CN217083692U - Moving mechanism and detection device for detecting crack depth by using impact elastic wave method - Google Patents

Abstract

The utility model discloses a moving mechanism and detection device with ballistic wave method detection crack degree of depth. According to the first aspect, the moving mechanism for detecting the crack depth by using the impact elastic wave method comprises a fixed support, wherein a movable adjusting seat is arranged on the fixed support, at least two moving modules are arranged below the movable adjusting seat, a vibration exciting hammer module is connected below one of the moving modules, and sensor modules are connected below the other moving modules. In a second aspect, a device for detecting crack depth by using an impact elastic wave method comprises a device main body arranged on a fixed support, wherein the device main body is internally provided with the moving mechanism for detecting crack depth by using the impact elastic wave method, and the device main body is internally further provided with a power supply module and a signal transmitter which can store electricity. The utility model discloses can adopt different detection methods according to the degree of depth that the crack is different, it is high to detect the precision, and the suitability is strong.

Description

Moving mechanism and detection device for detecting crack depth by using impact elastic wave method

Technical Field

The utility model discloses concrete structure detects technical field, concretely relates to moving mechanism and detection device with ballistic wave method detection crack depth degree.

Background

The concrete cracks are complicated in reasons, mainly including material or climate factors, improper construction, wrong design and construction, and changes of use functions or unreasonable use, and can be generally summarized as the following: 1. when the concrete is not completely hardened, if the concrete is dried too fast, shrinkage cracks are generated, and the shrinkage cracks usually occur on the surface, and the cracks are irregular and small in width. 2. Temperature-dependent cracking. During the hardening period of the cement, the temperature difference between the surface of the concrete and the interior of the concrete is large, so that the surface of the concrete is subjected to rapid temperature change to generate large temperature reduction shrinkage, and cracks are generated due to the restriction of the interior concrete. 3. The design is less than perfect. If the section of the concrete is not enough, the span is too large, the height is small, or due to calculation errors, the stressed section is small, the reinforcement is not in proper position, the node is unreasonable and the like, the concrete is subjected to structural cracks. 4. Cracks caused by construction quality. The concrete cracks because of the lower grade of the concrete, the smaller section of the stressed steel bar, the size of the section which does not accord with the design, and the like; cracks formed by improper construction, sinking of formwork supports, or early removal of bottom molds and supports and the like; the construction control is not tight, and the load is overloaded, so that cracks appear. 5. In the use process, cracks can occur when the paint is not used properly, the load is increased, and the like.

Aiming at the crack depth detection of the concrete structure, currently, a propagation time difference method, a phase inversion method, a surface wave method and a ray scanning method are mainly adopted for testing, in the actual operation, the ray scanning method has large radiation to a human body and high cost, and a shock elastic wave method (the phase inversion method, the propagation time difference method and the surface wave method) is mostly adopted for testing so as to judge the crack depth inside the concrete.

In the field data acquisition process, the size of the vibration hammer needs to be distributed, wired and changed back and forth on site, signal quality can be seriously influenced by manual irregular hand-striking, the test efficiency is low, the data analysis method is complex, further optimization design is carried out aiming at the analysis method and the data receiving, transmitting and receiving mode, so that the judgment of crack depth, the detection efficiency and the like are facilitated, and the technical problem to be solved urgently by technical personnel in the field is solved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a moving mechanism and detection device with ballistic wave method detection crack degree of depth, it can adopt different detection methods according to the degree of depth that the crack is different, and it is high to detect the precision, and the suitability is strong.

In order to solve the technical problem, the utility model discloses a following scheme:

according to the first aspect, the moving mechanism for detecting the crack depth by using the shock elastic wave method comprises a fixed support, wherein the fixed support is used for being arranged on two sides of a crack to be detected, a moving adjusting seat stretching across the crack to be detected is arranged on the fixed support, at least two moving modules capable of moving along the extending direction of the moving adjusting seat are arranged below the moving adjusting seat, a signal exciting hammer module is connected to the lower portion of one of the moving modules, and sensor modules are connected to the lower portions of the rest moving modules. The method has the advantages that different methods are adopted for detection according to cracks of different depths, different detection methods can be met by adjusting the distance between the vibration exciter and the sensor modules and the number of the arranged sensor modules, and the detection efficiency is high.

The utility model discloses a detection method includes following step:

s1, judging the approximate range of the crack in advance according to the components, and then selecting a proper method and setting the distance between the sensor modules, wherein the crack depth is within the range of 20cm, and the propagation time difference method and the phase inversion method are preferentially adopted; testing by adopting a shock elastic wave method (surface wave method) when the crack exceeds 20 cm;

s2, when the phase inversion method is employed: compared with other concrete crack depth detection methods, the method for detecting the concrete crack depth by the aid of the head wave phase inversion method has the advantages that calculation through a formula is not needed, and detection is simple, visual, convenient and rapid;

s3, when adopting the propagation time difference method: the method is used for calculating the crack depth through the propagation time of the elastic wave at the position of the crack to be measured. Under the condition of a certain wave speed, the longer the propagation time is, the larger the crack depth is. The excitation signals are respectively received by two different sensor modules, and the crack depth can be determined by receiving the propagation time difference and the wave speed through the two signal sensors;

s4, when adopting the shock echo surface wave method: the surface wave method is used for testing the depth of the crack in the concrete, and a 'one-shot double-receiving' test mode is adopted in the test process. The receiving points are arranged at equal intervals across the crack, and the impact point is arranged at the same side of the signal sensor at the excitation end. When the surface wave generated by impact is transmitted to the signal sensor at the signal receiving end on the other side of the crack, the maximum amplitude of the surface wave is obtained by comparing the signal sensor at the excitation end with the signal sensor at the signal receiving end, and the depth of the crack to be detected is further obtained. The method has a wide test range and is slightly influenced by fillers, reinforcing steel bars and moisture. The crack depth h is calculated by the formula: h ═ ξ λ lnx;

s5, manually screening the acquired data, recording data of which the linearity and the amplitude of a waveform meet the test requirements, and repeating the steps to acquire data of a plurality of measuring points;

and S6, analyzing the acquired oscillogram to further obtain the depth of the crack.

Furthermore, the voltage amplitude of the excited signal is not more than 10V, the excited signal is not subjected to secondary excitation, and the excited signal can be stored only when meeting the requirement and being stable.

By adopting the detection method, a plurality of data can be acquired at one time, the accuracy and stability of the result can be ensured through the analysis of the plurality of data, the movable adjusting seat can be used for cracks with different lengths, the test of field personnel is greatly facilitated through the test system, the test efficiency and the accuracy are further improved, and the crack depth detection precision and efficiency are effectively improved.

Further, the movable adjusting seat comprises a measuring part and a fixing part, a dividing line or a dividing ruler is arranged on the measuring part, the width of the lower side of the fixing part is larger than that of the upper side, and a mounting groove matched with the fixing part is formed in the movable module. The method has the advantages that the distance between the moving modules is observed through the scale line or the scale with the scale lines, and the calculation processing of the crack depth is facilitated; when the movable module is installed, the movable module is installed on the fixed part from the end face of the fixed part, and the movable module is clamped through the structure of the fixed part, so that the movable module can slide back and forth on the fixed part along the extending direction of the movable adjusting seat while the movable module is prevented from falling downwards.

Furthermore, be equipped with the scale mark that extends along the extension direction of removal regulation seat on the measuring part lateral wall, the fixed part cross-section is trapezoidal form, and the lateral wall of moving module and the measuring part lateral wall that is equipped with the scale mark are in the coplanar when moving module installs on the fixed part, is equipped with the instruction symbol that is used for instructing moving module position on this lateral wall of moving module. The function of the mobile module is that the position of the mobile module is convenient to observe through the arrangement of the indication symbols.

Furthermore, be equipped with two sensor module that locate the crack both sides that await measuring respectively on removing the regulation seat, be equipped with excitation end signal sensor or receive end signal sensor in the sensor module, excitation end signal sensor locates and closes on the crack that awaits measuring one side of vibration hammer module department and excitation end signal sensor and vibration hammer module all locate the crack that awaits measuring, receives end signal sensor to locate the crack opposite side that awaits measuring. The method is suitable for measuring the depth of the crack by a propagation time difference method or a surface wave method.

Furthermore, a sensor module is arranged on the movable adjusting seat, a signal receiving end signal sensor is arranged in the sensor module, and the vibration exciting hammer module and the signal receiving end signal sensor are respectively arranged on two sides of the crack to be detected. The function of the method is that the method is suitable for measuring the depth of the crack by using a phase inversion method.

Furthermore, an excitation mechanism used for exciting the excitation hammer to strike the plane where the crack to be detected is located is arranged in the excitation hammer module, the excitation mechanism is connected with the moving module, and one end, far away from the moving module, of the excitation mechanism is connected with the excitation hammer capable of disassembling the hammer head. One end of the hammer handle of the vibration hammer is arranged in the excitation mechanism, and the other end of the hammer handle is in threaded connection with the hammer head of the vibration hammer. The hammer head of the vibration hammer adopts any one of 10mm, 17mm, 28mm and 48 mm. The vibration exciter hammer head has the effect that the vibration exciter hammer heads with different sizes are convenient to replace.

Furthermore, the sensor module comprises an excitation end signal sensor or a receiving end signal sensor arranged at the bottom end, an elastic mechanism connected with the mobile module is arranged above the excitation end signal sensor or the receiving end signal sensor, and a reset spring used for pushing the excitation end signal sensor or the receiving end signal sensor to the plane where the crack to be detected is located is arranged in the elastic mechanism. The function of the device is to enable the excitation end signal sensor or the receiving end signal sensor to be in contact with the plane where the crack to be detected is located in the detection process.

In a second aspect, a detection device for detecting crack depth by using an impact elastic wave method comprises a device main body arranged on a fixed support, wherein the device main body is internally provided with the above moving mechanism for detecting crack depth by using the impact elastic wave method, the fixed support is provided with at least one detachable mounting plate at a mounting moving adjusting seat, so that a moving module can be conveniently mounted or taken down, a power supply module capable of storing electricity and a signal transmitter for transmitting a received signal to an instrument host for processing the signal are further arranged in the device main body, the signal transmitter is connected with a sensor module, and the transmission mode of the signal transmitter adopts wired transmission or wireless transmission. The power module who adopts can supply the utility model discloses use more than 8 hours in succession. The length of the device body can be adjusted within 1m-2 m.

Furthermore, when the signal transmitter adopts a wired transmission mode, the sensor module is connected with the instrument host through a low-noise shielding cable. The low-noise shielding cable is connected with a BNC signal interface on the instrument host.

Furthermore, when the signal transmitter adopts a wireless transmission mode, the sensor module transmits the received signal to the instrument host through wifi or Bluetooth or radio frequency after receiving the signal excited by the exciting hammer.

The utility model discloses beneficial effect who has:

1. through the arrangement of the movable adjusting seat and the movable module, the vibration hammer and the sensor can be quickly adjusted to corresponding positions according to different detection methods required by cracks at different depths, and the detection efficiency and the detection applicability are improved;

2. through the arrangement of the measuring part and the indication symbol, the distance between the moving modules is conveniently measured, and the accurate measurement of the depth of the crack to be measured is facilitated.

Drawings

FIG. 1 is a schematic structural diagram of this embodiment 1;

FIG. 2 is a schematic view of the internal structure at A in FIG. 1;

FIG. 3 is a schematic view of the internal structure at B in FIG. 1;

FIG. 4 is a schematic perspective view of an adjusting movable seat with a movable module;

FIG. 5 is a side view of the structure of FIG. 4;

fig. 6 is a schematic diagram of a signal transmission relationship in embodiment 1;

FIG. 7 is a schematic structural view of embodiment 2;

FIG. 8 is a schematic view of the internal structure at C in FIG. 7;

fig. 9 is a schematic structural view of embodiment 3.

The reference numerals are explained below: 1. a crack to be detected; 2. a fixed bracket; 3. moving the adjusting seat; 4. a moving module; 5. a vibration exciting hammer module; 5a, an electromagnet; 5b, a permanent magnet; 5c, a motor; 5d, a connecting rod 6 and a sensor module; 7. a measuring section; 8. a fixed part; 9. scale lines; 10. an indicator symbol; 11. an excitation-side signal sensor; 12. a signal sensor at the trusted side; 13. an excitation mechanism; 14. a vibration hammer is excited; 14a, a hammer head; 14b, a hammer handle; 15. an elastic mechanism; 15a, a push rod; 15b, a housing; 15c, a limiting part; 16. a return spring; 17. a device main body; 18. a power supply module; 19. a signal transmitter; 20. and (4) an instrument host.

Detailed Description

The present invention will be described in further detail with reference to the following examples and drawings, but the present invention is not limited thereto.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and the terms are only for convenience of description of the present invention and simplifying the description, but do not indicate or imply that the device or element to which the term refers must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should be further noted that, unless otherwise explicitly specified or limited, the terms "disposed," "opened," "mounted," "connected," and "connected" are to be construed broadly, e.g., as either a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

As shown in fig. 1, in a first aspect, a moving mechanism for detecting crack depth by using a shock elastic wave method includes a fixed support 2 for being disposed at two sides of a crack 1 to be detected, a moving adjusting seat 3 spanning the crack 1 to be detected is disposed on the fixed support 2, three moving modules 4 capable of moving along the extending direction of the moving adjusting seat 3 are disposed below the moving adjusting seat 3, one of the moving modules 4 is connected with an excitation hammer module 5 below, and sensor modules 6 are connected below the other two moving modules 4. The method has the advantages that different methods are adopted for detection according to cracks with different depths, different detection methods can be met by adjusting the distance between the exciting hammer 14 and the sensor modules 6 and the number of the arranged sensor modules 6, and the detection efficiency is high.

Specifically, the amplitude of the voltage of the excited signal is 10V, the excited signal does not generate secondary excitation, and the excited signal can be stored only when meeting the requirement and being stable.

Specifically, as shown in fig. 4, the movable adjusting seat 3 includes a measuring portion 7 and a fixing portion 8, the measuring portion 7 is provided with scale marks 9, as shown in fig. 5, the cross section of the fixing portion 8 is trapezoidal, and the movable module 4 is provided with an installation groove matched with the fixing portion 8. The method has the advantages that the distance between the moving modules 4 is observed through the scale marks 9, and calculation processing of the crack depth is facilitated; when the movable module 4 is installed, the movable module 4 is installed on the fixing part 8 from the end face of the fixing part 8, the movable module 4 is clamped through the structure of the fixing part 8, and the movable module 4 can slide back and forth on the fixing part 8 along the extending direction of the movable adjusting seat 3 while the movable module 4 is prevented from falling down.

Specifically, as shown in fig. 4, when the moving module 4 is mounted on the fixing portion 8, the outer side wall of the moving module 4 and the side wall of the measuring portion 7 provided with the scale marks 9 are on the same plane, and the side wall of the moving module 4 is provided with an indication symbol 10 for indicating the position of the moving module 4. The function of the indicator is to facilitate the observation of the position of the mobile module 4 by the arrangement of the indicator 10.

Specifically, as shown in fig. 1, two sensor modules 6 respectively arranged at two sides of the crack 1 to be detected are arranged on the movable adjusting seat 3, an excitation end signal sensor 11 or a signal receiving end signal sensor 12 is arranged in the sensor modules 6, the excitation end signal sensor 11 is arranged at a position close to the exciting hammer module 5, the excitation end signal sensor 11 and the exciting hammer module 5 are both arranged at one side of the crack 1 to be detected, and the signal receiving end signal sensor 12 is arranged at the other side of the crack 1 to be detected. The function of the method is that the method is suitable for measuring the depth of the crack by a propagation time difference method or a surface wave method.

Specifically, as shown in fig. 1, an excitation mechanism 13 for exciting a vibration hammer 14 to strike a plane where the crack 1 to be measured is located is arranged in the vibration hammer module 5, the excitation mechanism 13 is connected with the mobile module 4, and one end, far away from the mobile module 4, of the excitation mechanism 13 is connected with the vibration hammer 14 with a detachable hammer. One end of a hammer handle of the vibration hammer 14 is arranged in the excitation mechanism 13, and the other end of the hammer handle is in threaded connection with a hammer head of the vibration hammer 14.

Specifically, as shown in fig. 2, 10mm is used for the hammer head of the exciting hammer 14. An electromagnet positioned at the bottom end and a permanent magnet connected with a hammer handle of the vibration exciter 14 are arranged in the excitation mechanism 13, the permanent magnet is positioned above the electromagnet, and a spring sleeved on the hammer handle is arranged between the electromagnet and the permanent magnet.

Specifically, as shown in fig. 1, the sensor module 6 includes an excitation end signal sensor 11 or a receiving end signal sensor 12 disposed at the bottom end, an elastic mechanism 15 connected to the mobile module 4 is disposed above the excitation end signal sensor 11 or the receiving end signal sensor 12, and a return spring 16 for pushing the excitation end signal sensor 11 or the receiving end signal sensor 12 to the plane where the crack 1 to be measured is located is disposed in the elastic mechanism 15.

Specifically, as shown in fig. 3, the elastic mechanism 15 includes a housing and a push rod connected to the excitation end sensor or the receiving end sensor, a limiting portion sleeved in the housing is disposed at the end of the push rod, the outer side wall of the limiting portion is matched with the inner wall of the housing, and a return spring 16 is disposed between the limiting portion and the mobile module 4. The function of the device is to enable the excitation end signal sensor 11 or the receiving end signal sensor 12 to be in contact with the plane of the crack 1 to be detected in the detection process.

In a second aspect, a detection device for detecting crack depth by using an impact elastic wave method comprises a device main body 17 arranged on a fixed support 2, wherein the device main body 17 is internally provided with the above moving mechanism for detecting crack depth by using the impact elastic wave method, the fixed support 2 is provided with at least one detachable mounting plate at a mounting moving adjusting seat 3, so that a moving module 4 can be conveniently mounted or dismounted, the mounting plate is connected with the fixed support 2 through a bolt, a power supply module 18 capable of storing electricity and a signal emitter 19 used for transmitting a received signal to an instrument host 20 for processing the signal are further arranged in the device main body 17, the signal emitter 19 is connected with a sensor module 6, and the transmission mode of the signal emitter 19 adopts wired transmission or wireless transmission. The adopted power supply module 18 can be used for the utility model to be used for more than 8 hours continuously. The length of the device body 17 can be adjusted within 1m-2 m.

Specifically, as shown in fig. 6, when the signal transmitter 19 adopts a wireless transmission mode, the sensor module 6 receives a signal excited by the vibration exciter 14, and transmits the received signal to the instrument host 20 through wifi or bluetooth.

The working principle of the embodiment is explained as follows, in the embodiment, the depth of the crack 1 to be measured is estimated to be less than 20cm, the propagation time difference method is adopted for detection, the excitation end signal sensor 11 and the receiving end signal sensor 12 are placed on two sides of the crack 1 to be measured, the excitation hammer module 5 is placed beside the excitation end signal sensor 11, and the crack depth is calculated through the propagation time of the elastic wave at the position of the crack 1 to be measured. Under the condition of a certain wave speed, the longer the propagation time is, the larger the crack depth is. Therefore, the depth of the crack can be determined by the propagation time difference and the wave velocity received by the excitation-side signal sensor 11 and the receiving-side signal sensor 12.

After the detection is finished, the signal is transmitted to the instrument host 20 for processing through the signal transmitter 19 in a wireless transmission mode.

The power module 18 is connected with the electromagnet, when the crack 1 to be detected is required to be knocked by the vibration hammer 14, the electromagnet is electrified to attract the permanent magnet to fall down, and the permanent magnet drives the hammer handle of the vibration hammer 14 to push the hammer head of the vibration hammer 14 to knock the crack 1 to be detected.

Example 2

As shown in fig. 7, a sensor module 6 is arranged on the movable adjusting base 3, a signal receiving end signal sensor 12 is arranged in the sensor module 6, and the exciting hammer module 5 and the signal receiving end signal sensor 12 are respectively arranged on two sides of the crack 1 to be measured. The function of the method is that the method is suitable for measuring the depth of the crack by using a phase inversion method.

Specifically, as shown in fig. 8, a motor and a connecting rod are arranged in the excitation mechanism 13, the connecting rod is connected to the output end of the motor in an eccentric manner, and the other end of the connecting rod is connected to the hammer handle of the vibration exciter 14.

The working principle of the embodiment is described as follows, in the embodiment, the depth of the crack 1 to be tested is estimated to be less than 20cm, and the phase inversion method is adopted for detection, so that the vibration hammer 14 and the signal receiving end signal sensor 12 are only required to be placed on two sides of the crack 1 to be tested for testing. Compared with other concrete crack depth detection methods, the method for detecting the concrete crack depth by the aid of the head wave phase inversion method has the advantages that calculation through a formula is not needed, and detection is simple, visual, convenient and rapid.

The rest of the structure and the operation principle are the same as those of the embodiment 1.

Example 3

As shown in fig. 9, the operation principle of the present embodiment is explained as follows, in the present embodiment, the depth of the crack 1 to be measured is estimated to be greater than 20cm, the surface wave method is adopted for detection, the excitation end signal sensor 11 and the receiving end signal sensor 12 are placed on both sides of the crack 1 to be measured, and the excitation hammer module 5 is placed beside the excitation end signal sensor 11. The surface wave method is used for testing the depth of the crack in the concrete, and a 'one-shot double-receiving' test mode is adopted in the test process. The receiving points are arranged at equal intervals across the crack, and the impact point is arranged at the same side of the channel with the sensor. When the surface wave generated by impact is transmitted to the other side of the crack for sensing, the maximum amplitude of the surface wave is obtained by comparing the excitation end signal sensor 11 with the receiving end signal sensor 12, and then the depth of the crack to be measured is obtained. The method has a wide test range and is slightly influenced by fillers, reinforcing steel bars and moisture. The crack depth h is calculated by the formula: h ═ ξ λ lnx.

The rest of the structure and the operation principle are the same as those of the embodiment 1.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and the technical essence of the present invention is that within the spirit and principle of the present invention, any simple modification, equivalent replacement, and improvement made to the above embodiments are all within the protection scope of the technical solution of the present invention.

Claims (10)

1. The utility model provides a moving mechanism with shock elastic wave method detection crack depth, is including being used for setting up fixed bolster (2) in crack (1) both sides that await measuring, its characterized in that: the movable adjusting device is characterized in that a movable adjusting seat (3) stretching across a crack (1) to be measured is arranged on the fixed support (2), at least two movable modules (4) capable of moving along the extending direction of the movable adjusting seat (3) are arranged below the movable adjusting seat (3), an exciting hammer module (5) is connected below one of the movable modules (4), and a sensor module (6) is connected below the other movable modules (4).

2. The moving mechanism for detecting crack depth by using a shock elastic wave method according to claim 1, wherein: remove regulation seat (3) including measuring part (7) and fixed part (8), be equipped with scale mark (9) or scale on measuring part (7), fixed part (8) downside width is greater than the upside width, be equipped with on movable module (4) with fixed part (8) assorted mounting groove.

3. The moving mechanism for detecting crack depth by using a shock elastic wave method according to claim 2, wherein: be equipped with on measuring portion (7) lateral wall along removing scale mark (9) that adjust seat (3) extending direction and carry out the extension, fixed part (8) cross-section is trapezoidal form, and the lateral wall of moving module (4) is in the coplanar with measuring portion (7) lateral wall that is equipped with scale mark (9) when moving module (4) are installed on fixed part (8), is equipped with on this lateral wall of moving module (4) and is used for instructing the indicator (10) of moving module (4) position.

4. The moving mechanism for detecting crack depth by using a shock elastic wave method according to claim 1, wherein: remove and be equipped with two sensor module (6) of locating crack (1) both sides that await measuring respectively on adjusting seat (3), two sensor module (6) are from exciting end signal sensor (11) and receiving end signal sensor (12) by nearly going far away from exciting hammer module (5) in proper order, one side that awaits measuring crack (1) is all located in near exciting hammer module (5) department and exciting end signal sensor (11) and exciting hammer module (5) in exciting end signal sensor (11), receive end signal sensor (12) and locate crack (1) opposite side that awaits measuring.

5. The moving mechanism for detecting crack depth by using a shock elastic wave method according to claim 1, wherein: the movable adjusting seat (3) is provided with a sensor module (6), a signal receiving end signal sensor (12) is arranged in the sensor module (6), and the vibration exciting hammer module (5) and the signal receiving end signal sensor (12) are respectively arranged on two sides of the crack (1) to be detected.

6. The moving mechanism for detecting crack depth by using a shock elastic wave method according to claim 1, wherein: be equipped with in excitation hammer module (5) and be used for arousing excitation hammer (14) to strike the planar excitation mechanism (13) of waiting to measure crack (1), excitation mechanism (13) are connected with mobile module (4), and the one end that the mobile module (4) was kept away from in excitation mechanism (13) is connected with excitation hammer (14) that can dismantle the tup.

7. The moving mechanism for detecting crack depth by using a shock elastic wave method according to claim 1, wherein: the sensor module (6) comprises an excitation end signal sensor (11) or a receiving end signal sensor (12) arranged at the bottom end, an elastic mechanism (15) connected with the mobile module (4) is arranged above the excitation end signal sensor (11) or the receiving end signal sensor (12), and a reset spring (16) used for pushing the excitation end signal sensor (11) or the receiving end signal sensor (12) to the plane where the crack (1) to be detected is located is arranged in the elastic mechanism (15).

8. The utility model provides a detection apparatus for detect crack depth with shock elastic wave method, is including locating device main part (17) on fixed bolster (2), its characterized in that: the device main body (17) is internally provided with a moving mechanism for detecting the crack depth by using a shock elastic wave method as claimed in any one of claims 1 to 7, the fixing support (2) is provided with at least one detachable mounting plate (21) at the position where the moving adjusting seat (3) is mounted, the device main body (17) is also internally provided with a power module (18) capable of storing electricity and a signal emitter (19) for transmitting a received signal to an instrument host (20) for processing the signal, the signal emitter (19) is connected with the sensor module (6), and the transmission mode of the signal emitter (19) adopts wired transmission or wireless transmission.

9. The apparatus for detecting crack depth by ballistic wave method according to claim 8, wherein: when the signal transmitter (19) adopts a wired transmission mode, the sensor module (6) is connected with the instrument host (20) through a low-noise shielded cable.

10. The apparatus for detecting crack depth by ballistic wave method according to claim 9, wherein: when signal transmitter (19) adopted the wireless transmission mode, sensor module (6) received the signal that the exciting hammer (14) arouses after, through wifi or bluetooth or radio frequency with received signal transmission to instrument host computer (20).

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