Laser calibration instrument and calibration method thereof

Abstract

The present invention relates to a laser calibrator and a calibration method thereof, and belongs to the technical field of measuring instruments. The calibrator comprises a handheld housing with a distance measurement display screen on the surface, and a vertical positioning device is provided on one side of the housing. A laser rangefinder containing an intelligent control unit is installed in the housing, and the corresponding input ports of the intelligent control unit are respectively connected to the setting signal output end of the operation panel and the distance measurement signal output end of the laser rangefinder, and the digital display output end and the indication output end of the intelligent control unit are respectively connected to the distance measurement display screen and each light-emitting device; the intelligent control unit contains a judgment setting module, a basic judgment module, a forward indication module, a reverse indication module, and an accurate indication module for completing the height position calibration. The present invention can not only use the magnetic suction mechanical clamping and positioning to free up hands to make corresponding marks, which is fast and convenient; but also can select the setting method of the target distance, prompt the deviation direction, and has the characteristics of intelligence and humanity.

Description

Technical Field

[0001] The invention relates to a distance measuring instrument, in particular to a laser calibrator, and also to a calibration method thereof, belonging to the technical field of measuring instruments. Background Art

[0002] As we all know, many engineering occasions require the rapid and accurate measurement of distances and calibration. For example, when suspending and installing pipes on the top of a building or between columns, in order to keep the pipes level or in the designed direction, the height of the pipe placement boom needs to be calibrated.

[0003] Although laser distance measurement technology is very mature (see Chinese patent document with application number 201310319373.0), it always needs to be operated by hand when in use, which is often not convenient. A search shows that Chinese patent document with application number 201820169676.7 discloses a laser distance meter with a bracket, including a shell and a bracket. An iron sheet is provided on the back of the shell, and a magnet is provided on the upper end of the bracket. The iron sheet on the back of the shell is adsorbed by the magnet to fix the laser distance meter on the bracket. The distance is measured by fixing the distance meter with the bracket, which avoids the jitter of the handheld laser distance meter when measuring the distance and causing a large measurement error. In addition, a lighting lamp is provided at the front end of the laser distance meter to observe the situation in front of the measurement direction. However, this prior art is obviously not suitable for height position calibration on pipeline booms. Summary of the invention

[0004] The purpose of the present invention is to provide a laser calibrator suitable for calibrating the height position on a hanger, and at the same time provide a calibration method thereof, thereby bringing convenience to projects such as pipeline suspension installation.

[0005] In order to achieve the above purpose, the basic technical scheme of the laser calibration instrument of the present invention is: comprising a handheld housing with a distance measurement display screen and an operation panel on the surface, the housing is equipped with a group of light emitting devices distributed in the instrument length (i.e., the distance between the light emitting devices at both ends) with the middle as the reference, and one side is provided with a vertical positioning device;

[0006] The housing contains a laser rangefinder including an intelligent control unit and a power supply battery. The corresponding input ports of the intelligent control unit are respectively connected to the setting signal output terminal of the operation panel and the ranging signal output terminal of the laser rangefinder. The digital display output terminal and the indication output terminal of the intelligent control unit are respectively connected to the ranging display screen and each light-emitting device. The intelligent control unit contains the following modules for completing the height position calibration:

[0007] Judgment setting module: used to judge whether to use the actual measured value as the target distance according to the input setting signal after it is turned on; if so, the real-time distance measurement signal of the laser rangefinder is received and stored, and the basic judgment module is started; if not, the input setting value is received and stored, and the basic judgment module is started;

[0008] Basic judgment module: after receiving the ranging signal of the laser rangefinder, it is used to judge whether the difference with the stored target distance exceeds the forward direction, exceeds the reverse direction or falls within the instrument length range; if it exceeds the forward direction, the forward indication module is restarted; if it exceeds the reverse direction, the reverse indication module is restarted; if it falls within the instrument length range, the accurate indication module is restarted;

[0009] Positive indication module - used to control the light-emitting device above the reference to flash and restart the basic judgment module;

[0010] Reverse indication module - used to control the light-emitting device under the reference to flash and restart the basic judgment module;

[0011] Accurate indication module: used to control the light-emitting device corresponding to the target distance to complete the calibration.

[0012] A further improvement of the laser calibration instrument of the present invention is that the vertical positioning device is a magnetic attraction strip, and the magnetic attraction strip is composed of a magnetic strip or a magnetic metal strip combined with a magnetic part.

[0013] A further improvement of the laser calibrator of the present invention is that the shell is composed of a front cover and a rear cover that are matched; the lower part of the front cover has a window for installing a distance measurement display screen, and one side of the front cover has light-transmitting windows that are spaced apart at upper and lower intervals.

[0014] A further improvement of the laser calibrator of the present invention is that a magnetic metal strip is clamped on the side of the shell adjacent to the light-transmitting window, the inner surface of the magnetic metal strip is in contact with a rectangular magnetic steel, and the rectangular magnetic steel is clamped between two magnetic blocks fixed in the shell, and the outer ends of the two magnetic blocks are respectively clamped in the two side notches in the middle of the magnetic metal strip.

[0015] A further improvement of the laser calibrator of the present invention is that the light-emitting device is an LED lamp arranged on an LED board, and the LED board is lined in a light-transmitting strip located on one side of the front cover, and light-transmitting protrusions corresponding to the positions of each LED lamp are distributed at intervals on the strip-shaped body of the light-transmitting strip, and each light-transmitting protrusion is respectively embedded in the light-transmitting window of the front cover.

[0016] The calibration method of the laser calibration instrument of the present invention is as follows: the intelligent control unit completes the height position calibration according to the following steps:

[0017] Basic judgment steps: after receiving the ranging signal of the laser rangefinder, judge whether the difference with the stored target distance exceeds the positive direction, exceeds the reverse direction or falls within the instrument length range; if it exceeds the positive direction, perform the positive indication step; if it exceeds the reverse direction, perform the reverse indication step; if it falls within the instrument length range, perform the accurate indication step;

[0018] Positive indication step: controlling the light emitting device above the reference to flash and returning to the basic judgment step;

[0019] Reverse indication step: the light emitting device under the control reference flashes and returns to the basic judgment step;

[0020] Accurate indication steps: control the light-emitting device corresponding to the target distance to emit light and complete the calibration.

[0021] The calibration method of the laser calibrator of the present invention is further improved in that the basic judgment step is preceded by: a judgment setting step - after being turned on, judging whether to use the actual measured value as the target distance according to the input setting signal; if so, receiving the real-time ranging signal of the laser rangefinder and storing it, and performing the basic judgment step; if not, receiving the input setting value and storing it, and performing the basic judgment step.

[0022] The calibration method of the laser calibrator of the present invention is further improved in that, in the forward indication step, the flashing frequency of the light emitting device slows down and decreases and speeds up as the forward excess increases; in the reverse indication step, the flashing frequency of the light emitting device slows down and decreases and speeds up as the reverse excess increases.

[0023] When the present invention is used to perform operations such as calibrating the height on a metal hanger, as needed, first input the target distance to be calibrated digitally, or place the laser calibrator at an appropriate height and measure and store the distance as the target distance to be calibrated; then, just move the magnetic strip or mechanical clamping device up and down against the surface of the hanger; the laser calibrator can flash the light-emitting device at the upper or lower part of the instrument length range to indicate whether the current position of the laser calibrator is lower or higher than the target distance, thereby guiding the adjustment of the moving direction until the height is further adjusted so that the target distance falls within the instrument length range of the laser calibrator; finally, the light-emitting device within the instrument length range corresponding to the target distance emits light to indicate the correct target distance position, thereby guiding the making of height marks along this indicated position, which serves as a reference for subsequent construction operations such as suspending and installing pipelines.

[0024] It can be seen that the present invention can not only use magnetic mechanical clamping to position when the reading on the distance measurement display screen reaches the calibration height, freeing up hands to make corresponding marks, thereby quickly and conveniently laying the foundation for subsequent engineering operations such as pipeline suspension installation; but also can select the setting method of the target distance (usually the target height) to prompt the deviation direction of the current height of the laser calibrator from the target height, and has the characteristics of intelligence and humanity. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below in conjunction with the accompanying drawings.

[0026] Figure 1 It is a schematic diagram of the three-dimensional decomposition structure of the preferred embodiment 1 of the present invention.

[0027] Figure 2 yes Figure 1 Schematic diagram of the three-dimensional structure after assembly of the embodiment.

[0028] Figure 3 yes Figure 1 A schematic diagram of the three-dimensional structure of the embodiment after assembly from another viewing angle.

[0029] Figure 4 yes Figure 1 A circuit block diagram of an intelligent control unit of an embodiment.

[0030] Figure 5 yes Figure 1 Logic block diagram of the control process of the intelligent control unit of an embodiment.

[0031] In the figure: laser rangefinder 1, LDE board 2, light-transmitting strip 3, ranging display screen 4, front cover 5, back cover 6, battery cavity cover 7, operation panel 8, magnet 9, magnetic block 10, stainless steel strip 11, battery terminal 12, battery 13, screw 14. DETAILED DESCRIPTION

[0032] Embodiment 1

[0033] The laser calibration instrument of this embodiment is as follows Figure 1 , 2 As shown in Figures 3 and 4, the front cover 5 and the rear cover 6 are combined to form a handheld housing that is easy to hold. The lower window 5-1 of the front cover 5 is used to install the distance measurement display screen 4 for easy observation. The light-transmitting windows 5-2 spaced apart at the upper and lower sides of one side of the front cover 5 are used to embed the light-transmitting strip 3, which can visually indicate whether the calibrated height is reached or approached. The outer surface of the front cover 5 is attached with an operation panel 8 for inputting information.

[0034] The upper part of the housing is provided with a battery 13 located between the upper and lower battery terminals 12 for providing electric energy. The rear cover 6 is provided with a battery cavity cover 7 at the battery position. The lower part of the housing is provided with a laser rangefinder 1 containing an intelligent control unit, and the operation panel 8 is electrically connected to the control input terminal of the control unit, and the prompt output terminal of the control unit is connected to an LED board 2 with nine LED lights (a, b, c, d, e, f, g, h, i from bottom to top) distributed at intervals above and below. Therefore, when using a laser calibrator, the laser rangefinder 1 can clearly indicate whether the set height is reached or approached by means of LED lights after comparing the measured height parameter with the input set height. For example, when the middle LED light with a larger specification or a unique light color is on, it indicates that the set height has been reached, and when the upper or lower LED light is on, it indicates various situations close to the set height; or, when the set height falls within the height range of the laser calibrator, the LED light corresponding to the set height is on, thereby clearly indicating the actual position of the set height for calibration operation.

[0035] The LED board 2 is lined in the light-transmitting strip 3 located on one side of the front cover 5. Light-transmitting protrusions 3-2 corresponding to the positions of the LED lamps are arranged at intervals on the strip-shaped body 3-1 of the light-transmitting strip 3, and each light-transmitting protrusion 3-2 is respectively embedded in each light-transmitting window 5-2 of the front cover 5. This can protect the LED lamp and provide clear indication.

[0036] A magnetic stainless steel bar 11 is clamped on the side of the housing adjacent to the light-transmitting window 5-2. The inner surface of the stainless steel bar 11 is in contact with the rectangular magnetic steel 9. The magnetic steel 9 is clamped between two magnetic blocks 10 fixed in the housing. The outer ends of the two magnetic blocks 10 are respectively clamped in the concave notches on both sides of the middle of the stainless steel bar 11. Therefore, the stainless steel bar 11 is not only reliably fixed, but also can produce a magnetic effect. When in use, it can be attached to the surface of the metal suspension rod and moved up and down. The stainless steel bar can prevent the plastic housing from being worn. Once it reaches the set height, it can be magnetically positioned by itself so that corresponding markings can be made.

[0037] The circuit structure of the intelligent control unit of this embodiment is shown in Figure 4The microprocessor MCU (ATMEL-MEGA-328PMU) is the core device. The power and setting button (Power / Setting Button) in the middle of the operation panel and the setting signal output terminals of the increase and decrease buttons (Plus Button, Minus Button) on the upper part are respectively connected to the corresponding input ports PD3 (1), PD2 (32), and PD4 (42) of the MCU. The distance sensor's distance signal output is connected to the MCU's distance signal input PD0 (RXD30) terminal and is controlled to start and stop. The battery (Battery) supplies power to the MCU's power supply terminal through a conventional power supply circuit (Powersupply circuit). The MCU's digital display output terminal PC3 (26) is connected to the display screen (LCD), the indication output terminals PC1 (24) - PB6 (7) are respectively connected to the LED lights, and the warning output terminal PC2 (25) is connected to the buzzer (Buzzer).

[0038] When calibrated with a laser calibrator, a typical measurement and control process of the intelligent control unit is as follows: Figure 5 As shown, the basic steps are as follows

[0039] Step 1, power-on control step - after the MCU is enabled, determine the trigger button time. If the duration is greater than 1 second, initialize it and determine whether the duration is greater than 2 seconds; if not, proceed to the next step; if the duration is shorter than 1 second or longer than 2 seconds, proceed to step 8;

[0040] Step 2, judging the setting step - judging whether to use the actual measured value as the target distance according to the setting signal input from the operation panel; if so, receiving the real-time distance measurement signal of the laser rangefinder and storing it as the target distance, and excluding the shutdown and resetting the target distance, proceeding to step 3; if not, receiving the set value input by the increase and decrease keys and storing it as the target distance, and excluding the shutdown and resetting the target distance, proceeding to step 3;

[0041] Step 3, basic judgment steps - after receiving the ranging signal of the laser rangefinder, judge whether the difference with the stored target distance exceeds the positive direction, exceeds the negative direction, or falls within the range H of the distance between the two end LEDs (referred to as the instrument length); if it exceeds the positive direction, proceed to step 4; if it exceeds the negative direction, proceed to step 5; if it falls within the instrument length range, proceed to step 6;

[0042] Step 4, positive indication step - control the LED lights f, g, h, i above the middle reference e to flash, and the flashing frequency slows down as the positive excess increases, and speeds up as it decreases, and returns to step 3;

[0043] Step 5, reverse indication step - control the LED lights a, b, c, d under the reference e to flash, and the flashing frequency slows down and decreases and speeds up as the reverse excess increases, and returns to step 3;

[0044] Step 6: Accurate indication step - control the LED light corresponding to the target distance and proceed to step 7;

[0045] Step 7, warning control step - verify and judge whether the measured distance is equal to the target distance, and use different beep sounds to verify the judgment result as appropriate, and proceed to step 8;

[0046] Step 8. Shutdown and end steps - stop measuring, turn off LCD\LED\buzzer, store current target distance, turn off power, and end.

[0047] When calibrating the height on a metal boom, after selecting and setting the target height, move the magnetic strip up and down against the surface of the boom, and adjust the position of the laser calibrator as appropriate according to the LED indication and the buzzer warning. When the distance measurement reaches the target height (target distance), the magnetic positioning can be used to free up hands to make corresponding marks, thus laying the foundation for subsequent pipeline suspension installation engineering operations very conveniently. Compared with the prior art, the laser calibrator of this embodiment has the following significant advantages:

[0048] 1) When using a convex tape measure to measure the height from the ground, the user needs to stretch and tighten it by hand. Using the laser calibration instrument of the present invention, the user can save work and time and measure more quickly.

[0049] 2) When using an ordinary laser rangefinder for measurement, the user needs to read the numbers and need to calculate in which direction the target position is, and then adjust the position of the laser rangefinder until the displayed value reaches the target position.

[0050] 3) By using the laser calibration instrument of the present invention, the user can easily determine the direction that needs to be adjusted through the LED display or the buzzer prompt, and when the measured height is close to a certain range, the user does not need to make fine adjustments.

[0051] 4) After the measurement is completed, the user can attach the laser calibrator to the column through a magnet to complete the calibration with both hands free.

[0052] In addition to the above embodiments, the present invention may also have other implementations. For example, the specific measurement and control process of the intelligent control unit can be further refined or evolved according to the above process; in addition to the stainless steel strip that is bonded to the magnetic steel, the magnetic steel strip can also be directly used as the magnetic strip; for example, in addition to the LED and other indicators indicating whether the set height (i.e., the target distance) has been reached, the actual measured height reached can also be prompted by voice; for example, when inputting the setting information, the set height value can be entered, or the initial positioning height can be used as the set height; and so on.

[0053] Any technical solutions formed by equivalent replacement or equivalent transformation shall fall within the protection scope required by the present invention.

Claims

1. A laser calibration instrument, comprising a handheld housing with a distance measurement display screen and an operation panel on the surface, characterized in that: The housing is provided with a group of light emitting devices which are distributed in the instrument length range at intervals up and down based on the middle as the reference, and one side is provided with a vertical positioning device; The housing contains a laser rangefinder including an intelligent control unit and a power supply battery. The corresponding input ports of the intelligent control unit are respectively connected to the setting signal output terminal of the operation panel and the ranging signal output terminal of the laser rangefinder. The digital display output terminal and the indication output terminal of the intelligent control unit are respectively connected to the ranging display screen and each light-emitting device. The intelligent control unit contains the following modules for completing the height position calibration: Judgment setting module: used to judge whether to use the actual measured value as the target distance according to the input setting signal after it is turned on; if so, the real-time distance measurement signal of the laser rangefinder is received and stored, and the basic judgment module is started; if not, the input setting value is received and stored, and the basic judgment module is started; Basic judgment module: after receiving the ranging signal of the laser rangefinder, it is used to judge whether the difference with the stored target distance exceeds the forward direction, exceeds the reverse direction or falls within the instrument length range; if it exceeds the forward direction, the forward indication module is restarted; if it exceeds the reverse direction, the reverse indication module is restarted; if it falls within the instrument length range, the accurate indication module is restarted; Positive indication module - used to control the light-emitting device above the reference to flash and restart the basic judgment module; Reverse indication module - used to control the light-emitting device under the reference to flash and restart the basic judgment module; Accurate indication module: used to control the light-emitting device corresponding to the target distance to complete the calibration; The vertical positioning device is a magnetic strip, which is composed of a magnetic strip or a magnetic metal strip combined with a magnetic member; The housing is composed of a front cover and a rear cover that are matched together; the lower part of the front cover has a window for installing a distance measurement display screen, and one side of the front cover has light-transmitting windows that are spaced apart at upper and lower intervals; A magnetic conductive metal strip is clamped on the side of the housing adjacent to the light-transmitting window, the inner surface of the magnetic conductive metal strip is in contact with a rectangular magnetic steel, the rectangular magnetic steel is clamped between two magnetic conductive blocks fixed in the housing, and the outer ends of the two magnetic conductive blocks are respectively clamped in the two side notches in the middle of the magnetic conductive metal strip; The light emitting device is an LED lamp arranged on an LED board, and the LED board is lined in a light-transmitting strip located on one side of the front cover. Light-transmitting protrusions corresponding to the positions of the LED lamps are distributed at intervals on the strip-shaped body of the light-transmitting strip, and each light-transmitting protrusion is respectively embedded in the light-transmitting window of the front cover.

2. A calibration method for a laser calibration instrument according to claim 1, characterized in that: The intelligent control unit completes the height position calibration according to the following steps Basic judgment steps: after receiving the ranging signal of the laser rangefinder, judge whether the difference with the stored target distance exceeds the positive direction, exceeds the reverse direction or falls within the instrument length range; if it exceeds the positive direction, perform the positive indication step; if it exceeds the reverse direction, perform the reverse indication step; if it falls within the instrument length range, perform the accurate indication step; Positive indication step: controlling the light emitting device above the reference to flash and returning to the basic judgment step; Reverse indication step: the light emitting device under the control reference flashes and returns to the basic judgment step; Accurate indication steps: control the light-emitting device corresponding to the target distance to emit light and complete the calibration.

3. The calibration method of the laser calibration instrument according to claim 2, characterized in that The basic judgment step also includes: Judgment setting steps - after turning on, judge whether to use the actual measured value as the target distance according to the input setting signal; if so, receive the real-time distance measurement signal of the laser rangefinder and store it, and perform basic judgment steps; if not, receive the input setting value and store it, and perform basic judgment steps.

4. The calibration method of the laser calibration instrument according to claim 3, characterized in that: In the forward indication step, the flashing frequency of the light emitting device slows down and decreases and speeds up as the forward excess increases; in the reverse indication step, the flashing frequency of the light emitting device slows down and decreases and speeds up as the reverse excess increases.

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