Concrete surface depth automatic measuring device and measuring method

Abstract

The invention discloses a device and a method for automatically measuring the depth of a concrete surface, and relates to the technical field of methods for measuring the depth of the concrete surface. The measuring assembly comprises a winding drum, a position sensing switch and a depth measuring part; a depth measuring piece is arranged on the winding drum; the position sensing switch is positioned below the winding drum; when concrete surface depth measurement begins, the position sensing switch is pressed to be in an on state; when the depth measuring piece is in contact with the concrete surface, the pressure applied to the position sensing switch disappears, and the position sensing switch is switched to be in an off state; the depth measuring unit calculates a depth value corresponding to the time from the start of the measurement to the reception of the measurement stop signal. The device can replace manpower to carry out concrete drop hammer measurement, time and labor are saved, convenience and rapidness are achieved, and the measurement efficiency and accuracy can be remarkably improved.

Description

Technical Field

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

[0002] In modern water conservancy and construction projects, underground anti-seepage wall pouring is a critical step. Accurately and promptly measuring the concrete surface rise during the pouring process is crucial for overall construction quality and subsequent process planning. Currently, the industry generally uses the manual drop hammer method to measure the depth of the concrete surface.

[0003] However, this traditional measurement method has numerous flaws that are difficult to ignore. In terms of measurement accuracy, due to differences in operating techniques and feel between technicians, even measurements taken at the same location and time can result in varying depths of concrete surfaces, leading to significant measurement errors. In terms of measurement frequency, construction site technicians often have complex workloads and limited manpower, making frequent concrete depth measurements impossible. This low measurement frequency significantly reduces the value of the data obtained for subsequent construction process statistics, making it difficult for construction personnel to adjust construction strategies based on this data in a timely manner, which can easily lead to construction delays or quality risks. Summary of the Invention

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

[0005] In a first aspect, the present application provides an automatic measuring device for the depth of a concrete surface, wherein the measuring device is installed on the ground, and below the ground is the concrete surface of the area to be poured; The measuring device comprises: A mounting frame, the mounting frame being mounted on the ground and having a measuring assembly disposed thereon; the measuring assembly comprising: a reel, a position sensing switch, and a depth measuring portion; The reel is provided with a depth measuring piece connected thereto; the position sensing switch is located below the reel; the reel is used to release the depth measuring piece toward the concrete surface; When the depth measurement of the concrete surface begins, the position sensing switch is subjected to pressure from the depth measuring member, thereby being in an on state; when the depth measuring member contacts the concrete surface, the pressure applied to the position sensing switch disappears, and the position sensing switch switches to an off state; The depth measuring unit is connected to the position sensing switch signal, and uses the disconnected state as a measurement stop signal to calculate the depth value corresponding to the start of measurement until the measurement stop signal is received.

[0006] According to the technical solution provided in this application, the depth measuring device includes: a sling rope wound around the reel; a counterweight is connected to the bottom of the sling rope, and a pressure sensor is provided at the bottom of the counterweight; the reel can release and recycle the sling rope by rotating.

[0007] According to the technical solution provided in this application, the measuring assembly further includes: a reel bearing seat, the reel bearing seat being arranged on the mounting frame and used to support the reel; A fixed pulley and a pedometer wheel are both arranged on the mounting frame and are arranged in cooperation with the reel; the suspension rope is guided by the fixed pulley and the pedometer wheel, and is thus released toward the concrete surface.

[0008] According to the technical solution provided by this application, the depth measurement unit includes: a controller, the controller being connected to the pedometer wheel signal via an encoder; the encoder being connected to the rotating shaft of the pedometer wheel and configured to collect rotation information of the pedometer wheel and generate a rotation signal transmitted to the controller; wherein the controller is configured to calculate a corresponding depth value based on the rotation information generated by the pedometer wheel between the start of measurement and receipt of a measurement stop signal; A touch-pressure link, one end of which is rotatably connected to the mounting bracket via a shaft pin, and the other end of which is connected to the encoder housing; the touch-pressure link is located above the position sensing switch, and when the depth measurement of the concrete surface begins, the touch-pressure link is pressed onto the position sensing switch by the weight of the depth measuring piece, and when the depth measuring piece contacts the concrete surface, the touch-pressure link stops pressing 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: a motor, the motor being arranged on the mounting frame, and having a driving end connected to one end of a coupling, the other end of which is connected to the reel, and the motor being used to drive the reel to rotate; The motor is a brake motor. When the motor assembly is not powered, the motor is automatically locked by the brake to limit its rotation.

[0010] In a second aspect, the present application provides a method for automatically measuring the depth of a concrete surface, which is applied to the above-mentioned automatic depth measuring device. The method comprises the following steps: Acquiring geological information of the concrete surface to be tested, wherein the geological information at least includes: viscosity of the concrete surface; Based on the current viscosity of the concrete surface, calling a depth measurement strategy database to determine a target measurement mode corresponding to the current viscosity of the concrete surface; the depth measurement strategy database includes at least viscosity ranges and measurement modes corresponding to each viscosity range, the measurement modes including at least a first measurement mode and a second measurement mode; The measuring device is controlled to execute a first measuring mode or a second measuring mode corresponding to a 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 by the present application, controlling the measuring device to execute the first measurement mode corresponding to the target measurement mode, measuring the depth of the concrete surface from the ground, and obtaining a depth value specifically includes: confirming measurement calibration parameters in the measurement device, wherein the measurement calibration parameters are used to provide a reference for depth measurement; The motor assembly is controlled to be powered on to drive the drum to rotate, thereby releasing the depth measuring member toward the concrete surface to be measured. At this time, the position sensing switch is pressed by the depth measuring member and is in a conducting state; the depth measuring member moves toward the concrete surface to be measured via the pedometer wheel; monitoring the state switching of the position sensing switch, and determining if the position sensing switch switches from the on state to the off state, obtaining the rotation information of the pedometer wheel; Based on the rotation information, a depth value between the ground and the concrete surface to be measured is calculated.

[0012] According to the technical solution provided by the present application, controlling the measuring device to execute a second measurement mode corresponding to the target measurement mode to measure the depth of the concrete surface from the ground to obtain a depth value specifically includes: confirming measurement calibration parameters in the measurement device, wherein the measurement calibration parameters are used to provide a reference for depth measurement; The motor assembly is controlled to be powered on to drive the drum to rotate, thereby releasing the depth measuring member toward the concrete surface to be measured. At this time, the position sensing switch is pressed by the depth measuring member and is in a conducting state. The depth measuring member moves toward the concrete surface to be measured via the pedometer wheel, and a pressure sensor is provided at the bottom of the depth measuring member. monitoring the state switching of the position sensing switch and the impact force signal generated by the pressure sensor, and determining if the position sensing switch switches from the on state to the off state and a value corresponding to the impact force signal is greater than a first preset threshold, obtaining the rotation information of the pedometer wheel; Based on the rotation information, a depth value between the ground and the concrete surface to be measured is calculated.

[0013] According to the technical solution provided in this application, confirming the measurement calibration parameters in the measuring device specifically includes: Obtaining an update period of the measurement calibration parameters; the measurement calibration parameters at least include: the actual circumference of the pedometer wheel; When the update period is greater than or equal to a preset period, a prompt message is issued, and the prompt message is used to prompt the user that the measurement calibration parameters need to be updated.

[0014] According to the technical solution provided by the present application, the depth value between the ground and the concrete surface to be measured is calculated based on the rotation information, specifically including: Converting the rotation angle of the pedometer wheel into a released length of the sling in the depth measuring member, and recording the released length as one depth measurement data; Controlling the measuring device to perform a preset number of measurements in a corresponding target measurement mode to obtain multiple sets of depth measurement data; The depth value between the ground and the concrete surface to be measured is calculated based on multiple sets of depth measurement data.

[0015] To sum up, the present technical solution specifically discloses an automatic measuring device and method for the depth of a concrete surface, wherein the measuring device includes: a mounting frame, the mounting frame is installed on the ground, and a measuring component is arranged on it; the measuring component includes: a reel, a position sensing switch and a depth measuring part; a depth measuring piece is arranged on the reel; the position sensing switch is located below the reel; the reel is used to release the depth measuring piece to the concrete surface; at the beginning of the depth measurement of the concrete surface, the position sensing switch is subjected to the pressure applied by the depth measuring piece, and is thus in a conductive state; when the depth measuring piece contacts the concrete surface, the pressure applied to the position sensing switch disappears, and the position sensing switch is switched to a disconnected state; the depth measuring part is connected to the position sensing switch signal, and the disconnected state is used as a measurement stop signal to calculate the depth value corresponding to the start of the measurement to the receipt of the measurement stop signal.

[0016] Existing concrete surface depth measurements mostly use the manual hanging hammer measurement method. However, due to differences in operating techniques and feel among different technicians, and the complexity of the operation, this measurement method is not only time-consuming and labor-intensive, but also prone to large errors in the measurement data. The present application designs an automatic measuring device that uses the gravity of the depth measuring piece on the position sensing switch during the release process as the starting recording moment, and the moment when the depth measuring piece touches the bottom and the pressure on the position sensing switch disappears as the measurement stop moment. The depth measuring unit automatically monitors the entire measurement interval, thereby clarifying the data record corresponding to the depth measurement; the device replaces manual measurement, realizes the automation of depth measurement, and eliminates the data differences caused by manual measurement, thereby improving measurement accuracy and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

[0020] Figure 4 The figure is a flow chart of an automatic measurement method for concrete surface depth.

[0021] Figure 5 4 is a flow chart of a first measurement mode corresponding to step S300 in a method for automatically measuring the depth of a concrete surface.

[0022] Figure 6 4 is a flow chart of a second measurement mode corresponding to step S300 in a method for automatically measuring the depth of a concrete surface.

[0023] Figure 7 The figure shows the process flow of depth calculation in an automatic measurement method of concrete surface depth.

[0024] Numbers in the figure: 1. Mounting frame; 111. Structural plate; 112. Extension plate; 113. Bottom plate; 2. Reel; 3. Depth measuring piece; 4. Position sensing switch; 5. Lifting rope; 6. Counterweight; 7. Reel bearing seat; 8. Fixed pulley; 9. Pedometer wheel; 10. Encoder; 11. Touch-pressure connecting rod; 12. Motor; 13. Coupling; 14. Motor fixing seat; 15. Rope cleaning brush; 16. Indicator light strip; 17. Control display; 18. Fixing bolt; 19. Axle pin. DETAILED DESCRIPTION

[0025] The present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the relevant invention and are not intended to limit the invention. It should also be noted that, for ease of description, only portions relevant to the invention are shown in the accompanying drawings.

[0026] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0027] Example 1 Please refer to Figure 1 and Figure 3 The following is a schematic diagram of the overall structure of an automatic concrete surface depth measurement device provided by this embodiment, along with an enlarged view of the measurement components. This device is proposed to address the current problems of low efficiency, low accuracy, and poor automation in concrete surface depth measurement. The device includes: The mounting frame 1 is installed on the ground and is provided with a measuring assembly; the measuring assembly includes: a reel 2, a position sensing switch 4 and a depth measuring part; The drum 2 is provided with a depth measuring piece 3 connected thereto; a position sensing switch 4 is located below the drum 2; the drum 2 is used to release the depth measuring piece 3 toward the concrete surface; At the beginning of the concrete surface depth measurement, the position sensing switch 4 is in the on state due to the pressure applied by the depth measuring member 3. When the depth measuring member 3 contacts 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 part is connected to the position sensing switch 4 by signal, and the disconnected state is used as the measurement stop signal to calculate the depth value corresponding to the start of measurement until the measurement stop signal is received.

[0028] In the embodiment of the present application, the mounting frame 1 is the structural carrier of the entire automatic depth measuring device, and during use, it needs to be stably placed on the ground based on the structural design of the mounting frame 1 to ensure that subsequent measurement work is carried out stably, for example Figure 1 As shown, the frame of the mounting frame 1 has a structural plate 111 with a protrusion in the middle (a bottom plate 113 is provided under the structural plate), and the two sides of the protrusion are horizontal extension plates 112; the bottom plate 113 and the structural plate 111 can provide installation space for the measuring component and the motor component, and the extension plate 112 is used for stable contact with the ground; the reel 2 in the measuring component is used to drive the depth measuring piece 3 to move toward the concrete surface below the ground; it should be noted that the depth measuring piece 3 here needs to have a certain weight, thereby pressing the position sensing switch 4, and the position sensing switch 4 is the trigger button for automatic measurement. When the depth of the concrete surface is below the ground, the reel 2 is used to drive the depth measuring piece 3 to move toward the concrete surface below the ground; it should be noted that the depth measuring piece 3 here needs to have a certain weight, thereby pressing the position sensing switch 4, and the position sensing switch 4 is the trigger button for automatic measurement. When the depth measurement starts, the drum 2 releases the depth measuring piece 3 downward. At this time, the position sensing switch 4 is pressed by the depth measuring piece 3 and is in the on state, which means the start of depth measurement; when the depth measuring piece 3 contacts the concrete surface, the force exerted by the depth measuring piece 3 on the position sensing switch 4 disappears, the position sensing switch 4 is reset, the signal is disconnected, and the position sensing switch 4 switches from the on state to the off state; the depth measurement part is connected with the position sensing switch 4 signal, and can monitor the triggering moment of the on state and the off state, so as to accurately control the time interval corresponding to the depth measurement and calculate a more accurate depth value.

[0029] It can be seen from this that the present application can replace manual concrete hammer measurement, saving time and effort, being convenient and fast, and can significantly improve measurement efficiency; at the same time, it also eliminates the data differences caused by manual measurement, improves measurement accuracy and the intelligence level of the construction site. In actual applications, the precise measurement of the depth of the concrete surface can reach ±1cm, or even more accurate measurement data; on this basis, it can ensure that the thickness of the concrete protective layer is more in line with the design requirements, which helps to ensure the strength and stability of the concrete structure, extend the service life of the building, and provide an accurate basis for subsequent construction processes, thereby improving construction efficiency.

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

[0031] The depth measuring part 3 can be selected from a lifting rope 5 and a counterweight 6. The lifting rope 5 is wound on the drum 2 and can be retracted and extended under the rotation of the drum 2. The lifting rope 5 here is a high-strength, low-elasticity, corrosion-resistant rope, and its free end is connected to a counterweight 6; the counterweight 6 here can be a hanging hammer (the hanging hammer is an inverted cone-shaped hard, high-density part with a smooth surface, coated with a polytetrafluoroethylene anti-stick layer, and the lower surface is flat), or it can be other structures with a smooth bottom and a certain weight. The specific weight needs to be debugged according to the trigger sensitivity of the position sensing switch 4; in order to increase the anti-interference ability of the depth measuring part 3, a miniature pressure sensor is also provided 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 bottoming of the measuring device due to differences in concrete viscosity or touching the slot wall or other structures, thereby improving the versatility and accuracy of the measuring device.

[0032] In a preferred embodiment, if Figure 2 and Figure 3 As shown, the measuring assembly further includes: a reel bearing seat 7, which is arranged on the mounting frame 1 and is used to support the reel 2; The fixed pulley 8 and the pedometer wheel 9 are both arranged on the mounting frame 1 and are arranged in cooperation with the reel 2; the suspension rope 5 is guided by the fixed pulley 8 and the pedometer wheel 9 and is thus released to the concrete surface.

[0033] Specifically, the reel bearing seat 7 is arranged on the structural plate 111, and the reel bearing seat 7 is used to support the rotation of the reel 2; the fixed pulley 8 and the pedometer wheel 9 are respectively arranged on the inner side of the structural plate 111 and the bottom plate 113, and the fixed pulley 8 is used to provide a guide for the suspension rope 5 to ensure that the suspension rope can fit with the pedometer wheel 9 when it is retracted or released, and the circumference of the pedometer wheel 9 is a known fixed value. When the suspension rope 5 is retracted or released, it will drive the pedometer wheel 9 to rotate without sliding. For each unit length of the suspension rope 5 that is retracted or released, the corresponding pedometer wheel 9 will rotate by the corresponding arc length. According to the rotation data of the pedometer wheel 9, the retracted or released 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 comprises: A controller, the controller being connected to the pedometer wheel 9 signal via an encoder 10; the encoder 10 being connected to the rotating shaft of the pedometer wheel 9, and being used to collect rotation information of the pedometer wheel 9 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 pedometer wheel 9 between the start of measurement and the receipt of the measurement stop signal; The touch-pressure link 11 has one end that is rotatably connected to the mounting bracket 1 via the axle pin 19, and the other end that is connected to the housing of the encoder 10. The touch-pressure link 11 is located above the position sensing switch 4. When the depth measurement of the concrete surface begins, the touch-pressure link 11 is pressed against the position sensing switch 4 by the weight of the depth measuring piece 3. When the depth measuring piece 3 contacts the concrete surface, the touch-pressure link 11 stops pressing the position sensing switch 4.

[0035] Specifically, the controller is the calculation and processing center of the entire measuring device, see Figure 1 The control display 17 in the device is integrated with a processing chip and includes a built-in battery, wireless hotspot module, controller, display, and switch. When the external power supply is cut off, the built-in battery can serve as a backup power source for the device. The controller is connected to the pedometer wheel 9 via a cable to obtain data collected by the encoder and the signal triggered by the monitoring 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 through the hotspot network connected to the device. In the external terminal, the dedicated software of the device can be used to set measurement intervals, manually insert measurement points, save files, draw charts, and other functions.

[0036] In addition, the device is provided with an indicator light strip 16 on the edge of the mounting frame 1. The indicator light strip 16 used is a three-color LED light strip, which can switch between red, green and yellow according to the function setting 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 lifted, the yellow indicator light is on when the motor exceeds the set torque, and the built-in battery is used for power supply when the external power supply is cut off. The specific switching function can be set according to actual conditions.

[0037] The position sensing switch 4 has a built-in spring button, and the surface of the button contacts the pressure link 11. When the pedometer wheel 9 is subjected to pressure from the hanging rope, the pressure link 11 will press the position sensing switch 4, and the built-in spring of the switch will be compressed. The sensing switch will send a conduction signal to the controller. When the pressure of the pedometer wheel 9 disappears, the position sensing switch 4 will automatically reset under the action of the spring, the conduction signal will disappear, and it will switch to a disconnection signal. Since the axis of the encoder 10 is fixed together with the axis hole of the pedometer wheel 9, the real-time rotation angle, accumulated rotation angle, and rotation direction of the pedometer wheel 9 can be measured and output to the controller. The controller calculates the depth value based on the circumference of the pedometer wheel 9.

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

[0039] Specifically, the motor 12 is fixed to the mounting frame 1 by fixing bolts 18, the driving 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, and the brake will automatically lock when the motor assembly is not powered, limiting the rotation of the motor and ensuring the measurement stability of the measuring device.

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

[0041] Based on the above description, combined with Figure 1 、 Figure 2 and Figure 3 , the embodiment of the present application proposes an automatic measurement device for the depth of a concrete surface, and its specific working principle is as follows: Place the measuring device on the ground below which the concrete surface of the area to be poured will be located.

[0042] By powering up the motor assembly, the drum 2 is controlled to rotate, so that the drum 2 drives the counterweight 6 connected by the rope 5 on the ground to be released downward, that is, to move toward the direction close to the concrete surface; since the rope 5 is released downward through the fixed pulley 8 and the pedometer wheel 9 in sequence, and the counterweight 6 itself has a certain weight, the rope 5 will carry a certain weight when passing through the pedometer wheel 9, and this weight will also act on the touch-pressure link 11 matched with the pedometer wheel 9, so that the touch-pressure link 11 presses the position sensing switch 4 below, making it enter the conducting state; when the rope 5 continues to be released downward until the counterweight 6 touches the concrete surface, the rope 5 will be released downward until the counterweight 6 touches the concrete surface. Surface contact. Since the concrete surface provides support for the counterweight 6, the tension in the rope 5 disappears. At this time, the pressing force exerted by the rope 5 on the position sensing switch 4 through the contact-pressure connecting rod 11 also disappears, and the position sensing switch 4 is reset, switching from the on state to the off state. After receiving the disconnection signal from the position sensing switch 4, the controller records the current time point and calculates the corresponding depth value based on the rotation information corresponding to the pedometer wheel 9. At this time, the motor 12 can also be controlled to reverse until the hammer returns to its initial position. This measuring device effectively reduces the errors caused by manual operation and greatly improves the measurement accuracy. For example, when different technicians use manual hammer measurements, differences in operating techniques and hand feel will result in different measurement results. However, this device effectively avoids such problems on the basis of adding intelligent control.

[0043] Example 2 Based on the automatic concrete surface depth measurement device proposed in the embodiment, the present application proposes an automatic concrete surface depth measurement method. This method aims to solve the problem that the traditional method of determining bottoming out (relying on mechanical force transmission) using only the "disappearance of rope tension" to determine concrete surfaces of different properties cannot meet the engineering depth measurement requirements. For example, when measuring the depth of a low-viscosity, high-flow concrete surface, the pendulum in the measuring device will quickly stop falling due to buoyancy or surface tension after contacting the concrete surface, and the rope tension will drop sharply to near zero. Since the tension disappearance signal is clear, the switching of the position sensing switch 4 can be quickly controlled. However, in actual applications, we found that when faced with a concrete surface with low concrete slump (such as ≤150mm) and high viscosity, the hammer may slowly sink due to viscous resistance after contacting the surface, and the tension may not completely disappear (there is still some drag force), which can easily lead to the misjudgment of "the tension has not dropped sharply but has actually bottomed out". In addition, the depth measurement scenario is complex. If only the "disappearance of the rope tension" is used as a signal, it is also necessary to ensure that the wall retaining slurry in the slot hole has not shown abnormal thickening or precipitation, that the tension has not decayed prematurely due to slurry resistance during the lowering of the hammer, and that the measuring device has no mechanical jamming or slipping. These multiple information are needed to ensure that the tension change truly reflects the stress state of the hammer and the depth measurement is accurate.

[0044] In view of this, if Figure 4-Figure 7As shown, the embodiment of the present application proposes a method for automatically measuring the depth of a concrete surface. In combination with considerations in practical applications, a single judgment is converted into multiple adaptive judgments, thereby ensuring the accuracy of the measuring device, adaptability to multiple scenarios, and anti-interference ability. Specifically, the measurement method includes the following steps: S100, obtaining geological information of a concrete surface to be tested, the geological information at least including: viscosity of the concrete surface; In the embodiment of the present application, the first step is to obtain geological information of the concrete surface. The geological information here may include viscosity and corresponding fluidity. The acquisition method can be obtained through data acquisition or early survey records, etc. The specific method is not limited. The viscosity here is divided into two categories: low viscosity and high viscosity in the embodiment of the present application. Generally, in the field of construction engineering, concrete viscosity is often measured by slump. The slump of low-viscosity concrete is ≥200mm, and the slump of high-viscosity concrete is ≤150mm. However, due to different materials, proportions and testing methods, the actual range varies. In addition, the viscosity of concrete is also affected by factors such as admixtures and temperature, so it is not specifically limited.

[0045] S200, based on the current viscosity of the concrete surface, calling a depth measurement strategy database to determine a target measurement mode corresponding to the current viscosity of the concrete surface; the depth measurement strategy database includes at least viscosity ranges and measurement modes corresponding to each viscosity range, and the measurement modes include at least a first measurement mode and a second measurement mode; Based on the aforementioned classification criteria, in this application, concrete viscosity is divided into 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] An example of 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 with practical application, for example, if the slump of the current concrete is 210 mm, it is low-viscosity concrete, so the first measurement mode should be used to measure the depth of the concrete.

[0049] S300: Control the measuring device to execute the first measuring mode or the second measuring mode corresponding to the target measuring mode, measure the depth of the concrete surface from the ground, and obtain a depth value.

[0050] After obtaining the corresponding target measurement mode (the first measurement mode or the second measurement mode), the specific measurement process of the target measurement mode may be performed to thereby detect and obtain the target measurement mode.

[0051] Specifically, if Figure 5 As shown, when executing the first measurement mode, this step specifically includes the following steps: S301a, confirming measurement calibration parameters in the measurement device, where the measurement calibration parameters are used to provide a reference for depth measurement; In this step, the measurement calibration parameters in the measuring device need to be determined in advance. This is because the depth measurement of the measuring device itself depends on factors such as the rotation of the pedometer wheel 9 and the retracted and extended length of the hanging rope 5. The determination of the circumference of the pedometer wheel 9 itself is the key to converting the rotation angle into a depth value. Therefore, the measurement calibration parameters (for example, the circumference data of the pedometer wheel 9 itself) must be confirmed at the beginning of the measurement to prevent the measurement calibration parameters from being in a state that needs to be updated at this time, which will affect the accuracy of the depth measurement.

[0052] S302a, the motor assembly is powered on to drive the drum 2 to rotate, thereby releasing the depth measuring member 3 toward the concrete surface to be measured. At this time, the position sensing switch 4 is pressed by the depth measuring member 3 and is in the on state; the depth measuring member 3 moves toward the concrete surface to be measured via the pedometer wheel 9; After the control motor assembly is powered on, the motor assembly drives the drum 2 to rotate, releasing the depth measuring piece 3 to the concrete surface. The position sensing switch 4 is pressed and turned on by the contact connecting rod 11 due to the gravity of the suspension rope 5 and the counterweight 6, and the depth strategy task begins to be executed.

[0053] S303a, monitoring the state switching of the position sensing switch 4, and determining if the position sensing switch 4 switches from the on state to the off state, obtaining the rotation information of the pedometer 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 pressure link 11 on the position sensing switch 4 also disappears, and the position sensing switch 4 is reset. The position sensing switch 4 switches from the on state to the off state. When this state change is detected, the controller can perform depth calculation based on the rotation information (rotation angle, accumulated rotation angle, and rotation direction, etc.) of the pedometer wheel 9 collected by the encoder 10.

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

[0055] Simply put, the circumference of the pedometer wheel 9 is a known, fixed value, a key parameter for measuring depth. As the pedometer wheel 9 rotates with the movement of the sling, the encoder accurately captures the wheel's real-time rotation angle, the accumulated rotation angle, and the direction of rotation, thereby converting it into the length of the sling 5 lowered. This lowered length serves as the calculated depth value. For example, if the circumference of the pedometer wheel 9 is 10 cm, then when the pedometer wheel 9 rotates one full circle (i.e., a rotation angle of 360°), it means that the sling 5 has lowered 10 cm.

[0056] Specifically, if Figure 6 As shown, when the second measurement mode is executed, 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. Control the motor assembly to power on to drive the reel 2 to rotate, thereby releasing the depth measuring member 3 toward the concrete surface to be measured. At this time, the position sensing switch 4 is pressed by the depth measuring member 3 and is in the conductive state. The depth measuring member 3 moves toward the concrete surface to be measured via the pedometer wheel 9. A pressure sensor is provided at the bottom of the depth measuring member 3. In the second measurement mode, unlike the first measurement mode, a pressure sensor is provided at the bottom of the depth measuring member 3. At the same time, the impact force collected by the pressure sensor is used as a judgment factor for whether the hammer has hit the bottom, ensuring accurate depth measurement of the high-viscosity concrete surface.

[0057] S303b, monitoring the state switching of the position sensing switch 4 and the impact force signal generated by the pressure sensor, and determining 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 a first preset threshold, obtaining the rotation information of the pedometer wheel 9; The impact force signal is generated as follows: When the pendulum hits the concrete surface, its bottom surface is supported by the concrete surface (reaction force). This force is transmitted to the micro pressure sensor through the pendulum. The electrical signal output by the pressure sensor corresponds to the impact force signal / impact force. Therefore, when facing high-viscosity concrete, in addition to monitoring the state switching moment of the position sensing switch 4, it is also necessary to monitor the impact force signal generated by the pressure sensor. When it is found that 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, it is determined that the pendulum has effectively bottomed out at this time and the rotation information of the pedometer wheel 9 is obtained.

[0058] The first preset threshold is an artificially set pressure critical value. 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 slurry or the side wall of the slot or high concrete viscosity).

[0059] Further explanation: The first preset threshold value can be obtained by testing the standard concrete mix ratio by lowering a hanging hammer onto a known flat concrete surface multiple times. For example, the minimum effective bottoming pressure values obtained by the pressure sensor under multiple tests are recorded, and then these minimum effective bottoming pressure values are averaged to obtain the target effective bottoming pressure, and finally the first preset threshold value is calculated.

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

[0061] The stop signal of the rotation information is determined by both the state switching of the 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 above situations require the execution of the step of "confirming the measurement calibration parameters in the measuring device", this step is described in detail below. The step includes: Step 1: Obtain the update period of the measurement calibration parameters; the measurement calibration parameters include at least: the actual circumference of the pedometer wheel 9; Step 2: When the update period is greater than or equal to the preset period, a prompt message is issued, which is used to prompt the user that the measurement calibration parameters need to be updated.

[0063] Combined with the above description, it can be seen that the circumference of the pedometer wheel 9 is a known fixed value and is also a key parameter for measuring depth. If the data is inaccurate, the measured depth value will also be inaccurate. Here, the circumference of the pedometer wheel 9 needs to be updated regularly to avoid the long-term wear of the pedometer wheel 9 affecting its actual circumference value. If the update cycle set by this device is to update the data once every 20 measurements, then at the beginning of the measurement, it is necessary to first confirm whether the update cycle of the current measurement calibration parameters needs to be updated again. For example, if it has reached 20 times since the last update, then the data should be updated at this time, triggering a prompt message to prompt the user to update the measurement calibration parameters; in actual scenarios, the update strategy can measure the depth of a concrete surface of known depth, and then reversely calculate and verify the actual circumference of the pedometer wheel 9 to update the measurement calibration parameters.

[0064] In a preferred embodiment, if Figure 7 As shown, for both measurement modes, the calculation principle of the step of "calculating the depth value between the ground and the concrete surface to be measured based on the rotation information" is the same, which is specifically expanded as follows: Step R1: Convert the rotation angle of the pedometer wheel 9 into the release length of the hanging rope 5 in the depth measuring member 3, and record the release length as one depth measurement data; Step R2: Control the measuring device to perform a preset number of measurements in a 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 been explained in the previous content, the conversion of rotation information to depth value 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, this device generates the first measurement data by executing different measurement modes, and then repeats the measurement once every certain time (such as 5 minutes) until the number of tests reaches the preset number (such as 10 times); all depth measurement data will be arranged according to the measurement time and generate a text file saved in the controller. The data file can be exported through the USB interface. Finally, based on multiple sets of depth measurement data, the final depth value between the ground and the concrete surface to be measured is obtained.

[0066] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention herein is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features having similar functions disclosed in this application.

Claims

1. A device for automatically measuring the depth of a concrete surface, characterized in that: The measuring device is installed on the ground, and below the ground is the concrete surface of the area to be poured; The measuring device comprises: A mounting frame (1), the mounting frame (1) being mounted on the ground and having a measuring assembly disposed thereon; the measuring assembly comprising: a reel (2), a position sensing switch (4) and a depth measuring portion; The reel (2) is provided with a depth measuring piece (3) connected thereto; the position sensing switch (4) is located below the reel (2); the reel (2) is used to release the depth measuring piece (3) toward the concrete surface; When the depth measurement of the concrete surface begins, the position sensing switch (4) is subjected to pressure applied by the depth measuring member (3), thereby being in an on state; when the depth measuring member (3) contacts the concrete surface, the pressure applied to the position sensing switch (4) disappears, and the position sensing switch (4) switches to an off state; The depth measuring unit is in signal communication with the position sensing switch (4), and uses the disconnected state as a measurement stop signal to calculate the depth value corresponding to the start of measurement until the measurement stop signal is received.

2. The automatic measuring device for concrete surface depth according to claim 1, characterized in that: The depth measuring member (3) comprises: a sling (5) wound around the reel (2); a counterweight (6) connected to the bottom of the sling (5), and a pressure sensor provided at the bottom of the counterweight (6); and the reel (2) can release and recycle the sling (5) by rotating.

3. The automatic measuring device for concrete surface depth according to claim 2, characterized in that: The measuring assembly further comprises: a reel bearing seat (7), the reel bearing seat (7) being arranged on the mounting frame (1) and being used to support the reel (2); A fixed pulley (8) and a pedometer wheel (9), wherein the fixed pulley (8) and the pedometer wheel (9) are both arranged on the mounting frame (1) and are arranged in cooperation with the reel (2); the suspension rope (5) is guided by the fixed pulley (8) and the pedometer wheel (9) and is thereby released toward the concrete surface.

4. The automatic measuring device for the depth of a concrete surface according to claim 3, characterized in that: The depth measuring unit includes: A controller, the controller being connected to the pedometer wheel (9) signal via an encoder (10); the encoder (10) being connected to the rotating shaft of the pedometer wheel (9) for collecting rotation information of the pedometer wheel (9) and generating a rotation signal transmitted to the controller; wherein the controller is used to calculate a corresponding depth value based on the rotation information generated by the pedometer wheel (9) between the start of measurement and the receipt of a measurement stop signal; A touch-pressure link (11), one end of which is rotatably connected to the mounting frame (1) via a shaft pin (19), and the other end of which is connected to the housing of the encoder (10); the touch-pressure link (11) is located above the position sensing switch (4); when the depth measurement of the concrete surface begins, the touch-pressure link (11) is pressed onto the position sensing switch (4) by the weight of the depth measuring member (3); when the depth measuring member (3) contacts the concrete surface, the touch-pressure link (11) stops pressing the position sensing switch (4).

5. The automatic measuring device for concrete surface depth according to claim 1, characterized in that: The measuring device further comprises: a motor assembly; the motor assembly comprises: a motor (12), the motor (12) being arranged on the mounting frame (1), and having a driving end connected to one end of a coupling (13), the other end of the coupling (13) being connected to the reel (2), the motor (12) being used to drive the reel (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 limit its rotation.

6. A method for automatically measuring the depth of a concrete surface, characterized in that: The automatic measuring device for concrete surface depth according to any one of claims 1 to 5 is used, and the measuring method comprises the following steps: Acquiring geological information of the concrete surface to be tested, wherein the geological information at least includes: viscosity of the concrete surface; Based on the current viscosity of the concrete surface, calling a depth measurement strategy database to determine a target measurement mode corresponding to the current viscosity of the concrete surface; the depth measurement strategy database includes at least viscosity ranges and measurement modes corresponding to each viscosity range, the measurement modes including at least a first measurement mode and a second measurement mode; The measuring device is controlled to execute a first measuring mode or a second measuring mode corresponding to a target measuring mode, and the depth of the concrete surface from the ground is measured to obtain a depth value.

7. The method for automatically measuring the depth of a concrete surface according to claim 6, characterized in that: Controlling the measuring device to execute a first measuring mode corresponding to the target measuring mode to measure the depth of the concrete surface from the ground to obtain a depth value specifically includes: confirming measurement calibration parameters in the measurement device, wherein the measurement calibration parameters are used to provide a reference for depth measurement; The motor assembly is controlled to be powered on to drive the reel (2) to rotate, thereby releasing the depth measuring member (3) toward the concrete surface to be measured. At this time, the position sensing switch (4) is pressed by the depth measuring member (3) and is in a conducting state; the depth measuring member (3) moves toward the concrete surface to be measured via the pedometer wheel (9); Monitoring the state switching of the position sensing switch (4), determining if the position sensing switch (4) switches from the on state to the off state, and obtaining the rotation information of the pedometer wheel (9); Based on the rotation information, a depth value between the ground and the concrete surface to be measured is calculated.

8. The method for automatically measuring the depth of a concrete surface according to claim 6, characterized in that: Controlling the measuring device to execute a second measuring mode corresponding to the target measuring mode to measure the depth of the concrete surface from the ground to obtain a depth value specifically includes: confirming measurement calibration parameters in the measurement device, wherein the measurement calibration parameters are used to provide a reference for depth measurement; The motor assembly is controlled to be powered on to drive the reel (2) to rotate, thereby releasing the depth measuring piece (3) toward the concrete surface to be measured. At this time, the position sensing switch (4) is pressed by the depth measuring piece (3) and is in a conducting state; the depth measuring piece (3) moves toward the concrete surface to be measured via the pedometer wheel (9), and a pressure sensor is provided at the bottom of the depth measuring piece (3); Monitoring the state switching of the position sensing switch (4) and the impact force signal generated by the pressure sensor, determining 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 a first preset threshold, and obtaining the rotation information of the pedometer wheel (9); Based on the rotation information, a depth value between the ground and the concrete surface to be measured is calculated.

9. The method for automatically measuring the depth of a concrete surface according to claim 7 or 8, characterized in that: Confirming the measurement calibration parameters in the measurement device, specifically including: Obtaining an update cycle of the measurement calibration parameters; the measurement calibration parameters at least include: the actual circumference of the pedometer wheel (9); When the update period is greater than or equal to a preset period, a prompt message is issued, and the prompt message is used to prompt the user that the measurement calibration parameters need to be updated.

10. The method for automatically measuring the depth of a concrete surface according to claim 7 or 8, characterized in that: Calculating the depth value between the ground and the concrete surface to be measured based on the rotation information specifically includes: Converting the rotation angle of the pedometer wheel (9) into the release length of the hanging rope (5) in the depth measuring member (3), and recording the release length as one depth measurement data; Controlling the measuring device to perform a preset number of measurements in a corresponding target measurement mode to obtain multiple sets of depth measurement data; The depth value between the ground and the concrete surface to be measured is calculated based on multiple sets of depth measurement data.

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