CN104061944A - Device for detecting angular rate precision calibration with rotating shaft system - Google Patents

Device for detecting angular rate precision calibration with rotating shaft system Download PDF

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Publication number
CN104061944A
CN104061944A CN201410265825.6A CN201410265825A CN104061944A CN 104061944 A CN104061944 A CN 104061944A CN 201410265825 A CN201410265825 A CN 201410265825A CN 104061944 A CN104061944 A CN 104061944A
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CN
China
Prior art keywords
scrambler
read head
rotary axis
grating drum
mount pad
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CN201410265825.6A
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Chinese (zh)
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CN104061944B (en
Inventor
张显奎
魏亮
胡淼
钟正虎
刘洪丰
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China Aerospace Times Electronics Corp
Beijing Aerospace Control Instrument Institute
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China Aerospace Times Electronics Corp
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Priority to CN201410265825.6A priority Critical patent/CN104061944B/en
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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

The invention discloses a device for detecting the angular rate precision calibration with a rotating shaft system. The device comprises an adjusting base, a grating drum mounting base, a first encoder reading head, a second encoder reading head, an encoder grating drum, a reading head mounting base and a rotary shaft system, wherein the adjusting base, the grating drum mounting base and the encoder grating drum are all of disc structures; the grating drum mounting base is fixedly mounted on the top of the adjusting base; the rotary shaft system and the encoder grating drum are both fixedly mounted on the grating drum mounting base; the reading head mounting base is fixedly connected with the rotary shaft system; the first encoder reading head and the second encoder reading head are mounted at the bottom of the reading head mounting base. By adopting the device, the influence of mounting eccentricity of the grating drum, the reading head mounting position and the support rod shaking to the detection precision is eliminated, meanwhile the device is simple and convenient to use, special detection personnel are not needed, the device can be used by ordinary technicians after simple training, the detection efficiency is improved, and reliable precision calibration detection result is ensured.

Description

A kind of rotary axis angle speed precision is demarcated pick-up unit
Technical field
The present invention relates to a kind of rotary axis angle speed precision and demarcate pick-up unit, be applicable to the low angular rate precision calibration of all types of turntables of inertial measurement system testing apparatus.
Background technology
Inertial measurement system is one of vitals of carrier rocket and guided missile, its parameters quality whether qualified and stability will directly affect the success or failure of transmitting, therefore inertial measurement system all wants use test equipment to edit detection to it before dispatching from the factory and before using, and only edits the qualified inertial measurement system of detection and just allows arrow or upper bullet to use.Testing apparatus is the necessaries that inertial measurement system edits detection, because angle speed precision and stability are one of most important indexs of testing apparatus, therefore in order to ensure the reliability of this index, testing apparatus must be carried out before use angle speed precision and be demarcated detection.
Conventional inertial measurement system testing apparatus has single shaft rate table, single shaft band 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. at present.
In order to ensure to edit the accuracy of detection, conventionally the precision index of testing apparatus is had relatively high expectations, especially angle speed precision index.During for >10 °/s of angular speed range Theta, angle speed precision requires conventionally≤and 1 × 10 -5, now angle speed precision obtains by 360 ° of average computation, during therefore for >10 °/s of angular speed θ, can use external photoelectricity Hall to demarcate.But during for 1 °/s< of angular speed θ≤10 °/s, angle speed precision requires conventionally≤and 1 × 10 -4, obtain by 10 ° of average computation; Angular speed range Theta≤1 °/s, angle speed precision requires conventionally≤and 1 × 10 -3, obtain by 1 ° of average computation, now external photoelectricity Hall scaling method cannot be demarcated, and owing to there is no relevant unified standard in national military standard and national standard, conventionally uses the method for external scrambler to demarcate detection.
The external standardization of scrambler using at present needs to make separately frock for different testing apparatuss, scrambler read head need to be aimed at grating drum by outside semi-girder, demarcate checkout equipment complexity thereby cause, inconvenience is installed, need the specialty personnel that debug to debug checkout equipment.Simultaneously, because single read head cannot be eliminated eccentric error, and semi-girder is easily subject to the impact of the external environment factors such as outside air disturbance and earth shock, thereby cause angle speed precision demarcation testing result unreliable, cause the waste of great human and material resources and time cost, when serious, even may cause carrier rocket or missile mishap.
Summary of the invention
Technology of the present invention is dealt with problems and is: overcome the deficiencies in the prior art, provide a kind of rotary axis angle speed precision to demarcate pick-up unit, get rid of external environment factor and installation factor and angle speed precision has been demarcated to the impact detecting, easy to use, improve detection efficiency, guaranteed that angle speed precision demarcation testing result is reliable.
Technical solution of the present invention: provide a kind of rotary axis angle speed precision to demarcate pick-up unit, having comprised: adjust pedestal, grating drum mount pad, the first scrambler read head, the second scrambler read head, scrambler grating drum, read head mount pad and rotary axis system;
Adjust pedestal, grating drum mount pad and scrambler grating drum and be disc structure, grating drum mount pad is fixedly mounted on the top of adjusting pedestal; Rotary axis system and scrambler grating drum are all fixedly installed on grating drum mount pad; Described adjustment scrambler grating drum is coaxially installed with rotary axis system, and right alignment is better than 0.003mm;
Read head mount pad be fixedly connected with rotary axis system and along with rotary axis system rotate, the first scrambler read head and the second scrambler read head are installed in read head mount pad bottom, the first scrambler read head and the second scrambler read head be 180 ° symmetrical, alignment error is no more than 1 °; The first scrambler read head and the second scrambler read head, along with rotary axis system rotates, read the scale on scrambler grating drum;
Read head mount pad comprises the first adjustment plate, the second adjustment plate, web joint, the first fork plate and the second fork plate;
The first adjustment plate and second is adjusted plate and is Z-type structure and has two mounting holes in lower surface, the first scrambler read head is adjusted plate by mounting hole with screw and first and is connected, the second scrambler read head is adjusted plate by mounting hole with screw and second and is connected, and regulates the spacing of the first scrambler read head and the second scrambler read head and scrambler grating drum by changing the position of screw in mounting hole;
First adjusts plate, the second adjustment plate, the first fork plate and the second fork plate is all fixedly mounted on web joint, and the first fork plate and the second fork plate provide spacing by outside support, guarantee that read head mount pad does not rotate.
Described rotary axis system comprises bearing assembly, main shaft, bearing seat, bearing cap, packing ring and set nut, and main shaft is hollow circuit cylinder body structure, and bearing assembly comprises two identical bearings;
Bearing cap is circular ring structure, and bearing cap is fixedly connected with bearing seat, and bearing cap, bearing seat and main shaft form confined air cavity, and bearing assembly is positioned at bearing cap, bearing seat and main shaft and forms confined air cavity;
Set nut and packing ring were used in conjunction with and applied pretightning force to bearing assembly and eliminate bearing clearance, ensure the rotating accuracy of rotary axis system laterally the week that packing ring is fixedly mounted on main shaft by set nut.
Described the first scrambler read head, the second scrambler read head and scrambler grating drum composition scrambler, scrambler precision is higher than detected rotary axis precision prescribed.
Two bearings in described bearing assembly are accurate angular contact ball bearing and two bearings are installed back-to-back.
The present invention's beneficial effect is compared with prior art:
(1) the present invention is the self-contained structure of integral type, after once having debug, can use continuously, without dismounting scrambler read head and grating drum, avoid, because of the impact of being dismounted for multiple times on scrambler grating drum and read head self precision, guaranteeing that angle speed precision demarcation testing result is reliable;
(2) in the present invention, scrambler read head is connected with rotary axis system by read head mount pad, avoid using long semi-girder, can eliminate the external environment such as air turbulence and earth shock factor and angle speed precision be demarcated to the impact detecting, guarantee that angle speed precision demarcation testing result is reliable;
(3) in the present invention, scrambler read head can be aimed at rapidly scrambler grating drum zero-bit, does not need to aim in advance when installation, installs simple and convenient and reliable;
(4) in the present invention, scrambler adopts the mode of double-reading head, and be 180 ° symmetrical, can eliminate because scrambler setting-up eccentricity causes detection error, guarantee that angle speed precision is demarcated testing result reliable;
(5) in the present invention, Main axis surpporting device adopts accurate angular contact ball bearing, and bearing size is little, rigidity is large, has ensured that the rotating accuracy of rotary axis system has alleviated again the weight of rotary axis system;
(6) the present invention can realize and being connected and same axial adjustment that measured axis is fast by adjusting pedestal, installs simple and reliable;
(7) the present invention is easy to use, and those skilled in the art can use through brief training, have improved detection efficiency, guarantees that angle speed precision demarcation testing result is reliable.
Brief description of the drawings
Fig. 1 is the front view installing in the present invention;
Fig. 2 is the vertical view installing 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 drum mount pad of the present invention;
Fig. 5 is the structural representation of read head mount pad of the present invention;
Fig. 6 is the structural representation that the present invention adjusts pedestal.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
Fig. 1 and Fig. 2 are respectively the front view and the vertical view that in the present invention, install, from Fig. 1 and Fig. 2, a kind of rotary axis angle speed precision relating in the present invention is demarcated pick-up unit and is comprised: adjust pedestal 1, grating drum mount pad 2, the first scrambler read head 3, the second scrambler read head 4, scrambler grating drum 5, read head mount pad 6 and rotary axis system 8.
Adjust pedestal 1, grating drum mount pad 2 and scrambler grating drum 5 and be disc structure, grating drum mount pad 2 is fixedly mounted on the top of adjusting pedestal 1; Rotary axis system 8 and scrambler grating drum 5 are all fixedly installed on grating drum mount pad 2; When installation, adjust scrambler grating drum 5 and coaxially install with rotary axis system 8, right alignment is better than 0.003mm.
Read head mount pad 6 is fixedly connected with rotary axis system 8, and the first scrambler read head 3 and the second scrambler read head 4 are arranged on read head mount pad 6 bottoms.The first scrambler read head 3, the second scrambler read head 4 and scrambler grating drum 5 form scrambler, and scrambler precision is higher than detected rotary axis precision prescribed.
Read head mount pad 6 comprises the first adjustment plate 9, the second adjustment plate 17, web joint 10, the first fork plate 11 and the second fork plate 18.
The first adjustment plate 9 and second is adjusted plate 17 and is Z-type structure and has two mounting holes in horizontal lower surface, the first scrambler read head 3 is adjusted plate 9 by mounting hole with screw and first and is connected, the second scrambler read head 4 is adjusted plate 17 by mounting hole with screw and second and is connected, the first scrambler read head 3 and the second scrambler read head 4 be 180 ° symmetrical, alignment error is no more than 1 °, regulates the spacing of the first scrambler read head 3 and the second scrambler read head 4 and scrambler grating drum 5 by changing the position of screw in mounting hole.
First adjusts plate 9, the second adjustment plate 17, the first fork plate 11 and the second fork plate 18 is all fixedly mounted on web joint 10, and the first fork plate 11 and the second fork plate 18 provide spacing by outside support, guarantee that read head mount pad 6 does not rotate.
Rotary axis system 8 comprises bearing assembly 7, main shaft 12, bearing seat 13, bearing cap 14, packing ring 15 and set nut 16, main shaft 12 is hollow circuit cylinder body structure, bearing assembly 7 comprises two identical bearings, and 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 fixedly connected with bearing seat 13, and bearing cap 14, bearing seat 13 form confined air cavity with main shaft 12, and bearing assembly 7 is positioned at bearing cap 14, bearing seat 13 forms confined air cavity with main shaft 12.
Set nut 16 and packing ring 15 were used in conjunction with and applied pretightning force to bearing assembly 7 and eliminate bearing clearance, ensure the rotating accuracy of rotary axis system laterally the week that packing ring 15 is fixedly mounted on main shaft 12 by set nut 16.
A kind of rotary axis angle speed precision demarcation pick-up unit installation steps that relate in the present invention are as follows:
(1) rotary axis system 8 installation step: select bearing assembly 7, model is the accurate angular contact ball bearing of B71908C (E) .T.P4S, require diameter run-out rule identical, jerk value is poor as far as possible little, bearing assembly 7 is packed in bearing seat 13, requiring bearing assembly 7 outer rings and bearing seat 13 fit dimensions is clearance fit+0.001~+ 0.003mm, and bearing cap 14 is connected compression axis bearing assembly 7 outer rings with bearing seat 13.Pack main shaft 12 into bearing assembly 7 endoporus, requiring main shaft 12 and bearing assembly 7 endoporus fit dimensions is interference fit-0.001~-0.003mm, again packing ring 15 and set nut 16 are connected successively to compression axis bearing assembly 7 inner rings with main shaft and eliminate play, ensure that by adjustment bearing seat 13 and the right alignment of main shaft 12 are better than 0.005mm.
(2) Figure 4 shows that grating drum mount pad 2 of the present invention, scrambler grating drum 5 and rotary axis system 8 are respectively installed on grating drum mount pad 2, adjust scrambler grating drum 5, make scrambler grating drum 5 be better than 0.005mm with respect to the diameter run-out of rotary axis system 8, face runout is better than 0.01mm.
(3) Figure 5 shows that read head mount pad 6 of the present invention, comprise the first adjustment plate 9, the second adjustment plate 17, web joint 10, the first fork plate 11 and the second fork plate 18, the first adjustment plate 9, the second adjustment plate 17, the first fork plate 11 and the second fork plate 18 are respectively installed on web joint 10, the first fork plate 11 and the second fork plate 18 can provide spacing by outside support, and while guaranteeing to carry out angle speed precision demarcation detection, the first scrambler read head 3 and the second scrambler read head 4 remain static.
(4) read head mount pad 6 is installed on the bearing seat 13 of rotary axis system 8, the first scrambler read head 3 and the second scrambler read head 4 are to 180 ° of symmetries, being respectively installed to the first adjustment plate 9 and second adjusts on plate 17, and repair the first adjustment plate 9 and the second adjustment plate 17 by joining, making the first scrambler read head 3 and the second scrambler read head 4 lower surfaces and scrambler grating drum 5 installed surface differences in height is 3 ± 0.1mm, and the first scrambler read head 3 and the second scrambler read head 4 are 0.8 ± 0.08mm with the gap of scrambler grating drum 5, to ensure that code device signal intensity is in optimum condition.
(5) parts that grating drum mount pad 2, the first scrambler read head 3, the second scrambler read head 4, scrambler grating drum 5, read head mount pad 6, rotary axis system 8 are assembled together are connected and have completed debuging of angle speed precision demarcation pick-up unit with adjustment pedestal 1.
(6) Figure 6 shows that adjustment pedestal 1 of the present invention, be distributed with respectively 8 M4 threaded holes and 8 Φ 5mm through holes at the outer place that adjusts pedestal 1, the angle speed precision by nail pressing, assembling being completed by 8 (or 4) Φ 5mm through holes of adjustment pedestal 1 is demarcated pick-up unit and is connected with rotary axis, 8 (or 4) M4 threaded holes adjusting on pedestal 1 are installed top nail, measure respectively main shaft 12 upper end endoporus and scrambler grating drum 5 upper surfaces with lever indicator, push up nail and nail pressing by adjustment, make main shaft 12 upper end endoporus and rotary axis right alignment be better than 0.01mm, the face runout of scrambler grating drum 5 is better than 0.01mm, can detect the angle speed precision of rotary axis.
Rotary axis system 8 shown in Fig. 3 is in order to keep the rotating accuracy of axle system, require axle system will have higher rigidity, therefore main shaft 12, bearing seat 13, bearing cap 14, packing ring 15 and set nut 16 have adopted stability and the good metal material of intensity, and material therefor is steel 45.
On grating drum mount pad 2 shown in Fig. 4, scrambler grating drum 5 and rotary axis system 8 are installed, in order to ensure to demarcate the rigidity of pick-up unit, grating drum mount pad 2 material therefors are steel 45, in order to alleviate the weight of demarcating pick-up unit, grating drum mount pad 2 has been removed a part of material by arranging reinforcement, under the prerequisite that ensures rigidity, has alleviated certain weight.Simultaneously in order to prevent collide with scrambler grating drum and read head in assembling, carrying and use procedure; grating drum mount pad 2 outside dimensions are greater than demarcates scrambler read head outside dimensions in pick-up unit, and can according to circumstances on grating drum mount pad 2, install containment vessel additional.
The version of the adjustment pedestal 1 shown in Fig. 6 can be improved accordingly according to detected rotary axis size for connection, has more than and is confined to the version shown in current.
Principle of work of the present invention:
When use, a kind of rotary axis angle speed precision in the present invention is demarcated pick-up unit and is connected with equipment under test by adjusting pedestal 1, and the first scrambler read head 3 is connected with outer computer with the second scrambler read head 4, for acquisition and processing read head data;
Main shaft 12, packing ring 15 and the set nut 16 adjusted in pedestal 1, grating drum mount pad 2, scrambler grating drum 5 and rotary axis system 8 form rotor, are fixedly connected with tested turntable, keep synchronously rotating;
Bearing seat 13 and bearing cap 14 in the first scrambler read head 3, the second scrambler read head 4, read head mount pad 6 and rotary axis system 8 form stator, are fixed by external unit, keep motionless;
Carrying out angular speed demarcates while detection, rotor and stator relatively rotate, the first scrambler read head 3, the second scrambler read head 4 and scrambler grating drum 5 form angular speed detection system, the first scrambler read head 3 and the second scrambler read head 4 read respectively the scale on scrambler grating drum 5, and by obtained data transmission to outer computer Storage and Processing, the first scrambler read head 3 and the second scrambler read head 4 use simultaneously, systematic error that can cancellation element, ensures accuracy of detection.
The present invention not detailed description is known to the skilled person technology.

Claims (4)

1. rotary axis angle speed precision is demarcated a pick-up unit, it is characterized in that comprising: adjust pedestal (1), grating drum mount pad (2), the first scrambler read head (3), the second scrambler read head (4), scrambler grating drum (5), read head mount pad (6) and rotary axis system (8);
Adjust pedestal (1), grating drum mount pad (2) and scrambler grating drum (5) and be disc structure, grating drum mount pad (2) is fixedly mounted on the top of adjusting pedestal (1); Rotary axis system (8) and scrambler grating drum (5) are all fixedly installed on grating drum mount pad (2); Described adjustment scrambler grating drum (5) is coaxially installed with rotary axis system (8), and right alignment is better than 0.003mm;
Read head mount pad (6) be fixedly connected with rotary axis system (8) and along with rotary axis system (8) rotate, the first scrambler read head (3) and the second scrambler read head (4) are installed in read head mount pad (6) bottom, the first scrambler read head (3) and the second scrambler read head (4) be 180 ° symmetrical, alignment error is no more than 1 °; The first scrambler read head (3) and the second scrambler read head (4), along with rotary axis system (8) rotates, read the scale on scrambler grating drum (5);
Read head mount pad (6) comprises the first adjustment plate (9), the second adjustment plate (17), web joint (10), the first fork plate (11) and the second fork plate (18);
The first adjustment plate (9) and second is adjusted plate (17) and is Z-type structure and has two mounting holes in lower surface, the first scrambler read head (3) is adjusted plate (9) by mounting hole with screw and first and is connected, the second scrambler read head (4) is adjusted plate (17) by mounting hole with screw and second and is connected, and regulates the spacing of the first scrambler read head (3) and the second scrambler read head (4) and scrambler grating drum (5) by changing the position of screw in mounting hole;
First adjusts plate (9), the second adjustment plate (17), the first fork plate (11) and the second fork plate (18) is all fixedly mounted on web joint (10), the first fork plate (11) and the second fork plate (18) provide spacing by outside support, guarantee that read head mount pad (6) does not rotate.
2. a kind of rotary axis angle speed precision according to claim 1 is demarcated pick-up unit, it is characterized in that: described rotary axis system (8) comprises bearing assembly (7), main shaft (12), bearing seat (13), bearing cap (14), packing ring (15) and set nut (16), main shaft (12) is hollow circuit cylinder body structure, and bearing assembly (7) comprises two identical bearings;
Bearing cap (14) is circular ring structure, bearing cap (14) is fixedly connected with bearing seat (13), bearing cap (14), bearing seat (13) form confined air cavity with main shaft (12), and bearing assembly (7) is positioned at bearing cap (14), bearing seat (13) forms confined air cavity with main shaft (12);
The week that packing ring (15) is fixedly mounted on main shaft (12) by set nut (16) laterally, set nut (16) is used in conjunction with to bearing assembly (7) and applies pretightning force elimination bearing clearance with packing ring (15), ensures the rotating accuracy of rotary axis system.
3. a kind of rotary axis angle speed precision according to claim 1 is demarcated pick-up unit, it is characterized in that: described the first scrambler read head (3), the second scrambler read head (4) and scrambler grating drum (5) composition scrambler, scrambler precision is higher than detected rotary axis precision prescribed.
4. a kind of rotary axis angle speed precision according to claim 2 is demarcated pick-up unit, it is characterized in that: two bearings in described bearing assembly (7) are accurate angular contact ball bearing and two bearings are installed 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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Publication number Priority date Publication date Assignee Title
CN105571524A (en) * 2015-12-16 2016-05-11 贵州航天计量测试技术研究所 Transmission shaft angle measurement apparatus based on circular grating
CN106556413A (en) * 2016-11-07 2017-04-05 哈尔滨工程大学 A kind of two axles 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
CN107421569A (en) * 2017-05-19 2017-12-01 中国电子科技集团公司第四十研究所 A kind of double photoelectric encoder compensation subdividing devices of High Resolution and method
CN109960870A (en) * 2019-03-21 2019-07-02 哈尔滨工业大学 Multistage components Stiffness Prediction method is equipped in the large high-speed revolution surveyed and adjusted that maximized based on contact area

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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
CN107421569A (en) * 2017-05-19 2017-12-01 中国电子科技集团公司第四十研究所 A kind of double photoelectric encoder compensation subdividing devices of High Resolution and method
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
CN109960870A (en) * 2019-03-21 2019-07-02 哈尔滨工业大学 Multistage components Stiffness Prediction method is equipped in the large high-speed revolution surveyed and adjusted that maximized based on contact area

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