A non-contact container elevation measurement and calculation device and method for nuclear power plants

Abstract

The present invention relates to the field of instrumentation and control technology, and specifically discloses a non-contact container elevation measurement and calculation device and method for a nuclear power plant. Among them, the laser ranging sensor A is used to measure the distance between the device and the full point of the object to be measured, and the angle adjustment knob is used to adjust the angle between the laser ranging sensor A and the horizontal ground; the laser ranging sensor B is used to measure the distance between the device and the horizontal zero point of the object to be measured; the actual height of the object to be measured can be calculated through the Pythagorean theorem of a right triangle. The present invention has the advantages of convenient operation, simple structure, and no need to actually contact the object to be measured, which can ensure that the operation and maintenance personnel can accurately measure the height of the object to be measured under conditions such as being unsuitable for close contact with the object to be measured and harsh on-site environments.

Description

Technical Field

[0001] The present invention belongs to the technical field of instrumentation and control, and particularly relates to a non-contact container elevation measurement and calculation device and method for nuclear power plants. Background Art

[0002] In most process systems of nuclear power plants, differential pressure transmitters are usually used as the liquid level monitoring means for containers such as liquid storage tanks. Its basic working principle is to use the differential pressure value sensed by the positive and negative pressure sides of the instrument to reflect the liquid level height in the container. However, due to factors such as the measurement environment, the type of medium, or the difference between the required liquid level height and the design value in actual on-site applications, the pressure on the positive pressure side of the instrument cannot directly and truly reflect the actual liquid level height in the container. Therefore, it is necessary to perform instrument range migration by measuring the relative heights of the container, the instrument installation position, etc. to improve the accuracy and reliability of the measurement data.

[0003] However, in the actual implementation process of instrument range migration, there is a problem of difficulty in measuring the relative height of the measured object. For example, the location of the container cannot be directly reached, or there is radioactivity in the container or the measurement environment, etc., which makes it impossible to directly use conventional contact measurement methods (for example, it is impossible to directly measure the distance between the highest point and the lowest point with a tape measure).

[0004] Therefore, there is an urgent need to design a non-contact container elevation measurement and calculation device and method to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a non-contact container elevation measurement and calculation device and method for nuclear power plants, which can complete height measurement without directly contacting the measured container and instrument, and assist maintenance personnel to accurately and quickly complete related work such as instrument range migration and height parameter calculation.

[0006] The technical solution of the present invention is as follows:

[0007] A non-contact container elevation measurement and calculation device for nuclear power plants includes a laser distance sensor A, a laser distance sensor B, a battery module, a power switch, a display module, a changeover switch, an angle adjustment knob, and a connecting cable;

[0008] The battery module supplies power to the laser distance sensor A, the laser distance sensor B, and the display module through the connecting cable, and the power switch is used to control the on-off of the power supply;

[0009] The laser distance sensor A is used to measure the distance between the device and the full point of the measured object, and the angle adjustment knob is used to adjust the angle between the laser distance sensor A and the horizontal ground;

[0010] The laser distance sensor B is used to measure the distance between the device and the horizontal zero point of the measured object;

[0011] The described display module is used to display the distance values measured by the laser distance sensor A and the laser distance sensor B;

[0012] The described changeover switch is used to switch the display module to display the distance values measured by the laser distance sensor A or the laser distance sensor B, and at the same time, it can also switch the battery module to supply power to the laser distance sensor A or the laser distance sensor B.

[0013] The described angle adjustment knob can realize the angle adjustment of the laser distance sensor A with respect to the horizontal plane from 0° to 90°.

[0014] The described laser distance sensor A and the laser distance sensor B are arranged adjacent to each other and can be regarded as emitting laser for distance measurement from the same point respectively.

[0015] The described laser distance sensor A, laser distance sensor B, battery module, power switch, display module, changeover switch, angle adjustment knob, and connection cable are all installed on the equipment bracket.

[0016] The described object to be measured is the liquid level in the container.

[0017] A non-contact container elevation measurement and calculation method for a nuclear power plant based on the described device, which measures the actual distances between the device and the horizontal zero point and full point of the object to be measured, and then calculates the actual height of the object to be measured through the Pythagorean theorem of a right triangle.

[0018] It includes the following steps:

[0019] S1: Place the entire device on the horizontal ground near the object to be measured, make the laser distance sensor A and the laser distance sensor B be on the same horizontal plane as the zero point of the object to be measured, turn on the power switch, and start supplying power to the device;

[0020] S2: Select the display mode of the laser distance sensor B on the changeover switch, and record the value X currently displayed on the display module;

[0021] S3: Select the display mode of the laser distance sensor A on the changeover switch, adjust the angle adjustment knob, align the laser distance sensor A with the full point position of the object to be measured, and record the value Y currently displayed on the display module;

[0022] S4: According to the Pythagorean theorem of a right triangle, substitute the values X and Y into the following formula:

[0023] The actual height H of the object to be measured = = ,

[0024] Thus, the actual height H of the object to be measured is calculated.

[0025] It is applicable to the conditions where it is not suitable to have close contact with the object to be measured or the measurement site environment is harsh.

[0026] The remarkable effects of the present invention are as follows:

[0027] The present invention uses laser ranging means to measure the actual distances between the lowest point (zero point) and the highest point (full point) of the object to be measured and the device. Then, through the Pythagorean theorem of a right triangle, the actual height of the object to be measured is calculated. It has the advantages of convenient operation, simple structure, and no need for actual contact with the object to be measured. It can ensure that the operation and maintenance personnel can accurately measure the height of the object to be measured under the conditions where it is not suitable to have close contact with the object to be measured and the on-site environment is harsh, assist in completing the calculation work of instrument range migration, reduce the risks of industrial injuries, nuclear radiation, etc. suffered by personnel on-site, and solve the problem that the height parameters cannot be directly measured due to reasons such as the object to be measured being too high and inaccessible. The specific advantages compared with the prior art are as follows:

[0028] (1) Adopt a non-contact measurement method, which is not affected by environmental conditions;

[0029] (2) It is convenient to use, simple to operate, and the principle is easy to understand. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is the circuit schematic diagram of the device of the present invention;

[0031] Figure 2 It is the schematic diagram of the use of the device of the present invention.

[0032] In the figure: 1. Laser ranging sensor A; 2. Laser ranging sensor B; 3. Battery module; 4. Power switch; 5. Display module; 6. Toggle switch; 7. Device; 8. Object to be measured. DETAILED DESCRIPTION OF THE INVENTION

[0033] The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0034] As Figure 1 、 2 shown, a non-contact container elevation measurement and calculation device (7) for nuclear power plants includes a laser ranging sensor A (1), a laser ranging sensor B (2), a battery module (3), a power switch (4), a display module (5), a toggle switch (6), an angle adjustment knob, an equipment bracket, and connection cables.

[0035] The battery module (3) supplies power to the laser ranging sensor A (1), the laser ranging sensor B (2), and the display module (5) through connection cables, and the power switch (4) is used to control the on-off of the power supply.

[0036] The described laser distance measurement sensor A(1) is used to measure the distance between the measuring device(7) and the full point of the object to be measured(8). The angle adjustment knob is used to adjust the angle between the laser distance measurement sensor A(1) and the horizontal ground, enabling the angle adjustment of the laser distance measurement sensor A(1) from parallel to the ground(0°) to perpendicular to the ground(90°). The described laser distance measurement sensor B(2) is used to measure the distance between the measuring device(7) and the horizontal zero point of the object to be measured(8).

[0037] The described display module(5) is used to display the distance values measured by the laser distance measurement sensor A(1) and the laser distance measurement sensor B(2). The switching switch(6) is used to switch the display module(5) to display the distance values measured by the laser distance measurement sensor A(1) or the laser distance measurement sensor B(2), and at the same time, it can also switch the battery module(3) to supply power to the laser distance measurement sensor A(1) or the laser distance measurement sensor B(2).

[0038] The described laser distance measurement sensor A(1), laser distance measurement sensor B(2), battery module(3), power switch(4), display module(5), switching switch(6), angle adjustment knob, and connecting cable are all installed on the equipment bracket(8). The laser distance measurement sensor A(1) and the laser distance measurement sensor B(2) are arranged adjacent to each other and can be regarded as emitting laser distance measurements from the same point respectively.

[0039] The object to be measured(8) is the liquid level in containers such as liquid storage tanks and boxes.

[0040] A non-contact container elevation measurement and calculation method for nuclear power plants, which is operated using the above device(7), includes the following steps:

[0041] S1: Place the entire device(7) on the horizontal ground near the object to be measured(8), so that the laser distance measurement sensor A(1) and the laser distance measurement sensor B(2) are at the same horizontal plane as the zero point of the object to be measured(8), turn on the power switch(4), and start supplying power to the device;

[0042] S2: Select the laser distance measurement sensor B(2) display mode on the switching switch(6), and record the value X currently displayed on the display module(5), which is the distance between the device(7) and the zero point of the object to be measured(8), that is, the distance between the device(7) and the zero point of the liquid level in the container;

[0043] S3: Select the laser distance measurement sensor A(1) display mode on the switching switch(6), adjust the angle adjustment knob, align the laser distance measurement sensor A(1) with the full point position of the object to be measured(8), and record the value Y currently displayed on the display module(5), which is the distance between the device(7) and the full point of the object to be measured(8), that is, the distance between the device(7) and the highest point of the liquid level in the container;

[0044] S4: According to the Pythagorean theorem of a right triangle, substitute the values of X and Y into the following formula:

[0045] The actual height H of the object to be measured = = ,

[0046] Thus, the object to be measured (8), that is, the actual height H of the liquid level in the container to be measured, is calculated.

[0047] The present invention uses laser ranging means to measure the actual distances between the lowest point (zero point) and the highest point (full point) of the object to be measured and the device, and then calculates the actual height of the object to be measured through the Pythagorean theorem of a right triangle. It has the advantages of convenient operation, simple structure, and no need to actually contact the object to be measured. It can ensure that the maintenance personnel can accurately measure the height of the object to be measured under conditions such as being not suitable for close contact with the object to be measured and the harsh on-site environment, assist in completing the instrument range migration calculation work, reduce the risks of industrial injuries, nuclear radiation, etc. suffered by personnel on-site, and solve the problem that the height parameter cannot be directly measured due to reasons such as the object to be measured being too high and inaccessible.

[0048] The above shows and describes the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to include all changes falling within the meaning and scope of the equivalent elements of the claims in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A non-contact container elevation measurement and calculation method for nuclear power plants, characterized in that: Measurement and calculation are carried out using a non-contact container elevation measurement and calculation device for nuclear power plants; the device includes a laser distance measurement sensor A (1), a laser distance measurement sensor B (2), a battery module (3), a power switch (4), a display module (5), a changeover switch (6), an angle adjustment knob, and connecting cables; The battery module (3) supplies power to the laser distance measurement sensor A (1), the laser distance measurement sensor B (2), and the display module (5) through the connecting cables, and the power switch (4) is used to control the on / off of the power supply; The laser distance measurement sensor A (1) is used to measure the distance between the device (7) and the full point of the object to be measured (8), and the angle adjustment knob is used to adjust the angle between the laser distance measurement sensor A (1) and the horizontal ground; The laser distance measurement sensor B (2) is used to measure the distance between the device (7) and the horizontal zero point of the object to be measured (8); The display module (5) is used to display the distance values measured by the laser distance measurement sensor A (1) and the laser distance measurement sensor B (2); The changeover switch (6) is used to switch the display module (5) to display the distance value measured by the laser distance measurement sensor A (1) or the laser distance measurement sensor B (2), and at the same time, it can also switch the battery module (3) to supply power to the laser distance measurement sensor A (1) or the laser distance measurement sensor B (2); The method includes: measuring the actual distances between the device (7) and the horizontal zero point and the full point of the object to be measured (8), and then calculating the actual height of the object to be measured (8) through the Pythagorean theorem of a right triangle.

2. The non-contact container elevation measurement and calculation method for a nuclear power plant according to claim 1, characterized in that: It includes the following steps: S1: Place the entire device (7) on the horizontal ground near the object to be measured (8), so that the laser distance measurement sensor A (1) and the laser distance measurement sensor B (2) are on the same horizontal plane as the zero point of the object to be measured (8), turn on the power switch (4), and start the power supply of the device; S2: Select the laser distance measurement sensor B (2) display mode on the changeover switch (6), and record the current value X displayed on the display module (5); S3: Select the laser distance measurement sensor A (1) display mode on the changeover switch (6), adjust the angle adjustment knob, align the laser distance measurement sensor A (1) with the full point position of the object to be measured (8), and record the current value Y displayed on the display module (5); S4: According to the Pythagorean theorem of a right triangle, substitute the values X and Y into the following formula: The actual height H of the object under test = = , Thus, the actual height H of the object to be measured (8) is calculated.

3. The non-contact container elevation measurement and calculation method for a nuclear power plant according to claim 2, wherein: It is applicable to conditions where it is not suitable to be in close contact with the object to be measured (8) or the measurement site environment is harsh.

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