Wall surface distance measuring device
The device corrects for time delays in acoustic measurements to achieve precise wall distance calculations, enhancing measurement accuracy and simplifying the process while minimizing environmental and operational challenges.
Patent Information
- Application Number
- CN202421350035.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-13
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-06-13
AI Technical Summary
The traditional belt-type meter ruler measurement method is limited due to length, the belt-type meter ruler is difficult to store, the laser rangefinder is affected by the external environment, and the acoustic wave measurement ignores incident and exit time errors, resulting in inaccurate measurement of wall distance.
Using a wall distance measuring device including a sound wave transmitting component and a receiving component, the sound wave propagation time is measured by the correction receiving component and a plurality of sound wave receiving components, the sound wave sliding time is corrected, and the wall distance is calculated.
It improves the accuracy and convenience of wall distance measurement, reduces the impact of external environment, simplifies the measurement steps, and can estimate changes in wall properties and crack depth.
Smart Images
Figure CN223108074U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of wall distance measurement, and particularly relates to a wall distance measurement device. Background Technique
[0002] As an important structural part of the tobacco station, the wall plays an important role in maintaining the internal temperature of the tobacco station, preventing moisture leakage, and supporting the structure of the tobacco station. With the increase of the operation time of the tobacco station, cracks or damages appear in the walls of some tobacco stations, resulting in the infiltration of external moisture into the tobacco station, making the tobacco leaves damp and deteriorated, and the rapid loss of heat inside the tobacco station through the walls, resulting in poor drying effect of the tobacco leaves. Therefore, it is necessary to repair the damaged walls of the tobacco station.
[0003] In order to accurately prepare the wall repair materials and estimate the repair workload, it is necessary to measure the damaged distance of the wall. The measurement method of the traditional belt-type meter stick is limited by the length of the belt-type meter stick and requires multiple repeated measurements. In addition, the belt-type meter stick has problems such as difficult storage and curling, and is not convenient to use. In addition, the laser rangefinder will be affected by strong outdoor light or indoor dust particles, reducing the sensitivity of the laser transmitter and laser receiver, decreasing the ranging accuracy, and it cannot measure the wall distance of the common arc-shaped walls in the tobacco station.
[0004] Therefore, some manufacturers respectively set a sound wave transmitting component and a sound wave receiving component at both ends of the wall distance to be measured. The sound wave transmitting component transmits sound waves to the wall, the sound wave receiving component receives the waveform signal propagated in the wall, and the wall distance is estimated through the time difference between the sound wave transmitting component and the sound wave receiving component. However, during the measurement process, the time errors of the sound wave incident on the wall and the sound wave exiting from the wall to the sound wave receiving component are ignored, resulting in inaccurate wall distance measurement results. Moreover, when calculating the wall distance, it is necessary to estimate the sound wave propagation speed of the wall in advance, resulting in inaccurate wall distance measurement, or to sample the wall for wave speed measurement, which not only increases the complexity of the wall distance measurement, but also causes damage to the wall structure. Content of the Utility Model
[0005] The utility model provides a wall distance measurement device to solve the problems of inaccurate wall distance measurement results caused by ignoring the incident time and exit time errors of sound waves and the cumbersome measurement steps caused by the need to estimate the sound wave propagation speed of the wall.
[0006] The technical solution adopted by the utility model is as follows:
[0007] A wall distance measuring device, comprising a transmitting component and a receiving component. The transmitting component includes a sound wave emitter for emitting sound waves towards the wall and a calibration receiver. The calibration receiver can receive the sound waves propagating in the wall medium to obtain the first propagation time of the sound waves from the sound wave emitter to the calibration receiver.
[0008] The receiving component includes at least two sound wave receivers. The multiple sound wave receivers are arranged in a straight line and point towards the sound wave emitter. The sound wave receivers can receive the sound waves propagating in the wall medium to obtain the second propagation time of the sound waves from the sound wave emitter to each sound wave receiver and the sound wave sliding time between adjacent sound wave receivers. The first propagation time and the sound wave sliding time are used to correct the second propagation time to obtain the second sliding time, so as to calculate the wall distance from the sound wave emitter to the sound wave receiver through the sound wave sliding time, the center distance between adjacent sound wave receivers, and the second sliding time.
[0009] The wall distance measuring device of the present utility model further has the following additional technical features:
[0010] The spacing distance between adjacent sound wave receivers is equal to the spacing distance between the sound wave emitter and the calibration receiver.
[0011] The receiving component includes at least three sound wave receivers, and the multiple sound wave receivers are arranged at equal intervals in a straight line.
[0012] The receiving component is provided with a receiving groove opening towards the wall surface. The sound wave receivers are located in the receiving groove and can slide along the receiving groove in a direction perpendicular to the wall surface.
[0013] The sound wave receiver is provided with a limiting groove, and the side wall of the receiving groove is provided with a limiting rib located in the limiting groove. The limiting groove and the limiting rib cooperate to limit the sliding range of the sound wave receiver in the receiving groove.
[0014] An elastic member is arranged between the sound wave receiver and the side wall of the receiving groove, and the elastic member supports the sound wave receiver outward.
[0015] The sound wave receiver has an outer edge facing the opening direction of the receiving groove, and the outer edge is lower than the opening edge of the receiving groove, so as to form a protection space between the outer edge and the opening edge of the receiving groove. The protection space is used to fill the coupling agent.
[0016] The receiving component is provided with a hinge structure between adjacent sound wave receivers, so that adjacent sound wave receivers can rotate relatively.
[0017] The receiving assembly is provided with a laser positioning member, which emits laser along the arrangement direction of the plurality of acoustic wave receiving members and points to the acoustic wave transmitting member, so that the acoustic wave transmitting member and the plurality of acoustic wave receiving members are on the same straight line.
[0018] The wall distance measuring device further includes a communication assembly, and the communication assembly includes communication members respectively arranged on the transmitting assembly and the receiving assembly, which can receive an excitation signal for exciting the acoustic wave transmitting member and the waveform signals received by the calibration receiving member and the acoustic wave receiving members.
[0019] Due to the adoption of the above technical solution, the beneficial effects achieved by the present utility model are as follows:
[0020] 1. In the present utility model, the first propagation time measured by the calibration receiving member and the acoustic wave sliding time between adjacent acoustic wave receiving members are used to calculate the calibration time for the propagation of the acoustic wave from the acoustic wave transmitting member incident on the wall and refracted from the wall into the calibration receiving member or the acoustic wave receiving members. The second propagation time minus the calibration time is used to obtain the second sliding time of the acoustic wave sliding along the wall, and the calibration time corrects the second sliding time, improving the accuracy of the calculation of the wall distance between the acoustic wave transmitting member and the acoustic wave receiving member.
[0021] In addition, the center distance between adjacent acoustic wave receiving members is multiplied by the second sliding time and divided by the acoustic wave sliding time to calculate the wall distance between the acoustic wave transmitting member and the acoustic wave receiving member. The wall distance can be calculated only through the signals received by the calibration receiving member and the acoustic wave receiving members, without having to estimate the acoustic wave propagation speed of the wall material, improving the accuracy of the calculated wall distance. It is also not necessary to measure the acoustic wave propagation speed of the wall material, saving the wall distance measurement steps and improving the convenience of the wall distance measurement. The plurality of acoustic wave receiving members are arranged in a straight line and point to the acoustic wave transmitting member, so that the acoustic wave emitted by the acoustic wave transmitting member slides along the wall and is received by the acoustic wave receiving members in sequence. The acoustic wave sliding time corresponds to the distance between adjacent acoustic wave receiving members, facilitating data processing to calculate the wall distance.
[0022] The wall distance measuring device measures the wall distance through the acoustic wave propagating in the wall, reducing the influence of the external environment, and calculating the wall distance through the data measured in real time by the calibration receiving member and the acoustic wave receiving members, avoiding the interference of parameter changes such as light, temperature, and humidity on the measurement result. During measurement, the transmitting assembly and the receiving assembly are attached to the wall surface and respectively arranged at both ends of the wall distance to be measured, and the arrangement method is more convenient, improving the convenience of the wall distance measurement device for measurement.
[0023] 2. As a preferred embodiment of the present utility model, the receiving assembly includes at least three of the acoustic wave receivers, and the multiple acoustic wave receivers are arranged at equal intervals along a straight line. By using the slowness-time method to process at least three waveform data measured by the at least three acoustic wave receivers, the sliding wave velocity of the acoustic wave sliding on the wall is obtained. Multiplying the obtained sliding wave velocity by the second sliding time can obtain the measured wall distance. The at least three acoustic wave receivers increase the sampling points for data extraction, and the calculated sliding wave velocity is more consistent with the actual propagation velocity of the wall, reducing the error caused by the sudden change of the wall properties.
[0024] In addition, through the change situation between the multiple acoustic wave sliding times obtained by adjacent acoustic wave receivers, the change situation of the wall properties can be estimated. Generally, at positions where there are more voids in the wall and the material strength is weak, etc., the acoustic wave propagation velocity decreases and the acoustic wave sliding time increases. The depth of the wall crack can also be estimated through multiple acoustic wave sliding times to determine the distribution position and depth of the crack, so as to accurately repair the crack.
[0025] 3. As a preferred embodiment of the present utility model, an elastic member is provided between the acoustic wave receiver and the side wall of the receiving groove, and the elastic member supports the acoustic wave receiver outward. The elastic member supports the acoustic wave receiver outward, pushing the acoustic wave receiver against the wall tightly, increasing the signal strength received by the acoustic wave receiver, and improving the signal-to-noise ratio of the received signal. In addition, when the wall bulges at the measurement position and extends into the receiving groove, the wall bulge presses the acoustic wave receiver, and the acoustic wave receiver can drive the elastic member to produce extrusion deformation, so that the acoustic wave receiver slides into the receiving groove, reducing the extrusion force between the wall bulge and the acoustic wave receiver, and avoiding extrusion damage to the acoustic wave receiver. At the same time, the acoustic wave receiver and the wall bulge form a structural avoidance, so that the receiving assembly can fit on the wall, maintaining the multiple acoustic wave receivers in a working state and being able to receive and record signals.
[0026] 4. As a preferred embodiment of the present utility model, the acoustic wave receiver has an outer edge facing the opening direction of the accommodating groove, and the outer edge is lower than the opening edge of the accommodating groove, so as to form a protection space between the outer edge and the opening edge of the accommodating groove. The protection space is used to fill the coupling agent. Since the outer edge is lower than the opening edge of the accommodating groove, the acoustic wave receiver is completely accommodated in the accommodating groove, and the side wall of the accommodating groove forms a protective effect on the acoustic wave receiver, preventing the acoustic wave receiver from being damaged due to extrusion, collision, etc., and facilitating the storage of the wall distance measuring device. The protection space is used to fill the coupling agent, and the coupling agent fills the gap between the acoustic wave receiver and the wall surface, which can reduce the energy loss of the acoustic wave, improve the signal strength received by the acoustic wave receiver, so as to improve the signal-to-noise ratio of the acoustic wave receiver and reduce the difficulty of signal processing.
[0027] 5. As a preferred embodiment of the present utility model, the receiving assembly is provided with a hinge structure between adjacent acoustic wave receivers, so that adjacent acoustic wave receivers can rotate relative to each other. First of all, adjacent acoustic wave receivers can rotate relative to each other and approach, which can reduce the length of the receiving assembly and facilitate storage. Moreover, the side wall of the receiving assembly surrounds the outside of the receiver, which can form a supporting and shielding effect on the receiver, preventing the receiver from being squeezed and collided. In addition, when there are bulges or pits at the measurement point of the receiving assembly on the wall to be measured, or the wall is an arc-shaped wall, adjacent acoustic wave receivers can rotate relative to each other, so that the receiving assembly fits the wall surface, maintaining multiple acoustic wave receivers in a working state and enabling signal reception and recording. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] The drawings described herein are used to provide a further understanding of the present utility model and constitute a part of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation of the present utility model. In the drawings:
[0029] Figure 1 It is a cross-sectional view of the wall distance measuring device under an embodiment of the present utility model, where the wall distance measuring device is attached to the wall surface, and the arrow indicates the direction of acoustic wave propagation;
[0030] Figure 2 It is a cross-sectional view of the receiving assembly under an embodiment of the present utility model;
[0031] Figure 3 It is a side view of the receiving assembly under an embodiment of the present utility model.
[0032] Wherein:
[0033] 1 Transmitting assembly; 11 Acoustic wave transmitter; 12 Calibration receiver;
[0034] 2 Receiving assembly; 21 Acoustic wave receiver; 211 Limiting groove; 212 Piezoelectric ceramic sheet; 213 Epoxy resin wrapping layer; 22 Accommodating groove; 221 Limiting rib; 222 Elastic member; 223 Protection space; 23 Hinge structure; 24 Laser positioning member;
[0035] 3 Wall. Specific embodiments
[0036] In order to more clearly illustrate the overall concept of the present invention, the following will be described in detail by way of example with reference to the accompanying drawings of the specification.
[0037] In the following description, many specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention may be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited by the specific embodiments disclosed below.
[0038] In addition, in the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.
[0039] In the present invention, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a communication connection; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0040] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, descriptions with reference to terms such as "embodiment", "example", "an embodiment", "example" or "specific example" etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.
[0041] As Figure 1 shown, a wall distance measuring device includes a transmitting component 1 and a receiving component 2. The transmitting component 1 includes a sound wave transmitting member 11 for transmitting sound waves to a wall 3 and a calibration receiving member 12. The calibration receiving member 12 can receive the sound waves propagating in the wall medium to obtain the first propagation time of the sound waves from the sound wave transmitting member 11 to the calibration receiving member 12.
[0042] The receiving component 2 includes at least two sound wave receiving members 21. A plurality of the sound wave receiving members 21 are arranged in a straight line and point to the sound wave transmitting member 11. The sound wave receiving members 21 can receive the sound waves propagating in the wall medium to obtain the second propagation time of the sound waves from the sound wave transmitting member 11 to each of the sound wave receiving members 21 and the sound wave sliding time between adjacent sound wave receiving members 21. The first propagation time and the sound wave sliding time are used to correct the second propagation time to obtain a second sliding time, so as to calculate the wall distance from the sound wave transmitting member 11 to the sound wave receiving member 21 through the sound wave sliding time, the center distance between adjacent sound wave receiving members 21 and the second sliding time.
[0043] The wall distance measuring device can record the excitation waveform signal for exciting the sound wave transmitting member 11, the waveform signal received by the calibration receiving member 12, and the waveform signals received by the sound wave receiving members 21. The time difference between the starting point of the excitation waveform signal and the starting point of the waveform signal received by the calibration receiving member 12 is the first propagation time T1, the time difference between the starting point of the excitation waveform signal and the starting point of the waveform signal received by the sound wave receiving member 21 is the second propagation time T2, and the time difference between the starting points of the waveform signals received by adjacent sound wave receiving members 21 is the sound wave sliding time t.
[0044] It should be noted that piezoelectric ceramic sheets 212 are provided at one ends of the acoustic wave transmitter 11, the calibration receiver 12 and the acoustic wave receiver 21 facing the wall 3. The piezoelectric ceramic sheets 212 are wrapped with epoxy resin to form electrical isolation for the piezoelectric ceramic sheets 212. The propagation path of the acoustic wave energy from the acoustic wave transmitter 11 to the receiver is as follows: the piezoelectric ceramic sheet 212 is excited by an electrical signal to generate vibration to generate an acoustic wave signal. After the acoustic wave signal propagates through the epoxy resin coating layer 213 and the coupling agent, it enters the wall 3 at a critical incident angle to form a creeping wave that slides along the wall 3. At the receiver position, it propagates through the coupling agent and the epoxy resin coating layer 213, enters the piezoelectric ceramic sheet 212 and is converted into an electrical signal to be recorded.
[0045] In the present utility model, the first propagation time and the second propagation time are the incident time of the acoustic wave from the acoustic wave transmitter 11 to the wall 3, the creeping time along the wall 3, and the exit time of refracting from the wall 3 into the corresponding receiver. The acoustic wave creeping time and the second creeping time are the creeping times of the acoustic wave along the wall 3.
[0046] The first propagation time T1 measured by the calibration receiver 12 and the acoustic wave creeping time t between adjacent acoustic wave receivers 21 are used to calculate the calibration time Δt for the propagation of the acoustic wave from the acoustic wave transmitter 11 to the wall 3 and from the wall 3 refracting into the calibration receiver 12 or the acoustic wave receiver 21. The calculation method is where x is the distance between the centers of adjacent acoustic wave receivers 21, and X1 is the distance between the center of the acoustic wave transmitter 11 and the center of the calibration receiver 12.
[0047] Subtracting the calibration time from the second propagation time to obtain the second creeping time of the acoustic wave along the wall 3. The calibration time corrects the second creeping time, eliminates the error influence of the acoustic wave incident time and the exit time on the calculation of the wall surface distance, and improves the accuracy of the calculation of the wall surface distance between the acoustic wave transmitter 11 and the acoustic wave receiver 21.
[0048] In addition, the wall distance between the acoustic wave emitter 11 and the acoustic wave receiver 21 is calculated by multiplying the center distance between adjacent acoustic wave receivers 21 by the second sliding time and dividing by the acoustic wave sliding time. That is, the wall distance can be calculated based on the signals received by the calibration receiver 12 and the acoustic wave receiver 21, without having to estimate the acoustic wave propagation speed of the wall 3 material, improving the accuracy of the calculated wall distance. Also, there is no need to measure the acoustic wave propagation speed of the wall material, saving the steps of wall distance measurement and improving the convenience of wall distance measurement. The multiple acoustic wave receivers 21 are arranged in a straight line and point to the acoustic wave emitter 11, such that the acoustic waves emitted by the acoustic wave emitter 11 slide along the wall 3 and are sequentially received by the acoustic wave receivers 21. The acoustic wave sliding time corresponds to the distance between adjacent acoustic wave receivers 21, facilitating data processing for calculating the wall distance.
[0049] The wall distance measuring device measures the wall distance through acoustic waves propagating in the wall 3, reducing the influence of the external environment, and calculates the wall distance based on the data measured in real time by the calibration receiver 12 and the acoustic wave receiver 21, avoiding interference from changes in parameters such as light, temperature, and humidity on the measurement results. During measurement, the transmitting assembly 1 and the receiving assembly 2 are attached to the wall surface and respectively arranged at both ends of the wall distance to be measured, with a more convenient arrangement method, improving the convenience of measurement by the wall distance measuring device.
[0050] As a preferred embodiment of the present invention, as Figure 1 shown, the interval distance between adjacent acoustic wave receivers 21 is equal to the interval distance between the acoustic wave emitter 11 and the calibration receiver 12. When calculating the calibration time Δt, x = X1, and the calculation formula for the calibration time Δt is simplified to Δt = T1 - t. First, it can simplify the data processing steps, improve the data processing speed, and reduce the data processing pressure of the wall distance measuring device. Second, the data processing is not limited by the sizes of the transmitting assembly 1 and the receiving assembly 2, and can be adapted to various models of the wall distance measuring device. Also, when using the wall distance measuring device, there is no need for the user to set this interval distance, reducing the possibility of user operation errors and improving the convenience of user operation.
[0051] The present invention does not limit the implementation manner of data processing, and any one of the following embodiments can be adopted.
[0052] Embodiment 1: The data processing module is arranged in one of the transmitting component 1 and the receiving component 2, and the data recorded by the other of the transmitting component 1 and the receiving component 2 is transmitted to the data processing module through the communication component. The data processing module is generally a data processing chip, and the data processing program needs to be written into the chip in advance through a programming tool. It is not easy to modify after the data processing program is programmed. After the data processing chip processes the collected signals, it displays the calculated wall distance. This embodiment does not require external devices such as a computer, improving the usability of the wall distance measuring device. The interval distance between adjacent acoustic wave receivers 21 is equal to the interval distance between the acoustic wave transmitter 11 and the calibration receiver 12. The data processing program does not involve this interval distance parameter, which can reduce the programming error of the data processing program and improve the generality of the data processing program.
[0053] Embodiment 2: The data processing module is a computer. The waveform data recorded by the transmitting component 1 and the receiving component 2 is transmitted to the computer through the communication component for processing. During the process of the computer processing data, data processing is performed through processing software. To improve the generality of the processing software, the processing software usually includes a data input interface, and the user can input relevant data through the input interface to assist in the calculation. The data processing ability of the computer is more powerful, and it is more convenient for the user to change relevant parameters. More information about the wall 3 can be obtained by processing the recorded signal data, and it is more convenient to record the signal data and the processing results. The interval distance between adjacent acoustic wave receivers 21 is equal to the interval distance between the acoustic wave transmitter 11 and the calibration receiver 12. The initial value can be set through the input interface, reducing the input operation of the user and improving the convenience of the operation.
[0054] As Figure 2 and Figure 3 shown, the receiving component 2 includes at least three acoustic wave receivers 21, and the multiple acoustic wave receivers 21 are arranged at equal intervals along a straight line. At least three waveform data measured by the at least three acoustic wave receivers 21 are processed by using the slowness-time method to obtain the sliding wave velocity of the acoustic wave sliding on the wall 3. The calculation of the sliding wave velocity is more accurate, and the measured wall distance can be obtained by multiplying the obtained sliding wave velocity by the second sliding time. The receiving component 2 includes at least three acoustic wave receivers 21, increasing the sampling points for data extraction. The calculated sliding wave velocity is more consistent with the actual propagation velocity of the wall, reducing the error caused by the sudden change of the properties of the wall 3.
[0055] In addition, based on the variation among multiple acoustic wave transit times obtained by adjacent acoustic wave receivers 21, the variation of the wall properties can be estimated. Generally, at positions where there are more voids in the wall and the material strength is weak, the acoustic wave propagation speed decreases and the acoustic wave transit time increases. When repairing the wall 3, the parts with relatively increased acoustic wave transit times are repaired with emphasis to improve the accuracy of the repair. Meanwhile, the depth of the wall crack can also be estimated based on multiple acoustic wave transit times. The depth of the crack can be estimated through the relatively increased time of the acoustic wave transit and the estimated acoustic wave propagation speed of the wall 3. The wall structure health grade of the wall 3 can be classified according to the crack depth, so as to adopt different maintenance strategies.
[0056] As a preferred embodiment of the present utility model, as Figure 2 shown, the receiving assembly 2 is provided with a receiving groove 22 opening towards the wall surface. The acoustic wave receiver 21 is located in the receiving groove 22 and can slide along the receiving groove 22 in a direction perpendicular to the wall surface. The receiving assembly 2 fixes the acoustic wave receiver 21 through the receiving groove 22 to form an integral structure of the receiving assembly 2, realizing the control of parameters such as the spacing distance and position arrangement of the acoustic wave receiver 21, which is convenient for the use of the wall distance measuring device. In addition, the side wall of the receiving groove 22 protects the acoustic wave receiver 21, preventing devices such as the piezoelectric ceramic sheet 212 of the acoustic wave receiver 21 from being damaged due to pressure. The receiving groove 22 opens towards the wall surface, and the acoustic wave propagating along the wall 3 can be directly transmitted to the acoustic wave receiver 21 through the coupling agent, reducing the structural interval and gap interval between the acoustic wave receiver 21 and the wall 3, improving the signal strength received by the acoustic wave receiver 21, and thus increasing the wall distance measurement range measured by the wall distance measuring device.
[0057] On this basis, the acoustic wave receiver 21 can slide along the receiving groove 22 in a direction perpendicular to the wall surface. When the wall bulges at the measurement position and extends into the receiving groove 22, the wall bulge squeezes the acoustic wave receiver 21, and the acoustic wave receiver 21 slides into the receiving groove 22, reducing the squeezing force between the wall bulge and the acoustic wave receiver 21 and preventing the acoustic wave receiver 21 from being damaged by extrusion. At the same time, the acoustic wave receiver 21 forms a structural avoidance with the wall bulge, enabling the receiving assembly 2 to fit onto the wall surface and maintaining multiple acoustic wave receivers 21 in a working state for signal reception and recording. When there is a pit at the measurement position of the wall, it is necessary to fill the pit with coupling agent in advance to reduce the spatial gap between the acoustic wave receiver 21 and the wall 3 and reduce the energy loss of the acoustic wave energy propagated by the wall 3 transmitted to the acoustic wave receiver 21.
[0058] As an embodiment under this embodiment mode, asFigure 2 As shown, the acoustic wave receiver 21 is provided with a limiting groove 211, and a limiting rib 221 located within the limiting groove 211 is provided on the side wall of the accommodating groove 22. The limiting groove 211 and the limiting rib 221 cooperate to limit the sliding range of the acoustic wave receiver 21 within the accommodating groove 22. The cooperation between the limiting groove 211 and the limiting rib 221 can limit the position of the acoustic wave receiver 21 within the accommodating groove 22, preventing the acoustic wave receiver 21 from disengaging from the accommodating groove 22, which would otherwise result in repeated operations of reinstallation. It can also reduce the pulling force on the connection lines within the acoustic wave receiver 21, avoiding the problem of the connection lines having breakpoints and causing the acoustic wave receiver 21 to malfunction. The cooperation between the limiting groove 211 and the limiting rib 221 guides the moving direction of the acoustic wave receiver 21, preventing relative displacement of separation or approach between adjacent acoustic wave receivers 21, thereby avoiding errors in the spacing distance between adjacent acoustic wave receivers 21. At the same time, it can also prevent the problem that the acoustic wave receiver 21 has a positional offset within the accommodating groove 22, resulting in structural interference between the acoustic wave receiver 21 and the side wall of the accommodating groove 22 and making it difficult for the acoustic wave receiver 21 to move within the accommodating groove 22. Of course, if the limiting rib 221 is provided on the acoustic wave receiver 21 and the limiting groove 211 is provided on the side wall of the accommodating groove 22, the cooperation between the limiting rib 221 and the limiting groove 211 can also achieve the function of limiting the sliding range of the acoustic wave receiver 21 within the accommodating groove 22.
[0059] Preferably, as Figure 2 shown, an elastic member 222 is provided between the side wall of the acoustic wave receiver 21 and the accommodating groove 22, and the elastic member 222 supports the acoustic wave receiver 21 outwardly. The elastic member 222 supports the acoustic wave receiver 21 outwardly, pushing the acoustic wave receiver 21 against the wall surface, increasing the signal strength received by the acoustic wave receiver 21, and improving the signal-to-noise ratio of the received signal. Additionally, when the wall surface protrudes at the measurement position and extends into the accommodating groove 22, the protruding wall surface squeezes the acoustic wave receiver 21, and the acoustic wave receiver 21 can drive the elastic member 222 to undergo compressive deformation, causing the acoustic wave receiver 21 to slide into the accommodating groove 22, reducing the squeezing force between the protruding wall surface and the acoustic wave receiver 21, and preventing the acoustic wave receiver 21 from being damaged by squeezing.
[0060] As another embodiment of the present utility model, as Figure 2 As shown, the acoustic wave receiver 21 has an outer edge facing the opening direction of the receiving groove 22, and the outer edge is lower than the opening edge of the receiving groove 22, so as to form a protection space 223 between the outer edge and the opening edge of the receiving groove 22. The protection space 223 is used to fill the coupling agent. Since the outer edge is lower than the opening edge of the receiving groove 22, the acoustic wave receiver 21 is completely accommodated in the receiving groove 22. The side wall of the receiving groove 22 forms a protective effect on the acoustic wave receiver 21, preventing the acoustic wave receiver 21 from being damaged due to extrusion, collision, etc., and facilitating the storage of the wall distance measuring device. A protection space 223 is formed between the outer edge and the opening edge of the receiving groove 22, which is convenient for filling the coupling agent. The coupling agent fills the gap between the acoustic wave receiver 21 and the wall, which can reduce the energy loss of the acoustic wave, improve the signal strength received by the acoustic wave receiver 21, so as to improve the signal-to-noise ratio of the acoustic wave receiver 21 and reduce the difficulty of signal processing. Preferably, the coupling agent fills the protection space 223, and the outer edge of the filled coupling agent protrudes outward relative to the edge of the receiving groove 22, so as to facilitate squeezing the coupling agent onto the wall. The coupling agent is vaseline.
[0061] It should be noted that in the present invention, similar to the receiving component 2, the transmitting component 1 is also provided with structures such as the receiving groove 22 for installing and fixing the acoustic wave transmitter 11 and the calibration receiver 12.
[0062] As Figure 2 and Figure 3 shown, the receiving component 2 is provided with a hinge structure 23 between adjacent acoustic wave receivers 21, so that adjacent acoustic wave receivers 21 can rotate relative to each other. First of all, adjacent acoustic wave receivers 21 can rotate relative to each other and approach, which can reduce the length of the receiving component 2 and facilitate storage. Moreover, the side wall of the receiving component 2 surrounds the outside of the receiver, which can form a supporting and shielding effect on the receiver, preventing the receiver from being squeezed and collided. In addition, when there are bulges or pits at the measurement point of the wall to be measured on the receiving component 2, or the wall 3 is an arc-shaped wall, adjacent acoustic wave receivers 21 can rotate relative to each other, so that the receiving component 2 fits the wall surface, maintaining multiple acoustic wave receivers 21 in a working state and enabling signal reception and recording.
[0063] As a preferred embodiment of the present invention, as Figure 2As shown, the receiving assembly 2 is provided with a laser positioning member 24 which emits laser along the arrangement direction of the plurality of acoustic wave receiving members 21 and points to the acoustic wave transmitting member 11. When positioning, the transmitting assembly 1 is attached to one end of the wall surface with the distance to be measured, and the receiving assembly 2 is placed at the other end of the wall surface. At this time, the receiving assembly 2 is attached to the other end of the wall surface or is moved outward perpendicular to the wall surface by a certain distance. Rotate the acoustic wave receiving member 21 within the wall plane so that the laser passes through the acoustic wave transmitting member 11, so that the plurality of acoustic wave receiving members 21 and the acoustic wave transmitting member 11 are on the same straight line, so that the acoustic wave sliding time corresponds to the interval distance between adjacent acoustic wave receiving members 21. At this time, turn off the laser positioning member 24, and move the receiving assembly 2 perpendicular to the wall surface to attach it to the wall surface. The laser positioning member 24 is arranged on the receiving assembly 2, and the acoustic wave transmitting member 11 is arranged on the transmitting assembly 1, so that the transmitting assembly 1 and the receiving assembly 2 consume power with similar power consumption, and the batteries of the transmitting assembly 1 and the receiving assembly 2 can be replaced or charged simultaneously.
[0064] In addition, the present invention does not limit the arrangement direction of the acoustic wave transmitting member 11 and the calibration receiving member 12. The laser positioning member 24 is arranged on the receiving assembly 2. When positioning the transmitting assembly 1 and the receiving assembly 2, only the receiving assembly 2 needs to be rotated so that the laser passes through the acoustic wave transmitting member 11, and the transmitting assembly 1 does not need to be rotated, which increases the convenience of positioning.
[0065] As a preferred embodiment of the present invention, the wall distance measuring device further includes a communication assembly. The communication assembly includes communication members respectively arranged on the transmitting assembly 1 and the receiving assembly 2, which can receive the excitation signal for exciting the acoustic wave transmitting member 11 and the waveform signals received by the calibration receiving member 12 and the acoustic wave receiving members 21. First, the communication assembly controls the wall distance measuring device to start recording the excitation signal and the waveform signal simultaneously, so that the zero points of the excitation signal and the waveform signal are at the same moment, which is convenient for calculating times such as the first propagation time, the second propagation time, and the acoustic wave sliding time. In addition, the communication assembly transmits the excitation signal and the waveform signal to the data processing module for data processing and calculation of the wall distance.
[0066] Preferably, the communication member is a short-range wireless communication device, and short-range communication technologies such as Bluetooth, wireless local area network, infrared data transmission, and GPS can be adopted. The communication distance can reach dozens of meters or even hundreds of meters, and the cost is low and the power consumption is low.
[0067] In the present invention, the parts not described can be realized by adopting or referring to the existing technologies.
[0068] Each embodiment in this specification is described in a progressive manner. For the same or similar parts among the embodiments, reference can be made to each other, and the key point of each embodiment is to illustrate the differences from other embodiments.
[0069] The above are only the embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, various modifications and changes can be made to the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the scope of the claims of the present utility model.
Claims
1. A wall distance measuring device, comprising a transmitting component and a receiving component, characterized in that the transmitting component includes a sound wave emitter for emitting sound waves towards the wall and a calibration receiver, and the calibration receiver can receive the sound waves propagating in the wall medium to obtain a first propagation time of the sound waves from the sound wave emitter to the calibration receiver. The receiving component includes at least two sound wave receivers, and a plurality of the sound wave receivers are arranged in a straight line and point to the sound wave emitter. The sound wave receivers can receive the sound waves propagating in the wall medium to obtain a second propagation time of the sound waves from the sound wave emitter to each of the sound wave receivers and a sound wave sliding time between adjacent sound wave receivers. The first propagation time and the sound wave sliding time are used to correct the second propagation time to obtain a second sliding time, so as to calculate the wall distance from the sound wave emitter to the sound wave receiver through the sound wave sliding time, the center distance between adjacent sound wave receivers, and the second sliding time.
2. The wall distance measuring device according to claim 1, characterized in that the spacing distance between adjacent sound wave receivers is equal to the spacing distance between the sound wave emitter and the calibration receiver.
3. The wall distance measuring device according to claim 1, characterized in that the receiving component includes at least three sound wave receivers, and a plurality of the sound wave receivers are arranged at equal intervals in a straight line.
4. The wall distance measuring device according to claim 1, characterized in that the receiving component is provided with a receiving groove opening towards the wall, and the sound wave receivers are located in the receiving groove and can slide along the receiving groove in a direction perpendicular to the wall.
5. The wall distance measuring device according to claim 4, characterized in that the sound wave receivers are provided with limiting grooves, and the side walls of the receiving groove are provided with limiting ribs located in the limiting grooves. The limiting grooves and the limiting ribs cooperate to limit the sliding range of the sound wave receivers in the receiving groove.
6. The wall distance measuring device according to claim 5, characterized in that an elastic member is provided between the sound wave receivers and the side walls of the receiving groove, and the elastic member supports the sound wave receivers outward.
7. The wall distance measuring device according to claim 4, characterized in that the sound wave receivers have outer edges facing the opening direction of the receiving groove, and the outer edges are lower than the opening edges of the receiving groove, so as to form a protection space between the outer edges and the opening edges of the receiving groove, and the protection space is used to fill the coupling agent.
8. The wall distance measuring device according to claim 1, characterized in that the receiving component is provided with a hinge structure between adjacent sound wave receivers, so that adjacent sound wave receivers can rotate relatively.
9. The wall distance measuring device according to claim 1, characterized in that The receiving component is provided with a laser positioning member, and the laser positioning member emits laser along the arrangement direction of the plurality of acoustic wave receiving members and points to the acoustic wave transmitting member, so that the acoustic wave transmitting member and the plurality of acoustic wave receiving members are on the same straight line.
10. The wall distance measuring device according to claim 1, characterized in that the wall distance measuring device further includes a communication component, and the communication component includes communication members respectively arranged on the transmitting component and the receiving component, and is capable of receiving an excitation signal for exciting the acoustic wave transmitting member and waveform signals received by the calibration receiving member and the acoustic wave receiving member.