CN110274563A - Non-metal board calibrator error-detecting calibrating installation and method - Google Patents

Abstract

The invention discloses an error detection and calibration device and method for a non-metal plate thickness gauge. Including standard block mechanism, non-metallic plate thickness gauge detection mechanism and probe automatic scanning mechanism, the probe automatic scanning mechanism is installed on the non-metallic plate thickness gauge detection mechanism; the storage plate is located directly under the scanning plate, and the two ends of the storage plate pass through The grating ruler is vertically slid and installed on the support frame of the device; the middle of the upper surface of the storage plate is a storage area and steel bars are installed, and the lower surface of the scanning plate has a foil strain gauge; the external thread of the ball screw is equipped with a ball screw nut seat, and the ball screw The nut seat is embedded on the guide rail, and the bottom end of the ball screw nut seat is installed with a scanning probe through a telescopic rod. The invention can better and truly inspect the detection data of the actual non-metallic plate thickness gauge, better inspect the pass rate of the non-metallic plate, and reduce the error of the air medium layer in the inspection process compared with the actual non-metallic plate , can be used as a self-inspection device for inspection agencies and instrument use verification units.

Description

Device and method for error detection and calibration of non-metal plate thickness gauge

technical field

The invention relates to the field of error detection and analysis and measurement calibration in the quality inspection and inspection process of construction engineering products, in particular to an error detection and calibration device and method for a non-metallic plate thickness gauge.

Background technique

With the development of modern social buildings, safety assurance such as non-metallic plate thickness detection has become people’s primary consideration. Therefore, non-metallic plate thickness gauges on the market are used in the process of measuring the thickness of non-metallic plates. It needs to be fully guaranteed to ensure the absolute safety of the project quality and avoid safety problems caused by non-metallic plates due to substandard quality. In the process of testing and inspecting the quality accuracy of non-metallic plate thickness gauges, the traditional inspection method is manual Add standard blocks of different thicknesses to simulate inspection of non-metallic plates of different thicknesses.

Therefore, the error detection and calibration of the non-metallic plate thickness gauge is very important. However, there is no corresponding high-precision automatic detection device on the market. The layer is the air medium layer. Compared with the real cement board medium layer, the propagation law and related attenuation parameters of the principle of electromagnetic kinematics are different in different media, which will also cause certain errors in the detected data. In turn, there may be some misjudgment of the instrument detection; for simulating non-metallic plates of different thicknesses, it is necessary to manually replace the standard blocks of different thicknesses, which is not convenient for real inspection, but will further increase the error, and manually move the scanning probe In the case of the machine, its uniform moving speed cannot be well guaranteed, and certain misjudgments will be made on the position of its detection thickness.

Contents of the invention

In order to solve the problems existing in the background technology, the present invention proposes an error detection and calibration device and method for a non-metallic plate thickness gauge. The device of the invention can be used as a self-inspection device of an inspection mechanism and an instrument use inspection unit.

The technical scheme adopted in the present invention is:

1. An error detection and calibration device for a non-metallic plate thickness gauge:

The whole device includes a standard block mechanism, a non-metallic plate thickness gauge detection mechanism and an automatic scanning mechanism for the probe; universal wheels are installed at the bottom of the standard block mechanism, and are supported on the ground through the universal wheels, and the automatic scanning mechanism for the probe is installed on the non-metallic plate On the detection mechanism of the thickness gauge.

The function of the present invention is to realize the high-precision measurement of the thickness of the non-metallic plate, and at the same time to measure and compensate the air layer in the detection process, reduce the error caused by the air medium layer to the electromagnetic signal, and adopt the self-designed center rotating standard block .

The universal wheels are mainly used for the convenience of movement of the whole device, and are mainly used in the scissor lift platform in the standard block mechanism in the present invention.

The standard block mechanism includes a scissor lift table and a plurality of acrylic plate standard blocks arranged on the scissor lift table; each acrylic plate standard block with different specifications is arranged in layers, and one end of each acrylic plate standard block has a Through hole, the cylinder runs through the through hole of each acrylic standard block, the cylinder is installed through the ball and the through hole wall, and the bottom of the cylinder is fixed on the scissor lift table, so that the acrylic standard block with different specifications Articulated mounted on scissor lift table.

The acrylic board standard block is added with glass fiber.

The detection mechanism of the non-metallic plate thickness gauge is mainly composed of a storage plate, a scanning plate and a grating ruler. The scanning plate is fixed and arranged through the device support frames on both sides. The storage plate is located directly below the scanning plate. Slidingly installed on the support frame of the device; the middle of the upper surface of the storage plate is used as the storage area, and a cuboid slot block is fixed in the storage area. A V-shaped slot is opened on the top surface of the cuboid slot block, and steel bars are installed in the V-shaped slot block. A non-metallic plate is placed in the storage area, and two foil strain gauges are arranged in the center of the lower surface of the scanning flat panel, and the two foil strain gauges are symmetrically distributed about the center point of the lower surface of the scanning flat panel.

The automatic inspection and scanning mechanism of the probe includes a ball screw and a ball screw nut seat. The ball screw is located above the scanning flat panel. There is a guide rail on the side, and the two sides of the ball screw nut seat are slid and embedded on the guide rail at the same time. A telescopic rod is installed at the bottom of the ball screw nut seat. The scanning probe of the non-metallic plate thickness gauge is fixed at the lower end of the telescopic rod. In contact with the upper surface of the scanning flatbed; the top surface of the vertical brackets on both sides of the scanning flatbed is provided with strip-shaped guide grooves, and sliders are installed in the guide grooves. The two ends of the ball screw are supported by the sliders on both sides. The rod is perpendicular to the direction of the guide groove, and a small motor is installed on the side of the vertical bracket on one side. The output shaft of the small motor is connected by a gear belt drive and a synchronous transmission of the gear located above the small motor. The gear is connected by a coupling and a ball wire. The ends of the rods are connected coaxially.

The grating ruler includes a grating head and a grating ruler bar that are matched and connected, the grating ruler bar is embedded in a vertical guide groove provided on the side of the device support frame, and the grating head is fixedly connected to the storage plate.

In the middle of the bottom surface of the acrylic plate standard block, there is a notch for fitting and installing the cuboid groove block.

It also includes a control device box and a data processing table, and the control device box and the data processing table are located on the side of the detection mechanism of the non-metal plate thickness gauge.

The control device box is installed on the left side of the detection mechanism of the non-metallic plate thickness gauge. It is mainly used to drive the storage plate up and down.

The data processing station is on the other side of the non-metallic plate thickness gauge testing mechanism relative to the control device box, and is mainly used for real-time recording and processing of testing and feedback data during the testing process, and is operated by corresponding supporting software.

The small motor is connected to the control device box, and the two-foil strain gauge, grating ruler, scanning probe, control device box and data processing table are connected.

2. A non-metallic plate thickness gauge error detection and calibration method, using the above-mentioned device, the method steps are as follows:

S1: Control the extension of the telescopic rod until the upper surface of the scanning probe and the scanning plate just touch, place steel bars in the V-shaped groove of the cuboid groove block, do not place non-metallic plates, and the axis of the steel bar is perpendicular to the axis of the ball screw;

S2: Drive the small motor to drive the ball screw to rotate, and then drive the ball screw nut seat to move horizontally through the transmission, and then drive the scanning probe to start moving at a constant speed from one end of the upper surface of the scanning plate to the other end. During the movement:

Record the position of the scanning probe when the amplitude of the displacement signal collected by the scanning probe in real time has a sudden attenuation change for the first time as the first position a, which is used as the side edge of the cross section of the steel bar;

The scanning probe continues to move at a constant speed, and the position of the scanning probe when the amplitude of the displacement signal collected by the scanning probe in real time appears minimum is taken as the second position b, which is used as the cross-sectional top of the steel bar;

The scanning probe continues to move at a constant speed, and the displacement signal amplitude collected by the scanning probe in real time is the same as the signal amplitude corresponding to the first position a. The position of the scanning probe is the third position c, which is used as the other side edge of the cross section of the steel bar;

S3: After the scanning probe reaches the third position c, stop moving at a constant speed;

S4: Drive the sliders at both ends of the ball screw to move along the guide groove to drive the ball screw to move horizontally along the axis perpendicular to itself, and at the same time drive the ball screw to rotate to drive the ball screw nut seat to move horizontally along the axis of the ball screw, so that the ball screw The rod nut seat and the scanning probe on it move at a uniform speed around the circle corresponding to the second position b as the center of the circle on the horizontal plane, and the distance between the first position a and the third position c is used as the circumference diameter;

S5: Whenever the scanning probe moves to the scanning probe position where the amplitude of the displacement signal collected in real time appears the minimum, it is considered that the distance between the scanning probe and the steel bar reaches the shortest, record the position and displacement signal amplitude data, and the scanning probe performs multiple circular movements Record multiple sets, and calculate the average value of multiple sets of data as the first detection value M1 under the air medium layer;

S6: Place acrylic plate standard blocks of different specifications between the scanning plate and the object plate in sequence, move the scanning probe to the second position b, and use the displacement signal amplitude data collected by the scanning probe as the second position under the medium layer of the standard block. For the detection value M2, an error is obtained by making a difference between the first detection value M1 and the second detection value M2, and the scanning probe is calibrated by using the error.

The acrylic plate standard block is used as a simulant of a non-metallic plate, and the non-metallic plate to be measured (such as a floor slab) is used instead of the acrylic plate standard block in specific implementation.

Use the error to calibrate the scanning probe. Specifically, repeat the above process to compare the detection value data of multiple groups of air medium layers and standard block medium layers. Use the least square method to perform data fitting to obtain the compensation amount, and the compensation amount The data acquisition process of the scanning probe is added, so that the detection data obtained during the scanning detection process of the scanning probe in the absence of a standard block and an air medium layer is the detection data of the standard block, that is, accurate data.

The scanning flat plate is made of non-metal, and the steel bar is metal.

When the detection data is transmitted back to the data, the actual detection air plus standard block medium can be compensated to the full standard block medium, so that the actual detection data will not have the error caused by the intermediate air medium, and can better and truly test the actual non- The detection data of the metal plate thickness gauge can better test the pass rate of the non-metal plate, and reduce the error between the air medium layer and the actual non-metal plate layer during the inspection process.

Overall working steps of the present invention are as follows:

S1: Determined from the zero point.

S2: Thickness detection in the case of the cement board medium layer simulated by the standard block.

S3: Thickness detection in the case of air medium layer.

S4: Correlation fitting compensation is performed using the least square method.

The beneficial effects of the present invention are:

1) The structure of the automatic inspection and scanning mechanism in the present invention is simple, which can realize the precise positioning of the detection point, and obtain multiple sets of detection thickness values by doing circular motion, so as to improve the accuracy of detection data; the self-designed standard block mechanism is used to replace the traditional manual stacking The standard block method improves the automation level and reduces the tediousness of operation.

2) In the present invention, the medium layer between the equipment is compensated from the air to simulate the cement board in the actual application by means of compensation, because the distance interval in the actual measurement object of the non-metallic plate thickness gauge to be measured is cement, and the actual interval of the equipment is It is air, which avoids a certain misjudgment of accuracy due to the detection error caused by the difference between the two medium layers. The subsequent thickness detection value even in the case of the air medium layer is the addition of a standard block to simulate the actual application. The thickness detection value of medium layer of cement board.

The present invention can be used as a standard device for non-metallic plate thickness gauge self-inspection by non-metallic plate thickness gauge manufacturers and user units, especially the precision detection of non-metallic plate thickness gauges by metrology institutes, quality inspection institutes and other relevant verification units, which greatly improves the automation level and Accuracy, avoiding the influence of materials on electromagnetic, misjudgment caused by different dielectric layers and other factors.

Description of drawings

Fig. 1 is a compensation flow chart in the present invention.

Fig. 2 is a working flow diagram of the automatic scanning mechanism of the probe in the present invention.

Fig. 3(a) is a schematic diagram of the front view of the detection of the automatic scanning mechanism of the probe in the present invention.

Fig. 3 (b) is a schematic diagram of the top view of the detection of the automatic scanning mechanism of the probe in the present invention

Fig. 4 is a schematic diagram of the overall device in the present invention.

Fig. 5(a) is a schematic diagram of the standard block mechanism in the present invention when it is not needed temporarily.

Fig. 5(b) is a schematic diagram when the standard block mechanism is needed in the present invention.

Fig. 6 is a schematic diagram of the detection mechanism of the non-metal plate thickness gauge in the present invention.

Fig. 7 is a schematic diagram of the automatic scanning mechanism of the probe in the present invention.

Fig. 8 is a schematic diagram of the distribution of two strain gauges in the present invention.

Fig. 9 is a partially enlarged schematic diagram of the grating scale connected to the object plate in the present invention.

Fig. 10 is a schematic diagram of motor-driven ball screw transmission in the present invention.

In the figure: 1. Standard block mechanism, 2. Control device box, 3. Non-metal plate thickness gauge detection mechanism, 4. Data processing table, 5. Probe automatic scanning mechanism, 101. Standard block, 102. Scissor type Lifting table, 104. Ball, 105. Cylinder, 301. Storage plate, 302. Scanning plate, 303. Two-foil strain gauge, 304. Cuboid groove block with V-shaped notch, 305. Steel bar, 306 Device support Frame, 307. Bottom support plate, 308. Grating ruler, 501. Ball screw, 502. Ball screw nut seat, 503. Telescopic rod, 504. Scanning probe of non-metallic plate thickness gauge, 505. Support frame on both sides, 507 .Small motor, 508. Coupling, 509. Two sliders.

Detailed ways

The present invention will be further described below in conjunction with drawings and embodiments.

As shown in Figure 4, the entire device includes a standard block mechanism 1, a control device box 2, a non-metallic plate thickness gauge detection mechanism 3, a data processing platform 4, and a probe automatic scanning mechanism 5; the bottom of the standard block mechanism 1 is equipped with a universal The wheel is supported on the ground by universal wheels, the automatic scanning mechanism 5 of the probe is installed on the detection mechanism 3 of the non-metallic plate thickness gauge, and the control device box 2 and the data processing table 4 are located on the side of the detection mechanism 3 of the non-metallic plate thickness gauge square.

As shown in Figure 5, the standard block mechanism 1 includes a scissor lift table 102 and a plurality of acrylic plate standard blocks 101 arranged on the scissor lift table 102; One end of the acrylic plate standard block 101 has a through hole, and the cylinder 104 runs through the through hole of each acrylic plate standard block 101. The cylinder 104 is installed with the through hole wall through the ball 105, and the bottom of the cylinder 104 is fixed on the lifting platform 102 Above, the acrylic standard blocks 101 with different specifications are hingedly installed on the lifting platform 102 to form a central rotating structure, and each acrylic standard block 101 can rotate around the cylinder 104 independently.

As shown in Figure 6, the detection mechanism 3 of the non-metallic plate thickness gauge is mainly composed of a storage plate 301, a scanning plate 302 and a grating ruler 308. The scanning plate 302 is fixedly arranged by the device support frames 306 on both sides, and the device support frames on both sides 306 is fixed on the bottom support plate 307, and the object storage plate 301 is located directly below the scanning plate 302. The two ends of the object storage plate 301 are vertically slid and installed on the device support frame 306 through the grating ruler 308; There is a cuboid trough 304 fixed in the middle, a V-shaped groove is opened on the top surface of the cuboid trough 304, a steel bar 305 is installed in the V-shaped groove, and a non-metal plate is placed in the storage area around the cuboid trough 304, specifically the non-metal plate is placed on the scanning flat panel 302 and the storage plate 301, and the bottom is embedded in the cuboid groove block 304 for positioning and installation. As shown in Figure 8, two foil strain gauges 303 are arranged on the lower surface of the scanning plate 302; the probe automatic scanning mechanism 5 includes ball The ball screw 501 and the ball screw nut seat 502, the ball screw 501 is located above the scanning flat panel 302, and the ball screw 501 is threaded with a ball screw nut seat 502 to form a screw nut pair, and the two sides of the ball screw 501 are provided with On the guide rail, both sides of the ball screw nut seat 502 are slid and embedded on the guide rail at the same time. A telescopic rod 503 is installed at the bottom of the ball screw nut seat 502. The scanning probe 504 of the non-metallic plate thickness gauge is fixed on the lower end of the telescopic rod 503 to scan The probe 504 is used to contact the upper surface of the scanning flat panel 302; the top surface of the vertical support 505 on both sides of the scanning flat panel 302 is provided with a bar-shaped guide groove, and the two vertical supports 505 on both sides are fixed on both sides of the scanning flat panel 302, guiding Sliders 509 are installed in the grooves, the two ends of the ball screw 501 are supported by the sliders 509 on both sides, and the ball screw 501 is perpendicular to the direction of the guide groove, as shown in Figure 10, one side of the support frame is installed on the side There is a small motor 507, the output shaft of the small motor 507 is connected with the gear synchronous transmission on the top of the small motor 507 through the gear belt transmission, and the gear is connected coaxially with the end of the ball screw 501 through the shaft coupling 5-8; the small motor 507 The operation drives the gear and the ball screw 501 to rotate, and then drives the ball screw nut seat 502 to move horizontally through the screw nut pair.

As shown in Figure 3(a), Figure 3(b), and Figure 7, the ball screw nut seat 502 is driven to move in the horizontal X direction on the screw rod 501, and the slider 509 moves in the Y direction on the vertical support 505 , by controlling the movement of the slider 509 and the movement of the ball screw nut seat 502, the scanning probe 504 can be driven to complete a circular motion.

As shown in Figure 9, the grating ruler 308 includes a grating head 3081 and a grating ruler rod 3082 that are matched and connected. The plate 301 is fixedly connected; when the storage plate 301 moves up and down, it drives the grating head 3081 to move on the grating scale bar 3082 to obtain the displacement data of the grating scale.

The middle of the bottom surface of the acrylic plate standard block 101 is provided with a notch for cooperating installation of the cuboid groove block 304 .

As shown in Figure 1, the specific implementation process of the present invention is as follows:

S1: Control the expansion and contraction of the telescopic rod 503 until the upper surface of the scanning probe 504 and the scanning flat panel 302 are just in contact, place steel bars in the V-shaped groove of the cuboid groove block 304, do not place non-metallic plates, and the axis of the steel bar is perpendicular to the axis of the ball screw 501 ;

S2: Drive the small motor 507 to drive the ball screw 501 to rotate, and drive the ball screw nut seat 502 to move horizontally through the transmission. One end moves at a constant speed, as shown in Figure 2. During the movement, the scanning probe 504 emits electromagnetic waves in a straight line downward. The electromagnetic waves pass through the scanning flat panel 302 to detect objects directly below, and when they encounter metal objects, they are reflected to obtain displacement distance data:

Record the position of the scanning probe 504 when the amplitude of the displacement signal collected in real time by the scanning probe 504 has a sudden attenuation change for the first time as the first position a, the position is the position along the axial movement of the ball screw 501, and is used as the side edge of the cross section of the steel bar;

The scanning probe 504 continues to move at a constant speed, and the position of the scanning probe 504 when the displacement signal amplitude collected in real time by the recording scanning probe 504 appears as the second position b is the second position b. At this time, the distance between the scanning probe 504 and the reinforcing bar reaches the shortest, which is used as the cross-section top of the reinforcing bar;

The scanning probe 504 continues to move at a constant speed, and the displacement signal amplitude collected by the scanning probe 504 in real time is the same as the signal amplitude corresponding to the first position a. The position of the scanning probe 504 is the third position c, which is the other side edge of the section of the steel bar;

S3: After the scanning probe 504 reaches the third position c, stop moving at a constant speed;

S4: Drive the sliders at both ends of the ball screw 501 to move along the guide groove to drive the ball screw 501 to move horizontally along the axis perpendicular to itself, and at the same time drive the ball screw 501 to rotate and drive the ball screw nut seat 502 to move horizontally along the axis of the ball screw 501 Move, the superposition of movement in both horizontal directions, so that the ball screw nut seat 502 and the scanning probe 504 on it surround the second position b on the horizontal plane as the center of the circle, between the first position a and the third position c The distance between them is the circular uniform motion of the diameter of the circle;

S5: Whenever the scanning probe 504 moves to the position of the scanning probe 504 where the amplitude of the displacement signal collected in real time appears the minimum, it is considered that the distance between the scanning probe 504 and the steel bar reaches the shortest, and the position and displacement signal amplitude data are recorded, and the scanning probe 504 does Record multiple sets of multiple circular motions, and calculate the average value of multiple sets of data as the first detection value M1 under the air medium layer;

S6: Place acrylic plate standard blocks 101 of different specifications between the scanning flat plate 102 and the storage flat plate 101 in sequence, and the bottom of the acrylic plate standard block 101 is embedded in the cuboid groove block 304 for positioning and installation, and the scanning probe 504 is moved to the second At the second position b, the displacement signal amplitude data collected by the scanning probe 504 is used as the second detection value M2 under the medium layer of the standard block, and the error is obtained by making a difference between the first detection value M1 and the second detection value M2, and using the error to scan the probe 504 for calibration.

The acrylic plate standard block 101 is used as a simulant of a non-metallic plate, the scanning flat plate 302 is non-metallic, and the steel bar is metal.

Use the error to calibrate the scanning probe 504. Specifically, repeat the above process to compare the detection value data of multiple groups of air medium layers and standard block medium layers, and use the least square method to perform data fitting to obtain the compensation amount, and the compensation The amount is added to the data acquisition process of the scanning probe 504, so that the detection data obtained during the scanning detection process of the scanning probe in the absence of standard blocks and air medium layers is the detection data in the case of standard blocks, that is, accurate data. In this way, the detection device after data compensation can better simulate the thickness detection of the cement board in actual application, and avoid errors caused by the difference between the air medium layer in the inspection process and the cement board medium layer in actual application.

In the beginning, the position and the distance between the scanning flat plate 302 and the object flat plate 301 are fixed. In specific implementation, when placing the acrylic standard block 101 , it is necessary to move down the object flat 301 , and then place the acrylic standard block 101 . When placing the acrylic plate standard block 101, the grating ruler 308 adjusts the position of the object flat plate 301 with positioning, so that the reading of the grating ruler 308 next to the object flat plate 301 after the acrylic plate standard block 101 is placed and the object flat plate before the acrylic plate standard block 101 is placed The readings of grating ruler 308 next to 301 are consistent.

After the above-mentioned device and method of the present invention carry out the specially designed error calibration, the thickness detection under the condition of the cement board medium layer in the simulation of actual application can be completed in the inspection process, and the error caused by the difference between the air medium layer and the actual cement board medium layer can be avoided. test error.

Finally, it should be pointed out that the above embodiment and a control method proposed are only representative examples of the present invention. Obviously, the technical solution of the present invention is not limited to the above embodiment and a control method proposed, and there are many out of shape. All deformations that can be derived or associated directly from the disclosure content of the present invention by those skilled in the art should be considered as the protection scope of the present invention.

Claims (10)

1. A non-metallic plate thickness gauge error detection and calibration device is characterized in that: the whole device comprises a standard block mechanism (1), a control device box (2), a data processing station (4), and a non-metallic plate thickness gauge detection Mechanism (3) and probe automatic scanning mechanism (5); universal wheels are installed at the bottom of the standard block mechanism (1), and are supported on the ground through universal wheels, and the probe automatic scanning mechanism (5) is installed on the non-metallic plate for thickness measurement on the instrument detection mechanism (3); the control device box (2) and the data processing table (4) are located at the side of the non-metal plate thickness gauge detection mechanism (3); The detection mechanism (3) of the non-metallic plate thickness gauge is mainly composed of a storage plate (301), a scanning plate (302) and a grating ruler (308), and the scanning plate (302) is fixed by device support frames (306) on both sides Arrangement, the storage flat plate (301) is located directly below the scanning flat panel (302), and the two ends of the storage flat panel (301) are vertically slid and installed on the device support frame (306) through the grating ruler (308); the middle of the upper surface of the storage flat panel (301) is As the storage area, a cuboid trough (304) is fixed in the storage area, a V-shaped groove is opened on the top surface of the cuboid trough (304), and a steel bar (305) is installed in the V-shaped groove, and the storage area around the cuboid trough (304) A non-metallic plate is placed, and two foil-type strain gauges (303) are arranged in the center of the lower surface of the scanning flat panel (302), and the two foil-type strain gauges (303) are distributed symmetrically with respect to the central point of the lower surface of the scanning flat panel (302); The probe automatic inspection scanning mechanism (5) includes a ball screw (501) and a ball screw nut seat (502), the ball screw (501) is located above the scanning flat panel (302), and the ball screw (501) passes through The threaded set has a ball screw nut seat (502) to form a screw nut pair. There are guide rails on both sides of the ball screw (501). A telescopic rod (503) is installed at the bottom of the nut seat (502), the scanning probe (504) of the non-metal plate thickness gauge is fixed on the lower end of the telescopic rod (503), and the scanning probe (504) is used to contact the scanning flat plate (302) The upper surface; the top surface of the vertical support (505) on both sides of the scanning flat panel (302) is provided with a bar-shaped guide groove, and slide blocks (509) are installed in the guide groove, and the two ends of the ball screw (501) are supported on two sides. The slide block (509) on the side and the ball screw (501) are perpendicular to the direction of the guide groove, and a small motor (507) is installed on the side of the vertical support (505) on one side, and the output shaft of the small motor (507) is The gear belt transmission is connected with the synchronous transmission of the gear positioned above the small motor (507), and the gear is connected coaxially with the end of the ball screw (501) through a shaft coupling (508). 2. A non-metallic plate thickness gauge error detection and calibration device according to claim 1, characterized in that: the standard block mechanism (1) includes a scissor lift table (102) and is arranged in a scissor type A plurality of acrylic plate standard blocks (101) on the lifting platform (102); each acrylic plate standard block (101) with different specifications is arranged in layers, and one end of each acrylic plate standard block (101) has a through hole, and the cylinder ( 104) run through the through holes of each acrylic plate standard block (101), the cylinder (104) is installed through the ball (105) and the wall of the through hole, and the bottom of the cylinder (104) is fixed on the scissor lift table (102) above, so that the acrylic plate standard blocks (101) with different specifications are hingedly installed on the scissor lift table (102). 3. The error detection and calibration device for non-metallic plate thickness gauge according to claim 1, characterized in that glass fiber is added to the acrylic plate standard block (101). 4. A non-metallic plate thickness gauge error detection and calibration device according to claim 1, characterized in that: the grating ruler (308) includes a grating head (3081) and a grating ruler rod (3082) that are mated and connected ), the grating ruler rod (3082) is embedded in the vertical guide groove provided on the side of the device support frame (306), and the grating head (3081) is fixedly connected with the storage plate (301). 5. A non-metallic plate thickness gauge error detection and calibration device according to claim 3, characterized in that: the middle of the bottom surface of the acrylic plate standard block (101) is provided with a cuboid groove block (304) for cooperating installation notch. 6. A non-metallic plate thickness gauge error detection and calibration device according to claim 3, characterized in that: the small motor (507) is connected to the control device box (2), two foil strain gauges (303), grating Ruler (308), scanning probe (504), control device box (2) and data processing desk (4) are connected. 7. A non-metallic plate thickness gauge error detection and calibration method, characterized in that, the error detection and calibration device for a non-metallic plate thickness gauge according to any one of claims 1-6, the method steps are as follows: S1: Control the expansion rod (503) until the upper surface of the scanning probe (504) and the scanning flat plate (302) are just in contact, place steel bars in the V-shaped groove of the cuboid block (304), do not place non-metallic plates, and the axis of the steel bars perpendicular to the axis of the ball screw (501); S2: Drive the small motor (507) to drive the ball screw (501) to rotate, drive the ball screw nut seat (502) to move horizontally through the transmission, and then drive the scanning probe (504) to start scanning the upper surface of the flat plate (302) One end moves at a constant speed to the other end, and in the motion process: record the position of the scanning probe (504) when the displacement signal amplitude collected in real time by the scanning probe (504) has a sudden attenuation change for the first time as the first position a, as the cross-section side of the steel bar edge; the scanning probe (504) continues to move at a constant speed, and the scanning probe (504) position when the displacement signal amplitude collected in real time by the recording scanning probe (504) occurs as the second position b as the second position b, as the section top of the reinforcing bar; the scanning probe (504) ) continue to move at a constant speed, record the displacement signal amplitude collected by the scanning probe (504) in real time and the same scanning probe (504) position as the signal amplitude corresponding to the first position a as the third position c, as the other side edge of the section of the reinforcing bar; S3: After the scanning probe (504) reaches the third position c, stop moving at a constant speed; S4: Drive the sliders at both ends of the ball screw (501) to move along the guide groove to drive the ball screw (501) to move horizontally along the axis perpendicular to itself, and at the same time drive the ball screw (501) to rotate to drive the ball screw nut seat (502 ) moves horizontally along the axis of the ball screw (501), so that the ball screw nut seat (502) and the scanning probe (504) on it surround the second position b as the center of the circle on the horizontal plane, taking the first position a and the second position a The distance between the three positions c is used as the circular uniform motion of the circular diameter; S5: Whenever the scanning probe (504) moves to the position of the scanning probe (504) when the displacement signal amplitude collected in real time is the minimum, it is considered that the distance between the scanning probe (504) and the steel bar reaches the shortest, and the position and displacement signal amplitude are recorded Data, the scanning probe (504) performs multiple circular motions to record multiple groups, and calculates the average value of multiple groups of data as the first detection value M1 under the air medium layer; S6: Place acrylic plate standard blocks (101) of different specifications between the scanning flat plate (302) and the object flat plate (301) in sequence, move the scanning probe (504) to the second position b, pass the scanning probe (504) The collected displacement signal amplitude data is used as the second detection value M2 under the medium layer of the standard block, the difference between the first detection value M1 and the second detection value M2 is obtained to obtain an error, and the scanning probe (504) is calibrated using the error. 8. The error detection and calibration method of a non-metallic plate thickness gauge according to claim 7, characterized in that: the acrylic plate standard block (101) is used as a simulant of a non-metallic plate, and the method to be tested is used in the specific implementation The non-metallic plate replaces the acrylic plate standard block (101). 9. The error detection and calibration method of a non-metallic plate thickness gauge according to claim 7, characterized in that: the scanning probe (504) is calibrated with the error, specifically repeating the above-mentioned process to obtain multiple groups of air medium layer and the detection value data of the standard block medium layer, utilize the least squares method to carry out data fitting to obtain the compensation amount, and add the compensation amount in the data acquisition process of the scanning probe (504), so that there is no standard block, air medium layer In the case of the scanning probe, the detection data obtained during the scanning detection process is the detection data in the case of the standard block, which is accurate data. 10. The error detection and calibration method for a non-metal plate thickness gauge according to claim 7, characterized in that: the scanning flat panel (302) is made of non-metal, and the steel bar is metal.