CN117664728A - A fully automatic testing system and testing method for concrete dynamic elastic modulus - Google Patents

Abstract

The invention relates to a fully automatic testing system for concrete dynamic elastic modulus. The system includes a fully automatic positioning box for concrete samples, a concrete dynamic elastic modulus tester and a data acquisition instrument that are connected together. The concrete sample fully automatic positioning box is equipped with infrared laser sensors at the top four corners, a sample loading device and a transducer moving device at the bottom, and a high-definition camera at the center of the top. The high-definition camera is connected to the data collector; the infrared laser sensor, The sample loading device, transducer moving device and high-definition camera are connected to the external operating handle through integrated cables; the concrete sample fully automatic positioning box is equipped with a plug connected to the socket; the infrared laser sensor and the sample loading device are respectively connected to the concrete dynamic elastic modulus tester Connected to the data collector. At the same time, the invention also discloses the testing method of the system. The invention effectively improves the testing efficiency and accuracy, ensures the effectiveness and objectivity of the test, saves manpower and reduces the test cost.

Description

A fully automatic testing system and testing method for dynamic elastic modulus of concrete

Technical field

The invention relates to the technical field of concrete dynamic elastic modulus testing, and in particular to a fully automatic testing system and testing method for concrete dynamic elastic modulus.

Background technique

At present, the dynamic elastic modulus test of concrete is mainly based on the resonance method. The dynamic elastic modulus tester is used to test the fundamental vibration frequency of concrete to calculate the dynamic elastic modulus value of concrete to measure its damage level and reflect different test environments. Deterioration characteristics below. According to the specification requirements of the "Standard for Test Methods of Long-term Performance and Durability of Ordinary Concrete", the general test process is: first measure the mass and size of the sample, enter the parameters, and then use a marker to mark the excitation transducer and receiver on the sample. For the position of the transducer, place the specimen at the center of the support body, place the excitation transducer and receiving transducer at the marked position, then start the test, and record the resonant frequency and concrete dynamic elastic modulus values. However, this method currently has many problems, mainly as follows:

(1) Before testing the dynamic elastic modulus of concrete, the sample needs to be weighed. However, when the sample size is large, it is extremely inconvenient to transport, and the sample is prone to bumps during the test, which affects the integrity of the sample, thereby affecting the integrity of the sample. Affect the subsequent test results; in addition, each sample needs to be weighed and the data recorded before the dynamic elastic modulus test, and then the dynamic elastic modulus tester can be connected to perform relevant tests, which adds to the dynamic elastic modulus test. workload;

(2) When testing the dynamic elastic modulus of concrete, in accordance with the requirements of the specification, the measuring rod of the excitation transducer needs to be gently pressed on 1/2 of the center line of the long side of the specimen, and the measuring rod of the receiving transducer should be lightly pressed. Gently press on the long side of the specimen at a distance of 5 mm from the end surface of the midline. Therefore, the location of the excitation transducer and the receiving transducer is an important task. Generally, the ruler method is used for mark positioning, but this wastes time and the test results are not accurate enough. The error in the test results is often caused by the deviation in the position of the excitation transducer and the receiving transducer measuring rod, and the operation steps are more cumbersome. , generally requires at least two people to work together, which is a waste of manpower;

(3) After the dynamic elastic modulus test of each group of concrete specimens, the resonance frequency and dynamic elastic modulus data must be recorded first, and then the next group of specimens can be tested. When the number of samples is large, recording the data first and then replacing the samples wastes time and affects the continuity of the test;

(4) After the concrete sample is eroded, it is necessary to record the appearance deterioration characteristics and test the dynamic elastic modulus. However, when the above recording and testing are performed on the same group of concrete samples, they generally need to be carried out separately, which increases the number of test steps and increases the workload.

Contents of the invention

The technical problem to be solved by the present invention is to provide a fully automatic testing system for concrete dynamic elastic modulus that improves testing efficiency and accuracy, saves manpower, and reduces testing costs.

Another technical problem to be solved by the present invention is to provide a fully automatic testing method for the dynamic elastic modulus of concrete.

In order to solve the above problems, the present invention provides a fully automatic concrete dynamic elastic modulus testing system, which is characterized in that: the system includes a concrete sample fully automatic positioning box and a concrete dynamic elastic modulus test box connected together through a data transmission line. instrument and data acquisition instrument; the top four corners of the fully automatic concrete sample positioning box are equipped with infrared laser sensors, the bottom is equipped with a sample loading device and a transducer moving device, and a high-definition camera is installed at the center of the top. The high-definition camera is connected to The data collector is connected; the infrared laser sensor, the sample loading device, the transducer moving device and the high-definition camera are connected to an external operating handle through an integrated cable; the concrete sample fully automatic positioning box is equipped with A plug connected to the socket; the infrared laser sensor and the sample loading device are respectively connected to the concrete dynamic elastic modulus tester and the data acquisition instrument.

The fully automatic positioning box for concrete samples is a rectangular open structure with a length of 60 cm, a width of 30 cm, and a height of 20 cm. The bottom is equipped with a stainless steel plate, and the other surfaces are steel columns, which are welded and connected.

The sample loading device includes a chute I located at the bottom of the fully automatic positioning box for concrete samples, a slide rail I and a motor I embedded in the chute I, and a sample placement plate placed on the base support plate; The slide rail I is provided with a slide block I, one end of which is connected to the motor I through a coupling I; the slide block I is connected to the base support plate, and the base support plate is connected to the sample placement plate. Two sets of pressure sensors are provided symmetrically; the motor I and the pressure sensor are electrically connected to the operating handle respectively; the pressure sensor is connected to the concrete dynamic elastic modulus tester and the data acquisition instrument respectively; The sample plate is used to place concrete samples.

Two groups of pressure sensors are arranged at four corners of the base support plate.

The base support plate is in an inverted T shape.

The upper part of the slider I is connected to the base support plate through bolts, and the lower part is threadedly connected to the slide rail I.

The transducer moving device includes a chute II located at the bottom of the concrete sample automatic positioning box, a slide rail II and a motor II embedded in the chute II, as well as an excitation transducer and a receiving transducer. The slide rail II is provided with a slide block II and a slide block III respectively, and one end is connected to the motor II through a coupling II; the excitation transducer is provided in the slide block II; The receiving transducer is provided in the slider III; pulleys are respectively provided at the bottoms of the excitation transducer and the receiving transducer; the motor II is electrically connected to the operating handle.

The slider II and the slider III are both provided with grooves, and the pulleys are provided in the grooves.

The lower parts of the slider II and the slider III are both threadedly connected to the slide rail II.

The fully automatic testing method of concrete dynamic elastic modulus using the above system includes the following steps:

①Assemble and connect the fully automatic positioning box for concrete specimens, the concrete dynamic elastic modulus tester and the data acquisition instrument through the data transmission line; then connect the plugs and sockets, energize and debug;

②Use the operating handle to control the rotation of the motor I, so that the slider I in the chute I drives the base support plate and the sample plate that are integrated with it, and move out the concrete sample automatic positioning box along the spiral slide rail I, and then Place the concrete sample on the sample plate, use the operating handle to move the slider I, and move the sample plate and concrete sample into the concrete sample automatic positioning box;

③ Press the weighing key and measuring key in the operating handle, use the pressure sensor to weigh the concrete sample; use the infrared laser sensor to scan the length, height and width of the concrete sample, and then transmit the mass and size data to the concrete dynamic elastic modulus tester;

④ Press the marking button in the operating handle, and use four infrared laser sensors to mark and position 1/2 of the center line of the long side of the front surface of the concrete sample and 5 mm away from the end face to form infrared laser positioning marking points I and The infrared laser locates the marking point II; then starts the motor II, and uses the operating handle to control the slider II and slider III along the spiral linear slide rail II to drive the excitation transducer placed in the grooves of the slider II and slider III. Move the excitation transducer and the receiving transducer to the infrared laser positioning mark point I and the infrared laser positioning mark point II respectively, and then manually move the pulleys at the bottom of the excitation transducer and the receiving transducer to connect the excitation transducer and the receiving transducer. The measuring rod of the transducer is gently pressed on the infrared laser positioning mark point I and the infrared laser positioning mark point II on the surface of the concrete sample;

⑤ Start the concrete dynamic elastic modulus tester and conduct the dynamic elastic modulus test on the concrete sample; after the test is completed, manually move the pulleys at the bottom of the excitation transducer and the receiving transducer, and connect the excitation transducer and the receiving transducer. The measuring rod of the transducer moves away from the surface of the concrete specimen, and the operating handle is used to move the slider II and slider III to drive the excitation transducer and the receiving transducer back to their original positions;

⑥ Press the photo button in the operating handle to take photos of the concrete sample and record its appearance deterioration characteristics; after taking the photo, use the operating handle to operate the slider I to drive the sample plate and concrete sample out of the concrete sample to fully automatically position it box to replace the next set of specimens;

⑦Use the data acquisition instrument to collect and record the test data of the quality, size, resonance frequency, dynamic elastic modulus and appearance deterioration characteristic photos of the concrete specimen in real time for subsequent test analysis.

Compared with the prior art, the present invention has the following advantages:

1. The present invention sets up a fully automatic positioning box for concrete samples to realize the synchronization of concrete sample mass weighing and dynamic elastic modulus testing. At the same time, the sample quality parameters can be fed back to the dynamic elastic modulus tester in real time, reducing the number of Test workload.

2. The present invention is equipped with a sample loading device to facilitate the movement of samples into and out of the fully automatic positioning box for concrete samples, reducing labor consumption and improving test efficiency.

3. The present invention is equipped with an infrared laser sensor to achieve accurate measurement of the size of the concrete sample and real-time feedback to the concrete dynamic elastic modulus tester. At the same time, the excitation transducer and the receiving transducer are marked according to the specification requirements. The position of the rod makes it easy to operate the operating handle to position the excitation transducer and the receiving transducer to the designated position, which improves the positioning speed and accuracy of the excitation transducer and the receiving transducer, and ensures the effectiveness and accuracy of the test. objectivity of results.

4. The present invention is equipped with a high-definition camera to take pictures and record the apparent characteristics of the concrete sample after different erosion effects, forming a corresponding relationship with the internal damage characteristics reflected by the dynamic elastic modulus, so as to facilitate the exploration of the relationship between the internal and external damage characteristics of the sample. connect.

5. The present invention sets up a data acquisition instrument to collect and record the quality, size, photos, resonance frequency and dynamic elastic modulus value of the concrete sample in real time, which reduces the test steps, improves the accuracy of test measurement, further saves manpower and facilitates single-use testing. Manual operation saves costs.

6. Through the combination of pressure sensor, infrared laser sensor, dynamic elastic modulus tester and high-definition camera, the present invention can effectively complete the testing and recording of concrete quality, size, dynamic elastic modulus and appearance deterioration characteristics, and improve the test results. accuracy while reducing dependence on manpower and time.

Description of drawings

The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

Figure 1 is a schematic structural diagram of the present invention.

Figure 2 is a schematic diagram before setting out according to the present invention.

Figure 3 is a schematic diagram of the present invention after setting out.

Figure 4 is a schematic diagram of the sample loading device in the present invention.

Figure 5 is a schematic diagram of the combined device of slide block I, slide rail I, chute I, coupling I and motor I in the present invention.

Figure 6 is a structural diagram of the slider I in the present invention.

Figure 7 is a schematic diagram of the transducer moving device in the present invention.

Figure 8 is a schematic diagram of the combined device of the excitation transducer and slider II in the present invention.

Figure 9 is a schematic diagram of the pulley in the present invention.

In the picture: 1—Concrete sample fully automatic positioning box; 2—Infrared laser sensor; 3—Sample loading device; 4—Transducer moving device; 5—High-definition camera; 6—Operating handle; 7—Plug; 8—Socket ; 9—Data transmission line; 10—Concrete dynamic elastic modulus tester; 11—Data acquisition instrument; 12—Concrete sample; 13—Infrared laser positioning marking point I; 14—Infrared laser positioning marking point II; 15—Set the sample ; 16—Pressure sensor; 17—Base support plate; 18—Chute I; 19—Slide rail I; 20—Slider I; 21—Bolt; 22—Coupling I; 23—Motor I; 24—Slide Slot II; 25—slide rail II; 26—slider II; 27—slider III; 28—coupling II; 29—motor II; 30—excitation transducer; 31—receiving transducer; 32— Pulley; 33—stainless steel plate; 34—reinforced steel column.

Detailed ways

As shown in Figures 1 to 9, a fully automatic concrete dynamic elastic modulus testing system includes a concrete sample fully automatic positioning box 1, a concrete dynamic elastic modulus tester 10 and data connected together through a data transmission line 9 Collection instrument 11. The top four corners of the fully automatic concrete sample positioning box 1 are equipped with infrared laser sensors 2, and the bottom is equipped with a sample loading device 3 and a transducer moving device 4 respectively. A high-definition camera 5 is installed at the center of the top. The high-definition camera 5 is used for data collection. The instrument 11 is connected; the infrared laser sensor 2, the sample loading device 3, the transducer moving device 4 and the high-definition camera 5 are externally connected to the operating handle 6 through the integrated cable; the concrete sample fully automatic positioning box 1 is provided with a plug 7 connected to the socket 8; The infrared laser sensor 2 and the sample loading device 3 are connected to the concrete dynamic elastic modulus tester 10 and the data acquisition instrument 11 respectively.

Among them: the concrete sample fully automatic positioning box 1 is a rectangular open structure with a length of 60 cm, a width of 30 cm, and a height of 20 cm. It is equipped with a stainless steel plate 33 at the bottom, and the other surfaces are steel columns 34 connected by welding.

The operating handle 6 is equipped with buttons for moving left, moving right, weighing, measuring, marking, and taking photos, etc., and controls the infrared laser sensor 2, the sample loading device 3, the transducer moving device 4, and the high-definition camera 5.

The infrared laser sensor 2 sends laser beams from different angles to each surface of the concrete sample 12, the laser beam is reflected to the sensor, the reflection time is calculated to determine the sample size (the reflection speed is usually about one-third of the speed of light), and the size data is fed back to the dynamic elastic modulus tester 10 and the data acquisition instrument 11. According to the size data of the tested concrete sample 12, the infrared laser sensor 2 is controlled by the operating handle 6 to send an infrared laser beam to scan and measure the front surface of the concrete sample, and position it at 1/2 of the center line of the long side of the sample and the center line of the long side. At a distance of 5 mm from the end face, an infrared laser positioning mark point I13 and an infrared laser positioning mark point II14 are formed.

The high-definition camera 5 is arranged in the center directly above the concrete sample automatic positioning box 1, is arranged parallel to the concrete sample 12, and is connected to the data collector 11 to take pictures and record the damage or damage to the surface of the sample after being subjected to erosion. degree.

The concrete dynamic elastic modulus tester 10 is connected to the concrete sample fully automatic positioning box 1 and the data acquisition instrument 11, receives the concrete quality and size data, transmits the concrete resonance frequency and dynamic elastic modulus data, and reflects the sample after being subjected to erosion. The extent of internal damage or damage.

The data collector 11 is connected to the concrete sample fully automatic positioning box 1 and the dynamic elastic modulus tester 10 to collect and record the quality, size, photos, resonance frequency and dynamic elastic modulus data of the concrete sample 12 in real time. The data collector 11 is provided with USB and type-C data transmission interfaces for subsequent copying and analysis of test data.

The sample loading device 3 includes a chute I18 located at the bottom of the concrete sample automatic positioning box 1, a slide rail I19 and a motor I23 embedded in the chute I18, and a sample placement plate 15 placed on the base support plate 17; the slide rail There is a slider I20 on I19, one end of which is connected to the motor I23 through a coupling I22; the slider I20 is connected to the base support plate 17, and two sets of pressure sensors 16 are symmetrically provided between the base support plate 17 and the sample plate 15. ; The motor I23 and the pressure sensor 16 are electrically connected to the operating handle 6 respectively; the pressure sensor 16 is connected to the concrete dynamic elastic modulus tester 10 and the data acquisition instrument 11 respectively; the sample plate 15 is placed to place the concrete sample 12. The operating handle 6 is used to control the slider I20 to drive the sample plate 15 and the concrete sample 12 to move in and out. At the same time, the operating handle 6 is used to control the pressure sensor 16 to weigh the mass of the concrete sample 12, and the mass data is input into the dynamic elastic modulus tester. 10 and data collector 11. When the motor I23 is used to move the slider I20, the slide rail I19 rotates clockwise to move to the right, and rotates counterclockwise to move to the left.

Two sets of pressure sensors 16 are arranged at the four corners of the base support plate 17 . The pressure sensor 16 is a strain gauge pressure sensor made of metal sheet. When bearing a load, slight deformation will occur, which will be converted into a voltage signal, converted into sample mass data and transmitted to the dynamic elastic modulus tester 10 and data acquisition instrument 11.

The base support plate 17 is in an inverted T shape, made of 316 stainless steel, with a length of 54 cm, a width of 15 cm, a beam thickness of 3 cm, and a base thickness of 2 cm.

The upper part of the slider I20 is connected to the base support plate 17 through bolts 21, and the lower part is threadedly connected to the slide rail I19. The slider I20 is made of 316 stainless steel and has a rectangular parallelepiped structure with a length of 15 cm, a width of 10 cm, and a height of 10 cm. The internal thread of the slider I20 is a V-shaped thread with a pitch of 1.5 mm, a thread angle of 60 degrees, an inner diameter of 14 mm, an outer diameter of 15 mm, and a thread number of 1.

The sample plate 15 is made of foam plastic and has a rectangular parallelepiped structure, with a length of 50 cm, a width of 15 cm, and a thickness of 5 cm.

Slide rail Ⅰ19 is external thread, with spiral linear texture on the surface, V-shaped thread, pitch 1.5 mm, thread angle 60 degrees, inner diameter 14 mm, outer diameter 15 mm, and the number of threads is 1.

The transducer moving device 4 includes a chute II 24 located at the bottom of the concrete sample automatic positioning box 1, a slide rail II 25 and a motor II 29 embedded in the chute II 24, as well as an excitation transducer 30 and a receiving transducer 31; The slide rail II 25 is provided with a slide block II 26 and a slide block III 27 respectively, one end of which is connected to the motor II 29 through a coupling II 28; the slide block II 26 is provided with an excitation transducer 30; the slide block III 27 is provided with a receiving transducer 31 ; The bottoms of the excitation transducer 30 and the receiving transducer 31 are respectively provided with pulleys 32; the motor II 29 is electrically connected to the operating handle 6. Use the operating handle 6 to control the motor II29, move the slider II26 and the slider III27, and drive the excitation transducer 30 and the receiving transducer 31 to move to the infrared laser positioning mark point I13 and the infrared laser positioning mark point II14 on the surface of the concrete sample 12 At , manually move the pulley 32 at the bottom of the transducer so that the measuring rods of the excitation transducer 30 and the receiving transducer 31 are gently pressed against the surface of the concrete sample 12.

Slider II26 and Slider III27 are made of 316 stainless steel, with a length of 15 cm, a width of 10 cm, and a height of 10cm. The upper parts are equipped with rectangular grooves (length of 15 cm, width of 3 cm, and depth of 5 cm). A pulley 32 is provided in the groove.

The lower parts of slide block II 26 and slide block III 27 are threadedly connected to slide rail II 25.

The bottoms of the excitation transducer 30 and the receiving transducer 31 are placed in the groove, and the lower part is provided with a V-shaped internal thread with a pitch of 1.5 mm, a thread angle of 60 degrees, an inner diameter of 14 mm, an outer diameter of 15 mm, and a thread number of 1.

The excitation transducer 30 and the receiving transducer 31 are provided with pulleys 32 at the bottom, which are respectively placed in the upper grooves of the slider II 26 and the slider III 27 for manually moving the excitation transducer 30 and the receiving transducer 31 closer to each other. Or away from the surface of the concrete specimen 12, where the diameter of the pulley 32 is 2 cm.

The excitation transducer 30 and the receiving transducer 31 are auxiliary equipment of the concrete dynamic elastic modulus tester 10. The concrete dynamic elastic modulus tester 10 adopts the DT-16 type dynamometer produced by Tianjin Construction Instrument Factory.

The system is used to conduct a fully automatic testing method of concrete dynamic elastic modulus, including the following steps:

① Through the data transmission line 9, assemble and connect the concrete sample fully automatic positioning box 1, the concrete dynamic elastic modulus tester 10 and the data acquisition instrument 11; then connect the plug 7 and the socket 8, power on and debug;

② Use the operating handle 6 to control the rotation of the motor I23, so that the slider I20 in the chute I18 drives the base support plate 17 and the sample plate 15 that are fixed integrally with it, and the concrete sample is moved out along the spiral linear slide rail I19 for fully automatic positioning. Box 1, then place the concrete sample 12 on the sample plate 15, use the operating handle 6 to move the slider I20, and drive the sample plate 15 and the concrete sample 12 to move into the concrete sample automatic positioning box 1;

③ Press the weighing key and measuring key in the operating handle 6, use the pressure sensor 16 to weigh the concrete sample 12; use the infrared laser sensor 2 to scan the length, height and width of the concrete sample 12, and then The mass and dimensional data are transmitted to the concrete dynamic elastic modulus tester 10;

④ Press the marking button in the operating handle 6, and use four infrared laser sensors 2 to mark and position 1/2 of the long side center line of the front surface of the concrete sample 12 and 5 mm away from the end surface to form an infrared laser positioning mark. Point I13 and infrared laser positioning mark point II14; then start the motor II29, use the operating handle 6 to control the slider II26 and the slider III27 along the spiral linear slide rail II25, driving the slider placed in the groove of the slider II26 and the slider III27 The excitation transducer 30 and the receiving transducer 31 are moved to the infrared laser positioning mark point I13 and the infrared laser positioning mark point II14 respectively, and then the pulley 32 at the bottom of the excitation transducer 30 and the receiving transducer 31 is manually moved. , gently press the measuring rods of the excitation transducer 30 and the receiving transducer 31 on the infrared laser positioning mark point I13 and the infrared laser positioning mark point II14 on the surface of the concrete sample 12;

⑤ Start the concrete dynamic elastic modulus tester 10 to test the dynamic elastic modulus of the concrete sample 12; after the test is completed, manually move the pulley 32 at the bottom of the excitation transducer 30 and the receiving transducer 31 to change the excitation to The measuring rods of the transducer 30 and the receiving transducer 31 move away from the surface of the concrete sample 12, and the operating handle 6 is used to move the slider II 26 and the slider III 27 to drive the excitation transducer 30 and the receiving transducer 31 to return to their original positions;

⑥ Press the photo button in the operating handle 6 to take photos of the concrete sample 12 and record its appearance deterioration characteristics; after taking the photo, use the operating handle 6 to operate the slider I20 to drive the sample plate 15 and the concrete sample 12 out of the concrete Fully automatic sample positioning box 1, replacing the next set of samples;

⑦Use the data collector 11 to collect and record the test data of the mass, size, resonance frequency, dynamic elastic modulus and appearance deterioration characteristic photos of the concrete sample 12 in real time, so as to facilitate copying to U disk, hard disk, etc. for subsequent test analysis.

The above contents are only for illustrating the technical ideas of the present invention and cannot be used to limit the protection scope of the present invention. Any changes made based on the technical ideas proposed by the present invention and based on the technical solutions shall fall within the scope of the claims of the present invention. within the scope of protection.

Claims (10)

1. A full-automatic test system for the dynamic elastic modulus of concrete is characterized in that: the system comprises a full-automatic concrete sample positioning box (1), a concrete dynamic elastic modulus tester (10) and a data acquisition instrument (11) which are connected together through a data transmission line (9); the top four corners of the full-automatic concrete sample positioning box (1) are provided with infrared laser sensors (2), the bottom is respectively provided with a sample loading device (3) and a transducer moving device (4), the center of the top is provided with a high-definition camera (5), and the high-definition camera (5) is connected with the data acquisition instrument (11); the infrared laser sensor (2), the sample loading device (3), the transducer moving device (4) and the high-definition camera (5) are externally connected with an operation handle (6) through an integrated cable; the full-automatic positioning box (1) for the concrete sample is provided with a plug (7) connected with a socket (8); the infrared laser sensor (2) and the sample loading device (3) are respectively connected with the concrete dynamic elastic modulus tester (10) and the data acquisition instrument (11).

2. A fully automatic test system for the dynamic elastic modulus of concrete according to claim 1, wherein: the full-automatic positioning box (1) for the concrete sample is of a cuboid open structure, the length is 60 cm, the width is 30 cm, the height is 20 cm, the bottom is provided with a stainless steel plate (33), and other surfaces are steel bar upright posts (34) and are welded and connected.

3. A fully automatic test system for the dynamic elastic modulus of concrete according to claim 1, wherein: the sample loading device (3) comprises a chute I (18) arranged at the bottom of the full-automatic concrete sample positioning box (1), a sliding rail I (19) and a motor I (23) which are embedded in the chute I (18), and a sample placing plate (15) arranged on a base supporting plate (17); a sliding block I (20) is arranged on the sliding rail I (19), and one end of the sliding block I is connected with the motor I (23) through a coupling I (22); the sliding block I (20) is connected with the base supporting plate (17), and two groups of pressure sensors (16) are symmetrically arranged between the base supporting plate (17) and the template (15); the motor I (23) and the pressure sensor (16) are respectively electrically connected with the operating handle (6); the pressure sensor (16) is respectively connected with the concrete dynamic elastic modulus tester (10) and the data acquisition instrument (11); the setting plate (15) is used for setting a concrete sample (12).

4. A fully automatic test system for the dynamic elastic modulus of concrete according to claim 3, wherein: two groups of pressure sensors (16) are arranged at four corners on the base support plate (17).

5. A fully automatic test system for the dynamic elastic modulus of concrete according to claim 3 or 4, wherein: the base support plate (17) is of an inverted T shape.

6. A fully automatic test system for the dynamic elastic modulus of concrete according to claim 3, wherein: the upper part of the sliding block I (20) is connected with the base supporting plate (17) through a bolt (21), and the lower part of the sliding block I is in threaded connection with the sliding rail I (19).

7. A fully automatic test system for the dynamic elastic modulus of concrete according to claim 1, wherein: the transducer moving device (4) comprises a chute II (24) arranged at the bottom of the concrete sample full-automatic positioning box (1), a sliding rail II (25) and a motor II (29) which are embedded in the chute II (24), and an excitation transducer (30) and a receiving transducer (31); the sliding rail II (25) is respectively provided with a sliding block II (26) and a sliding block III (27), and one end of the sliding rail II is connected with the motor II (29) through a coupling II (28); the exciting transducer (30) is arranged in the sliding block II (26); the receiving transducer (31) is arranged in the sliding block III (27); pulleys (32) are respectively arranged at the bottoms of the excitation transducer (30) and the receiving transducer (31); the motor II (29) is electrically connected with the operating handle (6).

8. The fully automatic test system for dynamic elastic modulus of concrete according to claim 7, wherein: the sliding block II (26) and the sliding block III (27) are respectively provided with a groove, and the pulleys (32) are arranged in the grooves.

9. The fully automatic test system for dynamic elastic modulus of concrete according to claim 7, wherein: the lower parts of the sliding block II (26) and the sliding block III (27) are in threaded connection with the sliding rail II (25).

10. Full-automatic testing method for dynamic elastic modulus of concrete by adopting the system according to one of claims 1-9, comprising the following steps:

(1) the full-automatic positioning box (1) for the concrete sample, the dynamic elastic modulus tester (10) for the concrete and the data acquisition instrument (11) are assembled and connected through the data transmission line (9); then the plug (7) and the socket (8) are connected, and the power is on and the debugging is carried out;

(2) the operation handle (6) is utilized to control the motor I (23) to rotate, so that the sliding block I (20) in the sliding chute I (18) drives the base supporting plate (17) and the sample placing plate (15) which are fixed with the sliding block I into a whole, the concrete sample full-automatic positioning box (1) is moved out along the spiral linear sliding rail I (19), then the concrete sample (12) is placed on the sample placing plate (15), and the sliding block I (20) is moved by utilizing the operation handle (6) to drive the sample placing plate (15) and the concrete sample (12) to move into the concrete sample full-automatic positioning box (1);

(3) pressing a weighing key and a measuring key in the operating handle (6), and weighing the concrete sample (12) by using the pressure sensor (16); the method comprises the steps of performing size scanning on the length, the height and the width of a concrete sample (12) by using an infrared laser sensor (2), and then transmitting quality and size data to a concrete dynamic elastic modulus tester (10);

(4) pressing a marking key in an operating handle (6), and performing marking and positioning at 1/2 of the center line of the long side surface of the front surface of the concrete sample (12) and 5/mm from the end surface by utilizing four infrared laser sensors (2) to form an infrared laser positioning marking point I (13) and an infrared laser positioning marking point II (14); then a motor II (29) is started, an operating handle (6) is used for operating a sliding block II (26) and a sliding block III (27) along a spiral linear sliding rail II (25), an excitation transducer (30) and a receiving transducer (31) which are arranged in grooves of the sliding block II (26) and the sliding block III (27) are driven to move to an infrared laser positioning mark point I (13) and an infrared laser positioning mark point II (14) respectively, then a pulley (32) at the bottom of the excitation transducer (30) and the receiving transducer (31) is manually moved, and measuring rods of the excitation transducer (30) and the receiving transducer (31) are lightly pressed on the infrared laser positioning mark point I (13) and the infrared laser positioning mark point II (14) on the surface of a concrete sample (12);

(5) starting a concrete dynamic elastic modulus tester (10) to test the dynamic elastic modulus of a concrete sample (12); after the test is finished, manually moving pulleys (32) at the bottoms of the excitation transducer (30) and the receiving transducer (31), moving measuring rods of the excitation transducer (30) and the receiving transducer (31) away from the surface of the concrete sample (12), and moving a sliding block II (26) and a sliding block III (27) by using an operating handle (6) to drive the excitation transducer (30) and the receiving transducer (31) to return to the original positions;

(6) pressing a photographing key in the operating handle (6) to photograph the concrete sample (12), and recording the appearance degradation characteristics of the concrete sample; after photographing, the operation handle (6) is used for operating the sliding block I (20) to drive the sample placing plate (15) and the concrete sample (12) to move out of the full-automatic concrete sample positioning box (1) so as to replace the next group of samples;

(7) and collecting and recording test data of quality, size, resonance frequency, dynamic elastic modulus and appearance degradation characteristic pictures of the concrete sample (12) in real time by using a data acquisition instrument (11) for subsequent test analysis.