A floor tile hollowing detection device and method

Abstract

The invention relates to the technical field of hollow drum detection, and discloses a floor tile hollow drum detection device and method, comprising a detection frame, an excitation component, and a hollow drum detector, wherein the excitation component and the hollow drum detector are fixedly arranged on the detection frame, and the hollow drum detector comprises a sensor unit, a signal collection unit, a signal processing unit, and an analysis and judgment unit. The device can automatically trigger detection, analyze signals, and mark hollow drum positions, thereby greatly reducing manual operations, improving detection efficiency and work quality, and automatically marking hollow drum positions, so that maintenance personnel can quickly locate problem areas, carry out maintenance in a targeted manner, and improve the efficiency and quality of maintenance work. Based on scientific signal processing and judgment methods, the uncertainty of relying on personal experience in traditional detection methods is avoided, and the detection results are made more scientific and credible.

Description

Technical Field

[0001] The invention relates to the technical field of hollowing detection, and in particular to a floor tile hollowing detection device and method. Background Art

[0002] In the field of building decoration, the laying quality of floor tiles is of vital importance. Floor tile hollowing is a common quality problem, which not only affects the appearance, but may also cause floor tiles to crack and warp, shorten the service life of floor tiles, and even affect walking safety.

[0003] The traditional method of detecting hollow tiles mainly relies on manually knocking on the tiles to judge whether they are hollow by the sound. However, this method relies heavily on the experience of the inspectors, and its accuracy and reliability are difficult to guarantee, which is prone to misjudgment. In addition, manual inspection is inefficient and time-consuming and labor-intensive for large-scale tile laying projects.

[0004] With the development of technology, some detection equipment using acoustic or vibration principles have emerged, but these devices often have problems such as single function, low detection accuracy, and complex operation. Some equipment cannot accurately distinguish the degree of hollowing, and some cannot automatically mark the location of hollowing, which brings inconvenience to subsequent maintenance and rectification work.

[0005] Therefore, in order to improve the accuracy, efficiency and automation of floor tile hollowing detection, the development of a new type of floor tile hollowing detection device has become an urgent need in the industry. Summary of the invention

[0006] The purpose of the present invention is to provide a floor tile hollowing detection device and method, which solves the technical problems raised in the background technology.

[0007] The purpose of the present invention can be achieved through the following technical solutions:

[0008] A floor tile hollowing detection device and method, comprising a detection frame, an excitation component, and a hollowing detector, wherein the excitation component and the hollowing detector are both fixedly arranged on the detection frame;

[0009] The excitation component is used to strike the floor tiles to generate vibration and sound;

[0010] The hollow drum detector comprises:

[0011] The sensor unit includes a sound sensor and a vibration sensor, which are used to collect sound signals and vibration signals respectively;

[0012] The signal collection unit collects the sound signal and the vibration signal collected by the sensor unit in a discrete manner and obtains a corresponding sound signal sequence and a vibration signal sequence;

[0013] A signal processing unit is used to calculate the judgment value based on the discretized sound signal and vibration signal, and obtain the judgment value of the corresponding floor tile knocking position;

[0014] A sampling trigger unit is used to generate a sampling signal at a plurality of floor tiles which are known to have no hollows, and trigger the activation of the excitation component and the sensor unit;

[0015] A detection trigger unit is used to generate a detection signal at all the floor tiles to be detected, and trigger the activation of the excitation component and the sensor unit;

[0016] The analysis and judgment unit is used to obtain a sound signal and a vibration signal from the sampling signal and the detection signal respectively, and process them through the signal collection unit and the signal processing unit respectively, and obtain corresponding judgment values, and then compare and analyze the judgment values ​​obtained from the sampling signal and the detection signal respectively to determine whether the floor tiles are hollow.

[0017] As a further solution of the present invention: it also includes an electric push rod and a hollow drum identification stamp;

[0018] The electric push rod is fixedly arranged on the detection frame, the hollow drum identification stamp is fixedly arranged on the output end of the electric push rod, and the output end of the electric push rod is arranged perpendicular to the ground.

[0019] As a further solution of the present invention: the hollow drum detector further includes:

[0020] The hollow drum marking unit is electrically connected to the electric push rod and is used to add a hollow drum mark at a designated position of the corresponding floor tile when the hollow drum signal is generated;

[0021] Specifically: after the hollow drum marking unit receives the hollow drum signal, it triggers the extending end of the electric push rod to extend, thereby driving the hollow drum marking stamp to approach the ground. The hollow drum marking stamp is then stamped on the designated position of the floor tile, and the corresponding hollow drum mark is obtained.

[0022] As a further solution of the present invention: wherein, the hollow drum identification stamp is an ink-returning stamp.

[0023] As a further solution of the present invention: the discretization collection method is as follows:

[0024] Set the sampling frequency to fs;

[0025] According to the sampling frequency fs, a sound signal sequence S = [s1, s2, ... sn] is obtained, where si represents the sound intensity value of the i-th sampling point, i = 1, 2, ... n, and n represents the number of sampling points corresponding to the sound signal sequence;

[0026] According to the sampling frequency fs, the vibration signal sequence V=[v1, v2, ... vm] is obtained, where vj represents the vibration intensity value of the jth sampling point, j=1, 2, ... m, and m represents the number of corresponding sampling points in the vibration signal sequence.

[0027] As a further solution of the present invention: wherein, during the process of collecting sound signals and vibration signals, the corresponding intensity value represents the amplitude or intensity of the sound or vibration at a certain sampling point.

[0028] As a further solution of the present invention: the determination value is calculated as follows:

[0029] Step 1, extract the sound signal sequence S = [s1, s2, ... sn] and the vibration signal sequence V = [v1, v2, ... vm];

[0030] Step 2, calculate the average values ​​of all si and all vj respectively, and mark them as Ps and Pv respectively;

[0031] Step 3, calculate the standard deviation of all si and all vj respectively through the standard deviation formula, and mark them as Bs and Bv;

[0032] Step 4, calculate the peak values ​​of all si and all vj respectively, and mark them as Fs and Fv;

[0033] Step 5, through a specific formula: and Calculate the corresponding energy values ​​Es and Ev in all si and all vj respectively;

[0034] Step 6, substitute the results obtained from Step 2 to Step 5 into the predetermined judgment value calculation formula D = (Ps + Pv) × β1 + (Bs + Bv) × β2 + (Fs + Fv) × β3 + (Es + Ev) × β4, and obtain the judgment value D of the corresponding knocking position;

[0035] Wherein, β1, β2, β3, and β4 are the corresponding preset weight coefficients respectively.

[0036] As a further solution of the present invention: the sampling signal is used to trigger the excitation component to strike the floor tiles to generate vibration and sound, and at the same time, the sound signal and the vibration signal are respectively collected by triggering the sensor unit;

[0037] The detection signal is used to trigger the excitation component to knock on the floor tiles to generate vibration and sound, and at the same time, the sound signal and the vibration signal are collected respectively by triggering the sensor unit.

[0038] As a further solution of the present invention: the specific method of the analysis and determination unit is as follows:

[0039] SS1. Obtain multiple decision values ​​corresponding to the sampled signal and mark them as Dt, where t=1, 2, ..., e, and e represents the number of decision values ​​corresponding to the sampled signal:

[0040] SS2. Calculate the discrete value X of all the judgment values ​​corresponding to the sampled signal through the variance calculation formula;

[0041] SS3, then compare the discrete value X with its corresponding preset discrete threshold value Xy:

[0042] When X≤Xy, directly select a Dt with the maximum and minimum value from all Dt, and mark them as Dmax and Dmin respectively, and then form the standard judgment value interval [Dmin, Dmax];

[0043] When X>Xy, the corresponding Dt is deleted in descending order according to |Dt-Dp| and the remaining discrete values ​​X are calculated accordingly until X≤Xy; where Dp represents the average value of all Dt used in calculating the corresponding discrete value;

[0044] Next, when X≤Xy, all Dt involved in the calculation of the corresponding discrete value X are obtained, and a Dt with the largest value and the smallest value is selected from all Dt, and they are marked as Dmax and Dmin respectively, and then they are combined into a standard judgment value interval [Dmin, Dmax];

[0045] SS4. Extract the judgment value corresponding to the detection signal and mark it as D0. Then match the judgment value D0 with the standard judgment value interval [Dmin, Dmax]:

[0046] If Dmin≤D0≤Dmax, it means that there is no hollow at the designated position of the corresponding floor tile when the detection signal is generated;

[0047] If any one of D0>Dmax and D0<Dmin is established, it means that there is a hollow at the designated position of the corresponding floor tile when the detection signal is generated, and a hollow signal is generated accordingly.

[0048] A floor tile hollowing detection method is implemented by the above-mentioned floor tile hollowing detection device.

[0049] Beneficial effects of the present invention:

[0050] Improve detection accuracy: By collecting signals through sound sensors and vibration sensors and undergoing a series of precise calculations and analyses, it is possible to more accurately determine whether the floor tiles are hollow and reduce the possibility of misjudgment.

[0051] Realize automatic detection and marking: The device can automatically trigger detection, analyze signals and mark the hollow drum position, which greatly reduces manual operation and improves detection efficiency and work quality.

[0052] Standardized testing process: Clear sampling frequency and signal processing steps are set to make the test results consistent and comparable, providing a reliable basis for floor tile laying quality assessment.

[0053] Improve detection efficiency: It can process sound and vibration signals at the same time, quickly obtain judgment values ​​and conduct comparative analysis, and can detect a large number of floor tiles in a short time, saving time and labor costs.

[0054] Convenient for subsequent maintenance: Automatically mark the location of the hollow drum, so that maintenance personnel can quickly locate the problem area and carry out targeted maintenance, improving the efficiency and quality of maintenance work.

[0055] Improve the scientific nature of detection: Based on scientific signal processing and judgment methods, it avoids the uncertainty of relying on personal experience in traditional detection methods, making the detection results more scientific and credible.

[0056] Wide scope of application: The detection principle and method of the device are universal and suitable for hollowing detection of floor tiles of various types and specifications, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] The present invention will be further described below in conjunction with the accompanying drawings.

[0058] Figure 1 The present invention is a system block diagram of a floor tile hollowing detection device and method.

[0059] Figure 2 The present invention is a schematic diagram of the method flow of a floor tile hollowing detection device and method. DETAILED DESCRIPTION

[0060] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0061] Embodiment 1

[0062] See also Figure 1 As shown, the present invention provides a floor tile hollowing detection device, including a detection frame, an excitation component, and a hollowing detector;

[0063] The excitation component and the hollow drum detector are both fixedly arranged on the detection frame;

[0064] The excitation component is used to strike the floor tiles to generate vibration and sound;

[0065] In this embodiment, the excitation component can be composed of a striking member, a driving member, and a transmission member; its position is fixed at the bottom of the detection frame so that it can conveniently strike the floor tiles vertically to generate vibration and sound;

[0066] Among them, the striking member is such as a hammer head, the driving member is such as a motor or a pneumatic device, and the transmission member is such as a connecting rod;

[0067] The hollow drum detector includes:

[0068] The sensor unit includes a sound sensor and a vibration sensor, which are used to collect sound signals and vibration signals respectively;

[0069] A signal collection unit, which discretizes and collects the sound signal and vibration signal collected by the sensor unit;

[0070] The specific method is as follows:

[0071] Set the sampling frequency to fs;

[0072] In this embodiment, the sampling frequency refers to the number of samples collected per second when a continuous sound signal is digitally sampled; in sound processing, since the sound signal is a continuously changing analog signal, in order to be processed in a digital manner, the sound signal needs to be measured and recorded at a certain time interval, and the reciprocal of this time interval is the sampling frequency;

[0073] According to the sampling frequency fs, a sound signal sequence S = [s1, s2, ... sn] is obtained, where si represents the sound intensity value of the i-th sampling point, i = 1, 2, ... n, and n represents the number of sampling points corresponding to the sound signal sequence;

[0074] According to the sampling frequency fs, a vibration signal sequence V = [v1, v2, ... vm] is obtained, where vj represents the vibration intensity value of the jth sampling point, j = 1, 2, ... m, and m represents the number of sampling points corresponding to the vibration signal sequence;

[0075] Among them, in the process of collecting sound signals and vibration signals, the corresponding intensity value represents the amplitude or intensity of the sound or vibration at a certain sampling point;

[0076] A signal processing unit, used for calculating a judgment value based on the discretized sound signal and vibration signal collected;

[0077] The specific method is as follows:

[0078] Step 1, extract the sound signal sequence S = [s1, s2, ... sn] and the vibration signal sequence V = [v1, v2, ... vm];

[0079] Step 2, calculate the average values ​​of all si and all vj respectively, and mark them as Ps and Pv respectively;

[0080] In this embodiment, the signal processing unit is preset with a corresponding average value formula: and

[0081] Step 3, calculate the standard deviation of all si and all vj respectively through the standard deviation formula, and mark them as Bs and Bv;

[0082] In this embodiment, the signal processing unit is preset with a corresponding standard deviation formula: and

[0083] Step 4, calculate the peak values ​​of all si and all vj respectively, and mark them as Fs and Fv;

[0084] In this embodiment, the signal processing unit is preset with a corresponding peak value formula: and

[0085] Step 5, through a specific formula: and Calculate the corresponding energy values ​​Es and Ev in all si and all vj respectively;

[0086] Step 6, substituting the results obtained from Step 2 to Step 5 into the predetermined determination value calculation formula, and obtaining the determination value D of the corresponding knocking position;

[0087] In this embodiment, the determination value calculation formula is:

[0088] D=(Ps+Pv)×β1+(Bs+Bv)×β2+(Fs+Fv)×β3+(Es+Ev)×β4;

[0089] In the formula, β1, β2, β3, and β4 are the corresponding preset weight coefficients respectively;

[0090] A sampling trigger unit is used to generate sampling signals at a plurality of floor tiles which are known to have no hollows;

[0091] The sampling signal is used to trigger the excitation component to knock the floor tiles to generate vibration and sound, and at the same time, the sound signal and the vibration signal are collected respectively by the trigger sensor unit;

[0092] A detection trigger unit, used for generating a detection signal at all the floor tiles to be detected;

[0093] The detection signal is used to trigger the excitation component to knock the floor tiles to generate vibration and sound, and at the same time, the sound signal and the vibration signal are collected respectively by the trigger sensor unit;

[0094] The analysis and determination unit is used to obtain the sound signal and the vibration signal from the sampling signal and the detection signal respectively, and process them through the signal collection unit and the signal processing unit respectively, and obtain the corresponding determination value, and then compare and analyze the determination values ​​obtained from the sampling signal and the detection signal respectively, to determine whether the floor tile is hollow;

[0095] The specific method is as follows:

[0096] SS1. Obtain multiple decision values ​​corresponding to the sampled signal and mark them as Dt, where t=1, 2, ..., e, and e represents the number of decision values ​​corresponding to the sampled signal:

[0097] SS2. Calculate the discrete value X of all the judgment values ​​corresponding to the sampled signal through the variance calculation formula;

[0098] SS3, then compare the discrete value X with its corresponding preset discrete threshold value Xy:

[0099] When X≤Xy, directly select a Dt with the maximum and minimum value from all Dt, and mark them as Dmax and Dmin respectively, and then form the standard judgment value interval [Dmin, Dmax];

[0100] When X>Xy, the corresponding Dt is deleted in descending order according to |Dt-Dp| and the remaining discrete values ​​X are calculated accordingly until X≤Xy; where Dp represents the average value of all Dt used in calculating the corresponding discrete value;

[0101] Next, when X≤Xy, all Dt involved in the calculation of the corresponding discrete value X are obtained, and a Dt with the largest value and the smallest value is selected from all Dt, and they are marked as Dmax and Dmin respectively, and then they are combined into a standard judgment value interval [Dmin, Dmax];

[0102] SS4. Extract the judgment value corresponding to the detection signal and mark it as D0. Then match the judgment value D0 with the standard judgment value interval [Dmin, Dmax]:

[0103] If Dmin≤D0≤Dmax, it means that there is no hollow at the designated position of the corresponding floor tile when the detection signal is generated;

[0104] If any of D0>Dmax and D0<Dmin is true, it means that there is a hollow drum at the designated position of the corresponding floor tile when the detection signal is generated, and a hollow drum signal is generated accordingly;

[0105] This embodiment generates vibration and sound through the excitation component, and combines the sensor unit, the signal collection unit and the signal processing unit to realize the quantitative judgment of the hollowness of floor tiles; the sound and vibration signals are digitally collected by the sampling frequency, so as to obtain accurate signal data, providing a reliable basis for subsequent analysis and processing; the calculation method of the average value, standard deviation, peak value and energy value of the sound and vibration signals, as well as the calculation formula of the judgment value are defined in detail, so that the detection result is scientific and accurate; through the sampling trigger unit and the detection trigger unit, signal collection is carried out at the floor tiles known to be free of hollowness and the floor tiles to be detected, respectively, to ensure the comprehensiveness and comparability of the data; the analysis and judgment unit adopts a rigorous comparison analysis method, which can accurately judge whether the floor tiles are hollow, improves the reliability of detection, and provides strong support for building quality detection.

[0106] Embodiment 2

[0107] As the second embodiment of the present invention, when the present application is implemented, compared with the first embodiment, the technical solution of the present embodiment is different from that of the first embodiment only in that the present embodiment further includes: an electric push rod and a hollow drum identification stamp;

[0108] Among them, the hollow drum identification seal is made by using the ink-returning seal technology in the existing technology;

[0109] The electric push rod is fixedly arranged on the detection frame, the hollow drum identification stamp is fixedly arranged on the output end of the electric push rod, and the output end of the electric push rod is arranged perpendicular to the ground;

[0110] The hollow drum detector also includes:

[0111] The hollow drum marking unit is electrically connected to the electric push rod and is used to add a hollow drum mark at a designated position of the corresponding floor tile when the hollow drum signal is generated;

[0112] Specifically: after the hollow drum marking unit receives the hollow drum signal, it triggers the extending end of the electric push rod to extend, thereby driving the hollow drum marking stamp to approach the ground. The hollow drum marking stamp is then stamped on the designated position of the floor tile, and the corresponding hollow drum mark is obtained.

[0113] Based on the first embodiment, the present embodiment adds an electric push rod and a hollow tile identification stamp, which can automatically mark when hollow tiles are detected, thereby improving the efficiency and convenience of the detection work; the hollow tile identification stamp made by the ink-returning stamp technology has a clear and lasting marking effect, which is convenient for subsequent maintenance and processing; the hollow tile marking unit is electrically connected to the electric push rod, realizing the automated process of hollow tile detection and marking, reducing manual operation and human errors; hollow tiles can be marked in a timely and accurate manner, facilitating construction personnel to quickly locate and deal with problems, and improving the pertinence and timeliness of maintenance work; the overall system has a higher degree of automation, which further improves the efficiency and accuracy of hollow tile detection and marking, and helps to ensure the quality and safety of construction projects.

[0114] Embodiment 3

[0115] As the third embodiment of the present invention, when the present application is specifically implemented, compared with the first and second embodiments, the technical solution of this embodiment is to combine the solutions of the first and second embodiments mentioned above for implementation.

[0116] See also Figure 2 As shown, the present invention also provides a floor tile hollowing detection method, which is implemented by the above-mentioned floor tile hollowing detection device, and the method comprises the following steps:

[0117] Step 1: Preparation of the testing device

[0118] Prepare a testing frame, and fix the excitation component and the hollow drum detector on the testing frame;

[0119] Step 2: Stimulate component tapping operation

[0120] Using an excitation component to strike the floor tiles to generate vibration and sound;

[0121] Step 3: Sound and vibration signal collection

[0122] The sound signal and the vibration signal are respectively collected by the sensor unit in the hollow drum detector;

[0123] Step 4: Discrete signal collection

[0124] Use a signal collection unit to discretize the collected sound signals and vibration signals;

[0125] Step 5: Calculation of judgment value

[0126] The signal processing unit is used to calculate the judgment value based on the discretized sound signal and vibration signal, and obtain the judgment value D of the corresponding knocking position.

[0127] Step 6: Sample signal generation and processing

[0128] A sampling trigger unit is used to generate sampling signals at multiple floor tiles that are known to have no hollows. The sampling signals are used to trigger the excitation component to strike the floor tiles to generate vibration and sound, and at the same time trigger the sensor unit to collect sound signals and vibration signals respectively.

[0129] Step 7: Detection signal generation and processing

[0130] The detection trigger unit is used to generate a detection signal at all the floor tiles to be detected. The detection signal is used to trigger the excitation component to knock on the floor tiles to generate vibration and sound, and at the same time trigger the sensor unit to collect the sound signal and the vibration signal respectively.

[0131] Step 8: Hollow Drum Determination and Signal Generation

[0132] The sound signal and the vibration signal are obtained by the analysis and judgment unit respectively, and are processed by the signal collection unit and the signal processing unit respectively, and corresponding judgment values ​​are obtained. Then, the judgment values ​​obtained by the sampling signal and the detection signal are compared and analyzed to judge whether the floor tile is hollow, and a corresponding hollow signal is generated for the position of the floor tile judged to be hollow;

[0133] Step 9: Electric push rod and seal setting

[0134] The electric push rod is fixedly arranged on the detection frame, the hollow drum identification stamp is fixedly arranged on the output end of the electric push rod, and the output end of the electric push rod is arranged perpendicular to the ground.

[0135] Step 10: Add hollow drum markers

[0136] The hollow drum marking unit in the hollow drum detector is electrically connected to the electric push rod, and a hollow drum mark is added to the designated position of the corresponding floor tile when the hollow drum signal is generated.

[0137] The above formulas are all dimensionless and numerical calculations. The formula is a formula for the most recent real situation obtained by collecting a large amount of data and performing software simulation. The preset parameters and thresholds in the formula are set by technicians in this field according to actual conditions.

[0138] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A floor tile hollowing detection device, characterized in that: It includes a detection frame, an excitation component, and a hollow drum detector, wherein the excitation component and the hollow drum detector are fixedly arranged on the detection frame; The excitation component is used to strike the floor tiles to generate vibration and sound; The hollow drum detector comprises: The sensor unit includes a sound sensor and a vibration sensor, which are used to collect sound signals and vibration signals respectively; The signal collection unit collects the sound signal and the vibration signal collected by the sensor unit in a discrete manner and obtains a corresponding sound signal sequence and a vibration signal sequence; The signal processing unit is used to calculate the judgment value based on the discretized sound signal and vibration signal, and obtain the judgment value of the corresponding floor tile knocking position. The judgment value calculation method is as follows: Step 1, extract the sound signal sequence S = [s1, s2, ... sn] and the vibration signal sequence V = [v1, v2, ... vm]; Step 2, calculate the average values ​​of all si and all vj respectively, and mark them as Ps and Pv respectively; Step 3, calculate the standard deviation of all si and all vj respectively through the standard deviation formula, and mark them as Bs and Bv; Step 4, calculate the peak values ​​of all si and all vj respectively, and mark them as Fs and Fv; Step 5, through a specific formula: and Calculate the corresponding energy values ​​Es and Ev in all si and all vj respectively; Step 6: Substitute the results from Step 2 to Step 5 into the predetermined judgment value calculation formula and obtain the judgment value D of the corresponding knocking position; In the formula, β1, β2, β3, and β4 are the corresponding preset weight coefficients respectively; A sampling trigger unit is used to generate a sampling signal at a plurality of floor tiles which are known to have no hollows, and trigger the activation of the excitation component and the sensor unit; A detection trigger unit is used to generate a detection signal at all the floor tiles to be detected, and trigger the activation of the excitation component and the sensor unit; The analysis and judgment unit is used to obtain a sound signal and a vibration signal from the sampling signal and the detection signal respectively, and process them through the signal collection unit and the signal processing unit respectively, and obtain corresponding judgment values, and then compare and analyze the judgment values ​​obtained from the sampling signal and the detection signal respectively to determine whether the floor tiles are hollow.

2. A floor tile hollowing detection device according to claim 1, characterized in that: The discretization collection method is as follows: Set the sampling frequency to fs; According to the sampling frequency fs, a sound signal sequence S=[s1,s2,…sn] is obtained, where si represents the sound intensity value of the i-th sampling point, i=1, 2,…n, and n represents the number of sampling points corresponding to the sound signal sequence; According to the sampling frequency fs, the vibration signal sequence V=[v1, v2, ... vm] is obtained, where vj represents the vibration intensity value of the jth sampling point, j=1, 2, ... m, and m represents the number of corresponding sampling points in the vibration signal sequence.

3. A floor tile hollowing detection device according to claim 2, characterized in that: in, In the process of collecting sound signals and vibration signals, the corresponding intensity value represents the amplitude or intensity of the sound or vibration at a certain sampling point.

4. A floor tile hollowing detection device according to claim 1, characterized in that: The sampling signal is used to trigger the excitation component to knock the floor tiles to generate vibration and sound, and at the same time, the sound signal and the vibration signal are collected respectively by the trigger sensor unit; The detection signal is used to trigger the excitation component to knock on the floor tiles to generate vibration and sound, and at the same time, the sound signal and the vibration signal are collected respectively by triggering the sensor unit.

5. A floor tile hollowing detection device according to claim 4, characterized in that: The specific method of the analysis and determination unit is as follows: SS1. Obtain multiple decision values ​​corresponding to the sampled signal and mark them as Dt, where t=1, 2, ..., e, and e represents the number of decision values ​​corresponding to the sampled signal: SS2. Calculate the discrete value X of all the judgment values ​​corresponding to the sampled signal through the variance calculation formula; SS3, then compare the discrete value X with its corresponding preset discrete threshold value Xy: When X≤Xy, directly select a Dt with the maximum and minimum value from all Dt, and mark them as Dmax and Dmin respectively, and then form the standard judgment value interval [Dmin, Dmax]; When X>Xy, the corresponding Dt is deleted in descending order according to |Dt-Dp| and the remaining discrete values ​​X are calculated accordingly until X≤Xy; where Dp represents the average value of all Dt used in calculating the corresponding discrete value; Next, when X≤Xy, all Dt involved in the calculation of the corresponding discrete value X are obtained, and a Dt with the largest value and the smallest value is selected from all Dt, and they are marked as Dmax and Dmin respectively, and then they are combined into a standard judgment value interval [Dmin, Dmax]; SS4. Extract the judgment value corresponding to the detection signal and mark it as D0. Then match the judgment value D0 with the standard judgment value interval [Dmin, Dmax]: If Dmin≤D0≤Dmax, it means that there is no hollow drum at the designated position of the corresponding floor tile when the detection signal is generated; If any one of D0>Dmax and D0<Dmin is established, it means that there is a hollow at the designated position of the corresponding floor tile when the detection signal is generated, and a hollow signal is generated accordingly.

6. A floor tile hollowing detection device according to claim 5, characterized in that: Also included are electric push rods and hollow drum identification stamps; The electric push rod is fixedly arranged on the detection frame, the hollow drum identification stamp is fixedly arranged on the output end of the electric push rod, and the output end of the electric push rod is arranged perpendicular to the ground.

7. A floor tile hollowing detection device according to claim 6, characterized in that: The hollow drum detector also includes: The hollow drum marking unit is electrically connected to the electric push rod and is used to add a hollow drum mark at a designated position of the corresponding floor tile when a hollow drum signal is generated.

8. A floor tile hollowing detection device according to claim 6, characterized in that: in, The hollow drum identification seal is a return ink seal.

9. A method for detecting hollowing of floor tiles, characterized in that: The method is implemented by a floor tile hollowing detection device as described in any one of claims 1-8.

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