A manual-automatic integrated anchor rod non-destructive testing excitation device and its use method

Abstract

The present invention relates to the field of non-destructive testing technology, and specifically discloses a manual-automatic integrated anchor rod non-destructive testing excitation device and a method of use. The excitation system includes a small motor fixed on the excitation instrument housing, a dial arm turntable fixedly connected to the output end of the small motor, and an actuating arm that rotates in coordination with the dial arm turntable. The dial arm turntable is provided with two crescent-shaped convex grooves in a centrally symmetrical manner. A card slot is provided on the actuating arm close to the dial arm turntable. A force regulating rod that cooperates with the crescent-shaped convex groove is slidably installed in the card slot. The excitation system drives the actuating arm to rotate and strike a pin; the signal receiving system includes a positioning column, a stress wave signal receiving sensor fixed on the positioning column, a pin inserted in the middle of the positioning column for receiving the impact of the end of the actuating arm, and a reset spring sleeved on the outside of the pin and fixed on the positioning column at one end; the problem of unstable excitation and inconsistent excitation force each time, which affects the detection result, existing in the existing anchor rod stress wave non-destructive testing is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of non-destructive testing, and in particular discloses a manual-automatic integrated anchor rod non-destructive testing excitation device and a use method thereof. Background Art

[0002] During construction, a large number of newly built and existing anchor bolts develop internal defects due to construction and environmental factors. These defects pose a threat to the anchoring structure, posing a threat to human health, project safety, and other issues. Therefore, anchor bolt inspection is necessary to eliminate these hidden dangers. Due to the large aspect ratio and concealed nature of anchor bolt structures, comprehensive and accurate detection of internal defects is difficult using traditional methods. Therefore, stress wave-based nondestructive testing (NDT) methods have emerged. Vibrating the anchor bolt is a key step in this process.

[0003] Currently, there are two existing anchor vibration technologies used in stress wave nondestructive testing. The first, a small hammer tapping method, involves an operator striking the anchor with a handheld hammer to generate vibration. However, due to the varying force and pattern of each strike, the generated vibration signal varies, affecting the detection echo. Furthermore, improper operation can lead to multiple strikes, which can also affect signal reception. The second method uses an automatic vibration device, such as a magnetostrictive waveguide. However, this device requires a sufficient battery to operate properly, making it difficult to operate for extended periods during field operations. Summary of the Invention

[0004] In view of this, in order to solve the problems of unstable excitation and inconsistent excitation strength each time in the existing anchor stress wave non-destructive testing, which affect the test results, a manual and automatic integrated anchor non-destructive testing excitation device and a method of use are provided. The device has stable excitation, ensures that the excitation strength is consistent each time during the test, and can reduce interference with the test results; it also has the characteristics of manual and automatic integration, excitation / receiving signal integration, portability and simple and easy operation.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A manual-automatic integrated anchor bolt non-destructive testing vibration device includes a vibration instrument housing, a vibration system arranged in the vibration instrument housing, and a signal receiving system and a locking system arranged at the end of the vibration instrument housing;

[0007] The excitation system includes a small motor fixed to the vibrator housing, a dial arm turntable fixedly connected to the output end of the small motor, and an actuator arm that rotates in conjunction with the dial arm turntable. The actuator arm is rotatably mounted on the vibrator housing via a fixed rotating shaft. The dial arm turntable is provided with two crescent-shaped convex grooves in a centrally symmetrical manner. A slot is provided on the side of the actuator arm close to the dial arm turntable. A force adjustment rod that cooperates with the crescent-shaped convex groove is slidably mounted in the slot. A force spring with its end fixed to the vibrator housing is installed on the side of the actuator arm away from the dial arm turntable.

[0008] The signal receiving system includes a positioning column, a stress wave signal receiving sensor fixed on the positioning column, a striker plugged into the middle of the positioning column for receiving the impact of the end of the actuating arm, and a return spring sleeved on the outside of the striker and fixed at one end to the positioning column;

[0009] The locking system comprises a plurality of arc-shaped teeth fixed on the peripheral side of the end of the positioning column and a locking nut used in conjunction with the arc-shaped teeth.

[0010] The beneficial effects of this basic solution are as follows: The excitation system uses the lever principle to drive the movable arm to rotate the striker in the impact signal receiving system, and the stress wave signal receiving sensor receives the anchor impact signal. The locking system is used to fix the anchor to be tested.

[0011] Furthermore, a power supply system for driving a small electric motor to rotate is also provided in the inner cavity of the non-destructive testing vibration device. The power supply system includes a battery, a charging interface, a display screen, a function option button and a built-in control panel. Beneficial effect: The charging interface is a component for charging the battery, and the battery is used to power the entire instrument. The built-in control panel is provided with specific function programs, which can enable the vibration instrument to realize functions such as the excitation time interval, the number of excitations, and the selection of the excitation intensity. The function selection program is displayed on the display screen, and the function is selected and set through the function option button. The built-in control panel and the display screen are both powered by batteries.

[0012] Furthermore, a turntable fixing nut is fixedly installed in the middle of the turntable arm, and the end of the turntable fixing nut is provided with a concave hexagonal hole, into which a corresponding manual turning handle is inserted. Beneficial effect: The turntable fixing nut is used to fix the small motor and the turntable arm, and the manual turning handle is used to manually rotate the turntable arm, providing rotational kinetic energy for the turntable arm.

[0013] Furthermore, the manual handle is Z-shaped, and the side that connects to the turntable fixing nut is a hexagonal column that fits into the concave hexagonal hole. Beneficial Effect: The diameter of the hexagonal column at one end of the manual handle is slightly smaller than the diameter of the concave hexagonal hole in the turntable fixing nut, allowing it to be inserted into the concave hexagonal hole in the nut. The other end of the manual handle facilitates manual force application to rotate the turntable arm.

[0014] Furthermore, a plurality of sensor fixing grooves are opened on the periphery of the positioning column, and the stress wave signal receiving sensor is inserted into the corresponding sensor fixing groove, and the end portion is fixed to the positioning column through a sensor fixing nut.

[0015] Furthermore, the sensor fixing slot is in the shape of an elongated strip. Beneficial Effect: At least two elongated sensor fixing slots are provided around the positioning post to position the elongated columnar stress wave signal receiving sensor. The sensor can be moved within the sensor fixing slot to adjust its position. The sensor passes through the positioning post and is fixed to the positioning post by adding sensor fixing nuts at both ends.

[0016] Furthermore, an anvil is fixedly mounted on one end of the actuating arm near the striker. Beneficial effect: the anvil is used to more forcefully strike the striker on the positioning column, driving the striker to move back and forth and strike the anchor rod.

[0017] Furthermore, a force spring hook is fixedly mounted between the fixed-point rotating shaft of the actuator arm and the anvil plate, for securing the force spring. A collar for securing the force spring is also fixedly mounted on the vibrator housing below the force spring hook. Advantageous Effect: The design of the force spring hook on the actuator arm and the collar on the vibrator housing facilitates the replacement of force springs with different elastic coefficients.

[0018] Furthermore, a baffle with a matching height is provided on the outer peripheral side of the crescent convex pattern. Beneficial effect: the baffle constrains the force regulating rod.

[0019] A method for using a manual-automatic integrated anchor bolt non-destructive testing vibration excitation device comprises the following steps:

[0020] S1. Adjust the position of the stress wave signal receiving sensor according to the diameter of the anchor rod to be tested and fix it. Insert the end of the anchor rod to be tested into the locking mouth of the device so that the end of the anchor rod is in full contact with the stress wave signal receiving sensor and the striker is at a certain distance from the end face of the anchor rod. Fix the device to the anchor rod by tightening the locking nut.

[0021] S2. Turn on the built-in control panel, select the excitation time interval and excitation times through the function option button, and adjust the excitation force by moving the force adjustment rod in the slot;

[0022] S3, start the small motor, and the actuator arm hits the striker to complete the vibration, and the stress wave signal receiving sensor receives the anchor impact signal;

[0023] S4. When working in the field and the battery power is low, the vibration can be completed by manually turning the handle to rotate the dial of the arm to drive the fixed arm to rotate.

[0024] The working principle and beneficial effects of this solution are:

[0025] 1. The manual-automatic integrated anchor rod non-destructive testing vibration excitation device disclosed in the present invention stably fixes the device on the anchor rod to be tested by using a plurality of arc-shaped teeth and a locking nut around the end of the positioning column.

[0026] 2. The manual-automatic integrated anchor rod non-destructive testing vibration excitation device disclosed in the present invention can select the excitation frequency and the number of excitations through the function option button, and set the excitation intensity by adjusting the force regulating rod.

[0027] 3. The manual-automatic integrated anchor rod non-destructive testing excitation device disclosed in the present invention achieves the stability of the excitation through the arm turntable and the crescent convex pattern, force regulating rod, actuator arm and reset spring arranged on the arm turntable, ensuring that the excitation force is consistent each time during the test, avoiding multiple impacts on the anchor rod and affecting the receiving signal.

[0028] 4. The manual-automatic integrated anchor rod non-destructive testing vibration excitation device disclosed by the present invention can complete the vibration by manually turning the handle to rotate the dial of the dial arm to activate the fixed arm to rotate when the battery cannot supply power normally during field operations, and has strong applicability.

[0029] Other advantages, objects, and features of the present invention will be described in part in the following description and, in part, will be apparent to those skilled in the art upon examination of the following description or may be learned from practice of the present invention. The objects and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the structure of the manual-automatic integrated anchor bolt non-destructive testing excitation device without impact;

[0031] Figure 2 It is a structural schematic diagram of the manual-automatic integrated anchor bolt non-destructive testing vibration excitation device during impact;

[0032] Figure 3 It is a structural schematic diagram of the arm turntable and the actuating arm in the manual-automatic integrated anchor bolt non-destructive testing vibration excitation device of the present invention;

[0033] Figure 4 It is a structural schematic diagram of the locking system in the manual-automatic integrated anchor rod non-destructive testing vibration excitation device of the present invention;

[0034] Figure 5 It is a structural schematic diagram of the signal receiving system in the manual-automatic integrated anchor rod non-destructive testing excitation device of the present invention;

[0035] Figure 6 Schematic diagram of torque analysis of the actuator arm at different positions in the manual-automatic integrated anchor bolt non-destructive testing vibration device of the present invention;

[0036] Figure 7 This is a schematic diagram showing the relationship between the rotation angles of the force regulating rod and the actuating arm in the manual-automatic integrated anchor bolt non-destructive testing vibration device of the present invention.

[0037] The markings in the accompanying drawings are as follows: locking nut 1, stress wave signal receiving sensor 2, sensor fixing nut 3, reset spring 4, firing pin 5, sensor fixing slot 6, anvil 7, actuator arm 8, force spring 9, fixed-point rotating shaft 10, dial arm turntable 11, small motor 12, battery 13, display screen 14, function option button 15, charging port 16, sensor wire 17, manual turning handle 18, force adjusting rod 19, crescent convex pattern 20, turntable fixing nut 21, force spring hook 22, arc-shaped teeth 23, positioning column 24. DETAILED DESCRIPTION

[0038] The following is further described in detail through specific implementation methods:

[0039] like Figures 1 to 5 The manual-automatic integrated anchor bolt non-destructive testing vibration excitation device includes a vibration instrument housing, a vibration excitation system arranged in the vibration instrument housing, and a signal receiving system, a locking system and a power supply system for driving the vibration system arranged at the end of the vibration instrument housing.

[0040] The excitation system includes a small motor 12 fixed on the vibration instrument housing, an arm turntable 11 fixedly connected to the output end of the small motor 12 and an actuating arm 8 that rotates with the arm turntable 11; a turntable fixing nut 21 is fixedly installed in the middle of the arm turntable 11, and a concave hexagonal hole is provided at the end of the turntable fixing nut 21. A Z-shaped manual handle 18 is inserted into the concave hexagonal hole, and the side where the manual handle 18 is connected to the turntable fixing nut 21 is a hexagonal column that is compatible with the concave hexagonal hole. The small motor 12 and the arm turntable 11 are fixed by the turntable fixing nut 21. The diameter of the hexagonal column at one end of the manual handle 18 is slightly smaller than the diameter of the concave hexagonal hole of the turntable fixing nut 21, and is used to insert the nut into the concave hexagonal hole to provide rotational kinetic energy for the arm turntable 11. The other end of the manual handle 18 is convenient for manual force to rotate the arm turntable 11.

[0041] The actuating arm 8 is rotatably mounted on the vibrator housing via a fixed rotating shaft 10. The arm turntable 11 is provided with two crescent-shaped ridges 20 in a centrally symmetrical manner. A slot is provided on the side of the actuating arm 8 close to the arm turntable 11. A force adjusting rod 19 is slidably installed in the slot for use with the crescent-shaped ridge 20. A baffle with a height matching is provided on the outer peripheral side of the crescent-shaped ridge 20 to constrain the force adjusting rod 19. A force spring 9 with its end fixed to the vibrator housing is installed on the side of the actuating arm 8 away from the arm turntable 11.

[0042] The signal receiving system includes a positioning column 24, a stress wave signal receiving sensor 2 fixed on the positioning column 24, a striker 5 inserted in the middle of the positioning column 24 for receiving the impact of the end of the actuator arm 8, and a return spring 4 sleeved on the outside of the striker 5 and fixed on the positioning column 24 at one end. The other end of the return spring 4 is against the striker 5, so that after the striker 5 hits, the return spring 4 is forced to provide reset; two long strip sensor fixing grooves 6 are opened on the side of the positioning column 24, the stress wave signal receiving sensor 2 is inserted in the corresponding sensor fixing grooves 6, and the end is fixed on the positioning column 24 through the sensor fixing nut 3. The two long strip sensor fixing grooves 6 are used to position the long columnar stress wave signal receiving sensor 2. The sensor can move in the sensor fixing groove 6 to adjust the position. The sensor passes through the positioning column 24 and is fixed on the positioning column 24 by adding sensor fixing nuts 3 at both ends. The stress wave signal receiving sensor 2 is connected to the power supply system through the sensor wire 17.

[0043] An anvil 7 is fixedly installed on one end of the actuator arm 8 near the striker 5. The excitation system uses the lever principle to drive the anvil 7 fixed on the end of the actuator arm 8 to more forcefully strike the striker 5 on the positioning column 24, driving the striker 5 to move back and forth, striking the anchor rod, and realizing excitation.

[0044] A force spring hook 22 for fixing the force spring 9 is fixedly installed between the fixed rotating shaft 10 of the actuator arm 8 and the anvil plate 7, and a ring for fixing the force spring 9 is also fixedly installed on the vibrator housing below the force spring hook 22. Through the design of the force spring hook 22 on the actuator arm 8 and the ring on the vibrator housing, it is convenient to replace the force springs 9 with different elastic coefficients to achieve the adjustment of different excitation forces.

[0045] The locking system includes a plurality of arcuate teeth 23 fixed on the circumferential side of the end of the positioning column 24. The outer wall of the arcuate teeth 23 is provided with threads. The arcuate teeth 23 are adapted for use with the locking nut 1. By tightening the locking nut 1, the arcuate teeth 23 are contracted inward to bite the anchor rod end to be tested.

[0046] The power supply system includes a battery 13, a charging interface 16, a display screen 14, a function option button 15 and a built-in control panel; the charging interface 16 is a component for charging the battery 13, and the entire instrument is powered by the battery 13; the function selection program is displayed through the display screen 14, and the function is selected and set through the function option button 15. The built-in control panel and the display screen 14 are both powered by the battery 13.

[0047] The built-in control panel is equipped with a specific function program, which can select the functions such as the excitation time interval, the excitation frequency control and the excitation intensity control.

[0048] The control principle of (1) the excitation time interval and the number of excitations is:

[0049] The speed and rotation time of the small motor 12 are set through a specific function program to control the excitation time interval and number of excitations of the device. The two centrally symmetrical crescent convex patterns 20 set on the lever arm turntable 11 are used to move the force adjustment rod 19. Each crescent convex pattern 20 moves the force adjustment rod 19 once to complete one excitation. The lever arm turntable 11 rotates one circle to complete two excitations. Assuming the speed of the small motor 12 is n (r / s, revolutions / second), the excitation time interval is t, the number of excitations required is N, and the small motor 12 requires rotation time T, then:

[0050] Excitation time interval t:

[0051]

[0052] The small motor 12 needs to rotate for a time T:

[0053]

[0054] The excitation time interval can be controlled by setting the rotation speed of the small motor 12, and the rotation time T of the small motor can be controlled by inputting the number of excitation times.

[0055] (2) The control principle of excitation force control is:

[0056] like Figure 6 As shown, the excitation force is controlled as follows: When the actuator arm 8 rotates around the fixed rotation axis 10, the force spring 9 extends, generating a certain tension. Assume that the distance between the force spring hook 22 on the actuator arm 8 and the center of the rotation axis is l1, the distance between the anvil and the fixed rotation axis 10 is l2, the stiffness of the force spring 9 is k, and the extension after rotation is Δx. Then:

[0057] The tension F1 generated by the extension of the force spring 9 at the force spring hook 22 is:

[0058] F1=k×Δx (3)

[0059] In the force system of the actuator arm 8, the force spring 9, and the fixed-point rotating shaft 10, according to the principle of torque equivalence:

[0060] F1l1=F2l2 (4)

[0061] The equivalent force F2 generated by F1 at the anvil 7 is:

[0062]

[0063] In addition, the movement of the force regulating rod 19 can adjust the tension of the force spring 9, thereby controlling the excitation strength. The control principle of the force regulating rod 19 in the manual-automatic integrated anchor nondestructive testing excitation device is as follows:

[0064] When the arm turntable 11 rotates, when the relative position of the force adjusting rod 19 and the crescent convex pattern 20 changes from the tip to the round end, the force spring 9 stretches to generate a pulling force F1, the turntable continues to rotate, the force adjusting rod 19 loses its support, and the actuating arm 8 rotates rapidly in the opposite direction under the pulling force of the force spring 9 at the other end. The anvil plate 7 is accelerated to hit the firing pin 5 under the action of the equivalent force F2.

[0065] like Figure 7 As shown, in the concentric circles with the fixed-point rotating shaft 10 as the center, circles of different radii with the same chord length a (AB=A1B1=a) correspond to different central angles (∠AOB≠∠A1OB1). In the present invention, a corresponds to the difference between the distance from the tip of the crescent ridge 20 on the lever arm turntable 8 to the center of the lever arm turntable and the distance from the round end of the crescent ridge 20 to the center of the lever arm turntable. According to this principle, when the position of the force adjusting rod 19 is changed, the rotation angle of the actuating arm 8 changes, the elongation of the force spring 9 is different, and the generated pulling force F1 changes.

[0066] The method for using the manual-automatic integrated anchor rod non-destructive testing vibration excitation device comprises the following steps:

[0067] S1. Adjust the position of the stress wave signal receiving sensor 2 according to the diameter of the anchor rod to be tested and fix it. Insert the end of the anchor rod to be tested into the locking mouth of the device so that the end of the anchor rod is in full contact with the stress wave signal receiving sensor 2 and the striker 5 is at a certain distance from the end face of the anchor rod without contact. Fix the device on the anchor rod by tightening the locking nut 1.

[0068] S2. Turn on the built-in control panel, select the excitation time interval and the number of excitations through the function option button 15, and adjust the excitation force by moving the force adjustment rod 19 in the position of the card slot;

[0069] S3, start the small motor 12, the small motor 12 drives the lever arm turntable 11 to rotate, the crescent convex pattern 20 on the lever arm turntable 11 rotates to push the force adjusting rod 19 fixed on the actuating arm 8 toward the center of the lever arm turntable 11, and the force adjusting rod 19 drives the actuating arm 8 to rotate around the fixed rotating shaft. The rotation of the actuating arm 8 extends the force applying spring 9, thereby generating a pulling force on the actuating arm 8. When the crescent convex pattern 20 rotates to the contact point between the force adjusting rod 19 and the round end of the crescent convex pattern 20, the crescent convex pattern 20 continues to rotate to make the force adjusting rod 19 on the actuating arm 8 lose support, and the actuating arm 8 rotates rapidly in the opposite direction under the tension of the force applying spring 9. The actuating arm 8 rotates rapidly to make the anvil plate 7 at the other end hit the striker 5 at a certain speed, completing the excitation, and receiving the anchor impact signal through the stress wave signal receiving sensor 2;

[0070] S4. During field operations, when the battery 13 is low on power, the manual handle 18 is used to rotate the arm turntable 11 to cause the fixed arm to rotate and complete the vibration.

[0071] The above description is merely an embodiment of the present invention. Common knowledge regarding the specific structure and characteristics of the solution is not described in detail herein. It should be noted that those skilled in the art will be able to make various modifications and improvements without departing from the structure of the present invention. These modifications and improvements should also be considered within the scope of protection of the present invention and will not affect the effectiveness and practicality of the present invention.

Claims

1. A manual-automatic integrated anchor bolt non-destructive testing vibration excitation device, characterized by: It includes a vibration instrument housing, a vibration excitation system arranged in the vibration instrument housing, and a signal receiving system and a locking system arranged at the end of the vibration instrument housing; The excitation system includes a small motor fixed to the vibration instrument housing, a dial arm turntable fixedly connected to the output end of the small motor, and an actuating arm that rotates in coordination with the dial arm turntable. The actuating arm is rotatably mounted on the vibration instrument housing via a fixed rotating shaft. The dial arm turntable is provided with two crescent-shaped convex patterns in a centrally symmetrical manner. A card slot is provided on the side of the actuating arm close to the dial arm turntable. A force regulating rod that cooperates with the crescent-shaped convex pattern is slidably mounted in the card slot. A force spring with an end portion fixed to the vibration instrument housing is mounted on the side of the actuating arm away from the dial arm turntable. The signal receiving system includes a positioning column, a stress wave signal receiving sensor fixed on the positioning column, a striker plugged into the middle of the positioning column for receiving the impact of the end of the actuating arm, and a return spring sleeved outside the striker and fixed at one end to the positioning column; The locking system includes a plurality of arc-shaped teeth fixed to the circumference of the end of the positioning column and a locking nut used in conjunction with the arc-shaped teeth; The inner cavity of the non-destructive testing excitation device is also provided with a power supply system for driving the small motor to rotate, and the power supply system includes a battery, a charging interface, a display screen, function option buttons and a built-in control panel; A turntable fixing nut is fixedly installed at the middle of the dial arm turntable, and an end of the turntable fixing nut is provided with a concave hexagonal hole, and a matching manual turning handle is inserted into the concave hexagonal hole.

2. The manual-automatic integrated anchor bolt non-destructive testing vibration excitation device according to claim 1 is characterized in that: The manual turning handle is Z-shaped, and one side of the manual turning handle that is plugged into the turntable fixing nut is a hexagonal column that is matched with the concave hexagonal hole.

3. The manual-automatic integrated anchor bolt non-destructive testing vibration excitation device according to claim 1 is characterized in that: A plurality of sensor fixing grooves are provided on the periphery of the positioning column. The stress wave signal receiving sensor is inserted into the corresponding sensor fixing grooves, and the end portion is fixed to the positioning column through a sensor fixing nut.

4. The manual-automatic integrated anchor bolt non-destructive testing vibration excitation device according to claim 3 is characterized in that: The sensor fixing groove is in a long strip shape.

5. The manual-automatic integrated anchor bolt non-destructive testing vibration excitation device according to claim 1 is characterized in that: An anvil is fixedly mounted on one end of the actuating arm close to the striker.

6. The manual-automatic integrated anchor bolt non-destructive testing vibration excitation device according to claim 5, characterized in that: A force spring hook for fixing a force spring is fixedly installed between the fixed-point rotating shaft of the actuating arm and the anvil plate, and a collar for fixing a force spring is also fixedly installed on the vibration instrument housing below the force spring hook.

7. The manual-automatic integrated anchor bolt non-destructive testing vibration excitation device according to claim 1, characterized in that: A baffle with a matching height is provided on the outer peripheral side of the crescent convex pattern.

8. A method for using a manual-automatic integrated anchor bolt non-destructive testing vibration excitation device, characterized in that: The following steps are involved: S1. Adjust the position of the stress wave signal receiving sensor according to the diameter of the anchor rod to be tested and fix it. Insert the end of the anchor rod to be tested into the locking mouth of the device so that the end of the anchor rod is in full contact with the stress wave signal receiving sensor and the striker is not in contact with the end face of the anchor rod. Secure the device to the anchor rod by tightening the locking nut. S2. Turn on the built-in control panel, select the excitation time interval and excitation times through the function option button, and adjust the excitation force by moving the force adjustment rod in the slot; S3, start the small motor, and the actuator arm hits the striker to complete the vibration, and the stress wave signal receiving sensor receives the anchor impact signal; S4. When working in the field and the battery power is low, the vibration can be completed by manually turning the handle to rotate the dial of the arm to drive the fixed arm to rotate.

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