CN204854766U - Because of levelling staff error of zero point made of baked clay detection and adjusting device based on image vision - Google Patents

Abstract

The utility model relates to a device for detecting and adjusting the zero point difference of an Invar leveling scale based on image vision, which comprises a base, one end of which is equipped with a reference block for zero point detection, and the other end of the base is equipped with a spring clamping device for zero point detection. A standard gauge block and two flat-nose pliers with upward openings are installed on the base between the reference block and the spring tensioning device. The standard gauge block and the zero-point detection reference block are closely connected together. The pliers and the spring clamping device are in a straight line, and an optical imaging magnification system is arranged above the edge of the standard gauge block away from the zero point detection reference block, and the optical imaging magnification system is connected with the display. The utility model adopts a standard gauge block to determine the standard zero position, and its precision is much higher than that determined by other linear measuring tools such as a metal linear ruler. Small impact, low labor intensity, more stable quality and higher efficiency.

Description

Invar leveling scale zero point difference detection and adjustment device based on image vision

technical field

The utility model relates to the field of parameter detection of the Invar leveling scale, in particular to an image vision-based zero point difference detection and adjustment device for the Invar leveling scale, which is suitable for use in large-scale production of Invar barcode leveling scale production enterprises.

Background technique

In the production process of the Invar barcode leveling scale, since the zero point of the indication value and the zero point of the bottom surface of the scale cannot completely coincide, there will always be a constant, that is, the zero point difference. The difference between the two constants of a pair of scales is the difference between the zero point difference. In the first-class and second-class precision leveling observations, the accuracy of the Invar barcode leveling staff is crucial to the observation results, and the difference between the zero points of the Invar barcode leveling staff is one of the main indicators of the accuracy of the Invar barcode leveling staff. In the JJG8-1991 leveling rod verification regulations and JJG2102-2013 Invar barcode leveling rod verification regulations are mandatory inspection items, in order to ensure the use, it is particularly critical to detect and adjust the zero point difference position error of each ruler. There are currently two types of detection and adjustment devices, one is an indoor device, which consists of a laser interferometer (or a high-precision metal line scale), a guide rail, a scale groove, a movable workbench with an optical microscope, and a movable prism. The special-purpose device that etc. constitute, device is complicated, and cost cost is very high. The other is the method of measuring and adjusting with a digital level published by Tao Maosheng and Luo Guande in the 2006 Surveying and Mapping Bulletin. This method has high requirements for the site and experimental conditions. Good, the weather conditions are stable, and there is no strong vibration. Take a certified Ni002 instrument at one end and set it up for strict leveling. Set up a stable ruler pile at the other end to strictly level the leveling staff. Read the same division of each scale. Take 10 sets of data and take the average value, and find the difference between the zero point difference of a pair of scales." According to the measured zero point difference difference, the adjustment is gradually approached, and the above measurement process is repeated until the specification requirements are met. The above two methods are complex in zero point difference detection and adjustment process, both are manual aiming and recording data, labor-intensive, human factors are greatly affected, and the efficiency is not high. There is an urgent need for a barcode leveling scale manufacturer suitable for mass production. , High-efficiency zero point difference detection and adjustment device.

Contents of the invention

The technical problem to be solved by the utility model is to provide a device for detecting and adjusting the zero point difference of the Invar leveling scale based on image vision. More stable and more efficient.

In order to achieve the above object, the technical scheme that the utility model takes is:

A device for detecting and adjusting the zero point difference of an Invar leveling scale based on image vision, comprising a base, a zero point detection reference block is installed on one end of the base, and a spring clamping device is installed on the other end of the base, and the zero point detection reference block A standard gauge block and two flat-nose pliers with upward openings are installed on the base between it and the spring tensioning device. The standard gauge block and the zero-point detection reference block are closely attached together. The pliers and the spring clamping device are in a straight line, and an optical imaging magnification system is arranged above the edge of the standard gauge block away from the zero point detection reference block, and the optical imaging magnification system is connected with the display.

The spring tightening device includes a fixed plate fixed on the base, a fixed hole is pierced on the fixed plate, the axis of the fixed hole coincides with the above-mentioned straight line, and a shaft is pierced in the fixed hole, and the shaft is fixed at one end of the reference block close to the zero point detection There is a top, the other end of the shaft is fixed with a limiting plate, and a spring is sleeved on the shaft between the top and the fixed plate.

A cushion block installed on the base is arranged under the standard gauge block.

The zero-point detection reference block has a magnetic switch, and when the magnetic force is turned on, the standard gauge block can be adsorbed on the zero-point detection reference block.

The utility model adopts a standard gauge block to determine the standard zero position, and its precision is much higher than that determined by other line-type measuring tools such as a metal line scale. The optical imaging amplification system has the functions of optical amplification and image amplification, and the measurement accuracy is high. ;Measurement results can be displayed on the display at the same time as the standard zero position, the tolerance range of zero point difference and the actual zero position of the Invar leveling scale. When adjusting the zero position, it can dynamically display the change status of the actual zero position, which is very intuitive. Compared with other detection methods, the device does not require manual aiming, so the detection and adjustment accuracy is high, the influence of human factors is small, the labor intensity is small, the quality is more stable, and the efficiency is higher.

Description of drawings

Fig. 1 is a schematic structural view of an embodiment of the utility model.

Fig. 2 is a schematic diagram of the inspection state of the utility model.

Fig. 3 is a schematic diagram of the state of detecting the zero point difference of the inspected Invar leveling rod.

Fig. 4 is a schematic diagram of the visual image detected by the inspected Invar leveling scale on the display.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figure 1 and Figure 2, a device for detecting and adjusting the zero point difference of the Invar leveling scale based on image vision includes a base 1, and a zero point detection reference block 2 is installed on one end of the base 1, and the zero point detection reference block 2 is It is used to detect the positioning datum of the zero point difference of the Invar leveling scale. The other end of the base 1 is equipped with a spring clamping device 3, which provides a unidirectional pressing force to ensure that the bottom surface of the Invar leveling scale being checked is in line with the The zero-point detection reference block is in reliable contact. On the base 1 between the zero-point detection reference block 2 and the spring clamping device 3, a standard gauge block 4 and two flat-nose pliers 5 with upward openings are installed. The standard gauge block 4 and the zero-point detection reference block 2 close together, the standard gauge block 4 is used to determine the standard zero position, the state when generating the standard zero position line, the flat-nose pliers 5 is used to install and position the checked Invar leveling scale, the zero point detection reference block 2, the standard quantity Block 4, flat-nose pliers 5 and spring clamping device 3 are on a straight line, and an optical imaging magnification system 6 is arranged above the edge of the standard gauge block away from the zero point detection reference block, and the optical imaging magnification system 6 is connected with a display 7 .

The spring tightening device 3 includes a fixed plate 8 fixed on the base 1. A fixed hole is pierced on the fixed plate 8. The axis of the fixed hole coincides with the above-mentioned straight line. A shaft 9 is pierced in the fixed hole. The shaft detects the reference block near the zero point. One end of the top is fixed with a top 10, the other end of the shaft 9 is fixed with a limit plate 11, and a spring 12 is sleeved on the shaft between the top 10 and the fixed plate 8. A spacer 13 installed on the base is arranged under the standard gauge block 4, which makes the imaging quality of the standard gauge block better.

The zero-point detection reference block 2 has a magnetic switch, and the standard gauge block 4 can be adsorbed on the zero-point detection reference block when the magnetic force is turned on, which is convenient for installation.

When installing two flat-nose pliers in this new experiment, the planes of the fixed jaws of the two flat-nose pliers are coplanar to ensure that the level is maintained when the Invar level is placed; The plane of the tile level gauge is perpendicular to the positioning surface of the zero-point detection reference block, so that the two flat-nose pliers, the zero-point detection reference block, and the spring tensioning device are in a straight line. When the optical imaging magnification system is installed, the optical axis of the optical imaging magnification system is parallel to the positioning surface of the zero point detection reference block and perpendicular to the installation plane of the base.

The utility model works according to the following steps during specific use: (1), select the standard gauge block of corresponding size according to the requirement of the zero point position size of the Invar leveling scale, such as 60cm; (2), place the standard gauge block 4 on the pad 13 , turn on the magnetic force, so that the standard gauge block 4 is adsorbed on the positioning surface of the zero-point detection reference fast 2; (3), collect images, and form a standard zero-point position line on the display through the measurement software, and according to different types of Invar levels The scale generates a tolerance zone of zero point difference; (4), remove the standard gauge block and spacer, put in the inspected Invar level gauge 14, and loosen the spring clamping device 3, so that the end face of the Invar level gauge and the zero point detection benchmark are quickly (5) Operate the flat-nose pliers to gently clamp the Invar leveling rod to ensure that the Invar leveling rod is in reliable contact with the fixed jaw plane of the flat-nose pliers and the plane on which the Invar leveling rod is placed; (6), Collect the image, form the image of the zero point line of the Invar leveling scale on the display through the measurement software, and give the zero point difference value of the Invar leveling scale. So far, a measurement of the zero point difference of the Invar leveling scale is completed. If you need to adjust the zero line of the high Invar leveling rod, you can adjust it through the adjustment mechanism of the Invar leveling rod, such as an eccentric wheel, and observe the position of the zero line of the Invar leveling rod on the computer screen until you are satisfied.

As shown in Figure 3, it is the state of the utility model detecting the zero point difference of the inspected Invar leveling rod, and the position of the right edge of the line frame indicated by A in the top view represents the zero point position of the Invar leveling rod.

As shown in Figure 4, it is the visual image that the utility model forms on the display screen, wherein the middle line represented by B is the standard zero position, and the area determined by the lines on both sides of the middle line is the tolerance range of zero point difference, The square represented by C is the image of the line pattern of the zero line position of the checked scale, and the deviation of its right edge from the standard zero line is the zero point difference of the Invar leveling scale.

Claims (4)

1. the invar levelling staff error of zero point Detection and adjustment device based on image vision, comprise pedestal, it is characterized in that: on described pedestal, one end is provided with detection reference block at zero point, on pedestal, the other end is provided with spring top clamping device, zero point detection reference block and spring top clamping device between pedestal on the flat-nose pliers of standard gauge block and two opening upwards is installed, standard gauge block and zero point detection reference block be close together, described zero point detection reference block, standard gauge block, flat-nose pliers and spring top clamping device are point-blank, optical imagery amplification system is provided with above the edge of standard gauge block away from detection reference block at zero point, optical imagery amplification system is connected with display.

2. the invar levelling staff error of zero point Detection and adjustment device based on image vision according to claim 1, it is characterized in that: described spring top clamping device comprises the fixed head be fixed on pedestal, fixed head is installed with a fixed orifice, the axis of fixed orifice overlaps with above-mentioned straight line, an axle is installed with in fixed orifice, axle near zero point detection reference block one end be fixed with top, the other end of axle is fixed with limiting plate, comes directly towards on the axle between fixed head and overlaps and have a spring.

3. the invar levelling staff error of zero point Detection and adjustment device based on image vision according to claim 1, is characterized in that: be provided with the cushion block be arranged on pedestal below described standard gauge block.

4. the invar levelling staff error of zero point Detection and adjustment device based on image vision according to claim 1, is characterized in that: described zero point, detection reference block was with magnetic switch, standard gauge block can be adsorbed on detection reference block at zero point when connecting magnetic force.