A measuring device for project cost

Abstract

The present invention relates to the technical field of engineering surveying, and particularly relates to a measuring device for project cost. The measuring device for project cost includes a tripod, a measuring instrument body, a mounting frame, and an annular bladder. The measuring instrument body is arranged at the top of the tripod; the mounting frame is arranged on the measuring instrument body; the annular bladder is arranged on the mounting frame and sleeved on the outer periphery of the measuring instrument body. A sealed chamber is formed between the annular bladder and the mounting frame, and the sealed chamber is filled with gas and liquid. When the measuring device for project cost is tilted in any direction due to an external force, under the action of gravity, the liquid can converge to one side of the annular bladder facing the tilting direction of the measuring device for project cost. Furthermore, when the annular bladder contacts the ground, the annular bladder can quickly absorb the impact energy under the combined action of the internal liquid and gas, so as to stably and consistently play a buffering and protecting role, while providing reliable protection for the internal precision components of the measuring instrument body and ensuring the measurement accuracy.

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 engineering projects, runs through all stages of the project. Its core lies in determining the economic investment of the project through accurate engineering measurement calculations 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. Non-Newtonian fluid is provided inside the first connecting rod. 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. Non-Newtonian fluid is provided inside the second connecting rods. 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, achieving 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 violent 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:

[0007] A measuring device for project cost, the measuring device for project cost includes:

[0008] A tripod;

[0009] A measuring instrument body, arranged on the top of the tripod;

[0010] A mounting rack, arranged on the measuring instrument body;

[0011] 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.

[0012] 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.

[0013] 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, 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 fit between the telescopic leg that serves as a fulcrum to support the measuring device for project cost and the locking rod thereon.

[0014] Further, the adjusting mechanism includes a power source, three elastic members, three magnets, and three electromagnetic coils. The power source is configured to supply power to the electromagnetic coils. The controller is configured to control the power supply of the power source. The elastic members are disposed between the limiting sleeve and the locking rod. 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 limiting 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.

[0015] Further, the elastic member is a compression spring.

[0016] 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.

[0017] 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 cooperation between the telescopic leg that does not support the construction cost measuring device as a fulcrum and the locking rod thereon.

[0018] Further, the construction cost measuring device further includes three counterweights, and the three counterweights are respectively disposed on the three telescopic legs.

[0019] 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.

[0020] Further, the number of the annular sacs is two, and they are arranged at intervals in the vertical direction.

[0021] The beneficial effects of the present invention are as follows:

[0022] 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 the 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 consistently play a buffering and protecting role and provide reliable protection for the internal precision components of the measuring instrument body.

[0023] Further, 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 is uneven under the action of gravity, such that the liquid pressures sensed by the three pressure sensors are 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. Furthermore, 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 energy for driving the rotational leg and the telescopic leg that support the measurement device for project cost as a fulcrum to shorten in length. Thus, the kinetic energy of the measurement device for project cost when hitting the ground can be reduced, and the impact force suffered by the measurement device for project cost when hitting the ground can be effectively reduced, further reducing the risk of serious damage to the measurement device for project cost due to tilting.

[0024] Further, 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 performed based on the similarities and differences between the liquid pressures sensed by multiple pressure sensors, ensuring that the measuring instrument body is in an accurate horizontal working state, thereby providing a reliable basis for subsequent engineering measurement work.

[0025] Further, 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, such 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 hitting 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

[0026] Figure 1 is a three-dimensional structural schematic diagram of the measurement device for project cost provided by an embodiment of the present invention;

[0027] Figure 2 is a front structural schematic diagram of the measurement device for project cost provided by an embodiment of the present invention;

[0028] Figure 3 is Figure 2 a partially enlarged structural schematic diagram at A in

[0029] Figure 4 is a cross-sectional structural schematic diagram of the measurement device for project cost provided by an embodiment of the present invention when placed vertically;

[0030] Figure 5 for Figure 4 A schematic diagram of the partially enlarged structure at B in the middle;

[0031] Figure 6 for Figure 4 A schematic diagram of the partially enlarged structure at C in the middle;

[0032] 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;

[0033] Figure 8 for Figure 7 The schematic diagram of the local enlarged structure at D in the middle;

[0034] 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.

[0035] in:

[0036] 1. Tripod; 101. Base; 102. Rotating legs; 103. Telescopic legs; 104. Limiting sleeve; 1041. Bracket; 105. Locking rod;

[0037] 2. Measuring instrument body; 201. Lens;

[0038] 3. Mounting frame; 301. First mounting ring; 302. Second mounting ring; 303. Support rod; 304. Protrusion; 305. Third mounting ring; 306. Mounting shell;

[0039] 4. Annular capsule;

[0040] 501, power supply; 502, compression spring; 503, magnet; 504, electromagnetic coil;

[0041] 6. Pressure sensor;

[0042] 7. Counterweight. DETAILED DESCRIPTION

[0043] 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.

[0044] The serial numbers assigned to components in this text, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequential or technical meaning. The terms "connected" and "coupled" as used herein, unless otherwise specifically stated, both include direct and indirect connection (coupling). In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and 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 thus should not be construed as a limitation to the present invention.

[0045] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be 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 be that the first feature is directly above or obliquely above the second feature, or merely 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 be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0046] As Figures 1 to 9 shown, the measurement 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.

[0047] Specifically in this embodiment, the cross-sectional shape of the annular bladder 4 is set to a U shape, and the opening faces inward; the mounting bracket 3 is set to have a first mounting ring 301. When mounted, the first mounting ring 301 is sleeved on the outer periphery of the measuring instrument body 2. The cross-sectional shape of the first mounting ring 301 is set to a U shape, and the opening faces horizontally outward. When mounted, the first mounting ring 301 is coaxially and sealingly inserted into the inner periphery of the annular bladder 4 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 set to have 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 a 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 passes through the second mounting ring 302 and is suspended, ensuring 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. When mounted, the protrusions 304 are fixed to the measuring instrument body 2 by bolts.

[0048] 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.

[0049] Optionally, the number of the support rods 303 can be set to six and are evenly arranged circumferentially.

[0050] Optionally, the number of the protrusions 304 can be set to three and are evenly arranged circumferentially.

[0051] 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 mounted, the top ends of the support legs are hinged to the base 101, and the bottom ends support on the ground during use.

[0052] During normal measurement, as Figure 2 shown, the measuring equipment 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.

[0053] During use, when the cost measurement device for construction projects is tilted in any direction due to external forces (wind, impact of foreign objects, etc.), based on the principle of gravity, the liquid in the sealed chamber will quickly gather to the side of the annular capsule 4 in the direction of the device tilting. In this process, the fluidity of the liquid enables it to respond quickly according to the actual direction of the device tilting, while the gas is evenly distributed in the remaining space in the chamber due to its compressibility. Take the right tilt of the cost measurement device as an example. Figure 8 As shown, the liquid converges to the right, with less on the left and more on the right.

[0054] Subsequently, when the annular capsule 4 comes into contact with the ground, the annular capsule 4 can effectively absorb the impact energy from the ground under the combined effect of the gravity buffering of the internal liquid and the elastic buffering of the gas; the high density characteristics of the liquid enable it to consume a large amount of impact energy through its own displacement and deformation when it is subjected to the impact force, and at the same time, the compressibility of the gas further buffers and disperses the impact force. The two work together to ensure that no matter in which direction the engineering cost measurement equipment falls, the annular capsule 4 can stably and consistently play a buffering and protective 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 equipment in complex use environments, and providing a solid guarantee for data acquisition in engineering cost calculations.

[0055] Optionally, the gas can be set to use nitrogen or air, and when using air, in order to avoid corrosion or other adverse effects on the components inside the sealed chamber during long-term use due to the presence of oxygen, water vapor and other components in the air, the air can be pre-treated such as drying to improve its stability and applicability.

[0056] 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, it is necessary to consider the influence of ambient temperature and take corresponding insulation or antifreeze measures to ensure its performance.

[0057] In some embodiments, in order to adapt to complex measurement environments, the tripod 1 is configured to have a base 101 and three rotating legs 102, telescopic legs 103, limit sleeves 104, and locking rods 105. The three rotating legs 102 are arranged circumferentially at the bottom of the base 101, the top ends of the rotating legs 102 are hinged on the base 101, and the bottom ends are suspended; the top ends of the telescopic legs 103 are arranged on the rotating legs 102 and form a sliding fit with the rotating legs 102, and the bottom ends of the telescopic legs 103 are supported on the ground when in use; the limit sleeves 104 are arranged on the rotating legs 102 and are simultaneously sleeved on the outer periphery of the telescopic legs 103; the locking rod 105 is arranged on the limit sleeves 104 and can slide along the radial direction of the limit sleeves 104 and can form a locking fit with the telescopic legs 103.

[0058] 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 limiting 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 limiting sleeve 104 and is arranged outside the limiting sleeve 104 to ensure convenience during adjustment.

[0059] Optionally, the locking rod 105 can be arranged to be threadedly inserted into the limiting sleeve 104, penetrate through the limiting 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.

[0060] 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 process, its height in the vertical direction will first rise and then fall; when the total station makes a circular motion upward 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 down, the stored gravitational potential energy will be reconverted into kinetic energy again; due to the accumulation of more gravitational potential energy during the previous height rise, during the fall-back process, the converted kinetic energy will be greater; 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 and the like 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 project cost measurement work.

[0061] 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 bracket 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 sensor 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 fit between the telescopic leg 103 that serves as a fulcrum to support the measuring device for project cost and the locking rod 105 thereon.

[0062] Specifically in this embodiment, to facilitate the installation of the pressure sensor 6, the mounting bracket 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 installed, the multiple pressure sensors 6 are arranged circumferentially on the third mounting ring 305, and the sensing end penetrates through the lower end surface of the first mounting ring 301 and is inserted into the liquid to ensure that the pressure of the liquid can be sensed in real time; when connected, the pressure sensor 6 is connected to the controller through a signal line to ensure that the liquid pressure information can be transmitted to the controller.

[0063] Optionally, the pressure sensor 6 can be set as a strain gauge pressure sensor, a piezoresistive pressure sensor, a capacitive pressure sensor, a piezoelectric pressure sensor or a Hall pressure sensor.

[0064] Optionally, the controller can be integrated inside the measuring instrument body 2.

[0065] 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 facing the direction of the device toppling in a very short time; due to this non-uniform distribution characteristic of the liquid, there will inevitably 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.

[0066] The controller serves as the core of the entire intelligent control of the equipment. It has a built-in extremely precise algorithm program that has been optimized through extensive testing. The program can use complex and precise trigonometric calculation principles to perform in-depth analysis and calculations on the different pressure values fed back by the three pressure sensors 6, thereby being able to accurately calculate the current tilt angle of the engineering cost measurement equipment within milliseconds. To ensure the safety of the equipment, a safety threshold is pre-set in the controller. The safety threshold is the preset value. Once the controller determines through calculation that the tilt angle of the equipment exceeds the preset safety threshold, it will immediately send a specific and unique control signal to the adjustment mechanism through the internal communication mechanism.

[0067] As an execution unit, the adjustment mechanism has the characteristics of fast response and precise execution; when it receives the signal from the controller, it will act quickly to accurately unlock the originally tight locking fit between the telescopic leg 103 and the locking rod 105 thereon, which serves as a fulcrum to support the engineering cost measurement equipment.

[0068] In the dynamic process of the engineering cost measurement device tipping over, part of the gravitational potential energy generated by the measuring instrument body 2 due to its own gravity will be cleverly converted into energy to drive the rotating legs 102 and telescopic legs 103 that serve as fulcrums to shorten the length of the engineering cost measurement device. Specifically, as the device continues to tilt, gravity will decompose a component force to act on the rotating legs 102 and telescopic legs 103. Under the continuous action of this component force, the total length of the rotating legs 102 and telescopic legs 103 can be adaptively shortened according to the degree of tilt of the device.

[0069] As the total length of the rotating legs 102 and the telescopic legs 103 serving as the fulcrum is reduced, the overall center of gravity height of the equipment is reduced accordingly. According to the calculation formula of gravitational potential energy Ep=mgh (where Ep is gravitational potential energy, m is the equipment mass, g is the gravitational acceleration, and h is the center of gravity height), it can be seen that when the equipment mass m and the gravitational acceleration g remain unchanged, the reduction of the center of gravity height h will reduce the gravitational potential energy Ep of the equipment; when the equipment collides with the ground, according to the law of conservation of energy, the reduction of gravitational potential energy means that the energy converted into kinetic energy is also reduced accordingly, that is, the kinetic energy of the equipment when colliding with the ground is reduced, and because kinetic energy is closely related to impact force, the smaller the kinetic energy, the smaller the impact force generated when hitting the ground, thereby effectively reducing the risk of serious damage to the measurement equipment for engineering cost due to tipping.

[0070] It is understandable that when calculating the current tilt angle of the engineering cost measurement device, in addition to the algorithm based on trigonometric functions, it can also be set to be calculated through a least squares fitting algorithm or a Kalman filter algorithm.

[0071] Further, the adjusting mechanism is arranged to include a power source 501, three elastic members, magnets 503 and electromagnetic coils 504, and the power source 501 is configured to be able to energize 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, and when the electromagnetic coils 504 are energized, they are configured to be able to generate the same magnetic poles as the magnets 503.

[0072] Specifically in this embodiment, for the convenience of installing the power source 501, the mounting frame 3 is arranged to further have 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 arranged to further have a support 1041. The support 1041 is arranged as an E-shaped structure. The cantilevers at both ends of the support 1041 are vertically arranged on the outer peripheral wall of the limiting sleeve 104, and the cantilever in the middle of the support 1041 is arranged in a suspended manner. The compression spring 502 is sleeved on the cantilever in the middle of the support 1041 during installation, and the outer end is arranged on the support 1041; the adjusting rod is slidably sleeved on the cantilever in the middle of the support 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.

[0073] 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.

[0074] 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 the magnetic poles 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.

[0075] Optionally, the power supply 501 can also be set to be integrated inside the measuring instrument body 2.

[0076] In other embodiments, to improve the accuracy when leveling the measuring instrument body 2, the pressure sensor 6 is electrically connected to the measuring instrument body 2 and configured to be able to send a pressure signal to the measuring instrument body 2 to judge the levelness of the measuring instrument body 2.

[0077] During use, when the measuring instrument body 2 is in the initial placement state, if the measuring instrument body 2 happens to be 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 the pressure signal to the measuring instrument body 2 in real time and accurately through a stable electrical connection line.

[0078] The measuring instrument body 2 integrates an advanced and precise signal analysis and processing system; after receiving the pressure signals from multiple pressure sensors 6, this system will immediately perform synchronous comparison and in-depth analysis on these signals; a standard value range of the pressure signal in the ideal horizontal state is preset in the system; when the measuring instrument body 2 has a horizontal deviation, the liquid in the sealed chamber will displace due to the action of gravity, resulting in a change in the liquid pressure borne by the pressure sensors 6 at different positions; this pressure change will be intuitively reflected in the pressure signals sent by the pressure sensors 6 to the measuring instrument body 2, causing 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 accurately calculate the inclination degree of the measuring instrument body 2 in each direction according to the built-in complex algorithm.

[0079] For example, if the signal value of a pressure sensor 6 on one side is significantly higher than that of other sensors, the measuring instrument body 2 can judge through analysis that there is a downward inclination trend on that side; based on this accurate judgment, the measuring instrument body 2 can feedback detailed levelness 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 according to this information. Through this mechanism of the close cooperation between the pressure sensor 6 and the measuring instrument body 2, the accuracy of leveling the measuring instrument body 2 can be greatly improved, providing a more reliable basis for subsequent engineering measurement work, effectively ensuring the accuracy of measurement data, and thus improving the accuracy and reliability of the project cost calculation.

[0080] In other embodiments, to further reduce the impact force on the ground when the measurement device for project cost is impacted, the controller is configured to also send a signal to the adjustment mechanism when the tilt angle of the measurement 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 measurement device for project cost as a fulcrum and the locking rod 105 thereon.

[0081] 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 elongates 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 measurement device for project cost as a fulcrum is increased.

[0082] This increase in the total length has important significance in many aspects: 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, continue to provide reliable guarantee for subsequent engineering measurement work, and minimize the potential negative impact of the device tipping on the accuracy of project cost calculation data.

[0083] In a further embodiment, to both improve the support stability of the tripod 1 for the measuring instrument body 2 and improve 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, it is provided that the measurement device for project cost further includes three counterweights 7, and the three counterweights 7 are respectively arranged on the three telescopic legs 103.

[0084] Specifically in this embodiment, the counterweight 7 is arranged inside the telescopic leg 103 and close to the bottom.

[0085] 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 is, 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.

[0086] 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 for support and the rotating legs 102 connected thereto play a key 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 constant, the large mass m of the counterweights 7 enables a large acting force F to be generated within 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.

[0087] 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 for support 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.

[0088] In other embodiments, when the total station is tilted, since the lens 201 is a relatively fragile and critical 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 arranged 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 project cost based on the liquid pressure sensed by the pressure sensor 6, and then be able to control the rotation of the lens 201 when the measuring device for project cost is tilted, so that the lens 201 faces away from the tilting direction of the measuring device for project cost.

[0089] Specifically in this embodiment, to provide a driving force for the lens 201 to rotate around the horizontal axis, the measuring instrument body 2 is arranged to further include a driving motor. The driving motor is inserted into the measuring instrument body 2 during installation, 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.

[0090] During use, when the measuring device for project cost begins 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 a pre-established correspondence model between pressure and tilting direction, the controller can accurately determine the tilting direction of the device within a very short time.

[0091] Once the controller determines that the measuring device for project 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 project cost; in this way, during the tilting process of the device, the lens 201 can be maximally avoided from directly being impacted by the ground or colliding with ground debris, thereby effectively reducing the risk of damage to the lens 201 due to tilting.

[0092] In some other embodiments, to further improve the buffer protection effect of the measuring device for project cost when dealing with tilting situations, it is arranged that the number of the annular sacs 4 is two, and they are arranged at intervals in the vertical direction.

[0093] Specifically in this embodiment, to facilitate the installation of the two annular sacs 4, the mounting frame 3 is arranged 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.

[0094] 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.

[0095] 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.

[0096] 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.

[0097] 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 measuring device for project cost, characterized in that, The measurement device for project cost includes: A tripod; A measuring instrument body, which is arranged on the top of the tripod; A mounting bracket, which is arranged on the measuring instrument body; An annular bladder, which is arranged on the mounting bracket and sleeved on the outer periphery of the measuring instrument body. A sealed chamber is formed between the annular bladder and the mounting bracket, and the sealed chamber is filled with gas and liquid; 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; The measurement 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 bracket, arranged circumferentially along the annular bladder, and are all configured 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 measurement device for project cost according to the liquid pressure sensed by the pressure sensors. Furthermore, when the inclination angle of the measurement 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 measurement device for project cost as a fulcrum and the locking rod thereon. Furthermore, during the process of the measurement device for project cost tipping over, 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, so as to be able to reduce the kinetic energy when the measurement device for project cost impacts the ground.

2. The measuring device for project cost according to claim 1, characterized in that, The adjusting mechanism includes a power supply, three elastic members, magnets and electromagnetic coils. The power supply is configured to be able to supply power to the electromagnetic coils. The controller is configured to be able to control the power supply of the power supply. The elastic member is arranged between the limit sleeve and the locking rod. Under the action of the elastic member, the locking rod has a tendency to move inward. The magnet is fixedly arranged on the locking rod. The electromagnetic coil is arranged on the limit sleeve and is arranged opposite to the elastic member. When the electromagnetic coil is energized, it is configured to be able to generate the same magnetic pole as the magnet.

3. The measuring device for project cost according to claim 2, characterized in that, The elastic member is a compression spring.

4. The measuring device for project cost according to claim 1, characterized in that, The pressure sensor is electrically connected to the measuring instrument body and is configured to be able to send a pressure signal to the measuring instrument body to be used to judge the levelness of the measuring instrument body.

5. The measuring device for project cost according to claim 1, characterized in that, 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.

6. The measuring device for project cost according to claim 5, wherein The construction cost measuring device further includes three counterweights, and the three counterweights are respectively arranged on the three telescopic legs.

7. The measuring device for project cost according to claim 1, characterized in that, The measuring instrument body includes a lens, and the lens can rotate around a horizontal axis; the controller is further configured to be able to calculate the tipping direction of the construction cost measuring device according to the liquid pressure sensed by the pressure sensor, and then be able to control the rotation of the lens when the construction cost measuring device tips over, so that the lens faces away from the tipping direction of the construction cost measuring device.

8. The measuring device for project cost according to claim 1, wherein The number of the annular sacs is two, and they are arranged at intervals in the vertical direction.

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