CN107796581B - Vibrating table for sensor calibration - Google Patents
Vibrating table for sensor calibration Download PDFInfo
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- CN107796581B CN107796581B CN201711015094.XA CN201711015094A CN107796581B CN 107796581 B CN107796581 B CN 107796581B CN 201711015094 A CN201711015094 A CN 201711015094A CN 107796581 B CN107796581 B CN 107796581B
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- crankshaft
- connecting rod
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- lubricating oil
- piston
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D18/00—Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
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- General Physics & Mathematics (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The invention discloses a device which comprises a servo motor, a synchronous belt, a crankshaft, a connecting rod, a piston and a guide rod, wherein the servo motor is arranged on the synchronous belt; the servo motor drives the crankshaft to rotate through the synchronous belt; one end of the connecting rod is matched with the crankshaft, and the other end of the connecting rod is connected with the piston; the tail part of the piston is connected with a guide rod; the pistons are symmetrically distributed on two sides of the rotating shaft of the crankshaft; the upper end of the connecting rod is provided with a vent hole; a lubricating oil cavity is formed in the connecting rod; the vent hole is communicated with the lubricating oil cavity; the lubricating oil cavity is communicated with the first shaft hole through the first liquid outlet channel; the lubricating oil cavity is communicated with the second shaft hole through a second liquid outlet channel; the vibration table can effectively overcome the inertia of the mechanism and realize stable operation with high frequency and low distortion.
Description
Technical Field
The invention relates to the field of experimental equipment, in particular to a vibrating table for sensor calibration.
Background
The vibration phenomenon is closely related to the life aspect of people, and the vibration principle is widely applied to the industrial fields of automatic feeding, screening, polishing, grinding, pile sinking and the like. Meanwhile, vibration also brings great threat to production safety, for example, more than 50% of faults of an aeroengine are directly related to vibration, so that vibration research has great significance to the development of equipment manufacturing, national defense and other engineering fields in China. Vibration tables for vibration research can be classified into the following four types according to the use: fatigue resistance test, environmental vibration test, dynamic characteristic test and sensor calibration device can be divided into the following three types according to principle characteristics: mechanical vibration table, electrohydraulic vibration table and electromagnetic vibration table. The mechanical vibrating table has low cost, simple structure and accurate output waveform among the three, and is still used in a large amount. However, the main current mechanical vibrating table has obvious defects, namely the weight is large, the inertia generated by the structure is large during high-frequency operation, and the distortion of the output waveform is obvious. There is therefore a need for a mechanical vibrating table structure for sensor calibration that can effectively overcome inertia, achieve high frequency operation and maintain low distortion.
Disclosure of Invention
The invention aims to: in order to overcome the defects in the prior art, the invention provides the vibrating table for calibrating the sensor, which effectively overcomes the inertia of a mechanism and realizes stable operation with high frequency and low distortion.
The technical scheme is as follows: in order to achieve the above purpose, the vibrating table for sensor calibration of the present invention comprises a servo motor, a synchronous belt, a crankshaft, a connecting rod, a piston and a guide rod; the servo motor drives the crankshaft to rotate through the synchronous belt; one end of the connecting rod is matched with the crankshaft, and the other end of the connecting rod is connected with the piston; the tail part of the piston is connected with a guide rod.
Furthermore, the two ends of the connecting rod are directly matched with the crankshaft and the piston through the shaft holes, so that the problem that the bearing structure is easy to damage under high-speed running of equipment can be avoided; the pistons are symmetrically distributed on two sides of the rotating shaft of the crankshaft, so that when the vibrating table operates, the movement directions of the two pistons are opposite, the inertia of the mechanism can be effectively counteracted, and the output of the vibrating table is more stable.
Further, the device also comprises a base, a motor support, a synchronous pulley, a counterweight ring, a cylinder crankshaft bearing, a vibrating end cover, a piston pin, a guide rod connecting piece, a sensor and a sensor support; the servo motor is arranged on the motor support; the synchronous belt wheels comprise a first synchronous belt wheel and a second synchronous belt wheel; the first synchronous belt pulley is arranged on the synchronous belt pulley support, and is matched with the servo motor; the second synchronous pulley is connected with one side of the crankshaft, which is close to the synchronous belt; the two ends of the crankshaft are matched with the crankshaft bearings; the crankshaft bearing is arranged on the vibration cylinder body; the vibration end cover is positioned at the upper end of the cylinder body; one end of the connecting rod, which is connected with the piston, is matched with the piston pin; the piston pin is positioned at the front end of the piston; the counterweight ring is arranged at the tail part of the piston; the tail part of the piston is connected with the guide rod through the guide rod connecting piece; the sensor is arranged on the sensor support, and the guide rod passes through the sensor to do reciprocating motion.
Further, the connecting rod comprises a first shaft hole and a second shaft hole; the first shaft hole is matched with the crankshaft, and the second shaft hole is matched with the piston pin; the connecting rod is provided with a vent hole; a lubricating oil cavity is formed in the connecting rod; the vent hole is communicated with the lubricating oil cavity; the lubricating oil cavity is communicated with the first shaft hole through the first liquid outlet channel; the lubricating oil cavity is communicated with the second shaft hole through a second liquid outlet channel; when the crankshaft drives the connecting rod to move, lubricating oil in the lubricating oil cavity can supplement lubricating oil in the shaft hole through the liquid outlet channels at the two ends, so that the crankshaft sliding block structure is kept stable in operation.
Further, the cross section area of the lubricating oil cavity is larger than that of the first liquid outlet channel and the second liquid outlet channel, so that most of lubricating oil in the connecting rod is concentrated in the lubricating oil cavity, the inertial force applied to the device in operation is larger, and the lubricating oil is easier to flow into the shaft hole.
Further, the lubricating oil cavity and the second liquid outlet channel are positioned on the symmetrical axis of the connecting rod; this ensures that when the connecting rod is in two motion positions which are vertically symmetrical about the horizontal plane, the inertial forces experienced by the lubricating oil chamber and the second liquid outlet channel are equal, thereby ensuring that the lubricating oil is evenly discharged.
Further, the cross-sectional area of the outlet of the second liquid outlet channel is gradually reduced; the outlet of the second liquid outlet channel is positioned at one side of the second shaft hole close to the inner side; the contracted outlet structure can properly reduce the outflow speed of the lubricating oil so as to ensure uniform and stable replenishment of the lubricating oil.
Further, the cross-sectional area of the first liquid outlet channel from the inlet to the outlet is gradually reduced; the outlet of the first liquid outlet channel is positioned obliquely above one side of the first shaft hole, which is close to the outer side; the smaller cross-sectional area ensures that the lubricating oil in the first liquid outlet channel flows out more easily under the action of capillary phenomenon; the outlet is arranged on the outer side, so that the first shaft hole and the second shaft hole can be alternately supplemented with lubricating liquid when the connecting rod runs, the supplementing quantity of lubricating oil is effectively controlled, and the stable running of the whole mechanism is facilitated; if the outlet is arranged at the furthest point in the horizontal direction near the outer side, the flowing distance of the lubricating oil in the first liquid outlet channel is too far and the flowing direction is changed too much, which is unfavorable for the outflow of the lubricating liquid, and if the outlet is arranged at the lower part near the outer side, the lubricating oil is greatly influenced by gravity and the continuous stability of the liquid outlet amount cannot be ensured.
Further, the vent hole is positioned at the top of the middle section of the connecting rod; the vent holes are formed, so that the air pressure in the lubricating oil cavity can be balanced with the outside at any time, and lubricating oil can flow out of the two liquid outlet channels; the movement amplitude of the middle section of the connecting rod is relatively minimum, so that the phenomenon that lubricating oil flows out of the vent hole is not easy to occur; the lubricating oil can be prevented from flowing out of the vent hole under the action of gravity when the lubricating oil is arranged at the top end.
The beneficial effects are that: according to the vibrating table for sensor calibration, part of large inertia of a mechanism is effectively counteracted through the pistons symmetrically arranged relative to the central rotating shaft of the crankshaft; the shaft hole of the connecting rod adopts a bearingless structure, so that the problem that a connecting rod bearing is easy to damage during high-speed operation is avoided, meanwhile, the connecting rod is internally provided with a lubricating oil cavity, lubricating oil is conveyed into the rotating shaft through a liquid outlet channel by inertia during mechanism operation, and the joint of the connecting rod, the rotating shaft and the piston is prevented from being damaged due to high-speed frequent friction.
Drawings
FIG. 1 is a schematic diagram of a sensor calibration vibratory table;
FIG. 2 is a schematic diagram of a part of the structure of a crankshaft slide block;
fig. 3 is a cross-sectional view of the connecting rod.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
A vibrating table for sensor calibration shown in the accompanying drawings comprises a servo motor 3, a synchronous belt 4, a crankshaft 17, a connecting rod 19, a piston 16 and a guide rod 13; the servo motor 3 drives a crankshaft 17 to rotate through a synchronous belt 4; one end of the connecting rod 19 is matched with the crankshaft 17, and the other end of the connecting rod 19 is connected with the piston 16; the tail of the piston 16 is connected with the guide rod 13.
The two ends of the connecting rod 19 are directly matched with the crankshaft 17 and the piston 16 through shaft holes, so that the problem that a bearing structure is easy to damage under high-speed running of equipment can be avoided; the pistons 16 are symmetrically distributed on two sides of the rotating shaft of the crankshaft 17, so that when the vibrating table runs, the pistons 16 on two sides of the crankshaft 17 move in opposite directions, the inertia of the mechanism can be effectively counteracted, and the output of the vibrating table is more stable.
The device also comprises a base 1, a motor support 2, a synchronous pulley support 5, a synchronous pulley 6, a counterweight ring 7, a cylinder body 8, a crankshaft bearing 9, a vibration end cover 10, a piston pin 11, a guide rod connecting piece 12, a sensor 14 and a sensor support 15; the servo motor 3 is arranged on the motor support 2; the synchronous pulley 6 includes a first synchronous pulley 61 and a second synchronous pulley 62; the first synchronous pulley 61 is arranged on the synchronous pulley support 5, and the first synchronous pulley 61 is matched with the servo motor 3; the second synchronous pulley 62 is connected with one side of the crankshaft 17 close to the synchronous belt 4; the two ends of the crankshaft 17 are matched with the crankshaft bearings 9; the crankshaft bearing 9 is arranged on the vibration cylinder body 8; the vibration end cover 10 is positioned at the upper end of the cylinder body 8; one end of the connecting rod 19 connected with the piston 16 is matched with the piston pin 11; the piston pin 11 is positioned at the front end of the piston 16; the counterweight ring 7 is arranged at the tail part of the piston 16; the tail part of the piston 16 is connected with the guide rod 13 through the guide rod connecting piece 12; the sensor 14 is mounted on a sensor support 15, and the guide rod 13 reciprocates through the sensor 14.
The connecting rod 19 includes a first shaft bore 194 and a second shaft bore 196; the first shaft hole 194 is matched with the crankshaft 17, and the second shaft hole 196 is matched with the piston pin 11; the connecting rod 19 is provided with a vent 191; a lubricating oil cavity 192 is formed in the connecting rod 19; the vent hole 191 is communicated with the lubricating oil cavity 192; the lubricating oil cavity 192 is communicated with the first shaft hole 194 through a first liquid outlet passage 193; the lubricating oil cavity 192 is communicated with the second shaft hole 196 through the second liquid outlet passage 195; when the crankshaft 17 drives the connecting rod 19 to move, the lubricating oil in the lubricating oil cavity 192 can supplement the lubricating oil in the two shaft holes through the liquid outlet channels at the two ends, so that the vibration table can continuously and stably run.
The cross-sectional area of the lubricating oil cavity 192 is larger than that of the first liquid outlet channel 193 and the second liquid outlet channel 195, so that most of lubricating oil in the connecting rod 19 is concentrated in the lubricating oil cavity 192, and inertial force applied to the device in operation is larger, so that the lubricating oil is easier to flow into the shaft hole.
The lubricating oil cavity 192 and the second liquid outlet passage 195 are positioned on the symmetry axis of the connecting rod 19; this ensures that when the connecting rod 19 is in two moving positions which are vertically symmetrical about the horizontal plane, the inertial forces to which the oil chamber 192 and the second liquid outlet passage 195 are subjected are equal, thereby ensuring that the oil outlet is uniform.
The cross-sectional area of the outlet of the second liquid outlet channel 195 gradually decreases; the outlet of the second liquid outlet channel 195 is positioned at the inner side of the second shaft hole 196; the contracted outlet structure can properly reduce the outflow speed of the lubricating oil so as to ensure uniform and stable replenishment of the lubricating oil.
The first liquid outlet passage 193 is gradually reduced in cross-sectional area from the inlet to the outlet; the outlet of the first liquid outlet channel 193 is positioned obliquely above the outer side of the first shaft hole 194; the smaller cross-sectional area makes the lubricant in the first liquid outlet passage 193 more likely to flow out by capillary phenomenon; the outlet is arranged on the outer side, so that the lubrication liquid of the first shaft hole 193 and the second shaft hole 195 can be alternately supplied when the connecting rod 19 runs, the supply quantity of the lubrication oil is effectively controlled, and the stable running of the whole mechanism is facilitated; if the outlet is provided at the furthest point in the outer horizontal direction, the lubricant flowing distance in the first liquid outlet passage 193 is too far and the flowing direction is changed too much, which is unfavorable for the outflow of the lubricant, and if the outlet is provided at the lower outer side, the lubricant is greatly affected by gravity and the continuous stability of the liquid outlet amount cannot be ensured.
The vent 191 is positioned at the top of the middle section of the connecting rod 19; the vent holes 191 are arranged to keep the air pressure in the lubricating oil cavity 192 balanced with the outside at any time, so that lubricating oil can flow out from the two liquid outlet channels; the movement amplitude of the middle section of the connecting rod is relatively minimum, so that the phenomenon that lubricating oil flows out of the vent hole is not easy to occur; the lubricating oil can be prevented from flowing out of the vent hole 191 under the action of gravity by being arranged at the top end.
The crankshaft 17 is known to be in clearance fit with the first shaft hole 194 of the connecting rod 19, and the piston pin 11 is also known to be in clearance fit with the second shaft hole 196 of the connecting rod 19, so that the lubricant smoothly flows out by capillary action generated by the clearance. The following specific examples are thus given:
embodiment one: when the outlet of the first liquid outlet passage 193 is located inside the first shaft hole 194, the outlet of the second liquid outlet passage 195 is located inside the second shaft hole 196
At this time, if the connecting rod 19 moves in a direction away from the crankshaft 17, the crankshaft 17 is closely attached to the inner side of the first shaft hole 194, the piston pin 11 is closely attached to the inner side of the second shaft hole 196, the outlets of the first liquid outlet channel 193 and the second liquid outlet channel 195 are both blocked, and no lubricating oil flows out; if the connecting rod 19 moves in the direction approaching the crankshaft 17, the crankshaft 17 is closely attached to the outer side of the first shaft hole 194, the piston pin 11 is closely attached to the outer side of the second shaft hole 196, and the outlets of the first liquid outlet channel 193 and the second liquid outlet channel 195 are exposed, but the whole lubricating oil is subjected to inertia force in the direction toward the second liquid outlet channel 195, so that only the second shaft hole 196 is filled with lubricating oil; therefore, during the operation of the vibrating table, no lubricant is supplied to the first shaft hole 194 all the time, and this solution is not feasible.
Implementation case two: when the outlet of the first liquid outlet passage 193 is located outside the first shaft hole 194, the outlet of the second liquid outlet passage 195 is located outside the second shaft hole 196
At this time, if the connecting rod 19 moves in a direction away from the crankshaft 17, the crankshaft 17 is closely attached to the inner side of the first shaft hole 194, the piston pin 11 is closely attached to the inner side of the second shaft hole 196, and the outlets of the first liquid outlet passage 193 and the second liquid outlet passage 195 are exposed, but the whole lubricating oil is subjected to the inertial force in the direction of the first liquid outlet passage 193, so that the lubricating oil is replenished in the first shaft hole 194, but the lubricating oil is not replenished in the second shaft hole 196; if the connecting rod 19 moves in the direction approaching the crankshaft 17, the crankshaft 17 clings to the outer side of the first shaft hole 194, the piston pin 11 clings to the outer side of the second shaft hole 196, the outlets of the first liquid outlet channel 193 and the second liquid outlet channel 195 are blocked, and the first shaft hole 194 and the second shaft hole 196 are not supplied with lubricating oil; therefore, during operation of the vibrating table, the first shaft hole 194 is filled with lubricating oil, while the second shaft hole 196 is not filled with lubricating oil all the time.
Embodiment III: when the outlet of the first liquid outlet passage 193 is located inside the first shaft hole 194, the outlet of the second liquid outlet passage 195 is located outside the second shaft hole 196
At this time, if the connecting rod 19 moves in a direction away from the crankshaft 17, the crankshaft 17 is closely attached to the inner side of the first shaft hole 194, so that the outlet of the first liquid outlet channel 193 is blocked; meanwhile, the piston pin 11 is tightly attached to the inner side of the second shaft hole 196, so that the outlet of the second liquid outlet channel 195 is exposed, but at the moment, the lubricating oil is subjected to inertial force towards the outlet direction of the first liquid outlet channel 193, so that the lubricating oil does not flow out of the outlet of the second liquid outlet channel 195; if the connecting rod 19 moves towards the direction approaching the crankshaft 17, the crankshaft 17 clings to the outer side of the first shaft hole 194 so as to expose the outlet of the first liquid outlet channel 193, and meanwhile, the piston pin 11 clings to the outer side of the second shaft hole 196 so as to block the outlet of the second liquid outlet channel 195, at this time, the lubricating oil receives inertial force towards the direction of the second liquid outlet channel 195, so that no lubricating oil flows out from the outlet of the first liquid outlet channel 193; therefore, during operation of the vibrating table, no lubricant is supplied to the first shaft hole 194 and the second shaft hole 196 all the time, and this solution is not feasible.
From the above three embodiments, it is understood that the stable replenishment of the lubricating oil in the first shaft hole 194 and the second shaft hole 196 during the operation of the mechanism can be achieved only by adopting the scheme of the present invention. The vibration table for sensor calibration eliminates the traditional bearing structure on the matching of the connecting rod 19, the crankshaft 17 and the piston pin 11, and avoids the problem that the bearing is easy to damage in high-speed operation; meanwhile, through the lubricating oil cavity 192, the first liquid outlet channel 193 and the second liquid outlet channel 195 which are designed in the connecting rod 19, a dynamic supply scheme for alternately supplying lubricating oil to the first shaft hole 194 and the second shaft hole 196 is realized, continuous stability of operation of the equipment mechanism and high precision of output are ensured, and the calibration level of the sensor is remarkably improved.
The foregoing is only a preferred embodiment of the invention, it being noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the invention.
Claims (3)
1. A vibrating table for sensor calibration, characterized by: comprises a servo motor (3), a synchronous belt (4), a crankshaft (17), a connecting rod (19), a piston (16) and a guide rod (13); the servo motor (3) drives the crankshaft (17) to rotate through the synchronous belt (4); one end of the connecting rod (19) is matched with the crankshaft (17), and the other end of the connecting rod (19) is connected with the piston (16); the tail part of the piston (16) is connected with the guide rod (13);
the connecting rod (19) comprises a first shaft hole (194) and a second shaft hole (196); the first shaft hole (194) is matched with the crankshaft (17), and the second shaft hole (196) is matched with the piston pin (11); the connecting rod (19) is provided with a vent hole (191); a lubricating oil cavity (192) is formed in the connecting rod (19); the vent hole (191) is communicated with the lubricating oil cavity (192); the lubricating oil cavity (192) is communicated with the first shaft hole (194) through a first liquid outlet channel (193); the lubricating oil cavity (192) is communicated with the second shaft hole (196) through a second liquid outlet channel (195);
the cross-sectional area of the lubricating oil cavity (192) is larger than the cross-sectional areas of the first liquid outlet channel (193) and the second liquid outlet channel (195);
the lubricating oil cavity (192) and the second liquid outlet channel (195) are positioned on the symmetry axis of the connecting rod (19);
the cross-sectional area of the outlet of the second liquid outlet channel (195) gradually decreases; the outlet of the second liquid outlet channel (195) is positioned at the inner side of the second shaft hole (196);
the first liquid outlet passage (193) gradually decreases in cross-sectional area from the inlet to the outlet; the outlet of the first liquid outlet channel (193) is positioned obliquely above one side of the first shaft hole (194) which is close to the outer side;
the vent hole (191) is positioned at the top of the middle section of the connecting rod (19).
2. A vibrating table for sensor calibration according to claim 1, wherein: two ends of the connecting rod (19) are directly matched with the crankshaft (17) and the piston (16) through shaft holes; the pistons (16) are symmetrically distributed on two sides of the rotating shaft of the crankshaft (17).
3. A vibrating table for sensor calibration according to claim 1, wherein: the device also comprises a base (1), a motor support (2), a synchronous pulley support (5), a synchronous pulley (6), a counterweight ring (7), a cylinder body (8), a crankshaft bearing (9), a vibration end cover (10), a piston pin (11), a guide rod connecting piece (12), a sensor (14) and a sensor support (15); the servo motor (3) is arranged on the motor support (2); the synchronous pulley (6) comprises a first synchronous pulley (61) and a second synchronous pulley (62); the first synchronous pulley (61) is arranged on the synchronous pulley support (5), and the first synchronous pulley (61) is matched with the servo motor (3); the second synchronous pulley (62) is connected with one side of the crankshaft (17) close to the synchronous belt (4); two ends of the crankshaft (17) are matched with the crankshaft bearings (9); the crankshaft bearing (9) is arranged on the vibration cylinder body (8); the vibration end cover (10) is positioned at the upper end of the cylinder body (8); one end of the connecting rod (19) connected with the piston (16) is matched with the piston pin (11); the piston pin (11) is positioned at the front end of the piston (16); the counterweight ring (7) is arranged at the tail part of the piston (16); the tail part of the piston (16) is connected with the guide rod (13) through the guide rod connecting piece (12); the sensor (14) is arranged on the sensor support (15), and the guide rod (13) reciprocates through the sensor (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711015094.XA CN107796581B (en) | 2017-10-26 | 2017-10-26 | Vibrating table for sensor calibration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711015094.XA CN107796581B (en) | 2017-10-26 | 2017-10-26 | Vibrating table for sensor calibration |
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| CN107796581A CN107796581A (en) | 2018-03-13 |
| CN107796581B true CN107796581B (en) | 2023-10-17 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5343752A (en) * | 1992-04-20 | 1994-09-06 | Team Corporation | High frequency vibration test fixture with hydraulic servo valve and piston actuator |
| CN105136464A (en) * | 2015-09-08 | 2015-12-09 | 西华大学 | Engine crankshaft connecting rod simulation mechanism |
| CN110972556B (en) * | 2014-12-24 | 2016-11-30 | 中国兵器工业集团第二0二研究所 | Frequency response frequency band calibrating device for displacement sensor |
| CN106289696A (en) * | 2016-10-10 | 2017-01-04 | 镇江高等职业技术学校 | Three translational vibration platforms based on parallel institution |
| CN207351642U (en) * | 2017-10-26 | 2018-05-11 | 西安工业大学 | A kind of high accuracy output shake table |
-
2017
- 2017-10-26 CN CN201711015094.XA patent/CN107796581B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5343752A (en) * | 1992-04-20 | 1994-09-06 | Team Corporation | High frequency vibration test fixture with hydraulic servo valve and piston actuator |
| CN110972556B (en) * | 2014-12-24 | 2016-11-30 | 中国兵器工业集团第二0二研究所 | Frequency response frequency band calibrating device for displacement sensor |
| CN105136464A (en) * | 2015-09-08 | 2015-12-09 | 西华大学 | Engine crankshaft connecting rod simulation mechanism |
| CN106289696A (en) * | 2016-10-10 | 2017-01-04 | 镇江高等职业技术学校 | Three translational vibration platforms based on parallel institution |
| CN207351642U (en) * | 2017-10-26 | 2018-05-11 | 西安工业大学 | A kind of high accuracy output shake table |
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| CN107796581A (en) | 2018-03-13 |
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