A Beckmann beam deflection instrument automatic acquisition device and measurement method

Abstract

The present application discloses an automatic data acquisition device and a measuring method for a Beckman beam deflection meter, including an auxiliary data acquisition vehicle, a Beckman beam, and an information monitoring system; the auxiliary data acquisition vehicle includes a frame, a bracket vertically slidably mounted on the frame, a height adjustment member for adjusting the height of the bracket, and a mounting frame; the end of the bracket is located outside the frame, and the Beckman beam is placed and supported on the end of the bracket; the information monitoring system includes a displacement sensor, a distance sensor, a microprocessing unit, a display unit, and a power supply unit; the displacement sensor is used to automatically and continuously collect rebound deflection value data of the road surface and subgrade; the distance sensor is used to automatically and continuously collect the distance between the standard vehicle and the measuring point; the microprocessing unit processes, displays, stores, and outputs the data collected by the displacement sensor and the distance sensor. The automatic data acquisition device and the measuring method for the Beckman beam deflection meter of the present application can collect data in real time, improve the efficiency of on-site detection, and make the measurement results more accurate and reliable.

Description

Technical Field

[0001] The present application relates to the field of road surface and subgrade deflection measurement, and in particular to an automatic data acquisition device and a measurement method for a Beckmann beam deflection meter. Background Art

[0002] The deflection value is the deformation of the roadbed and pavement before and after the load acts on the roadbed / pavement. If the deflection value is too large, the deformation will be greater, and the various layers of the road surface will be more likely to be damaged. As an important testing indicator, the deflection value reflects the overall strength quality of the road surface. Therefore, accurately measuring the deflection basin characteristic curve of the road surface is extremely important for understanding the changing law of road deflection, accurately evaluating the road surface quality, and objectively estimating the road surface life.

[0003] At present, the Beckman beam method is mainly used in highway construction to measure the rebound deflection of road surface and subgrade. The main equipment used in this method includes a standard vehicle and a Beckman beam. The Beckman beam sets a lever fulcrum at one-third of the overall length of the beam, dividing the beam into a longer front arm and a shorter rear arm (i.e., the ratio of the front and rear arms is 2:1). The front arm contacts the subgrade / pavement, and the rear arm is equipped with a dial indicator mechanical displacement meter.

[0004] When conducting a deflection test, the standard vehicle moves forward slowly, applying a load to the road surface to cause it to deform. The dial indicator continues to rotate forward as the road surface deformation increases. When the needle rotates to the maximum value, the initial reading is quickly read. The standard vehicle continues to move forward, and the needle of the dial indicator rotates in the opposite direction. After the needle rotates steadily, the final reading is read again.

[0005] However, when using the Beckman beam deflection instrument for testing, there are the following shortcomings: First, four people are required to complete the transportation of the Beckman beam arm, the installation and zeroing of the dial indicator, and the reading and recording of the test data, which consumes a lot of human resources, has high labor intensity, and low work efficiency; Second, the test process is greatly affected by human factors, and the accuracy of the test results cannot be well guaranteed. Summary of the invention

[0006] The purpose of this application is to provide a Beckman beam deflection meter automatic data acquisition device and measurement method, which can collect data in real time, improve on-site detection efficiency, and make the measurement results more accurate and reliable.

[0007] The above-mentioned purpose of the present application is achieved through the following technical solutions:

[0008] An automatic data collection device for a Beckmann beam deflection instrument comprises an auxiliary data collection vehicle, a Beckmann beam, and an information monitoring system; the auxiliary data collection vehicle comprises a frame with a transport platform, a bracket mounted on the frame in a vertical sliding manner, a height adjustment member driving the bracket to move back and forth in a height direction, and a mounting frame with a telescopic length arrangement; the end of the bracket is located outside the frame, and the Beckmann beam is placed and supported on the end of the bracket; the information monitoring system comprises a displacement sensor, a distance measuring sensor, a microprocessing unit, a display unit, and a power supply unit; the displacement sensor is mounted on the mounting frame and is used to automatically and continuously collect rebound deflection value data of a road surface and subgrade; the distance measuring sensor is mounted on the frame and is used to automatically and continuously collect the distance between a standard vehicle and a measuring point; the microprocessing unit processes, displays, stores, and outputs data collected by the displacement sensor and the distance measuring sensor; the display unit is used to output data processed by the microprocessing unit; and the power supply unit supplies power to connect the displacement sensor, the distance measuring sensor, the microprocessing unit, and the display unit.

[0009] By adopting the above technical solution, the Beckman beam can be directly placed on the end of the bracket and transferred to the next measuring point together with the auxiliary collection vehicle. It no longer needs to be carried by four workers, which effectively liberates labor and improves on-site detection efficiency. The information monitoring system can automatically and continuously collect data, and store the required collected data in the microprocessing unit in real time and completely, which makes up for the deficiency of the existing Beckman beam measurement method that the mechanical dial indicator can only detect the deflection value of a single point, ensures the real-time, multi-point continuity, integrity of the required data and eliminates the errors that may occur during manual reading.

[0010] The present application is further configured as follows: the frame body includes a rectangular frame, vertical poles arranged at the corners of the frame, and a transport platform, the vertical poles are vertically arranged, the tops of the vertical poles are fixedly connected to the frame, and the bottoms are fixedly connected to the transport platform, and self-locking universal wheels are installed at the bottom of the transport platform.

[0011] By adopting the above technical solution, the frame composed of the frame, poles and transportation platform provides an installation basis for the bracket and information monitoring system, so as to realize the Beckman beam transportation and real-time information collection functions.

[0012] The present application is further configured as follows: the bracket is mainly composed of two cross-distributed straight plates, and the end of the bracket is slidably matched with the vertical rod; the height adjustment member includes a screw vertically rotatably installed on the frame body and a force-applying member installed on the top of the screw, and the screw is threadedly connected to the bracket.

[0013] By adopting the above technical solution, the brackets are cross-arranged and slidably matched with the vertical rods of the frame, so that the brackets can provide support for the Beckmann beam and divide the interior of the frame into several triangular areas, effectively improving the stability of the frame. The bracket is driven by a lead screw to perform lifting and reciprocating motion, and the thread transmission is smooth and fast, making the Beckmann beam placed on the bracket more stable.

[0014] The present application is further configured as follows: the mounting frame includes a telescopic rod, a mounting seat for horizontally mounting the telescopic rod on a transport platform, and a clamping member connected to a movable end of the telescopic rod, the clamping member having an elastic clamping opening, and the displacement sensor is located in the elastic clamping opening.

[0015] The present application is further configured as follows: the movable end of the telescopic rod is vertically fixed with a connecting rod, the clamping member includes a sliding sleeve slidably mounted on the connecting rod, and a clamping plate horizontally fixed on the sliding sleeve, and the elastic clamp is arranged at the end of the clamping plate away from the sliding sleeve; the sliding sleeve is positioned on the connecting rod by a top screw.

[0016] By adopting the above technical solution, the displacement sensor is installed in the elastic clamp, the telescopic rod is used to achieve length adjustment, and the sliding sleeve and the connecting rod are used to achieve height adjustment, thereby realizing precise adjustment and installation of the displacement sensor.

[0017] The present application is further configured as follows: the mounting frames are configured as two groups, which are relatively arranged on both sides of the transport platform; and the telescopic rods of the two groups of mounting frames are staggered up and down.

[0018] By adopting the above technical solution, the auxiliary data collection vehicle can measure the Beckmann beams on both sides at the same time, and the measured data can be compared and corrected to improve the accuracy of the measurement.

[0019] The present application is further configured as follows: the information monitoring system also includes a temperature sensor for automatically and continuously collecting road surface temperature.

[0020] By adopting the above technical solution, the on-site temperature factor can be referred to when processing data to improve the accuracy of the data.

[0021] The present application is further configured as follows: the information monitoring system also includes an incremental encoder, which is signal-connected to the microprocessing unit and is used to set measurement point pile numbers, time intervals, and perform logical calculations on the data collected and processed by the microprocessing unit.

[0022] The above-mentioned second objective of the present application is achieved through the following technical solutions:

[0023] A measurement method of an automatic acquisition device for a Beckman beam deflection instrument, comprising the following process:

[0024] Check and maintain the condition of the standard vehicle, and align the rear wheel clearance of the standard vehicle to the position 3-5cm behind the measuring point;

[0025] Check the components and connection nodes in the information monitoring system;

[0026] Manually insert the Beckmann beam into the rear wheel gap of the standard vehicle, with the Beckmann beam in the same direction as the standard vehicle, and the Beckmann beam probe located 3-5cm in front of the center of the wheel gap;

[0027] Adjust the position of the positioning auxiliary collection vehicle, adjust the length and height of the mounting frame, and install the displacement sensor on the mounting frame so that the displacement sensor contacts the Beckmann beam. The entire information monitoring system is in the state of starting to collect data.

[0028] The commander issues a forward command, the standard vehicle moves forward, the information monitoring system first collects a maximum value, and then collects a final value after the standard vehicle drives out of the impact distance. The microprocessor unit processes and stores the measured data to complete the measurement of the measuring point;

[0029] Place the Beckmann beam on the end of the bracket, use the screw to lift the bracket to advance the Beckmann beam, and move it to the next measuring point with the auxiliary collection vehicle;

[0030] Repeat the above steps to continuously and completely detect the rebound deflection values ​​of the pavement and subgrade, and finally process the output data.

[0031] In summary, the present application has the following beneficial effects: by configuring an auxiliary data collection vehicle for the Beckman beam, the Beckman beam can be placed on the auxiliary data collection vehicle for synchronous transfer; an information monitoring system is provided on the auxiliary data collection vehicle to automatically and continuously collect data, and the required collected data is stored in a microprocessing unit in real time and completely, which makes up for the deficiency of the existing Beckman beam measurement method for determining the rebound deflection of the road surface subgrade using a mechanical dial indicator that can only detect a single-point deflection value, thereby ensuring the real-time, multi-point continuity, and integrity of the required data and eliminating the errors that may occur during manual reading. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 2 is a schematic diagram of the structure of the automatic acquisition device of the Beckman beam deflection instrument in the embodiment;

[0033] Figure 2 is a schematic diagram of the structure of the auxiliary collection vehicle in the embodiment;

[0034] Figure 3 is a schematic block diagram of an information monitoring system in an embodiment.

[0035] In the figure, 1. Auxiliary collection vehicle; 11. Transport platform; 12. Vertical pole; 13. Frame; 14. Universal wheel; 2. Beckmann beam; 3. Information monitoring system; 31. Displacement sensor; 32. Distance sensor; 33. Temperature sensor; 34. Microprocessor unit; 35. Incremental encoder; 36. Display unit; 37. Power supply unit; 4. Bracket; 5. Height adjustment member; 51. Lead screw; 52. Force member; 6. Mounting frame; 61. Telescopic rod; 611. Inner rod; 612. Outer tube; 62. Mounting seat; 63. Clamping member; 631. Sliding sleeve; 632. Clamping plate; 633. Elastic clamp; 64. Connecting rod. DETAILED DESCRIPTION

[0036] The present application is further described in detail below in conjunction with the accompanying drawings.

[0037] An automatic data acquisition device for a Beckmann beam deflection instrument, such as Figure 1 As shown, it includes an auxiliary collection vehicle 1, a Beckman beam 2 and an information monitoring system 3. The Beckman beam 2 can be placed on the auxiliary collection vehicle 1 and transferred through the auxiliary collection vehicle 1; the information monitoring system 3 is installed on the auxiliary collection vehicle 1 to measure and record the relevant data of the road deflection value in real time.

[0038] like Figure 1 , Figure 2 As shown, the auxiliary collection vehicle 1 includes a transport platform 11, and four rectangularly distributed upright poles 12 are vertically fixed to the top of the transport platform 11, and a rectangular frame 13 is horizontally fixed to the top of the upright poles 12. The frame 13, the upright poles 12 and the transport platform 11 constitute the frame of the auxiliary collection vehicle 1; self-locking universal wheels 14 are installed at the bottom of the transport platform 11 to facilitate the transfer or positioning of the frame.

[0039] The frame of the auxiliary collection vehicle 1 is horizontally arranged with a bracket 4 and a height adjustment member 5 for adjusting the height of the bracket 4. The outer shape of the bracket 4 is X-shaped, and is formed by splicing two cross-distributed straight plates; the cross-overlapping part of the bracket 4 is located at the center of the transport platform 11, and its end extends out of the frame to suspend and support the Beckman beam 2; the bracket 4 is provided with through holes at positions near its own ends, and the bracket 4 is sleeved on the vertical pole 12 through the through holes, so as to slide with the frame.

[0040] The height adjustment member 5 includes a lead screw 51 and a force member 52. The bottom of the lead screw 51 vertically passes through the overlapping portion of the bracket 4 and is rotatably mounted on the transport platform 11 by cooperating with a bearing seat fixed to the transport platform 11. A support plate is horizontally fixed to the frame 13 of the frame body. The top of the lead screw 51 passes through the support plate and rotatably cooperates with the support plate through a bearing. In this embodiment, the force member 52 is selected as a manual crank, which is fixed to the top of the lead screw 51.

[0041] The force applying member 52 drives the lead screw 51 to rotate, so that the bracket 4 performs lifting and reciprocating motion along the axis of the lead screw 51 . The end of the bracket 4 cooperates with the vertical rod 12 to guide and limit the bracket 4 , making the lifting process of the bracket 4 smoother.

[0042] The frame body is also provided with a length-adjustable mounting frame 6, which is located below the bracket 4. The mounting frame 6 comprises a telescopic rod 61, a mounting seat 62 for horizontally mounting the telescopic rod 61 in the frame body, and a clamping member 63 connected to the movable end of the telescopic rod 61.

[0043] Specifically, the mounting seat 62 is fixedly connected to the top of the transport platform 11, and the mounting seat 62 itself has a mounting hole horizontally opened; the telescopic rod 61 includes an inner rod 611 and an outer tube 612, and the outer tube 612 is inserted into the mounting hole and fixedly connected to the mounting seat 62; the inner rod 611 is inserted into the outer tube 612 and slidably cooperates with the outer tube 612. The cross section of the telescopic rod 61 is set to be rectangular, or a slider is fixedly connected to the circumference of the inner rod 611, and a slide groove is opened on the outer tube 612, and the slider and the slide groove are slidably limited to cooperate so that the inner rod 611 can slide smoothly in the outer tube 612.

[0044] A jackscrew is threadedly connected to the outer tube 612 , and the end of the jackscrew can pass through the tube wall and press against the inner rod 611 , thereby achieving the positioning of the inner rod 611 in the outer tube 612 .

[0045] The clamping member 63 is provided with an elastic clamping opening 633 for clamping and installing components in the information monitoring system 3 ; the clamping member 63 is connected to the end of the inner rod 611 away from the outer tube 612 , and the position of the components in the horizontal direction is adjusted through the telescopic rod 61 .

[0046] Furthermore, a connecting rod 64 is fixed vertically upward at the end of the inner rod 611 away from the outer tube 612; a sliding sleeve 631 is provided on the clamping member 63 to slide with the connecting rod 64, a clamping plate 632 is formed on the outer surface of the sliding sleeve 631 along the radial direction, and an elastic clamping opening 633 is provided at the end of the clamping plate 632; the sliding sleeve 631 slides on the connecting rod 64, driving the components installed on the clamping plate 632 to move synchronously, thereby realizing the position adjustment of the components in the vertical direction. The sliding sleeve 631 is also fixedly connected to the connecting rod 64 through a top screw.

[0047] The outer tube 612 of the telescopic rod 61 is completely located in the frame through the mounting seat 62, and the end of the outer tube 612 facing the inner rod 611 leaves a gap with the edge of the frame, so that after the inner rod 611 is retracted into the outer tube 612, the clamping member 63 is located in the gap, that is, the clamping member 63 is also located in the frame; this prevents the components installed on the clamping member 63 from being damaged by collision when the auxiliary collection vehicle 1 moves, thereby protecting the components.

[0048] The mounting frames 6 are provided in two groups in the frame body and are arranged opposite to each other on the transport platform 11 ; the telescopic rods 61 of the two groups of mounting frames 6 are coaxial and staggered up and down to avoid position interference.

[0049] like Figure 3 As shown, the information monitoring system 3 includes a displacement sensor 31 , a distance sensor 32 , a temperature sensor 33 , a microprocessor unit 34 , an incremental encoder 35 , a display unit 36 ​​and a power supply unit 37 .

[0050] The displacement sensor 31 is installed in the elastic clamping opening 633 of the clamping member 63, and is used to automatically and continuously collect the rebound deflection value data of the road surface and subgrade.

[0051] The distance measuring sensor 32 is installed on the frame and is used to automatically and continuously collect the distance between the standard vehicle and the measuring point.

[0052] The temperature sensor 33 is installed on the transport platform 11 and is used to automatically and continuously collect the road surface temperature.

[0053] The microprocessing unit 34 is installed on the frame and can be connected to the displacement sensor 31 , the distance sensor 32 , and the temperature sensor 33 through wireless communication to process, store and output the data collected by the displacement sensor 31 , the distance sensor 32 , and the temperature sensor 33 .

[0054] The incremental encoder 35 is installed on the frame and is connected to the microprocessing unit 34 by signal; the incremental encoder 35 performs measurement point number setting, time interval setting, and logic calculation on the data collected and processed by the microprocessing unit 34 .

[0055] The display unit 36 ​​is installed on the frame 13 of the frame body and connected to the microprocessor unit 34 for displaying the data processed by the microprocessor unit 34; the microprocessor unit 34 can be connected to a printer via a USB interface or a Bluetooth signal connection to print out the data.

[0056] The power supply unit 37 serves as a power supply and is connected to supply power to various components in the information monitoring system 3 .

[0057] The specific measurement process of the Beckman beam 2 deflection meter automatic acquisition device of this application is as follows:

[0058] Check and maintain the standard vehicle's condition and braking performance in good condition, and align the rear wheel clearance of the standard vehicle to a position about 3-5cm behind the measuring point;

[0059] Check whether each component and connection node in the information monitoring system 3 meets the requirements to be tested;

[0060] Manually insert Beckmann beam 2 into the rear wheel gap of the standard vehicle. The direction of Beckmann beam 2 is consistent with that of the standard vehicle. The beam arm must not touch the tire. The probe of Beckmann beam 2 is located 3-5 cm in front of the center of the wheel gap.

[0061] Adjust the position of the positioning auxiliary collection vehicle 1, adjust the length and height of the mounting frame 6, and install the displacement sensor 31 on the mounting frame 6 so that the displacement sensor 31 contacts the Beckman beam 2, and the entire information monitoring system 3 is in the state of starting to collect data;

[0062] The commander issues a forward command, the standard vehicle moves forward, the information monitoring system 3 first collects a maximum value, and then collects a final value after the standard vehicle drives out of the impact distance (more than 3 meters), and the microprocessing unit 34 processes and stores the measured data to complete the measurement of the measuring point;

[0063] The Beckmann beam 2 is placed and supported on the end of the bracket 4, and the bracket 4 is lifted by the lead screw 51 to advance the Beckmann beam 2 and move it to the next measuring point along with the auxiliary collection vehicle 1;

[0064] Repeat the above steps to continuously and completely detect the rebound deflection values ​​of the pavement and subgrade, and finally process the output data.

[0065] During the above measurement process, when the standard vehicle moves forward, the information monitoring system 3 starts to collect data, and stops collecting data when the distance measuring sensor 32 shows that the standard vehicle has traveled 5 meters out of the measuring point;

[0066] The collected data includes displacement sensor 31 synchronously collecting the rebound deflection value of the road surface subgrade, distance sensor 32 monitoring the distance between the measuring point and the standard vehicle, and temperature sensor 33 collecting the air temperature and road surface temperature during the test;

[0067] The acquisition process is continuous acquisition at a set time interval, such as 5ms or less;

[0068] The microprocessor unit 34 obtains the initial reading (maximum value) and the final reading (last value) from a series of data at the nth measuring point, calculates the measured value of the nth measuring point = (initial reading - final reading) * 2 through the incremental encoder 35, and displays the measured value through the display unit 36.

[0069] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. An automatic data acquisition device for a Beckman beam deflection instrument, characterized in that: It includes an auxiliary collection vehicle (1), a Beckman beam (2), and an information monitoring system (3); The auxiliary collection vehicle (1) comprises a frame having a transport platform (11), a bracket (4) vertically slidably mounted on the frame, a height adjustment member (5) for driving the bracket (4) to move back and forth in a height direction, and a mounting frame (6) with a telescopic length arrangement; The end of the bracket (4) is located outside the frame, and the Beckmann beam (2) is placed and supported on the end of the bracket (4); The frame body comprises a rectangular frame (13), a vertical pole (12) arranged at the corner of the frame (13), and a transport platform (11); the vertical pole (12) is arranged vertically, the top of which is fixedly connected to the frame (13), and the bottom of which is fixedly connected to the transport platform (11); and a self-locking universal wheel (14) is installed at the bottom of the transport platform (11); The information monitoring system (3) comprises a displacement sensor (31), a distance measuring sensor (32), a microprocessing unit (34), a display unit (36) and a power supply unit (37); The information monitoring system (3) further comprises a temperature sensor (33) for automatically and continuously collecting the road surface temperature; The displacement sensor (31) is mounted on a mounting frame (6) and is used to automatically and continuously collect rebound deflection value data of the road surface and subgrade; The distance measuring sensor (32) is installed on the frame and is used to automatically and continuously collect the distance between the standard vehicle and the measuring point; The microprocessing unit (34) processes, displays, stores and outputs the data collected by the displacement sensor (31) and the distance measuring sensor (32); The display unit (36) is used to output data processed by the microprocessing unit (34); The power supply unit (37) supplies power to connect the displacement sensor (31), the distance sensor (32), the microprocessor unit (34), and the display unit (36).

2. The Beckmann beam deflection meter automatic data acquisition device according to claim 1, characterized in that: The bracket (4) is mainly composed of two cross-distributed straight plates, and the end of the bracket (4) is slidably matched with the vertical rod (12); the height adjustment member (5) includes a lead screw (51) vertically rotatably mounted on the frame body and a force-applying member (52) mounted on the top of the lead screw (51), and the lead screw (51) is threadedly connected to the bracket (4).

3. The Beckman beam deflection meter automatic data acquisition device according to claim 1, characterized in that: The mounting frame (6) comprises a telescopic rod (61), a mounting seat (62) for horizontally mounting the telescopic rod (61) on a transport platform (11), and a clamping member (63) connected to a movable end of the telescopic rod (61), wherein the clamping member (63) has an elastic clamping opening (633), and the displacement sensor (31) is located in the elastic clamping opening (633).

4. The Beckman beam deflection meter automatic data acquisition device according to claim 3 is characterized in that: The movable end of the telescopic rod (61) is vertically fixedly connected to a connecting rod (64); the clamping member (63) comprises a sliding sleeve (631) slidably mounted on the connecting rod (64) and a clamping plate (632) horizontally fixedly connected to the sliding sleeve (631); the elastic clamping opening (633) is arranged at the end of the clamping plate (632) away from the sliding sleeve (631); the sliding sleeve (631) is positioned on the connecting rod (64) by a top screw.

5. The Beckman beam deflection meter automatic data collection device according to claim 4 is characterized in that: The mounting frames (6) are provided in two groups, which are arranged oppositely on both sides of the transport platform (11); the telescopic rods (61) of the two groups of mounting frames (6) are arranged in an up-and-down staggered manner.

6. The Beckman beam deflection meter automatic data collection device according to claim 1, characterized in that: The information monitoring system (3) further comprises an incremental encoder (35) which is connected to the microprocessing unit (34) by signal and is used to set the measuring point number, set the time interval and perform logic calculation on the data collected and processed by the microprocessing unit (34).

7. A measurement method using the Beckman beam deflection meter automatic data acquisition device according to any one of claims 1 to 6, characterized in that: The process includes: Check and maintain the condition of the standard vehicle, and align the rear wheel clearance of the standard vehicle to the position 3-5cm behind the measuring point; Check the components and connection nodes in the information monitoring system (3); Manually insert the Beckmann beam (2) into the wheel gap of the standard vehicle, with the Beckmann beam (2) and the standard vehicle in the same direction, and the Beckmann beam (2) probe located 3-5 cm in front of the wheel gap center; The position of the positioning auxiliary collection vehicle (1) is adjusted, the length and height of the mounting frame (6) are adjusted, and the displacement sensor (31) is mounted on the mounting frame (6) so that the displacement sensor (31) is in contact with the Beckmann beam (2), and the entire information monitoring system (3) is in an on-state for collecting data; The commander issues a forward command, the standard vehicle moves forward, the information monitoring system (3) first collects a maximum value, and then collects a final value after the standard vehicle drives out of the impact distance, and the microprocessing unit (34) processes and stores the measured data to complete the measurement of the measuring point; The Beckmann beam (2) is placed and supported on the end of the bracket (4), and the bracket (4) is lifted by the lead screw (51) to advance the Beckmann beam (2) and move it to the next measuring point along with the auxiliary collection vehicle (1); Repeat the above process to continuously and completely detect the rebound deflection values ​​of the pavement and subgrade, and finally process the output data.

8. The measuring method of the Beckman beam deflection meter automatic data acquisition device according to claim 7 is characterized in that: The collected data includes a displacement sensor (31) synchronously collecting the rebound deflection value of the road surface and subgrade, a distance sensor (32) monitoring the distance between the measuring point and the standard vehicle, and a temperature sensor (33) collecting the air temperature and road surface temperature during the test.

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