CN115839661A - Linear grating ruler based upper and lower double-laser precise distance measurement calibration method, system and platform - Google Patents
Linear grating ruler based upper and lower double-laser precise distance measurement calibration method, system and platform Download PDFInfo
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Abstract
The invention belongs to the technical field of laser measurement, and particularly relates to an upper and lower double-laser precision distance measurement calibration method, system and platform based on a linear grating ruler. According to the method, the relative movement distance of the linear grating ruler is calculated in real time according to the laser carried by the linear grating ruler; calculating in real time to generate relative deviation fixed interval calibration data of the double lasers by combining the timing and comparison functions of the computer; through the relative movement distance of the linear grating ruler and the relative deviation fixed interval calibration data of the double lasers, the high-precision measurement operation of the upper and lower double lasers in the super laser range in real time and the system and the platform corresponding to the method can solve the problems of the distance measurement affected by the laser range and poor compatibility in the conventional double laser measurement combining the linear grating ruler; and the problem that the laser carrying shaft structure is influenced by temperature, so that the measuring result is influenced by expansion with heat and contraction with cold is solved.
Description
Technical Field
The invention belongs to the technical field of laser measurement, and particularly relates to an upper and lower double-laser precision distance measurement calibration method, system and platform based on a linear grating ruler.
Background
At present, conventional single-laser and double-laser precise ranging are limited by the measuring range of laser, and when the selected laser range is large, the laser resolution is reduced, so that the compatibility with the precision requirement is poor. Especially, the method can not meet the measurement requirement by measuring objects with high precision below 0.005 mm.
In addition, the double lasers combined with the linear grating ruler have expansion with heat and contraction with cold of a mechanical structure along with temperature difference because the lasers are carried on the movable shaft. The relative fixed deviation of the double lasers is changed along with the relative fixed deviation of the double lasers, and the accuracy of the measuring result is influenced.
Therefore, compatibility is poor for the above accuracy requirements; especially, the method is used for measuring objects with high precision below 0.005mm, and the method is far from meeting the measurement requirement, and therefore, the mechanical structure expands with heat and contracts with cold along with the temperature difference. The relative fixed deviation of the double lasers changes along with the change of the relative fixed deviation, and the accuracy of the measurement result is affected, so that the design and development of a calibration method, a calibration system and a calibration platform for precise distance measurement based on the upper laser and the lower laser of a linear grating ruler are urgently needed.
Disclosure of Invention
The compatibility is poor aiming at the precision requirement; especially, the method is used for measuring objects with high precision below 0.005mm, and the method is far from meeting the measurement requirement, and therefore, the mechanical structure expands with heat and contracts with cold along with the temperature difference. The invention provides a calibration method, a calibration system and a calibration platform for precise distance measurement based on upper and lower double lasers of a linear grating ruler.
Specifically, the method comprises the following steps:
the invention aims to provide an upper and lower double-laser precise distance measurement calibration method based on a linear grating ruler;
the second purpose of the invention is to provide an upper and lower double-laser precise distance measurement calibration system based on a linear grating ruler;
the third purpose of the invention is to provide a calibration platform for precise distance measurement based on upper and lower double lasers of a linear grating ruler;
the first object of the present invention is achieved by: the method specifically comprises the following steps:
calculating the relative movement distance of the linear grating ruler in real time according to the laser carried by the linear grating ruler;
calculating and generating relative deviation fixed interval calibration data of the double lasers in real time by combining timing and comparison functions of a computer;
and (3) calibrating data at fixed intervals by the relative movement distance of the linear grating ruler and the relative deviation of the double lasers, and performing real-time high-precision measurement operation of the upper and lower double lasers in a super laser range.
Further, the step of calculating the relative movement distance of the linear grating ruler in real time according to the laser carried by the linear grating ruler further comprises the following steps:
carrying the upper laser on a moving vertical shaft; and the lower laser is fixed on the platform.
Further, the step of calculating the relative movement distance of the linear grating ruler in real time according to the laser carried by the linear grating ruler further comprises the following steps:
and measuring the object in the stroke of the longitudinal shaft by moving the longitudinal shaft through the laser of the instrument.
Further, the laser of the instrument is a laser with a use range of 1 mm.
Furthermore, the upper and lower double lasers are respectively carried on different structural bodies.
Furthermore, the steps, together with the timing and comparing functions of the computer, calculate and generate the relative deviation fixed interval calibration data of the double lasers in real time, further include the following steps:
and increasing the relative deviation value of the generated dynamic calibration upper and lower double lasers in real time.
The second object of the present invention is achieved by: the system specifically comprises:
the first generation unit is used for calculating and generating the relative movement distance of the linear grating ruler in real time according to the laser carried by the linear grating ruler;
the second generation unit is used for calculating and generating the relative deviation fixed interval calibration data of the double lasers in real time by combining the timing and comparison functions of the computer;
and the measuring unit is used for calibrating data at fixed intervals through the relative movement distance of the linear grating ruler and the relative deviation of the double lasers, and performing real-time high-precision measurement operation of the upper and lower double lasers in a super laser range.
Further, in the first generation unit, there are further provided:
the carrying and fixing module is used for carrying the upper laser on the movable longitudinal shaft; fixing the lower laser on the platform;
and the measuring module is used for measuring the object in the longitudinal axis stroke by moving the longitudinal axis through the laser of the instrument.
Further, the second generation unit is further provided with:
and the dynamic calibration module is used for increasing the relative deviation value of the generated dynamic calibration upper laser and the dynamic calibration lower laser in real time.
The third object of the present invention is achieved by: the method comprises the following steps: the system comprises a processor, a memory and a linear grating ruler-based upper and lower double-laser precision distance measurement calibration platform control program;
the processor executes the linear grating ruler based upper and lower double-laser precision distance measurement calibration platform control program, the linear grating ruler based upper and lower double-laser precision distance measurement calibration platform control program is stored in the memory, and the linear grating ruler based upper and lower double-laser precision distance measurement calibration platform control program realizes the linear grating ruler based upper and lower double-laser precision distance measurement calibration method steps.
According to the method, the relative movement distance of the linear grating ruler is calculated in real time according to the laser carried by the linear grating ruler; calculating in real time to generate relative deviation fixed interval calibration data of the double lasers by combining the timing and comparison functions of the computer; through the relative movement distance of the linear grating ruler and the relative deviation fixed interval calibration data of the double lasers, the high-precision measurement operation of the upper and lower double laser super laser ranges in real time, and the system and the platform corresponding to the method, the scheme can solve the problems of the distance measurement affected by the laser ranges and poor compatibility in the conventional double laser measurement combining the linear grating ruler; and the problem that the laser carrying shaft structure is influenced by temperature, so that the measuring result is influenced by expansion with heat and contraction with cold is solved.
That is to say, through this scheme can realize that the dual laser tradition measures restriction and laser range, then can't measure when measuring object and surpassing the laser range. The distance object exceeding the laser range can be measured by combining a linear grating ruler; meanwhile, the dynamic calibration method of the relative offset of the double-laser combined linear grating ruler can solve the problem of inaccurate measurement result caused by the influence of temperature on a mechanical structure.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic flow chart of an up-down dual-laser precision distance measurement calibration method based on a linear grating scale according to the present invention;
FIG. 2 is a schematic diagram of an upper and lower dual-laser precision distance measurement calibration system architecture based on a linear grating scale according to the present invention;
FIG. 3 is a schematic diagram of an upper and lower dual-laser precision distance measurement calibration platform structure based on a linear grating scale according to the present invention;
FIG. 4 is a block diagram of a computer-readable storage medium according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a measuring instrument for measuring thickness and distance according to an embodiment of the present invention, which combines an upper laser and a lower laser with a linear grating ruler, based on the upper and lower double laser precise distance measurement calibration of the linear grating ruler;
in the figure: 1-moving the Z-axis; 2-grating ruler; 3-laser mechanism; 4-lower laser mechanism;
the objects, features and advantages of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
For better understanding of the objects, aspects and advantages of the present invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings, and other advantages and capabilities of the present invention will become apparent to those skilled in the art from the description.
The invention is capable of other and different embodiments and its several details are capable of modification in various other respects, all without departing from the spirit and scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. Secondly, technical solutions between the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should be considered to be absent and not be within the protection scope of the present invention.
Preferably, the linear grating ruler based up-down double-laser precision ranging calibration method is applied to one or more terminals or servers. The terminal is a device capable of automatically performing numerical calculation and/or information processing according to a preset or stored instruction, and the hardware includes, but is not limited to, a microprocessor, an Application Specific Integrated Circuit (ASIC), a Programmable Gate Array (FPGA), a Digital Signal Processor (DSP), an embedded device, and the like.
The terminal can be a desktop computer, a notebook, a palm computer, a cloud server and other computing equipment. The terminal can be in man-machine interaction with a client in a keyboard mode, a mouse mode, a remote controller mode, a touch panel mode or a voice control device mode.
The invention discloses a linear grating ruler based upper and lower double-laser precise distance measurement calibration method, a system, a platform and a storage medium.
As shown in fig. 1, the present invention provides a flow chart of a calibration method for precise distance measurement based on dual lasers of a linear grating scale.
In this embodiment, the linear grating ruler-based up-down dual-laser precise ranging calibration method can be applied to a terminal with a display function or a fixed terminal, and the terminal is not limited to a personal computer, a smart phone, a tablet personal computer, a desktop or all-in-one machine with a camera, and the like.
The linear grating ruler based up-down double-laser precise ranging calibration method can also be applied to a hardware environment formed by a terminal and a server connected with the terminal through a network. Networks include, but are not limited to: a wide area network, a metropolitan area network, or a local area network. The linear grating ruler-based up-down double-laser precision distance measurement calibration method can be executed by a server, a terminal or both.
For example, for a terminal that needs to perform calibration of dual laser precise distance measurement based on a linear grating scale, the calibration function based on dual laser precise distance measurement based on a linear grating scale provided by the method of the present invention can be directly integrated on the terminal, or a client for implementing the method of the present invention can be installed. For another example, the method provided by the present invention may further run on a device such as a server in the form of a Software Development Kit (SDK), and an interface based on the linear grating scale upper and lower dual laser precision distance measurement calibration function is provided in the form of an SDK, and a terminal or other devices may implement the linear grating scale upper and lower dual laser precision distance measurement calibration function through the provided interface.
The invention is further elucidated with reference to the drawing.
As shown in fig. 1, the invention provides an upper and lower dual-laser precise distance measurement calibration method based on a linear grating scale, which specifically comprises the following steps:
s1, calculating the relative movement distance of a linear grating ruler in real time according to laser carried by the linear grating ruler;
specifically, because the grating ruler and the upper and lower lasers are zero point counts based on factory calibration, a standard thickness gauge block is needed to be used for realizing association of the grating ruler, the upper and lower lasers; the relative movement distance is specifically calculated as follows: 1. and (3) the upper laser measurement result (L1) and the grating ruler (L2) of the movement axis are installed in the same direction of hardware, and the calculation result can obtain the measurement result of the upper laser based on the zero point of the grating ruler: lup = L1+ L2;2. and horizontally placing a standard gauge block (with the thickness of M) above the lower laser, adjusting the position of the upper laser and the lower laser at the moment to enable the upper laser and the lower laser to count effectively, wherein the upper laser is counted into Lup, the lower laser is counted into Ldown, and the relative movement distance X = Lup + Ldown-M can be obtained through the calculation result.
S2, calculating in real time to generate relative deviation fixed interval calibration data of the double lasers by combining timing and comparison functions of a computer;
specifically, in the embodiment of the present scheme: 1. after the S1 operation is completed, relative deviation fixed-interval calibration data can be obtained, meanwhile, the date and time of the perpetual calendar of the current computer can be obtained, and then R1 can be obtained, and the relative position of the S1 operation is recorded; 2. when the measurement is started, acquiring the existing date and time R2 of the perpetual calendar of the current computer again; 3. when R2-R1 is larger than the calibration interval time set by a user, the computer software automatically drives the measuring instrument to move to the relative position of S1 to execute calibration to obtain relative deviation fixed-interval calibration data, and meanwhile, the date and time of the perpetual calendar of the current computer are obtained and updated to R1;4. the computer software automatically and circularly executes 1-3 operations to realize the function of calculating and generating the relative deviation and the fixed distance of the double lasers in real time.
And S3, calibrating data at fixed intervals through the relative movement distance of the linear grating ruler and the relative deviation of the double lasers, and performing real-time high-precision measurement operation of the upper and lower double lasers in a super-laser range.
Specifically, in the embodiment of the present scheme: 1. when the requirement of measurement accuracy is higher, the laser range is smaller. The performance of a laser manufacturer is determined, and in order to realize the over-laser range, laser needs to be carried on a moving shaft of a movable high-precision grating ruler, so that the laser counting direction is consistent with the laser counting direction; 2. obtaining relative deviation fixed interval calibration data of the double lasers by the S2 method; 3. when the measurement is needed, the upper laser movement axis is moved, so that the double-laser digital display data is effective, and the thickness H = Lup + Ldown-X of the measured object can be calculated.
The step of calculating the relative movement distance of the linear grating ruler in real time according to the laser carried by the linear grating ruler further comprises the following steps:
s11, carrying the upper laser on a moving vertical shaft; and the lower laser is fixed on the platform.
The step of calculating the relative movement distance of the linear grating ruler in real time according to the laser carried by the linear grating ruler further comprises the following steps:
and S12, moving the longitudinal shaft through the laser of the instrument to realize the measurement of the object in the longitudinal shaft stroke.
The laser of the instrument is a laser with the use range of 1 mm.
The upper laser and the lower laser are respectively carried on different structural bodies.
The steps are combined with the timing and comparison functions of a computer, and relative deviation fixed interval calibration data of the double lasers is generated through real-time calculation, and the method further comprises the following steps:
and S21, increasing and generating a dynamic relative deviation value for calibrating the upper laser and the lower laser in real time.
Specifically, in the embodiment of the present invention, in order to avoid the limitation of the laser range, the laser at one end needs to be mounted on the linear grating scale capable of movably counting. When the distance is calculated, the relative movement distance of the linear grating ruler is added, and the accurate measurement result exceeding the laser range can be obtained. One end of the double laser is carried on the motion axis, so that the relative distance of the double lasers has dynamic deviation. Through a large amount of data experimental researches, the reason for causing the deviation is found to be caused by the fact that the fixed structure of the double laser is affected by external temperature to expand with heat and contract with cold. In order to solve the problem that the measurement is influenced by the external temperature, a set of calibration method for calculating the relative deviation of the double lasers before measurement at fixed intervals is designed. The method needs to use the timing and comparison functions of a computer, and when the set interval is smaller than the influence of the external temperature, the double-laser relative deviation calibration is started again. The upper and lower double laser ultra-laser range high-precision measurement can be realized by combining the steps.
In the embodiment of the invention, the measuring instrument for measuring the thickness and the distance is used for measuring the thickness and the distance by combining the upper laser and the lower laser with the linear grating ruler. The upper laser is carried on the movable Z shaft, and the lower laser is fixed on the platform. The laser of the instrument uses 1mm laser, and objects in the Z-axis stroke can be measured by moving the Z axis, so that the problem that the double laser ranges are limited by the laser range is completely solved. Meanwhile, the upper laser and the lower laser are carried on different structure bodies, so that different structures are easily influenced by temperature. For example, in autumn and winter, the expansion with heat and the contraction with cold of the steel structure with large temperature difference between day and night seriously affect the precision measurement result. At the moment, the relative deviation of the upper laser and the lower laser of the dynamic calibration is increased, so that the influence caused by expansion with heat and contraction with cold of the structure is compensated, and the precision is not influenced by the condition.
In order to achieve the above object, the present invention further provides an upper and lower dual-laser precision distance measurement calibration system based on a linear grating scale, as shown in fig. 2, the system specifically includes:
the first generation unit is used for calculating and generating the relative movement distance of the linear grating ruler in real time according to the laser carried by the linear grating ruler;
the second generation unit is used for calculating and generating the relative deviation fixed interval calibration data of the double lasers in real time by combining the timing and comparison functions of the computer;
and the measuring unit is used for calibrating data at fixed intervals through the relative movement distance of the linear grating ruler and the relative deviation of the double lasers, and performing real-time high-precision measurement operation of the upper and lower double lasers in a super laser range.
In the first generation unit, there are further provided:
the carrying and fixing module is used for carrying the upper laser on the movable longitudinal shaft; fixing the lower laser on the platform;
and the measuring module is used for measuring the object in the longitudinal shaft stroke by moving the longitudinal shaft through the laser of the instrument.
The second generation unit is further provided with:
and the dynamic calibration module is used for increasing the relative deviation value of the generated dynamic calibration upper laser and the dynamic calibration lower laser in real time.
In the embodiment of the system scheme of the present invention, the specific details of the method steps involved in the calibration of the upper and lower dual-laser precise ranging based on the linear grating scale have been described above, and are not described herein again.
In order to achieve the above object, the present invention further provides a calibration platform for precise distance measurement based on linear grating ruler with dual laser beams, as shown in fig. 3, including: the system comprises a processor, a memory and a linear grating ruler-based upper and lower double-laser precision distance measurement calibration platform control program;
the processor executes the linear grating ruler based upper and lower dual-laser precision distance measurement calibration platform control program, the linear grating ruler based upper and lower dual-laser precision distance measurement calibration platform control program is stored in the memory, and the linear grating ruler based upper and lower dual-laser precision distance measurement calibration platform control program realizes the linear grating ruler based upper and lower dual-laser precision distance measurement calibration method steps, such as:
s1, calculating the relative movement distance of a linear grating ruler in real time according to laser carried by the linear grating ruler;
s2, calculating and generating relative deviation fixed interval calibration data of the double lasers in real time by combining timing and comparison functions of a computer;
and S3, calibrating data at fixed intervals through the relative movement distance of the linear grating ruler and the relative deviation of the double lasers, and performing real-time high-precision measurement operation of the upper and lower double lasers in a super laser range.
The details of the steps have been set forth above and will not be described herein.
In the embodiment of the present invention, the built-in processor of the upper and lower dual laser precision distance measurement calibration platform based on the linear grating ruler may be composed of an integrated circuit, for example, a single packaged integrated circuit, or may be composed of a plurality of integrated circuits packaged with the same function or different functions, including one or more Central Processing Units (CPUs), a microprocessor, a digital Processing chip, a graphics processor, and a combination of various control chips. The processor is connected with each component by various interfaces and lines, and executes various functions and processes data by running or executing programs or units stored in the memory and calling data stored in the memory so as to execute the calibration of the upper and lower double-laser precise distance measurement based on the linear grating ruler;
the memory is used for storing program codes and various data, is arranged in the upper and lower double-laser precision distance measurement calibration platform based on the linear grating ruler, and realizes high-speed and automatic access of programs or data in the operation process.
The Memory includes Read-Only Memory (ROM), random Access Memory (RAM), programmable Read-Only Memory (PROM), erasable Programmable Read-Only Memory (EPROM), one-time Programmable Read-Only Memory (OTPROM), electrically Erasable rewritable Read-Only Memory (EEPROM), compact Disc Read-Only Memory (CD-ROM) or other optical Disc Memory, magnetic disk Memory, tape Memory, or any other medium readable by a computer that can be used to carry or store data.
In order to achieve the above object, the present invention further provides a computer readable storage medium, as shown in fig. 4, where the computer readable storage medium stores a linear grating ruler based upper and lower dual-laser precision distance measurement calibration platform control program, and the linear grating ruler based upper and lower dual-laser precision distance measurement calibration platform control program implements the linear grating ruler based upper and lower dual-laser precision distance measurement calibration method steps, such as:
s1, calculating the relative movement distance of a linear grating ruler in real time according to laser carried by the linear grating ruler;
s2, calculating and generating relative deviation fixed interval calibration data of the double lasers in real time by combining timing and comparison functions of a computer;
and S3, calibrating data at fixed intervals through the relative movement distance of the linear grating ruler and the relative deviation of the double lasers, and performing real-time high-precision measurement operation of the upper and lower double lasers in a super laser range.
The details of the steps have been set forth above and will not be described herein.
In describing embodiments of the present invention, it should be noted that any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and that the scope of the preferred embodiments of the present invention includes additional implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, such as an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processing module-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM).
Further, the computer readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
In an embodiment of the present invention, to achieve the above object, the present invention further provides a chip system, where the chip system includes at least one processor, and when a program instruction is executed in the at least one processor, the chip system executes the steps of the linear grating ruler-based up-down dual laser precision distance measurement calibration method, for example:
s1, calculating the relative movement distance of a linear grating ruler in real time according to laser carried by the linear grating ruler;
s2, calculating in real time to generate relative deviation fixed interval calibration data of the double lasers by combining timing and comparison functions of a computer;
and S3, calibrating data at fixed intervals through the relative movement distance of the linear grating ruler and the relative deviation of the double lasers, and performing real-time high-precision measurement operation of the upper and lower double lasers in a super-laser range.
The details of the steps have been set forth above and will not be described herein.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application. It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
According to the method, the relative movement distance of the linear grating ruler is calculated in real time according to the laser carried by the linear grating ruler; calculating in real time to generate relative deviation fixed interval calibration data of the double lasers by combining the timing and comparison functions of the computer; through the relative movement distance of the linear grating ruler and the relative deviation fixed interval calibration data of the double lasers, the high-precision measurement operation of the upper and lower double laser super laser ranges in real time, and the system and the platform corresponding to the method, the scheme can solve the problems of the distance measurement affected by the laser ranges and poor compatibility in the conventional double laser measurement combining the linear grating ruler; and the problem that the laser carrying shaft structure is influenced by temperature, so that the measuring result is influenced by expansion with heat and contraction with cold is solved.
That is to say, the limited laser range of the traditional double-laser measurement can be realized through the scheme, and the measurement cannot be carried out when the measurement object exceeds the laser range. The distance object exceeding the laser range can be measured by combining a linear grating ruler; meanwhile, the dynamic calibration method of the relative offset of the double-laser combined linear grating ruler can solve the problem of inaccurate measurement result caused by the influence of temperature on a mechanical structure.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit of the invention, and these changes and modifications are all within the scope of the invention. Therefore, the protection scope of the present patent should be subject to the appended claims.
Claims (10)
1. An upper and lower double-laser precision distance measurement calibration method based on a linear grating ruler is characterized by specifically comprising the following steps:
calculating the relative movement distance of the linear grating ruler in real time according to the laser carried by the linear grating ruler;
calculating and generating relative deviation fixed interval calibration data of the double lasers in real time by combining timing and comparison functions of a computer;
and (3) calibrating data at fixed intervals by the relative movement distance of the linear grating ruler and the relative deviation of the double lasers, and performing real-time high-precision measurement operation of the upper and lower double lasers in a super laser range.
2. The linear grating ruler-based up-down dual-laser precision distance measurement calibration method according to claim 1, wherein the step of calculating the relative movement distance of the linear grating ruler in real time according to the laser carried by the linear grating ruler further comprises the following steps:
carrying the upper laser on a moving vertical shaft; and the lower laser is fixed on the platform.
3. The linear grating ruler-based up-down dual-laser precision distance measurement calibration method according to claim 1 or 2, wherein the step of calculating the relative movement distance of the linear grating ruler in real time according to the laser carried by the linear grating ruler further comprises the following steps:
and measuring the object in the stroke of the longitudinal shaft by moving the longitudinal shaft through the laser of the instrument.
4. The linear grating ruler-based up-down dual-laser precise ranging calibration method as claimed in claim 3, wherein the instrument laser is a laser with a measuring range of 1 mm.
5. The linear grating ruler-based upper and lower double-laser precise distance measurement calibration method as claimed in claim 1, wherein the upper and lower double lasers are respectively carried on different structural bodies.
6. The linear grating ruler-based up-down double-laser precise distance measurement calibration method as claimed in claim 1, wherein the steps are combined with the timing and comparison functions of a computer, and relative deviation fixed interval calibration data of double lasers is generated through real-time calculation, and the method further comprises the following steps:
and increasing the relative deviation value of the generated dynamic calibration upper and lower double lasers in real time.
7. The utility model provides a based on two laser precision range finding calibration systems about linear grating chi which characterized in that the system specifically includes:
the first generation unit is used for calculating and generating the relative movement distance of the linear grating ruler in real time according to the laser carried by the linear grating ruler;
the second generation unit is used for calculating and generating the relative deviation fixed interval calibration data of the double lasers in real time by combining the timing and comparison functions of the computer;
and the measuring unit is used for calibrating data at fixed intervals through the relative movement distance of the linear grating ruler and the relative deviation of the double lasers, and performing real-time high-precision measurement operation of the upper and lower double lasers in a super laser range.
8. The linear grating ruler-based up-down dual-laser precision distance measurement calibration system according to claim 7, wherein the first generation unit further comprises:
the carrying and fixing module is used for carrying the upper laser on the movable longitudinal shaft; fixing the lower laser on the platform;
and the measuring module is used for measuring the object in the longitudinal shaft stroke by moving the longitudinal shaft through the laser of the instrument.
9. The linear-grating-ruler-based upper and lower double-laser precision distance measurement calibration system according to claim 7, wherein the second generation unit further comprises:
and the dynamic calibration module is used for increasing the relative deviation value of the generated dynamic calibration upper laser and the dynamic calibration lower laser in real time.
10. The utility model provides a based on two laser precision range finding calibration platform about linear grating chi which characterized in that includes: the system comprises a processor, a memory and a linear grating ruler-based upper and lower double-laser precise distance measurement calibration platform control program;
wherein the processor executes the linear grating ruler based up-down dual-laser precision distance measurement calibration platform control program, the linear grating ruler based up-down dual-laser precision distance measurement calibration platform control program is stored in the memory, and the linear grating ruler based up-down dual-laser precision distance measurement calibration platform control program realizes the linear grating ruler based up-down dual-laser precision distance measurement calibration method steps according to any one of claims 1 to 6.
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