CN113686485B - Pressure sensor detection device - Google Patents
Pressure sensor detection device Download PDFInfo
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- CN113686485B CN113686485B CN202110848751.9A CN202110848751A CN113686485B CN 113686485 B CN113686485 B CN 113686485B CN 202110848751 A CN202110848751 A CN 202110848751A CN 113686485 B CN113686485 B CN 113686485B
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- 238000001514 detection method Methods 0.000 title claims abstract description 15
- 230000007246 mechanism Effects 0.000 claims abstract description 98
- 238000000034 method Methods 0.000 claims abstract description 9
- 230000008569 process Effects 0.000 claims abstract description 8
- 230000003139 buffering effect Effects 0.000 abstract description 3
- 238000005299 abrasion Methods 0.000 abstract description 2
- 230000006872 improvement Effects 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 241000252254 Catostomidae Species 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L25/00—Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L27/00—Testing or calibrating of apparatus for measuring fluid pressure
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a pressure sensor detection device, which structurally comprises a connecting plate, a buckling plate, a pressure mechanism, a guide rod and a base, wherein the buckling plate is arranged on the outer side of the connecting plate, the upper end of the pressure mechanism is fixed with the middle end of the buckling plate, the inner sloping plates on the two sides are simultaneously pressed close to the outer side of a pressure sensor on a placement mechanism, at the moment, the two ends of the outer side of the pressure sensor are elastically pressed against each other by the pressing plates, the pressure sensor is prevented from inclining and sinking in the pressure detection process of pressing the pressure sensor, the pressure sensor is vertically arranged in the placement cavity, the spring rod is elastically and downwards slid through a lower sliding block, the whole lower pressing ring is driven to stably descend, the abrasion of threads and internal threads at the lower end of the pressure sensor is prevented from occurring, the pressure rod is prevented from buffering and downwards pressing in the spring pipe sleeve, the sucker is in vacuum fit with the bottom surface of the pressure sensor, and the bottom of the pressure sensor is ensured to be vertically fixed with the sinking plate.
Description
Technical Field
The invention relates to the field of sensor detection, in particular to a pressure sensor detection device.
Background
After the pressure sensor is produced, the pressure sensor is required to be pressurized and detected, the pressure sensor is vertically placed on the detecting device, then the lower pressure plate is driven by a standard pressure source to descend, pressure is applied to the sensor, the sensor is calibrated and detected according to the pressure and the variation of an output signal, but the lower end of the pressure sensor is of a threaded rod structure and is arranged on the detecting device in a spiral mode, the contact area between the vertically placed pressure sensor and the lower pressure plate is small, the pressure sensor is inclined and sunk on the detecting device easily due to the fact that the lower pressure plate is pressed down, the vertical pressure applied by the lower pressure plate to the pressure sensor is reduced, accordingly the accuracy of pressure detection is reduced, meanwhile, the threaded rod structure at the lower end of the pressure sensor and threads inside the detecting device produce large downward friction, and abrasion is caused by the threaded rod at the lower end of the pressure sensor.
Disclosure of Invention
The technical scheme adopted for realizing the technical purpose of the invention is as follows: this pressure sensor detection device, its structure includes connecting plate, buckling plate, pressure mechanism, guide bar, base, the connecting plate outside is equipped with buckling plate to pressure mechanism upper end is fixed mutually with buckling plate middle-end, the pressure mechanism lower extreme is established at base up end middle part, the guide bar top adopts clearance fit to run through inside the connecting plate, the guide bar lower extreme welds with the base up end mutually, pressure mechanism includes pushing down mechanism, placement machine constructs, pushing down mechanism lower extreme runs through in buckling plate middle-end to pushing down the mechanism and being located placement machine and construct directly over, placement machine constructs bottom and base up end and fix mutually.
As a further improvement of the invention, the pushing mechanism comprises a pressure plate, sliding blocks and a pushing mechanism, wherein the lower end of the pressure plate penetrates through the middle end of the buckling plate, the sliding blocks are slidably arranged inside the outer side end of the pressure plate, the sliding blocks are welded with the inner side end of the pushing mechanism, the pushing mechanism is positioned outside the lower end of the pressure plate, two pushing mechanisms are arranged in total and are positioned at the left end and the right end of the outer side of the pressure plate, and three sliding blocks are arranged on the inner side surface of each pushing mechanism.
As a further improvement of the invention, the abutting mechanism comprises a limiting plate, a connecting shaft, an inner sloping plate and an abutting piece, wherein the inner side surface of the limiting plate is fixed with the sliding block, the limiting plate is positioned at the outer side of the lower end of the pressure plate, the inner side of the limiting plate is hinged with the upper end of the inner sloping plate through the connecting shaft, the abutting piece is arranged at the inner side end of the inner sloping plate in a clearance fit manner, the inner sloping plate is arranged at the inner side of the limiting plate at a low inclination angle with the high inner side end at the outer side end, and a spring is further arranged at the joint of the abutting piece and the inner side of the inner sloping plate.
As a further improvement of the invention, the placing mechanism comprises a bottom plate, a placing cavity, a locking mechanism and a buffer mechanism, wherein the bottom surface of the bottom plate is fixed with the middle part of the upper end surface of the base, the placing cavity is arranged at the upper end of the bottom plate, the locking mechanism is slidably arranged in the placing cavity, the buffer mechanism is arranged on the upper end surface of the bottom plate and is positioned in the placing cavity, the buffer mechanism is positioned under the locking mechanism, and the bottom plate and the placing cavity are arranged at a vertical angle.
As a further improvement of the invention, the locking mechanism comprises a lower pressing ring, an internal thread, a lower sliding block and a spring rod, wherein the lower pressing ring is positioned at the inner side of the placing cavity, the internal thread is arranged on the inner side surface of the lower pressing ring, the lower sliding block is welded at the outer side end of the lower pressing ring, the upper end of the spring rod penetrates through the lower sliding block in a clearance fit manner, the spring rod is fixedly arranged in the placing cavity, the lower pressing ring is positioned right above the buffer mechanism, the internal thread is matched with the external thread at the lower end of the pressure sensor, and the lower sliding block and the spring rod are respectively provided with two parts which are respectively arranged at the left side and the right side of the lower pressing ring.
As a further improvement of the invention, the buffer mechanism comprises a sinking plate, a pressing rod, a spring pipe sleeve, telescopic hoses and suckers, wherein the pressing rod is arranged on the bottom surface of the sinking plate, the lower end of the pressing rod is arranged in the spring pipe sleeve, the middle end of the bottom of the sinking plate is provided with the telescopic hoses, the suckers are arranged on the upper end surface of the sinking plate and communicated with the telescopic hoses, the pressing rod and the spring pipe sleeve are respectively provided with four, and the telescopic hoses are of a fold-shaped structure and made of rubber materials and have certain rebound resilience.
The invention has the beneficial effects that:
1. through the rotation of connecting axle is connected to make the inclination of interior swash plate change, press close to in the interior swash plate through both sides simultaneously toward the pressure sensor outside on the mechanism of placing, the conflict piece is carried out elasticity to pressure sensor outside both ends and is contradicted at this moment, ensures that the conflict piece carries out inseparable conflict to pressure sensor outside both ends, avoids the pressure board to take place the slope to sink to the in-process that carries out pressure detection to pressure sensor pushes down, ensures that the pressure board carries out vertical push down to pressure sensor and detects.
2. The vertical installation of pressure sensor is placing the intracavity portion, carries out elasticity gliding on the spring beam through the slider down, has driven down the clamping ring wholly and has carried out steady decline, avoids the screw thread and the internal thread of pressure sensor lower extreme to take place wearing and tearing, carries out buffering pushing down in the spring pipe cover inside through the depression bar, and the sucking disc carries out vacuum laminating with the pressure sensor bottom surface, ensures that pressure sensor bottom and sinking plate carry out vertical fixedly, avoids pressure sensor to receive the subsidence that produces the slope after the pressure.
Drawings
Fig. 1 is a schematic structural diagram of a pressure sensor detection device according to the present invention.
Fig. 2 is a schematic structural view of a pressure mechanism according to the present invention.
Fig. 3 is a schematic top view of an internal structure of a pressing mechanism according to the present invention.
Fig. 4 is a schematic top view of an interference mechanism according to the present invention.
Fig. 5 is a schematic view of the internal structure of a placement mechanism according to the present invention.
Fig. 6 is a schematic perspective view of a locking mechanism according to the present invention.
Fig. 7 is a schematic structural diagram of a buffering mechanism according to the present invention.
In the figure: the connecting plate-1, the buckling plate-2, the pressure mechanism-3, the guide rod-4, the base-5, the pushing mechanism-31, the placing mechanism-32, the pressure plate-311, the sliding block-312, the abutting mechanism-313, the limiting plate-13 a, the connecting shaft-13 b, the inner sloping plate-13 c, the abutting piece-13 d, the bottom plate-321, the placing cavity-322, the locking mechanism-323, the buffer mechanism-324, the pushing ring-23 a, the inner screw-23 b, the pushing block-23 c, the spring rod-23 d, the sinking plate-24 a, the pressing rod-24 b, the spring tube sleeve-24 c, the telescopic hose-24 d and the sucker-24 e.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
example 1:
as shown in fig. 1 to 4:
the invention relates to a pressure sensor detection device, which structurally comprises a connecting plate 1, a buckling plate 2, a pressure mechanism 3, a guide rod 4 and a base 5, wherein the buckling plate 2 is arranged on the outer side of the connecting plate 1, the upper end of the pressure mechanism 3 is fixed with the middle end of the buckling plate 2, the lower end of the pressure mechanism 3 is arranged in the middle of the upper end face of the base 5, the top of the guide rod 4 penetrates through the connecting plate 1 in a clearance fit manner, the lower end of the guide rod 4 is welded with the upper end face of the base 5, the pressure mechanism 3 comprises a pressing mechanism 31 and a placing mechanism 32, the lower end of the pressing mechanism 31 penetrates through the middle end of the buckling plate 2, the pressing mechanism 31 is positioned right above the placing mechanism 32, and the bottom of the placing mechanism 32 is fixed with the upper end face of the base 5.
The pressing mechanism 31 includes a pressure plate 311, a slider 312, and a pressing mechanism 313, where the lower end of the pressure plate 311 penetrates through the middle end of the buckling plate 2, the slider 312 is slidably mounted inside the outer end of the pressure plate 311, the slider 312 is welded to the inner end of the pressing mechanism 313, the pressing mechanism 313 is located outside the lower end of the pressure plate 311, the two pressing mechanisms 313 are provided together and located at the left and right ends of the outer side of the pressure plate 311, three sliders 312 are provided on the inner side surface of each pressing mechanism 313, so that the pressing mechanism 313 slides up and down outside the pressure plate 311, and the pressing mechanism 313 can slide up and down outside the placement mechanism 32 in the pressing process.
Wherein, the conflict mechanism 313 includes limiting plate 13a, connecting axle 13b, interior swash plate 13c, conflict piece 13d, limiting plate 13a inboard surface is fixed with slider 312 to limiting plate 13a is located the pressure plate 311 lower extreme outside, limiting plate 13a inboard is articulated with interior swash plate 13c upper end through connecting axle 13b, conflict piece 13d adopts clearance fit to install including swash plate 13c inboard end, interior swash plate 13c is the high inboard low inclination of side and installs in limiting plate 13a inboard, do benefit to the pressure sensor that places on the mechanism 32 and incline conflict, the junction of conflict piece 13d and interior swash plate 13c inside still is equipped with the spring, does benefit to conflict piece 13d and carries out elastic extrusion including swash plate 13c to ensure that conflict piece 13d carries out closely conflict to the pressure sensor outside.
Specific use and action of the embodiment:
in the invention, the lower end of the pressure sensor is arranged in the placement mechanism 32, then the pressure source outside drives the pressure plate 311 to press down, in the pressing down process, the lower end of the limiting plate 13a is in contact with the outer side of the placement mechanism 32, so that the sliding block 312 slides in the inner side of the outer side end of the pressure plate 311, the height of the limiting plate 13a is adjusted, at the moment, the inclination angle of the inner inclined plate 13c is changed through the rotating connection of the connecting shaft 13b, the inner inclined plates 13c at the two sides are simultaneously pressed close to the outer side of the pressure sensor on the placement mechanism 32, at the moment, the two ends of the outer side of the pressure sensor are elastically contacted by the contact piece 13d, the two ends of the outer side of the pressure sensor are tightly contacted by the contact piece 13d, and the same contact force is applied to the two ends of the outer side of the pressure sensor, so that the pressure plate 311 is prevented from inclining and sinking in the pressing down process of the pressure sensor, and the pressure sensor is vertically pressed down.
Example 2:
as shown in fig. 5 to 7:
the placing mechanism 32 comprises a bottom plate 321, a placing cavity 322, a locking mechanism 323 and a buffer mechanism 324, wherein the bottom surface of the bottom plate 321 is fixed with the middle of the upper end face of the base 5, the placing cavity 322 is arranged at the upper end of the bottom plate 321, the locking mechanism 323 is slidably mounted inside the placing cavity 322, the buffer mechanism 324 is arranged on the upper end face of the bottom plate 321, the buffer mechanism 324 is positioned inside the placing cavity 322, the buffer mechanism 324 is positioned under the locking mechanism 323, the bottom plate 321 is vertically arranged at an angle with the placing cavity 322, and the pressure sensor is vertically arranged inside the placing cavity 322.
The locking mechanism 323 includes a lower pressing ring 23a, an internal thread 23b, a lower sliding block 23c, and a spring rod 23d, where the lower pressing ring 23a is located inside the placing cavity 322, the internal thread 23b is disposed on the inner surface of the lower pressing ring 23a, the lower sliding block 23c is welded at the outer end of the lower pressing ring 23a, the upper end of the spring rod 23d is inserted into the lower sliding block 23c by adopting clearance fit, the spring rod 23d is fixedly installed inside the placing cavity 322, the lower pressing ring 23a is located right above the buffer mechanism 324, the internal thread 23b is matched with the external thread of the lower end of the pressure sensor, so that the lower pressing ring 23a is easily installed inside the lower pressing ring 23a, and the lower sliding block 23c and the spring rod 23d are both provided with two, and are respectively disposed on the left side and right side of the lower pressing ring 23a, so that the lower pressing ring 23a can drive the pressure sensor to perform stable vertical descent in the placing cavity 322, thereby making the pressure sensor perform stable vertical sinking buffer.
The buffer mechanism 324 includes a sinking plate 24a, a compression bar 24b, a spring tube sleeve 24c, a flexible tube 24d, and a suction cup 24e, where the bottom surface of the sinking plate 24a is provided with the compression bar 24b, and the lower end of the compression bar 24b is installed inside the spring tube sleeve 24c, the middle end of the bottom of the sinking plate 24a is provided with the flexible tube 24d, the suction cup 24e is provided on the upper end surface of the sinking plate 24a, and the suction cup 24e is communicated with the flexible tube 24d, the compression bar 24b and the spring tube sleeve 24c are respectively provided with four positions of the bottom of the sinking plate 24a, so as to facilitate the sinking buffer of the sinking plate 24a, the flexible tube 24d is in a fold structure, and adopts a rubber material, has a certain rebound resilience, and facilitates the change of internal air pressure at the same time, so that the suction cup 24e is attached to the bottom of the pressure sensor in vacuum, the bottom of the pressure sensor is ensured to be fixed vertically, and the pressure sensor is prevented from being inclined after being stressed.
Specific use and action of the embodiment:
according to the invention, the lower end of the pressure sensor is screwed into the lower pressure ring 23a, the external thread at the lower end of the pressure sensor is matched with the internal thread 23b in a threaded manner, so that the pressure sensor is vertically arranged in the placing cavity 322, the pressure sensor receives the downward pressure in the pressure detection process, at the moment, the lower slider 23c elastically slides down on the spring rod 23d, the whole lower pressure ring 23a is driven to stably descend, the threads at the lower end of the pressure sensor and the internal thread 23b are prevented from being worn, the bottom of the pressure sensor simultaneously pushes down the sinking plate 24a, the buffer downward pressure is carried out in the spring sleeve 24c through the pressure rod 24b, and the flexible hose 24d elastically contracts, so that the sucker 24e is in vacuum fit with the bottom of the pressure sensor, the bottom of the pressure sensor is ensured to be vertically fixed with the sinking plate 24a, and inclined sinking of the pressure sensor is prevented from being generated after the pressure is applied.
By utilizing the technical scheme of the invention or under the inspired by the technical scheme of the invention, a similar technical scheme is designed by a person skilled in the art, so that the technical effects are achieved, and the technical scheme falls into the protection scope of the invention.
Claims (1)
1. The utility model provides a pressure sensor detection device, its structure includes connecting plate (1), buckling plate (2), pressure mechanism (3), guide bar (4), base (5), the connecting plate (1) outside is equipped with buckling plate (2) to pressure mechanism (3) upper end is fixed mutually with buckling plate (2) middle-end, pressure mechanism (3) lower extreme is established at base (5) up end middle part, guide bar (4) top adopts clearance fit to run through inside connecting plate (1), guide bar (4) lower extreme and base (5) up end are welded mutually, its characterized in that:
the pressure mechanism (3) comprises a pressing mechanism (31) and a placing mechanism (32), wherein the lower end of the pressing mechanism (31) penetrates through the middle end of the buckling plate (2), the pressing mechanism (31) is positioned right above the placing mechanism (32), and the bottom of the placing mechanism (32) is fixed with the upper end face of the base (5);
the pressing mechanism (31) comprises a pressure plate (311), a sliding block (312) and a collision mechanism (313), wherein the lower end of the pressure plate (311) penetrates through the middle end of the buckling plate (2), the sliding block (312) is slidably arranged inside the outer side end of the pressure plate (311), the sliding block (312) is welded with the inner side end of the collision mechanism (313), and the collision mechanism (313) is positioned outside the lower end of the pressure plate (311);
the abutting mechanism (313) comprises a limiting plate (13 a), a connecting shaft (13 b), an inner inclined plate (13 c) and an abutting piece (13 d), wherein the inner side surface of the limiting plate (13 a) is fixed with a sliding block (312), the limiting plate (13 a) is positioned at the outer side of the lower end of the pressure plate (311), the inner side of the limiting plate (13 a) is hinged with the upper end of the inner inclined plate (13 c) through the connecting shaft (13 b), and the abutting piece (13 d) is installed at the inner side end of the inner inclined plate (13 c) in a clearance fit manner;
the placing mechanism (32) comprises a bottom plate (321), a placing cavity (322), a locking mechanism (323) and a buffer mechanism (324), wherein the bottom surface of the bottom plate (321) is fixed with the middle part of the upper end surface of the base (5), the placing cavity (322) is arranged at the upper end of the bottom plate (321), the locking mechanism (323) is slidably arranged in the placing cavity (322), the buffer mechanism (324) is arranged on the upper end surface of the bottom plate (321), the buffer mechanism (324) is positioned in the placing cavity (322), and the buffer mechanism (324) is positioned under the locking mechanism (323);
the locking mechanism (323) comprises a lower pressing ring (23 a), an inner thread (23 b), a lower sliding block (23 c) and a spring rod (23 d), wherein the lower pressing ring (23 a) is positioned at the inner side of the placing cavity (322), the inner side surface of the lower pressing ring (23 a) is provided with the inner thread (23 b), the outer side end of the lower pressing ring (23 a) is welded with the lower sliding block (23 c), the upper end of the spring rod (23 d) penetrates through the inner part of the lower sliding block (23 c) in a clearance fit manner, the spring rod (23 d) is fixedly installed inside the placing cavity (322), and the lower pressing ring (23 a) is positioned right above the buffer mechanism (324);
the buffer mechanism (324) comprises a sinking plate (24 a), a pressing rod (24 b), a spring pipe sleeve (24 c), a telescopic hose (24 d) and a sucking disc (24 e), wherein the pressing rod (24 b) is arranged on the bottom surface of the sinking plate (24 a), the lower end of the pressing rod (24 b) is arranged inside the spring pipe sleeve (24 c), the middle end of the bottom of the sinking plate (24 a) is provided with the telescopic hose (24 d), and the sucking disc (24 e) is arranged on the upper end surface of the sinking plate (24 a) and is communicated with the telescopic hose (24 d);
the lower end of the pressure sensor is arranged inside the placement mechanism (32), then the pressure source on the outer side drives the pressure plate (311) to press downwards, in the pressing process, the lower end of the limiting plate (13 a) is in contact with the outer side of the placement mechanism (32), so that the sliding block (312) slides inside the outer side end of the pressure plate (311), the height of the limiting plate (13 a) is adjusted, at the moment, the inclination angle of the inner inclined plate (13 c) is changed through the rotating connection of the connecting shaft (13 b), the inner inclined plates (13 c) on the two sides are simultaneously pressed close to the outer side of the pressure sensor on the placement mechanism (32), at the moment, the contact pieces (13 d) elastically contact the two ends on the outer side of the pressure sensor, the contact pieces (13 d) tightly contact the two ends on the outer side of the pressure sensor, and meanwhile, equal contact force is applied to the two ends on the outer side of the pressure sensor, and the pressure plate (311) is prevented from inclining and sinking in the pressing process of pressure detection of the pressure sensor, so that the pressure plate (311) vertically detects the pressure sensor; the lower end of the pressure sensor is screwed into the lower pressure ring (23 a), the external thread at the lower end of the pressure sensor is matched with the internal thread (23 b) in a threaded manner, so that the pressure sensor is vertically arranged in the placing cavity (322), the pressure sensor receives lower pressure in the pressure detection process, at the moment, the lower slider (23 c) elastically slides down on the spring rod (23 d), the lower pressure ring (23 a) is driven to integrally and stably descend, the threads at the lower end of the pressure sensor and the internal thread (23 b) are prevented from being worn, the bottom of the pressure sensor simultaneously presses the sinking plate (24 a), the buffer descending is performed in the spring sleeve (24 c) through the pressing rod (24 b), and meanwhile, the flexible hose (24 d) elastically contracts, so that the sucker (24 e) is in vacuum fit with the bottom of the pressure sensor, the bottom of the pressure sensor is ensured to be vertically fixed with the sinking plate (24 a), and the pressure sensor is prevented from being inclined sinking after being subjected to pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110848751.9A CN113686485B (en) | 2021-07-27 | 2021-07-27 | Pressure sensor detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110848751.9A CN113686485B (en) | 2021-07-27 | 2021-07-27 | Pressure sensor detection device |
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| Publication Number | Publication Date |
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| CN113686485A CN113686485A (en) | 2021-11-23 |
| CN113686485B true CN113686485B (en) | 2023-06-30 |
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| CN202110848751.9A Active CN113686485B (en) | 2021-07-27 | 2021-07-27 | Pressure sensor detection device |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114733410A (en) * | 2022-05-06 | 2022-07-12 | 广东省农业科学院农业质量标准与监测技术研究所 | Test tube vibrating device for drug detection |
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| CH635196A5 (en) * | 1978-11-14 | 1983-03-15 | Peter Huber | Device having a pressure-measuring instrument and calibration means for calibrating the same, and method for operating the device |
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| JPS5276390U (en) * | 1975-12-04 | 1977-06-07 | ||
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| CN210719524U (en) * | 2019-11-26 | 2020-06-09 | 湖南省水利水电科学研究院 | Calibration equipment of vibrating wire type sensor |
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| CN113686485A (en) | 2021-11-23 |
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