A device for calibrating the indication error of laser level meter

Abstract

The utility model relates to a device for calibrating the indication error of a laser level gauge, belonging to the field of metrology detection technology, and comprising: a plate (1), a laser transmitter (2), a processor (3), a laser receiver (5) and a special gauge block group (6); the plate (1) is arranged at the bottom, the upper surface of the plate (1) is arranged as a horizontal plane 4, and the left and right sides above the plate (1) are respectively provided with a laser transmitter (2) and a laser receiver (5); the special gauge block group (6) is selectively arranged under the laser transmitter (2) or the laser receiver (5) according to the test requirements of the receiving range of the laser receiver (5); under the premise of ensuring accuracy, the arrangement of measuring points is reduced, the calibration efficiency is improved, and the rectangular special standard test block with a corresponding height is selected to meet the requirements of value transfer, and on the basis of improving the calibration accuracy of the indication error, the arrangement structure of the calibration device can be simplified, and the calibration operation process can be simplified.

Description

Technical Field

[0001] The utility model belongs to the technical field of measurement and detection, and in particular relates to a device for calibrating the indication error of a laser level meter. Background Art

[0002] At present, there is no national / industry calibration specification or standard for the laser level meter, a working measuring instrument. The indication error is a very important parameter. How to provide an effective device for measuring the indication error is an urgent problem to be solved. Utility Model Content

[0003] 1. Technical issues to be resolved

[0004] The technical problem to be solved by the utility model is to provide a device for calibrating the indication error of a laser level meter so as to solve the problem of calibrating the indication error of the laser level meter.

[0005] (II) Technical solution

[0006] In order to solve the above technical problems, the utility model provides a device for calibrating the indication error of a laser level meter, comprising: a plate 1, a laser transmitter 2, a processor 3, a laser receiver 5 and a special gauge block group 6;

[0007] The flat plate 1 is arranged at the bottom, the upper surface of the flat plate 1 is arranged as a horizontal plane 4, and the left and right sides above the flat plate 1 are respectively provided with a laser transmitter 2 and a laser receiver 5;

[0008] The output ends of the laser transmitter 2 and the laser receiver 5 are respectively connected to the processor 3 for transmitting the laser transmission data and the laser reception data to the processor 3;

[0009] The dedicated gauge block group 6 is selectively arranged under the laser transmitter 2 or the laser receiver 5 according to the requirements of the receiving range test of the laser receiver 5 .

[0010] The receiving range of the laser receiver 5 includes: positive calibration point measurement and negative calibration point measurement;

[0011] When the positive calibration point is selected for measurement, the special gauge block group 6 is arranged below the laser receiver 5;

[0012] When the negative calibration point measurement is selected, the dedicated gauge block group 6 is arranged below the laser transmitter 2 .

[0013] The special gauge block group 6 is provided with eight special standard test blocks;

[0014] The eight special standard test blocks are all arranged as cuboid structures with rectangular cross-sections. The upper and lower surfaces of each special standard test block are a pair of mutually parallel measuring surfaces.

[0015] Among them, the heights of the eight special standard test blocks are set to 3.65mm, 7.30mm, 10.95mm, 14.60mm, 18.25mm, 21.90mm, 25.55mm, and 29.60mm respectively;

[0016] The height of each of the dedicated standard test blocks is set to be the height of the laser receiver 2 calibration point.

[0017] Wherein, the processor 3 is configured as a mobile tablet computer.

[0018] (III) Beneficial effects

[0019] Compared with the prior art, the utility model has the following beneficial effects: under the premise of ensuring accuracy, by reducing the layout of measuring points, the calibration efficiency is improved, and with the selection of special rectangular standard test blocks of corresponding heights, it meets the requirements of value transfer, and on the basis of improving the calibration accuracy of the indication error, it can simplify the layout structure of the calibration device, simplify the calibration operation process, and save calibration costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the utility model device;

[0021] Figure 2 This is a schematic diagram of the structure of a special standard test block. DETAILED DESCRIPTION

[0022] In order to make the purpose, content, and advantages of the utility model clearer, the specific implementation methods of the utility model are further described in detail below in conjunction with the drawings and embodiments.

[0023] Example 1

[0024] This embodiment provides a device for calibrating the indication error of a laser level meter, comprising: a plate 1, a laser transmitter 2, a processor 3, a laser receiver 5 and a special gauge block group 6;

[0025] The flat plate 1 is arranged at the bottom, the upper surface of the flat plate 1 is arranged as a horizontal plane 4, and the left and right sides above the flat plate 1 are respectively provided with a laser transmitter 2 and a laser receiver 5;

[0026] The output ends of the laser transmitter 2 and the laser receiver 5 are respectively connected to the processor 3 for transmitting the laser transmission data and the laser reception data to the processor 3;

[0027] The dedicated gauge block group 6 is selectively arranged under the laser transmitter 2 or the laser receiver 5 according to the requirements of the receiving range test of the laser receiver 5 .

[0028] The receiving range of the laser receiver 5 includes: positive calibration point measurement and negative calibration point measurement;

[0029] When the positive calibration point is selected for measurement, the special gauge block group 6 is arranged below the laser receiver 5;

[0030] When the negative calibration point is selected for measurement, the special gauge block group 6 is arranged below the laser emitter 2. The special gauge block group 6 is provided with eight special standard test blocks in total;

[0031] The eight special standard test blocks are all arranged as cuboid structures with rectangular cross-sections. The upper and lower surfaces of each special standard test block are a pair of mutually parallel measuring surfaces.

[0032] Among them, the heights of the eight special standard test blocks are set to 3.65mm, 7.30mm, 10.95mm, 14.60mm, 18.25mm, 21.90mm, 25.55mm, and 29.60mm respectively;

[0033] The height of each of the dedicated standard test blocks is set to be the height of the laser receiver 2 calibration point.

[0034] Wherein, the processor 3 is configured as a mobile tablet computer.

[0035] For laser leveling instruments with a laser receiver receiving range of ±30mm, a special standard test block is selected, and the calibration points are 3.65mm, 7.30mm, 10.95mm, 14.60mm, 18.25mm, 21.90mm, 25.55mm, 29.60mm, -3.65mm, -7.30mm, -10.95mm, -14.60mm, -18.25mm, -21.90mm, -25.55mm, -29.60mm. According to the different receiving ranges of the laser receiver, the maximum number of measuring points shall be selected for calibration, not less than six points.

[0036] Measurement of the calibration point within the receiving range of the laser receiver: Place the laser transmitter at one end of the flat surface, place the special standard test block at the other end of the flat surface, and place the laser receiver on the special standard test block. Use infrared signals to adjust the rotating laser so that the laser plane 4 is parallel to the flat surface. Select the special standard test blocks of the corresponding height and measure them in turn. Each calibration point is measured three times. The average of the three measurement values ​​is taken as the measurement result dx of the calibration point. Subtract the nominal value ds of the special standard test block to obtain the indication error Δ of the calibration point, see formula (1).

[0037] Measurement of negative calibration points within the receiving range of the laser receiver: Place the laser receiver at one end of the flat plate, place the special standard test block on the other end of the flat plate, and place the laser transmitter on the special standard test block. Select the special standard test blocks of the corresponding height and measure them in turn. Measure each calibration point three times, and take the average of the three measurement values ​​as the measurement result dx of the calibration point. Subtract the nominal value ds of the special standard test block to obtain the indication error Δ of the calibration point, see formula (4).

[0038] Δ=d x -d s (1)

[0039] Where:

[0040] Δ——indication error of the measured value, mm;

[0041] d x ——measurement value of the calibration point, mm;

[0042] d s ——Nominal value of special standard test block, mm.

[0043] Example 2

[0044] In this embodiment, calibration points are selected according to the different measuring ranges of the laser level meter. For a level meter with a measuring range of (-11 to 11) mm, the measuring points are 3.65 mm, 7.30 mm, 10.95 mm, -3.65 mm, -7.30 mm, and -10.95 mm.

[0045] During measurement, the laser transmitter is placed on one side of the plate, and the rotating laser is adjusted using infrared signals to keep the laser plane 4 parallel to the plate plane.

[0046] According to the calibration point, select the corresponding height special standard test block, place the special standard test block at a distance of 1m from the laser transmitter, and place the laser receiver on the special standard test block. The difference between the laser receiver measurement value and the standard value of the special standard test block is the flatness indication error of the laser level meter. According to the above method, place the special gauge block under the laser transmitter to measure the calibration point in the opposite direction, and obtain the measurement value indication error in the negative direction.

[0047] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A device for calibrating the indication error of a laser level meter, characterized in that: include: A plate (1), a laser transmitter (2), a processor (3), a laser receiver (5), and a dedicated gauge block group (6); The flat plate (1) is arranged at the bottom, the upper surface of the flat plate (1) is arranged as a horizontal plane (4), and a laser transmitter (2) and a laser receiver (5) are respectively arranged on the left and right sides above the flat plate (1); The output ends of the laser transmitter (2) and the laser receiver (5) are respectively connected to the processor (3) for transmitting the laser transmission data and the laser reception data to the processor (3); The dedicated gauge block group (6) is selectively arranged under the laser transmitter (2) or the laser receiver (5) according to the requirements of the receiving range test of the laser receiver (5).

2. The device for calibrating the indication error of a laser level meter according to claim 1, characterized in that: The receiving range of the laser receiver (5) includes: positive calibration point measurement and negative calibration point measurement; When the positive calibration point is selected for measurement, the special gauge block group (6) is arranged below the laser receiver (5); When a negative calibration point is selected for measurement, the dedicated gauge block group (6) is arranged below the laser transmitter (2).

3. The device for calibrating the indication error of a laser level meter according to claim 2, characterized in that: The special gauge block group (6) is provided with eight special standard test blocks in total; The eight special standard test blocks are all arranged as cuboid structures with rectangular cross-sections. The upper and lower surfaces of each special standard test block are a pair of mutually parallel measuring surfaces.

4. The device for calibrating the indication error of a laser level meter according to claim 3, characterized in that: The heights of the eight special standard test blocks are set to 3.65mm, 7.30mm, 10.95mm, 14.60mm, 18.25mm, 21.90mm, 25.55mm, and 29.60mm respectively; The height of each of the special standard test blocks is set to be the height of the calibration point of the laser receiver (5).

5. The device for calibrating the indication error of a laser level meter according to claim 1, characterized in that: The processor (3) is configured as a mobile tablet computer.

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