CN201034725Y - Shadowless lamp illuminating value testing apparatus - Google Patents
Shadowless lamp illuminating value testing apparatus Download PDFInfo
- Publication number
- CN201034725Y CN201034725Y CNU2007200694342U CN200720069434U CN201034725Y CN 201034725 Y CN201034725 Y CN 201034725Y CN U2007200694342 U CNU2007200694342 U CN U2007200694342U CN 200720069434 U CN200720069434 U CN 200720069434U CN 201034725 Y CN201034725 Y CN 201034725Y
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- test board
- shifting axle
- shutter
- shadowless lamp
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Abstract
The utility model discloses a shadowless lamp illuminance detecting device, composed of a frame, three burner fixators, a shutter and a testboard. The side edge of the frame cushion foundation is connected with a column with a shifting shaft arranged therein; the top of the shifting shaft is connected with a C-shaped stent; the three burner fixators are connected to the C-shaped stent in equal central angles; the column is hinged with a bracket which is connected with the shutter; the frame cushion foundation is connected with a box thereon; the testboard above the box is orderly connected with a lifting cord shaft as well as a cone gear, a screw-nut complex transmission system and a lifting handle of the testboard in the box; the shifting shaft is connected with a worm gear, the cone gear, the screw-nut complex transmission system and a lifting handle of the shifting shaft in the box; the testboard is connected with a 360 degree rotatable chute into which a luminometer probe is embedded. Burners of different specifications can be tested on a single detecting device and the tested shadowless lamp is made to be at the same normal axis with the shutter and the testboard. The utility model has the advantages of simple operation and more accurate testing effect.
Description
Technical field
The utility model relates to a kind of device that detects operation shadowless lamp illumination parameter.
Background technology
Operation shadowless lamp is one of hospital operating room visual plant, its illumination and do not have performance quality such as shadow degree and will concern operation quality and patient health, thereby, international, the domestic correlated quality test stone of all having issued is as international standard (IEC 60601-2-41) and domestic standard (YY 0102～0103-93) etc.Yet at present when operation shadowless lamp is carried out above-mentioned detection, there is no corresponding more accurate, advanced pick-up unit, pick-up unit that some are simple and crude and method can't guarantee the accuracy of testing result and the repeatability of testing conditions, are unfavorable for improving the quality of products and new-product development.The detection method of present more employing is that the lamp holder with operation shadowless lamp is placed on the support, on the surface level (XY coordinate surface) at 1000mm place below the lamp holder baseplane, having under two kinds of situations of shelter and have no occluder respectively, the variation of moving illuminometer and writing down illumination reading along eight directions, or, record and calculate each illumination characteristic parameter thus along the mobile illuminometer of Z axle and the variation of writing down illumination reading.This method has the following disadvantages: the first, because the limitation of lamp holder fixing means can not realize accurately that the optical axis of lamp holder and illuminometer detecting head surface are perpendicular; Second, illuminometer is popped one's head in accurate inadequately in the tolerance of the displacement of surface level upper edge all directions or corner amount, along the mobile illuminometer probe measurement illumination of the Z axle degree of depth time, the right alignment of probe axis and optical axis can't guarantee, and the also difficult control of the definite and position repeatability of displacement; The 3rd, when the shelter test is arranged, difficult accurate location of accomplishing shelter.These deficiencies all influence the efficient and the precision of testing.In addition, because the shadowless lamp lamp holder has different specifications, material is also relatively taken up an area of and taken to the support that needs to be equipped with different size usefulness during for check.
The utility model content
The purpose of this utility model is to disclose a kind of shadowless lamp illumination testing apparatus, overcomes the following shortcoming that exists in the prior art: 1) can not detect by the lamp holder to different size on same pick-up unit, must do special-purpose testing stand if need to detect; 2) because the limitation of lamp holder fixing means causes accurately realizing that the optical axis of lamp holder and illuminometer detecting head surface are perpendicular; 3) along the mobile illuminometer probe measurement illumination of the Z axle degree of depth time, the right alignment of probe axis and optical axis can't guarantee, and the also difficult control of the definite and position repeatability of displacement; 4) when the shelter test is arranged, difficult accurate location of accomplishing shelter.These deficiencies all influence the efficient and the precision of testing.
A kind of shadowless lamp illumination testing apparatus that the utility model provides is made up of frame, lamp holder fixed mechanism, guard mechanism and four parts of test board.Frame plays the effect that connects and support miscellaneous part, and the lamp holder fixed mechanism is moved up and down along its column, so that the measurement of the degree of depth of throwing light on.The main effect of lamp holder fixed mechanism is that the shadowless lamp lamp holder (it is not of uniform size generally to show as end circular diameter) different size correctly is fixed on the pick-up unit, promptly reach the dead in line of design axis (optical axis) Yu this pick-up unit of lamp holder, to guarantee the accuracy of testing result.Guard mechanism is mainly used at different parts increases shelter, and sham operated Shi doctor head does not respectively have shadow degree parameter to the occlusion state of shadowless lamp to measure.Test board is used to place the illuminometer probe and makes it to move along eight horizontal directions and Z-direction, to measure each illumination parameter.
A kind of shadowless lamp illumination testing apparatus, by frame, lamp holder fixator, shutter and test board are formed, be characterized in: the lateral edges of gantry base is connected with column, be with shifting axle in the column, shifting axle top affixed " C " type support, three lamp holder fixators are connected on " C " type support with the central angle that equates, be connected with carriage on the column between " C " type support and the gantry base, the other end of carriage connects shutter; Be connected with square box on the gantry base, test board is above square box, the composite transmission that forms by the conical gear Meshing Pair in lifting shaft and the casing, feed screw nut is connected, and the power intake of test board jacking system is connected with the test board lifting handle; Worm and gear Meshing Pair in shifting axle and the casing is connected to this composite transmission of feed screw nut to the conical gear Meshing Pair again, and the power intake of shifting axle jacking system is connected with the shifting axle lifting handle.
The center three of the center of three formed centers of circle of evenly arranging of lamp holder fixator, shutter and test board is on same vertical axis on " C " type support, and this axis is simultaneously perpendicular to three formed planes of evenly arranging of lamp holder fixator on test board plane and " C " type support.
Described lamp holder fixator comprises loam cake, lower cover, rotation nut, mobile screw and support bar, be characterized in: mobile screw is marked with scale, the one end connects support bar, and the other end of support bar has contact, and the axes intersect of three support bars is in the center of circle of " C " type support; In loam cake, the lower cover annular recess is arranged, the linear groove is arranged at the lower cover bottom, have externally threaded mobile screw one sidewall and be connected with the convex slide block, on the external cylindrical surface of rotation nut two straight-flanked rings are arranged, embed in the annular recess of lower cover, the internal thread of rotation nut is nested with the external thread of mobile screw, and the convex slide block on the mobile screw embeds in the linear groove of lower cover bottom.
Described shutter connects by shutter connecting rod symmetry, carriage one end is connected with the pallet of band scale, there is protruding axle the pallet center, the center of shutter connecting rod is on protruding axle, the carriage other end is hinged by the guard mechanism support on bearing pin and the column, also hinged a positioning rod between carriage and guard mechanism support.
Test board has index dial, and its center, top is connected with the central point that " U " type rotates chute, and scale is arranged on the chute.
Transmission shaft one end of shifting axle gear train is connected with a pair of worm and gear Meshing Pair, the other end connects a pair of conical gear Meshing Pair, one of them conical gear is connected with the leading screw bottom, the internal thread engagement of square thread on the leading screw and column bottom, and worm screw is connected with the shifting axle lifting handle.
The transmission shaft inside of lifting shaft gear train is square thread, form a pair of feed screw nut gear train with leading screw, the leading screw lower end connects a conical gear, forms a pair of conical gear Meshing Pair with the conical gear of transmission shaft front end, and transmission shaft is connected with the test board lifting handle.
Described shifting axle and lifting shaft are screw-nut structure, and the sidewall of shifting axle and lifting shaft has locating slot respectively, corresponding column inwall and fixedly the inwall of the base aperture of lifting shaft the convex edge, location is all arranged.
The utility model device drives the kind of drive that " C " type support moves up and down, and adopts from the worm and gear to the conical gear again to this compound drive mechanism of feed screw nut; The test board elevating mechanism adopts the gear train from the conical gear to the feed screw nut, and the illuminometer probe is installed to test board, and the illuminometer probe can move in chute, chute can be done 360 ° of rotations around the axis of lifting table, and lifting table can move up and down along optical axis; Adopt locating slot and convex edge, location fit structure in the cross section of shifting axle and lifting shaft, can guarantee that shifting axle and lifting shaft only move and do not rotate along axis; Lifting shaft one side of test board bottom indicates scale, with the indication lifting distance.And the optical axis conllinear of the axis of lifting table and tested shadowless lamp; The lifting table disc surfaces indicates 0～360 ° angle index, with orientation of living in, indication chute rotation back, no matter chute is in any orientation, place the illuminometer probe in the chute all can move along chute work advance and retreat, displacement can be indicated by the scale value that is marked on the chute.
Circular shutter can use lightweight material (as lighttight papery or sheet plastic) to make, connecting rod and the carriage cantilever that connects two circular shutters should do forr a short time in the size that is subjected to light direction (≤4mm), with minimizing blocking to light.
Do when needs and to block when test, rotate up carriage when pallet is positioned at horizontal level, the pin of backstay front end just in time can insert the aperture on the carriage, forms stable triangular structure.At this moment, the pallet end face of carriage left end should keep level, and its axis should with three the formed centers of circle of evenly arranging of lamp holder fixator and the center three point on a straight line of test board, and this straight line perpendicular to three formed planes of evenly arranging of lamp holder fixator on test board plane and " C " type support, could correctly carry out occlusion detection simultaneously like this.When not doing occlusion detection, can be with the sagging placement of carriage, in order to avoid influence luminance detection.
The utility model has following advantage and good effect: first, can on same pick-up unit, detect by the lamp holder to different size, the lamp holder that is no longer necessary for every kind of specification is done special-purpose testing stand, not only save but also help the technical parameter of series of products is carried out science statistics and analysis (because the detection of under same testing conditions different product not being done is can't their testing result be compared).Second, the lamp holder fixed mechanism moves up and down the combined action of moving along the Z axle with test board along framework pillar, increased the displacement of pick-up unit on Z axle (optical axis) direction, and moving direction is parallel with the lamp holder optical axis and to remain optical axis vertical with illuminometer probe table plane, accuracy of detection is guaranteed, this pick-up unit can be detected the bigger illumination degree of depth.The 3rd, the design of guard mechanism and test board can improve the precision of detection, also makes operation more convenient.
Description of drawings
Below in conjunction with drawings and Examples the utility model is described in further detail.
Fig. 1 is a kind of shadowless lamp illumination testing apparatus one-piece construction of the utility model synoptic diagram;
Fig. 2 is the sectional perspective synoptic diagram of the utility model lamp holder fixed mechanism;
Fig. 3 is that the utility model lamp holder fixator decomposes and partial schematic sectional view;
Fig. 4 is the schematic perspective view of the utility model guard mechanism;
Fig. 5 is the schematic perspective view of the utility model test board mechanism;
Fig. 6 is the principle of work synoptic diagram that the utility model lamp holder fixed mechanism moves up and down with shifting axle;
Fig. 7 is the utility model shifting axle, lifting shaft xsect location structure synoptic diagram.
101. the lamp holder fixator, 102. shifting axles, 103. columns, 104. vertical axis, 105. shutters, 106. illuminometers probe, 107. chutes, 108. test boards, 109. shifting axle lifting handles, 110. test board lifting handles, 111. " C " shape support; 201. mobile screw, 202. contacts, 203. rotation nuts; 301. screw-nut structure, 302. convex slide blocks, 303. linear grooves; 402. the shutter connecting rod, 403. carriages, 404. backstays, 405. guard mechanism supports; 501. lifting shaft, 502. feed screw nut transmissions, 503. Bevel Gear Drive, 504. transmission shafts; 601. worm screw, 602. worm gears; 701. locating slot, convex edge, 702. location.
Embodiment
A kind of shadowless lamp illumination testing apparatus, as shown in Figure 1, by frame, lamp holder fixator 101, compositions such as shutter 105 and test board 108, be characterized in: the lateral edges of gantry base is connected with column 103, be with shifting axle 102 in the column, shifting axle top affixed one " C " type support 111, three lamp holder fixators 101 are connected on " C " type support 111 with the central angle that equates, be connected with carriage 403 on the column 103 between " C " type support and the gantry base, the other end of carriage connects shutter 105; Be connected with square box on the gantry base, test board 108 is above square box, the composite transmission that forms by the conical gear Meshing Pair in lifting shaft 501 and the casing, feed screw nut is connected, and the power intake of test board jacking system is connected with test board lifting handle 110; Worm and gear Meshing Pair in shifting axle 102 and the square box is connected to this composite transmission of feed screw nut to the conical gear Meshing Pair again, and the power intake of shifting axle jacking system is connected with shifting axle lifting handle 109.The center three of the center of three formed centers of circle of evenly arranging of lamp holder fixator, shutter and test board 108 is on same vertical axis 104 on " C " type support, and this straight line is simultaneously perpendicular to three formed planes of evenly arranging of lamp holder fixator on test board plane and " C " type support.
Lamp holder fixator such as Fig. 2, shown in Figure 3, wherein square upper and lower cover connects by screw, and is installed on " C " type support.Annular recess is arranged in the upper and lower cover, and linear groove 303 is arranged at the lower cover bottom, and having externally threaded screw rod 201 outer side-lowers has convex slide block 302, and the screw rod outside connects the support bar of a band contact 202.On the external cylindrical surface of rotation nut 203 two straight-flanked rings are arranged, in the annular recess in the upper and lower cover of packing into.Internal thread is processed in rotation nut inside, forms a pair of feed screw nut gear train with external thread on the mobile screw.Convex slide block 302 on the screw rod embeds in the linear groove 303 of lower cover bottom.
As shown in Figure 4, shutter 105 connects by shutter connecting rod 402 symmetries, the graduated pallet of carriage 403 1 end connecting bands, there is protruding axle the pallet center, the center pit of shutter connecting rod 402 is enclosed within on the protruding axle, the carriage other end is hinged by the guard mechanism support 405 on bearing pin and the column, also hinged a positioning rod 404 between carriage and guard mechanism support.
As shown in Figure 5, test board 108 sidewalls have scale, and its center, top is connected with the central point that " U " type rotates chute 107, on the chute 107 scale is arranged.Lifting shaft 501 inside are square thread, form a pair of feed screw nut transmission 502 with leading screw, the leading screw lower end connects a conical gear, forms a pair of conical gear Meshing Pair 503 with the conical gear of transmission shaft 504 front ends, and transmission shaft 504 is connected with test board lifting handle 110.
As shown in Figure 6, transverse axis one end of shifting axle 102 elevating mechanisms is connected with a worm gear 602, and the other end connects a conical gear, and the conical gear of this conical gear and leading screw bottom forms a pair of conical gear Meshing Pair; The internal thread engagement of square thread on the leading screw and shifting axle 102 bottoms forms a pair of feed screw nut transmission; Worm screw 601 is connected with shifting axle lifting handle 109.
As shown in Figure 7, shifting axle 102 and lifting shaft 501 are screw-nut structure, and the sidewall of shifting axle 102 and lifting shaft 501 has locating slot 701 respectively, corresponding column inwall and fixedly the inwall of the base aperture of lifting shaft have convex edge 702, location all arranged.
Operating process during actual detected is as follows:
1, elder generation is screwed into identical scale with the rotation nut of three lamp holder fixators, screw rod and contact are axially equidistantly advanced along it, the scale that advance distance can mark is from it read, the big glass in the bottom surface of tested shadowless lamp lamp holder is fixed on three contacts, and the arc surface of guaranteeing each contact is all tangent with the flange of lamp holder bottom surface, optical axis with the lamp holder that guarantees to be fixed overlaps with the vertical axis of 104 indications among Fig. 1, guarantees measuring accuracy.
2, illuminometer probe 106 is placed in the chute 107, chute can be done 360 ° of rotations around the axis of test board, and the axis of test board and 104 indication axis conllinear, promptly with the optical axis conllinear of tested shadowless lamp.No matter chute is in any orientation, place the illuminometer probe in the chute all can move along chute work advance and retreat, displacement can be indicated by the scale value that is marked on the chute.
3, shake the lifting handle of test board shown in Fig. 1 109, shifting axle lifting handle 110 respectively, and observe the distance scale on shifting axle 102 and the lifting shaft 114, shake the position that scale is designated as " 0 " and stop.At this moment, tested lamp holder bottom surface and illuminometer detecting head surface are the illumination E of inspection center at a distance of 1000mm
c, spot diameter d
10, spot center LFC, reach E
c50% spot diameter d
50, parameter characteristic such as no shadow degree and Illumination Distribution curve gauged distance.
4, carry out above-mentioned each parameter detecting by related standards.When needs have been done occlusion detection, should rotate up carriage 403 also is connected and fixed with backstay 404 and carriage, make the axis of carrying a tray before the carriage and optical axis conllinear, pallet table plane vertical with optical axis (at this moment, the pallet table plane should reach the distance of standard code to the distance of lamp holder baseplane, this should give assurance in designing, processing), to guarantee the correct and accurate of occlusion detection.
5, shake shifting axle lifting handle 109, test board lifting handle 110 respectively to increase or to reduce the distance of tested lamp holder bottom surface and illuminometer detecting head surface, to detect illumination degree of depth L
1And L
2Illumination degree of depth L
1And L
2Numerical value can obtain from the distance scale addition on shifting axle 112 and the lifting shaft 114.
Claims (8)
1. shadowless lamp illumination testing apparatus, by frame, lamp holder fixator, shutter and test board are formed, it is characterized in that: the lateral edges of gantry base is connected with column, be with shifting axle in the column, shifting axle top affixed " C " type support, three lamp holder fixators are connected on " C " type support with the central angle that equates, be connected with carriage on the column between " C " type support and the gantry base, the other end of carriage connects shutter; Be connected with casing on the gantry base, test board is above casing, and the composite transmission that forms by the conical gear Meshing Pair in lifting shaft and the casing, feed screw nut is connected, and the power intake of test board jacking system is connected with the test board lifting handle; Worm and gear Meshing Pair in shifting axle and the casing is connected to this composite transmission of feed screw nut to the conical gear Meshing Pair again, and the power intake of shifting axle jacking system is connected with the shifting axle lifting handle.
2. a kind of shadowless lamp illumination testing apparatus according to claim 1, it is characterized in that: the center three of the center of three formed centers of circle of evenly arranging of lamp holder fixator, shutter and test board is on same vertical axis on " C " type support, and this straight line is simultaneously perpendicular to three formed planes of evenly arranging of lamp holder fixator on test board plane and " C " type support.
3. a kind of shadowless lamp illumination testing apparatus according to claim 1, the lamp holder fixator comprises loam cake, lower cover, rotation nut, mobile screw and support bar, it is characterized in that: mobile screw is marked with scale, the one end connects support bar, the other end of support bar has contact, and the axes intersect of three support bars is in the center of circle of " C " type support; In loam cake, the lower cover annular recess is arranged, the linear groove is arranged at the lower cover bottom, has externally threaded mobile screw one sidewall and is connected with the convex slide block, and the mobile screw outer end connects support bar, and there is a structure of contact terminal support bar outer end.On the external cylindrical surface of rotation nut two straight-flanked rings are arranged, embed in the annular recess of lower cover, the internal thread of rotation nut is nested with the external thread of mobile screw, and the convex slide block on the mobile screw embeds in the linear groove of lower cover bottom.
4. a kind of shadowless lamp illumination testing apparatus according to claim 1, it is characterized in that: shutter connects by shutter connecting rod symmetry, carriage one end is connected with the pallet of band scale, there is protruding axle the pallet center, the center of shutter connecting rod is on protruding axle, the carriage other end is hinged by the guard mechanism support on bearing pin and the column, also hinged a positioning rod between carriage and guard mechanism support.
5. a kind of shadowless lamp illumination testing apparatus according to claim 1, it is characterized in that: test board has index dial, and its center, top is connected with the central point that " U " type rotates chute, and scale is arranged on the chute.
6. a kind of shadowless lamp illumination testing apparatus according to claim 1, it is characterized in that: transmission shaft one end of shifting axle gear train is connected with a pair of worm and gear Meshing Pair, the other end connects a pair of conical gear Meshing Pair, one of them conical gear is connected with the leading screw bottom, the internal thread engagement of square thread on the leading screw and column bottom, worm screw is connected with the shifting axle lifting handle.
7. a kind of shadowless lamp illumination testing apparatus according to claim 1, it is characterized in that: the transmission shaft of lifting shaft gear train is inner to be square thread, form a pair of feed screw nut gear train with leading screw, the leading screw lower end connects a conical gear, form a pair of conical gear drive with the conical gear of transmission shaft front end, transmission shaft is connected with the test board lifting handle.
8. a kind of shadowless lamp illumination testing apparatus according to claim 1, it is characterized in that: described shifting axle and lifting shaft are screw-nut structure, the sidewall of shifting axle and lifting shaft has locating slot respectively, corresponding column inwall and fixedly the inwall of the base aperture of lifting shaft the convex edge, location is all arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200694342U CN201034725Y (en) | 2007-04-27 | 2007-04-27 | Shadowless lamp illuminating value testing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200694342U CN201034725Y (en) | 2007-04-27 | 2007-04-27 | Shadowless lamp illuminating value testing apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201034725Y true CN201034725Y (en) | 2008-03-12 |
Family
ID=39195616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200694342U Expired - Fee Related CN201034725Y (en) | 2007-04-27 | 2007-04-27 | Shadowless lamp illuminating value testing apparatus |
Country Status (1)
| Country | Link |
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| CN (1) | CN201034725Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101294846B (en) * | 2007-04-27 | 2010-09-22 | 上海理工大学 | Shadowless lamp illumination testing apparatus |
| CN101907512A (en) * | 2010-06-28 | 2010-12-08 | 海洋王照明科技股份有限公司 | Lamplight source testing bracket |
| CN102564577A (en) * | 2010-12-16 | 2012-07-11 | 财团法人资讯工业策进会 | Illuminance sensing system and method |
| CN102620918A (en) * | 2012-04-16 | 2012-08-01 | 上海交通大学 | Performance measuring device of surface light source lamp |
| CN103148932A (en) * | 2013-03-14 | 2013-06-12 | 浙江煤山矿灯电源有限公司 | Device for testing luminous intensity and illumination of head lamp |
| CN104180900A (en) * | 2013-05-24 | 2014-12-03 | 深圳市海洋王照明工程有限公司 | Lamp uniform illumination testing device |
| CN109220155A (en) * | 2018-10-15 | 2019-01-18 | 中国石油大学胜利学院 | A kind of jetting type lotus root digging harvester structure |
-
2007
- 2007-04-27 CN CNU2007200694342U patent/CN201034725Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101294846B (en) * | 2007-04-27 | 2010-09-22 | 上海理工大学 | Shadowless lamp illumination testing apparatus |
| CN101907512A (en) * | 2010-06-28 | 2010-12-08 | 海洋王照明科技股份有限公司 | Lamplight source testing bracket |
| CN101907512B (en) * | 2010-06-28 | 2013-09-04 | 海洋王照明科技股份有限公司 | Lamplight source testing bracket |
| CN102564577A (en) * | 2010-12-16 | 2012-07-11 | 财团法人资讯工业策进会 | Illuminance sensing system and method |
| CN102564577B (en) * | 2010-12-16 | 2016-01-06 | 财团法人资讯工业策进会 | Illuminance sensing system and method |
| CN102620918A (en) * | 2012-04-16 | 2012-08-01 | 上海交通大学 | Performance measuring device of surface light source lamp |
| CN103148932A (en) * | 2013-03-14 | 2013-06-12 | 浙江煤山矿灯电源有限公司 | Device for testing luminous intensity and illumination of head lamp |
| CN103148932B (en) * | 2013-03-14 | 2015-01-21 | 浙江煤山矿灯电源有限公司 | Device for testing luminous intensity and illumination of head lamp |
| CN104180900A (en) * | 2013-05-24 | 2014-12-03 | 深圳市海洋王照明工程有限公司 | Lamp uniform illumination testing device |
| CN109220155A (en) * | 2018-10-15 | 2019-01-18 | 中国石油大学胜利学院 | A kind of jetting type lotus root digging harvester structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080312 |