Bumper angle measuring tool and bumper angle measuring system
By designing a bumper angle measurement tool for including pressure sensors, switching circuits and laser emitters, the problem that bumper angle measurement results are greatly affected by operators in the prior art is solved, and higher measurement accuracy and longer equipment service life are achieved.
Patent Information
- Application Number
- CN202422235596.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-10
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-09-10
AI Technical Summary
In the prior art, the bumper angle position measurement results are greatly affected by the operator and have poor accuracy.
A bumper angle measurement tool is designed, including a plate body, a pressure sensor, a mounting piece, a switching circuit and a laser emitter. By setting the pressure sensor on the vertical center line of the plate body and detecting contact between the plate body and the bumper using the switching circuit and the state light, the laser emitter marks the Y value equivalent to the contact point.
The function of directly detecting the contact between the vertical center line of the plate and the vehicle is realized, reducing the subjective influence of the operation steps and operators, improving measurement accuracy, and extending the service life of the equipment.
Smart Images
Figure CN222993713U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vehicle testing devices, in particular to a bumper corner measurement tooling and a bumper corner measurement system. Background Art
[0002] In the process of vehicle development, pedestrian protection tests need to be carried out. Among them, the Y coordinate value of the bumper corner in the vehicle coordinate system is the test boundary. Whether the Y coordinate value of the bumper corner is measured accurately has a great influence on the selection of boundary test points. Among them, the Y axis is perpendicular to the vertical plane of the vehicle longitudinal center, and the vehicle longitudinal center plane Y = 0. During the experiment, the front surface of a square plate in a vertical plane at an angle of 60° to the vehicle longitudinal vertical plane is tangent to the bumper surface. The contact point between the vertical center line of the front surface of the square plate and the bumper surface is the bumper corner. At present, a transparent plate tooling is mostly used for measurement in the industry. The transparent plate is installed on a measurement bracket that can move along the X, Y, and Z axes relative to the vehicle. A pigment is applied to the vertical center line of the transparent plate. During the measurement process, by moving the measurement bracket, the transparent plate is driven to move until the center line of the transparent plate is tangent to the bumper surface, and it is observed by the human eye whether the bumper is stained with the pigment. The pigment mark is the contact point between the vertical center line of the square plate and the bumper. Then, the Y coordinate value of the contact point is measured by equipment such as a coordinate measuring machine.
[0003] However, in the actual operation process, the thickness and width of the pigment applied to the vertical center line of the transparent plate will affect the shape of the contact mark and the accuracy of the contact position. In addition, since the bumper is not a rigid body and can deform to a certain extent, the magnitude of the operating force of the personnel during contact will also affect the position of the mark, resulting in possible differences in the measurement results of different personnel. The measurement results are greatly affected by the operator and the accuracy is poor. Summary of the Utility Model
[0004] One of the purposes of the utility model is to provide a bumper corner measurement tooling to solve the problem that the measurement result of the bumper corner position in the prior art is greatly affected by the operator and the accuracy is poor; the second purpose is to provide a bumper corner measurement system.
[0005] In order to achieve the above purposes, the technical scheme adopted by the utility model is as follows:
[0006] The present utility model provides a bumper corner measurement tooling, comprising: a plate body having a first side surface and a second side surface oppositely arranged along its thickness direction; a pressure sensor disposed on the first side surface of the plate body, and the pressure sensor is disposed on the first median line of the first side surface of the plate body; a mounting member fixedly connected to the second side surface of the plate body, the central line of the mounting member is obliquely intersecting with the second side surface of the plate body, and the projection of the mounting member on the plate body is perpendicular to the first median line on the first side surface, and the mounting member is adapted to be mounted on a measurement bracket to move along with the measurement bracket; a switch circuit electrically connected to the pressure sensor, the switch circuit is adapted to be turned on when the pressure sensor is pressed, and a status light is disposed on the switch circuit, and the status light is lit when the switch circuit is turned on; a laser emitter connected to the plate body and located on the second side of the plate body, and the laser emitted by the laser emitter is parallel to the central line of the mounting member and intersects with the extension line of the first median line.
[0007] Optionally, the bumper corner measurement tooling further comprises: a fixing bracket fixedly connected to the plate body, an installation hole is formed in the fixing bracket, the central line of the installation hole is parallel to the central line of the mounting member and intersects with the extension line of the first median line, the laser emitter is installed in the installation hole, and the central line of the installation hole coincides with the laser emitted by the laser emitter.
[0008] Optionally, a groove is formed on the first side surface of the plate body, the groove coincides with the first median line on the first side surface of the plate body, and the pressure sensor is installed in the groove.
[0009] Optionally, the pressure sensor is a thin film pressure sensor, the thin film pressure sensor comprises a sensing area and a wiring terminal, the sensing area is located in the groove, the wiring terminal extends out of the plate body, and the wiring terminal is electrically connected to the switch circuit.
[0010] Optionally, a comparator is disposed on the switch circuit, the thin film pressure sensor is connected to one end of the comparator, a resistance element is connected to the other end of the comparator, the resistance of the thin film pressure sensor is adapted to decrease when the sensing area is pressed, and the switch circuit is adapted to be turned on when the resistance of the thin film pressure sensor decreases to be less than a preset resistance value of the resistance element.
[0011] Optionally, the width of the groove is equal to the width of the pressure sensor, and the depth of the groove is equal to the thickness of the pressure sensor.
[0012] Optionally, a connection hole is formed on the mounting member, and the mounting member is adapted to be connected to the measurement bracket through the connection hole.
[0013] Optionally, the plate body is a transparent plate.
[0014] The utility model also provides a bumper corner measurement system, comprising: a measurement bracket, including a bracket body and an X-direction moving arm, a Y-direction sliding table, and a Z-direction sliding table that can move relative to the bracket body; the above-mentioned bumper corner measurement tooling, which is detachably connected to the X-direction moving arm.
[0015] Optionally, a measurement scale in the Y-axis direction is provided on the bracket body to measure the position of the Y-direction sliding table.
[0016] The beneficial effects of the utility model are as follows: By arranging the pressure sensor on the first center line of the first side of the plate body, during the process of measuring the bumper corner when the measurement tooling moves driven by the measurement bracket, the pressure sensor can be used to contact the bumper corner. At the same time, by arranging a switch circuit electrically connected to the pressure sensor, the status light on the switch circuit lights up when the pressure sensor contacts the bumper corner, realizing direct detection of whether the vertical center line of the plate body contacts the vehicle and being displayed by the status light. Moreover, the laser emitter can mark a measurement point equivalent to the Y value of the contact point on the vehicle after the status light lights up, realizing the detection and marking of the position of the bumper corner. The detection circuit composed of the pressure sensor and the switch circuit is simple and reliable, without complex structures, the manufacturing method is simple, the response is rapid and the accuracy is high. It no longer relies on the human eye and pigments for identification, reducing the operation steps, being easy to operate, reducing the subjective influence of the operator, improving the test accuracy, and the pressure sensor, laser emitter and switch circuit have a long service life, are not easily damaged, have good durability, can be reused, reducing the use of consumables, and being beneficial to reducing the use cost. Description of the Drawings
[0017] Figure 1 is an assembly drawing of a bumper corner measurement tooling according to an embodiment of the utility model;
[0018] Figure 2 is Figure 1 an exploded view of the shown bumper corner measurement tooling;
[0019] Figure 3 is a structural schematic diagram of the tooling body according to an embodiment of the utility model;
[0020] Figure 4 is a structural schematic diagram of the thin-film pressure sensor according to an embodiment of the utility model;
[0021] Figure 5 is a schematic diagram of the detection circuit composed of the pressure sensor and the switch circuit according to an embodiment of the utility model;
[0022] Figure 6Schematic structural diagram of the bumper corner measurement system according to an embodiment of the present utility model;
[0023] Figure 7 Schematic diagram of the measurement application of the bumper corner measurement system according to an embodiment of the present utility model.
[0024] Among them, 1 - tooling body; 101 - plate body; 102 - mounting member; 103 - fixing bracket; 104 - mounting hole; 105 - groove; 106 - connecting hole; 2 - pressure sensor; 201 - sensing area; 202 - wiring terminal; 3 - switch circuit; 301 - power supply lamp; 302 - status lamp; 303 - first power supply wire; 304 - comparator; 305 - signal input terminal; 4 - laser emitter; 401 - second power supply wire; 5 - connecting wire; 6 - measurement bracket; 600 - bracket body; 601 - X-direction moving arm; 602 - Y-direction sliding table; 603 - Z-direction sliding table; 604, slide rail; 7 - vehicle longitudinal vertical plane; 8 - bumper corner. Specific embodiments
[0025] The following will describe the embodiments of the present utility model with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model. It should be understood that the preferred embodiments are only for explaining the present utility model, rather than for limiting the protection scope of the present utility model.
[0026] It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present utility model in a schematic manner. Therefore, only the components related to the present utility model are shown in the diagrams, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.
[0027] The following will be combined with Figures 1 to 7 , to describe the embodiments of the present utility model.
[0028] This embodiment provides a bumper corner measurement tooling, including: a plate body 101, a pressure sensor 2, a mounting member 102, a switch circuit 3, and a laser emitter 4. The plate body 101 has a first side surface and a second side surface oppositely arranged along its thickness direction; the pressure sensor 2 is arranged on the first side surface of the plate body 101, and the pressure sensor 2 is arranged on the first center line on the first side surface of the plate body 101; the mounting member 102 is fixedly connected to the second side surface of the plate body 101, the center line of the mounting member 102 is obliquely intersecting with the second side surface of the plate body 101, and the projection of the mounting member 102 on the plate body 101 is perpendicular to the first center line on the first side surface. The mounting member 102 is adapted to be mounted on the measurement bracket 6 to move along with the measurement bracket 6; the switch circuit 3 is electrically connected to the pressure sensor 2, and the switch circuit 3 is adapted to be turned on when the pressure sensor 2 is pressed. A status light 302 is arranged on the switch circuit 3, and the status light 302 lights up when the switch circuit 3 is turned on; the laser emitter 4 is connected to the plate body 101 and is located on the second side of the plate body 101. The laser emitted by the laser emitter 4 is parallel to the center line of the mounting member 102 and intersects with the extension line of the first center line.
[0029] It should be noted that the thickness direction refers to Figure 3 the "thickness direction" indicated by the arrow in; the first side surface and the second side surface are two relatively large surfaces on the plate body 101, and the first side surface is parallel to the second side surface; there is at least one center line on the first side surface of the plate body 101, the first center line is one of the at least one center line, and the first side surface is symmetric about the first center line; during the use of the bumper corner measurement tooling, the first center line is parallel to the Z axis in the rectangular coordinate system, and the first center line is called the vertical center line of the plate body 101; the center line of the mounting member 102 is obliquely intersecting with the second side surface of the plate body 101, then the included angle between the center line of the mounting member 102 and the second side surface of the plate body 101 is non-right angle, denoted as a preset angle, so as to ensure that when the bumper corner test tooling is installed on the measurement bracket 6 and the center line of the mounting member 102 is parallel to the X axis, the included angle between the plane where the first side surface of the plate body 101 is located and the vehicle longitudinal vertical plane 7 is equal to the preset angle. Among them, the rectangular coordinate system refers to the vehicle coordinate system, such as Figure 7 the XY plane shown is the XY plane in the vehicle coordinate system, and the Z axis is perpendicular to the XY plane (not shown in the figure), and the vehicle longitudinal vertical plane 7 passes through the vehicle center and is located on the XZ plane.
[0030] In the pedestrian protection test, the bumper corner to be measured is the front bumper corner. The test standard stipulates that the front bumper corner refers to the contact point between the vehicle and the vertical plane that forms a 60° angle with the vehicle's longitudinal vertical plane 7 and is tangent to the outer surface of the bumper. Therefore, it is stipulated that the preset angle between the center line of the mounting member 102 and the second side surface of the plate body 101 is 60°. Then, when the mounting member 102 is mounted on the X-direction moving arm 601 of the measuring bracket 6, the second side surface of the plate body 101 is parallel to the Z-axis and forms a 60° angle with the vehicle's longitudinal vertical plane 7. Also, since the first side surface is parallel to the second side surface, the first side surface is parallel to the Z-axis and forms a 60° angle with the vehicle's longitudinal vertical plane 7, and the first side surface faces the vehicle. When the first center line of the first side surface of the plate body 101 contacts the bumper, the position where the first center line (except the endpoints) contacts the outer surface of the front bumper is the front bumper corner.
[0031] For the bumper corner measuring tooling of this embodiment, by setting the mounting member 102 to be obliquely intersecting with the second side surface of the plate body 101 and the projection of the mounting member 102 on the plate body 101 being perpendicular to the first center line on the first side surface, it can be ensured that when the bumper corner measuring tooling is mounted on the measuring bracket 6 through the mounting member 102, the first side surface forms an included angle with the vehicle's longitudinal vertical plane 7 and the first center line is parallel to the Z-axis, thus meeting the standard of the measuring tooling for measuring the bumper corner; since the laser emitted by the laser emitter 4 is parallel to the center line of the mounting member 102 and intersects with the extension line of the first center line, the position where the laser emitted by the laser emitter 4 hits the vehicle surface is the intersection point of the laser and the extension line of the first center line. When the first center line is parallel to the Z-axis, the Y coordinate value of this point is the same as the Y coordinate value of the contact point between the first center line and the vehicle surface. Therefore, a point with the same Y coordinate value as the vertical center line of the plate body 101 can be marked on the vehicle body through the laser.
[0032] When applying the bumper corner measurement tooling of this embodiment, by arranging the pressure sensor 2 on the first center line of the first side of the plate body 101, during the process of measuring the bumper corner while the measurement tooling moves driven by the measurement bracket 6, the pressure sensor 2 can be used to contact the bumper corner 8. At the same time, by arranging the switch circuit 3 electrically connected to the pressure sensor 2, the status light 302 on the switch circuit 3 lights up when the pressure sensor 2 contacts the bumper corner 8, realizing the direct detection of whether the vertical center line of the plate body 101 contacts the vehicle and being displayed by the status light 302. Moreover, the laser emitter 4 can mark a measurement point equivalent to the Y value of the contact point on the vehicle after the status light lights up, realizing the detection and marking of the position of the bumper corner 8. The detection circuit composed of the pressure sensor 2 and the switch circuit 3 is simple and reliable, without a complex structure, has a simple manufacturing method, is responsive and highly accurate, no longer requires human eyes and pigments for identification, reduces the operation steps, is easy to operate, reduces the subjective influence of the operator, improves the test accuracy, and the pressure sensor 2, the laser emitter 4 and the switch circuit 3 have a long service life, are not easily damaged, have good durability, can be reused, reduce the use of consumables, and are beneficial to reducing the use cost.
[0033] In this embodiment, the pressure sensor 2, the switch circuit 3 and the laser emitter 4 are installed on the plate body 101 to form a bumper corner measurement tooling to realize the function of detecting the bumper corner. Since the power consumption of the switch circuit 3 and the laser emitter 4 is extremely low, the battery can be used for a long time. If a power adapter is used for power supply, no consumables are required and there is almost no use cost.
[0034] In this embodiment, the plate body 101 is a transparent plate, which is convenient for observation and is beneficial to further improving the measurement accuracy.
[0035] Preferably, the plate body 101 is a transparent square plate, with a simple structure and convenient for use. Further preferably, the measurement plate body 101 is a square transparent plate with a side length of 236 mm.
[0036] In this embodiment, the bumper corner measurement tooling further includes: a fixing bracket 103 fixedly connected to the plate body 101. An installation hole 104 is formed in the fixing bracket 103. The center line of the installation hole 104 is parallel to the center line of the installation part 102 and intersects with the extension line of the first median line. The laser emitter 4 is installed in the installation hole 104, and the center line of the installation hole 104 coincides with the laser emitted by the laser emitter 4. The plate body 101, the installation part 102 fixedly connected thereto, and the fixing bracket 103 form a tooling body 1. By arranging the fixing bracket 103 on the plate body 101 and forming the installation hole 104 in the fixing bracket 103, it is convenient to install and fix the laser emitter 4, improving the stability of the laser emitter 4. By setting the center line of the installation hole 104 to be parallel to the center line of the installation part 102 and intersect with the extension line of the first median line, and the center line of the installation hole 104 coincides with the laser emitted by the laser emitter 4, it is ensured that the laser emitted by the laser emitter 4 is parallel to the center line of the installation part 102 and intersects with the extension line of the first median line, thus ensuring the reliability of the laser marking result.
[0037] Preferably, the installation hole 104 is a through hole, and the diameter of the installation hole 104 is the same as the outer diameter of the laser emitter 4, further ensuring that the center line of the installation hole 104 coincides with the laser emitted by the laser emitter 4.
[0038] In this embodiment, a groove 105 is formed on the first side surface of the plate body 101. The groove 105 coincides with the first median line on the first side surface of the plate body 101. A pressure sensor 2 is installed in the groove 105. It should be noted that the groove 105 penetrates the entire first side surface along the first median line, and the first side surface is evenly divided into two parts by the groove 105. The center of the groove 105 coincides with the first median line. By forming the groove 105 on the first median line of the first side surface of the plate body 101 for arranging the pressure sensor 2, the installation of the pressure sensor 2 is realized, improving the stability of the arrangement position of the pressure sensor 2 on the plate body 101, ensuring that the pressure sensor 2 always coincides with the first median line of the plate body 101, so that when the pressure sensor 2 contacts the vehicle, it is the first median line of the plate body 101 that contacts the vehicle, thereby improving the accuracy of the measurement result.
[0039] In this embodiment, the pressure sensor 2 is a thin-film pressure sensor. The thin-film pressure sensor includes a sensing area 201 and a connection terminal 202. The sensing area 201 is located in the groove 105, and the connection terminal 202 extends out of the plate body 101. The connection terminal 202 is electrically connected to the switch circuit 3. The thin-film pressure sensor has mature technology and a simple structure. The sensing area 201 of the thin-film sensor is strip-shaped, which is convenient for arranging in the groove 105. By setting the sensing area 201 of the pressure sensor 2 in the groove 105, the groove 105 realizes the positioning and protection of the sensing area 201. The connection terminal 202 extends out of the plate body 101, which is convenient for connecting with the switch circuit 3. Among them, the sensing area 201 fills the entire groove 105, that is, it penetrates the first side of the plate body 101 along the extension direction of the first center line.
[0040] It should be noted that when a pressure is applied to the sensing area 201 of the thin-film pressure sensor, the resistance between the connection pins of the connection terminal 202 of the thin-film pressure sensor becomes smaller; when the thin-film pressure sensor contacts the vehicle bumper and applies a certain contact force, if the resistance of the thin-film pressure sensor is lower than the set value of the switch circuit 3 at this time, the status light 302 lights up, indicating that the vertical center line of the plate body 101 has contacted the vehicle front bumper. By using the thin-film pressure sensor to detect whether the first center line of the plate body 101 contacts the vehicle front bumper, instead of identifying it by human eyes and pigments, the operation steps are reduced, the subjective influence of the operator is reduced, and the test accuracy is improved.
[0041] In this embodiment, the width of the sensing area 201 of the thin-film pressure sensor 2 is about 2 mm to 4 mm (the narrower the sensing area, the better), the thickness is less than 0.5 mm, and the length is about 240 mm (the effective detection length is close to 236 mm). The size of the connection terminal 202 extending out of the plate body 101 is greater than 10 mm, which is convenient for arrangement. It should be noted that since the product quality of thin-film pressure sensors on the market varies, it is necessary to check the performance before putting them into use. Specifically, a slight (about 0.5 N) pressure is applied through a 2-mm loading head at any position of the sensing area 201 of the thin-film pressure sensor, and it is measured whether the resistance value between the two pins of the connection terminal 202 of the thin-film pressure sensor can be normally reduced. If it can be normally reduced, it is qualified.
[0042] In this embodiment, a comparator 304 is provided on the switch circuit 3. The thin-film pressure sensor is connected to one end of the comparator 304, and a resistor element is connected to the other end of the comparator 304. The resistance of the thin-film pressure sensor is adapted to decrease when the sensing area 201 is pressed. The switch circuit 3 is adapted to conduct when the resistance of the thin-film pressure sensor decreases to be less than the preset resistance value of the resistor element. The switch circuit 3 is commercially available with mature technology and high reliability. By connecting the thin-film pressure sensor to one end of the comparator 304 on the switch circuit 3, the on / off of the switch circuit 3 is controlled by whether the resistance value of the thin-film pressure sensor is lower than the preset resistance value of the resistor element at the other end of the comparator, with a high degree of automation and convenience for observation and use.
[0043] It should be noted that the switch circuit 3 selects a commercially available product, which is mainly composed of a comparator 304 and a resistor element soldered on a circuit board. Specifically, the comparator 304 is an LM393 comparator, the resistor element includes a 3362 adjustable resistor and a fixed-value resistor, and the switch circuit 3 further includes a power supply lamp 301 for indicating whether the switch circuit 3 is in normal use. When in use, the switch circuit 3 is powered by a 5V battery or a first power supply line 303, and the power supply lamp 301 will light up; then, by adjusting the 3362 adjustable resistor, the voltage at the inverting terminal of the LM393 comparator is set; the pressure sensor 2 is connected to the signal input terminal 305 of the switch circuit 3. When the pressure on the sensing area 201 of the pressure sensor gradually increases, the resistance of the pressure sensor 2 will gradually decrease, which will cause the voltage at the non-inverting terminal of the LM393 comparator to gradually decrease; when the voltage at the non-inverting terminal of the comparator is less than the voltage at the inverting terminal, the LM393 comparator will output a low-level signal (similar to a switch signal). At this time, the switch circuit 3 conducts, and the status lamp 302 will light up.
[0044] Specifically, the setting process of the adjustable resistor in the switch circuit 3 is as follows:
[0045] Calculate the preset resistance value of the adjustable resistor according to the resistance value of the thin-film pressure sensor; connect the wiring terminal 202 of the pressure sensor 2 to the signal input terminal 305 of the switch circuit 3 using a connection wire 5, and power the switch circuit through the first power supply line 303; test whether the status lamp 302 on the switch circuit 3 lights up normally when the sensing area 201 of the pressure sensor 2 is slightly loaded (about 0.5N); if the status lamp 302 shows normal, it means that the adjustable resistor has been set.
[0046] Alternatively, the wiring terminal 202 of the pressure sensor 2 can also be connected to the sensor access end of the switch circuit 3 using the connection wire 5 first, and the switch circuit 3 is powered through the first power supply wire 303. A slight loading force (about 0.5 N) is first applied to the sensing area 201 of the pressure sensor 2, and then the voltage at the inverting input terminal of the LM393 comparator is increased by adjusting the adjustable resistor of the switch circuit 3 until the status light 302 just lights up. Then, it is checked whether the status light 302 can be normally turned off after the sensing area 201 is unloaded. If the status light 302 shows normal, it means that the adjustable resistor has been set and no further setting is required later. Settings are only needed when the sensitivity of the sensing contact needs to be changed.
[0047] In this embodiment, the width of the groove 105 is equal to the width of the pressure sensor 2, and the depth of the groove 105 is equal to the thickness of the pressure sensor 2. The sensing area 201 of the pressure sensor 2 is completely embedded in the groove 105, making the sensing area 201 of the pressure sensor 2 flush with the surface of the plate body 101, avoiding the pressure sensor 2 protruding from the surface of the plate body 101, so as to ensure that the contact between the pressure sensor 2 and the vehicle is the contact between the first midline on the first side of the plate body 101 and the vehicle, thereby further improving the accuracy of the measurement result.
[0048] In this embodiment, the pressure sensor 2 is bonded in the groove 105 with double-sided tape, which has a simple structure, is easy to install and has a low cost.
[0049] In this embodiment, the switch circuit 3 is arranged on the side surface of the mounting member 102. The switch circuit 3 is bonded to the mounting member 102 with double-sided tape or fixed to the mounting member 102 with bolts.
[0050] In this embodiment, the mounting member 102 is provided with a connection hole 106, and the mounting member 102 is adapted to be connected to the measuring bracket 6 through the connection hole 106. By providing the connection hole 106 on the mounting member 102, it is convenient to install the mounting member 102 on the measuring bracket 6. The connection hole 106 has a simple structure, is easy to process, has a low cost and a high connection reliability. Specifically, the bumper corner measuring tooling needs to be installed on the measuring bracket 6 that can move in the X, Y, and Z axes relative to the vehicle through the mounting member 102. Fixed holes corresponding to the connection hole 106 are provided on the X-direction moving arm 601 of the measuring bracket 6, and bolts can be used to connect the connection hole 106 and the fixed hole, thereby realizing the installation of the mounting member 102 on the measuring bracket 6.
[0051] Preferably, the number of the connection holes 106 is two, which can further improve the connection stability between the mounting member 102 and the measuring bracket 6.
[0052] Preferably, the mounting member 102 is selectively connected to both the positive and negative sides of the measuring bracket 6 along the positive Y-axis direction, enabling front-mounted and reverse-mounted configurations, so as to be able to measure the bumper corners on the left and right sides (i.e., along the positive and negative Y-axis directions). It should be noted that during the use of the bumper corner measuring tooling, the first side of the plate body 101 needs to face the vehicle and form a 60° angle with the longitudinal vertical plane 7 of the vehicle.
[0053] Preferably, the mounting member 102 is a mounting rod, which has a simple structure and is easy to process; the axis of the mounting rod forms a 60° angle with the first side of the plate body 101. It can be understood that as an alternative embodiment, the mounting member 102 can also be a mounting plate or a mounting block, etc.
[0054] This embodiment also proposes a bumper corner measuring system, including: a measuring bracket 6 and the above-mentioned bumper corner measuring tooling. The measuring bracket 6 includes a bracket body 600 and an X-direction moving arm 601, a Y-direction sliding table 602, and a Z-direction sliding table 603 that can move relative to the bracket body 600; the bumper corner measuring tooling is detachably connected to the X-direction moving arm 601. By driving the bumper corner measuring tooling to move through the measuring bracket 6, the measurement of the bumper corner is realized.
[0055] Specifically, the bracket body 600 is placed on the base surface (usually the ground) where the vehicle is placed. A slide rail 604 parallel to the Y-axis is provided on the bracket body 600, and the Y-direction sliding table 602 is movably connected to the slide rail 604 to realize the movement of the Y-direction sliding table 602 along the Y direction; the Z-direction sliding table 603 is movably connected to the Y-direction sliding table 602, and the Z-direction sliding table 603 can move relative to the Y-direction sliding table 602 along the Z direction; the X-direction moving arm 601 is movably connected to the Z-direction sliding table 603, and the X-direction moving arm 601 can move relative to the Z-direction sliding table 603 along the X direction; through the cooperation of the X-direction moving arm 601, the Y-direction sliding table 602, and the Z-direction sliding table 603, the driving of the bumper corner measuring tooling to move within the rectangular coordinate system can be realized. Among them, X, Y, and Z refer to the coordinate axes of the vehicle rectangular coordinate system XYZ as shown in Figure 7 shown.
[0056] In this embodiment, a measuring scale along the Y-axis direction is provided on the bracket body 600 to measure the position of the Y-direction sliding table 602. By providing a measuring scale along the Y-axis direction on the bracket body 600, it is convenient to directly measure the position of the Y-direction sliding table 602, so that the coordinate difference can be calculated based on the values of the Y-direction sliding table 602 at the initial position and the position of measuring the bumper corner on the measuring scale respectively, and then the Y-direction coordinate value of the bumper corner in the vehicle rectangular coordinate system can be determined, which is convenient for operation and use and reduces the requirements for testing equipment.
[0057] It can be understood that as an alternative embodiment, the measuring scale in the Y-axis direction may not be provided on the bracket body 600. By using a coordinate measuring machine to measure the points marked by the laser emitter 4 on the vehicle body, the same Y coordinate value of the contact point where the bumper corner measuring tooling contacts the vehicle body can also be obtained, which is the Y coordinate value of the bumper corner.
[0058] In this embodiment, when the measuring scale in the Y-axis direction is provided on the bracket body 600, the test process of the bumper corner measuring system is as follows:
[0059] First, place the measuring bracket 6 in front of the test vehicle and adjust it according to the vehicle's overall coordinate system of the test vehicle, so that the X′, Y′, and Z′ axes on the measuring bracket 6 are parallel to the X, Y, and Z axes of the vehicle's overall coordinate system. Then, install the assembled bumper corner measuring tooling on the X-axis moving arm 601 through the mounting member 102, and connect the first power supply line 303 of the switch circuit 3 and the second power supply line 401 of the laser emitter to a battery or a power adapter.
[0060] Turn on the laser emitter 4, adjust each moving arm and the sliding table of the measuring bracket 6 to align the laser beam emitted by the laser emitter 4 with the vehicle longitudinal vertical plane 7 (usually using the vehicle logo in the middle of the bumper or radar sensors, cameras, etc. as a reference), and record the value Y1 of the Y-axis sliding table 602 on the scale of the bracket body 600, which is the Y-axis coordinate of the vehicle longitudinal vertical plane 7 on the scale.
[0061] Then, adjust each moving arm and the sliding table of the measuring bracket 6 to find the part where the vertical center line of the measuring plate body 101 is tangent to the vehicle bumper. When the plate body 101 contacts the vehicle bumper, apply a slight pressure. When the status light 302 lights up, it indicates that the pressure sensor 2 contacts the bumper corner 8, and record the value Y2 of the Y-axis sliding table 602 on the scale of the bracket body 600 at this time.
[0062] Then calculate the difference between Y2 and Y1, which is the coordinate Y3 of the bumper corner 8 in the vehicle's overall coordinate system, Y3 = Y2 - Y1.
[0063] Then remove the bumper corner measuring tooling, rotate it 180° along the axis of the mounting member 102 and reinstall it, which can be used to measure the other bumper corner 8, thus completing the measurement of the bumper corner 8.
[0064] It should be noted that when there is no scale on the measuring bracket 6, the vertical center line (i.e., the first center line) of the plate body 101 can be made to be tangent to the vehicle bumper by adjusting the X-direction moving arm 601, the Y-direction slide 602 and the Z-direction slide 603 of the measuring bracket 6. Then, turn on the laser emitter 4, and a light spot will be formed on the vehicle body by the laser beam. At this time, use a three-coordinate device to measure the Y coordinate value of this light spot in the vehicle coordinate system. This value is the same as the Y coordinate value of the bumper corner 8, so that the measurement of the bumper corner 8 can also be realized.
[0065] The utility model forms a bumper corner measuring tool by installing components such as a thin-film pressure sensor, a switch circuit 3, a laser emitter 4, etc. on the plate body 101. The state lamp 302 on the switch circuit 3 is used to display whether the pressure sensor 2 arranged on the vertical center line of the plate body 101 is in contact with the vehicle front bumper. Combined with the laser emitter 4, a measuring point equivalent to the Y value of the contact point can be marked on the vehicle, realizing the function of detecting the bumper corner 8, and having the advantages of simplifying the operation process, reducing the use of consumables, reducing the subjective influence of operators, and improving the test accuracy.
[0066] The above embodiments are only preferred embodiments cited to fully illustrate the utility model, and the protection scope of the utility model is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the utility model are all within the protection scope of the utility model.
Claims
1. A bumper angle measuring tool, characterized in that: include: The plate body (101) has a first side surface and a second side surface which are arranged opposite to each other along the thickness direction thereof; A pressure sensor (2) is arranged on a first side surface of the plate body (101), and the pressure sensor (2) is arranged on a first center line on the first side surface of the plate body (101); A mounting member (102) is fixedly connected to the second side surface of the plate body (101), a center line of the mounting member (102) is obliquely intersected with the second side surface of the plate body (101), and a projection of the mounting member (102) on the plate body (101) is perpendicular to a first center line on the first side surface, and the mounting member (102) is suitable for being mounted on the measuring bracket (6) so as to move with the measuring bracket (6); A switch circuit (3) is electrically connected to the pressure sensor (2), the switch circuit (3) is adapted to be turned on when the pressure sensor (2) is pressed, and a status light (302) is provided on the switch circuit (3), and the status light (302) lights up when the switch circuit (3) is turned on; A laser emitter (4) is connected to the plate body (101) and is located on the second side of the plate body (101); the laser emitted by the laser emitter (4) is parallel to the center line of the mounting member (102) and intersects with an extension line of the first center line.
2. The bumper angle measuring tool according to claim 1, characterized in that: The bumper angle measurement tool also includes: A fixing frame (103) is fixedly connected to the plate body (101); a mounting hole (104) is provided on the fixing frame (103); a center line of the mounting hole (104) is parallel to a center line of the mounting member (102) and intersects with an extension line of the first center line; the laser emitter (4) is mounted in the mounting hole (104); and a center line of the mounting hole (104) coincides with a laser emitted by the laser emitter (4).
3. The bumper angle measuring tool according to claim 1, characterized in that: A groove (105) is provided on the first side surface of the plate body (101), the groove (105) coincides with a first center line on the first side surface of the plate body (101), and the pressure sensor (2) is installed in the groove (105).
4. The bumper angle measuring tool according to claim 3, characterized in that: The pressure sensor (2) is a thin film pressure sensor, comprising a sensing area (201) and a wiring terminal (202), wherein the sensing area (201) is located in the groove (105), the wiring terminal (202) extends out of the plate body (101), and the wiring terminal (202) is electrically connected to the switch circuit (3).
5. The bumper angle measuring tool according to claim 4, characterized in that: A comparator (304) is provided on the switch circuit (3); the thin film pressure sensor is connected to one end of the comparator (304); the other end of the comparator (304) is connected to a resistance element; the resistance of the thin film pressure sensor is suitable for decreasing when the sensing area (201) is pressed; and the switch circuit (3) is suitable for being turned on when the resistance of the thin film pressure sensor decreases to a value less than a preset resistance value of the resistance element.
6. The bumper angle measuring tool according to claim 4, characterized in that: The width of the groove (105) is equal to the width of the pressure sensor (2), and the depth of the groove (105) is equal to the thickness of the pressure sensor (2).
7. The bumper angle measuring tool according to claim 1, characterized in that: The mounting member (102) is provided with a connection hole (106), and the mounting member (102) is suitable for being connected to the measurement bracket (6) through the connection hole (106).
8. The bumper angle measuring tool according to any one of claims 1 to 7, characterized in that: The plate body (101) is a transparent plate.
9. A bumper angle measurement system, characterized in that: include: A measuring bracket (6), comprising a bracket body (600) and an X-axis movable arm (601), a Y-axis slide table (602), and a Z-axis slide table (603) movable relative to the bracket body (600); The bumper angle measuring tool according to any one of claims 1 to 8 is detachably connected to the X-axis movable arm (601).
10. The bumper angle measurement system according to claim 9, characterized in that: The support body (600) is provided with a measuring scale along the Y-axis direction to measure the position of the Y-axis slide table (602).