CN109186498B - Comprehensive calibration device - Google Patents
Comprehensive calibration device Download PDFInfo
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- CN109186498B CN109186498B CN201810139979.9A CN201810139979A CN109186498B CN 109186498 B CN109186498 B CN 109186498B CN 201810139979 A CN201810139979 A CN 201810139979A CN 109186498 B CN109186498 B CN 109186498B
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 53
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 10
- 238000012360 testing method Methods 0.000 description 9
- 238000002474 experimental method Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000012937 correction Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 206010039203 Road traffic accident Diseases 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 210000002414 leg Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/22—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring angles or tapers; for testing the alignment of axes
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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
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/0078—Shock-testing of vehicles
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- General Physics & Mathematics (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
Abstract
The invention provides a comprehensive calibration device which is used for detecting and calibrating linear displacement and/or angular displacement of a sensor. The comprehensive calibration device comprises a bottom plate; two first brackets arranged at two ends of the bottom plate in the length direction; the ball screw comprises a screw rod and a screw rod nut in threaded fit with the screw rod, the screw rod is parallel to the bottom plate, and two ends of the screw rod are respectively fixed on the two first brackets; the linear motor is fixedly arranged on the first bracket and used for driving the ball screw to rotate so that the screw nut moves back and forth on the screw; the bottom of the second bracket is fixed on the bottom plate, and the side surface of one first bracket is fixed on the second bracket; the mounting plate is arranged at the top of the second bracket and used for bearing the sensor; and the rotating motor is arranged in the second bracket and drives the sensor to rotate through the mounting plate. The comprehensive calibration device provided by the invention can calibrate the linear displacement and/or the angular displacement of the sensor, and is convenient to install and simple to operate.
Description
Technical Field
The invention relates to the technical field of automobile manufacturing tests, in particular to a comprehensive calibration device for multiple parameters of linear displacement and angular displacement for an automobile crash test.
Background
Since the birth of the automobile, traffic accidents are accompanied, and the lives of countless people are taken away. It is an important and urgent task to study traffic accident patterns and improve automobile design to improve safety. However, according to the practical situation, it is impossible to use a real person in an automobile collision experiment. Therefore, a dummy for collision experiments (CRASH TEST Dummies) was created under such a background condition. The collision experiment dummy is an experiment instrument made of special materials according to the principle of human engineering, and has the characteristic of reusability. The collision experiment dummy is internally provided with four sensors, including an acceleration sensor, a force sensor, a displacement sensor and an angle sensor. And acquiring data of sensors of corresponding types during collision, so as to calculate and analyze the injury index of the real person. Whether the collision data is accurate and reliable depends directly on whether the sensor is correct or not, so that various sensors need to be calibrated and traced at fixed points regularly.
At present, the acceleration sensor and the force sensor for the collision test are integrated with standard calibration equipment in a targeted manner. The displacement sensor and the angle sensor are built outside a plurality of devices such as a traditional gauge block, an angle block, a power supply, a voltmeter and the like, are inconvenient to use, low in compatibility and poor in calibration reproducibility. And is not suitable for the 2D IR-TRACC laser line displacement angle sensor in the novel dummy now, because this type of sensor needs to calibrate angular displacement and linear displacement simultaneously, and the calibration requirement of the sensor of multi-parameter calibration can not be satisfied by the existing calibration equipment.
Disclosure of Invention
In order to solve the above problems in the prior art, the present invention provides a comprehensive calibration device for calibrating linear displacement and/or angular displacement of a sensor, which is convenient to install and simple to operate.
In particular, the present invention proposes an integrated calibration device for detecting and calibrating the linear and/or angular displacement of a sensor, comprising,
A bottom plate;
two first brackets arranged at two ends of the bottom plate in the length direction;
The ball screw comprises a screw rod and a screw rod nut in threaded fit with the screw rod, the screw rod is parallel to the bottom plate, and two ends of the screw rod are respectively fixed on the two first brackets;
The linear motor is fixedly arranged on the first bracket and used for driving the ball screw to rotate so that the screw nut moves back and forth on the screw rod;
the bottom of the second bracket is fixed on the bottom plate, and the side surface of one first bracket is fixed on the second bracket;
the mounting plate is arranged at the top of the second bracket and used for bearing the sensor;
And the rotating motor is arranged in the second bracket and drives the sensor to rotate through the mounting plate.
According to one embodiment of the invention, a plurality of adapters are also included for securing the sensor to the mounting plate.
According to one embodiment of the invention, the adapter is detachably arranged on the base plate.
According to one embodiment of the invention, the mounting plate is connected to the output shaft of the rotating electrical machine by means of rolling bearings and couplings.
According to one embodiment of the invention, the ball screw further comprises a fixing rod provided at both sides of the screw to prevent the screw nut from rotating.
According to one embodiment of the present invention, the motor control device further comprises a controller, wherein the controller is electrically connected with the linear motor and the rotating motor, and is used for controlling a linear movement value of the linear motor and a rotation angle value of the rotating motor.
According to one embodiment of the invention, the electric cabinet further comprises an electric cabinet, the controller is arranged in the electric cabinet, and the bottom plate is arranged on the top of the electric cabinet.
According to one embodiment of the invention, a touch screen is arranged on one side of the electrical cabinet, and the touch screen is electrically connected with the controller.
According to one embodiment of the invention, the included angle formed by the touch screen and the bottom plate is 30 degrees.
According to one embodiment of the invention, the weight support device further comprises a weight support rod, wherein the weight support rod is arranged on the bottom plate, and a fixed pulley is arranged on the weight support rod.
The comprehensive calibration device provided by the invention combines the linear motor and the rotary motor into a whole, can calibrate the linear displacement and/or the angular displacement of the sensor, and is convenient to install and simple to operate.
It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the accompanying drawings:
FIG. 1 is a schematic diagram of the structure of the integrated calibration device of the present invention.
FIG. 2 is a schematic diagram showing the structure of the integrated calibration device according to the present invention in the calibration angle displacement.
FIG. 3 is a schematic diagram showing a second configuration of the integrated calibration device according to the present invention in a calibration angle displacement.
FIG. 4 is a schematic diagram of the structure of the integrated calibration device of the present invention at calibration line displacement.
FIG. 5 is a schematic diagram of the structure of the integrated calibration device of the present invention under calibration of angular and linear displacements.
Detailed Description
Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. Furthermore, although terms used in the present invention are selected from publicly known and commonly used terms, some terms mentioned in the present specification may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein. Furthermore, it is required that the present invention is understood, not simply by the actual terms used but by the meaning of each term lying within.
FIG. 1 is a schematic diagram of the structure of the integrated calibration device of the present invention. As shown, an integrated calibration device 100 is provided for detecting and calibrating linear and/or angular displacement of a sensor. The integrated calibration device 100 includes a base plate 101, a first bracket 102, a ball screw 103, a linear motor 104, a second bracket 105, a mounting plate 106, and a rotary motor 107.
Wherein two first brackets 102 are provided at both ends in the length direction of the bottom plate 101.
The ball screw 103 includes a screw 109 and a screw nut 110 threadedly engaged with the screw 109, and rotation of the screw 109 can move the screw nut 110 back and forth along the screw 109. The screw 109 is parallel to the bottom plate 101, and both ends of the screw 109 are fixed to the two first brackets 102, respectively.
The linear motor 104 is fixedly disposed on a first bracket 102. The linear motor 104 is used to drive the screw 109 of the ball screw 103 to rotate, so that the screw nut 110 moves back and forth on the screw 109.
The second bracket 105 has a shape of a Chinese character 'ji'. The bottom of the second bracket 105 is fixed to the base plate 101, and one side of one first bracket 102 is fixed to the second bracket 105.
A mounting plate 106 is provided on top of the second bracket 105. The mounting plate 106 is used to carry the sensor to be calibrated.
The rotary motor 107 is disposed in the second bracket 105. The rotary motor 107 drives the rotation portion of the sensor to be calibrated to rotate through the mounting plate 106.
Further, the integrated calibration device 100 also includes various adapters 111-114. The adapter members 111 to 114 are used to fix the sensor to be calibrated on the mounting plate 106 for linear displacement calibration, angular displacement calibration or both linear and angular displacement calibration. The calibration operation will be described in detail later in connection with different types of sensors.
Preferably, the adapter members 111-114 are removably disposed on the base plate 101. Different kinds of adapters 111-114 can be conveniently selected for different calibration types of sensors. In addition, after the calibration operation is finished, the adapting pieces 111 to 114 are arranged on the bottom plate 101 in a one-to-one correspondence manner, so that whether the base plate is lost or not can be visually checked, and the base plate is convenient to store.
Preferably, the mounting plate 106 is connected to an output shaft of the rotating electric machine 107 via a rolling bearing and a coupling (not shown).
Preferably, the ball screw 103 further includes fixing rods 115 provided at both sides of the screw 109. The fixing rod 115 is penetrated in the screw nut 110 to prevent the screw nut 110 from being turned over during the movement.
Preferably, the integrated calibration device 100 further comprises a controller (not shown). The controller is electrically connected to the linear motor 104 and the rotary motor 107. The controller is used for controlling the linear movement value of the linear motor 104 and for controlling the rotation angle value of the rotary motor 107.
Preferably, the integrated calibration apparatus 100 further comprises an electrical cabinet 116. The controller is mounted within the electrical cabinet 116, and the base plate 101 is disposed on top of the electrical cabinet 116.
More preferably, a touch screen 117 is provided on one side of the electrical cabinet 116. The touch screen 117 is electrically connected to the controller. The parameters of the linear motor 104 and/or the rotary motor 107 can be set conveniently by means of the touch screen 117. And display the detection data obtained from the sensor on the touch screen 117, making the detection and calibration operations more convenient.
Preferably, the included angle formed by the touch screen 117 and the bottom plate 101 is 30 degrees, which accords with the principle of ergonomics and is convenient to observe and operate.
FIG. 2 is a schematic diagram showing the structure of the integrated calibration device according to the present invention in the calibration angle displacement. As shown, the adapter 111 is removed from the base plate 101 and installed into the mounting plate 106, and the adapter 111 may be secured to the mounting plate 106 by dowel pins. Next, the sensor 118 to be calibrated is loaded onto the adapter 111, and the rotating part of the bottom of the sensor 118 is locked in cooperation with the central hole of the adapter 111. The detecting personnel can set the rotating angle of the rotating motor 107 through the touch screen 117, and control the rotating motor 107 to execute the corresponding rotating angle through the controller, the mounting plate 106 transmits the output torque of the rotating motor 107 to the rotating part at the bottom of the sensor 118 through the rolling bearing and the coupling, and the comprehensive calibration device 100 displays the detected angular displacement data of the sensor 118 on the touch screen 117 in real time through the controller. This mode of operation is only suitable for angular displacement detection and correction, and therefore the linear motor 104 is not operated and the rotary motor 107 is operated in this mode.
FIG. 3 is a schematic diagram showing a second configuration of the integrated calibration device according to the present invention in a calibration angle displacement. As shown in connection with fig. 1, the adapter 112 is used to detect a disc-shaped sensor 119. Conventionally, the disc-shaped sensor 119 includes upper and lower parts that are relatively rotatable. The adapter 112 is installed into the mounting plate 106 and the adapter 112 is locked by bolts 120 to clamp the upper portion of the sensor 119. The rotating portion of the bottom of the sensor 119 is cooperatively locked with the central hole of the adapter 112. The detecting personnel can set the rotating angle of the rotating motor 107 through the touch screen 117, and control the rotating motor 107 to execute the corresponding rotating angle through the controller, the mounting plate 106 transmits the output torque of the rotating motor 107 to the rotating part at the bottom of the sensor 119 through the rolling bearing and the coupling, and the comprehensive calibration device 100 displays the detected angular displacement data of the sensor 119 on the touch screen 117 in real time through the controller. This mode of operation is only suitable for angular displacement detection and correction, in which the linear motor 104 is not operating and the rotary motor 107 is operating, the detection range being 0-360 °.
FIG. 4 is a schematic diagram of the structure of the integrated calibration device of the present invention at calibration line displacement. As shown, the adapter 113 is used to detect a cylindrical or square sensor. The adapter 113 is mounted on the mounting plate 106, and the adapter 113 is provided with a fastening screw 121 and two centrally located fixing plates 122 along the length direction thereof, the length direction of the fastening screw 121 being perpendicular to the length direction of the screw rod 109. The fastening screw 121 is rotated to draw the two fixing pieces 122 toward and away from each other to clamp or unclamp the sensor in a column shape or a square shape. Further, a traction member 123 is provided at the bottom of the screw nut 110, and the traction member 123 is fixedly connected with the telescopic part of the column-shaped or square-shaped sensor. In use of the integrated calibration device 100, a test person first installs the adapter 113 into the mounting plate 106 and rotates the tightening screw 121 to clamp and lock the sensor under test. The traction member 123 is then attached to the telescoping portion of the cylindrical or square sensor. Finally, the linear displacement value of the linear motor 104 is set through the touch screen 117, the linear motor 104 is controlled by the controller to move the lead screw nut 110, the traction piece 123 of the lead screw nut 110 drags the telescopic part of the columnar or square sensor to advance or retreat, and the comprehensive calibration device 100 displays the detected linear displacement data of the sensor on the touch screen 117 in real time through the controller. This mode of operation is only suitable for linear displacement detection and correction, in which the rotary motor 107 is not operating and the linear motor 104 is operating, the detection range being 0-150 mm.
FIG. 5 is a schematic diagram of the structure of the integrated calibration device of the present invention under calibration of angular and linear displacements. As shown, in this case, the linear displacement and the angular displacement of the sensor 124 to be measured can be detected simultaneously. The adapter 114 is secured to the mounting plate 106 and the sensor 124 under test is loaded into the adapter 114 by the locating pins 125. The rotating part at the bottom of the sensor 124 is matched and locked with the central hole of the adapter 114, and the traction piece 123 at the bottom of the screw nut 110 is connected and fixed with the telescopic part of the sensor 124. The detecting personnel can set the rotation angle of the rotating motor 107 through the touch screen 117, and control the rotating motor 107 to execute the corresponding rotation angle through the controller, the mounting plate 106 transmits the output torque of the rotating motor 107 to the rotating part at the bottom of the sensor 124 through the rolling bearing and the coupling, and the comprehensive calibration device 100 displays the detected angular displacement data of the sensor 124 on the touch screen 117 in real time through the controller. Meanwhile, a detector can set the linear displacement value of the linear motor 104 through the touch screen 117, the controller controls the linear motor 104 to move the lead screw nut 110, the traction piece 123 of the lead screw nut 110 drags the telescopic part of the sensor 124 to advance or retreat, and the comprehensive calibration device 100 displays the detected linear displacement data of the sensor 124 on the touch screen 117 in real time through the controller. The operation mode is suitable for detecting and correcting the angular displacement and the linear displacement at the same time, and the linear motor 104 and the rotary motor 107 can work at the same time in the mode, wherein the angular displacement detection range is-75 degrees to +75 degrees, and the linear displacement detection range is 0-150 mm.
Preferably, the integrated calibration device 100 further includes a weight support bar 126. The weight support bar 126 is provided on the bottom plate 101, and a fixed pulley 127 is provided on the weight support bar 126. When the weight support rod 126 is used, a steel wire rope is needed, one end of the steel wire rope is fastened on the telescopic part of the sensor, and the other end of the steel wire rope is hung with a weight with a set weight through the fixed pulley 127. It is readily understood that the weight support bar 126 can adjust the angle and up and down position of the offset inside or outside of the weight used for calibration. The function of the weight support bar 126 is to detect the effect of the sensor on its linear displacement accuracy when subjected to radial forces (weight of the weight).
The integrated calibration device 100 provided by the invention is suitable for various types of sensors, including rib angle sensors, chest displacement sensors, leg angle sensors, knee angle sensors, rib 2D IR-TRACC sensors, stay wire type displacement sensors and pen type displacement sensors. The integrated calibration device 100 can calibrate the straight line and the angular displacement of the sensor to be measured respectively, and can calibrate the angle and the straight line simultaneously. The linear motor and the rotary motor both transmit motion through the balls, so that errors caused by gaps can be reduced. The ball screw stroke range is 0-300 mm, a high-precision incremental rotary encoder is adopted for linear displacement measurement, AB two-phase 4-frequency multiplication is 1600 pulses/rotation, and the resolution reaches +/-0.0025 mm; the angle actuating mechanism is controlled by a high-precision stepping motor, the rotation range is 0-360 degrees, the angle measurement is performed by an embedded single-circle absolute value encoder, 14bits,16384CPR and the angle resolution is +/-0.02 degrees. The motor driver adopts a DSP digital stepping motor driver, is externally arranged for 16-gear constant moment subdivision with equal angle, and the highest subdivision reaches 40000Pu/Rev, thereby ensuring stable operation of the motor, low vibration and noise and high positioning precision. The measured sensor can be calibrated with higher accuracy of linear and angular displacement than conventional calibration methods. The actual numerical values of the measured sensor at the two set values can be displayed and recorded only by setting a certain required position value and angle value on the touch screen and starting operation without manual pulling and human eyes for judgment. Meanwhile, the difference between the actual value and the set (standard) value is calculated, and the error is displayed on the touch screen, so that the touch screen is more visual and accurate. The method is far superior to the traditional detection method when the same detected sensor needs to carry out multi-point and multi-angle detection, and the whole operation is more convenient.
The comprehensive calibration device 100 provided by the invention has the following advantages:
1. multi-parameter, multi-functional, comprehensive integrated calibrating device.
2. The sensor is convenient to install and simple in calibration operation.
3. The applicability is strong, and the displacement sensor is suitable for various automobile crash tests.
4. The calibration accuracy is high, and the magnitude traceability requirement is met.
5. Meets the requirements of various national crash test standards such as EURO-NCAP, CNCAP ISO 6487 SAEJ211 and the like.
It will be apparent to those skilled in the art that various modifications and variations can be made to the above-described exemplary embodiments of the present invention without departing from the spirit and scope of the invention. Therefore, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
Claims (8)
1. An integrated calibration device for detecting and calibrating linear and/or angular displacement of a sensor, comprising,
A bottom plate;
two first brackets arranged at two ends of the bottom plate in the length direction;
The ball screw comprises a screw rod and a screw rod nut in threaded fit with the screw rod, the screw rod is parallel to the bottom plate, and two ends of the screw rod are respectively fixed on the two first brackets;
The linear motor is fixedly arranged on the first bracket and used for driving the ball screw to rotate so that the screw nut moves back and forth on the screw rod;
the bottom of the second bracket is fixed on the bottom plate, and the side surface of one first bracket is fixed on the second bracket;
the mounting plate is arranged at the top of the second bracket and used for bearing the sensor;
A rotating motor arranged in the second bracket, wherein the rotating motor drives the sensor to rotate through the mounting plate;
the controller is electrically connected with the linear motor and the rotating motor and is used for controlling the linear movement value of the linear motor and the rotating angle value of the rotating motor;
the weight supporting rod is arranged on the bottom plate and is provided with a fixed pulley.
2. The integrated calibration device of claim 1, further comprising a plurality of adapters for securing the sensor to the mounting plate.
3. The integrated calibration device of claim 2, wherein the adapter is removably disposed on the base plate.
4. The integrated calibration device of claim 1, wherein the mounting plate is coupled to an output shaft of the rotating electrical machine via a rolling bearing and a coupling.
5. The integrated calibration device of claim 1, wherein the ball screw further comprises a fixed rod disposed on both sides of the screw to prevent rotation of the screw nut.
6. The integrated calibration device of claim 1, further comprising an electrical cabinet, wherein the controller is mounted within the electrical cabinet, and wherein the base plate is disposed on top of the electrical cabinet.
7. The integrated calibration device of claim 6, wherein a touch screen is provided on one side of the electrical cabinet, the touch screen being electrically connected to the controller.
8. The integrated calibration device of claim 7, wherein the touch screen forms an angle of 30 degrees with the base plate.
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| CN201810139979.9A CN109186498B (en) | 2018-02-11 | 2018-02-11 | Comprehensive calibration device |
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| CN201810139979.9A CN109186498B (en) | 2018-02-11 | 2018-02-11 | Comprehensive calibration device |
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| CN109186498B true CN109186498B (en) | 2024-04-30 |
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| CN110412465A (en) * | 2019-08-06 | 2019-11-05 | 哈尔滨工业大学 | Double lead-screw synchronizes drive type straight-line electromechanical testing platform |
| CN114061459B (en) * | 2022-01-18 | 2022-05-10 | 成都飞机工业（集团）有限责任公司 | Non-contact photographic hole measurement calibration device and method |
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| CN106017535A (en) * | 2016-07-21 | 2016-10-12 | 北京美联桥科技发展有限公司 | Device and method for calibrating position sensor of motor driven valve |
| CN206311086U (en) * | 2016-11-15 | 2017-07-07 | 江苏方天电力技术有限公司 | A kind of great-scale displacement sensor calibrating installation |
| CN107036517A (en) * | 2016-12-25 | 2017-08-11 | 杭州集普科技有限公司 | A kind of displacement transducer demarcation loading attachment and scaling method |
| CN207881655U (en) * | 2018-02-11 | 2018-09-18 | 上海机动车检测认证技术研究中心有限公司 | A kind of integrated correction device |
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| CN109186498A (en) | 2019-01-11 |
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