CN111735636A - Dummy positioning device and dummy positioning method for automobile crash test - Google Patents
Dummy positioning device and dummy positioning method for automobile crash test Download PDFInfo
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- CN111735636A CN111735636A CN201910230295.4A CN201910230295A CN111735636A CN 111735636 A CN111735636 A CN 111735636A CN 201910230295 A CN201910230295 A CN 201910230295A CN 111735636 A CN111735636 A CN 111735636A
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- dummy
- longitudinal guide
- slider
- measuring device
- guide rails
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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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- 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
- G01B11/002—Measuring arrangements characterised by the use of optical techniques for measuring two or more coordinates
Abstract
The invention provides a dummy positioning device and a dummy positioning method for an automobile crash test, which comprise a fixed bracket, a control device, a transverse guide rail, two longitudinal guide rails which are parallel to each other and two laser ranging devices, wherein the transverse guide rail is fixedly arranged on the fixed bracket; the transverse guide rails are respectively provided with a first displacement measuring device, each longitudinal guide rail is respectively provided with a second displacement measuring device, and the laser ranging device, the first displacement measuring device and the second displacement measuring device are respectively electrically connected with the control device. The dummy positioning device can simultaneously and visually read the coordinates of two positions in a finished automobile coordinate system and the relative coordinates between the two positions on a dummy body in a collision test, so that the dummy positioning efficiency is improved, the accuracy of a measurement result is ensured, and the whole device is simple in structure and convenient to operate.
Description
Technical Field
The invention relates to the technical field of automobile product testing, in particular to a dummy positioning device and a dummy positioning method for an automobile crash test.
Background
The automobile crash test is to evaluate the safety performance of an automobile by collecting data of a dummy in the test process, and whether the position of the dummy in the crash test is accurate directly influences the accuracy of the data of the dummy sensor collected in the test process, so that dummy positioning in the crash test is a very critical step. In the automobile research and development process, strict requirements are placed on the positions of the head, the arms, the hands, the upper trunk, the H point, the pelvic angle, the feet and the like of the simulated real human dummy, and the position relation among all the positions has certain correlation, so that the positioning of the tested dummy is important and complex work. At present, methods adopted by various large detection mechanisms and host factories for positioning a dummy in a collision test in China are similar, and mainly comprise a measuring method of a knuckle arm measuring instrument, a measuring tape and laser combined measuring method and other measuring methods of devices. The articulated arm measuring instrument has high precision, but is expensive, and only can carry out single-point measurement and display; the principle of the measuring method by combining the tape measure and the laser is simple, but only single-point measurement can be carried out, and the precision and the efficiency cannot be ensured. In the process of dummy positioning in an automobile crash test, positioning of two parts is always required to be considered simultaneously, so that the devices have certain defects.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a dummy positioning device and a dummy positioning method for an automobile crash test, wherein the dummy positioning device can simultaneously and visually read the coordinates of any two positions on a crash test dummy in a finished automobile coordinate system and the relative coordinates between the two positions, so that the dummy positioning efficiency is improved, the accuracy of a measurement result is ensured, and the whole device is simple in structure and convenient to operate.
Based on the above, the invention provides a dummy positioning device for an automobile crash test, which comprises a fixed bracket, a control device, a transverse guide rail, two longitudinal guide rails parallel to each other and two laser ranging devices, wherein the fixed bracket is fixedly connected with the control device;
the transverse guide rails are respectively and fixedly arranged on the fixed brackets;
the two parallel longitudinal guide rails are respectively connected to the transverse guide rails in a vertical and slidable manner;
the two parallel longitudinal guide rails are respectively provided with the slidable laser ranging device;
the two parallel longitudinal guide rails are respectively provided with a second displacement measuring device for detecting the sliding displacement of the laser ranging device on the longitudinal guide rails;
the laser ranging device, the first displacement measuring device and the second displacement measuring device are respectively electrically or wirelessly connected with the control device.
Optionally, two slidable first sliding blocks are arranged on the transverse guide rail, and the two parallel longitudinal guide rails are slidably connected with the transverse guide rail through the first sliding blocks respectively;
and a second sliding block capable of sliding is arranged on each longitudinal guide rail, and the laser ranging device is connected with the longitudinal guide rails in a sliding manner through the second sliding blocks.
Optionally, the dummy positioning device for the automobile crash test further includes two positioning and balancing devices corresponding to the two parallel longitudinal guide rails, each positioning and balancing device includes a connecting rope and a balancer, the balancer is fixedly mounted at the upper end of the longitudinal guide rail, the connecting rope is connected between the balancer and the second slider, and the second slider is provided with a first locking mechanism for locking the second slider.
Optionally, the first displacement measuring device includes a first blade and two first displacement sensors respectively fixedly mounted on the first sliding block, and the first blade is laid on the transverse guide rail along the length direction;
the second displacement measuring device comprises a second ruler strip and a second displacement sensor fixedly mounted on the second sliding block, and the second ruler strip is laid on the longitudinal guide rail along the length direction;
the first displacement sensor and the second displacement sensor are respectively electrically or wirelessly connected with the control device.
Optionally, the first ruler strip and the second ruler strip are both magnetic stripes, and the first displacement sensor and the second displacement sensor are both magnetic grid sensors.
Optionally, the laser range finder includes laser emitter and the laser range finder that arrange side by side, laser emitter with the laser range finder fixed mounting be in on the same side of second slider, just laser emitter with the laser range finder respectively with controlling means electricity is connected or wireless connection.
Optionally, the first sliding block includes a first supporting plate and a first sliding member, one side surface of the first supporting plate is fixedly connected to the longitudinal guide rail, the first sliding member is fixedly connected to the other side surface of the first supporting plate, and the first sliding member is slidably connected to the transverse guide rail;
the second slider includes second backup pad and second slider, laser emitter with laser range finder fixed mounting respectively on a side of second backup pad, second slider fixed connection in on another side of second backup pad, just the second slider with longitudinal rail slidable connects.
Optionally, the first sliding part is provided with two first bosses, the transverse guide rail is provided with two first sliding grooves corresponding to the first bosses one by one along the length direction, and the first bosses are arranged in the first sliding grooves;
the second sliding part is provided with two second bosses, the longitudinal guide rail is provided with two second sliding grooves which correspond to the second bosses one to one along the length direction, and the second bosses are arranged in the second sliding grooves.
Optionally, the control device comprises an electric control box body, a PLC and a touch display screen, the PLC is arranged in the electric control box body, the touch display screen is arranged on the side face of the electric control box body, the electric control box body is fixedly mounted on the fixed support, the touch display screen is electrically connected with the PLC, and the laser ranging device, the first displacement measuring device and the second displacement measuring device are respectively electrically connected with the PLC.
Optionally, the fixed bolster includes support body, four universal gyro wheels and two regulating parts that are used for adjusting the terrain clearance of support body, four universal gyro wheels install in the position department at four angles of the bottom of support body, install respectively at the both ends of the bottom of support body the regulating part, just be provided with second locking mechanism on the universal gyro wheel.
The invention also provides a positioning method of the dummy positioning device for the automobile crash test, which is characterized by comprising the following steps of:
moving the two longitudinal guide rails to two ends of the fixed support respectively, and presetting actually required design coordinates at each position on the dummy body in a control device;
aiming the laser ranging devices on the two longitudinal guide rails at the side surface of a test launching platform, and judging whether the fixed support is parallel to the side surface of the test launching platform or not according to the ranging degrees of the laser ranging devices on the two longitudinal guide rails;
moving the laser range finders on the two longitudinal guide rails to aim at any point on the vehicle body, namely selecting the point as a reference point and inputting the coordinate of the reference point in the coordinate system of the whole vehicle;
moving the laser range finders on the two longitudinal guide rails to aim at any two different positions on the dummy body respectively, and confirming the coordinates of the two positions on the dummy body through the first displacement measuring device and the second displacement measuring device;
and comparing the coordinates of the two positions on the dummy body confirmed by the first displacement measuring device and the second displacement measuring device with the respective design coordinates of the two positions respectively, and judging whether the dummy is accurately positioned.
The embodiment of the invention has the following beneficial effects:
in the automobile crash test process, the dummy positioning device for the automobile crash test can detect the relative distance between the dummy positioning device and the automobile longitudinal plane in the crash test through the laser distance meters on the two longitudinal guide rails, and adjust the distance measurement values of the two laser distance meters to be consistent, so that the dummy positioning device is quantitatively adjusted to be completely parallel to the automobile longitudinal plane, the accuracy of measured data is ensured, and the accuracy of dummy positioning is improved. The first displacement measuring device arranged on the transverse guide rail can respectively detect the movement displacement of the two longitudinal guide rails on the transverse guide rail, the second displacement measuring device arranged on the longitudinal guide rail can respectively detect the movement displacement of the laser ranging device on the longitudinal guide rail, and then the movement displacement detected by the first displacement measuring device and the second displacement measuring device is converted into the coordinate in the reference coordinate system to represent the coordinate of each point on the dummy body, so that the dummy can be conveniently and accurately positioned. The dummy positioning device comprises two sets of measuring units which are laser ranging devices respectively positioned on two longitudinal guide rails, and each measuring unit can independently set the coordinates of different initial reference points in a coordinate system of the whole vehicle and then respectively read the coordinates of target points; different positions can be measured simultaneously by setting the same initial reference point coordinates, and the two data are correlated, so that the coordinates of any two positions can be read, and the relative coordinates between any two positions can be read. The whole dummy positioning device for the automobile crash test has the advantages of simple structure, simple and convenient operation and accurate measurement value, and can greatly improve the dummy positioning efficiency in the crash test. The positioning method based on the dummy positioning device can intuitively read the coordinate parameters required by positioning the dummy in the test through simple operation, and can simultaneously measure the fixed point position coordinates of two parts on the dummy or the relative coordinates between the two fixed point position coordinates, the principle is reliable, the operation is convenient, the test efficiency is greatly improved, the application range is wide, and the method can be popularized to other fields needing to be measured or positioned.
Drawings
FIG. 1 is a schematic view showing the overall structure of a dummy positioning apparatus for a crash test of a vehicle according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a first displacement measuring device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a laser distance measuring device according to an embodiment of the present invention;
FIG. 4 is a schematic structural view of a universal roller and an adjustment member according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a positioning and balancing device according to an embodiment of the present invention;
FIG. 6 is a schematic position diagram of a dummy positioning device for a car crash test according to an embodiment of the present invention in an operating state;
fig. 7 is a flowchart of the operation of the dummy locating apparatus for the car crash test according to the embodiment of the present invention.
Description of reference numerals:
1. the device comprises a launching platform, 2, a vehicle body, 3, a fixed support, 31, a support body, 32, universal rollers, 33, a regulating part, 4, an electric control box body, 41, a touch display screen, 5, a longitudinal guide rail, 51, a second sliding chute, 6, a transverse guide rail, 61, a first sliding chute, 7, a laser distance measuring device, 71, a laser emitter, 72, a laser distance measuring instrument, 8, a first sliding block, 81, a first supporting plate, 82, a first sliding part, 821, a first boss, 9, a second sliding block, 91, a second supporting plate, 92, a second sliding part, 921, a second boss, 10, a first displacement measuring device, 101, a first ruler strip, 102, a first displacement sensor, 11, a second displacement measuring device, 111, a second ruler strip, 112, a second displacement sensor, 12, a positioning balancing device, 121, a connecting rope, 122 and a balancer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Referring to fig. 1 to 6, the dummy positioning device for the automobile crash test according to the preferred embodiment of the present invention includes a fixing bracket 3, a control device, a transverse guide 6, two longitudinal guides 5 parallel to each other, and two laser distance measuring devices 7 for detecting a relative distance between the longitudinal guides 5 and a longitudinal plane of an automobile; the transverse guide rail 6 is fixedly arranged on the fixed bracket 3; the two longitudinal guide rails 5 are respectively vertically and slidably connected to the transverse guide rail 6; the longitudinal guide rails 5 are respectively provided with the slidable laser ranging device 7; the transverse guide rails 6 are respectively provided with a first displacement measuring device 10 for detecting the sliding displacement of each longitudinal guide rail 5 on the transverse guide rails 6, and each longitudinal guide rail 5 is respectively provided with a second displacement measuring device 11 for detecting the sliding displacement of the laser ranging device 7 on the longitudinal guide rails 5; the laser distance measuring device 7, the first displacement measuring device 10 and the second displacement measuring device 11 are respectively electrically or wirelessly connected with the control device.
Based on the structure, the two parallel transverse guide rails 6 are arranged in the preferred embodiment, and can form a frame-shaped structure with the two longitudinal guide rails 5, so that the accuracy of the whole dummy positioning device in the detection process is ensured. Each longitudinal guide rail 5 is vertically connected between two transverse guide rails 6, and the connection between the longitudinal guide rails 5 and the two transverse guide rails 6 is ensured to be slidable, so that the reliable movement of the longitudinal guide rails 5 is effectively realized. When the dummy positioning device is used for dummy positioning operation before the automobile crash test is started, an automobile body 2 in the test is installed on the launching platform 1, the launching platform 1 can provide impact force for the collision of an automobile, the dummy is positioned and fixed in the automobile body 2 according to the test requirement, then the dummy positioning device is placed on the side surface of the automobile sound and is also positioned on the side surface of the launching platform 1, and the two longitudinal guide rails 5 are respectively adjusted to the positions of the two ends of the fixing support 3. Firstly sliding the laser distance measuring device 7 on the longitudinal guide rail 5 to enable the laser distance measuring device 7 to aim at the side surface of the launching platform 1 which is oppositely arranged, then controlling and starting the laser distance measuring device 7 on the longitudinal guide rail 5 by the control device, detecting the relative distance between the dummy positioning device and the side surface of the launching platform 1 by the laser distance measuring device 7 and feeding back the detected relative distance to the control device, adjusting the position of the dummy positioning device according to the relative distance data fed back by the two laser distance measuring devices 7 until the distance measuring values fed back by the two laser distance measuring devices 7 are completely consistent, fixing the position of the dummy positioning device at the moment to ensure that the dummy positioning device is parallel to the side surface of the launching platform 1, and because the longitudinal plane of the automobile body 2 is completely parallel to the side surface of the launching platform 1, the dummy positioning device is also parallel to the longitudinal plane of the automobile body 2, meanwhile, the horizontal state of the transverse guide rail 6 in the device is adjusted, so that a reliable basis is provided for detecting the accuracy of the coordinates at the designated position on the dummy. When the auxiliary dummy starts to be positioned, the laser ranging device 7 emits a light spot to be aligned with a specified position on the automobile body 2 (the specified point on the automobile body 2 and the limitation of the coordinate thereof are confirmed before the test starts), and the coordinate of the specified point position in the whole automobile coordinate system is input into the controller to be used as a reference point. By moving one of the longitudinal guide rails 5 and the laser distance measuring device 7, the light spot of the laser distance measuring device 7 can be aimed at the head mass center (but not limited to the head mass center, and also can be at the positions of the nose tip, the shoulder joint, the knee center and the like) of the dummy inside the automobile body 2, the first displacement measuring device 10 on the transverse guide rail 6 can measure the displacement of the longitudinal guide rail 5 on the transverse guide rail 6, the second displacement measuring device 11 on the longitudinal guide rail 5 can measure the displacement of the laser distance measuring device 7 on the longitudinal guide rail 5, and the coordinate value of the part on the dummy aligned by the laser distance measuring device 7 can be determined by the displacement values detected by the first displacement measuring device 10 and the second displacement measuring device 11. Then the other longitudinal rail 5 and the laser distance measuring device 7 thereon are moved so that the laser distance measuring device 7 can point to other positions on the dummy, and the coordinate value at the second position can be obtained. Therefore, the dummy positioning device can acquire coordinate values of two different positions on the dummy body, the coordinates can be coordinates of two independent positions and can also be relative coordinates between the two coordinates, the coordinates of the position on the dummy body read by the dummy positioning device are compared with the designed coordinates, whether the position where the dummy in the automobile body 2 is placed is accurate or not can be determined, then the position of the dummy is adjusted through the corresponding difference, and finally the dummy can be positioned to meet the test requirement. The dummy positioning device is simply operated, so that the coordinates of the position required by the dummy on the human body can be visually acquired, and the efficiency and the accuracy of positioning the dummy are greatly improved.
Wherein, be provided with two slidable first sliders 8 on the transverse guide 6, each longitudinal rail 5 passes through respectively first slider 8 is connected with transverse guide 6 slidable, be provided with slidable second slider 9 on each longitudinal rail 5 respectively, laser range finder 7 is connected with longitudinal rail 5 slidable through second slider 9, then can drive longitudinal rail 5 through driving first slider 8 and slide on transverse guide 6, drive laser range finder 7 through driving second slider 9 and slide on longitudinal rail 5, guarantee longitudinal rail 5 and the gliding smoothness of laser range finder 7 from this, make installation and operation all more convenient. The dummy positioning device also comprises two positioning balancing devices 12 which are in one-to-one correspondence with the longitudinal guide rails 5, each positioning balancing device 12 comprises a connecting rope 121 and a balancer 122, each balancer 122 is fixedly installed at the upper end of each longitudinal guide rail 5, each connecting rope 121 is connected between each balancer 122 and each second sliding block 9, each second sliding block 9 is provided with a first locking mechanism for positioning each second sliding block 9, each first locking mechanism can lock each second sliding block 9 when the device does not work, the phenomenon that the accuracy of a measuring structure of the device is reduced due to the fact that the second sliding blocks 9 do not move randomly is avoided, when the device needs to work, the first locking mechanism is opened, the second sliding blocks 9 have certain weight, in order to prevent the second sliding blocks 9 from generating free longitudinal displacement due to gravity and causing inaccurate measuring results, and in order to avoid the situation that the second sliding blocks 9 need to be unscrewed and screwed repeatedly when positions are switched in the actual detection process, the operation is inconvenient and time is wasted, so the positioning balance device 12 is installed on the longitudinal guide rail 5, the second sliding block 9 can be connected with the balancer 122 through the connecting rope 121 of the positioning balance device 12, the balancer 122 can automatically adjust the self balancing force according to the weights of different sliding blocks, and the second sliding block 9 can not freely move under the condition that the first locking structure is loosened, so that the locking device does not need to be screwed and unscrewed when different measuring positions are switched, the measuring efficiency can be improved, and the measuring error caused by frequent screwing and unscrewing is eliminated.
In addition, the first displacement measuring device 10 comprises a first ruler strip 101 and two first displacement sensors 102 fixedly arranged on the first sliding block 8 respectively, the first ruler strip 101 is laid on the transverse guide rail 6 along the length direction, the first displacement sensors 102 are vertically arranged with the length direction of the first ruler strip 101, the second displacement measuring device 11 comprises a second ruler strip 111 and a second displacement sensor fixedly arranged on the second sliding block 9, the second ruler strip 111 is laid on the longitudinal guide rail 5 along the length direction, the second displacement sensor is vertically arranged with the length direction of the second ruler strip 111, the first displacement sensor 102 and the second displacement sensor are respectively electrically or wirelessly connected with the control device, therefore, when the longitudinal guide rail 5 slides on the transverse guide rail 6 through the first sliding block 8, the displacement sensor on the first sliding block 8 can work with the first ruler strip 101, the displacement value of the first sliding block 8 on the transverse guide rail 6 is detected, the first displacement sensor 102 can feed the detected displacement value of the first ruler strip 101 back to the control device, and the control device converts the displacement value into corresponding coordinates and displays the coordinates; when the second slider 9 on the longitudinal guide rail 5 slides on the longitudinal guide rail 5, the second displacement sensor on the second slider 9 can cooperate with the second blade 111 to detect the displacement value of the second slider 9 on the longitudinal guide rail 5, and the second displacement sensor can feed back the detected displacement value on the corresponding second blade 111 to the control device, and the detected displacement value is converted into corresponding coordinates by the control device to be displayed. It should be noted that, in the present embodiment, the first displacement sensor 102 and the second displacement sensor are both magnetic grid sensors, and the first blade 101 and the second blade 111 are both magnetic strips, which have high repetition precision and linear precision, so as to effectively ensure the accuracy of the measurement result, but in other embodiments, the selection of the types of the first displacement sensor 102, the second displacement sensor, the first blade 101 and the second blade 111 is not limited by the present embodiment, as long as the displacement values of the first slider 8 on the transverse guide 6 and the second slider 9 on the longitudinal guide 5 can be accurately detected. Referring to fig. 3, the laser distance measuring device 7 includes a laser emitter 71 and a laser distance measuring instrument 72 which are arranged in parallel, the laser emitter 71 and the laser distance measuring instrument 72 are fixedly installed on the same side surface of the second slide block 9, and the laser emitter 71 and the laser distance measuring instrument 72 are respectively electrically connected with the control device, the control device controls the laser emitter 71 and the laser distance measuring instrument 72 simultaneously, the laser emitter 71 generates a light spot which is irradiated on a position to be measured on the dummy body to provide an indication function for measurement and dummy position adjustment, the laser distance measuring instrument 72 transmits the detected distance between the dummy positioning device and the side surface of the launching pad to the control device, and the control device displays the distance on the touch screen.
Further, the first slider 8 includes a first supporting plate 81 and a first sliding member 82, one side surface of the first supporting plate 81 is fixedly connected to the longitudinal rail 5, the first sliding member 82 is fixedly connected to the other side surface of the first supporting plate 81, and the first sliding member 82 is slidably connected to the transverse rail 6, the second slider 9 includes a second supporting plate 91 and a second sliding member 92, the laser emitter 71 and the laser range finder 72 are respectively fixedly mounted on one side surface of the second supporting plate 91, the second sliding member 92 is fixedly connected to the other side surface of the second supporting plate 91, and the second sliding member 92 is slidably connected to the longitudinal rail 5. First backup pad 81 can enough make things convenient for and longitudinal rail 5 between fixed connection, also can make things convenient for arranging of second slider 92 to install, and longitudinal rail 5 passes through bolted connection with first backup pad 81, is convenient for install and dismantles, and first backup pad 81 can distribute longitudinal rail 5 and first slider 82 on relative two surfaces, and each other does not influence, guarantees gliding smooth and easy nature. Second backup pad 91 then is used for guaranteeing the relative arrangement of laser rangefinder 7 and second slider 9, can enough provide great installation area for laser emitter 71 and laser rangefinder 72 of laser rangefinder 7, can conveniently drive laser rangefinder 7 through second slider 92 again and remove. Wherein, be provided with two first bosss 821 on the first slider 82, the contained angle between the symmetry plane of two first bosss 821 is 90, be provided with two first spouts 61 with each first boss 821 one-to-one along length direction on the transverse guide 6, first boss 821 sets up in first spout 61, one of them first spout 61 is located the top of transverse guide 6, on another first spout 61 displacement transverse guide 6 with the adjacent side in top, the stable slip of first slider 82 on transverse guide 6 can be effectively guaranteed in the cooperation of two first bosss 821 and second spout 51, and prevent that first slider 82 from deviating from transverse guide 6, influence the testing result. Be provided with two second bosss 921 on the second slider 92, the contained angle between the plane of symmetry of two second bosss 921 is 90, be provided with two second spouts 51 with each second boss 921 one-to-one along length direction on the longitudinal rail 5, second boss 921 sets up in second spout 51, two second bosss 921 on the second slider 92 can block longitudinal rail 5, in order to guarantee the reliability of being connected with longitudinal rail 5, and prevent that second slider 92 from deviating from the work precision that influences the laser ranging device 7 that is located second backup pad 91 in the course of the work, improve the reliability that whole dummy positioner carried out the coordinate and detects.
In this embodiment, the control device includes an electrical control box 4, a PLC (programmable logic controller, which uses a programmable memory for storing programs therein, executes instructions facing users such as logic operation, sequence control, timing, counting, and arithmetic operation, and controls various types of machinery or production processes through digital or analog input/output), and a touch display 41, the PLC is disposed inside the electrical control box 4, the touch display 41 is disposed on a side surface of the electrical control box 4, the electrical control box 4 is fixedly mounted on the fixed bracket 3, the touch display 41 is electrically connected to the PLC, the laser ranging device 7, the first displacement measuring device 10, and the second displacement measuring device 11 are electrically connected to the PLC, the electrical control box 4 is located on one side of the fixed bracket 3, so as to facilitate a worker to adjust and control the operation of the laser emitter 71, the first displacement measuring device 10, and the second displacement measuring device 11 during a test, the touch display screen 41 on the side surface of the electric control box body 4 can facilitate a worker to manually input the coordinates of the corresponding measuring point on the dummy body in the whole vehicle coordinate system and the coordinates of the initial reference point in the whole vehicle coordinate system, the position coordinates of the corresponding detecting point aligned by the laser transmitter 71 are fed back by the first displacement measuring device 10 and the second displacement measuring device 11, the detected coordinates of the specified point position are displayed by the touch display screen 41, the coordinate values are compared with the coordinate values input in advance to judge whether the coordinate values are consistent, the dummy is adjusted according to the difference until the difference between the coordinate values displayed on the display screen and the coordinate values input in advance is in a regulation specified range, and the positioning of the dummy meets the requirement. The PLC located inside the electric control box body 4 can process the collected displacement values fed back by the laser range finder 72, the first displacement sensor 102 and the second displacement sensor and display the displacement values in a coordinate mode, and workers can conveniently read and confirm the displacement values.
Referring to fig. 1 and 4, the fixing bracket 3 includes a bracket body 31, four universal rollers 32 and two adjusting parts 33 for adjusting the height of the bracket body 31 from the ground, the four universal rollers 32 are mounted at the positions of the four corners of the bottom of the bracket body 31, the adjusting parts 33 are respectively mounted at the two ends of the bottom of the bracket body 31, and the universal rollers 32 are provided with second locking mechanisms, the adjusting parts 33 can change the height of the dummy positioning device from the ground by rotating screws, the universal rollers 32 can facilitate the adjustment of the position of the dummy positioning device by workers, when the parallelism between the dummy positioning device and the longitudinal plane of the automobile body 2 is adjusted by the laser distance measuring device 7, the universal rollers 32 can make the adjustment process simpler, and after the parallelism of the dummy positioning device is maintained, the universal rollers 32 are locked by the second locking mechanisms, therefore, the dummy positioning device can not move randomly in the working process and is always kept at the corresponding parallel position. When the detection of the parallelism of the dummy positioning device is completed, a corresponding goniometer is placed on the transverse guide rail 6, whether data on the goniometer is zero or not is observed, the height of the support body 31 is changed by adjusting the adjusting piece 33 at the bottom of the support body 31, and the degree of the goniometer on the transverse guide rail 6 is zero, so that the transverse guide rail 6 and the dummy positioning device are ensured to be in a horizontal state, and a reliable basis is provided for the accuracy of data detection in the test process.
Referring to fig. 7, the invention further provides a positioning method based on the dummy positioning device for the automobile crash test, which comprises the following steps:
s1, moving the two longitudinal guide rails 5 to the two ends of the fixed support 3 respectively, and presetting actually required design coordinates at each position on the dummy body in a control device;
s2, aiming the laser ranging devices 7 on the two longitudinal guide rails 5 at the side surface of the test launching stand 1, and judging whether the fixed support 3 is parallel to the side surface of the test launching stand 1 according to the ranging degrees of the laser ranging devices 7 on the two longitudinal guide rails 5;
s3, moving the laser range finders on the two longitudinal guide rails to aim at any point on the vehicle body, namely selecting the point as a reference point and inputting the coordinate of the reference point in the coordinate system of the whole vehicle;
s4, moving the laser transmitters 71 on the two longitudinal guide rails 5 to aim at any two different positions on the dummy, and confirming the coordinates of the two positions on the dummy through the first displacement measuring device 10 and the second displacement measuring device 11;
s5, comparing the coordinates of the two positions on the dummy body confirmed by the first displacement measuring device and the second displacement measuring device with the respective design coordinates of the two positions respectively, and judging whether the dummy is positioned accurately.
Based on the steps, the working steps of the dummy positioning device in the automobile crash test specifically comprise:
moving the dummy positioning device to the side surface of a test automobile body 2 above a test launching platform 1, and placing a dummy on an automobile seat according to test requirements;
presetting design coordinates actually required at each position on the dummy body in the automobile in a control device;
two longitudinal guide rails 5 of the dummy positioning device are respectively moved to the positions of two ends of the fixed bracket 3;
starting the laser ranging devices 7 on the second sliding blocks 9, opening the first locking mechanisms on the second sliding blocks 9, sliding the second sliding blocks 9 to enable the laser transmitters 71 on the second sliding blocks to aim at the side surfaces of the test launching platform 1, adjusting the positions of the dummy positioning devices to enable the ranging degrees on the laser ranging devices 72 on the two second sliding blocks 9 to be consistent, ensuring that the fixing support 3 and the side surfaces of the test launching platform 1 are parallel to each other at the moment, and locking the second locking mechanisms on the universal rollers 32;
the real-time angle is detected by the goniometer arranged on the transverse guide rail 6, the height of the whole dummy positioning device is changed by the adjusting piece 33 at the bottom of the displacement bracket body 31 until the numerical value of the goniometer is zero, and the transverse guide rail 6 and the dummy positioning device are both in a horizontal state;
opening a first locking mechanism on a second sliding block 9 of the longitudinal guide rail 5, ensuring that the second sliding block 9 cannot move freely through a positioning balance device 12, controlling a laser ranging device 7 to start working through a control device, adjusting the position of the second sliding block 9 to enable a light spot emitted by a laser emitter 71 of the laser ranging device 7 to irradiate on a specified point (the position and the coordinate of the specified point are both specified by a test consignor), determining the specified point as a reference point and inputting the coordinate of the reference point;
moving one of the longitudinal guide rails 5 and the second slide block 9 thereof to aim the laser transmitter of the corresponding laser distance measuring device 7 at a position on the dummy body, and confirming a first coordinate at the position on the dummy body through the first displacement measuring device 10 and the second displacement measuring device 11;
similarly, the other longitudinal guide 5 and its aforementioned second slide 9 are moved so that the light spot emitted by the laser emitter 71 of the corresponding laser ranging device 7 impinges on the aforementioned reference point and the reference point coordinates are entered for this longitudinal guide 5. Then the other longitudinal guide 5 and the second slide 9 on it are moved so that the laser transmitter 71 of the corresponding laser distance measuring device 7 is aimed at another position on the dummy, and the second coordinate at that position on the dummy is confirmed by the first displacement measuring device 10 and the second displacement measuring device 11;
and respectively judging whether the first coordinate and the second coordinate are consistent with the design coordinates of the preset positions in the control device, if so, determining that the position of the dummy is accurate, and if not, adjusting the position of the dummy until the coordinates can be consistent, thereby completing the accurate positioning of the dummy in the automobile.
In the automobile crash test process, the dummy positioning device for the automobile crash test can detect the relative distance between the dummy positioning device and the automobile longitudinal plane in the crash test through the laser range finders 72 on the two longitudinal guide rails 5, and adjust the distance measurement values of the two laser range finders 72 to be consistent, so that the dummy positioning device is quantitatively adjusted to be completely parallel to the automobile longitudinal plane, the accuracy of measured data is ensured, and the accuracy of dummy positioning is improved. The first displacement measuring device 10 arranged on the transverse guide rail 6 can respectively detect the movement displacement of the two longitudinal guide rails 5 positioned on the transverse guide rail 6, the second displacement measuring device 11 arranged on the longitudinal guide rails 5 can respectively detect the movement displacement of the laser ranging device 7 positioned on the longitudinal guide rails 5, and then the movement displacement detected by the first displacement measuring device 10 and the second displacement measuring device 11 is converted into coordinates in a reference coordinate system to represent the coordinates of each point on the dummy, so that the dummy can be conveniently and accurately positioned. The dummy positioning device comprises two sets of measuring units which are laser ranging devices 7 respectively positioned on two longitudinal guide rails 5, and each measuring unit can independently set the coordinates of different initial reference points in a coordinate system of the whole vehicle and then respectively read the coordinates of a target point; different positions can be measured simultaneously by setting different initial reference point coordinates, and the two data are correlated, so that the relative coordinates between any two positions are read. The whole dummy positioning device for the automobile crash test has the advantages of simple structure, simple and convenient operation and accurate measurement value, and can greatly improve the dummy positioning efficiency in the crash test. The positioning method based on the dummy positioning device can intuitively read the coordinate parameters required by positioning the dummy in the test through simple operation, and can simultaneously measure the fixed point position coordinates of two parts on the dummy or the relative coordinates between the two fixed point position coordinates, the principle is reliable, the operation is convenient, the test efficiency is greatly improved, the application range is wide, and the method can be popularized to other fields needing to be measured or positioned.
It should be understood that the terms "first", "second", etc. are used herein to describe various information, but the information should not be limited to these terms, which are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.
The foregoing is directed to the preferred embodiment of the present invention, and it is understood that various changes and modifications may be made by one skilled in the art without departing from the spirit of the invention, and it is intended that such changes and modifications be considered as within the scope of the invention.
Claims (10)
1. A dummy positioning device for an automobile crash test is characterized by comprising a fixed bracket, a control device, a transverse guide rail, two longitudinal guide rails which are parallel to each other and two laser ranging devices;
the transverse guide rail is fixedly arranged on the fixed bracket;
the two parallel longitudinal guide rails are respectively connected to the transverse guide rails in a vertical and slidable manner;
the two parallel longitudinal guide rails are respectively provided with the laser ranging device in a sliding manner;
the two parallel longitudinal guide rails are respectively provided with a second displacement measuring device for detecting the sliding displacement of the laser ranging device on the longitudinal guide rails;
the laser ranging device, the first displacement measuring device and the second displacement measuring device are respectively electrically or wirelessly connected with the control device.
2. The dummy positioning device for automobile crash test as claimed in claim 1, wherein two first sliding blocks are provided on the transverse rail, and the two parallel longitudinal rails are slidably connected to the transverse rail through the first sliding blocks, respectively;
and a second sliding block capable of sliding is arranged on each longitudinal guide rail, and the laser ranging device is connected with the longitudinal guide rails in a sliding manner through the second sliding blocks.
3. The dummy positioning apparatus for automobile crash test as claimed in claim 2, further comprising two positioning and balancing means corresponding to the two parallel longitudinal rails, wherein the positioning and balancing means comprises a connecting rope and a balancer, the balancer is fixedly installed at the upper end of the longitudinal rails, the connecting rope is connected between the balancer and the second slider, and the second slider is provided with a first locking mechanism for locking the second slider.
4. The dummy positioning apparatus for automobile crash test as set forth in claim 3, wherein said first displacement measuring means includes a first blade and two first displacement sensors fixedly mounted on said first slider respectively, said first blade being laid on said cross rail in a length direction;
the second displacement measuring device comprises a second ruler strip and a second displacement sensor fixedly mounted on the second sliding block, and the second ruler strip is laid on the longitudinal guide rail along the length direction;
the first displacement sensor and the second displacement sensor are respectively electrically or wirelessly connected with the control device.
5. The dummy positioning device for the automobile crash test as set forth in any one of claims 2 to 4, wherein the laser ranging device comprises a laser emitter and a laser range finder arranged side by side, the laser emitter and the laser range finder are fixedly mounted on the same side of the second slider, and the laser emitter and the laser range finder are respectively electrically or wirelessly connected with the control device.
6. The dummy positioning apparatus for automobile crash test as set forth in claim 5, wherein the first slider comprises a first support plate and a first slider, one side surface of the first support plate is fixedly connected to the longitudinal rail, the first slider is fixedly connected to the other side surface of the first support plate, and the first slider is slidably connected to the lateral rail;
the second slider includes second backup pad and second slider, laser emitter with laser range finder fixed mounting respectively on a side of second backup pad, second slider fixed connection in on another side of second backup pad, just the second slider with longitudinal rail slidable connects.
7. The dummy positioning device for automobile crash tests as claimed in claim 6, wherein the first sliding member is provided with two first bosses, the transverse rail is provided with two first sliding grooves corresponding to the first bosses one by one along the length direction, and the first bosses are arranged in the first sliding grooves;
the second sliding part is provided with two second bosses, the longitudinal guide rail is provided with two second sliding grooves which correspond to the second bosses one to one along the length direction, and the second bosses are arranged in the second sliding grooves.
8. The dummy positioning device for the automobile crash test as set forth in claim 5, wherein the control device comprises an electric control box, a PLC and a touch display screen, the PLC is disposed inside the electric control box, the touch display screen is disposed on a side surface of the electric control box, the electric control box is fixedly mounted on the fixing bracket, the touch display screen is electrically connected to the PLC, and the laser ranging device, the first displacement measuring device and the second displacement measuring device are respectively electrically connected to the PLC.
9. The dummy positioning apparatus for automobile crash test as claimed in claim 1, wherein the fixing bracket comprises a bracket body, four universal rollers and two adjusting members for adjusting the height of the bracket body from the ground, the four universal rollers are mounted at four corners of the bottom of the bracket body, the adjusting members are mounted at two ends of the bottom of the bracket body, and the universal rollers are provided with second locking mechanisms.
10. A positioning method of the dummy positioning apparatus for the automobile crash test based on any one of claims 1 to 9, characterized by comprising the steps of:
moving the two longitudinal guide rails to two ends of the fixed support respectively, and presetting actually required design coordinates at each position on the dummy body in a control device;
aiming the laser ranging devices on the two longitudinal guide rails at the side surface of a test launching platform, and judging whether the fixed support is parallel to the side surface of the test launching platform or not according to the ranging degrees of the laser ranging devices on the two longitudinal guide rails;
moving the laser range finders on the two longitudinal guide rails to aim at any point on the vehicle body, namely selecting the point as a reference point and inputting the coordinate of the reference point in the coordinate system of the whole vehicle;
moving the laser range finders on the two longitudinal guide rails to aim at any two different positions on the dummy body respectively, and confirming the coordinates of the two positions on the dummy body through the first displacement measuring device and the second displacement measuring device;
and comparing the coordinates of the two positions on the dummy body confirmed by the first displacement measuring device and the second displacement measuring device with the respective design coordinates of the two positions respectively, and judging whether the dummy is accurately positioned.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910230295.4A CN111735636A (en) | 2019-03-25 | 2019-03-25 | Dummy positioning device and dummy positioning method for automobile crash test |
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| CN201910230295.4A CN111735636A (en) | 2019-03-25 | 2019-03-25 | Dummy positioning device and dummy positioning method for automobile crash test |
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| CN113686244A (en) * | 2021-09-23 | 2021-11-23 | 中车大同电力机车有限公司 | Detection device |
| CN115077427A (en) * | 2022-07-20 | 2022-09-20 | 中汽研汽车检验中心（天津）有限公司 | Verticality measuring tool and method for collision dummy arm framework |
| CN117190944A (en) * | 2023-11-08 | 2023-12-08 | 中国汽车技术研究中心有限公司 | Auxiliary measuring device and method for measuring automobile collision dummy |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112791592A (en) * | 2020-12-31 | 2021-05-14 | 湖北中泉环保技术有限公司 | Membrane shell barrel machining tool for ultrafiltration membrane |
| CN112791592B (en) * | 2020-12-31 | 2023-06-23 | 湖北中泉环保技术有限公司 | Membrane shell cylinder machining tool for ultrafiltration membrane |
| CN113686244A (en) * | 2021-09-23 | 2021-11-23 | 中车大同电力机车有限公司 | Detection device |
| CN113686244B (en) * | 2021-09-23 | 2024-04-09 | 中车大同电力机车有限公司 | Detection device |
| CN115077427A (en) * | 2022-07-20 | 2022-09-20 | 中汽研汽车检验中心（天津）有限公司 | Verticality measuring tool and method for collision dummy arm framework |
| CN117190944A (en) * | 2023-11-08 | 2023-12-08 | 中国汽车技术研究中心有限公司 | Auxiliary measuring device and method for measuring automobile collision dummy |
| CN117190944B (en) * | 2023-11-08 | 2024-03-22 | 中国汽车技术研究中心有限公司 | Auxiliary measuring device and method for measuring automobile collision dummy |
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