Error-proof measuring device for hollow piles

Abstract

The hollow pile error-proof measuring device comprises a scale, a fixed measuring claw fixed to one end of the scale, a sliding measuring claw in sliding fit with the scale, and an error-proof measuring unit fixed with the sliding measuring claw; the error-proof measuring unit comprises the laser position calibrator for ensuring correct measuring position and reducing errors, a displacement sensor for converting displacement of the sliding measuring claw into data for digital display of readings, a central controller for calculation and implementation of various functions, an electronic display screen for display of data and interactive information, a key for human-computer interaction, and a battery for power supply; the central controller is connected with the laser position calibrator, the displacement sensor, the electronic display screen, the key, and the battery. The present application has the beneficial technical effect of automatically prompting the user to correctly measure the position and effectively avoid measurement errors.

Description

Technical Field

[0001] This invention relates to the field of building technology, and in particular to a hollow pile error measurement device. Background Technology

[0002] The use of hollow square piles has been widely accepted and promoted in the market due to their numerous advantages. Japan, as the inventor of pipe piles, has been promoting their use extensively since the 1960s. In recent years, however, the use of pipe piles has decreased year by year; in 2004, the national usage of pipe piles was less than 5 million meters. Since the development of the new type of square pile in 2000, its usage has accounted for 40% of all pile types, demonstrating the advantages of hollow square piles. The United States is similar to Japan; in 2003, the usage of prestressed hollow square piles reached 90 million meters, accounting for 35% of the total pile usage. In my country, building material manufacturers such as Guangzhou Baiyun District Jianji Cement Products Factory and Dongguan Congshulin Building Materials Co., Ltd. have developed hollow square piles that conform to my country's geological and manufacturing conditions, based on foreign experience, and have been widely used in engineering practice. Analysis of current engineering applications shows that square piles have achieved excellent technical performance advantages.

[0003] Before construction, hollow square piles require on-site inspection. Traditionally, this involves using calipers or a steel ruler to measure the inner diameter and wall thickness on two perpendicular diameters on the same cross-section, and then taking the average value. This measurement ensures that the wall thickness of the hollow square piles is symmetrical upon arrival, preventing cracks caused by uneven stress on the inner wall during use, which could lead to leakage. However, in long-term practical production experience, this traditional inspection method suffers from significant errors in measurement results due to inaccurate measurement tool placement. Summary of the Invention

[0004] The purpose of this invention is to solve the problem of large measurement errors caused by inaccurate measurement positions of measuring tools during the on-site inspection of hollow square piles.

[0005] To address the aforementioned problems, this invention proposes a hollow pile error prevention measurement device, which includes a scale, a fixed measuring claw fixed to one end of the scale, a sliding measuring claw that slides with the scale, and an error prevention measurement unit fixed to the sliding measuring claw; one side of the sliding measuring claw has a fastening screw for fixing the position.

[0006] The scale has an elongated hole along its length, and the sliding measuring claw has a sliding screw that passes through the elongated hole. The sliding damping between the sliding measuring claw and the scale can be adjusted by varying the tightness of the sliding screw.

[0007] The fixed measuring claw is fixed to the scale by screws and a positioning structure. The positioning structure is a combination of positioning pins and positioning holes or a combination of positioning grooves and positioning protrusions.

[0008] The main body of the sliding measuring claw and the fixed measuring claw is a right triangle, with the outer side being the right-angled side and the inner side being the hypotenuse. The front end of the sliding measuring claw and the fixed measuring claw has two straight measuring sections, and the outer side of the measuring section is higher than the outer edge of the main body to ensure that the outer edge of the measuring section contacts the wall of the hollow square pile hole during measurement.

[0009] Preferably, the error-proof measurement unit includes a laser position calibrator and a reflection indicator light for ensuring the correct measurement position; the laser position calibrator has a laser emitter and a reflection receiver on the same side of the fixed measuring jaw and the sliding measuring jaw; the reflection receiver is connected to the reflection indicator light. When the sliding measuring claw begins measuring the inner diameter of the hollow pile, the laser emitter emits a visible laser beam that shines into the inner hole of the hollow pile. When the laser beam passes completely through the inner hole of the hollow pile without reflecting off the inner wall, the receiver does not receive the reflected laser, and the reflection indicator light is off. In this case, the measured diameter is considered to be perpendicular to the axis of the hollow pile, and the measurement error is minimal or negligible. When the fixed measuring claw and the sliding measuring claw have a large difference in height relative to the inner wall of the hollow pile, the laser beam emitted by the laser emitter will reflect off the inner wall. The receiver will then receive the reflected light signal, and the reflection indicator light will illuminate. The illumination status of the reflection indicator light can conveniently indicate a measurement position error, reminding the measuring personnel to adjust the height of the fixed and sliding measuring claws until the reflection indicator light goes out, thereby avoiding measurement errors and ensuring the consistency and accuracy of the measurement data.

[0010] Furthermore, once the measurement is complete, the sliding measuring claw is brought into contact with the fixed measuring claw and zeroed out, and the laser emitter is turned off.

[0011] Furthermore, the following logical relationship can also be adopted: when the reflective receiver receives reflected light, the reflective indicator light is off; when the reflective receiver does not receive reflected light, the reflective indicator light is on, to indicate to the measurer that the measurement position is correct and the measurement data can be read.

[0012] Furthermore, the error prevention measurement unit is fixed to the sliding measurement claw via a sliding mechanism, which allows the error prevention measurement unit to slide along the length of the scale to adjust its position to the middle position between the fixed measurement claw and the sliding measurement claw during measurement, thereby further improving the error prevention capability.

[0013] Another implementation method capable of digitally displaying measurement data is described below. The error-proof measurement unit includes a laser position calibrator for ensuring correct measurement position, a displacement sensor for converting the displacement of the sliding measuring claw into data for digital display, a central controller for calculating and implementing various functions, an electronic display screen for displaying data and interactive information, buttons for human-machine interaction, and a battery for providing power. The central controller is connected to the laser position calibrator, displacement sensor, electronic display screen, buttons, and battery.

[0014] The electronic display screen includes a measurement data display area, a function display area, and a measurement position correct indicator; the data display area is used to display measurement data; the function display area is used to display or select various function menus; the measurement position correct indicator is used to indicate to the user that the current test position is correct when the measurement position is correct, that is, when the transmitter and receiver do not receive reflected light.

[0015] The sliding measuring jaw has a fastening screw for temporary fixation, which restricts the sliding measuring jaw from moving further when it reaches its final position during measurement to fix the reading; the sliding screw passes continuously through the elongated hole on the measuring jaw and the scale and is connected to the back of the error-proof measuring unit.

[0016] The upper edge of the scale also has graduations. The inner diameter of the hollow square pile is read by the position of the left edge of the sliding measuring claw on the scale. When measuring the outer diameter, the fixed value of the width of the jaw measuring section needs to be subtracted from this reading, or the reading can be designed to be taken from the position of the right edge of the sliding measuring claw on the scale. When using a scheme with digital display function, the reading displayed on the electronic display screen shall prevail, and the reading on the scale shall only be used for auxiliary, calibration or accidental situations.

[0017] The displacement sensor employs a capacitive grating sensor, whose structure closely resembles a parallel-plate capacitor. It consists of a group of parallel-plate capacitors arranged in a grid-like structure. If a time-varying periodic signal, controlled by electronic circuitry, is applied to the grids of these sequentially arranged capacitors at different phase distributions at the same instant, the induced signal generated at any given instant on the other common plate will have the same phase distribution as the excitation signal applied at that instant. The main function of the capacitive grating sensor is to convert mechanical displacement into a phase change in an electrical signal, which is then sent to the measurement circuit for data processing. The capacitive grating sensor is controlled by a precision voltage comparator, powered by a relay, and receives the required excitation signal while simultaneously receiving its induced signal. A phase-detection circuit measures the phase difference between the excitation and induced signals, and after a series of changes, the distance moved can be determined.

[0018] The central processing unit adopts a microprocessor, and the output data modes include outer diameter measurement mode, inner diameter measurement mode, measurement position error prevention mode, measurement value accumulation mode, measurement value averaging mode, and measurement value square difference mode. When the measurement error prevention mode is selected to be off, the laser emitter turns off laser emission for use in measurement scenarios where position error prevention is not required.

[0019] The buttons are made of silicone or membrane to enable human-computer interaction operations such as function selection, menu navigation, and function confirmation.

[0020] The battery is a button cell, which provides power to the error-proof measurement unit.

[0021] Uneven wall thickness caused by uneven vibration during inner wall pouring results in an inner wall that does not meet the diameter requirements of the hollow section. On-site inspection of hollow square piles is the first line of defense in ensuring building quality, and reducing measurement errors is crucial for controlling the quality of hollow piles.

[0022] In summary, the adjustable hollow pile measuring device provided by this invention has the beneficial technical effect of automatically prompting the user to correctly measure the position and effectively avoiding measurement errors: Attached Figure Description

[0023] Figure 1 This is a schematic diagram of measuring the inner diameter of a hollow pile in Embodiment 1 of the present invention;

[0024] Figure 2 This is a schematic diagram of measuring the outer diameter of a hollow pile in Embodiment 2 of the present invention;

[0025] Figure 3 This is a schematic diagram of measuring the inner diameter of a hollow pile in Embodiment 3 of the present invention;

[0026] In the diagram: 1. Scale; 2. Fixed measuring jaw; 3. Sliding measuring jaw; 4. Error-proof measuring unit; 5. Fastening screw; 6. Sliding screw; 7. Hollow post; 11. Slender hole; 12. Fixed electrode; 13. Scale; 21. Measuring section; 31. Measuring section; 41. Laser position calibrator; 42. Electronic display screen; 43. Button; 44. Reflection indicator light; 411. Laser emitter; 412. Reflection receiver. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1-3 The technical solutions will be further explained with reference to specific embodiments to help understand the content of the present invention.

[0028] Example 1

[0029] like Figure 1As shown, a hollow pile error prevention measuring device includes a scale 1, a fixed measuring claw 2 fixed to one end of the scale 1, a sliding measuring claw 3 that slides with the scale 1, and an error prevention measuring unit 4 fixed to the sliding measuring claw 3; the sliding measuring claw 3 has a fastening screw 5 on one side for fixing the position.

[0030] The scale 1 has an elongated hole 11 along its length, and the sliding measuring claw 3 has a sliding screw 6 that passes through the elongated hole 11. The sliding damping between the sliding measuring claw 3 and the scale 1 can be adjusted by varying the tightness of the sliding screw 6.

[0031] The fixed measuring claw 2 is fixed to the scale by screws and a positioning structure, wherein the positioning structure is a combination of positioning pins and positioning holes.

[0032] The main body of the sliding measuring claw 3 and the fixed measuring claw 2 is a right triangle, with the outer side being the right-angled side and the inner side being the hypotenuse. The front end of the sliding measuring claw 3 has a measuring section 31 with two straight sides, and the front end of the fixed measuring claw 2 has a measuring section 21 with two straight sides. The outer side of the measuring section 21 or 31 is higher than the outer edge of its main body to ensure that the outer edge of the measuring section 21 or 31 contacts the wall 71 of the hollow square pile 7 during measurement.

[0033] like Figure 1 As shown, the error prevention measurement unit 4 includes a laser position calibrator 41 for preventing measurement errors caused by incorrect measurement position, a displacement sensor (not shown) for converting the displacement of the sliding measuring claw 3 into data for digital display readings, a central controller (not shown) for calculating and implementing various functions, an electronic display screen 42 for displaying data and interactive information, buttons 43 for human-computer interaction, and a battery (built-in, not shown) for providing power; the central controller is connected to the laser position calibrator 41, displacement sensor, electronic display screen 42, buttons 43, and battery.

[0034] The electronic display screen includes a measurement data display area, a function display area, and a measurement position correct indicator.

[0035] The sliding measuring claw 3 has a fastening screw 32 for temporary fixation. During measurement, when the sliding measuring claw 3 moves to the measuring position, it restricts the sliding measuring claw 3 from continuing to move in order to fix the reading. The sliding screw 33 passes through the elongated hole on the front housing of the error-proof measuring unit, the sliding measuring claw 3 and the scale 1 and is connected to the back of the error-proof measuring unit 4.

[0036] The upper edge of the scale 1 also has a scale. The inner diameter of the hollow square pile 7 can be read by the position of the left edge of the sliding measuring claw 3 at the scale 13 on the scale 1. Under normal circumstances, the reading displayed by the error prevention measuring unit shall prevail. The reading of the scale 13 on the scale 1 is only used for auxiliary, calibration or accidental use.

[0037] The displacement sensor employs a capacitive grating sensor, which includes a movable electrode and a fixed electrode. The fixed electrode 12 is mounted on the surface of the error-proof measuring unit 4 that mates with the scale 1. The fixed electrode is mounted on the surface of the scale 1 that mates with the movable electrode (built-in, not shown in the figure). The movable electrode and the fixed electrode 12 are in close contact and slidingly engaged. The movable electrode has multiple emitting electrodes and a long strip-shaped receiving electrode. The fixed electrode 12 has multiple mutually insulated reflective electrodes and a shielding electrode (grounded). An electric field exists between the emitting electrode and the reflective electrode, and between the reflective electrode and the receiving electrode. Due to the capacitive coupling and charge transfer of the reflective electrode, when the movable electrode moves a distance x to the right, the relative area between the emitting electrode and the reflective electrode changes, the amount of charge on the reflective electrode changes, and the charge is transferred to the receiving electrode L. The charge Q accumulated on the receiving electrode is proportional to the displacement x. Thus, the displacement is converted into the accumulated charge Q, and the displacement of the sliding measuring claw or the measured dimension is converted into a digital signal and displayed on the electronic display screen.

[0038] The central processing unit uses a microprocessor, and the output data modes include outer diameter measurement mode, inner diameter measurement mode, measurement position error prevention mode, measurement value accumulation mode, measurement value averaging mode, and measurement value square difference mode.

[0039] The button 43 is a silicone button to enable human-computer interaction operations such as function selection, menu flipping, and function confirmation, including turning the laser position calibrator 41 on or off.

[0040] The battery is a button cell, which provides power to the error-proof measurement unit.

[0041] The laser position calibrator 4 has a laser emitter 411 and a reflection receiver 412 on the same side of the fixed measuring claw 2 and the sliding measuring claw 3. When the sliding measuring claw 3 is moved to start measuring the inner diameter of the hollow pile 7, the laser emitter 411 emits a visible laser beam that irradiates the inner hole of the hollow pile 7. When the laser beam passes completely through the inner hole of the hollow pile 7 and does not irradiate the inner wall of the hollow pile 7 to form a reflection, the reflection receiver 412 does not receive the reflected laser, and the electronic display screen 42 flashes to show the correct measurement position. At this time, it is considered that the measured diameter is perpendicular to the axis of the hollow pile 7, and its measurement error is small or considered to be no measurement error. When the fixed measuring claw 2 and the sliding measuring claw 3 are at the height position of the inner wall of the hollow pile 7... When the difference is large, the laser beam emitted by the laser emitter 411 will irradiate the inner wall of the hollow pile 7 and form reflected light. At this time, the reflection receiver 412 will receive the reflected light signal. The electronic display screen 42 will not display the measurement position correct mark. The display status of the measurement position correct mark can conveniently indicate whether the measurement position is incorrect, reminding the measuring personnel to adjust the height position of the fixed measuring claw 2 and the sliding measuring claw 3 until the measurement position correct mark flashes on the electronic display screen 42, thereby avoiding measurement errors and ensuring the consistency and accuracy of measurement data.

[0042] The laser position calibrator 41 includes a transmitter 411 and a reflection receiver 412 on the same side as the fixed measuring claw and the sliding measuring claw. It utilizes the fact that the laser passes parallel through the inner hole of the hollow pile without reflecting light signals to ensure that the fixed measuring claw 2 and the sliding measuring claw 3 are at the same height on the inner wall of the hollow pile 7, thereby effectively avoiding incorrect measurement positions and improving the accuracy and consistency of the measurement.

[0043] Example 2

[0044] like Figure 2 As shown, this invention proposes a working schematic diagram of a hollow pile anti-error measuring device when measuring the outer diameter. When measuring the outer diameter, the inner side of the measuring section 21 or 31 is clamped to the object being measured, and the value is read through the scale 13 on the ruler; or the outer diameter is measured by setting the button 43 in the anti-error measuring unit 4, and the measured outer diameter can be displayed on the electronic display screen 42. Since the laser emitter 411 is located outside the inner hole area of ​​the hollow square pile, it is not suitable to use the laser position calibrator 41 when measuring the outer diameter.

[0045] The composition and description of each part of the hollow pile error prevention measurement device are the same as those in Example 1, so they will not be repeated here.

[0046] Example 3

[0047] like Figure 3As shown, a simple basic model of a hollow pile error prevention measuring device includes a scale 1, a fixed measuring claw 2 fixed to one end of the scale 1, a sliding measuring claw 3 that slides with the scale 1, and an error prevention measuring unit 4 fixed to the sliding measuring claw 3; the sliding measuring claw 3 has a fastening screw 5 on one side for fixing the position.

[0048] The scale 1 has an elongated hole 11 along its length, and the sliding measuring claw 3 has a sliding screw 6 that passes through the elongated hole 11. The sliding damping between the sliding measuring claw 3 and the scale 1 can be adjusted by varying the tightness of the sliding screw 6.

[0049] The fixed measuring claw 2 is fixed to the scale by screws and a positioning structure, wherein the positioning structure is a combination of positioning pins and positioning holes.

[0050] The main body of the sliding measuring claw 3 and the fixed measuring claw 2 is a right triangle, with the outer side being the right-angled side and the inner side being the hypotenuse. The front end of the sliding measuring claw 3 has a measuring section 31 with two straight sides, and the front end of the fixed measuring claw 2 has a measuring section 21 with two straight sides. The outer side of the measuring section 21 or 31 is higher than the outer edge of its main body to ensure that the outer edge of the measuring section 21 or 31 contacts the wall 71 of the hollow square pile 7 during measurement.

[0051] The error prevention measurement unit 4 includes a laser position calibrator 41 and a reflection indicator 44 for ensuring the correct measurement position; the laser position calibrator 4 has a laser emitter 411 and a reflection receiver 412 on the same side of the fixed measuring claw 2 and the sliding measuring claw 3. When the sliding measuring claw 3 is moved to begin measuring the inner diameter of the hollow pile 7, the laser emitter 411 emits a visible laser beam that irradiates the inner hole of the hollow pile 7. When the laser beam passes completely through the inner hole of the hollow pile 7 without irradiating the inner wall of the hollow pile 7 and forming a reflection, the transmitter receiver 412 does not receive the reflected laser, and the reflection indicator light 44 is in an off state. At this time, it is considered that the measured diameter is perpendicular to the axis of the hollow pile 7, and its measurement error is small or considered to be no measurement error. When the fixed measuring claw 2 and the sliding measuring claw 3 have a large difference in height position on the inner wall of the hollow pile 7, the laser beam emitted by the laser emitter 411 will irradiate the inner wall of the hollow pile 7 and form reflected light. At this time, the reflection receiver 412 will receive the reflected light signal, and the reflection indicator light 44 will be in an illuminated state. The illuminated state of the reflection indicator light 44 can conveniently indicate measurement position errors, reminding the measuring personnel to adjust the height position of the fixed measuring claw 2 and the sliding measuring claw 3 until the reflection indicator light is off, thereby avoiding measurement errors and ensuring the consistency and accuracy of measurement data.

[0052] When measuring the inner diameter, the outer side of the measuring section 21 or 31 is pressed against the inner wall of the hollow pile 7. After the reflective indicator light goes out, the accurate value is read through the scale 13 on the ruler.

[0053] The above description only discloses preferred application examples of the present invention and should not be construed as limiting the scope of the present invention. Any simple equivalent changes and modifications made in accordance with the scope and description of this patent application shall fall within the scope of this patent.

Claims

1. A hollow pile error-proof measuring apparatus characterized by: The utility model relates to a kind of hollow square pile measuring device, including ruler, fixed measuring claw fixed to one end of ruler, sliding measuring claw with the sliding cooperation of the ruler and error-proof measuring unit fixed with the sliding measuring claw; Wherein, the front end of the sliding measuring claw and the fixed measuring claw has two sides straight measuring section, the outside of the measuring section is higher than its body outside line to ensure that the outside edge of the measuring section contacts hollow square pile hole wall when measuring; Wherein, the error-proof measuring unit includes laser position calibrator for ensuring that the measuring position is correct and reflective indicator light;The laser position calibrator has laser emitter and reflective receiver on the same side of the fixed measuring claw and the sliding measuring claw; Wherein, the error-proof measuring unit further includes displacement sensor for converting the displacement of the sliding measuring claw into data to display reading digitally, central controller for calculating and realizing various functions, electronic display screen for displaying data and interactive information, key for man-machine interaction and battery for providing power;The central controller is connected with the laser position calibrator, displacement sensor, electronic display screen, key and battery; When measuring outer diameter size, the inner measuring of the measuring section is tightened measured object, and the value is read out by the scale on the upper edge of the ruler; When measuring inner diameter size, the outside of the measuring section is closely attached to the inner wall of hollow pile, and accurate value is read out by the scale on the upper edge of the ruler after the reflective indicator light is extinguished.

2. A hollow pile error-proofing measuring apparatus as claimed in claim 1, characterized in that: The ruler has elongated hole in length direction, the sliding measuring claw has sliding screw penetrating the elongated hole, and the sliding damping between the sliding measuring claw and the ruler can be adjusted by the tightness of the sliding screw.

3. A hollow pile error-proof measuring apparatus as claimed in claim 1, characterized in that: The main body shape of the sliding measuring claw and the fixed measuring claw is right triangle, and the outside is right angle side, and the inside is oblique side.

4. A hollow pile error-proofing measuring apparatus as claimed in claim 1, characterized in that: The electronic display screen includes measurement data display area, function display area and measurement position correct identification.

5. A hollow pile error-proofing measuring apparatus as claimed in claim 1, characterized in that: The upper edge of the ruler also has scale, and the inner diameter value of the hollow square pile is read out by the position of the left side edge of the sliding measuring claw on the scale of the ruler.

6. A hollow pile error-proofing measuring apparatus as claimed in claim 1, characterized in that: The displacement sensor uses capacitive sensor.

7. A hollow pile error-proofing measuring apparatus as claimed in claim 1, characterized in that: The central controller uses microprocessor, and output data mode includes outer diameter measurement mode, inner diameter measurement mode, measurement position error-proof mode, measurement value accumulation mode, measurement value mean mode and measurement value square difference mode.

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