. insert the vertical ruler into the sampling pit whose depth needs to be measured and keep it perpendicular to the horizontal plane.

[0110] S200. Use the attitude calibration device to calibrate the attitude of the equipment carrying platform until the measuring surface of the horizontal angle measuring instrument is parallel to the horizontal plane, and the fan-shaped laser passes through the vertical ruler, and the projection of the fan-shaped laser on the vertical ruler is a straight line.

[0111] Then record the height above the ground at this time.

[0112] S300. Keep the projection of the fan-shaped laser on the vertical ruler as a straight line and keep the rotation angle at 0, and rotate the equipment carrying platform until the laser beam shines on the marking point of the vertical ruler.

[0113] Then turn on the image acquisition device to take a photo of the marked point; at the same time, record the tilt angle at this time.

[0114] S400. Keep the projection of the fan-shaped laser on the vertical ruler as a straight line and keep the rotation angle at 0, and rotate the equipment carrying platform again until the laser beam shines on the insertion point between the vertical ruler and the bottom of the pit.

[0115] Then turn on the image acquisition device again to take a photo of the pit bottom; at the same time, record the inclination angle at this time.

[0116] S500. The ground elevation, the tilt angles obtained from the two acquisitions, the photos of the marking points, and the photos of the pit bottom are transmitted to the backend server to calculate the depth of the sampling pit.

[0117] In this specific embodiment, S500 specifically includes the following steps:

[0118] like Figure 3 As shown, S510. The marked point photo is identified, and then the first angle is calculated based on the tilt angle recorded while the marked point photo is taken; the first angle is used to represent the angle between the laser ray and the vertical direction when the laser ray is irradiated on the marked point of the vertical ruler.

[0119] The pit bottom photo is then identified, and the second angle is calculated based on the inclination angle recorded while taking the marked point photo. The second angle is used to characterize the angle between the laser ray and the vertical direction when the laser ray is irradiated on the insertion point between the vertical ruler and the pit bottom.

[0120] like Figure 1 As shown, S520. Calculate the angle difference.

[0121] In this specific embodiment, the angle difference in S520 is expressed as follows:

[0122] γ=β-α

[0123] Among them: γ is the angle difference; β is the first angle; α is the second angle.

[0124] In this specific embodiment, it is measured that: β = 30°, α = 22.85°; thus, it can be calculated that:

[0125] γ=β-α=30°-22.85°=7.15°

[0126] like Figure 1 As shown, S530. Calculate the distance between the marking point and the insertion point between the vertical ruler and the pit bottom.

[0127] The distance between the marked point in S530 and the insertion point of the vertical ruler and the pit bottom is expressed as follows:

[0128] FC=FD-CD

[0129] Among them: FC is the distance between the marking point and the insertion point of the vertical ruler and the bottom of the pit; FD is the distance between the marking point and the lower top of the vertical ruler; CD is the length of the vertical ruler inserted into the bottom of the pit.

[0130] In this specific embodiment, CD = 50 mm, FD = 550 mm; thus, it can be calculated that:

[0131] FC=FD-CD=550mm-50mm=500mm

[0132] like Figure 1 As shown, S540. Calculate the distance between the line laser transmitter and the marking point.

[0133] In this specific embodiment, the distance between the centerline laser emitter in S540 and the marking point is expressed as follows:

[0134] sin(γ) / FC=sin(α) / AF

[0135] Where: AF is the distance between the line laser transmitter and the marking point.

[0136] Substituting the above data, we can get:

[0137] AF=500mm*sin(22.85°) / sin(7.15°)=1559.93mm

[0138] like Figure 1 As shown, S550. Calculate the horizontal distance between the line laser transmitter and the vertical ruler.

[0139] The horizontal distance between the S550 centerline laser transmitter and the vertical scale is expressed as follows:

[0140]

[0141] Wherein: AA' is the horizontal distance between the line laser transmitter and the vertical ruler.

[0142] Substituting the above data, we can get:

[0143] AA'=AF*cos(90°-β)=1559.93mm*cos(90°-30°)=779.97mm

[0144] like Figure 1 As shown, S560. Calculate the vertical distance between the line laser transmitter and the lower top of the vertical ruler.

[0145] In this specific embodiment, the vertical distance between the S560 centerline laser emitter and the lower top of the vertical scale is expressed as follows:

[0146]

[0147] Where: is the horizontal distance between the C'C line laser transmitter and the lower top of the vertical ruler.

[0148] Because C'C=AA', we have C'C=AA'=779.97mm.

[0149] Thus we can calculate:

[0150] AC'=C'C / tan(α)=779.97mm / tan(22.85°)=1850.95mm

[0151] like Figure 1 As shown, S570. Calculate the sampling pit depth.

[0152] In this specific embodiment, the depth of the sampling pit in S570 is expressed as follows:

[0153] OC'=AC'-AO

[0154] Where: OC' is the depth of the sampling pit; AO is the elevation above the ground.

[0155] In this specific embodiment, AO=1700 mm is measured; therefore, the sampling pit depth can be finally calculated as:

[0156] OC'=AC'-AO=1850.95mm-1700mm=150.95mm

[0157] In the above detailed description, various features are grouped together in a single embodiment to simplify the disclosure. This method of disclosure should not be interpreted as reflecting an intention that the embodiments of the claimed subject matter require more features than are clearly stated in each claim. On the contrary, as reflected in the appended claims, the invention is in a state of having less than all the features of the disclosed individual embodiments. Therefore, the appended claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the invention.

[0158] The disclosed embodiments are described above to enable any person skilled in the art to implement or use the present invention. Various modifications of these embodiments are obvious to those skilled in the art, and the general principles defined herein may also be applied to other embodiments without departing from the spirit and scope of the present disclosure. Therefore, the present disclosure is not limited to the embodiments given herein, but is consistent with the broadest scope of the principles and novel features disclosed in this application.

[0159] The above description includes examples of one or more embodiments. Of course, it is not possible to describe all possible combinations of components or methods for the purpose of describing the above embodiments, but it should be recognized by those skilled in the art that the various embodiments may be further combined and arranged. Therefore, the embodiments described herein are intended to cover all such changes, modifications and variations that fall within the scope of protection of the appended claims. In addition, with respect to the term "comprising" used in the specification or claims, the word is covered in a manner similar to the term "including", just as "including," is explained as a transitional word in the claims. In addition, any term "or" used in the specification of the claims is intended to mean "non-exclusive or".

[0160] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A sampling pit depth compliance detection system, Features: It includes an image acquisition device, an equipment posture measurement device, an equipment height measurement device, a posture calibration device, a vertical ruler, a communication module, and a background server; wherein: The image acquisition device, the device posture measurement device, the device height measurement device, and the communication module are integrated on the same device carrying platform; The image acquisition device is used to take photos of the bottom of the sampling pit and the vertical ruler to obtain photos of the pit bottom and the marking points; The device attitude measurement device is used to measure the attitude data of the device carrying platform; the attitude data includes direction angle, tilt angle, and rotation angle; wherein: The direction angle is used to represent the front of the device carrying platform; the direction pointed by the direction angle is parallel to the optical axis of the lens of the image acquisition device; The tilt angle is used to characterize the angle between the front of the equipment carrying platform and the vertical direction; The rotation angle is used to represent the deflection angle of the equipment carrying platform with the front as the rotation axis; The equipment height measuring device is used to measure the height of the equipment carrying platform from the ground; The posture calibration device is used to calibrate the posture of the equipment carrying platform when using the detection system, so that the direction angle is parallel to the horizontal plane and points to the vertical ruler, and the value of the rotation angle is 0; The vertical ruler is a straight rod with a marking point on it; The image acquisition device, the device posture measurement device, and the device height measurement device are data connected with the background server through the communication module; The backend server calculates the sampling pit depth based on the received pit bottom photo, the marked point photo, the posture data, and the ground elevation.

2. The sampling pit depth compliance detection system according to claim 1, Features: The image acquisition device is an industrial camera; The device carrying platform is a head-mounted platform.

3. The sampling pit depth compliance detection system according to claim 2, Features: The device attitude measurement device comprises a horizontal angle measuring instrument, a vertical gyroscope, and a rotating gyroscope; wherein: The horizontal angle measuring instrument is used to collect the direction angle; The vertical gyroscope is used to collect the tilt angle; The rotating gyroscope is used to collect the rotation angle.

4. The sampling pit depth compliance detection system according to claim 3, Features: The posture calibration device comprises a level, a fan-shaped laser transmitter, and a line laser transmitter; wherein: The level is used to calibrate the measuring surface of the horizontal angle measuring instrument to be parallel to the horizontal plane; The line laser emitter is used to emit a laser ray; the laser ray is parallel to the optical axis of the lens of the image acquisition device; The fan-shaped laser emitter is used to emit a fan-shaped laser; the fan-shaped laser emitted by the line laser emitter passes through the laser ray emitted by the line laser emitter and is perpendicular to the measuring surface of the horizontal angle measuring instrument.

5. A sampling pit depth compliance detection method using the sampling pit depth compliance detection system according to claim 4, Features: The following steps are involved: S100. Insert the vertical ruler into the sampling pit where the depth needs to be measured and keep it perpendicular to the horizontal plane; S200. Calibrate the posture of the equipment carrying platform using the posture calibration device until the measuring surface of the horizontal angle measuring instrument is parallel to the horizontal plane, and the fan-shaped laser passes through the vertical ruler, and the projection of the fan-shaped laser on the vertical ruler is a straight line; Then record the height above the ground at this time; S300. Keep the projection of the fan-shaped laser on the vertical ruler as a straight line, keep the rotation angle at 0, and rotate the device carrying platform until the laser ray irradiates the marking point on the vertical ruler; Then, the image acquisition device is turned on to take a photo of the marking point; and the tilt angle at this time is recorded; S400. Keep the projection of the fan-shaped laser on the vertical ruler as a straight line, keep the rotation angle at 0, and rotate the device carrying platform again until the laser ray irradiates the insertion point between the vertical ruler and the pit bottom; Then the image acquisition device is turned on again to take a photo of the pit bottom; and the inclination angle at this time is recorded; S500. The elevation above the ground, the inclination angles obtained through two acquisitions, the photos of the marking points, and the photos of the pit bottom are transmitted to the backend server to calculate the depth of the sampling pit.

6. The sampling pit depth compliance detection method according to claim 5, Features: S500 specifically includes the following steps: S510. Identify the marked point photo, and then calculate a first angle in combination with the tilt angle recorded while taking the marked point photo; the first angle is used to represent the angle between the laser ray and the vertical direction when the laser ray is irradiated on the marked point of the vertical ruler; Then, the pit bottom photo is identified, and then the second angle is calculated in combination with the inclination angle recorded while taking the mark point photo; the second angle is used to represent the angle between the laser ray and the vertical direction when the laser ray is irradiated on the insertion point between the vertical scale and the pit bottom; S520. Calculate the angle difference; S530. Calculate the distance between the marking point and the insertion point between the vertical ruler and the pit bottom; S540. Calculate the distance between the line laser transmitter and the marking point; S550. Calculate the horizontal distance between the line laser transmitter and the vertical ruler; S560. Calculate the vertical distance between the line laser transmitter and the lower top of the vertical ruler; S570. Calculate the depth of the sampling pit.

7. The sampling pit depth compliance detection method according to claim 6, Features: The angle difference in S520 is expressed as follows: γ=β-α Wherein: γ is the angle difference; β is the first angle; α is the second angle; The distance between the marking point in S530 and the insertion point between the vertical scale and the pit bottom is expressed as follows: FC=FD-CD Among them: FC is the distance between the marking point and the insertion point of the vertical ruler and the bottom of the pit; FD is the distance between the marking point and the lower top of the vertical ruler; CD is the length of the vertical ruler inserted into the bottom of the pit.

8. The sampling pit depth compliance detection method according to claim 7, Features: The distance between the line laser transmitter and the marking point in S540 is expressed as follows: sin(γ) / FC=sin(α) / AF Wherein: AF is the distance between the line laser transmitter and the marking point; The horizontal distance between the line laser transmitter and the vertical scale in S550 is expressed as follows: Wherein: AA' is the horizontal distance between the line laser transmitter and the vertical ruler.

9. The sampling pit depth compliance detection method according to claim 8, Features: The vertical distance between the line laser transmitter and the lower top of the vertical ruler in S560 is expressed as follows: Wherein: C'C is the horizontal distance between the line laser emitter and the lower top of the vertical ruler.

10. The sampling pit depth compliance detection method according to claim 9, Features: The sampling pit depth described in S570 is expressed as follows: OC'=AC'-AO Wherein: OC' is the depth of the sampling pit; AO is the elevation above the ground.

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