Concrete surface depth automatic measuring device and measuring method

Abstract

The application discloses a kind of concrete face depth automatic measuring device and measuring method, it is related to concrete face depth measuring method technical field, the device includes: mounting bracket and measuring component;Measuring component includes: reel, position sensing switch and depth measuring part;Reel is provided with depth measurement piece connection;Position sensing switch is located below reel;When concrete face depth measurement starts, position sensing switch is under pressure and in the on state;When depth measurement piece is in contact with concrete face, the pressure applied to position sensing switch disappears, and position sensing switch switches to the off state;Depth measuring part thereby calculates the depth value corresponding to the time between measurement start and receiving measurement stop signal.The device can replace manual concrete weight measurement, save time and effort, convenient and fast, can significantly improve measurement efficiency and accuracy.

Description

Technical Field

[0001] This application generally relates to the technical field of concrete surface depth measurement methods, specifically an automatic concrete surface depth measurement device and measurement method. Background Technology

[0002] In modern water conservancy and construction engineering, the construction of underground anti-seepage walls is a crucial step. During the concrete pouring process, timely and accurate measurement of the concrete surface rise plays a decisive role in the overall construction quality and the arrangement of subsequent procedures. Currently, the industry commonly uses the manual plumb bob method for measuring concrete surface depth.

[0003] However, this traditional measurement method has several undeniable drawbacks. In terms of accuracy, differences in operator technique and feel among technicians mean that even measurements taken at the same location and time can yield varying concrete depths, resulting in significant errors. Regarding measurement frequency, on-site technicians typically have demanding workloads and limited manpower, making frequent concrete depth measurements impossible. This low measurement frequency significantly diminishes the value of the acquired data for subsequent construction statistics, hindering timely adjustments to construction strategies and potentially causing delays or quality issues. Summary of the Invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide an automatic measuring device and method for measuring the depth of concrete surface.

[0005] In a first aspect, this application provides an automatic concrete surface depth measuring device, wherein the measuring device is installed on the ground and the concrete surface of the area to be poured is located below the ground. The measuring device includes: The mounting frame is installed on the ground and a measuring component is mounted thereon; the measuring component includes: a reel, a position sensing switch, and a depth measuring unit; A depth measuring element is connected to the drum; a position sensing switch is located below the drum; the drum is used to release the depth measuring element onto the concrete surface. When the concrete surface depth measurement begins, the position sensing switch is subjected to pressure from the depth measuring element, thus being in a conductive state; when the depth measuring element contacts the concrete surface, the pressure applied to the position sensing switch disappears, and the position sensing switch switches to an open state. The depth measuring unit is connected to the position sensing switch signal, and the disconnected state is used as the measurement stop signal to calculate the depth value corresponding to the time from the start of the measurement to the receipt of the measurement stop signal.

[0006] According to the technical solution provided in this application, the depth measuring device includes: a suspension rope wound on the drum; a counterweight connected to the bottom of the suspension rope, and a pressure sensor disposed at the bottom of the counterweight; the drum can release and retract the suspension rope by rotating it.

[0007] According to the technical solution provided in this application, the measuring component further includes: a reel bearing seat, which is disposed on the mounting frame and is used to support the reel; A fixed pulley and a step counting wheel are both mounted on the mounting frame and arranged in cooperation with the drum; the suspension rope is guided by the fixed pulley and the step counting wheel, thereby being released to the concrete surface.

[0008] According to the technical solution provided in this application, the depth measurement unit includes: The controller is connected to the step counting wheel via an encoder; the encoder is connected to the rotation shaft of the step counting wheel and is used to collect the rotation information of the step counting wheel and generate a rotation signal transmitted to the controller; wherein, the controller is used to calculate the corresponding depth value based on the rotation information generated by the step counting wheel from the start of the measurement to the receipt of the measurement stop signal; A pressure-sensitive link is provided, one end of which is rotatably connected to the mounting bracket via a pin, and the other end is connected to the encoder housing. The pressure-sensitive link is located above the position sensing switch. When the concrete surface depth measurement begins, the pressure-sensitive link presses against the position sensing switch by the weight of the depth measuring component. When the depth measuring component contacts the concrete surface, the pressure-sensitive link stops pressing against the position sensing switch.

[0009] According to the technical solution provided in this application, the measuring device further includes: a motor assembly; the motor assembly includes: The motor is mounted on the mounting bracket, and its drive end is connected to one end of the coupling, the other end of the coupling is connected to the drum, and the motor is used to drive the drum to rotate. The motor is a brake motor. When the motor assembly is not powered, the motor is automatically locked by the brake to restrict its rotation.

[0010] Secondly, this application provides an automatic method for measuring the depth of concrete surfaces, applied to the aforementioned automatic depth measuring device, the method comprising the following steps: Obtain geological information of the concrete surface to be tested, wherein the geological information includes at least the viscosity of the concrete surface; Based on the current viscosity of the concrete surface, the depth measurement strategy database is invoked to confirm the target measurement mode corresponding to the current viscosity of the concrete surface; the depth measurement strategy database includes at least: viscosity range and measurement mode corresponding to each viscosity range, and the measurement mode includes at least: a first measurement mode and a second measurement mode; The measuring device is controlled to execute either the first or second measuring mode corresponding to the target measuring mode, and the depth of the concrete surface from the ground is measured to obtain a depth value.

[0011] According to the technical solution provided in this application, the measuring device is controlled to execute a first measuring mode corresponding to the target measuring mode to measure the depth of the concrete surface from the ground, thereby obtaining a depth value. Specifically, this includes: Confirm the measurement calibration parameters within the measuring device, which are used to provide a reference for depth measurement; The control motor assembly is powered on to drive the drum to rotate, thereby releasing the depth measuring device to the concrete surface to be measured. At this time, the position sensing switch is pressed by the depth measuring device and is in the conducting state; the depth measuring device moves to the concrete surface to be measured via the step counting wheel. Monitor the state switching of the position sensing switch, and determine if the position sensing switch switches from the on state to the off state, then obtain the rotation information of the step counting wheel; Based on the rotation information, the depth between the ground and the concrete surface to be measured is calculated.

[0012] According to the technical solution provided in this application, the measuring device is controlled to execute a second measuring mode corresponding to the target measuring mode, and the depth of the concrete surface from the ground is measured to obtain a depth value, specifically including: Confirm the measurement calibration parameters within the measuring device, which are used to provide a reference for depth measurement; The control motor assembly is powered on to drive the drum to rotate, thereby releasing the depth measuring device to the concrete surface to be measured. At this time, the position sensing switch is pressed by the depth measuring device and is in the conducting state. The depth measuring device moves to the concrete surface to be measured via the step counting wheel, and a pressure sensor is provided at the bottom of the depth measuring device. The system monitors the state switching of the position sensing switch and the impact force signal generated by the pressure sensor. If the position sensing switch switches from the on state to the off state and the value corresponding to the impact force signal is greater than a first preset threshold, the system obtains the rotation information of the step counting wheel. Based on the rotation information, the depth between the ground and the concrete surface to be measured is calculated.

[0013] According to the technical solution provided in this application, the measurement calibration parameters within the measuring device are confirmed, specifically including: The update cycle of the measurement calibration parameters is obtained; the measurement calibration parameters include at least the actual circumference of the step counting wheel; If the update cycle is greater than or equal to the preset cycle, a prompt message is issued to remind the user that the measurement calibration parameters need to be updated.

[0014] According to the technical solution provided in this application, based on the rotation information, the depth value between the ground and the concrete surface to be measured is calculated, specifically including: The rotation angle of the step counting wheel is converted into the release length of the suspension rope in the depth measuring device, and the release length is recorded as a depth measurement data; The measuring device is controlled to perform a preset number of measurements in a corresponding target measurement mode to obtain multiple sets of depth measurement data; Based on multiple sets of depth measurement data, the depth between the ground and the concrete surface to be measured is calculated.

[0015] In summary, this technical solution specifically discloses an automatic concrete surface depth measuring device and method. The measuring device includes: a mounting frame installed on the ground, on which a measuring component is mounted; the measuring component includes: a drum, a position sensor switch, and a depth measuring unit; a depth measuring element is connected to the drum; the position sensor switch is located below the drum; the drum is used to release the depth measuring element to the concrete surface; at the start of concrete surface depth measurement, the position sensor switch is subjected to pressure from the depth measuring element, thus being in a conductive state; when the depth measuring element contacts the concrete surface, the pressure applied to the position sensor switch disappears, and the position sensor switch switches to an open state; the depth measuring unit is signal-connected to the position sensor switch, and the open state serves as the measurement stop signal, calculating the depth value corresponding to the period from the start of measurement to the receipt of the measurement stop signal.

[0016] Existing methods for measuring concrete surface depth mostly rely on manual plumb bob measurement. However, due to variations in the operating techniques and feel of different technicians, and the complexity of the operation, this method is not only time-consuming and labor-intensive but also prone to significant errors in the measurement data. This application presents an automatic measuring device that utilizes the gravity acting on a position sensor switch during the release of the depth measuring element as the starting point for recording, and the measurement stops when the depth measuring element touches the bottom and the pressure on the position sensor switch disappears. The depth measuring unit automatically monitors the entire measurement interval, thus clearly recording the corresponding depth measurement data. This device replaces manual measurement, automating depth measurement while eliminating data inconsistencies caused by manual measurement, thereby improving measurement accuracy and efficiency. Attached Figure Description

[0017] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the overall structure of an automatic concrete surface depth measuring device.

[0018] Figure 2 This is a front view of an automatic concrete surface depth measuring device.

[0019] Figure 3 This is an enlarged view of the measuring component in an automatic concrete surface depth measuring device.

[0020] Figure 4 This is a flowchart illustrating an automatic method for measuring the depth of concrete surfaces.

[0021] Figure 5 This is a flowchart illustrating the first measurement mode corresponding to step S300 in an automatic method for measuring the depth of a concrete surface.

[0022] Figure 6 This is a flowchart illustrating the second measurement mode corresponding to step S300 in an automatic method for measuring the depth of concrete surfaces.

[0023] Figure 7 This is a schematic diagram of the depth calculation process in an automatic method for measuring the depth of a concrete surface.

[0024] The following are the labels in the diagram: 1. Mounting bracket; 111. Structural plate; 112. Extension plate; 113. Base plate; 2. Drum; 3. Depth measuring component; 4. Position sensor switch; 5. Lifting rope; 6. Counterweight; 7. Reel bearing seat; 8. Fixed pulley; 9. Pedometer wheel; 10. Encoder; 11. Contact linkage; 12. Motor; 13. Coupling; 14. Motor mounting bracket; 15. Lifting rope cleaning brush; 16. Indicator light strip; 17. Control display; 18. Fixing bolt; 19. Shaft pin. Detailed Implementation

[0025] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] Example 1 Please refer to Figure 1 and Figure 3 The diagram shown in this embodiment illustrates the overall structure of an automatic concrete surface depth measuring device, along with an enlarged view of the measuring components. This device addresses the current problems of low efficiency, low accuracy, and poor automation in concrete surface depth measurement. The device includes: Mounting frame 1 is installed on the ground and a measuring component is provided on it; the measuring component includes: a drum 2, a position sensing switch 4, and a depth measuring unit; A depth measuring element 3 is connected to the drum 2; a position sensing switch 4 is located below the drum 2; the drum 2 is used to release the depth measuring element 3 onto the concrete surface. When the concrete surface depth measurement begins, the position sensing switch 4 is subjected to pressure from the depth measuring element 3, thus being in the conducting state; when the depth measuring element 3 comes into contact with the concrete surface, the pressure applied to the position sensing switch 4 disappears, and the position sensing switch 4 switches to the off state. The depth measurement unit is connected to the position sensing switch 4, and the disconnected state is used as the measurement stop signal. The depth value corresponding to the time from the start of the measurement to the receipt of the measurement stop signal is calculated.

[0028] In this embodiment, the mounting frame 1 serves as the structural carrier of the entire automatic depth measurement device. During use, it needs to be stably placed on the ground based on its structural design to ensure stable subsequent measurement work. For example... Figure 1 As shown, the frame of mounting bracket 1 has a centrally protruding structural plate 111 (with a base plate 113 below the structural plate), and horizontal extension plates 112 on both sides of the protrusion; the base plate 113 and the structural plate 111 provide installation space for the measuring component and the motor component, while the extension plates 112 are used for stable contact with the ground; the drum 2 in the measuring component is used to move the depth measuring element 3 towards the concrete surface located below the ground; it should be noted that the depth measuring element 3 needs to have a certain weight to press the position sensing switch 4, which is the trigger button for automatic measurement. When the concrete surface depth... When the depth measurement begins, the drum 2 releases the depth measuring component 3 downwards. At this time, the position sensor switch 4 is pressed by the depth measuring component 3 and is in the conducting state, which means that the depth measurement has started. When the depth measuring component 3 comes into contact with the concrete surface, the force exerted by the depth measuring component 3 on the position sensor switch 4 disappears, the position sensor switch 4 resets, the signal is disconnected, and the position sensor switch 4 switches from the conducting state to the disconnected state. By communicating with the position sensor switch 4, the depth measuring unit can monitor the triggering time of the conducting state and the disconnected state, thereby accurately controlling the time interval corresponding to the depth measurement and calculating a more accurate depth value.

[0029] Therefore, this application can replace manual concrete plumb bob measurement, saving time and effort, and is convenient and quick, significantly improving measurement efficiency. It also eliminates data discrepancies caused by manual measurement, improving measurement accuracy and the level of intelligence on the construction site. In practical applications, the accurate measurement of concrete surface depth can reach ±1cm, or even higher precision. On this basis, it can ensure that the thickness of the concrete protective layer better meets the design requirements, helping to guarantee the strength and stability of the concrete structure, extend the service life of the building, and provide accurate basis for subsequent construction procedures, thereby improving construction efficiency.

[0030] In a preferred embodiment, the depth measuring component 3 includes: a suspension rope 5 wound on a drum 2; a counterweight 6 connected to the bottom of the suspension rope 5, and a pressure sensor disposed at the bottom of the counterweight 6; the drum 2 can release and retract the suspension rope 5 by rotating it.

[0031] The depth measuring component 3 can be a suspension rope 5 and a counterweight 6. The suspension rope 5 is wound around the drum 2 and can be wound up and down by the rotation of the drum 2. The suspension rope 5 is a high-strength, low-elasticity, and corrosion-resistant rope, and its free end is connected to the counterweight 6. The counterweight 6 can be a hammer (the hammer is an inverted conical hard, high-density part with a smooth surface and a polytetrafluoroethylene anti-stick coating, and a flat lower surface), or other structures with a smooth bottom and a certain weight. The specific weight needs to be adjusted according to the trigger sensitivity of the position sensing switch 4. In order to increase the anti-interference ability of the depth measuring component 3, a miniature pressure sensor is also set at the bottom of the counterweight 6 to collect the impact force received by the counterweight 6 when it touches the bottom, so as to avoid invalid bottom contact caused by the difference in concrete viscosity or contact with the groove wall or other structures, thereby improving the versatility and accuracy of the measuring device.

[0032] In a preferred embodiment, such as Figure 2 and Figure 3 As shown, the measuring assembly also includes: a spool bearing housing 7, which is mounted on the mounting frame 1 and is used to support the spool 2; Fixed pulley 8 and step counting wheel 9 are both mounted on the mounting frame 1 and are arranged in conjunction with the drum 2; the suspension rope 5 is guided by the fixed pulley 8 and step counting wheel 9 and thus released to the concrete surface.

[0033] Specifically, the roller bearing seat 7 is located at the structural plate 111 and is used to support the rotation of the roller 2; the fixed pulley 8 and the step counting wheel 9 are respectively located on the inner side of the structural plate 111 and the bottom plate 113. The fixed pulley 8 is used to guide the suspension rope 5 and ensure that the suspension rope can fit with the step counting wheel 9 when it is being wound up and down. The circumference of the step counting wheel 9 is a known fixed value. When the suspension rope 5 is wound up and down, it will drive the step counting wheel 9 to rotate without slippage. For every unit length that the suspension rope 5 is wound up and down, the corresponding step counting wheel 9 will rotate by the corresponding arc length. Based on the rotation data of the step counting wheel 9, the winding and unwinding length of the suspension rope 5 can be obtained, thereby obtaining the height of the concrete surface from the ground.

[0034] In a preferred embodiment, the depth measuring unit includes: The controller is connected to the step counting wheel 9 via encoder 10. Encoder 10 is connected to the rotation shaft of step counting wheel 9 and is used to collect the rotation information of step counting wheel 9 and generate a rotation signal transmitted to the controller. The controller is used to calculate the corresponding depth value based on the rotation information generated by step counting wheel 9 from the start of measurement to the receipt of measurement stop signal. The touch-sensitive link 11 has one end rotatably connected to the mounting bracket 1 via a shaft pin 19, and the other end connected to the encoder 10 housing. The touch-sensitive link 11 is located above the position sensing switch 4. When the concrete surface depth measurement begins, the touch-sensitive link 11 presses against the position sensing switch 4 by the weight of the depth measuring component 3. When the depth measuring component 3 contacts the concrete surface, the touch-sensitive link 11 stops pressing the position sensing switch 4.

[0035] Specifically, the controller is the computation and processing center of the entire measuring device, as can be seen in [reference needed]. Figure 1 The control display 17 integrates a processing chip and includes a built-in battery, wireless hotspot module, controller, display, and switch. When the external power supply is interrupted, the built-in battery serves as a backup power source for the device. The controller is connected to the step-counting wheel 9 via a cable and is used to acquire data collected by the encoder and monitor the signal triggered by the position sensor switch 4. The controller then converts the encoder signal into a depth value, which is displayed in real time on the display. The wireless hotspot module allows external terminals such as mobile phones and computers to communicate with the device via its hotspot network. On these external terminals, the device's dedicated software allows for functions such as setting measurement intervals, manually inserting measurement points, saving files, and generating charts.

[0036] In addition, the device is equipped with an indicator light strip 16 on the edge of the mounting frame 1. The indicator light strip 16 is a three-color LED light strip, which can switch between red, green and yellow colors according to the function settings when powered on. For example, the red indicator light is on when the hammer is lowered, the green indicator light is on when the hammer is raised, the yellow indicator light is on when the motor exceeds the set torque, and the built-in battery is powered when the external power supply is cut off. The specific switching function can be set according to the actual situation.

[0037] The position sensor switch 4 has a built-in spring button. The button surface contacts the contact link 11. When the step counting wheel 9 is under the pressure of the suspension rope, the contact link 11 will press the position sensor switch 4, compressing the built-in spring. The sensor switch will send a conduction signal to the controller. When the pressure on the step counting wheel 9 is removed, the position sensor switch 4 will automatically reset under the action of the spring, the conduction signal will disappear, and it will switch to an off signal. Since the shaft of the encoder 10 is fixed to the shaft hole of the step counting wheel 9, the real-time rotation angle, cumulative rotation angle, and rotation direction of the step counting wheel 9 can be measured and output to the controller. The controller calculates the depth value based on the circumference of the step counting wheel 9.

[0038] In a preferred embodiment, the measuring device further includes: a motor assembly; the motor assembly includes: Motor 12 is mounted on mounting bracket 1, and its drive end is connected to one end of coupling 13. The other end of coupling 13 is connected to drum 2. Motor 12 is used to drive drum 2 to rotate. Motor 12 can be selected as a brake motor. When the motor assembly is not powered, motor 12 is automatically locked by the brake to restrict its rotation.

[0039] Specifically, the motor 12 is fixed to the mounting bracket 1 by fixing bolts 18. The drive end of the motor is connected to the coupling 13, and the other end of the coupling is connected to the drum shaft, thereby driving the drum 2 to rotate. When the motor assembly is not powered, the brake will automatically lock to limit the rotation of the motor and ensure the measurement stability of the measuring device.

[0040] In a preferred embodiment, a hanging rope cleaning brush 15 is also provided at the bottom of the base plate 113. The hanging rope 5 passes through the middle through hole of the hanging rope cleaning brush 15, and can be cleaned synchronously when the hanging rope 5 is retracted and extended to prevent the device from being contaminated by the measuring medium.

[0041] Based on the above description, and combined with Figure 1 , Figure 2 and Figure 3 This application proposes an automatic concrete surface depth measuring device, the specific working principle of which is as follows: Place the measuring device on the ground, with the concrete surface of the area to be poured directly below the ground.

[0042] Powering on the motor assembly controls the rotation of the drum 2, causing it to pull the counterweight 6, connected to the suspension rope 5, downwards, moving it closer to the concrete surface. Since the suspension rope 5 is released downwards via the fixed pulley 8 and the step counter 9, and the counterweight 6 itself has a certain weight, the rope 5 carries a weight as it passes the step counter 9. This weight acts on the contact link 11, which presses the position sensor switch 4 below, activating it. As the rope 5 continues to release downwards until the counterweight 6 touches the concrete... In surface contact, because the concrete surface provides support for the counterweight 6, the tension in the suspension rope 5 disappears. At this time, the pressure exerted by the suspension rope 5 on the position sensor switch 4 through the contact link 11 also disappears, and the position sensor switch 4 resets, switching from the on state to the off state. After receiving the off signal from the position sensor switch 4, the controller records the current time point and calculates the corresponding depth value based on the rotation information of the step counting wheel 9. At the same time, it can also control the motor 12 to reverse until the hammer returns to the initial position. This measuring device effectively reduces errors caused by manual operation and greatly improves measurement accuracy. For example, when different technicians use a manual hammer for measurement, differences in operating techniques and feel will lead to different measurement results, but this device effectively avoids such problems by adding intelligent control.

[0043] Example 2 Based on the concrete surface depth automatic measurement device proposed in the embodiments, this application proposes an automatic concrete surface depth measurement method. This method aims to solve the problem that the traditional method of judging bottoming by the disappearance of "suspension rope tension" (relying on mechanical force transmission) cannot meet the engineering depth measurement requirements when dealing with concrete surfaces of different properties. For example, when measuring the depth of low-viscosity, highly fluid concrete surfaces, the plumb bob in the measuring device will quickly stop falling after contacting the concrete surface due to buoyancy or surface tension, and the suspension rope tension will drop sharply to near zero. Since the signal of the disappearance of tension is clear, the switching of the position sensing switch 4 can be quickly controlled. However, in practical applications, we have found that when dealing with concrete surfaces with low slump (e.g., ≤150mm) and high viscosity, the hammer may slowly sink after contacting the surface due to viscous resistance, and the tension may not completely disappear (there is still some drag force). This can easily lead to a missed judgment that "the tension has not dropped suddenly but the bottom has actually been reached." In addition, depth measurement scenarios are complex. If only "disappearance of the rope tension" is used as a signal, it is also necessary to ensure that the wall grout in the trench does not show abnormal thickening or sedimentation, that the tension does not decrease prematurely due to grout resistance during the hammer's descent, and that the measuring device is free from mechanical jamming or slippage. Only in this way can we ensure that the change in tension truly reflects the hammer's stress state and that the depth measurement is accurate.

[0044] In view of this, such as Figures 4-7As shown in the figure, this application proposes an automatic method for measuring the depth of concrete surfaces. Considering practical applications, it transforms a single judgment into multiple adaptive judgments, thereby ensuring the accuracy, adaptability to various scenarios, and anti-interference capabilities of the measuring device. Specifically, the measurement method includes the following steps: S100. Obtain geological information of the concrete surface to be tested. The geological information shall include at least the viscosity of the concrete surface. In this embodiment, the first step is to obtain the geological information of the concrete surface. This geological information may include viscosity and corresponding fluidity. The information can be obtained through data acquisition or previous survey records, and the specific method is not limited. In this embodiment, viscosity is divided into two categories: low viscosity and high viscosity. Generally, in the field of construction engineering, concrete viscosity is often measured by slump. Low-viscosity concrete has a slump ≥ 200 mm, and high-viscosity concrete has a slump ≤ 150 mm. However, due to differences in materials, mix proportions, and testing methods, the actual range varies, and concrete viscosity is also affected by admixtures, temperature, and other factors, so no specific limitations are imposed.

[0045] S200. Based on the current viscosity of the concrete surface, call the depth measurement strategy database to confirm the target measurement mode corresponding to the current viscosity of the concrete surface; the depth measurement strategy database includes at least: viscosity range and measurement mode corresponding to each viscosity range, and the measurement mode includes at least: first measurement mode and second measurement mode. Based on the aforementioned classification criteria, concrete viscosity in this application is divided into two types: low viscosity and high viscosity. Therefore, after obtaining the viscosity of the concrete surface, the corresponding target measurement mode can be confirmed in the depth measurement strategy database according to the type of viscosity of the current concrete surface (low viscosity and high viscosity).

[0046] The structure of the depth measurement strategy database is shown in Table 1 below.

[0047] Table 1. Example of the structure of the depth measurement strategy database

[0048] To illustrate this in practice, for example, if the slump of the concrete is 210mm, it is classified as low-viscosity concrete. Therefore, the first measurement mode should be used to measure the concrete depth.

[0049] S300: The control and measurement device executes the first or second measurement mode corresponding to the target measurement mode to measure the depth of the concrete surface from the ground and obtain the depth value.

[0050] After obtaining the corresponding target measurement mode (first measurement mode or second measurement mode), the specific measurement process of the target measurement mode can be executed to detect the target measurement mode.

[0051] Specifically, such as Figure 5 As shown, when executing the first measurement mode, this step specifically includes the following steps: S301a. Confirm the measurement calibration parameters in the measuring device. The measurement calibration parameters are used to provide a reference for depth measurement. In this step, it is necessary to determine the measurement calibration parameters in the measuring device in advance. This is because the depth measurement of the measuring device itself depends on factors such as the rotation of the step counting wheel 9 and the length of the rope 5. The determination of the circumference of the step counting wheel 9 itself is the key to converting the rotation angle into a depth value. Therefore, the measurement calibration parameters (e.g., the circumference data of the step counting wheel 9 itself) should be confirmed at the beginning of the measurement to prevent the measurement calibration parameters from being in a state that needs to be updated, which would affect the accuracy of the depth measurement.

[0052] S302a: Power on the control motor assembly to drive the drum 2 to rotate, thereby releasing the depth measuring element 3 to the concrete surface to be measured. At this time, the position sensing switch 4 is pressed by the depth measuring element 3 and is in the conducting state; the depth measuring element 3 moves to the concrete surface to be measured via the step counting wheel 9. After the control motor assembly is powered on, the motor assembly drives the drum 2 to rotate, releasing the depth measuring device 3 onto the concrete surface. The position sensing switch 4 is activated by the contact link 11 due to the gravity of the hoisting rope 5 and the counterweight 6, and the depth strategy task begins to be executed.

[0053] S303a. Monitor the state switching of the position sensing switch 4, and determine if the position sensing switch 4 switches from the on state to the off state, and obtain the rotation information of the step counting wheel 9. Based on the automatic measurement characteristics of the measuring device, it is necessary to monitor the state switching of the position sensing switch 4 in real time. When the counterweight 6 touches the bottom, the tension of the suspension rope 5 disappears, and the pressing force of the contact link 11 on the position sensing switch 4 also disappears. The position sensing switch 4 resets and switches from the on state to the off state. When this state change is detected, the controller can perform depth calculation by collecting the rotation information (rotation angle, cumulative rotation angle, and rotation direction, etc.) of the step counting wheel 9 obtained by the encoder 10.

[0054] S304a. Based on rotation information, the depth between the ground and the concrete surface to be measured is calculated.

[0055] In simple terms, the circumference of the step counting wheel 9 is a known fixed value, which is a key parameter for measuring depth. As the step counting wheel 9 rotates with the movement of the suspension rope, the encoder can accurately acquire the real-time rotation angle, accumulated rotation angle, and rotation direction of the wheel, thereby converting this into the length of the suspension rope 5 lowered. This lowered length can then be used as the calculated depth value. For example, if the circumference of the step counting wheel 9 is 10 centimeters, when the wheel 9 rotates one full revolution, that is, when the rotation angle is 360°, it means that the suspension rope 5 has been lowered by 10 centimeters.

[0056] Specifically, such as Figure 6 As shown, when executing the second measurement mode, step S300 specifically includes the following steps: S301b: Confirm the measurement calibration parameters in the measuring device. The measurement calibration parameters are used to provide a reference for depth measurement. S302b: Power on the control motor assembly to drive the drum 2 to rotate, thereby releasing the depth measuring element 3 to the concrete surface to be measured. At this time, the position sensing switch 4 is pressed by the depth measuring element 3 and is in the conducting state. The depth measuring element 3 moves to the concrete surface to be measured via the step counting wheel 9, and a pressure sensor is provided at the bottom of the depth measuring element 3. In the second measurement mode, unlike the first measurement mode, a pressure sensor is introduced at the bottom of the depth measuring component 3. The impact force collected by the pressure sensor is used as a factor to determine the bottom contact of the hammer, ensuring the accuracy of the depth measurement of the high-viscosity concrete surface.

[0057] S303b: Monitor the state switching of the position sensing switch 4 and the impact force signal generated by the pressure sensor, and determine if the position sensing switch 4 switches from the on state to the off state and the value corresponding to the impact force signal is greater than the first preset threshold, and obtain the rotation information of the step counting wheel 9. The process of generating the impact force signal here is as follows: when the hammer touches the concrete surface, its bottom surface is subjected to the supporting force (reaction force) of the concrete surface. This force is transmitted to the miniature pressure sensor through the hammer, and the electrical signal output by the pressure sensor corresponds to the impact force signal / impact force. Therefore, when dealing with high-viscosity concrete, in addition to monitoring the state switching time of the position sensing switch 4, it is also necessary to monitor the impact force signal generated by the pressure sensor. Only when the position sensing switch 4 is switched from the on state to the off state and the value corresponding to the impact force signal is greater than the first preset threshold, it is determined that the hammer has effectively touched the bottom and the rotation information of the step counting wheel 9 is obtained.

[0058] The first preset threshold is a pressure critical value set by humans. Only when the measured impact force is greater than the first preset threshold is it judged as "effective bottoming out", avoiding misjudgment caused by slight contact (such as touching the wall protection slurry or the side wall of the trench or the high viscosity of concrete).

[0059] Further explanation: The first preset threshold can be obtained by repeatedly lowering a drop hammer to a known flat concrete surface under standard concrete mix. For example, by recording the minimum effective bottom contact pressure value collected by the pressure sensor under multiple tests, and then averaging these minimum effective bottom contact pressure values ​​to obtain the target effective bottom contact pressure, the first preset threshold can be calculated.

[0060] S304b: Based on rotation information, the depth between the ground and the concrete surface to be measured is calculated.

[0061] The stop signal for rotation information is determined by both the state switching of position sensing switch 4 and the real-time impact force. When both conditions are met, the depth value between the ground and the concrete surface to be measured is calculated.

[0062] In a preferred embodiment, since both of the aforementioned cases require the step of "confirming the measurement calibration parameters within the measuring device," this step is described in detail below, and includes: Step 1: Obtain the update cycle of the measurement calibration parameters; the measurement calibration parameters shall include at least the actual circumference of the step counting wheel 9; Step 2: When the update cycle is greater than or equal to the preset cycle, a prompt message shall be issued to remind the user that the measurement calibration parameters need to be updated.

[0063] As explained above, the circumference of the step counting wheel 9 is a known fixed value and a key parameter for measuring depth. If this data is inaccurate, the measured depth value will also be inaccurate. Therefore, it is necessary to update the circumference of the step counting wheel 9 periodically to avoid the impact of long-term wear on its actual circumference value. If the device is set to update the data every 20 measurements, then at the start of the measurement, it is necessary to first confirm whether the current measurement calibration parameter update cycle needs to be updated again. For example, if 20 measurements have passed since the last update, then the data should be updated, triggering a prompt message to remind the user to update the measurement calibration parameters. In a practical scenario, the update strategy can be to measure the depth of a concrete surface with a known depth, and then back-calculate and verify the actual circumference of the step counting wheel 9 to update the measurement calibration parameters.

[0064] In a preferred embodiment, such as Figure 7 As shown, for both measurement modes, the calculation principle of "calculating the depth value between the ground and the concrete surface to be measured based on rotation information" is the same, which is elaborated as follows: Step R1: Convert the rotation angle of the step counting wheel 9 into the release length of the suspension rope 5 in the depth measuring component 3, and record the release length as a depth measurement data; Step R2: Control the measuring device to perform a preset number of measurements in the corresponding target measurement mode to obtain multiple sets of depth measurement data; Step R3: Calculate the depth value between the ground and the concrete surface to be measured based on the multiple sets of depth measurement data.

[0065] Since this step has already been explained above, the conversion of rotation information to depth values ​​will not be explained here. The main point is that in the actual depth calculation process, the depth of the concrete surface from the ground needs to be tested multiple times. According to the program design, after generating the first measurement data by executing different measurement modes, this device repeats the measurement at regular intervals (e.g., 5 minutes) until the number of tests reaches the preset number (e.g., 10 times). All depth measurement data will be arranged according to the measurement time and generated into a text file and saved in the controller. The data file can be exported via USB interface. Finally, the final depth value between the ground and the concrete surface to be measured is obtained based on multiple sets of depth measurement data.

[0066] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. An automatic concrete surface depth measuring device, characterized in that, The measuring device is installed on the ground, and the concrete surface of the area to be poured is located below the ground. The measuring device includes: Mounting frame (1), which is mounted on the ground and has a measuring component on it; the measuring component includes: a drum (2), a position sensing switch (4), a depth measuring part, a fixed pulley (8), a step counting wheel (9), and a suspension rope (5); the fixed pulley (8) and the step counting wheel (9) are arranged in cooperation with the drum (2); the suspension rope (5) is guided by the fixed pulley (8) and the step counting wheel (9) and thus released to the concrete surface; A depth measuring element (3) is connected to the drum (2); the position sensing switch (4) is located below the drum (2); the drum (2) is used to release the depth measuring element (3) onto the concrete surface. When the concrete surface depth measurement begins, the position sensing switch (4) is subjected to pressure from the depth measuring element (3), thus being in the conducting state; when the depth measuring element (3) comes into contact with the concrete surface, the pressure applied to the position sensing switch (4) disappears, and the position sensing switch (4) switches to the off state. The depth measuring unit is connected to the position sensing switch (4) and the disconnected state is used as the measurement stop signal to calculate the depth value between the start of the measurement and the receipt of the measurement stop signal; the depth measuring component (3) includes: a suspension rope (5) wound on the drum (2); a counterweight (6) is connected to the bottom of the suspension rope (5), and a pressure sensor is provided at the bottom of the counterweight (6); the drum (2) can release and retract the suspension rope (5) by rotating; The depth measuring unit includes: The controller is connected to the step counting wheel (9) via an encoder (10); A pressure-sensitive link (11) is provided. One end of the pressure-sensitive link (11) is rotatably connected to the mounting bracket (1) via a shaft pin (19), and the other end is connected to the outer shell of the encoder (10). The pressure-sensitive link (11) is located above the position sensing switch (4). When the concrete surface depth measurement begins, the pressure-sensitive link (11) is pressed onto the position sensing switch (4) by the weight of the depth measuring component (3). When the depth measuring component (3) comes into contact with the concrete surface, the pressure-sensitive link (11) stops pressing the position sensing switch (4).

2. The automatic concrete surface depth measuring device according to claim 1, characterized in that, The measuring assembly further includes a spool bearing housing (7), which is disposed on the mounting frame (1) and is used to support the spool (2).

3. The automatic concrete surface depth measuring device according to claim 2, characterized in that, The encoder (10) is connected to the rotation shaft of the step counting wheel (9) and is used to collect the rotation information of the step counting wheel (9) and generate a rotation signal to be transmitted to the controller; wherein, the controller is used to calculate the corresponding depth value based on the rotation information generated by the step counting wheel (9) from the start of the measurement to the receipt of the measurement stop signal.

4. The automatic concrete surface depth measuring device according to claim 1, characterized in that, The measuring device further includes: a motor assembly; the motor assembly includes: The motor (12) is mounted on the mounting bracket (1) and its driving end is connected to one end of the coupling (13). The other end of the coupling (13) is connected to the drum (2). The motor (12) is used to drive the drum (2) to rotate. The motor (12) is a brake motor. When the motor assembly is not powered, the motor (12) is automatically locked by the brake to restrict its rotation.

5. An automatic method for measuring the depth of concrete surface, characterized in that, The automatic concrete surface depth measuring device as described in any one of claims 1-4 is used, and the measuring method includes the following steps: Obtain geological information of the concrete surface to be tested, wherein the geological information includes at least the viscosity of the concrete surface; Based on the current viscosity of the concrete surface, the depth measurement strategy database is invoked to confirm the target measurement mode corresponding to the current viscosity of the concrete surface; the depth measurement strategy database includes at least: viscosity range and measurement mode corresponding to each viscosity range, and the measurement mode includes at least: a first measurement mode and a second measurement mode; The measuring device is controlled to execute either the first or second measuring mode corresponding to the target measuring mode, and the depth of the concrete surface from the ground is measured to obtain a depth value; Controlling the measuring device to execute the first measuring mode corresponding to the target measuring mode, measuring the depth of the concrete surface from the ground, and obtaining the depth value, specifically includes: Confirm the measurement calibration parameters within the measuring device, which are used to provide a reference for depth measurement; The control motor assembly is powered on to drive the drum (2) to rotate, thereby releasing the depth measuring device (3) to the concrete surface to be measured. At this time, the position sensing switch (4) is pressed by the depth measuring device (3) and is in the conducting state; the depth measuring device (3) moves to the concrete surface to be measured via the step counting wheel (9); Monitor the state switching of the position sensing switch (4), and determine if the position sensing switch (4) switches from the on state to the off state, and obtain the rotation information of the step counting wheel (9); Based on the rotation information, the depth between the ground and the concrete surface to be measured is calculated.

6. The automatic method for measuring the depth of concrete surface according to claim 5, characterized in that, The measuring device is controlled to execute a second measuring mode corresponding to the target measuring mode, and the depth of the concrete surface from the ground is measured to obtain a depth value, specifically including: Confirm the measurement calibration parameters within the measuring device, which are used to provide a reference for depth measurement; Power on the control motor assembly to drive the drum (2) to rotate, thereby releasing the depth measuring device (3) to the concrete surface to be tested. At this time, the position sensing switch (4) is pressed by the depth measuring device (3) and is in the conducting state. The depth measuring device (3) moves to the concrete surface to be tested via the step counting wheel (9), and a pressure sensor is provided at the bottom of the depth measuring device (3). Monitor the state switching of the position sensing switch (4) and the impact force signal generated by the pressure sensor, and determine if the position sensing switch (4) switches from the on state to the off state and the value corresponding to the impact force signal is greater than the first preset threshold, and obtain the rotation information of the step counting wheel (9); Based on the rotation information, the depth between the ground and the concrete surface to be measured is calculated.

7. The automatic method for measuring the depth of concrete surface according to claim 6, characterized in that, Confirming the measurement calibration parameters within the measuring device specifically includes: Obtain the update cycle of the measurement calibration parameters; the measurement calibration parameters include at least the actual circumference of the step counting wheel (9); If the update cycle is greater than or equal to the preset cycle, a prompt message is issued to remind the user that the measurement calibration parameters need to be updated.

8. The automatic method for measuring the depth of concrete surface according to claim 6, characterized in that, Based on the rotation information, the depth between the ground and the concrete surface to be measured is calculated, specifically including: The rotation angle of the step counting wheel (9) is converted into the release length of the suspension rope (5) in the depth measuring component (3), and the release length is recorded as a depth measurement data; The measuring device is controlled to perform a preset number of measurements in a corresponding target measurement mode to obtain multiple sets of depth measurement data; Based on multiple sets of depth measurement data, the depth between the ground and the concrete surface to be measured is calculated.

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