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CN-117554643-B - Portable impact sensor calibration device

CN117554643BCN 117554643 BCN117554643 BCN 117554643BCN-117554643-B

Abstract

The invention discloses a portable impact sensor calibration device which comprises an upper mounting plate, a conical target plate, a small buffer pad, a transmitting tube bottom plate and a winding mechanism which are sequentially arranged from top to bottom, wherein the upper mounting plate is fixedly connected with the upper end of the transmitting tube through a stand column and forms a calibration space, the conical target plate is positioned in the middle of the calibration space, the large end of the conical target plate is upwards, the small end of the conical target plate is contacted with the small buffer pad, the large end of the conical target plate is provided with the outer edge of the target plate, the target plate is in clearance fit with the stand column, the small buffer pad is arranged at the pipe orifice of the transmitting tube, a projectile, a pressure spring and a pull wire are arranged in the transmitting tube, the projectile is in clearance fit with the transmitting tube, the upper end of the pressure spring is propped against the transmitting tube bottom plate, one end of the pull wire is connected with the projectile, the other end of the pull wire is connected with the winding mechanism after penetrating through the pressure spring and the transmitting tube bottom plate, and the winding mechanism is arranged at the bottom of the transmitting tube bottom plate and used for winding and releasing the pull wire. The invention can eliminate the problems of additional errors, inconvenient operation and the like caused by the follow-up of the cable, improves the calibration accuracy and is convenient to carry.

Inventors

  • FANG HOULIN
  • TANG SHIYING
  • GUO QUANSHI
  • TAO SIHAO
  • Liu Binzhe
  • ZHANG LIANGYONG
  • LI AO
  • Bai Wudong

Assignees

  • 西北核技术研究所

Dates

Publication Date
20260505
Application Date
20220804

Claims (10)

  1. 1. The portable impact sensor calibration device is characterized by comprising an upper mounting plate (97), a conical target plate (93), a small buffer pad (92), a transmitting tube (5), a transmitting tube bottom plate (7) and a winding mechanism (8) which are sequentially arranged from top to bottom; The upper mounting plate (97) is fixedly connected with the upper end of the transmitting tube (5) through N upright posts (94), and a calibration space is formed between the upper mounting plate (97) and the end face of the upper end of the transmitting tube (5); the conical target plate (93) is positioned in the middle of the calibration space and is coaxially arranged with the transmitting tube (5), the large end of the conical target plate is upwards, the small end of the conical target plate is contacted with the small buffer pad (92), a target plate outer edge (931) is arranged at the large end of the conical target plate (93), the target plate outer edge (931) is sleeved on the upright post (94) and is in clearance fit with the upright post (94), and the bottom surface of the target plate outer edge (931) is used for installing a sensor to be calibrated; The small buffer cushion (92) is arranged at the upper end of the pipe orifice of the transmitting pipe (5); The device comprises a launching tube (5), a ball (1), a pressure spring (4) and a stay wire (3), wherein the ball (1) is in clearance fit with the launching tube (5), the upper end of the pressure spring (4) is propped against the ball (1) and the lower end of the pressure spring is propped against a launching tube bottom plate (7), one end of the stay wire (3) is connected with the ball (1), and the other end of the stay wire sequentially passes through the pressure spring (4) and the launching tube bottom plate (7) and then is connected with a wire coiling mechanism (8); The wire coiling mechanism (8) is arranged at the bottom of the launching tube bottom plate (7) and is used for coiling or releasing the stay wire (3).
  2. 2. The portable impact sensor calibration device of claim 1, wherein: The device also comprises a large buffer pad (96), an insulating ring (95) and a buffer pad protecting ring (91); The large buffer pad (96) is fixedly arranged at the top of the outer edge (931) of the target plate, sleeved on the upright post (94) and in clearance fit with the upright post (94), the insulating ring (95) is fixedly arranged at the bottom of the outer edge (931) of the target plate, sleeved on the upright post (94) and in clearance fit with the upright post (94), and the bottom surface of the insulating ring (95) is used for installing a sensor to be calibrated; The cushion protection ring (91) is sleeved outside the small cushion (92).
  3. 3. The portable impact sensor calibration device according to claim 2, wherein: The outer wall of the upper end of the transmitting tube (5) is provided with an outer edge of the transmitting tube; the outer diameter of the upper mounting plate (97) is equal to the outer diameter of the outer edge of the transmitting tube; The upright post (94) is arranged between the upper mounting plate (97) and the outer edge of the transmitting tube; the small buffer pad (92) and the buffer pad protecting ring (91) are arranged on the outer edge of the transmitting tube; A supporting rod (6) is arranged between the outer edge of the transmitting tube and the bottom plate (7) of the transmitting tube.
  4. 4. A portable impact sensor calibration device according to any one of claims 1-3, characterized in that: An observation window is arranged on the tube wall of the transmitting tube (5) and used for observing the position of the projectile (1) so as to measure the speed of the projectile (1); The observation window is axially provided with a graduated scale along the transmitting tube (5).
  5. 5. A portable impact sensor calibration device according to any one of claims 1-3, characterized in that: The bottom of the projectile (1) is provided with a first limit groove; A second limit groove is formed in the transmitting tube bottom plate (7); Two ends of the pressure spring (4) are respectively arranged in the first limit groove and the second limit groove; The bottom of the projectile (1) is also provided with a hanging ring (2); one end of the stay wire (3) is connected with the projectile (1) through the hanging ring (2).
  6. 6. A portable impact sensor calibration device according to any one of claims 1-3, characterized in that: The wire winding mechanism (8) comprises a wire winding shell (10), a wire wheel (801), a wire wheel mounting seat, a motor (808), a battery assembly (811) and a control module (812) which are positioned in the wire winding shell (10); The other end of the stay wire (3) is connected with the wire wheel (801); the wire wheel (801) is arranged on the wire wheel mounting seat; An output shaft of the motor (808) is connected with a rotating shaft of the wire wheel (801) and is used for driving the wire wheel (801) to rotate; the battery assembly (811) is connected with the motor (808) and is used for supplying power to the motor (808); The control module (812) is connected with the motor (808) and is used for controlling the start and stop of the motor (808).
  7. 7. The portable impact sensor calibration device of claim 6, wherein: one side of the wire wheel (801) is fixedly connected with a ratchet wheel (802); A pawl (803) is arranged on the winding shell (10); the action end of the pawl (803) is matched with the ratchet wheel (802), and the other end of the pawl extends out of the winding shell (10) for operation.
  8. 8. The portable impact sensor calibration device of claim 6, wherein: the winding mechanism (8) further comprises a first bevel gear (806) and a second bevel gear (807) which are meshed with each other; the first bevel gear (806) is connected with one end of a rotating shaft of the wire wheel (801); the second bevel gear (807) is connected to an output shaft of the motor (808).
  9. 9. The portable impact sensor calibration device of claim 8, wherein: the coiling mechanism (8) further comprises a sliding rail (809), a sliding block arranged on the sliding rail (809) and a toggle lever (810); the slide rail (809) is fixed in the winding shell (10); the motor (808) is fixed on the slide block; The toggle lever (810) is mounted on the winding housing (10), one end of the toggle lever is connected with the sliding block, and is used for toggling the sliding block to drive the motor (808) to move so as to control engagement and disengagement of the first bevel gear (806) and the second bevel gear (807), and the other end of the toggle lever extends out of the winding housing (10) for operation.
  10. 10. The portable impact sensor calibration device of claim 8, wherein: the winding mechanism (8) further comprises a crank (815); one end of the crank (815) is positioned outside the winding shell (10), and the other end of the crank extends into the winding shell (10) and is connected with the other end of the rotating shaft of the wire wheel (801).

Description

Portable impact sensor calibration device Technical Field The invention relates to the technical field of sensor calibration, in particular to a portable impact sensor calibration device. Background Impact sensors, such as acceleration sensors, speed sensors, etc., have important applications in scientific research experiments, engineering construction, etc., and are basic devices for acquiring impact sources and target impact parameters and response parameters thereof. Because many impact sensors have time-varying characteristics, sensitivity parameters thereof can change with time, and in order to improve accuracy of acquired data, sensitivity calibration is generally required to be performed on the impact sensor. The traditional method for calibrating the impact sensor is that a falling body table (falling weight) is calibrated, some impact sensors are required to be installed on a hammer face, a standard sensor and a tested sensor move together with the falling weight to calibrate, and the other method is that a shot impact calibration is carried out, and the standard sensor and the tested sensor are calibrated in a back-to-back installation mode. The calibration method and the calibration device have the following problems: First, the movement of the sensor with the moving part causes the follow-up of the cable, which leads to the introduction of excessive errors and also causes operational inconveniences. Secondly, the sensor mounting plane is smaller, the number of the sensors can be calibrated simultaneously, and the calibration efficiency is low. Thirdly, the calibration instrument of the existing impact sensor is large and heavy, inconvenient to carry, high in environmental requirement, and unsuitable for carrying and using in a outfield test, and power supply is also needed. Disclosure of Invention The invention aims to provide a portable impact sensor calibration device, which solves the problems of large calibration error and low calibration efficiency in the prior art. In order to achieve the above purpose, the invention adopts the following technical scheme: the portable impact sensor calibration device is characterized by comprising an upper mounting plate, a conical target plate, a small buffer pad, a transmitting tube bottom plate and a wire coiling mechanism which are sequentially arranged from top to bottom; The upper mounting plate is fixedly connected with the upper end of the transmitting tube through N upright posts, and a calibration space is formed between the upper mounting plate and the end face of the upper end of the transmitting tube; The conical target plate is positioned in the middle of the calibration space and is coaxially arranged with the transmitting tube, the large end of the conical target plate is upward, and the small end of the conical target plate is contacted with the small buffer cushion; the conical target plate is characterized in that a target plate outer edge is arranged at the large end of the conical target plate, and is sleeved on the upright post and in clearance fit with the upright post, and the bottom surface of the target plate outer edge is used for installing a sensor to be calibrated; The small buffer cushion is arranged at the upper end of the pipe orifice of the transmitting pipe; The launching tube is internally provided with a projectile, a pressure spring and a pull wire, wherein the projectile is in clearance fit with the launching tube, the upper end of the pressure spring is propped against the projectile, the lower end of the pressure spring is propped against the launching tube bottom plate, one end of the pull wire is connected with the projectile, and the other end of the pull wire sequentially penetrates through the pressure spring and the launching tube bottom plate and then is connected with the winding mechanism; the winding mechanism is arranged at the bottom of the bottom plate of the launching tube and is used for winding or releasing the stay wire. In one possible implementation, the device further comprises a large buffer pad, an insulating ring and a buffer pad guard ring; The large buffer cushion is fixedly arranged at the top of the outer edge of the target plate, sleeved on the upright post and in clearance fit with the upright post; The insulating ring is fixedly arranged at the bottom of the outer edge of the target plate, sleeved on the upright post and in clearance fit with the upright post, and the bottom surface of the insulating ring is used for installing a sensor to be calibrated; the cushion pad guard ring is sleeved outside the small cushion pad. In one possible implementation manner, the outer wall of the upper end of the transmitting tube is provided with an outer edge of the transmitting tube; the outer diameter of the upper mounting plate is equal to the outer diameter of the outer edge of the transmitting tube; the upright post is arranged between the upper mounting plate and the outer edge of the transmit