CN217878972U - CT (computed tomography) quantity value tracing and data correcting device based on in-situ measurement - Google Patents
CT (computed tomography) quantity value tracing and data correcting device based on in-situ measurement Download PDFInfo
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- CN217878972U CN217878972U CN202220496942.3U CN202220496942U CN217878972U CN 217878972 U CN217878972 U CN 217878972U CN 202220496942 U CN202220496942 U CN 202220496942U CN 217878972 U CN217878972 U CN 217878972U
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Abstract
The utility model discloses a CT quantity value is traced to source and data correcting unit based on normal position measurement, the on-line screen storage device comprises a base, set up first backup pad and second backup pad on the base, install height-adjustable's ray source subassembly and X ray detector in first backup pad and the second backup pad respectively, be equipped with between ray source and the detector can be between it all around gliding sample platform that has the numerical control revolving stage, optical sensor light emission end and light receiving end are equipped with respectively on ray source structure and detector subassembly structure, through adjustment ray source and detector height, position and turned angle all around of sample platform, optical sensor carries out the precision measurement to the geometric characteristics of the sample bench sample, compare the data measurement value that obtains measuring result and CT scanning reconstruction, obtain the correction factor of adjustment CT scanning data amplification factor and accomplish and correct CT scanning data, the quantity value of having solved current CT reconstruction data is traced to the source problem and has promoted the geometric accuracy of CT data.
Description
Technical Field
The utility model relates to a CT detects technical field, specifically is a CT quantity value traceability and data correction device based on normal position is measured.
Background
CT is computed tomography, which uses precise and collimated X-rays, gamma rays, ultrasonic waves, etc. to perform tomography, and can inspect human bodies or objects through CT, but the existing CT instruments cannot perform fast and accurate adjustment and correction according to the positions of the human bodies or objects, and in order to solve the above mentioned problems, a CT quantity value tracing and data correcting device based on in-situ measurement is provided.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a CT quantity value is traced to source and data correction device based on normal position is measured to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a CT quantity value is traced to source and data correcting unit based on normal position is measured, the on-line screen storage device comprises a base, the upper end both sides of base fixed mounting respectively have first backup pad and second backup pad, one side slidable mounting of first backup pad orientation second backup pad has the ray source mechanism that is used for sending inspection ray, the ray source mechanism is equipped with optical sensor emission end, one side slidable mounting of second backup pad orientation first backup pad has the detector mechanism that is used for receiving inspection ray, the last optical sensor light receiving end that is equipped with of detector mechanism, base upper end slidable mounting has the sample platform that is used for placing the detection thing, sample platform slidable mounting is between first backup pad and second backup pad, the sample platform can be controlled and is slided all around between ray source and detector, the numerical control revolving stage that is used for rotating the sample under test is installed in the rotation of sample platform, the sample platform has seted up the fourth drive piece that is used for rotating numerical control revolving stage, through slip ray source mechanism, detector mechanism and sample platform, adjust the height of ray source mechanism and detector mechanism, and the horizontal position and the turned angle of sample platform.
Preferably, the one side fixedly connected with of first backup pad makes things convenient for the gliding first sliding plate of ray source mechanism, the both sides difference fixedly connected with of ray source mechanism one side is used for the first sliding block of block first sliding plate, the first fixture block of one side fixedly connected with block on first sliding plate of first sliding block, first draw-in groove with first fixture block matching is seted up to the both sides of first sliding plate, it makes ray source mechanism remove more stably to slide on first sliding plate through first sliding block, prevent through first fixture block that first sliding block breaks away from first sliding plate.
Preferably, one side of the ray source mechanism is fixedly connected with a first moving block used for sliding the ray source mechanism, chutes matched with the first moving block are formed in the first supporting plate and the first sliding plate, a first lead screw used for moving the first moving block is installed in the first supporting plate in a rotating mode, a first driving mechanism used for rotating the first lead screw is installed in the base in a fixed mode, the first driving mechanism comprises a first driven gear, a first driving gear and a first driving piece, the first driven gear is fixedly connected to the lower end of the first lead screw, the first driving gear is meshed with the first driven gear, the first driving piece is fixedly connected to the upper end of the first driving gear, the first lead screw is driven to rotate through the first driving mechanism, the first moving block is made to move, and then the ray source mechanism is made to move.
Preferably, the one side fixedly connected with of second backup pad makes things convenient for the gliding second sliding plate of detector mechanism, the both sides of detector mechanism one side fixedly connected with respectively are used for the second sliding block of block second sliding plate, the second fixture block of one side fixedly connected with block on the second sliding plate of second sliding block, the second draw-in groove that matches with the second fixture block is seted up to the both sides of second sliding plate, it makes the detector mechanism remove more stably to slide on first sliding plate through the second sliding block, prevent through the second fixture block that the second sliding block breaks away from the second sliding plate.
Preferably, one side of the detector mechanism is fixedly connected with a second moving block used for sliding the detector mechanism, sliding grooves matched with the second moving block are formed in a second supporting plate and a second sliding plate, a second lead screw used for moving the second moving block is installed in the second supporting plate in a rotating mode, a second driving mechanism used for rotating the second lead screw is installed in the base in a fixed mode, the second driving mechanism comprises a second driven gear, a second driving gear and a second driving piece, the second driven gear is fixedly connected to the lower end of the second lead screw and meshed with the second driven gear, the second driving piece is fixedly connected to the upper end of the second driving gear, the second driving mechanism drives a second rod to rotate, the second moving block is made to move, and the detector mechanism is made to move.
Preferably, the upper end fixed connection of base is used for making things convenient for the gliding third sliding plate of sample platform, and the lower extreme fixed connection of sample platform has the third sliding block that matches with the third sliding plate, through third sliding block slidable mounting on the third sliding plate, makes the sample platform remove more stably.
Preferably, the lower end of the third sliding block is fixedly connected with a third moving block used for moving the sample stage, sliding grooves matched with the third moving block are formed in the base and the third sliding plate, a third driving mechanism used for moving the third moving block is fixedly installed in the base and comprises a third lead screw and a third driving piece, the third lead screw is rotatably installed in the base, the third driving piece is fixedly connected to one end of the third lead screw, and the third moving block is moved on the third moving plate through the third driving mechanism.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses an upper end both sides of base fixed mounting respectively has first backup pad and second backup pad, first backup pad has the ray source mechanism that is used for sending inspection ray towards the one side slidable mounting of second backup pad, the last optical sensor light-emitting end that is equipped with of ray source mechanism, the one side slidable mounting of second backup pad has the detector mechanism that is used for receiving inspection ray towards the first backup pad, the last optical sensor light receiving end that is equipped with of detector mechanism, base upper end slidable mounting has the sample platform that is used for placing the detection thing, sample platform slidable mounting is between first backup pad and second backup pad, the sample platform can be controlled and slide all around between ray source and detector, the numerical control revolving stage that is used for rotating the detection thing is installed in the upper end of sample platform rotation, set up the fourth drive piece that is used for rotating the numerical control revolving stage in the sample platform, through sliding ray source mechanism, detector mechanism and sample platform, adjust the height of ray source mechanism and detector mechanism, and the horizontal position and the direction of sample platform rotate. By comparing the accurate measurement size data of the optical sensor with the CT scanning reconstruction data, the correction factor of the CT scanning reconstruction data is obtained, and the problems of source tracing and geometric size correction of the traditional CT data measurement result are solved.
Drawings
Fig. 1 is a schematic overall structure diagram of an embodiment of the present invention;
fig. 2 is an overall exploded view of an embodiment of the present invention;
fig. 3 is an enlarged view of a portion a in fig. 2 according to an embodiment of the present invention;
fig. 4 is an enlarged view of the position B in fig. 2 according to the embodiment of the present invention;
fig. 5 is an enlarged view of the point C in fig. 2 according to the embodiment of the present invention.
In the figure: 1. a base; 2. a first support plate; 21. a first sliding plate; 211. a first card slot; 22. a first lead screw; 3. a second support plate; 31. a second sliding plate; 311. a second card slot; 32. a second screw rod; 4. a radiation source mechanism; 41. a first slider; 411. a first clamping block; 42. a first moving block; 43. a light emitting end; 5. a detector mechanism; 51. a second slider; 511. a second fixture block; 52. a second moving block; 53. a light receiving end; 6. a sample stage; 61. a third sliding panel; 62. a third slider; 63. a numerical control turntable; 64. a fourth drive; 65. a third moving block; 7. a first drive mechanism; 71. a first driven gear; 72. a first drive gear; 73. a first driving member; 74. a first link; 8. a second drive mechanism; 81. a second driven gear; 82. a second driving gear; 83. a second driving member; 84. a second link; 9. a third drive mechanism; 91. a third screw rod; 92. and a third driving member.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
Example 1
Referring to fig. 1-5, the present embodiment provides a CT quantity tracing and data correcting apparatus based on in-situ measurement, which includes a base 1.
Wherein, the first backup pad 2 of upper end one side fixedly connected with of base 1, opposite side fixedly connected with second backup pad 3, first backup pad 2 has ray source mechanism 4 towards one side slidable mounting of second backup pad 3, ray source mechanism 4 has optical sensor's light emission end 43 towards the one side fixed mounting of detector mechanism 5, second backup pad 3 has detector mechanism 5 towards the one side slidable mounting of first backup pad 2, detector mechanism 5 has optical sensor's light receiving end 53 towards the one side fixed mounting of ray source mechanism 4.
In order to facilitate the radiation source mechanism 4 to slide on the first support plate 2, a first sliding block 41 is fixedly connected to the first surface of the radiation source mechanism 4 facing the first support plate 2.
Wherein, first supporting plate 2 fixedly connected with first sliding plate 21, first sliding block 41 sets up to two, is located the both sides of ray source mechanism 4 one side respectively, and two first sliding block 41 centre gripping first sliding plate 21's both sides make ray source mechanism 4 can slide from top to bottom in the one side of first supporting plate 2 through first sliding block 41.
In order to move the radiation source mechanism 4, a first moving block 42 is fixedly connected to one surface of the radiation source mechanism 4.
The first sliding plate 21 and the first supporting plate 2 are both provided with sliding grooves, the first moving block 42 is slidably mounted in the sliding grooves, the first lead screw 22 is rotatably mounted in the sliding groove of the first supporting plate 2, the first moving block 42 is provided with a threaded hole, the first moving block 42 is mounted on the first lead screw 22 through the threaded hole, and the first moving block 42 is driven to slide up and down in the sliding groove by rotating the first lead screw 22, so that the first sliding plate 21 moves and the ray source mechanism 4 is driven to move.
In order to rotate the first lead screw 22 conveniently, a first driving mechanism 7 is installed in the base 1.
The first driving mechanism 7 includes a first driven gear 71, a first driving gear 72, and a first driving member 73.
First driven gear 71 and first driving gear 72 are rotatably mounted in base 1 and are meshed with each other, the lower end of first lead screw 22 is fixedly connected to the upper end of first driven gear 71, first driving member 73 is fixedly connected to the upper end of first driving gear 72, and first connecting rod 74 is fixedly connected between first driving member 73 and first driving gear 72.
The first driving member 73 is preferably a motor, and the motor is started to drive the first driving gear 72 to rotate, so that the engaged first driven gear 71 rotates, and the first lead screw 22 is further driven to rotate.
In order to facilitate the sliding of the detector mechanism 5 on the second support plate 3, a second sliding block 51 is fixedly connected to the first surface of the detector mechanism 5 facing the second support plate 3.
The second support plate 3 is fixedly connected with the second sliding plates 31, the two second sliding blocks 51 are respectively located on two sides of one surface of the detector mechanism 5, the two second sliding blocks 51 clamp two sides of the second sliding plates 31, and the detector mechanism 5 can slide up and down on one surface of the second support plate 3 through the second sliding blocks 51.
To facilitate movement of the detector mechanism 5, a second moving block 52 is fixedly connected to one face of the detector mechanism 5.
The second sliding plate 31 and the second support plate 3 are both provided with sliding grooves, the second moving block 52 is slidably mounted in the sliding grooves, the second lead screw 32 is rotatably mounted in the sliding groove of the second support plate 3, the second moving block 52 is provided with a threaded hole, the second moving block 52 is mounted on the second lead screw 32 through the threaded hole, and the second lead screw 32 is rotated to drive the second moving block 52 to slide up and down in the sliding groove, so that the second sliding plate 31 moves and the detector mechanism 5 is driven to move.
In order to rotate the second screw 32 conveniently, a second driving mechanism 8 is installed in the base 1.
The second driving mechanism 8 includes a second driven gear 81, a second driving gear 82, and a first driving member 73.
The second driven gear 81 and the second driving gear 82 are rotatably mounted in the base 1 and are meshed with each other, the lower end of the second lead screw 32 is fixedly connected to the upper end of the second driven gear 81, the first driving part 73 is fixedly connected to the upper end of the second driving gear 82, and a second connecting rod 84 is fixedly connected between the second driving part 83 and the second driving gear 82.
The second driving member 83 also preferably uses a motor, and the motor is started to drive the second driving gear 82 to rotate, so that the engaged second driven gear 81 rotates, and the second lead screw 32 is further driven to rotate.
In order to conveniently detect articles or human bodies, a sample table 6 is slidably mounted on the base 1.
The sample stage 6 is slidably mounted between the radiation source mechanism 4 and the detector mechanism 5, and the distance between the detected object and the radiation source mechanism 4 and the detector mechanism 5 is adjusted by moving the sample stage 6.
In order to move the sample stage 6 conveniently, a third sliding plate 61 is fixedly connected to the upper end of the base 1.
The lower end of the sample stage 6 is fixedly connected with a third sliding block 62 which can be clamped and slidably mounted on the third sliding plate 61, and the third sliding block 62 slides on the third sliding plate 61 to drive the sample stage 6 to move on the base 1.
In order to move the third slide block 62, a third moving block 65 is fixedly connected to the lower end of the third slide block 62, and a third driving mechanism 9 for moving the third moving block 65 is installed in the base 1.
The third sliding plate 61 and the base 1 are both provided with sliding grooves for facilitating the sliding of the third moving block 65, and the third driving mechanism 9 is installed in the sliding grooves of the base 1.
The third driving mechanism 9 includes a third lead screw 91 and a third driving member 92, the third moving block 65 is provided with a thread groove matched with the third lead screw 91, and is mounted on the third lead screw 91 through the thread groove, and the third moving block 65 is driven to move by rotating the third lead screw 91.
The third driving member 92 is fixedly installed in the base 1, and preferably a motor is also used, one end of the third lead screw 91 is fixedly connected to an output shaft of the third driving member 92, and the third lead screw 91 is driven to rotate by starting the third driving member 92.
In order to make the detected object receive the examination more comprehensively, the upper end of the sample table 6 is rotatably provided with a numerical control rotary table 63.
The sample table 6 is internally and fixedly provided with a fourth driving part 64 for rotating the numerical control turntable 63, the fourth driving part 64 preferably adopts a motor, and the fourth driving part 64 is started to drive the numerical control turntable 63 to rotate, so that the detected object can be inspected in 360 degrees around.
The optical sensor composed of the light emitting end 43 and the light receiving end 53 is used for precisely measuring the geometric size characteristics of the article on the sample stage 6, and the measurement result is compared with the data measurement value obtained by CT scanning reconstruction to obtain a correction factor for adjusting the amplification factor of the CT scanning data, thereby realizing the correction of the CT scanning data.
The light emitting end 43 and the light receiving end 53 of different models can be replaced according to the size of the detected article by the first sliding plate 21 and the second sliding plate 31.
The detection object can be fixed on the sample table 6 through viscose or a sample clamp made of a material with the density lower than that of the detection object, so that the detection object is ensured to be fixed on the numerical control rotary table 63.
Through calibrating in advance to light emission end 43, adjust the position distance and the measured sample angle of sample platform 6 and ray source mechanism 4, make the geometric dimensions characteristic of sample platform 6 upper end detection article can be measured by optical sensor is accurate.
The method comprises the steps of starting a light emitting end 43 and a light receiving end 53, adjusting the heights of a radiation source mechanism 4 and a detector mechanism 5 and the distance between a sample stage 6 and the radiation source mechanism 4, generating a two-dimensional projection of clearly measurable target geometric size characteristics through the light receiving end 53, completing high-precision on-machine measurement of the target geometric size characteristics of a detected object, transmitting a measurement result to a data processing computer, mounting an X-ray sensor through the light emitting end 43, performing CT scanning on the detected object through the X-ray sensor, transmitting CT scanning data to the data processing computer, completing three-dimensional reconstruction of the CT data through the data processing computer, measuring the size of the target geometric size characteristics in a three-dimensional model generated by reconstruction, comparing the size with accurate measurement data obtained by measuring through a light sensor, obtaining a correction coefficient of geometric size magnification of the model obtained by CT scanning, and correcting the whole CT scanning data by using the correction coefficient to obtain metering-level traceable CT data.
Example 2
Referring to fig. 3-4, a further improvement is made on the basis of embodiment 1:
in order to prevent the radiation source mechanism 4 from separating from the first support plate 2 and the detector mechanism 5 from separating from the second support plate 3, a first fixture block 411 is fixedly connected to one side of the first sliding block 41, and a second fixture block 511 is fixedly connected to one side of the second sliding block 51.
First clamping grooves 211 are formed in two sides of the first sliding plate 21, the first clamping block 411 is slidably mounted in the first clamping grooves 211 and clamped in the first clamping grooves 211 through the first clamping block 411, and therefore the radiation source mechanism 4 is prevented from being separated from the first supporting plate 2.
The second sliding plate 31 has second engaging grooves 311 formed on both sides thereof, and the second engaging block 511 is slidably mounted in the second engaging groove 311, and is engaged with the second engaging groove 311 via the second engaging block 511, so as to prevent the detector mechanism 5 from being disengaged from the second supporting plate 3.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a CT quantity value traceability and data correcting unit based on in situ measurement, includes base (1), its characterized in that: a first supporting plate (2) and a second supporting plate (3) are fixedly mounted on two sides of the upper end of the base (1) respectively, a ray source mechanism (4) is mounted on one surface, facing the second supporting plate (3), of the first supporting plate (2) in a sliding mode, and a detector mechanism (5) used for receiving X rays is mounted on one surface, facing the first supporting plate (2), of the second supporting plate (3) in a sliding mode;
a light emitting end (43) of an optical sensor is fixedly arranged on one surface of the ray source mechanism (4) facing the detector mechanism (5), and a light receiving end (53) of the optical sensor is fixedly arranged on one surface of the detector mechanism (5) facing the ray source mechanism (4);
the device is characterized in that a sample table (6) used for placing a sample to be measured is arranged at the upper end of the base (1) in a sliding mode, the sample table (6) is arranged between the first supporting plate (2) and the second supporting plate (3) in a sliding mode and can be controlled to slide back and forth and left and right between the ray source and the detector, a numerical control rotary table (63) used for rotating the sample is arranged at the upper end of the sample table (6) in a rotating mode, and a fourth driving part (64) used for rotating the numerical control rotary table (63) is arranged in the sample table (6).
2. The in-situ measurement-based CT quantity traceability and data correction device as claimed in claim 1, wherein: one side of the first supporting plate (2) is fixedly connected with a first sliding plate (21) which is convenient for the ray source mechanism (4) to slide, two sides of one side of the ray source mechanism (4) are respectively and fixedly connected with a first sliding block (41) which is used for clamping the first sliding plate (21), one side of the first sliding block (41) is fixedly connected with a first clamping block (411) which is clamped on the first sliding plate (21), two sides of the first sliding plate (21) are provided with a first clamping groove (211) which is matched with the first clamping block (411), and a light emitting end (43) of the optical sensor is fixed on the ray source mechanism (4) by adopting a clamping groove and threaded connection.
3. The in-situ measurement-based CT magnitude traceability and data correction device of claim 2, wherein: one surface of the radiation source mechanism (4) is fixedly connected with a first moving block (42) used for sliding the radiation source mechanism (4), sliding grooves matched with the first moving block (42) are formed in the first supporting plate (2) and the first sliding plate (21), a first lead screw (22) used for moving the first moving block (42) is rotatably mounted in the first supporting plate (2), a first driving mechanism (7) used for rotating the first lead screw (22) is fixedly mounted in the base (1), the first driving mechanism (7) comprises a first driven gear (71), a first driving gear (72) and a first driving piece (73), the first driven gear (71) is fixedly connected to the lower end of the first lead screw (22), the first driving gear (72) is meshed with the first driven gear (71), and the first driving piece (73) is fixedly connected to the upper end of the first driving gear (72).
4. The in-situ measurement-based CT magnitude traceability and data correction device of claim 1, wherein: one side of the second supporting plate (3) is fixedly connected with a second sliding plate (31) which facilitates the sliding of the detector mechanism (5), two sides of one side of the detector mechanism (5) are respectively and fixedly connected with a second sliding block (51) which is used for clamping the second sliding plate (31), one side of the second sliding block (51) is fixedly connected with a second clamping block (511) which is clamped on the second sliding plate (31), two sides of the second sliding plate (31) are provided with second clamping grooves (311) which are matched with the second clamping blocks (511), and a light receiving end (53) of the optical sensor is fixed on the detector mechanism (5) through clamping grooves and threaded connection.
5. The device for CT magnitude traceability and data correction based on in-situ measurement as claimed in claim 4, wherein: one side of the detector mechanism (5) is fixedly connected with a second moving block (52) used for sliding the detector mechanism (5), sliding grooves matched with the second moving block (52) are formed in a second supporting plate (3) and a second sliding plate (31), a second lead screw (32) used for moving the second moving block (52) is installed in the second supporting plate (3) in a rotating mode, a second driving mechanism (8) used for rotating the second lead screw (32) is installed in the base (1) in a fixed mode, the second driving mechanism (8) comprises a second driven gear (81), a second driving gear (82) and a second driving piece (83), the second driven gear (81) is fixedly connected to the lower end of the second lead screw (32), the second driving gear (82) is meshed with the second driven gear (81), and the second driving piece (83) is fixedly connected to the upper end of the second driving gear (82).
6. The in-situ measurement-based CT magnitude traceability and data correction device of claim 5, wherein: the upper end of the base (1) is fixedly connected with a third sliding plate (61) which is used for facilitating the sliding of the sample table (6), and the lower end of the sample table (6) is fixedly connected with a third sliding block (62) matched with the third sliding plate (61).
7. The device for CT magnitude traceability and data correction based on in-situ measurement as claimed in claim 6, wherein: the lower end of the third sliding block (62) is fixedly connected with a third moving block (65) used for moving the sample stage (6), sliding grooves matched with the third moving block (65) are formed in the base (1) and the third sliding block (61), a third driving mechanism (9) used for moving the third moving block (65) is fixedly installed in the base (1), the third driving mechanism (9) comprises a third screw rod (91) and a third driving piece (92), the third screw rod (91) is rotatably installed in the base (1), and the third driving piece (92) is fixedly connected to one end of the third screw rod (91).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220496942.3U CN217878972U (en) | 2022-03-09 | 2022-03-09 | CT (computed tomography) quantity value tracing and data correcting device based on in-situ measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220496942.3U CN217878972U (en) | 2022-03-09 | 2022-03-09 | CT (computed tomography) quantity value tracing and data correcting device based on in-situ measurement |
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| CN217878972U true CN217878972U (en) | 2022-11-22 |
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| CN202220496942.3U Active CN217878972U (en) | 2022-03-09 | 2022-03-09 | CT (computed tomography) quantity value tracing and data correcting device based on in-situ measurement |
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| CN (1) | CN217878972U (en) |
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Effective date of registration: 20230103 Address after: 310000 b101-1, building 1, No.3, Taiji Road, Yuhang Economic and Technological Development Zone, Yuhang District, Hangzhou City, Zhejiang Province Patentee after: Hangzhou nengchuang Hi Tech Co.,Ltd. Address before: 310000 b101-2, building 1, No.3, Taiji Road, Yuhang Economic and Technological Development Zone, Yuhang District, Hangzhou City, Zhejiang Province Patentee before: Hangzhou new geek Measurement Technology Co.,Ltd. |
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