Testing device for speed measuring device

Abstract

The utility model provides a testing device for a speed measuring device. The testing device comprises a signal reflecting piece, a driving assembly and a supporting assembly, the signal reflecting piece is provided with a reflecting surface used for reflecting a speed measuring signal emitted by the speed measuring device back to the speed measuring device, and the driving assembly is used for driving the signal reflecting piece to move; the supporting assembly is arranged on the side, away from the reflecting face, of the signal reflecting piece and used for providing supporting force for the signal reflecting piece. The supporting assembly is provided with a first end close to the signal reflecting piece and a second end away from the signal reflecting piece, the first end is fixedly connected with the driving assembly, the second end is in sliding contact with the driving assembly, the operation stability of the signal reflecting piece can be guaranteed, and testing of the speed measuring device can be conducted smoothly.

Description

Technical Field

[0001] The embodiments of the present disclosure relate to, but are not limited to, the field of testing, and in particular, to a testing device for a speed measuring device. Background Art

[0002] A speedometer can be used to measure the speed of an object moving at high speed, such as the speed of a vehicle traveling on the road. Common speedometers include millimeter wave speedometers, ultrasonic speedometers, laser speedometers, FMCW lidars, etc. In order to determine whether there is an error in the speed measurement result of the speedometer, that is, whether it can accurately measure the speed of the vehicle, the speedometer is usually tested after it is prepared. The conventional test method is to install a speedometer on the side of the road and measure a car traveling at high speed. However, this test method is limited by the site and has safety risks.

[0003] Therefore, the related art proposes a test device, which includes a conveyor belt and a simulated target part. The simulated target part is fixed on the conveyor belt, and the conveyor belt is driven by a motor to move at high speed, so that the simulated target part can simulate the high-speed movement of the car. The simulated target part usually uses small-sized objects such as aluminum bars and spikes. They are small in size and encounter less air resistance when moving at high speed on the conveyor belt. Therefore, it only needs to be simply fixed to the conveyor belt without worrying about the simulated target part being overturned by air resistance.

[0004] However, since it is difficult to aim the invisible measurement beam (infrared laser, millimeter wave, sound wave, etc.) at the small-sized simulated target when the radar speed meter is far away from the simulated target, the test result of whether the speed meter has errors may be inaccurate. And since the measurement beam may be larger than the small-sized simulated target after being diverged over a long distance, it will further affect the test result. Therefore, the test device in the related art is only suitable for testing the speed meter at a position close to the speed meter.

[0005] For various speed meters, at least one test is required when the simulated target is at different distances, which helps improve the test accuracy. In addition, when testing FMCW lidar, since the frequency of the Doppler shift and the beat frequency signal are close, coupled with factors such as the reflected stray light of the lens, it is easy to introduce strong interference signals when measuring close-range high-speed objects, and the effect is not as stable as when testing at a long distance. This requires the simulated target to be larger in size for long-distance testing.

[0006] However, when the simulated target is large in size, the area of ​​the windward surface and the volume of the simulated target are both large, and the air resistance it encounters when moving at high speed on the conveyor belt is also relatively large. If the simulated target is directly fixed on the conveyor belt, the simulated target is easily overturned by air resistance, resulting in test interruption. Even if the simulated target is not overturned, the conveyor belt will be deformed due to the torsional force caused by air resistance, affecting the high-speed operation of the conveyor belt. Utility Model Content

[0007] The utility model aims to solve at least one of the technical problems existing in the prior art, and proposes a testing device for a speed measuring device, which can ensure the stability of the operation of a signal reflecting member, so that the speed test of the speed measuring device can be carried out smoothly.

[0008] In order to achieve the purpose of the utility model, a test device for a speed measuring device is provided, the test device includes a signal reflecting member, a driving assembly and a supporting assembly, the signal reflecting member has a reflecting surface for reflecting a speed measuring signal emitted by the speed measuring device back to the speed measuring device, the driving assembly is used to drive the signal reflecting member to move; the supporting assembly is arranged on the side of the signal reflecting member away from its reflecting surface, and is used to provide supporting force to the signal reflecting member; the supporting assembly has a first end close to the signal reflecting member and a second end away from the signal reflecting member, the first end is fixedly connected to the driving assembly, and the second end is in slidable contact with the driving assembly.

[0009] In some embodiments, the support assembly includes a first support rod and a second support rod, the signal reflecting member is arranged on the first support rod, one end of the first support rod is used as the first end fixedly connected to the driving assembly; one end of the second support rod is used as the second end to be slidably contacted with the driving assembly, and the other end of the second support rod is arranged on the first support rod.

[0010] In some embodiments, the second support rod includes a support portion and a connecting bracket, one end of the support portion is used as the second end to be slidably in contact with the drive assembly; the two ends of the connecting bracket are respectively connected to the first support rod and the support portion, and an acute angle is formed between the connecting bracket and the first support rod with an opening facing the drive assembly.

[0011] In some embodiments, the support portion includes a rod body and a rolling element, the driving assembly has a supporting surface fixedly connected to the first end and slidably in contact with the second end, the rod body extends in a direction perpendicular to the supporting surface; the rolling element is rotatably connected to the rod body and slidably in contact with the driving assembly.

[0012] In some embodiments, the second support rod further includes an elastic member, and two ends of the elastic member along the deformation direction are respectively fixedly disposed on the connecting bracket and the driving assembly to provide elastic pulling force to the connecting bracket.

[0013] In some embodiments, the first supporting rod includes a first sub-rod and a second sub-rod; one end of the first sub-rod is used as the first end fixedly connected to the driving assembly, and the other end of the first sub-rod is rotatably connected to the second sub-rod; the signal reflecting member and the connecting bracket are respectively located on both sides of the second sub-rod.

[0014] In some embodiments, the second sub-rod is fixedly connected to the connecting bracket, or the second sub-rod and the connecting bracket are integrally formed.

[0015] In some embodiments, a reinforcing rib is further provided between the second sub-rod and the connecting bracket.

[0016] In some embodiments, the driving assembly includes a driving wheel, a driven wheel, a transmission belt and a motor. The transmission belt is arranged on the outer periphery of the driving wheel and the driven wheel. The motor is used to drive the driving wheel to rotate, so as to drive the driven wheel to rotate through the transmission belt; the supporting assembly is arranged on the side of the transmission belt away from the driving wheel and the driven wheel.

[0017] In some embodiments, the drive assembly also includes at least one row of rollers, each row of rollers includes a plurality of rollers arranged in sequence along the extension of the drive belt, and each roller is in contact with the side of the drive belt facing away from the support assembly so as to be able to support the drive belt as it rotates with the movement of the drive belt.

[0018] The utility model has the following beneficial effects:

[0019] In the test device of the present application, the support assembly is used to set the signal reflector on the drive assembly, so that the signal reflector can move at a predetermined speed, and the air resistance to which the signal reflector is subjected will also be applied between the support assembly and the drive assembly. When the support assembly is set on the drive assembly, its first end is fixedly connected to the drive assembly, and its second end is slidably in contact with the drive assembly, so that when the signal reflector is subjected to wind resistance, the drive assembly is not only fixedly connected to the support assembly, but also slidably in contact with the support assembly. In the related art, the target simulation part is directly fixed on the conveyor belt. When the target simulation part is selected to be of a larger size, the conveyor belt is easily deformed by a large torsional force. However, the drive assembly of the present application can operate stably even when the signal reflector is subjected to large wind resistance. Therefore, the test device of the present application can be used normally regardless of the distance between the signal reflector and the speed measuring device.

[0020] Other objects and features of the present invention will become clear by reading the specification, claims and drawings of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 It is a front view of the testing device according to the embodiment of the present utility model.

[0023] Figure 2 It is a left view of the testing device according to the embodiment of the present utility model.

[0024] Description of main component symbols:

[0025] 20. Speed ​​measuring device;

[0026] 100. signal reflecting element; 110. reflecting surface;

[0027] 210, driving wheel; 220, driven wheel; 230, transmission belt; 240, roller;

[0028] 300a, first end; 300b, second end; 310, first supporting rod; 311, first sub-rod; 312, second sub-rod; 313, hinge; 314, fastener; 321, support portion; 3211, rod body; 3212, roller; 322, connecting bracket; 330, elastic member; 340, reinforcing rib;

[0029] 400. Bracket. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0031] In order to solve the above technical problems, the present application proposes a test device for a speed measuring device 20, which can perform normal testing at a long distance from the speed meter even if the signal reflecting member 100 is of a larger size, and can also perform normal testing at a short distance from the speed meter. The signal reflecting member 100 will not be overturned by air resistance, so that the signal reflecting member 100 can move stably during the test, avoiding abnormal interruption of the test process.

[0032] In order to better explain this embodiment, the following is described in combination with the drawings. It should be noted that the structure in the drawings is only for schematic illustration and does not specifically limit the structure in this embodiment. Other structures derived therefrom are also within the protection scope of the present utility model.

[0033] See also Figure 1 and Figure 2The test device includes a signal reflecting member 100, a driving assembly and a supporting assembly. The signal reflecting member 100 has a reflecting surface 110, and the reflecting surface 110 is used to reflect the speed measuring signal emitted by the speed measuring device 20 back to the speed measuring device 20. The speed measuring device 20 in this embodiment transmits a speed measuring signal to the signal reflecting member 100 and receives the speed measuring signal reflected back by the signal reflecting member 100, and analyzes the reflected speed measuring signal to obtain the speed of the signal reflecting member 100. The speed measuring device 20 can be a millimeter wave speed meter, an ultrasonic speed meter, a laser speed meter, an FMCW laser radar, etc. The specific implementation and structure of the speed measuring device 20 are common contents in the relevant technology, and will not be repeated here one by one.

[0034] The signal reflector 100 is used to simulate a vehicle when the test device is working, and the size of its reflective surface 110 can be relatively large so as to accurately reflect the speed measurement signal back at a position far away from the speed measurement device 20. In addition, the driving component is used to drive the signal reflector 100 to move, so that the signal reflector 100 can move at a predetermined speed in a direction close to or away from the speed measurement device, so that the signal reflector 100 can simulate a high-speed moving object such as a car.

[0035] Since the reflecting surface 110 of the signal reflecting element 100 is the windward surface, that is, the reflecting surface 110 is subject to air resistance when the signal reflecting element 100 moves at high speed, in order to enable the signal reflecting element 100 to maintain a stable state under the action of air resistance and not be overturned, the supporting assembly is arranged on the side of the signal reflecting element 100 away from its reflecting surface 110, for providing supporting force to the signal reflecting element 100 to resist air resistance.

[0036] The support assembly has a first end 300a and a second end 300b, wherein the first end 300a is close to the signal reflecting member 100, and the second end 300b is far away from the signal reflecting member 100. That is, a certain distance is between the first end 300a and the second end 300b, and the first end 300a is located between the second end 300b and the signal reflecting member 100. The first end 300a is fixedly connected to the driving assembly, and the second end 300b is in slidable contact with the driving assembly.

[0037] It is understood that the signal reflector 100 can have a reflectivity of a common object, such as a Lambertian plate with a reflectivity of 10%-90%, or can have a high reflectivity so as to effectively reflect the speed measurement signal of the speed measurement device 20. The signal reflector 100 is usually made of reflective material, such as metal with high reflective performance or specially designed reflective stickers. In addition, the signal reflector 100 has directionality so as to be able to reflect signals from various angles, ensuring that the speed measurement device can receive reflected signals at various angles.

[0038] In the embodiment of the present application, the support assembly is used to set the signal reflector 100 on the drive assembly, so that the signal reflector 100 can move at a predetermined speed, and the air resistance of the signal reflector 100 will also be applied between the support assembly and the drive assembly. When the support assembly is set on the drive assembly, its first end 300a is fixedly connected to the drive assembly, and its second end 300b is in slidable contact with the drive assembly, so that the drive assembly is not only fixedly connected to the support assembly when the signal reflector 100 is subjected to wind resistance, but also in slidable contact with the support assembly. This structure in which one end is fixed and the other end is slidable avoids the transmission belt from being deformed by excessive torsional force at a single point, and ensures the stability of high-speed operation. In the related art, the target simulation part is directly fixed on the conveyor belt. When the target simulation part is selected in a larger size, the conveyor belt is easily deformed by a large torsional force, while the drive assembly of the embodiment of the present application can operate stably even when the signal reflector 100 is selected in a larger size. Therefore, the test device of the embodiment of the present application can be used normally when the signal reflector 100 is far or near from the speed measuring device 20.

[0039] In an optional embodiment, the driving assembly includes a driving wheel 210, a driven wheel 220, a transmission belt 230 and a motor. The transmission belt 230 is arranged on the periphery of the driving wheel 210 and the driven wheel 220, and the motor is used to drive the driving wheel 210 to rotate. The driving wheel 210 drives the transmission belt 230 to move through the friction force, so as to drive the driven wheel 220 to rotate through the transmission belt 230, and the rotation of the driving wheel 210 and the driven wheel 220 provides a rotational power for the transmission belt 230. Among them, the type of motor can include an AC motor, a DC motor, etc. The support assembly is arranged on the side of the transmission belt 230 away from the driving wheel 210 and the driven wheel 220, and the transmission belt 230 is not only used to provide the support assembly with power for movement, but also can be used to support the support assembly. Among them, the radius of the driving wheel 210 and the driven wheel 220 is the same. The transmission belt 230 has two different shapes during the rotation process - a curved area and a straight area. Specifically, the curved area is located at the periphery of the driving wheel 210 and the driven wheel 220, and the straight area is located between the driving wheel 210 and the driven wheel 220. In a preferred embodiment, the size of the driving wheel 210 is relatively large, so that the surface slope of the curved area on the transmission belt 230 changes more gently. In other implementations, the driving wheel 210 and the driven wheel 220 can also be arranged in sequence using multiple pulleys with smaller radii, as long as the rotation of the transmission belt 230 can be achieved.

[0040] It is understandable that the transmission belt 230 is properly tensioned to improve the straightness of the straight area between the driving wheel 210 and the driven wheel 220 on the transmission belt 230. The side of the transmission belt 230 that is pulled and tensioned by the driving wheel 210 has better straightness and can be used as a preferred test area, that is, the speed measuring device 20 measures the speed when the signal reflecting member 100 moves with the transmission belt 230 to the upper straight area.

[0041] It is understandable that the signal reflector 100, driven by the transmission belt 230, performs a circular motion with a large turning radius, so that the movement speed of the signal reflector 100 can reach a very high level. For example, the movement speed of the transmission belt 230 can reach 20 to 50 m / s, which is comparable to the movement speed of a car. By controlling the motor speed n, the movement speed v1=2πrn of the transmission belt 230 is obtained, where r is the radius of the driving wheel 210 and the driven wheel 220. Among them, the movement speed of the signal reflector 100 in the straight area of ​​the transmission belt 230 is equal to the speed v1 of the conveyor belt. Assuming that the speed measurement result measured by the speed measuring device 20 is v2, the smaller the absolute value of the difference between v1 and v2, the smaller the error of the speed measuring device 20.

[0042] In an optional embodiment, the transmission belt 230 is generally made of materials such as rubber, PVC, PU, ​​metal mesh, etc., and the specific material selection is determined according to the test environment. The transmission belt 230 may be a single-layer or multi-layer structure, and the multi-layer structure generally includes a top layer, a skeleton layer, and a bottom layer. The top layer is used to set the support assembly, the skeleton layer provides strength and tensile resistance, and the bottom layer contacts the driving wheel 210, the driven wheel 220, and the multiple rows of rollers 240.

[0043] In the present invention, the size of the signal reflector 100 can be set larger than the size of the aluminum bar in the related art, and the larger signal reflector 100 is set on the transmission belt 230 through the support assembly. The support assembly enables the signal reflector 100 to be perpendicular to the surface of the transmission belt 230 when the transmission belt 230 passes through the straight area. Since the second end 300b of the support assembly is in sliding contact with the transmission belt 230, the second end 300b of the support assembly does not interfere with the transmission belt 230 passing through the curved area, so that the signal reflector 100 can follow the transmission belt 230 to perform high-speed rotational motion to simulate highly moving objects such as vehicles. The driving assembly can control the movement speed of the signal reflector 100 in the straight area of ​​the transmission belt 230 by controlling the motor speed and the radius of the driving wheel 210 or the driven wheel 220.

[0044] In an optional embodiment, the support assembly includes a first support rod 310 and a second support rod. The signal reflector 100 is disposed on the first support rod 310, and one end of the first support rod 310 is used as a first end 300a to be fixedly connected to the drive assembly. One end of the second support rod is used as a second end 300b to be slidably contacted with the drive assembly, and the other end of the second support rod is disposed on the first support rod 310.

[0045] In this embodiment, the first support rod 310 is used to be fixedly connected to the driving assembly, and the second support rod is used to be in slidable contact with the driving assembly. The first support rod 310 is used to set the signal reflecting member 100, and the second support rod is connected to the first support rod 310 to provide a supporting force when the signal reflecting member 100 on the first support rod 310 is subject to air resistance.

[0046] Specifically, the first support rod 310 is fixedly connected to the transmission belt 230 , and the second support rod is in slidable contact with the transmission belt 230 .

[0047] The second support rod includes a support portion 321 and a connecting bracket 322. One end of the support portion 321 is used as the second end 300b to slidably contact the drive assembly. The two ends of the connecting bracket 322 are respectively connected to the first support rod 310 and the support portion 321. The connecting bracket 322 and the first support rod 310 form an acute angle with an opening toward the drive assembly.

[0048] The support part 321 includes a rod body 3211 and a rolling element. The driving assembly has a supporting surface fixedly connected to the first end 300a and slidably contacted with the second end 300b, and the rod body 3211 is extended in a direction perpendicular to the supporting surface. The rolling element is rotatably connected to the rod body 3211 and slidably contacted with the driving assembly.

[0049] In an optional embodiment, the first support rod 310 includes a first sub-rod 311 and a second sub-rod 312. One end of the first sub-rod 311 is used as a first end 300a fixedly connected to the driving assembly, and the other end of the first sub-rod 311 is rotatably connected to the second sub-rod 312. The signal reflecting member 100 and the connecting bracket 322 are respectively located on both sides of the second sub-rod 312.

[0050] Specifically, an acute angle is formed between the connecting bracket 322 and the second sub-rod 312 with the opening facing the driving assembly, so that the connecting bracket 322 and the second sub-rod 312 together form a structure with low sides and high middle, so as to avoid bending and arching of the driving assembly during movement, and avoid hitting the transmission belt 230 that arches through the bending area.

[0051] In an optional embodiment, the first sub-rod 311 is connected to the second sub-rod 312 through a hinge 313, wherein the hinge 313 may be a pin or other structure capable of realizing the rotation of the second sub-rod 312 relative to the first sub-rod 311. The signal reflector 100 may be fixedly connected to the second sub-rod 312, so that the signal reflector 100 can rotate relative to the first sub-rod 311 along with the second sub-rod 312. It is understood that when the support assembly and the signal reflector 100 move toward or away from the speed measuring device 20 along with the movement of the transmission belt 230, the signal reflector 100 is subjected to air resistance in the opposite direction to the moving direction, and the second support rod disposed on the side of the second sub-rod 312 away from the signal reflector 100 can provide a supporting force to resist the air resistance to the second sub-rod 312 and the signal reflector 100, so as to prevent the signal reflector 100 from rotating around the hinge 313 along with the second sub-rod 312 and failing to reflect the speed measuring signal emitted by the speed measuring device 20 back to the speed measuring device 20. The relative rotation between the first sub-rod 311 and the second sub-rod 312 can prevent the air resistance of the signal reflecting member 100 from being mostly applied to the first end 300a of the first sub-rod 311 fixedly connected to the transmission belt 230, further reducing the risk of deformation of the transmission belt 230.

[0052] In an optional embodiment, one end of the first sub-rod 311 is used as the first end 300a and is fixedly connected to the driving assembly through a fastener 314, wherein the fastener 314 can be a bolt or other structure capable of achieving fastening. In a specific embodiment, the first sub-rod 311 is fixedly connected to the transmission belt 230 through the fastener 314, so that the first sub-rod 311 can move along with the rotation of the transmission belt 230. This makes the connection between the support assembly and the driving assembly firm and will not loosen or shift during the movement of the transmission belt 230.

[0053] The second support rod further includes an elastic member 330. Two ends of the elastic member 330 along the deformation direction thereof are respectively fixedly disposed on the connecting bracket 322 and the driving assembly to provide elastic pulling force to the connecting bracket 322.

[0054] It should be noted that when the test device is working, that is, when the transmission belt 230 drives the support assembly and the signal reflector 100 to move, the elastic tension provided by the elastic member 330 and the air resistance cause the signal reflector 100, the second sub-rod 312 and the connecting bracket 322 to fall backward as a whole, so that the roller 3212 at the bottom of the rod body 3211 always presses the transmission belt 230. The pressure of the roller 3212 is finally transmitted to the roller 240 through the transmission belt, so that the signal reflector 100, the second sub-rod 312 and the connecting bracket 322 will not continue to fall backward but just keep the signal reflector 100 Figure 1The vertical state (perpendicular to the transmission belt 230) in the bending area of ​​the transmission belt 230, the roller 3212 at the bottom of the rod body 3211 can roll freely on the surface of the conveyor belt, so it does not interfere with the bending and deformation of the transmission belt 230 around the driving wheel 210 or the driven wheel 220. The elastic member 330 can make the roller 3212 at the bottom of the rod body 3211 always close to the transmission belt 230, and will not be separated from the transmission belt 230 due to gravity and centrifugal movement, causing the signal reflecting member 100 to shake, ensuring that the signal reflecting member 100 can maintain a relatively stable posture and make high-speed rotational motion with the transmission belt 230, thereby improving the accuracy of the speed measuring device 20, and further improving the test accuracy of the test device. And it is prevented that the second sub-rod 312 is affected by gravity when the first support rod 310 passes through the transmission area on the transmission belt 230 and tilts forward.

[0055] In some embodiments, the second sub-rod 312 is fixedly connected to the connecting bracket 322. In other embodiments, the second sub-rod 312 and the connecting bracket 322 are integrally formed to improve the reliability of the connection between the first support rod 310 and the second support rod, so that the support assembly can provide a reliable supporting force to the signal reflecting member 100.

[0056] In an optional embodiment, the first sub-rod 311 is connected to the transmission belt 230 via a fastener 314 , wherein the fastener may be a bolt or other structure capable of achieving a fastening connection.

[0057] In some embodiments, a reinforcing rib 340 is further provided between the second sub-rod 312 and the connecting bracket 322 to ensure a secure connection between the second sub-rod 312 and the connecting bracket 322, thereby ensuring the safety of the operation of the entire testing device.

[0058] In an optional embodiment, the signal reflector 100 and the transmission belt 230 both have a certain width, and the first sub-rod 311 can be fixed to the transmission belt 230 only by a plurality of fasteners 314 located on the same straight line. Since the plurality of fasteners 314 are located on a straight line, they are overlapped from the front view. When the transmission belt 230 moves to a bending area, the plurality of fasteners 314 can be regarded as only one point when the transmission belt 230 turns, so it will not affect the bending deformation of the transmission belt 230 when it passes through the driving wheel 210 or the driven wheel 220. It should be noted that the transmission belt 230 can use an existing standard conveyor belt, such as a wide flat belt or a wide conveyor belt with multiple standard V-belts arranged side by side, which is fixed by bolts and the first sub-rod 311. Of course, in other embodiments, the drive assembly can also use a custom-made transmission belt 230, which is not specifically limited here.

[0059] In an optional embodiment, the test device further includes a control component, which is used to receive the speed measurement result obtained by the speed measuring device 20 when measuring the speed of the signal reflecting member 100, and compare the speed measurement result with the actual speed of the signal reflecting member 100, so as to determine the speed measurement error of the speed measuring device 20 according to the difference between the speed measurement result and the actual speed of the signal reflecting member 100. It can be understood that the smaller the above difference is, the smaller the error of the speed measuring device 20 is. According to the error analysis result, the calibration parameters of the speed measuring device 20 are adjusted to make its measurement result more accurate. After calibration, retest is performed to ensure that the error of the adjusted speed measuring device 20 is within an acceptable range.

[0060] In an optional embodiment, the drive assembly may further include a tensioning device, a guiding device, an emergency stop device and an anti-deviation device. The tensioning device is used to adjust the tension of the transmission belt 230 to ensure that the transmission belt 230 maintains appropriate tension during operation to prevent slipping or deviation. Such as a spiral tensioning device, a weight tensioning device, a hydraulic tensioning device, etc., are used to adjust the tension of the conveyor belt to ensure its smooth operation. Guide devices such as guide rollers and guide rails prevent the conveyor belt from deviating and ensure that the conveyor belt runs along a predetermined track. The emergency stop device is used to immediately stop the conveyor belt from running in an emergency. The anti-deviation device monitors the operation of the conveyor belt and promptly corrects the deviation of the conveyor belt.

[0061] In an optional embodiment, the driving assembly may further include a bracket 400 for setting the driving wheel 210 and the driven wheel 220 .

[0062] The drive assembly further includes at least one row of rollers 240, each row of rollers 240 includes a plurality of rollers 240 sequentially arranged along the extension of the transmission belt 230, each roller 240 is in contact with the side of the transmission belt 230 away from the support assembly, so as to support the transmission belt 230 when rotating with the movement of the transmission belt 230, so as to improve the straightness of the transmission belt 230. It can be understood that the rollers 240 support the transmission belt 230, and generally include an upper roller 240 and a lower roller 240, the upper roller 240 is used to support the support assembly and the signal reflector 100, and the lower roller 240 is used to support the unloaded portion.

[0063] In the description of the present utility model, it should be understood that the terms "length", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0064] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0065] In the description of the present utility model, unless otherwise clearly stipulated and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0066] In addition, the utility model may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity, and does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those skilled in the art can recognize the application of other processes and / or the use of other materials.

[0067] In the description of this specification, the description with reference to the terms "one embodiment", "certain embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0068] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A test device for a speed measuring device, characterized in that: The testing device comprises a signal reflecting member, a driving assembly and a supporting assembly, wherein the signal reflecting member has a reflecting surface for reflecting the speed measuring signal emitted by the speed measuring device back to the speed measuring device, and the driving assembly is used to drive the signal reflecting member to move; The support assembly is arranged on a side of the signal reflecting member away from its reflecting surface, and is used to provide a supporting force to the signal reflecting member; The support assembly has a first end close to the signal reflecting member and a second end away from the signal reflecting member, the first end is fixedly connected to the driving assembly, and the second end is slidably contacted with the driving assembly.

2. The testing device according to claim 1, characterized in that: The support assembly comprises a first support rod and a second support rod, the signal reflector is arranged on the first support rod, and one end of the first support rod is used as the first end to be fixedly connected with the driving assembly; One end of the second supporting rod is used as the second end to be slidably contacted with the driving assembly, and the other end of the second supporting rod is arranged on the first supporting rod.

3. The testing device according to claim 2, characterized in that: The second support rod comprises a support portion and a connecting bracket, one end of the support portion is used as the second end to be slidably in contact with the driving assembly; Two ends of the connecting bracket are respectively connected to the first supporting rod and the supporting portion, and an acute angle with an opening facing the driving assembly is formed between the connecting bracket and the first supporting rod.

4. The testing device according to claim 3, characterized in that: The support portion includes a rod body and a rolling element, the driving assembly has a support surface fixedly connected to the first end and slidably contacting the second end, and the rod body is extended in a direction perpendicular to the support surface; The rolling element is rotatably connected to the rod body and is in slidable contact with the driving assembly.

5. The testing device according to claim 3, characterized in that: The second support rod further comprises an elastic member, and two ends of the elastic member along the deformation direction thereof are respectively fixedly disposed on the connecting bracket and the driving assembly to provide elastic pulling force to the connecting bracket.

6. The testing device according to claim 3, characterized in that: The first support rod comprises a first sub-rod and a second sub-rod; One end of the first sub-rod is used as the first end to be fixedly connected to the driving assembly, and the other end of the first sub-rod is rotatably connected to the second sub-rod; The signal reflecting member and the connecting bracket are respectively located on two sides of the second sub-pole.

7. The testing device according to claim 6, characterized in that: The second sub-rod is fixedly connected to the connecting bracket, or the second sub-rod and the connecting bracket are integrally formed.

8. The testing device according to claim 6, characterized in that: A reinforcing rib is also provided between the second sub-rod and the connecting bracket.

9. The testing device according to claim 1, characterized in that: The driving assembly includes a driving wheel, a driven wheel, a transmission belt and a motor. The transmission belt is arranged on the outer periphery of the driving wheel and the driven wheel. The motor is used to drive the driving wheel to rotate, so as to drive the driven wheel to rotate through the transmission belt. The supporting assembly is arranged on a side of the transmission belt away from the driving wheel and the driven wheel.

10. The testing device according to claim 9, characterized in that: The drive assembly also includes at least one row of rollers, each row of rollers includes a plurality of rollers arranged in sequence along the extension of the drive belt, each roller is in contact with the side of the drive belt facing away from the support assembly so as to support the drive belt when rotating with the movement of the drive belt.

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