Measuring equipment for engineering cost

Abstract

The invention relates to the technical field of engineering measurement, in particular to engineering cost measuring equipment, which comprises a tripod, a measuring instrument body, a mounting frame and an annular bag, and is characterized in that the measuring instrument body is arranged at the top of the tripod; the mounting rack is arranged on the measuring instrument body; the annular bag is arranged on the mounting frame and sleeves the periphery of the measuring instrument body, a sealed cavity is formed between the annular bag and the mounting frame, and the sealed cavity is filled with gas and liquid. When the equipment for measuring the construction cost topples over in any direction under the action of external force, liquid can be gathered into one side, facing the toppling direction of the equipment for measuring the construction cost, in the annular bag under the action of gravity; the annular bag can quickly absorb impact energy under the combined action of liquid and gas in the annular bag, so that the annular bag can stably and consistently play a buffering protection role, and the measurement precision is ensured while reliable protection is provided for precise parts in the measurement instrument body.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering surveying, and particularly to a measuring device for project cost. Background Art

[0002] Project cost, as a key link in the management of construction project, runs through all stages of the project. Its core lies in determining the economic investment of the project through accurate engineering measurement calculation and in-depth analysis, fully considering market conditions and cost factors. In this complex process, accurate measurement of the construction site is crucial. As a common and important measuring device, the total station plays an indispensable role. It can efficiently and accurately obtain various dimensional data of the construction site, providing a basic support for project cost calculation.

[0003] In related technologies, for example, Chinese Patent CN116202497B discloses an all-weather total station for spatial planning, which includes a first connecting rod and a protective ring made of elastic material. The first connecting rod and the protective ring are coaxially arranged, and a first telescopic rod is slidably connected thereto. The first connecting rod is internally provided with non-Newtonian fluid. The first connecting rod is fixedly connected with three second connecting rods distributed in a circumferential array. The second connecting rods extend along the radial direction of the protective ring, and the second connecting rods are internally provided with non-Newtonian fluid. A second telescopic rod is slidably connected to each second connecting rod. When the total station falls due to external force, the protective ring first protects the total station, and then the first telescopic rod or the second telescopic rod contacts the ground, forcing the first telescopic rod to slide into the first connecting rod or the second telescopic rod to slide into the second connecting rod, so that the first telescopic rod or the second telescopic rod contacts the non-Newtonian fluid to achieve the purpose of shock absorption.

[0004] However, there are also some problems in the use of the above-mentioned all-weather total station for spatial planning: Since the direction of the external force applied to the total station is random, it directly leads to the unpredictable tipping direction of the total station. When the total station falls along the axial direction of the protective ring, the protective ring contacts the ground circumferentially, and the first telescopic rod mainly plays a shock-absorbing role. When the total station falls along the radial direction of the protective ring, a part of the protective ring contacts the ground, and the second telescopic rod mainly plays a shock-absorbing role. Under these two different tipping directions, there are significant differences in the shock absorption and buffering effects. This difference makes it impossible to ensure that stable and consistent buffer protection can be provided to the total station in any tipping direction. More seriously, in some tipping directions, there is a high probability of more severe secondary impacts, which will undoubtedly cause potential damage to the internal precision components of the total station, affecting its measurement accuracy and service life, and ultimately having an adverse impact on the accuracy of data acquisition in project cost calculation. Summary of the Invention

[0005] Based on this, it is necessary to provide a measuring device for project cost in view of the problem of insufficient protection existing in the current project cost measurement process.

[0006] The above object is achieved by the following technical solutions: A measuring device for project cost, the measuring device for project cost includes: A tripod; A measuring instrument body, arranged on the top of the tripod; A mounting rack, arranged on the measuring instrument body; An annular bladder, arranged on the mounting rack and sleeved on the outer periphery of the measuring instrument body. A sealed chamber is formed between the annular bladder and the mounting rack, and the sealed chamber is filled with gas and liquid.

[0007] Further, the tripod has a base, three rotating legs, telescopic legs, limit sleeves, and locking rods. The three rotating legs are arranged circumferentially at the bottom of the base. The top end of the rotating leg is hinged to the base, and the bottom end is suspended. The top end of the telescopic leg is arranged on the rotating leg and forms a sliding fit with the rotating leg. The bottom end of the telescopic leg supports on the ground during use. The limit sleeve is arranged on the rotating leg and sleeved on the outer periphery of the telescopic leg at the same time. The locking rod is arranged on the limit sleeve and can slide along the radial direction of the limit sleeve and can form a locking fit with the telescopic leg.

[0008] Further, the measuring device for project cost further includes a controller, an adjusting mechanism, and at least three pressure sensors. All the pressure sensors are arranged on the mounting rack, arranged circumferentially along the annular bladder, and are all configured to be able to sense the pressure of the liquid in the sealed chamber and are all electrically connected to the controller. The adjusting mechanism is configured to be able to adjust the position of the locking rod. The controller is configured to be able to calculate the inclination angle of the measuring device for project cost according to the liquid pressure sensed by the pressure sensors. Furthermore, when the inclination angle of the measuring device for project cost is greater than a preset value, a signal is sent to the adjusting mechanism to unlock the locking fit between the telescopic leg that supports the measuring device for project cost as a fulcrum and the locking rod thereon.

[0009] Further, the adjusting mechanism includes a power supply, three elastic members, three magnets, and three electromagnetic coils. The power supply is configured to energize the electromagnetic coils; the controller is configured to control the power supply; the elastic members are disposed between the limit sleeve and the locking rod, and under the action of the elastic members, the locking rod has a tendency to move inward; the magnets are fixedly disposed on the locking rod; the electromagnetic coils are disposed on the limit sleeve and are oppositely disposed relative to the elastic members. When the electromagnetic coils are energized, they are configured to generate the same magnetic poles as the magnets.

[0010] Further, the elastic member is a compression spring.

[0011] Further, the pressure sensor is electrically connected to the measuring instrument body and is configured to send a pressure signal to the measuring instrument body to be used for judging the levelness of the measuring instrument body.

[0012] Further, the controller is further configured to send a signal to the adjusting mechanism when the inclination angle of the construction cost measuring device is greater than the preset value, so as to simultaneously unlock the locking fit between the telescopic leg that does not support the construction cost measuring device as a fulcrum and the locking rod thereon.

[0013] Further, the construction cost measuring device further includes three counterweights, and the three counterweights are respectively disposed on the three telescopic legs.

[0014] Further, the measuring instrument body includes a lens, and the lens can rotate around a horizontal axis; the controller is further configured to calculate the tipping direction of the construction cost measuring device according to the liquid pressure sensed by the pressure sensor, and then when the construction cost measuring device tips over, it can control the rotation of the lens so that the lens faces away from the tipping direction of the construction cost measuring device.

[0015] Further, the number of the annular sacs is two, and they are arranged at intervals in the vertical direction.

[0016] The beneficial effects of the present invention are as follows: During the use of the construction cost measuring device involved in the present invention, when the construction cost measuring device tips over in any direction due to external forces, under the action of gravity, the liquid converges to one side of the annular sac facing the tipping direction of the construction cost measuring device. Then, when the annular sac contacts the ground, the annular sac can quickly absorb the impact energy under the combined action of the internal liquid and gas, so as to stably and uniformly play a buffering and protecting role and provide reliable protection for the internal precision components of the measuring instrument body.

[0017] Furthermore, by providing that the measurement device for project cost also includes a controller, an adjusting mechanism, and at least three pressure sensors, when the measurement device for project cost is tilted in any direction due to an external force, the liquid distribution becomes uneven under the action of gravity, causing the liquid pressures sensed by the three pressure sensors to be different. As a result, the controller can calculate the tilt angle of the measurement device for project cost and send a signal to the adjusting mechanism to unlock the locking fit between the telescopic leg that supports the measurement device for project cost as a fulcrum and the locking rod thereon. Then, during the tilting process of the measurement device for project cost, a part of the gravitational potential energy of the measuring instrument body is converted into the energy to drive the shortening of the lengths of the rotating leg and the telescopic leg that support the measurement device for project cost as a fulcrum. Thus, the kinetic energy of the measurement device for project cost when it hits the ground can be reduced, effectively reducing the impact force suffered by the measurement device for project cost when it hits the ground and further reducing the risk of serious damage to the measurement device for project cost due to tilting.

[0018] Furthermore, by providing that the pressure sensors are electrically connected to the measuring instrument body and configured to be able to send pressure signals to the measuring instrument body, when leveling the measuring instrument body, targeted level adjustment can be carried out based on the similarities and differences between the liquid pressures sensed by multiple pressure sensors to ensure that the measuring instrument body is in an accurate horizontal working state, thereby providing a reliable basis for subsequent engineering measurement work.

[0019] Furthermore, by providing that the controller is also configured to be able to send a signal to the adjusting mechanism when the measurement device for project cost is tilted to simultaneously unlock the locking fit between the telescopic leg that does not support the measurement device for project cost as a fulcrum and the locking rod thereon, so that the telescopic leg that does not support the measurement device for project cost as a fulcrum can extend under its own weight, thereby hindering the tilting of the measurement device for project cost. Thus, the kinetic energy of the measurement device for project cost when it hits the ground can be further reduced, improving the protection effect on the measuring instrument body and its internal precision components. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a three-dimensional structural schematic diagram of the measurement device for project cost provided by an embodiment of the present invention; Figure 2 is a front-view structural schematic diagram of the measurement device for project cost provided by an embodiment of the present invention; Figure 3 is Figure 2 a partial enlarged structural schematic diagram at A in Figure 4 is a sectional structural schematic diagram of the measurement device for project cost provided by an embodiment of the present invention when it is placed vertically; Figure 5 is Figure 4A schematic diagram of the partially enlarged structure at B in the middle; Figure 6 for Figure 4 A schematic diagram of the partially enlarged structure at C in the middle; Figure 7 A schematic diagram of a cross-sectional structure of a project cost measurement device provided by an embodiment of the present invention when it is tilted; Figure 8 for Figure 7 The schematic diagram of the local enlarged structure at D in the middle; Figure 9 A schematic diagram of the three-dimensional structure of the mounting frame and the annular bag of the engineering cost measurement equipment provided by an embodiment of the present invention during assembly.

[0021] in: 1. Tripod; 101. Base; 102. Rotating legs; 103. Telescopic legs; 104. Limiting sleeve; 1041. Bracket; 105. Locking rod; 2. Measuring instrument body; 201. Lens; 3. Mounting frame; 301. First mounting ring; 302. Second mounting ring; 303. Support rod; 304. Protrusion; 305. Third mounting ring; 306. Mounting shell; 4. Annular capsule; 501, power supply; 502, compression spring; 503, magnet; 504, electromagnetic coil; 6. Pressure sensor; 7. Counterweight. DETAILED DESCRIPTION

[0022] 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 through embodiments and in conjunction with the accompanying drawings. 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.

[0023] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned herein, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0024] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature has a lower horizontal height than the second feature.

[0025] As Figures 1 to 9 shown, the measuring device for project cost provided by the embodiment of the present invention is provided to include a tripod 1, a measuring instrument body 2, a mounting bracket 3 and an annular bladder 4, wherein the measuring instrument body 2 is arranged on the top of the tripod 1; the mounting bracket 3 is arranged on the measuring instrument body 2; the annular bladder 4 is arranged on the mounting bracket 3 and sleeved on the outer periphery of the measuring instrument body 2, and a sealed chamber is formed between the annular bladder 4 and the mounting bracket 3, and the sealed chamber is filled with gas and liquid.

[0026] Specifically in this embodiment, the cross-sectional shape of the annular bladder 4 is set to be U-shaped and the opening faces inwards; the mounting bracket 3 is provided with a first mounting ring 301, and the first mounting ring 301 is sleeved on the outer periphery of the measuring instrument body 2 during installation. The cross-sectional shape of the first mounting ring 301 is set to be U-shaped and the opening faces horizontally outwards. The first mounting ring 301 is coaxially and sealingly inserted into the inner periphery of the annular bladder 4 during installation to ensure that a sealed chamber can be formed; to facilitate the installation of the mounting bracket 3 onto the measuring instrument body 2, the mounting bracket 3 is further provided with a second mounting ring 302, a plurality of support rods 303 and a plurality of protrusions 304. The second mounting ring 302 is located below the first mounting ring 301 and is coaxially arranged with the second mounting ring 302. The support rods 303 extend along the direction parallel to the axis of the first mounting ring 301, and the plurality of support rods 303 are arranged circumferentially. Taking one of the support rods 303 as an example, the top end of this support rod 303 is fixedly arranged at the bottom of the first mounting ring 301, and the bottom end penetrates through the second mounting ring 302 and is suspended to ensure that the first mounting ring 301 and the second mounting ring 302 can be connected together. The plurality of protrusions 304 are all arranged on the inner peripheral wall of the second mounting ring 302 and are arranged circumferentially. The protrusions 304 are fixed to the measuring instrument body 2 by bolts during installation.

[0027] Optionally, the annular bladder 4 can be made of rubber material. Rubber has good flexibility and elasticity, which enables the annular bladder 4 to effectively absorb and disperse energy through its own deformation when facing various external force impacts.

[0028] Optionally, the number of the support rods 303 can be set to six and they are evenly arranged circumferentially.

[0029] Optionally, the number of the protrusions 304 can be set to three and be evenly arranged circumferentially.

[0030] Optionally, the tripod 1 can be set to have a base 101 and three support legs. The three support legs are evenly arranged circumferentially at the bottom of the base 101. When installed, the top ends of the support legs are hinged to the base 101, and the bottom ends support on the ground during use.

[0031] During normal measurement, as Figure 2 shown, the measuring device for project cost is vertically arranged. As Figure 5 shown, the liquid in the sealed chamber is evenly distributed at the bottom of the sealed chamber.

[0032] During use, when the measuring device for project cost is tilted in any direction due to external forces (such as wind, foreign object impact, etc.), based on the principle of gravity, the liquid in the sealed chamber will quickly converge to one side of the annular bladder 4 in the direction of the device tilt. During this process, the fluidity of the liquid enables it to quickly respond according to the actual direction of the device tilt, while the gas, relying on its compressibility, is evenly distributed in the remaining space in the chamber. Taking the right tilt of the measuring device for project cost as an example, as Figure 8 shown, the liquid converges to the right side, presenting a state of less on the left and more on the right.

[0033] Subsequently, when the annular bladder 4 comes into contact with the ground instantaneously, under the combined action of the gravity buffering of the internal liquid and the elastic buffering of the gas in the annular bladder 4, it can effectively absorb the impact energy from the ground; the high-density characteristic of the liquid enables it to consume a large amount of impact energy through its own displacement and deformation when bearing the impact force. At the same time, the compressibility of the gas further buffers and disperses the impact force. The two cooperate synergistically to ensure that no matter in which direction the measuring device for project cost is tilted, the annular bladder 4 can stably and consistently play a buffering and protecting role, thereby providing reliable protection for the internal precision components of the measuring instrument body 2, ensuring the measurement accuracy and service life of the measuring device in a complex use environment, and providing a solid guarantee for data acquisition in project cost calculation.

[0034] Optionally, the gas can be set to use nitrogen or air. When using air, to avoid possible corrosion or other adverse effects on the components inside the sealed chamber due to the components such as oxygen and water vapor contained in the air during long-term use, the air can be pretreated such as drying to improve its stability and applicability.

[0035] Optionally, the liquid can be set to use silicone oil, water or hydraulic oil. When using water, due to the low boiling point of water, the influence of the environmental temperature needs to be considered, and corresponding heat preservation or anti-freezing measures should be taken to ensure its use performance.

[0036] In some embodiments, to adapt to a complex measurement environment, the tripod 1 is provided with a base 101, and three rotating legs 102, telescopic legs 103, limit sleeves 104, and locking rods 105, all in number. The three rotating legs 102 are arranged circumferentially at the bottom of the base 101. The top end of the rotating leg 102 is hinged to the base 101, and the bottom end is suspended. The top end of the telescopic leg 103 is arranged on the rotating leg 102 and forms a sliding fit with the rotating leg 102. The bottom end of the telescopic leg 103 supports on the ground during use. The limit sleeve 104 is arranged on the rotating leg 102 and simultaneously sleeved on the outer periphery of the telescopic leg 103. The locking rod 105 is arranged on the limit sleeve 104 and can slide along the radial direction of the limit sleeve 104 and can form a locking fit with the telescopic leg 103.

[0037] Specifically in this embodiment, the measuring instrument body 2 is arranged on the top of the base 101 during installation. The rotating leg 102 is arranged in a strip structure. The telescopic leg 103 is arranged in a strip structure and is collinear with the rotating leg 102 to ensure that the measuring instrument body 2 can be supported along the same straight line direction. The limit sleeve 104 is arranged at the bottom end of the rotating leg 102 to ensure that the total length of the rotating leg 102 and the telescopic leg 103 can be adjusted within a large range, improving applicability. The locking rod 105 extends along the radial direction of the limit sleeve 104 and is arranged outside the limit sleeve 104 to ensure convenience during adjustment.

[0038] Optionally, the locking rod 105 can be arranged to be threadedly inserted into the limit sleeve 104, penetrate through the limit sleeve 104, and can frictionally abut against the telescopic leg 103 during use to ensure that a locking fit can be formed with the telescopic leg 103.

[0039] In a further embodiment, during the tipping process of an existing total station, it usually makes a circular motion with the support leg as the fulcrum. During this motion, its height in the vertical direction will first rise and then fall. When the total station makes a circular motion and rises with the fulcrum support leg as the center, according to the principle of mutual conversion of kinetic energy and gravitational potential energy, its kinetic energy will gradually be converted into gravitational potential energy, resulting in a gradual decrease in speed. However, as the total station continues to make a circular motion and fall back, the stored gravitational potential energy will be reconverted into kinetic energy again. Since more gravitational potential energy has been accumulated during the previous height rise, the converted kinetic energy will be greater during the fall back process. This means that when the total station hits the ground, it will carry greater kinetic energy. According to the principles of physics, the greater the kinetic energy, the greater the impact force generated when hitting the ground. And the internal structure of the total station is precise, and the tolerance of each component to the impact force is limited. When such a large impact force acts on the total station, its internal components are extremely vulnerable to damage, thus greatly increasing the damage probability of the total station, seriously affecting its normal use and measurement accuracy, and bringing many inconveniences and potential risks to the engineering cost measurement work.

[0040] To solve the above problems, the measuring device for project cost is further provided with a controller, an adjusting mechanism, and at least three pressure sensors 6. All the pressure sensors 6 are arranged on the mounting frame 3 and are arranged circumferentially along the annular bladder 4, and are all configured to be able to sense the pressure of the liquid in the sealed chamber, and are all electrically connected to the controller; the adjusting mechanism is configured to be able to adjust the position of the locking rod 105; the controller is configured to be able to calculate the inclination angle of the measuring device for project cost according to the liquid pressure sensed by the pressure sensors 6, and then when the inclination angle of the measuring device for project cost is greater than a preset value, send a signal to the adjusting mechanism to unlock the locking cooperation between the telescopic leg 103 that serves as a fulcrum to support the measuring device for project cost and the locking rod 105 thereon.

[0041] Specifically in this embodiment, to facilitate the installation of the pressure sensors 6, the mounting frame 3 is further provided with a third mounting ring 305. The third mounting ring 305 is fixedly sleeved on all the support rods 303 at the same time and is arranged close to the first mounting ring 301. When installing, the plurality of pressure sensors 6 are arranged circumferentially on the third mounting ring 305, and the sensing ends penetrate the lower end surface of the first mounting ring 301 and are inserted into the liquid to ensure that the pressure of the liquid can be sensed in real time; when the pressure sensors 6 are connected, they are connected to the controller through signal lines to ensure that the liquid pressure information can be transmitted to the controller.

[0042] Optionally, the pressure sensor 6 can be a strain gauge pressure sensor, a piezoresistive pressure sensor, a capacitive pressure sensor, a piezoelectric pressure sensor, or a Hall pressure sensor.

[0043] Optionally, the controller can be integrated inside the measuring instrument body 2.

[0044] During the use process, taking the number of pressure sensors 6 being three as an example for detailed description; when the measuring device for project cost is toppled in any direction due to external forces such as strong wind or foreign object impact, based on the basic principle of the action of gravity, the liquid originally evenly distributed in the sealed chamber will quickly converge to one side of the annular bladder 4 towards the direction of the device toppling in a very short time; due to this non-uniform distribution characteristic of the liquid, there will be a significant difference in the liquid pressures sensed by the three pressure sensors 6 arranged circumferentially along the annular bladder 4; each pressure sensor 6 has a high-sensitivity data acquisition ability and can transmit the detected real-time pressure signal to the controller in the form of an electrical signal through a stable signal line in real time.

[0045] As the core of the intelligent regulation of the entire device, the controller is built-in with an extremely precise and extensively tested and optimized algorithm program. This program can, based on the different pressure values feedback by three pressure sensors 6, use the complex and accurate trigonometric calculation principle to deeply analyze and calculate these data, so as to accurately calculate the current tilt angle of the measurement device for project cost in milliseconds. To ensure the safety of the device, a safety threshold is preset in the controller. This safety threshold is the preset value. Once the controller determines through calculation that the tilt angle of the device exceeds this preset safety threshold, it will immediately send a specific and unique control signal to the adjustment mechanism through the internal communication mechanism.

[0046] As the execution unit, the adjustment mechanism has the characteristics of rapid response and precise execution. When it receives the signal sent by the controller, it will act quickly and precisely unlock the originally tight locking fit between the telescopic leg 103 that supports the measurement device for project cost as the fulcrum and the locking rod 105 thereon.

[0047] During the dynamic process of the measurement device for project cost tipping over, part of the gravitational potential energy generated by the gravity of the measuring instrument body 2 itself will be cleverly converted into the energy that drives the rotational leg 102 and the telescopic leg 103 that support the measurement device for project cost as the fulcrum to shorten in length. Specifically, as the device continues to tilt, gravity will decompose a component force that acts on the rotational leg 102 and the telescopic leg 103. Under the continuous action of this component force, the total length of the rotational leg 102 and the telescopic leg 103 can adaptively shorten according to the tilt degree of the device.

[0048] Since the total length of the rotational leg 102 and the telescopic leg 103 as the fulcrum decreases, the overall center of gravity height of the device decreases accordingly. According to the calculation formula of gravitational potential energy Ep = mgh (where Ep is gravitational potential energy, m is the mass of the device, g is the acceleration due to gravity, and h is the center of gravity height), it can be known that when the mass m of the device and the acceleration due to gravity g remain unchanged, the decrease in the center of gravity height h will cause the gravitational potential energy Ep of the device to decrease. When the device collides with the ground, according to the law of conservation of energy, the decrease in gravitational potential energy means that the energy converted into kinetic energy also decreases correspondingly, that is, the kinetic energy of the device when it collides with the ground decreases. And because kinetic energy is closely related to the impact force, the smaller the kinetic energy, the smaller the impact force generated when hitting the ground, thus effectively reducing the risk of serious damage to the measurement device for project cost due to tipping over.

[0049] It can be understood that when calculating the current tilt angle of the measurement device for project cost, in addition to using the algorithm based on trigonometric functions, it can also be set to calculate through the least squares fitting algorithm or the Kalman filter algorithm.

[0050] Further, the adjusting mechanism is configured to include a power source 501, three elastic members, magnets 503, and electromagnetic coils 504. The power source 501 is configured to be able to supply power to the electromagnetic coils 504; the controller is configured to be able to control the power supply of the power source 501; the elastic members are arranged between the limiting sleeve 104 and the locking rod 105, and under the action of the elastic members, the locking rod 105 has a tendency to move inward; the magnets 503 are fixedly arranged on the locking rod 105; the electromagnetic coils 504 are arranged on the limiting sleeve 104 and are arranged opposite to the elastic members. When the electromagnetic coils 504 are energized, they are configured to be able to generate the same magnetic poles as the magnets 503.

[0051] Specifically in this embodiment, for the convenience of installing the power source 501, the mounting bracket 3 is further provided with a mounting shell 306. The mounting shell 306 is arranged as an annular shell structure and is fixed to the third mounting ring 305 by bolts during installation. The power source 501 is inserted into the mounting shell 306 during installation; the elastic member can be arranged as a compression spring 502; for the convenience of installing the compression spring 502, the tripod 1 is further provided with a bracket 1041. The bracket 1041 is arranged as an E-shaped structure. The cantilevers at both ends of the bracket 1041 are vertically arranged on the outer peripheral wall of the limiting sleeve 104, and the cantilever in the middle of the bracket 1041 is arranged in a suspended manner. The compression spring 502 is sleeved on the cantilever in the middle of the bracket 1041 during installation, and the outer end is arranged on the bracket 1041; the adjusting rod is slidably sleeved on the cantilever in the middle of the bracket 1041 during installation; the inner end of the compression spring 502 is arranged on the adjusting rod during installation; the magnet 503 is arranged as an annular structure and is sleeved on the adjusting rod and is located between the adjusting rod and the limiting sleeve 104.

[0052] Initially, the power source 501 does not supply power to the electromagnetic coils 504. Under the action of the compression spring 502, the locking rod 105 abuts against the telescopic leg 103 to ensure that the total length of the rotating leg 102 and the telescopic leg 103 can be locked, guaranteeing the stability of the measuring instrument body 2 during measurement.

[0053] During the use process, when the inclination angle of the measuring device for engineering cost is greater than the preset value, the controller sends a signal to the power source 501; after receiving the signal from the controller, the power source 501 responds quickly and immediately supplies power to the electromagnetic coils 504. After the electromagnetic coils 504 are energized, a magnetic field will be generated according to the principle of electromagnetic induction, and the magnetic poles generated by this magnetic field are the same as those of the magnets 503 arranged near the locking rod 105. According to the principle of repulsion between like magnetic poles, under the action of the magnetic force, the locking rod 105 receives a force in a direction away from the telescopic leg 103; with the continuous action of the magnetic force, the locking rod 105 gradually overcomes the elastic resistance of the compression spring 502 and moves away from the telescopic leg 103, thereby unlocking the originally tight locking fit between the telescopic leg 103 that serves as a fulcrum to support the measuring device for engineering cost and the locking rod 105 thereon.

[0054] Optionally, the power supply 501 may also be configured to be integrated inside the measuring instrument body 2 .

[0055] In other embodiments, in order to improve the accuracy of leveling the measuring instrument body 2, the pressure sensor 6 is electrically connected to the measuring instrument body 2 and configured to send a pressure signal to the measuring instrument body 2 to determine the levelness of the measuring instrument body 2.

[0056] During use, when the measuring instrument body 2 is in the initial placement state, if the measuring instrument body 2 is in an ideal horizontal position, the liquid in the sealed chamber will be evenly distributed throughout the chamber under the action of gravity. At this time, the liquid pressures sensed by each pressure sensor 6 are basically the same. Each pressure sensor 6 can accurately convert the detected pressure information into an electrical signal form, and send a pressure signal to the measuring instrument body 2 in real time and accurately through a stable electrical connection line.

[0057] An advanced and precise signal analysis and processing system is integrated inside the measuring instrument body 2; after receiving the pressure signals from multiple pressure sensors 6, the system will immediately perform synchronous comparison and in-depth analysis on these signals; the system pre-sets a standard value range for the pressure signal under an ideal horizontal state; when the measuring instrument body 2 deviates horizontally, the liquid in the sealed chamber will be displaced due to gravity, causing the liquid pressure borne by the pressure sensors 6 at different positions to change; this pressure change will be intuitively reflected in the pressure signal sent by the pressure sensor 6 to the measuring instrument body 2, resulting in a difference between the pressure signals of each pressure sensor 6; the signal processing system of the measuring instrument body 2 can keenly capture these signal differences, and based on the built-in complex algorithm, accurately calculate the degree of inclination of the measuring instrument body 2 in all directions.

[0058] For example, if the signal value of the pressure sensor 6 on one side is significantly higher than that of other sensors, the measuring instrument body 2 can determine through analysis that there is a downward tilting trend on that side; based on this accurate judgment, the measuring instrument body 2 can feedback detailed horizontal deviation information to the operator through the internal display device or the communication interface with the external control terminal; the operator can perform targeted horizontal adjustment operations on the measuring instrument body 2 based on this information. Through this mechanism of close cooperation between the pressure sensor 6 and the measuring instrument body 2, the accuracy of the leveling of the measuring instrument body 2 can be greatly improved, providing a more reliable foundation for subsequent engineering measurement work, effectively ensuring the accuracy of the measurement data, and thus improving the accuracy and reliability of engineering cost calculation.

[0059] In other embodiments, to further reduce the impact force on the ground when the measuring device for project cost is impacted, the controller is configured to send a signal to the adjustment mechanism when the tilt angle of the measuring device for project cost is greater than a preset value, so as to simultaneously unlock the locking cooperation between the telescopic leg 103 that does not support the measuring device for project cost as a fulcrum and the locking rod 105 thereon.

[0060] During use, after the unlocking action is completed, the telescopic leg 103 that does not support as a fulcrum and the rotating leg 102 connected thereto enter the process of adaptive adjustment under the action of their own gravity. Specifically, the rotating leg 102 rotates around its hinge point with the base 101, and at the same time, the telescopic leg 103 gradually extends under the action of its own gravity, so that the total length of the telescopic leg 103 and the rotating leg 102 that do not support the measuring device for project cost as a fulcrum is increased.

[0061] This increase in the total length has several important significances: on the one hand, it can effectively expand the support area of the device during the tipping process, enhance the friction between the device and the ground, thereby reducing the risk of the device further rolling over or suffering more serious damage; on the other hand, by changing the overall center of gravity position of the device and the mechanical distribution of the support structure, it can play a certain buffering and dispersing role in the impact force when the device tips, further protecting the measuring instrument body 2 and its internal precision components, ensuring that the measuring device can still maintain a certain degree of stability and integrity in extreme cases, providing a reliable guarantee for subsequent engineering measurement work, and minimizing the potential negative impact of the device tipping on the accuracy of the project cost calculation data.

[0062] In a further embodiment, to improve both the support stability of the tripod 1 for the measuring instrument body 2 and the weakening of the impact force suffered by the telescopic leg 103 that does not support as a fulcrum and the rotating leg 102 connected thereto when the device tips, the measuring device for project cost is further provided with three counterweights 7, and the three counterweights 7 are respectively arranged on the three telescopic legs 103.

[0063] Specifically in this embodiment, the counterweight 7 is arranged inside the telescopic leg 103 and close to the bottom.

[0064] During use, when the device is operating normally, that is, when the measuring instrument body 2 is in a stable measurement state, the three counterweights 7 are distributed on the three telescopic legs 103 of the tripod 1. By increasing the overall mass of the tripod 1 and changing the position of the center of gravity, the support stability of the tripod 1 for the measuring instrument body 2 is greatly enhanced; according to the principle that the lower the center of gravity and the larger the support surface, the more stable the object, the counterweights 7 lower the center of gravity of the tripod 1 and make the mass distribution more uniform in the horizontal direction, effectively resisting the device shaking that may be caused by external disturbances (such as gentle breeze, ground vibration, etc.), providing a more stable support foundation for the measuring instrument body 2, and ensuring the accuracy and reliability of the measurement process.

[0065] When the device is toppled due to accidental external forces (such as strong wind, foreign object impact, etc.), the counterweights 7 on the telescopic legs 103 that are not used as fulcrums and the rotating legs 102 connected thereto play a crucial role; at the moment when the device topples, due to their large mass, these counterweights 7 will generate a large inertial force; according to the momentum theorem Ft = △mv (where F is the acting force, t is the acting time, △m is the mass change, and v is the velocity change), when the velocity change amount △v of the device toppling is certain, the large mass m of the counterweights 7 enables a large acting force F to be generated in a very short time t; this acting force is opposite to the direction of the device toppling, effectively weakening the impact force suffered by the device when toppling.

[0066] For example, when the device topples to one side, the inertial force generated by the counterweights 7 on the telescopic legs 103 and the rotating legs 102 that are not used as fulcrums on the other side can partially offset the impact force generated by the device toppling, slow down the toppling speed of the device, reduce the kinetic energy when the device collides with the ground, thereby reducing the risk of serious damage to the device due to toppling; at the same time, the counterweights 7 on the other two sides will also indirectly disperse and buffer the impact force when the device topples by changing the path of the overall center of gravity transfer of the device, further improving the weakening effect of the impact force by the telescopic legs 103 that are not used as fulcrums and the rotating legs 102 connected thereto, providing more comprehensive and reliable protection for the measuring instrument body 2, ensuring the integrity of its internal precision components, maintaining the high-precision measurement performance of the device, and thus ensuring the accuracy and stability of data acquisition in the calculation of project costs.

[0067] In other embodiments, when the total station is tilted, since the lens 201 is a relatively fragile and crucial part of the total station, compared with other structures, it is more likely to be damaged due to vibration or collision with ground debris; to protect the lens 201, it is set that the lens 201 can rotate around the horizontal axis; the controller is also configured to be able to calculate the tilting direction of the measuring device for engineering cost according to the liquid pressure sensed by the pressure sensor 6, and then when the measuring device for engineering cost is tilted, it can control the rotation of the lens 201 so that the lens 201 faces away from the tilting direction of the measuring device for engineering cost.

[0068] Specifically in this embodiment, to provide the driving force for the lens 201 to rotate around the horizontal axis, the measuring instrument body 2 is set to further include a driving motor. When installed, the driving motor is inserted into the measuring instrument body 2, and the motor shaft is arranged in the horizontal direction and is arranged on the lens 201 to ensure that it can drive the lens 201 to rotate around the horizontal axis.

[0069] During use, when the measuring device for engineering cost starts to tilt due to external force, the pressure sensor 6 will quickly sense the pressure change caused by the uneven distribution of the liquid in the sealed chamber due to gravity, and transmit these pressure signals to the controller in real time. Based on these pressure signals, through complex trigonometric calculation principles and the pre-established corresponding model between pressure and tilting direction, the controller can accurately determine the tilting direction of the device within a very short time.

[0070] Once the controller determines that the measuring device for engineering cost is tilted and determines the tilting direction, it will immediately send a specific control signal to the driving motor according to the preset control strategy; after receiving the signal, the driving motor responds quickly and drives the lens 201 to rotate around the horizontal axis; the rotation direction and angle are precisely calculated and controlled so that the lens 201 can quickly face away from the tilting direction of the measuring device for engineering cost; in this way, during the tilting process of the device, the lens 201 can be maximally protected from direct impact from the ground or collision with ground debris, thus effectively reducing the risk of damage to the lens 201 due to tilting.

[0071] In other embodiments, to further improve the buffer protection effect of the measuring device for engineering cost when dealing with tilting situations, the number of the annular sacs 4 is set to two, and they are arranged at intervals in the vertical direction.

[0072] Specifically in this embodiment, to facilitate the installation of the two annular sacs 4, the mounting frame 3 is set to have two first mounting rings 301, and the two first mounting rings 301 are respectively arranged at both ends of the support rod 303. In this way, each first mounting ring 301 can serve as the installation base for the corresponding annular sac 4, so as to form upper and lower sealed chambers.

[0073] When the equipment is in normal use, the gas and liquid in the two sealed chambers are in a relatively stable state; when the equipment topples due to external force, the liquid in the two sealed chambers will quickly gather to the side of the annular capsule 4 in the direction of the equipment tipping under the action of gravity, and the liquid in the upper annular capsule 4 and the liquid in the lower annular capsule 4 will cooperate with each other to play a buffering role.

[0074] When the upper annular capsule 4 first contacts the ground or an obstacle, the gravity buffering of the liquid inside it and the elastic buffering of the gas can initially absorb part of the impact energy; then, the lower annular capsule 4 continues to play a role, further absorbing and dispersing the remaining impact energy; this layered buffering method, compared with a single annular capsule 4, can more effectively consume and disperse the impact force, reduce the impact force on the measuring instrument body 2, thereby better protecting the precision components in the measuring instrument body 2, improving the equipment's ability to resist damage in complex environments, ensuring its measurement accuracy and service life, and providing a solid guarantee for data acquisition in engineering cost calculations.

[0075] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0076] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A measurement device for construction cost, characterized in that: The engineering cost measurement equipment includes: Tripod; A measuring instrument body is arranged on the top of the tripod; A mounting frame, arranged on the measuring instrument body; An annular bag is arranged on the mounting frame and sleeved on the outer circumference of the measuring instrument body. A sealed chamber is formed between the annular bag and the mounting frame, and the sealed chamber is filled with gas and liquid.

2. The engineering cost measurement device according to claim 1, characterized in that: The tripod comprises a base and three rotating legs, telescopic legs, a limiting sleeve and a locking rod. The three rotating legs are arranged circumferentially at the bottom of the base, the top ends of the rotating legs are hinged to the base, and the bottom ends are suspended; the top ends of the telescopic legs are arranged on the rotating legs and form a sliding fit with the rotating legs, and the bottom ends of the telescopic legs are supported on the ground when in use; the limiting sleeves are arranged on the rotating legs and are simultaneously sleeved on the outer circumference of the telescopic legs; the locking rod is arranged on the limiting sleeves and can slide along the radial direction of the limiting sleeves and can form a locking fit with the telescopic legs.

3. The engineering cost measurement device according to claim 2, characterized in that: The engineering cost measurement equipment also includes a controller, an adjustment mechanism and at least three pressure sensors, all of which are arranged on the mounting frame and arranged along the circumference of the annular bag, and are configured to sense the pressure of the liquid in the sealed chamber and are electrically connected to the controller; the adjustment mechanism is configured to adjust the position of the locking rod; the controller is configured to calculate the inclination angle of the engineering cost measurement equipment based on the liquid pressure sensed by the pressure sensor, and then when the inclination angle of the engineering cost measurement equipment is greater than a preset value, a signal is sent to the adjustment mechanism to unlock the locking cooperation between the telescopic leg serving as a fulcrum to support the engineering cost measurement equipment and the locking rod thereon.

4. The engineering cost measurement device according to claim 3, characterized in that: The adjustment mechanism includes a power supply and three elastic parts, a magnet and an electromagnetic coil, the power supply is configured to supply power to the electromagnetic coil; the controller is configured to control the power supply of the power supply; the elastic part is arranged between the limit sleeve and the locking rod, and the locking rod has a tendency to move inward under the action of the elastic part; the magnet is fixed on the locking rod; the electromagnetic coil is arranged on the limit sleeve and opposite to the elastic part, and the electromagnetic coil is configured to generate the same magnetic pole as the magnet when power is supplied.

5. The engineering cost measurement device according to claim 4, characterized in that: The elastic member is a compression spring.

6. The engineering cost measurement device according to claim 3, characterized in that: The pressure sensor is electrically connected to the measuring instrument body and is configured to send a pressure signal to the measuring instrument body to determine the levelness of the measuring instrument body.

7. The engineering cost measurement device according to claim 3, characterized in that: The controller is also configured to send a signal to the adjustment mechanism when the inclination angle of the engineering cost measurement device is greater than the preset value, so as to simultaneously unlock the locking cooperation between the telescopic legs that do not serve as a fulcrum to support the engineering cost measurement device and the locking rod thereon.

8. The engineering cost measurement device according to claim 7, characterized in that: The engineering cost measurement equipment also includes three counterweights, which are respectively arranged on the three telescopic legs.

9. The engineering cost measurement device according to claim 3, characterized in that: The measuring instrument body includes a lens, which can rotate around a horizontal axis; the controller is also configured to calculate the tipping direction of the engineering cost measuring device based on the liquid pressure sensed by the pressure sensor, and then control the rotation of the lens when the engineering cost measuring device tips over, so that the lens faces away from the tipping direction of the engineering cost measuring device.

10. The engineering cost measurement device according to claim 1, characterized in that: There are two annular capsules, which are arranged at intervals in the vertical direction.

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