CN104061944B - A kind of rotary axis angle speed precision demarcates detection device - Google Patents

A kind of rotary axis angle speed precision demarcates detection device Download PDF

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Publication number
CN104061944B
CN104061944B CN201410265825.6A CN201410265825A CN104061944B CN 104061944 B CN104061944 B CN 104061944B CN 201410265825 A CN201410265825 A CN 201410265825A CN 104061944 B CN104061944 B CN 104061944B
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China
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encoder
rotary axis
mounting seat
head
encoder count
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CN201410265825.6A
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CN104061944A (en
Inventor
张显奎
魏亮
胡淼
钟正虎
刘洪丰
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China Aerospace Times Electronics Corp
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China Aerospace Times Electronics Corp
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01CMEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C25/00Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass
    • G01C25/005Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass initial alignment, calibration or starting-up of inertial devices

Abstract

A kind of rotary axis angle speed precision demarcates detection device, including adjusting pedestal, grating drum mounting seat, the first encoder count head, the second encoder count head, encoder grating drum, read head mounting seat and rotary axis system, adjusting pedestal, grating drum mounting seat and encoder grating drum and be disc structure, grating drum mounting seat is fixedly mounted on the top adjusting pedestal;Rotary axis system and encoder grating drum are all fixedly installed in grating drum mounting seat;Read head mounting seat is fixing with rotary axis system to be connected, and the first encoder count head and the second encoder count head are arranged on bottom read head mounting seat;This invention removes grating drum setting-up eccentricity, read head installation site and support rod member and rock the impact on accuracy of detection, the detection device of angle speed precision demarcation simultaneously is easy to use, testing staff that need not be special, those skilled in the art can use through brief training, improve detection efficiency, it is ensured that precision calibration testing result is reliable.

Description

A kind of rotary axis angle speed precision demarcates detection device
Technical field
The present invention relates to a kind of rotary axis angle speed precision and demarcate detection device, it is adaptable to inertial measurement system The low angular rate precision calibration of all types of turntable of test equipment.
Background technology
Inertial measurement system is one of vitals of carrier rocket and guided missile, its parameters the most qualified and The quality of stability will directly affect the success or failure of transmitting, therefore inertial measurement system before dispatching from the factory and before using all Test equipment to be used edits detection to it, only edits the qualified inertial measurement system of detection and just allows Upper arrow or upper bullet use.Test equipment is the necessaries that inertial measurement system carries out editing detection, due to angle Speed precision and stability are one of most important indexs of test equipment, therefore to ensure this index can By property, test equipment must carry out angle speed precision before use and demarcate detection.
At present conventional inertial measurement system test equipment have single shaft rate table, uniaxial strip incubator rate table, Twin shaft rate table, twin shaft band incubator rate table, three axle rate tables and three axle band incubator rate tables etc..
In order to ensure to edit the accuracy of detection, generally the precision index of test equipment is required higher, especially It it is angle speed precision index.For angular speed range Theta > 10 °/s time, angle speed precision usually requires that≤1 × 10-5, Now angle speed precision is obtained by 360 ° of average computation, can use time therefore for angular speed θ > 10 °/s External photoelectricity Hall is demarcated.But during for angular speed 1 °/s < θ≤10 °/s, angle speed precision usually requires that ≤1×10-4, obtained by 10 ° of average computation;Angular speed range Theta≤1 °/s, angle speed precision usually requires that ≤1×10-3, being obtained by 1 ° of average computation, the most external photoelectricity Hall scaling method cannot be carried out demarcating, by In national military standard and national standard, there is no relevant unified standard, generally use the method for external encoder to carry out Demarcate detection.
The external standardizition of currently used encoder needs to be fabricated separately frock for different test equipment, compiles Code device read head needs by exterior cantilevered arms beam alignment grating drum, thus causes demarcation detection equipment complicated, peace Dress inconvenience, needs specialty to debug personnel and debugs detection equipment.Simultaneously as single read head cannot Eliminate eccentric error, and cantilever beam is easily by the shadow of the outside environmental elements such as outside air disturbance and earth shock Ring, thus cause angle speed precision demarcation testing result unreliable, cause great human and material resources and time The waste of cost, possibly even causes carrier rocket or missile mishap time serious.
Summary of the invention
The technology of the present invention solves problem: overcome the deficiencies in the prior art, it is provided that a kind of rotary axis angle Speed precision demarcates detection device, eliminates outside environmental elements and installation factor and angle speed precision is demarcated inspection The impact surveyed, easy to use, improve detection efficiency, it is ensured that angle speed precision demarcates testing result can Lean on.
The technical solution of the present invention: provide a kind of rotary axis angle speed precision and demarcate detection device, Including: adjust pedestal, grating drum mounting seat, the first encoder count head, the second encoder count head, volume Code device grating drum, read head mounting seat and rotary axis system;
Adjusting pedestal, grating drum mounting seat and encoder grating drum and be disc structure, grating drum mounting seat is solid Dingan County is contained in the top adjusting pedestal;Rotary axis system and encoder grating drum are all fixedly installed to grating drum and install On seat;Described adjustment encoder grating drum is co-axially mounted with rotary axis system, and axiality is better than 0.003mm;
Read head mounting seat is fixing with rotary axis system to be connected and along with rotary axis system rotates, the first encoder count Head and the second encoder count head are installed in bottom read head mounting seat, the first encoder count head and second Encoder count head be 180 ° symmetrical, alignment error be less than 1 °;First encoder count head and Second encoder count head rotates along with rotary axis system, reads the scale on encoder grating drum;
Read head mounting seat includes the first adjustment plate, the second adjustment plate, connecting plate, the first fork plate and second Fork plate;
First adjustment plate and the second adjustment plate are Z-type structure and have two mounting holes in lower surface, and first Encoder count head is connected by mounting hole and screw and the first adjustment plate, and the second encoder count head passes through waist Shape hole and screw and the second adjustment plate connect, and regulate the first volume by changing screw position in mounting hole The spacing that code device read head and the second encoder count head rouse with encoder grating;
First adjustment plate, the second adjustment plate, the first fork plate and the second fork plate are all fixedly mounted on connecting plate On, the first fork plate and the second fork plate are provided spacing by outside support, it is ensured that read head mounting seat does not rotates.
Described rotary axis system includes bearing assembly, main shaft, bearing block, bearing cap, packing ring and locking nut, Main shaft is hollow circular cylinder structure, and bearing assembly includes two identical bearings;
Bearing cap is circular ring structure, and bearing cap is fixedly connected with the bearing seat, bearing cap, bearing block and main shaft structure Becoming confined air cavity, bearing assembly is positioned at bearing cap, bearing block constitutes closed cavity body with main shaft;
Packing ring is fixedly mounted on the outer circumferential of main shaft by locking nut, locking nut and packing ring with the use of Apply pretightning force to bearing assembly and eliminate bearing clearance, it is ensured that the rotating accuracy of rotary axis system.
Described first encoder count head, the second encoder count head and encoder grating drum composition encoder, Encoder accuracy is higher than detected rotary axis precision prescribed.
Two bearings in described bearing assembly are accurate angular contact ball bearing and two bearings are pacified back-to-back Dress.
The present invention having the beneficial effects that compared with prior art:
(1) present invention is the self-contained structure of integral type, can use continuously after once having debug, it is not necessary to dismounting Encoder count head and grating drum, it is to avoid because being dismounted for multiple times is to encoder grating drum and read head self precision Impact, it is ensured that angle speed precision demarcate testing result reliable;
(2) in the present invention, encoder count head is connected with rotary axis system by read head mounting seat, it is to avoid use Long cantilever beam, can eliminate the outside environmental elements such as air agitation and earth shock to angle speed precision mark The impact that regular inspection is surveyed, it is ensured that it is reliable that angle speed precision demarcates testing result;
(3) in the present invention, encoder count head can be directed at rapidly encoder grating drum zero-bit, is not required to during installation To be directed in advance, to install simple and convenient and reliable;
(4) in the present invention, encoder uses the mode of double-reading head, and symmetrical in 180 °, can disappear Except causing detection error due to encoder setting-up eccentricity, it is ensured that it is reliable that angle speed precision demarcates testing result;
(5) in the present invention, Main axis surpporting device uses accurate angular contact ball bearing, and bearing size is little, rigidity Greatly, it is ensured that the rotating accuracy of rotary axis system alleviates again the weight of rotary axis system;
(6) present invention can quickly realize and the connection of measured axis system and same axial adjustment by adjusting pedestal, peace Fill simple and reliable;
(7) present invention is easy to use, and those skilled in the art can use through brief training, improves Detection efficiency, it is ensured that it is reliable that angle speed precision demarcates testing result.
Accompanying drawing explanation
Fig. 1 is the front view of device in the present invention;
Fig. 2 is the top view of device in the present invention;
Fig. 3 is the structural representation of rotary axis system of the present invention;
Fig. 4 is the structural representation of grating of the present invention drum mounting seat;
Fig. 5 is the structural representation of read head mounting seat of the present invention;
Fig. 6 is the structural representation that the present invention adjusts pedestal.
Detailed description of the invention
The present invention is further detailed explanation with specific embodiment below in conjunction with the accompanying drawings.
Fig. 1 and Fig. 2 is respectively front view and the top view of device in the present invention, knowable to Fig. 1 and Fig. 2, A kind of rotary axis angle speed precision related in the present invention is demarcated detection device and is included: adjust pedestal 1, light Grid drum mounting seat the 2, first encoder count head the 3, second encoder count head 4, encoder grating drum 5, Read head mounting seat 6 and rotary axis system 8.
Adjust pedestal 1, grating drum mounting seat 2 and encoder grating drum 5 and be disc structure, grating drum peace Dress seat 2 is fixedly mounted on the top adjusting pedestal 1;The all fixing peace of rotary axis system 8 and encoder grating drum 5 Install in grating drum mounting seat 2;Adjust encoder grating drum 5 during installation to be co-axially mounted with rotary axis system 8, Axiality is better than 0.003mm.
Read head mounting seat 6 is fixing with rotary axis system 8 to be connected, the first encoder count head 3 and the second coding Device read head 4 is arranged on bottom read head mounting seat 6.First encoder count head the 3, second encoder is read Several 4 and encoder grating drum 5 form encoder, and encoder accuracy wants refinement higher than detected rotary axis Degree.
Read head mounting seat 6 includes first adjustment plate the 9, second adjustment plate 17, connecting plate the 10, first shift fork Plate 11 and the second fork plate 18.
First adjustment plate 9 and the second adjustment plate 17 are Z-type structure and have two waists in horizontal lower end face Shape hole, the first encoder count head 3 is connected by mounting hole and screw and the first adjustment plate 9, the second coding Device read head 4 is connected by mounting hole and screw and the second adjustment plate 17, the first encoder count head 3 He Second encoder count head 4 is symmetrical in 180 °, and alignment error is less than 1 °, by changing screw Position in mounting hole regulates the first encoder count head 3 and the second encoder count head 4 and encoder The spacing of grating drum 5.
The all fixing peace of first adjustment plate the 9, second adjustment plate the 17, first fork plate 11 and the second fork plate 18 Being contained on connecting plate 10, the first fork plate 11 and the second fork plate 18 are provided spacing by outside support, really Protect read head mounting seat 6 not rotate.
Rotary axis system 8 includes bearing assembly 7, main shaft 12, bearing block 13, bearing cap 14, packing ring 15 With locking nut 16, main shaft 12 is hollow circular cylinder structure, and bearing assembly 7 includes two identical bearings, Two bearings are accurate angular contact ball bearing and install back-to-back.
Bearing cap 14 is circular ring structure, and bearing cap 14 is fixing with bearing block 13 to be connected, bearing cap 14, axle Bearing 13 and main shaft 12 constitute confined air cavity, bearing assembly 7 be positioned at bearing cap 14, bearing block 13 with Main shaft 12 is constituted in closed cavity body.
Packing ring 15 is fixedly mounted on the outer circumferential of main shaft 12 by locking nut 16, locking nut 16 with Packing ring 15 applies pretightning force elimination bearing clearance with the use of to bearing assembly 7, it is ensured that returning of rotary axis system Turn precision.
It is as follows that a kind of rotary axis angle speed precision related in the present invention demarcates detection device installation steps:
(1) rotary axis system 8 installation step: select bearing assembly 7, model is B71908C (E) .T.P4S Accurate angular contact ball bearing, it is desirable to circular runout rule is identical, and jerk value difference is the least, by bearing group Part 7 loads in bearing block 13, it is desirable to bearing assembly 7 outer ring and bearing block 13 fit dimension are matched in clearance + 0.001~+0.003mm, bearing cap 14 is connected compression axis bearing assembly 7 outer ring with bearing block 13.Will be main Axle 12 loads bearing assembly 7 endoporus, it is desirable to main shaft 12 is joined with bearing assembly 7 inner hole a size of interference Close-0.001~-0.003mm, then packing ring 15 and locking nut 16 are connected compression bearing group successively with main shaft Part 7 inner ring eliminates play, ensures that bearing block 13 is better than 0.005mm with the axiality of main shaft 12 by adjusting.
(2) Fig. 4 show the grating drum mounting seat 2 of the present invention, by encoder grating drum 5 and rotary axis system 8 are respectively installed in grating drum mounting seat 2, adjust encoder grating drum 5, make encoder grating drum 5 phase Circular runout for rotary axis system 8 is better than 0.005mm, and end face run-out is better than 0.01mm.
(3) Fig. 5 show the read head mounting seat 6 of the present invention, adjusts including the first adjustment plate 9, second Plate 17, connecting plate the 10, first fork plate 11 and the second fork plate 18, adjust the first adjustment plate 9, second Imposite the 17, first fork plate 11 and the second fork plate 18 are respectively installed on connecting plate 10, the first shift fork Plate 11 and the second fork plate 18 can be provided spacing by outside support, it is ensured that carry out angle speed precision and demarcate inspection During survey, the first encoder count head 3 and the second encoder count head 4 remain static.
(4) read head mounting seat 6 is installed on the bearing block 13 of rotary axis system 8, is read by the first encoder Several 3 and the second encoder count head 4, in 180 ° of symmetries, are respectively installed to the first adjustment plate 9 and second and adjust On imposite 17, and repair the first adjustment plate 9 and the second adjustment plate 17 by joining, make the first encoder count head 3 and second encoder count head 4 lower surface and encoder grating drum 5 installed surface difference in height be 3 ± 0.1mm, And first the gap of encoder count head 3 and the second encoder count head 4 and encoder grating drum 5 be 0.8 ± 0.08mm, to ensure that code device signal intensity is in optimum state.
(5) by grating drum mounting seat the 2, first encoder count head the 3, second encoder count head 4, compile The parts that code device grating drum 5, read head mounting seat 6, rotary axis system 8 are assembled together and adjustment pedestal 1 Connect and i.e. complete debuging of angle speed precision demarcation detection device.
(6) Fig. 6 show the adjustment pedestal 1 of the present invention, is distributed respectively at the outer adjusting pedestal 1 8 M4 screwed holes and 8 Φ 5mm through holes, by adjusting 8 (or 4) Φ 5mm of pedestal 1 The angle speed precision that assembling is completed by through hole nail pressing is demarcated detection device and is connected with rotary axis, adjusts pedestal 8 (or 4) M4 screwed holes on 1 install top nail, measure respectively on main shaft 12 with lever indicator End endoporus and encoder grating drum 5 upper surface, by adjusting top nail and nail pressing, make main shaft 12 upper end endoporus Being better than 0.01mm with rotary axis axiality, the end face run-out of encoder grating drum 5 is better than 0.01mm, The angle speed precision of rotary axis can be detected.
Rotary axis system 8 shown in Fig. 3 is in order to keep the rotating accuracy of axle system, it is desirable to axle system to have higher firm Degree, therefore main shaft 12, bearing block 13, bearing cap 14, packing ring 15 and locking nut 16 have employed stable Property and the good metal material of intensity, material therefor is steel 45.
In grating drum mounting seat 2 shown in Fig. 4, encoder grating drum 5 and rotary axis system 8 are installed, in order to Ensureing to demarcate the rigidity of detection device, grating drum mounting seat 2 material therefor is steel 45, in order to alleviate demarcation inspection Surveying the weight of device, grating drum mounting seat 2, by arranging that reinforcement eliminates a part of material, is ensureing just Certain weight is alleviated on the premise of degree.Simultaneously in order to prevent from colliding with during assembling, carrying and use Encoder grating drum and read head, grating drum mounting seat 2 outside dimension is more than demarcating encoder in detection device Read head outside dimensions, and according to circumstances can install containment vessel additional in grating drum mounting seat 2.
The version adjusting pedestal 1 shown in Fig. 6 can be carried out according to detected rotary axis size for connection It is correspondingly improved, is not limited to currently shown version.
The operation principle of the present invention:
During use, a kind of rotary axis angle speed precision in the present invention demarcates detection device by adjusting pedestal 1 is connected with equipment under test, the first encoder count head 3 and the second encoder count head 4 and outer computer Connect, be used for gathering and process read head data;
Adjust the main shaft 12 in pedestal 1, grating drum mounting seat 2, encoder grating drum 5 and rotary axis system 8, Packing ring 15 and locking nut 16 form rotor, fix with tested turntable and are connected, keep synchronous axial system;
First encoder count head the 3, second encoder count head 4, read head mounting seat 6 and rotary axis system 8 In bearing block 13 and bearing cap 14 form stator, external equipment fix, remain stationary as;
When carrying out angular speed demarcation detection, rotor relatively rotates with stator, the first encoder count head 3, Second encoder count head 4 and encoder grating drum 5 form angular speed detecting system, the first encoder count 3 and second encoder count head 4 read the scale on encoder grating drum 5 respectively, and by acquired Data are transferred to outer computer storage and process, the first encoder count head 3 and the second encoder count head 4 use simultaneously, can be with the systematic error of cancellation element, it is ensured that accuracy of detection.
The non-detailed description of the present invention is known to the skilled person technology.

Claims (4)

1. rotary axis angle speed precision demarcates a detection device, including adjusting pedestal (1), grating drum Mounting seat (2), the first encoder count head (3), the second encoder count head (4), encoder grating drum And read head mounting seat (6) (5), it is characterised in that: described detection device also includes rotary axis system (8);
Adjust pedestal (1), grating drum mounting seat (2) and encoder grating drum (5) and be disc structure, Grating drum mounting seat (2) is fixedly mounted on the top adjusting pedestal (1);Rotary axis system (8) and coding Device grating drum (5) is all fixedly installed on grating drum mounting seat (2);Adjust described encoder grating drum (5) Being co-axially mounted with rotary axis system (8), axiality is better than 0.003mm;
Read head mounting seat (6) is fixing with rotary axis system (8) to be connected and along with rotary axis system (8) rotates, First encoder count head (3) and the second encoder count head (4) are installed in read head mounting seat (6) Bottom, the first encoder count head (3) and the second encoder count head (4) are symmetrical in 180 °, Alignment error is less than 1 °;First encoder count head (3) and the second encoder count head (4) along with Rotary axis system (8) rotates, and reads the scale on encoder grating drum (5);
Read head mounting seat (6) include the first adjustment plate (9), the second adjustment plate (17), connecting plate (10), First fork plate (11) and the second fork plate (18);
First adjustment plate (9) and the second adjustment plate (17) are Z-type structure and have two in lower surface Mounting hole, the first encoder count head (3) is connected by mounting hole and screw and the first adjustment plate (9), Second encoder count head (4) is connected, by changing by mounting hole and screw and the second adjustment plate (17) Become screw position in mounting hole and regulate the first encoder count head (3) and the second encoder count head (4) spacing of (5) is roused with encoder grating;
First adjustment plate (9), the second adjustment plate (17), the first fork plate (11) and the second fork plate (18) All being fixedly mounted on connecting plate (10), the first fork plate (11) and the second fork plate (18) are by outside Support provides spacing, it is ensured that read head mounting seat (6) does not rotates.
A kind of rotary axis angle speed precision the most according to claim 1 demarcates detection device, and it is special Levy and be: described rotary axis system (8) include bearing assembly (7), main shaft (12), bearing block (13), Bearing cap (14), packing ring (15) and locking nut (16), main shaft (12) is hollow circular cylinder structure, Bearing assembly (7) includes two identical bearings;
Bearing cap (14) is circular ring structure, and bearing cap (14) is fixing with bearing block (13) to be connected, bearing Lid (14), bearing block (13) constitute confined air cavity with main shaft (12), and bearing assembly (7) is positioned at axle Hold lid (14), bearing block (13) is constituted in closed cavity body with main shaft (12);
Packing ring (15) is fixedly mounted on the outer circumferential of main shaft (12), locking by locking nut (16) Nut (16) applies pretightning force elimination bearing clearance with packing ring (15) with the use of to bearing assembly (7), Ensure the rotating accuracy of rotary axis system.
A kind of rotary axis angle speed precision the most according to claim 1 demarcates detection device, and it is special Levy and be: described first encoder count head (3), the second encoder count head (4) and encoder grating Drum (5) composition encoder, encoder accuracy is higher than detected rotary axis precision prescribed.
A kind of rotary axis angle speed precision the most according to claim 2 demarcates detection device, and it is special Levy and be: two bearings in described bearing assembly (7) are accurate angular contact ball bearing and two bearings Install back-to-back.
CN201410265825.6A 2014-06-13 2014-06-13 A kind of rotary axis angle speed precision demarcates detection device Active CN104061944B (en)

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CN105571524B (en) * 2015-12-16 2018-09-07 贵州航天计量测试技术研究所 A kind of transmission shaft angle-measuring equipment based on Circular gratings
CN106556413B (en) * 2016-11-07 2019-10-18 哈尔滨工程大学 A kind of two axis based on piezoelectric ceramic motor are without magnetic electrical turntable
CN106647511A (en) * 2016-12-28 2017-05-10 中国科学院长春光学精密机械与物理研究所 Telescope control system based on segment arc permanent magnetism synchronous torque motor
CN106871941A (en) * 2017-02-20 2017-06-20 重庆机床(集团)有限责任公司 A kind of easy-disassembling-assembling fine angle encoder
CN107421569B (en) * 2017-05-19 2019-12-24 中国电子科技集团公司第四十一研究所 High-resolution high-precision compensation subdivision device and method for double photoelectric encoders

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