Pulsed electromagnetic ultrasonic thickness gauge

Abstract

The present application relates to the technical field of thickness gauges. Disclosed is a pulsed electromagnetic ultrasonic thickness gauge, comprising a main unit (1), wherein a probe (2) is electrically connected to the bottom of the main unit (1), and the probe (2) comprises a protective shell (21); an electromagnet (22), a magnetostrictive torsional guided-wave sensor (23) and a helical coil (24) are provided inside the protective shell (21); and the electromagnet (22) is configured to generate an alternating magnetic field. In the present application, by means of replacing a permanent magnet inside the probe (2) with the electromagnet (22), during thickness measurement, the electromagnet (22) can perform the same function as the permanent magnet, such that the probe (2) has a basic static magnetic field to meet the requirements for ultrasonic excitation, and after the thickness measurement is completed, the magnetic attraction effect of the probe can be stopped by means of powering off same.

Description

Pulsed electromagnetic electromagnetic ultrasonic thickness gauge TECHNICAL FIELD

[0001] The present application relates to the technical field of thickness gauges, more particularly to a pulsed electromagnetic electromagnetic ultrasonic thickness gauge. BACKGROUND

[0002] The pulsed electromagnetic electromagnetic ultrasonic thickness gauge is an instrument for measuring the thickness of materials using electromagnetic ultrasonic technology. It measures the thickness of materials by sending pulsed electromagnetic signals to the measured material, using the principle of eddy current and ultrasonic wave reflection generated inside the material. The electromagnetic pulse generator in the instrument generates high-frequency electromagnetic pulses, which are sent to the surface of the measured material through the probe. At the surface of the measured material, the high-frequency electromagnetic pulses excite eddy currents, which propagate inside the measured material and generate ultrasonic waves. The ultrasonic waves propagate inside the material and are reflected at the other interface (such as the bottom surface or defects) of the material. The reflected ultrasonic wave signals are received by the probe and transmitted to the signal processing system. The signal processing system processes the received signals through filtering, amplification, digitization, etc., and finally calculates the thickness of the material.

[0003] The existing pulsed electromagnetic electromagnetic ultrasonic thickness gauge still has defects when in use. For example, the instrument probe has a magnetic force, which has an adsorption effect on the measured object. After detection, the probe needs to be separated from the measured object by manual force, which is not convenient. In addition, in special detection environments, the angle and distance between the probe and the measured object need to be adjusted, and manual adjustment has insufficient stability and precision, which can easily cause measurement errors. When the surface of the measured object is curved, concave, or has other irregular shapes, the probe angle needs to be adjusted to ensure that the probe and the object are perpendicular. When the surface of the measured object is covered with a thick coating, paint, varnish, or other materials, the distance between the probe and the measured object needs to be adjusted, and the ultrasonic wave will have more space attenuation in the propagation process, but at the same time, it can also obtain stronger penetration energy, which is convenient for penetrating the covering on the material. SUMMARY

[0004] In order to overcome the above-mentioned defects of the prior art, the present application provides a pulsed electromagnetic electromagnetic ultrasonic thickness gauge to solve the problem that the traditional pulsed electromagnetic electromagnetic ultrasonic thickness gauge probe is affected by the magnetic force and is difficult to separate from the measured object. In special measurement environments, adjusting the angle and distance between the probe and the measured object can easily cause measurement errors.

[0005] The application provides the following technical scheme: a pulse electromagnetic electromagnetic ultrasonic thickness gauge, comprising a host computer, the host computer bottom electrically connected with a probe, the probe comprises a protective shell, the protective shell is internally provided with an electromagnet, a magnetostrictive torsional guided wave sensor and a spiral coil, the electromagnet is used for generating an alternating magnetic field, and the magnetostrictive torsional guided wave sensor is used for receiving the torsional guided wave reflected by the measured object;

[0006] The probe bottom is assembled with a height and angle adjusting disc rack A, the height and angle adjusting disc rack A comprises a main body disc rack, the front surface of the main body disc rack is provided with a front leg and a rear leg, the back surface is provided with a back front leg and a back rear leg, the inside of the main body disc rack is provided with two drive mechanisms and four combination mechanisms, the four combination mechanisms are respectively connected with the front leg, the back front leg, the rear leg and the back rear leg through four belt transmission mechanisms, and the top of the main body disc rack is provided with a valve type transmission mechanism; the two drive mechanisms are connected through the valve type transmission mechanism, the two drive mechanisms are assembled with the four combination mechanisms, and the two drive mechanisms, the four combination mechanisms and the valve type transmission mechanism are matched to control the front leg, the back front leg, the rear leg and the back rear leg to independently operate and combinedly operate.

[0007] In an embodiment, the top of the main body disc rack is provided with an embedding groove penetrating to the bottom, the embedding groove is matched with the probe in shape and size, embedding groove interiors are provided with a placing space one on both sides of the embedding groove, the inside of the main body disc rack is provided with a placing space two on the front and back surfaces of the embedding groove, the two drive mechanisms and the four combination mechanisms are respectively arranged in the two placing space ones, and the four belt transmission mechanisms are respectively arranged in the two placing space twos when the height and angle adjusting disc rack A is assembled on the probe bottom.

[0008] In an embodiment, the front leg, the back front leg, the rear leg and the back rear leg are all provided with casters.

[0009] In an embodiment, the drive mechanism comprises a rotating cylinder and a rotating rod, two polygonal combination columns are slidably sleeved in the rotating cylinder, the two polygonal combination columns extend to the front and rear ends of the rotating cylinder and are longitudinally aligned with the input ends of the two combination mechanisms, annular sliding grooves are formed in the side walls of the two polygonal combination columns, and a lever is movably sleeved in each annular sliding groove, a connecting frame one is movably sleeved in the side wall of the rotating cylinder, the connecting frame one is fixedly connected to the inner wall of the main body disc rack, the rotating rod penetrates from the top to the inside of the main body disc rack, the rotating rod is connected with the valve type transmission mechanism, a driving bevel gear one is fixedly connected to the bottom end of the rotating rod, a driven bevel gear one is engaged with the side wall of the driving bevel gear one, and the driven bevel gear one is fixedly connected to the side wall of the rotating cylinder.

[0010] In an embodiment, the combination mechanism comprises a fixed shell, a worm is movably sleeved on the inner wall of the fixed shell, a worm wheel is engaged on the side wall of the worm, the inner wall of the worm wheel is connected with a belt transmission mechanism through a connecting shaft, a passive bevel gear two is fixedly connected on the side wall of the worm, an active bevel gear two is engaged on the side wall of the passive bevel gear two, a through hole is formed in the back of the fixed shell and extends to the inside, a reversing column is movably sleeved in the through hole, the reversing column is fixedly connected with the inner wall of the active bevel gear two, and an end column for combination with the polygonal combination column is arranged on the back of the reversing column.

[0011] In an embodiment, the end column is in the shape of a polygon, and a slot matching the shape and size of the end column is formed at one end of the polygonal combination column.

[0012] In an embodiment, the valve type transmission mechanism comprises two belt pulleys one, two double-groove belt pulleys, a first belt pulley two and a second belt pulley two, the two belt pulleys one are fixedly connected on the side wall of the rotating rod of the two driving mechanisms, the two double-groove belt pulleys and the first belt pulley two are movably sleeved on the top of the main disc frame, the belt pulley one is drivingly connected with the double-groove belt pulley through a transmission belt one, the double-groove belt pulley is drivingly connected with the first belt pulley two through a transmission belt two, a connector is mounted on the top, two through holes extending to the inside are formed in the top, and the output end of the connector is combined and connected with the two first belt pulleys two through the two through holes.

[0013] In an embodiment, the connector comprises an outer fixed shell, an inner movable shell is slidably sleeved in the inner fixed shell, two intermeshing linkage gears are movably sleeved on the inner wall of the inner movable shell, a polygonal bottom column is fixedly connected at the bottom center of each linkage gear, the two polygonal bottom columns extend to the bottom of the inner movable shell, a connecting groove matching the shape and size of the connector is arranged on the top of each first belt pulley two, a threaded hole extending to the inside is formed in the top of the outer fixed shell, a screw is threadedly sleeved in the threaded hole, and the bottom end of the screw is movably connected with the top of the inner movable shell.

[0014] In an embodiment, the front legs and the rear legs are arranged in the two inner recesses.

[0015] In an embodiment, two limiting grooves are formed in the two sides of the main disc frame, and one end of each of the two shift rods away from the polygonal combination column extends through the two limiting grooves.

[0016] The technical effects and advantages of the present application are as follows:

[0017] The application replaces the permanent magnet inside the probe with an electromagnet. In thickness measurement, the electromagnet can provide the same effect as the permanent magnet, so that the probe has a basic static magnetic field to meet the demand of ultrasonic excitation. After the thickness measurement is completed, the probe loses the magnetic attraction effect by power-off. Compared with the traditional structure probe, the probe does not need to exert a large force when separating from the measured object, so that the thickness measuring instrument is more convenient to use.

[0018] In addition, a magnetostrictive torsional guided wave sensor is also added in the probe. The magnetostrictive effect is used to realize non-contact and high-precision measurement of the thickness measuring instrument, and to improve the long-distance detection capability, especially for complex structures and harsh environments, such as high temperature and high pressure. At the same time, the sensor output is stable, the anti-interference performance is strong, and the accuracy of the measurement result is ensured.

[0019] The height and angle adjusting disc rack A is assembled, which can stabilize and fix the instrument probe when the instrument is used to measure the object with a curved surface or coated with a coating, so as to improve the stability of the thickness measuring instrument in special measurement environment.

[0020] When the height and angle adjusting disc rack A is used, the front right leg, the back right leg, the front left leg and the back left leg can be precisely controlled and turned over alone or synchronously under the cooperation of the two driving mechanisms and the valve type transmission mechanism, so as to realize precise and convenient height and angle adjusting effect. Through the matching relationship of the structure, the height and angle adjusting disc rack A is convenient to operate and has high adjusting precision, which can help the instrument probe to achieve more accurate distance and angle, and improve the measurement precision of the instrument in special measurement environment. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 is a schematic diagram of the overall structure in one or some embodiments of the application;

[0022] Fig. 2 is a schematic diagram of the probe structure module in Fig. 1 of the application;

[0023] Fig. 3 is an exploded schematic diagram of the height and angle adjusting disc rack A structure in Fig. 1 of the application;

[0024] Fig. 4 is a top view of the height and angle adjusting disc rack A in Fig. 1 of the application;

[0025] Fig. 5 is a cross-sectional top view of the main disc rack in Fig. 3 of the application;

[0026] Fig. 6 is a schematic diagram of the driving mechanism structure in Fig. 3 of the application;

[0027] Fig. 7 is a schematic diagram of the combination mechanism structure in Fig. 3 of the application;

[0028] Fig. 8 is a schematic diagram of the valve type transmission mechanism structure in Fig. 3 of the application;

[0029] Fig. 9 is a front view of the height and angle adjusting disc rack A in Fig. 1 of the application;

[0030] Figure 10 is a side view of the height and angle adjusting dial holder A in Figure 1 of the present application.

[0031] The reference signs are: 1, main machine; 2, probe; 21, protective shell; 22, electromagnet; 23, magnetostrictive torsional wave sensor; 24, spiral coil; 3, main body dial holder; 4a, front front leg; 4b, back front leg; 5a, front rear leg; 5b, back rear leg; 6, driving mechanism; 7, combination mechanism; 8, belt transmission mechanism; 9, valve transmission mechanism; 31, embedding groove; 32, placing space one; 33, placing space two; 34, inner groove; 35, limiting groove; 61, rotating cylinder; 62, polygonal combination column; 63, lever; 64, passive bevel gear one; 65, active bevel gear one; 66, rotating rod; 67, connecting frame one; 68, connecting frame two; 71, fixed shell; 72, worm gear; 73, worm; 74, passive bevel gear two; 75, active bevel gear two; 76, reversing column; 77, end column; 78, connecting shaft; 91, pulley one; 92, double-groove pulley; 93, first pulley two; 94, second pulley two; 95, connector; 951, outer fixed shell; 952, inner movable shell; 953, linkage gear; 954, polygonal bottom column; 955, screw rod. DETAILED DESCRIPTION

[0032] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0033] Referring to Figures 1-3, the present application provides a pulse electromagnetic electromagnetic ultrasonic thickness gauge, comprising a main machine 1, the bottom of the main machine 1 is electrically connected with a probe 2, characterized in that: the probe 2 comprises a protective shell 21, the inside of the protective shell 21 is provided with an electromagnet 22, a magnetostrictive torsional wave sensor 23 and a spiral coil 24, the electromagnet 22 is used to generate an alternating magnetic field, and the magnetostrictive torsional wave sensor 23 is used to receive the torsional wave reflected by the measured object;

[0034] The probe 2 is assembled with a height and angle adjusting dial holder A at the bottom, the height and angle adjusting dial holder A comprises a main body dial holder 3, the front of the main body dial holder 3 is provided with a front front leg 4a and a front rear leg 5a, the back of the main body dial holder 3 is provided with a back front leg 4b and a back rear leg 5b, the inside of the main body dial holder 3 is provided with two driving mechanisms 6 and four combination mechanisms 7, the four combination mechanisms 7 are respectively connected with the front front leg 4a, the back front leg 4b, the front rear leg 5a and the back rear leg 5b through four belt transmission mechanisms 8, the main body dial holder 3 is installed with a valve transmission mechanism 9 at the top, the two driving mechanisms 6 are connected through the valve transmission mechanism 9, the two driving mechanisms 6 are assembled with the four combination mechanisms 7, and the two driving mechanisms 6, the four combination mechanisms 7 and the valve transmission mechanism 9 are matched to control the front front leg 4a, the back front leg 4b, the front rear leg 5a and the back rear leg 5b to operate independently or in combination.

[0035] Referring to Figures 4, 5, the top of the main disc frame 3 is provided with an embedded groove 31 penetrating to the bottom, the shape and size of the embedded groove 31 are adapted to the probe 2, the inside of the embedded groove 31 is provided with a placing space one 32 on both sides of the embedded groove 31, the inside of the main disc frame 3 is provided with a placing space two 33 on the front and back of the embedded groove 31, two driving mechanisms 6 and four combination mechanisms 7 are respectively arranged in the two placing space ones 32, and four belt drive mechanisms 8 are respectively arranged in the two placing space twos 33, when the height and angle adjusting disc frame A is assembled at the bottom of the probe 2, in order to avoid the blocking effect of the probe 2 on the measurement accuracy, the probe 2 is embedded in the inside of the embedded groove 31 by setting the embedded groove 31, which can avoid the blocking condition caused by the height and angle adjusting disc frame A, and the setting of the placing space one 32 and the placing space two 33 can reasonably plan the installation position of the driving mechanism 6, the combination mechanism 7 and the belt drive mechanism 8, so as to avoid the influence caused by the embedded groove 31.

[0036] Referring to Figures 3, 9, the turnover end of the front front leg 4a, the back front leg 4b, the front rear leg 5a and the back rear leg 5b are provided with casters, when multiple points need to be measured on the measured object, since the magnetostrictive torsional wave sensor 23 of the probe 2 has an adsorption effect between the probe 2 and the measured object of iron material when it operates, there is a relatively laborious resistance by directly translating the instrument, and the operation process is too complex by removing the magnetic attraction effect through the power-off mode of the magnetostrictive torsional wave sensor 23, therefore, the casters are set to make the magnetostrictive torsional wave sensor 23 under the effect of continuous power, and the translating instrument can still achieve the labor-saving effect to realize the multi-point measurement.

[0037] Referring to Figure 6, the driving mechanism 6 comprises a rotating cylinder 61, a rotating rod 66, the rotating cylinder 61 is internally sleeved with two polygonal combination columns 62, the two polygonal combination columns 62 extend to the front and rear ends of the rotating cylinder 61 and are longitudinally aligned with the input ends of the two combination mechanisms 7, the side walls of the two polygonal combination columns 62 are each provided with an annular sliding groove, and the two annular sliding grooves are each movably sleeved with a push rod 63, the rotating cylinder 61 is movably sleeved with a connecting frame one 67, the connecting frame one 67 is fixedly connected to the inner wall of the main disc frame 3, the rotating rod 66 penetrates through the main disc frame 3 from the top to the inside, the rotating rod 66 is connected with the valve type transmission mechanism 9, the bottom end of the rotating rod 66 is fixedly connected with a driving bevel gear one 65, the side wall of the driving bevel gear one 65 is engaged with a driven bevel gear one 64, the driven bevel gear one 64 is fixedly connected to the side wall of the rotating cylinder 61, the side wall of the rotating rod 66 is movably sleeved with a connecting frame two 68, the connecting frame two 68 is fixedly connected to the inner wall of the main disc frame 3, the driving bevel gear one 65 is driven to rotate by rotating the rotating rod 66, the driven bevel gear one 64 is driven to rotate by the meshing relationship between the driven bevel gear one 64 and the driving bevel gear one 65, the polygonal combination column 62 is driven to rotate by the polygonal combination column 62, the polygonal combination column 62 is driven to translate by pushing the push rod 63, and the polygonal combination column 62 is combined with the combination mechanism 7, so as to drive the combination mechanism 7 to operate.

[0038] Referring to Figure 7, the combination mechanism 7 comprises a fixed shell 71, the inner wall of the fixed shell 71 is movably sleeved with a worm 73, the side wall of the worm 73 is engaged with a worm wheel 72, the inner wall of the worm wheel 72 is connected with the belt transmission mechanism 8 through a connecting shaft 78, the side wall of the worm 73 is fixedly connected with a driven bevel gear two 74, the side wall of the driven bevel gear two 74 is engaged with a driving bevel gear two 75, the fixed shell 71 is provided with a rotating hole penetrating through the inside, the rotating hole is movably sleeved with a reversing column 76, the reversing column 76 is fixedly connected with the inner wall of the driving bevel gear two 75, the back of the reversing column 76 is provided with an end column 77 for combining with the polygonal combination column 62, when the polygonal combination column 62 is combined with the end column 77, the end column 77 is driven to rotate by the driving mechanism 6, the combination mechanism 7 is driven to rotate by the end column 77 driving the reversing column 76 to rotate, the worm 73 is driven to rotate by the driving bevel gear two 75 according to the meshing relationship between the driving bevel gear two 75 and the driven bevel gear two 74, the worm wheel 72 is driven to rotate by the meshing relationship between the worm wheel 72 and the worm 73, so as to drive the belt transmission mechanism 8 to operate by the connecting shaft 78, when the front legs 4a, 4b, the rear legs 5a, 5b are turned over to form support, they are easy to be passively turned over under the influence of external force, in order to avoid this situation, the worm wheel 72 and the worm 73 are arranged to cooperate, which can achieve one-way locking effect according to its characteristics, so as to drive the combination mechanism 7 to rotate while connecting and transmitting the rotating force of the driving mechanism 6, and also avoid the front legs 4a, 4b, the rear legs 5a, 5b from being turned over due to external force.

[0039] Referring to FIG. 6, 7, the end column 77 is shaped as a polygon, and the polygonal combination column 62 is provided with a slot matching the shape and size of the end column 77 at one end. After the end column 77 is inserted into the slot of the polygonal combination column 62 after the polygonal combination column 62 is translated, the assembly effect is achieved. According to the shape characteristics of the end column 77 and the slot of the polygonal combination column 62, the polygonal combination column 62 can drive the end column 77 to rotate.

[0040] Referring to FIG. 8, the valve type transmission mechanism 9 includes two belt pulleys one 91, two double-groove pulleys 92, two belt pulleys two, which are a first belt pulley two 93 and a second belt pulley two 94. The two belt pulleys one 91 are fixedly connected to the side wall of the rotating rod 66 of the two drive mechanisms 6, respectively. The two double-groove pulleys 92 and the first belt pulley two 93 are movably sleeved on the top of the main disc rack 3. The belt pulley one 91 and the double-groove pulley 92 are connected by a transmission belt one, and the double-groove pulley 92 and the first belt pulley two 93 are connected by a transmission belt two. The second belt pulley two 94 is provided with a connector 95 on the top, and two through holes penetrating into the interior are formed on the top of the second belt pulley two 94. The output end of the connector 95 passes through the two through holes and is combined with the two first belt pulleys two 93. When the connector 95 connects the first belt pulley two 93, the two first belt pulleys two 93 can rotate synchronously. When the rotating rod 66 of one drive mechanism 6 is rotated, one belt pulley one 91 is rotated. Under the action of the transmission belt one and the transmission belt two, one belt pulley one 91 drives one double-groove pulley 92 to rotate, and one double-groove pulley 92 drives one first belt pulley two 93 to rotate. Under the connection effect of the connector 95, the other belt pulley one 91, double-groove pulley 92 and first belt pulley two 93 are reversely driven to rotate, so that the other drive mechanism 6 is synchronously operated, thereby converting the valve type transmission mechanism 9 from the open state to the closed state.

[0041] Referring to Figure 8, the connector 95 comprises an outer fixed shell 951, the inner movable shell 952 is sleeved in the inner fixed shell 951, the inner wall of the inner movable shell 952 movably sleeves two intermeshing linkage gears 953, the bottom center of the two linkage gears 953 is fixedly connected with a polygonal bottom column 954, the two polygonal bottom columns 954 penetrate into the bottom of the inner movable shell 952, the top of the two belt pulleys two 93 is provided with a connecting groove matched with the shape and size of the connector 95, the top of the outer fixed shell 951 is provided with a threaded hole penetrating into the inside, the threaded hole is threadedly sleeved with a screw rod 955, the bottom end of the screw rod 955 is movably connected at the top of the inner movable shell 952, the screw rod 955 is vertically displaced under the influence of the threaded structure by rotating, thereby driving the inner movable shell 952 to vertically displace, and the two polygonal bottom columns 954 can be synchronously rotated through the meshing relationship of the two linkage gears 953, when the two polygonal bottom columns 954 are driven by the inner movable shell 952 and move downward to butt joint with the connecting grooves of the two first belt pulleys two 93, the connector 95 can drive the two belt pulleys two 93.

[0042] Referring to Figure 9, the front and back surfaces of the main disc frame 3 are provided with inner grooves 34, the front front leg 4a, the back front leg 4b, the front back leg 5a and the back back leg 5b are arranged in the two inner grooves 34 respectively, through the structure, the legs can be avoided to be outwardly protruded from the front and back surfaces of the main disc frame 3, thereby improving the overall appearance, and when the top of the legs is attached to the top of the inner grooves 34, the legs can be limited to be upwardly turned, so as to facilitate the front front leg 4a, the back front leg 4b, the front back leg 5a and the back back leg 5b to be adjusted to the same turning height, thereby achieving the turning angle adjusting effect.

[0043] Referring to Figures 3 and 10, the main disc frame 3 is provided with two limiting grooves 35 on both sides, one end of the two lever rods 63 away from the polygonal combination column 62 penetrates through the two limiting grooves 35 respectively, through the structure, the combination of the driving mechanism 6 and the combination mechanism 7 outside the main disc frame 3 is facilitated, the operation is more convenient, the translation distance of the lever rod 63 is limited, and the polygonal combination column 62 is prevented from being separated from the inner rotating cylinder 61.

[0044] The working principle of the present application: the electromagnet 22 in the probe 2 generates an alternating magnetic field when energized, which induces eddy currents on the surface and inside the measured material. The eddy currents interact with the alternating magnetic field, which in turn excites the magnetostrictive effect in the material, causing the magnetic particles in the material to vibrate and produce torsional guided waves. These guided waves propagate along the material and reflect when they encounter material interfaces. The reflected guided waves are received by the magnetostrictive torsional guided wave sensor 23 and converted into electrical signals. By analyzing and processing these electrical signals with the host computer 1, the thickness of the material can be calculated. The high sensitivity and selective reception of reflected waves by the magnetostrictive torsional guided wave sensor 23 allows accurate capture of these weak reflected guided waves, enabling non-contact and high-precision measurement. Furthermore, by de-energizing the electromagnet 22 after the instrument has completed its measurement, the probe 2 loses its magnetic attraction, preventing strong magnetic attraction between the instrument probe and the measured object, which would otherwise make it difficult to separate them.

[0045] However, in special measurement environments, such as when the measured object has a curved surface or is covered with a coating, the instrument needs to be adjusted to be perpendicular to the surface of the measured object and the distance between the instrument and the measured object needs to be adjusted to increase the penetration of the ultrasonic waves through the coating. By installing the angle and distance adjustment disc holder A on the probe 2, the instrument can be adjusted in angle and distance, which can be fixed and supported, thus avoiding measurement errors caused by poor instrument stability.

[0046] When using the angle and distance adjustment disc holder A, the two drive mechanisms 6 can be synchronized by closing the valve-type transmission mechanism 9, which allows synchronous operation. When the two drive mechanisms 6 and the four combination mechanisms 7 are fully assembled, controlling one drive mechanism 6 can make the four combination mechanisms 7 operate synchronously, and under the transmission effect of the four belt transmission mechanisms 8, the front legs 4a and 4b, as well as the rear legs 5a and 5b, can be synchronized to flip down and support, achieving height adjustment. When the valve-type transmission mechanism 9 is open, the two drive mechanisms 6 lose their linkage, and by controlling a single drive mechanism 6, the front legs 4a and 4b, or the rear legs 5a and 5b, can be controlled to flip, achieving left and right angle adjustment. When the valve-type transmission mechanism 9 is closed, disconnecting the drive mechanism 6 from one combination mechanism 7 can control the front legs 4a and 4b, or the rear legs 5a and 5b, to flip, achieving forward and backward adjustment. Thus, the instrument can be conveniently adjusted in height and angle.

[0047] The foregoing presents and describes the basic principles, main features and advantages of the present application. The present application is not limited to the above-described embodiments, which are merely illustrative of the principles of the present application. Various modifications and improvements can be made to the present application without departing from the spirit and scope of the present application, and such modifications and improvements are included within the scope of the present application. The scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A pulse electromagnetic electromagnetic ultrasonic thickness gauge, comprising a main machine (1), the bottom of the main machine (1) is electrically connected with a probe (2), characterized in that: The probe (2) comprises a protective shell (21), the inside of the protective shell (21) is provided with an electromagnet (22), a magnetostrictive torsional guided wave sensor (23) and a spiral coil (24), the electromagnet (22) is used for generating an alternating magnetic field, and the magnetostrictive torsional guided wave sensor (23) is used for receiving the torsional guided wave reflected by the measured object; The probe (2) is assembled with an elevation and angle adjusting disc rack A at the bottom, the elevation and angle adjusting disc rack A comprises a main body disc rack (3), the front surface of the main body disc rack (3) is provided with a front front leg (4a) and a rear front leg (5a), the back surface is provided with a back front leg (4b) and a back rear leg (5b), the inside of the main body disc rack (3) is provided with two driving mechanisms (6) and four combination mechanisms (7), the four combination mechanisms (7) are respectively driven and connected with the front front leg (4a), the back front leg (4b), the front rear leg (5a) and the back rear leg (5b) through four belt transmission mechanisms (8), the top of the main body disc rack (3) is provided with a valve type transmission mechanism (9), the two driving mechanisms (6) are driven and connected through the valve type transmission mechanism (9), the two driving mechanisms (6) are assembled and connected with the four combination mechanisms (7), and the two driving mechanisms (6), the four combination mechanisms (7) and the valve type transmission mechanism (9) are matched to control the separate operation and combined operation of the front front leg (4a), the back front leg (4b), the front rear leg (5a) and the back rear leg (5b).

2. The pulsed electromagnetic acoustic thickness gauge of claim 1, wherein: The top of the main body disc rack (3) is provided with an embedding groove (31) penetrating to the bottom, the shape and size of the embedding groove (31) are matched with the probe (2), the inside of the embedding groove (31) is provided with a placing space one (32) on both sides of the embedding groove (31), the inside of the main body disc rack (3) is provided with a placing space two (33) on the front and back surfaces of the embedding groove (31), the two driving mechanisms (6) and the four combination mechanisms (7) are respectively arranged in the two placing space ones (32), and the four belt transmission mechanisms (8) are respectively arranged in the two placing space twos (33).

3. The pulsed electromagnetic acoustic thickness gauge of claim 1, wherein: The front front leg (4a), the back front leg (4b), the front rear leg (5a) and the back rear leg (5b) are provided with casters at the turnover ends.

4. The pulsed electromagnetic acoustic thickness gauge of claim 1, wherein: The driving mechanism (6) comprises a rotating cylinder (61), a rotating rod (66), the rotating cylinder (61) is sleeved with two polygonal combination columns (62) inside, the two polygonal combination columns (62) extend to the front and rear ends of the rotating cylinder (61) and are longitudinally aligned with the input ends of the two combination mechanisms (7), the side walls of the two polygonal combination columns (62) are both provided with annular sliding grooves, and the two annular sliding grooves are both movably sleeved with a push rod (63), the rotating cylinder (61) is movably sleeved with a connecting frame one (67), the connecting frame one (67) is fixedly connected to the inner wall of the main disc frame (3), the rotating rod (66) penetrates through the top of the main disc frame (3) to the inside, the rotating rod (66) is connected with the valve type transmission mechanism (9), the bottom end of the rotating rod (66) is fixedly connected with a driving bevel gear one (65), the side wall of the driving bevel gear one (65) is engaged with a driven bevel gear one (64), and the driven bevel gear one (64) is fixedly connected to the side wall of the rotating cylinder (61).

5. A pulsed electromagnetic acoustic thickness gauge according to claim 4, wherein: The combination mechanism (7) comprises a fixed shell (71), the fixed shell (71) is movably sleeved with a worm (73), the side wall of the worm (73) is engaged with a worm wheel (72), the inner wall of the worm wheel (72) is connected with the belt transmission mechanism (8) through a connecting shaft (78), the side wall of the worm (73) is fixedly connected with a driven bevel gear two (74), the side wall of the driven bevel gear two (74) is engaged with a driving bevel gear two (75), the back of the fixed shell (71) is provided with a rotating hole penetrating to the inside, the rotating hole is movably sleeved with a reversing column (76), the reversing column (76) is fixedly connected with the inner wall of the driving bevel gear two (75), and the back of the reversing column (76) is provided with an end column (77) used for combination with the polygonal combination column (62).

6. A pulsed electromagnetic acoustic thickness gauge according to claim 5, wherein: The end column (77) is a polygon, and the one end of the polygonal combination column (62) is provided with a slot matched with the shape and size of the end column (77).

7. The pulsed electromagnetic acoustic thickness gauge of claim 4 wherein: The valve type transmission mechanism (9) comprises two belt pulleys one (91), two double-groove belt pulleys (92), a first belt pulley two (93) and a second belt pulley two (94), the two belt pulleys one (91) are fixedly connected with the side walls of the rotating rods (66) of the two driving mechanisms (6) respectively, the two double-groove belt pulleys (92) and the first belt pulley two (93) are movably sleeved on the top of the main disc frame (3), the belt pulley one (91) is drivingly connected with the double-groove belt pulley (92) through a transmission belt one, the double-groove belt pulley (92) is drivingly connected with the first belt pulley two (93) through a transmission belt two, the second belt pulley two (94) is provided with a connector (95) on the top, the top of the second belt pulley two (94) is provided with two through holes penetrating to the inside, and the output end of the connector (95) passes through the two through holes and is combined with the two first belt pulley two (93).

8. A pulsed electromagnetic acoustic thickness gauge according to claim 7, wherein: The connector (95) comprises an outer fixed shell (951), an inner movable shell (952) is sleeved in the outer fixed shell (951), two intermeshing linkage gears (953) are movably sleeved on the inner wall of the inner movable shell (952), a polygonal bottom column (954) is fixedly connected to the bottom center of each of the two linkage gears (953), the two polygonal bottom columns (954) penetrate into the bottom of the inner movable shell (952), each of the two first belt pulleys (93) is provided with a connecting groove matched with the shape and size of the connector (95) at the top, a threaded hole penetrating into the inside is formed in the top of the outer fixed shell (951), a screw rod (955) is threadedly sleeved in the threaded hole, and the bottom end of the screw rod (955) is movably connected to the top of the inner movable shell (952).

9. The pulsed electromagnetic acoustic thickness gauge of claim 1, wherein: The front legs (4a, 4b), the rear legs (5a, 5b) and the disc rack (3) are arranged in the inner recesses (34) on the front and back of the disc rack (3).

10. The pulsed electromagnetic acoustic thickness gauge of claim 4, wherein: Two limiting grooves (35) are formed on the two sides of the disc rack (3), and the two ends of the two shift rods (63) away from the polygonal combined column (62) penetrate through the two limiting grooves (35) respectively.

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