A multifunctional anchor hole parameter measuring device

Abstract

The present invention belongs to the technical field of anchor hole parameter measurement, and specifically relates to a multifunctional anchor hole parameter measurement device, which is mainly used for real-time monitoring of the internal conditions of earthen site anchor holes. It includes a measuring actuator, a transmission connection mechanism, and a numerical display mechanism; the measuring actuator is used to measure specific parameters in the anchor hole; the transmission connection mechanism is used to drive the measuring actuator; and the numerical display mechanism is used to display various data measured by the measuring actuator. The present invention is a multifunctional anchor hole parameter measurement device with rich functions, high integration, simple structure, easy disassembly, and convenient carrying.

Description

Technical Field

[0001] The invention belongs to the technical field of anchor hole parameter measurement, and in particular relates to a multifunctional anchor hole parameter measurement device, which is mainly used for real-time monitoring of the internal conditions of an anchor hole in an earthen site. Background Art

[0002] Earthen sites are important carriers of human history and culture, and have great historical, artistic and scientific value. There are a large number of earthen sites in major arid regions of Asia, Africa, North America and South America, and their types are quite rich. For example, the Great Wall and its ancillary buildings from the Qin Dynasty to the Ming Dynasty along the Silk Road in China, Buddhist temple sites and ancient cities from different historical periods are all representatives of earthen sites. However, under the influence of various natural forces such as wind erosion, rain erosion, freeze-thaw, earthquakes and human activities for a long time, the widespread development of diseases such as collapse, cracks and erosion directly or indirectly leads to the instability and destruction of earthen sites, becoming the primary problem endangering the safe preservation of earthen sites. Anchoring technology has been widely used in the field of stability control of earthen sites due to its characteristics of weak disturbance, strong concealment, effective control of deformation and crack development, and mobilization of the soil's own bearing capacity.

[0003] During the anchoring construction of earthen sites, anchor holes are often made by hand or by machine, and the quality of the holes is affected by human factors and the disturbance of the drilling device itself. According to the on-site conditions, the inner diameter of the anchor hole at different depths is different due to the vibration of the drilling device. If the inner diameter of the anchor hole at a certain depth exceeds the designed allowable deviation value after drilling, it will directly affect the anchoring effect and even make the anchoring completely ineffective, which is extremely unfavorable to the safety during the service period. Therefore, it is very necessary to measure the depth of the anchor hole at different positions and the corresponding inner diameter of the hole, and to reflect the geometric parameters of the anchor hole in a three-dimensional way, which is very necessary for the quality control of the anchoring process. In addition, the anchoring design also needs to comprehensively consider the soil characteristics, hole wall roughness, temperature and humidity inside the anchor hole, so as to meet the needs of stability control of earthen sites. At present, only using a steel tape measure to roughly measure the hole diameter and bottom depth of the anchor hole cannot meet the actual needs, and there is no special equipment to record the internal conditions of the earthen site anchor hole in real time and measure the temperature and humidity.

[0004] For the reinforcement of earthen sites, bolt anchoring is still a scientific and reliable reinforcement method, and the internal parameters of the anchor hole provide specific data basis for the quality control of the anchoring process. In order to avoid the influence of human factors caused by multiple measurements and improve the intelligence of the measurement, the equipment is required to be able to simultaneously measure the anchor hole depth, hole diameter, hole temperature and humidity, and hole photography. However, there is currently no such device in the field of earthen site anchoring reinforcement research, which urgently requires research and development work in this blank. Therefore, the development of a device that can be used to simultaneously measure the anchor hole depth, hole diameter, hole temperature and humidity, and hole photography of earthen site anchor bolt anchoring is of great significance for the applied research of earthen site anchoring reinforcement design and the quality control of the anchoring process. Summary of the invention

[0005] The purpose of the present invention is to provide a multifunctional anchor hole parameter measuring device to solve the problems that the existing anchor hole measuring device and measuring tools cannot meet actual needs and the data measured by the existing measuring tools are relatively single.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] A multifunctional anchor hole parameter measuring device comprises a measuring actuator, a transmission connection mechanism and a numerical display mechanism;

[0008] Measuring actuator, used to measure specific parameters in the anchor hole;

[0009] A transmission connection mechanism, used for driving a measuring actuator;

[0010] The numerical display mechanism is used to display various data measured by the measuring actuator.

[0011] Furthermore, the measuring actuator includes a driven shaft, a pin, a temperature, humidity and stress integrated sensor, a sleeve, a spring, a cover plate and a miniature wireless transmission camera; the other end of the pin is connected to the temperature, humidity and stress integrated sensor; the side surface of the driven shaft is slidably matched with the inner wall surface of the sleeve, a threaded hole is provided on the circumference of the sleeve, the cover plate is threadedly connected to the sleeve, and the miniature wireless transmission camera is located at the center of the cover plate; one end of the pin is a cylindrical structure and the other end is a wedge-shaped structure.

[0012] Furthermore, two pairs of mutually perpendicular radial holes are provided on the circumferential wall of the sleeve, and the cylindrical structure of the ejector pin is slidably matched with each radial hole; the spring is sleeved on the outside of the ejector pin, one end of the spring contacts the wedge-shaped surface of the ejector pin, and the other end of the spring contacts the inner wall of the sleeve, the length of the spring is slightly larger than the distance from the position where the spring contacts the ejector pin surface to the inner wall of the sleeve, and the spring is in a slightly compressed state.

[0013] Furthermore, one end of the driven shaft is in a cone shape without a pointed top, and the driven shaft contacts four inclined surfaces of the two pairs of ejector pins during axial displacement, and the axial displacement of the driven shaft pushes the ejector pins to radially displace.

[0014] Furthermore, the transmission connection mechanism includes a rod, a driving shaft, and a connecting shaft. A stepped hole is provided inside the rod, one end of the inner wall of the hole is an internally threaded hole, and an external thread is provided on the outer circumference of the sleeve. The rod and the sleeve are threadedly connected via the external thread provided on the outer circumference of the sleeve; the rod is divided into several intermediate rods, the inner wall of one end of the intermediate rod is provided with an internal thread, and the outer circumference of the other end of the intermediate rod is provided with an external thread, and two adjacent intermediate rods are connected by threads; the outer circumferences of the driven shaft, the driving shaft and the connecting shaft are all provided with external threads, the rod and the driven shaft are threadedly transmitted, the inner wall surface of the intermediate rod is slidably matched with the side surfaces of the driving shaft and the connecting shaft, and the intermediate rods and the intermediate rods, the driving shaft and the connecting shaft, and the connecting shaft and the driven shaft are threadedly connected by internal and external threads.

[0015] Furthermore, the shaft of the rod is marked with scales.

[0016] Furthermore, the numerical display mechanism includes a nut, a measuring cylinder, a rotating cylinder, and a positioning cylinder. The outer wall of the measuring cylinder is provided with a scale, and the inner wall of the measuring cylinder is provided with an internal thread, wherein an external thread is provided on the outer circumference of one end of an intermediate rod connected to the numerical display mechanism, the measuring cylinder is threadedly connected to the intermediate rod, one end of the positioning cylinder is in contact with the step on the drive shaft, and the other end is in contact with the rotating cylinder, the rotating cylinder is sleeved on the connecting shaft, and is in a set position on the drive shaft through the positioning cylinder, the drive shaft passes through the rotating cylinder, one end of the drive shaft is provided with a thread, the drive shaft is threadedly connected to the nut, and the rotating cylinder is fixed on the drive shaft between the positioning cylinder and the nut.

[0017] Furthermore, the temperature, humidity and stress integrated sensor is hemispherical, and the radius of the hemispherical shape is selected according to the hardness and softness of the rock and soil in the anchor hole so that it will not be inserted into the rock and soil during measurement, thereby meeting the aperture measurement problem under different working conditions.

[0018] Furthermore, the ejector pins are evenly distributed radially in pairs perpendicular to each other. Even if the measuring actuator is not at the center of the anchor hole, when the four ejector pins are fully extended and the top surface of the temperature, humidity and stress integrated sensor contacts the hole wall, the measuring actuator is repositioned at the center of the anchor hole, so that the data measured by the measuring cylinder is always the measured value of the inner diameter of the anchor hole, thereby avoiding the situation where the center of the measuring actuator a is not at the center of the anchor hole, causing the measuring cylinder reading to be distorted.

[0019] Furthermore, the outer wall of the measuring cylinder is provided with a scale, and the length x displayed by each grid of the scale is in direct proportion to the actual width s of the scale, and the proportional coefficient k is determined by the slope of the ejector bevel and the taper of the conical surface at the driven shaft end, and the relationship between them is x=ks;

[0020] The smaller k and x are, the higher the accuracy of the measuring cylinder is. When two pairs of perpendicular pins are in contact with each other, the radial distance between the top surfaces of one pair of sensors is taken as the lower limit of the measuring cylinder range. When the radial displacement of the pins outward reaches the limit, the radial distance between the dome surfaces of the two sensors is the upper limit of the measuring cylinder range.

[0021] Furthermore, the micro wireless transmission camera and the temperature, humidity and stress integrated sensor both use wireless methods for data transmission. The wireless integrated sensor and the wireless camera are connected to the cloud through a WIFI routing module. Through a mobile phone APP, the cloud server can be accessed in a local area network or through the Internet to query and obtain relevant data captured by the temperature, humidity and stress sensor and the micro wireless transmission camera, as well as real-time preview and retrieval of the video.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) The device is rich in functions and highly integrated. It can simultaneously measure the depth, inner diameter, temperature and humidity of the anchor hole, and video the inside of the hole. It can also measure the depth of the anchor hole at different positions and its corresponding inner diameter and the temperature and humidity parameters inside the anchor hole, and record the inside of the anchor hole by video.

[0024] (2) The device has a simple structure, is easy to disassemble and carry, and the measuring actuator, transmission connection mechanism, and numerical display mechanism all use a lot of simple threaded connections, which are easy to disassemble and replace.

[0025] (3) The device has a wide measurement range and strong applicability. Under certain conditions, if the diameter of the anchor hole exceeds the design range of the device, the ejector pins of different lengths and measuring cylinders of different ranges can be replaced to meet the needs of measuring the diameter of different anchor holes. The integrated sensor is hemispherical, and the radius of the hemispherical shape can be selected according to the soft and hard strength of the rock and soil in the anchor hole so that it will not be inserted into the rock and soil during measurement, thus meeting the problem of diameter measurement under different working conditions. The number of intermediate rods and intermediate shafts can be increased or decreased as needed to meet the problem of depth measurement of different anchor holes.

[0026] (4) The device has an automatic centering function and accurate data. It uses two pairs of mutually perpendicular radial ejectors. Even if the measuring actuator is not in the center of the anchor hole, when the four ejectors are fully extended and the top surface of the temperature, humidity and stress integrated sensor contacts the hole wall, the measuring actuator can be repositioned to the center of the anchor hole, so that the data measured by the measuring cylinder is always the measurement value of the inner diameter of the anchor hole, thereby avoiding the situation where the center of the measuring actuator is not in the center of the anchor hole, causing the measuring cylinder reading to be distorted.

[0027] (5) The device measures data continuously and with high stability. One end of the shaft is in the shape of a cone without a pointed top. During the axial displacement, the shaft contacts the two inclined surfaces of the two ejector pins. The shaft continues to move, pushing the ejector pins to move radially. This structure converts the axial displacement of the shaft into the radial displacement of the ejector pins. The measurement data is continuous and accurate, and no damage is caused to the hole wall.

[0028] (6) The reading accuracy of the device can be adjusted according to the needs of the site, and it has good versatility. The outer wall of the measuring cylinder is provided with a scale. The length x displayed on each grid of the scale is directly proportional to the actual width s of the scale. The proportional coefficient k is determined by the slope of the ejector bevel and the taper of the conical surface at the shaft end. The relationship between them is x=ks. The smaller k is, the smaller x is, and the higher the accuracy of the measuring cylinder is. When two pairs of mutually perpendicular ejectors are in contact with each other, the radial distance value of the dome surface of one pair of sensors is taken as the lower limit of the measuring cylinder range. When the ejector reaches the limit of radial displacement outward, the radial distance value of the dome surface of the two sensors is the upper limit of the measuring cylinder range.

[0029] (7) This device adopts wireless data transmission, which is intelligent and smart. The micro wireless transmission camera and the temperature, humidity and stress integrated sensor both use wireless data transmission. It has the advantages of small size, easy installation, low power consumption, long service life, high sensitivity, long transmission distance, real-time accuracy, safety and reliability, making the device itself more intelligent. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic diagram of the three-dimensional structure of the invention;

[0031] Figure 2 It is a cross-sectional schematic diagram of the invention along the central axis;

[0032] Figure 3 For invention Figure 2 The local enlarged schematic diagram of point Ⅰ in the middle;

[0033] Figure 4 For invention Figure 2 A partial enlarged schematic diagram of the middle II;

[0034] Figure 5 For invention Figure 2 A partial enlarged schematic diagram of point III in the middle;

[0035] Figure 6 This is an enlarged schematic diagram of the invented measuring cylinder;

[0036] In the figure: measuring actuator a, transmission connection mechanism b, numerical display mechanism c, driven shaft 1, sleeve 2, spring 3, ejector pin 4, temperature, humidity and stress integrated sensor 5, cover plate 6, miniature wireless transmission camera 7, rod 8, connecting shaft 9, intermediate rod 10, driving shaft 11, nut 13, positioning cylinder 14, rotating cylinder 15, measuring cylinder 16, scale 17. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0038] Example 1

[0039] In this embodiment, a multifunctional anchor hole parameter measuring device includes a measuring actuator a, a transmission connection mechanism b, and a numerical display mechanism c;

[0040] Measuring actuator a, used to measure specific parameters in the anchor hole;

[0041] Transmission connection mechanism b, used for driving the measuring actuator;

[0042] The numerical display mechanism c is used to display various data measured by the measuring actuator.

[0043] The measuring actuator a comprises a driven shaft 1, a pin 4, a temperature, humidity and stress integrated sensor 5, a sleeve 2, a spring 3, a cover plate 6 and a miniature wireless transmission camera 7; the other end of the pin 4 is connected to the temperature, humidity and stress integrated sensor 5; the side surface of the driven shaft 1 is slidably matched with the inner wall surface of the sleeve 2, a threaded hole is provided on the circumference of the sleeve 2, the cover plate 6 is threadedly connected to the sleeve 2, and the miniature wireless transmission camera 7 is located at the center of the cover plate 6; one end of the pin 4 is a cylindrical structure and the other end is a wedge-shaped structure.

[0044] The circumferential wall of the sleeve 2 is provided with two pairs of radial holes perpendicular to each other, and the cylindrical structure of the ejector pin 4 is slidably matched with each radial hole; the spring 3 is sleeved on the outside of the ejector pin 4, one end of the spring 3 contacts the wedge-shaped surface of the ejector pin 4, and the other end of the spring 3 contacts the inner wall of the sleeve 2. The length of the spring 3 is slightly larger than the distance between the position where the spring 3 contacts the ejector pin 4 and the inner wall of the sleeve 2, and the spring 3 is in a slightly compressed state.

[0045] One end of the driven shaft 1 is in a cone shape with the tip removed. The driven shaft 1 contacts the two inclined surfaces of the two pairs of ejector pins 4 during the axial displacement. The axial displacement of the driven shaft 1 pushes the ejector pins 4 to move radially. This structure converts the axial displacement of the driven shaft 1 into the radial displacement of the ejector pins 4, and the measurement data is continuous and accurate without damaging the hole wall.

[0046] The transmission connection mechanism includes a rod 8, a driving shaft 11, and a connecting shaft 9. A stepped hole is provided inside the rod 8, one end of the inner wall of the hole is an internal threaded hole, and an external thread is provided on the outer circumference of the sleeve 2. The rod 8 is threadedly connected to the sleeve 2 through the external thread provided on the outer circumference of the sleeve 2; the rod 8 is divided into several intermediate rods 10, the inner wall of one end of the intermediate rod 10 is provided with an internal thread, and the outer circumference of the other end of the intermediate rod 10 is provided with an external thread, and two adjacent intermediate rods 10 are connected by threads; the outer circumferences of the driven shaft 1, the driving shaft 11 and the connecting shaft 9 are all provided with external threads, the rod 8 and the driven shaft 1 are threadedly transmitted, the inner wall surface of the intermediate rod 10 is slidably matched with the side surfaces of the driving shaft 11 and the connecting shaft 9, the intermediate rods 10 and the intermediate rods 10, the driving shaft 11 and the connecting shaft 9, and the connecting shaft 9 and the driven shaft 1 are threadedly connected by internal and external threads; the rod body of the rod 8 is marked with a scale 17.

[0047] The numerical display mechanism c comprises a nut 13, a measuring cylinder 16, a rotating cylinder 15, and a positioning cylinder 14. The outer wall of the measuring cylinder 16 is provided with a scale, and the inner wall of the measuring cylinder 16 is provided with an internal thread. The outer circumference of one end of the intermediate rod 10 connected to the numerical display mechanism c is provided with an external thread. The measuring cylinder 16 is threadedly connected to the intermediate rod 10. One end of the positioning cylinder 14 contacts the step on the drive shaft 11, and the other end contacts the rotating cylinder 15. The rotating cylinder 15 is sleeved on the connecting shaft 9 and is in a set position on the drive shaft 11 through the positioning cylinder 14. The drive shaft 11 passes through the rotating cylinder 15. One end of the drive shaft 11 is provided with a thread. The drive shaft 11 is threadedly connected to the nut 13. The rotating cylinder 15 is located between the positioning cylinder 14 and the nut 13 and is fixed on the drive shaft 11.

[0048] Example 2

[0049] In this embodiment, the temperature, humidity and stress integrated sensor 5 is hemispherical, and the radius of the hemispherical shape is selected according to the hardness and softness of the rock and soil in the anchor hole so that it will not be inserted into the rock and soil during measurement, thereby meeting the aperture measurement problem under different working conditions.

[0050] Example 3

[0051] In this embodiment, the ejector pins 4 are evenly distributed radially and perpendicular to each other. Even if the measuring actuator a is not at the center of the anchor hole, when the four ejector pins are fully extended and in contact with the hole wall, the measuring actuator a is repositioned at the center of the anchor hole, so that the data measured by the measuring cylinder 16 is always the measured value of the inner diameter of the anchor hole, thereby avoiding the situation where the center of the measuring actuator a is not at the center of the anchor hole, causing the reading of the measuring cylinder 16 to be distorted.

[0052] Example 4

[0053] In this embodiment, the outer wall of the measuring cylinder 16 is provided with a scale 17, and the length x displayed by each grid of the scale 17 is proportional to the actual width s of the scale, and the proportional coefficient k is determined by the slope of the inclined surface of the ejector 4 and the taper of the conical surface at the end of the driven shaft 1, and the relationship between them is x=ks;

[0054] The smaller k and x are, the higher the accuracy of the measuring cylinder 16 is. When two pairs of mutually perpendicular ejector pins are in contact with each other, the radial distance between the dome surfaces of one pair of sensors is taken as the lower limit of the measuring range of the measuring cylinder 16. When the ejector pin 4 reaches the limit of radial displacement outward, the radial distance between the dome surfaces of the two sensors is the upper limit of the measuring range of the measuring cylinder 16.

[0055] Example 5

[0056] In this embodiment, the micro wireless transmission camera 7 and the temperature, humidity and stress integrated sensor 5 both use wireless methods for data transmission. The micro wireless transmission camera 7 and the temperature, humidity and stress integrated sensor 5 are connected to the cloud through a WIFI routing module. Through a mobile phone APP, the cloud server can be accessed in a local area network or through the Internet to query and obtain relevant data of the temperature, humidity and stress sensor 5, as well as to preview and retrieve the video in real time.

[0057] The operation steps of a multifunctional anchor hole parameter measuring device when in use are as follows:

[0058] 1. During the anchoring process, the anchor hole position is determined according to the design drawings. After the anchor hole is positioned, drilled and cleaned, the bottom depth and hole diameter of the anchor hole are measured on site with a steel tape measure with an accuracy of millimeters.

[0059] 2. According to the bottom depth of the anchor hole, the number of intermediate rods and connecting shafts 9 required in the measurement process is selected, and the measuring actuator and numerical display mechanism are selected according to the hole diameter, and then the measuring device is assembled as a whole.

[0060] 3. When the measuring device measures the inner diameter of the anchor hole, the measuring actuator a is inserted into the anchor hole, and then the rotating drum 15 is rotated. The rotating drum 15 drives the driving shaft 11, the connecting shaft 9 and the driven shaft 1 to rotate. Since the driving shaft 11, the connecting shaft 9 and the driven shaft 1 are all threaded with the rod 8, the driving shaft 11, the connecting shaft 9 and the driven shaft 1 will rotate and displace along the axial direction of the rod body. During the displacement of the driving shaft 11, the connecting shaft 9 and the driven shaft 1, the conical surface of the driven shaft 1 contacts the inclined surface on the ejector pin 4, and the driven shaft 1 continues to displace, pushing the ejector pin 4 to move radially outward toward the sleeve 2. When the driven shaft 1 cannot be displaced and the rotating drum 15 cannot rotate, or according to the stress data transmitted by the temperature, humidity and stress integrated sensor 5, it can be explained that the top surface of the temperature, humidity and stress integrated sensor 5 is reliably in contact with the wall surface of the anchor hole.

[0061] 4. Read the depth of the anchor hole at this position using the scale on the shaft of the intermediate rod 10 and record it.

[0062] 5. Read the inner diameter of the anchor hole at this position using the indication on the outer wall of the measuring cylinder 16 and record it.

[0063] 6. Connect the temperature, humidity and stress integrated sensor 5 and the miniature wireless transmission camera 7 to the cloud through the WIFI routing module. The mobile phone APP can access the cloud server in the local area network or through the Internet to query and obtain the relevant data of the temperature, humidity and stress integrated sensor 5, as well as preview and retrieve the video in real time. The APP can read the corresponding data at a fixed time or actively.

[0064] 7. After measuring and recording the relevant data, the drum 15 can be rotated in the opposite direction to cause the driven shaft 1 to move axially backward. Under the action of the spring 3, the ejector head moves radially inward to return to the initial position.

[0065] 8. Continue to adjust the extension length of the measuring device rod, measure the hole diameter at different depths in the anchor hole, anchor hole diameter, temperature and humidity, hole wall contact stress and in-hole video, three-dimensionally reflect the internal geometric parameters and temperature and humidity parameters of the anchor hole, and transmit the specific image conditions inside the anchor hole in real time, providing more specific scientific data for the quality control of the anchoring process.

[0066] The above description is a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A multifunctional anchor hole parameter measuring device, characterized in that : including measuring actuator, transmission connection mechanism and numerical display mechanism; Measuring actuator, used to measure specific parameters in the anchor hole; A transmission connection mechanism, used for driving a measuring actuator; A numerical display mechanism, used to display various data measured by the measuring actuator; The numerical display mechanism includes a nut, a measuring cylinder, a rotating cylinder, and a positioning cylinder. The outer wall of the measuring cylinder is provided with a scale, and the inner wall of the measuring cylinder is provided with an internal thread. The outer circumference of one end of the intermediate rod connected to the numerical display mechanism is provided with an external thread. The measuring cylinder is threadedly connected to the intermediate rod. One end of the positioning cylinder contacts the step on the drive shaft, and the other end contacts the rotating cylinder. The rotating cylinder is sleeved on the connecting shaft and is in a set position on the drive shaft through the positioning cylinder. The drive shaft passes through the rotating cylinder. One end of the drive shaft is provided with a thread. The drive shaft is threadedly connected to the nut. The rotating cylinder is fixed on the drive shaft between the positioning cylinder and the nut. The temperature, humidity and stress integrated sensor is hemispherical. The measuring actuator comprises a driven shaft and an ejector pin; one end of the driven shaft is in a cone shape without a pointed top, and the driven shaft contacts two inclined surfaces of two pairs of ejector pins during axial displacement, and the axial displacement of the driven shaft pushes the ejector pins to move radially; the other end of the ejector pin is connected to the temperature, humidity and stress integrated sensor, and one end of the ejector pin is in a cylindrical structure and the other end is in a wedge-shaped structure; The outer wall of the measuring cylinder is provided with a scale, and the length x displayed by each grid of the scale is in direct proportion to the actual width s of the scale. The proportional coefficient k is determined by the slope of the ejector bevel and the taper of the conical surface at the driven shaft end, and the relationship between them is x=ks; The smaller k and x are, the higher the accuracy of the measuring cylinder is. When two pairs of perpendicular pins are in contact with each other, the radial distance between the top surfaces of one pair of sensors is taken as the lower limit of the measuring cylinder range. When the radial displacement of the pins outward reaches the limit, the radial distance between the dome surfaces of the two sensors is the upper limit of the measuring cylinder range.

2. A multifunctional anchor hole parameter measuring device according to claim 1, characterized in that: The measuring actuator also includes a temperature, humidity and stress integrated sensor, a sleeve, a spring, a cover plate and a miniature wireless transmission camera; the side surface of the driven shaft is slidably matched with the inner wall surface of the sleeve, a threaded hole is provided on the circumference of the sleeve, the cover plate is threadedly connected to the sleeve, and the miniature wireless transmission camera is located at the center of the cover plate.

3. A multifunctional anchor hole parameter measuring device according to claim 2, characterized in that: The circumferential wall of the sleeve is provided with two pairs of radial holes perpendicular to each other, and the cylindrical structure of the ejector pin is slidably matched with each radial hole; the spring is sleeved on the outside of the ejector pin, one end of the spring contacts the wedge-shaped surface of the ejector pin, and the other end of the spring contacts the inner wall of the sleeve, the length of the spring is slightly larger than the distance between the position where the spring contacts the ejector pin surface and the inner wall of the sleeve, and the spring is in a slightly compressed state.

4. A multifunctional anchor hole parameter measuring device according to claim 1, characterized in that: The transmission connection mechanism includes a rod, a driving shaft, and a connecting shaft. A stepped hole is provided inside the rod, one end of the inner wall of the hole is an internally threaded hole, an external thread is provided on the outer circumference of the sleeve, and the rod and the sleeve are threadedly connected via the external thread provided on the outer circumference of the sleeve; the rod is divided into several intermediate rods, the inner wall of one end of the intermediate rod is provided with an internal thread, the outer circumference of the other end of the intermediate rod is provided with an external thread, and two adjacent intermediate rods are connected by threads; the outer circumferences of the driven shaft, the driving shaft and the connecting shaft are all provided with external threads, the rod and the driven shaft, the driving shaft and the connecting shaft are all threadedly connected, the intermediate rods and the intermediate rods, the driving shaft and the connecting shaft, and the connecting shaft and the driven shaft are threadedly connected by internal and external threads.

5. A multifunctional anchor hole parameter measuring device according to claim 4, characterized in that: The shaft of the rod is marked with scales.

6. A multifunctional anchor hole parameter measuring device according to claim 1, characterized in that: The ejector pins are evenly distributed radially and perpendicular to each other. Even if the measuring actuator is not in the center of the anchor hole, when the four ejector pins are fully extended and the top surface of the temperature, humidity and stress integrated sensor contacts the hole wall, the measuring actuator is repositioned in the center of the anchor hole, so that the data measured by the measuring cylinder is always the measurement value of the inner diameter of the anchor hole.

7. A multifunctional anchor hole parameter measuring device according to claim 2, characterized in that: The micro wireless transmission camera and the temperature, humidity and stress integrated sensor both use wireless methods for data transmission. The micro wireless transmission camera and the temperature, humidity and stress integrated sensor are connected to the cloud through a WIFI routing module. Through a mobile phone APP, the cloud server can be accessed in a local area network or through the Internet to query and obtain relevant data of the temperature, humidity and stress sensor, as well as to preview and retrieve the video in real time.

Images