阅读说明：本技术 一种柔性地面仿形检测传感器、收获机及方法 (Flexible ground profiling detection sensor, harvester and method ) 是由 李青龙 闫鹏 于 2020-03-25 设计创作，主要内容包括：本发明涉及一种柔性地面仿形检测传感器、收获机及方法,包括由柔性材料制成的仿形件,所述仿形件的一端能够与收获机的收获台固定连接,另一端能够与地面接触,所述仿形件包括柔性部和刚性部,所述刚性部两侧端面设置有刚性件,所述柔性部内部设置有弯曲压力应变片,本发明的传感器避免了碰撞损坏,且信号受干扰小,检测结果准确。(The invention relates to a flexible ground profile modeling detection sensor, a harvester and a method, wherein the flexible ground profile modeling detection sensor comprises a profile modeling piece made of flexible materials, one end of the profile modeling piece can be fixedly connected with a harvesting platform of the harvester, the other end of the profile modeling piece can be contacted with the ground, the profile modeling piece comprises a flexible part and a rigid part, rigid parts are arranged on the end surfaces of two sides of the rigid part, and a bending pressure strain gauge is arranged in the flexible part.)

1. The utility model provides a flexible ground profile modeling detection sensor, its characterized in that includes the profile element of being made by flexible material, the one end of profile element can with the results platform fixed connection of harvester, the other end can with ground contact, the profile element includes flexible portion and rigidity portion, rigidity portion both sides terminal surface is provided with the rigidity piece, the inside bending pressure foil gage that is provided with of flexible portion.

2. A flexible ground profile detection sensor as claimed in claim 1 wherein the profile has a mounting socket secured to an end of the profile, the profile being capable of being fixedly connected to the harvesting platform of the harvester by the mounting socket.

3. The flexible ground profile modeling sensor of claim 1, wherein the bottom surface of the rigid portion is a circular arc surface and the top surface is a flat surface, the rigid portion is capable of contacting the ground through the circular arc surface, and in a cross section perpendicular to the top surface and the bottom surface of the rigid portion, the center of the circular arc line projected from the bottom surface is located on the straight line projected from the top surface.

4. The flexible ground profiling detecting sensor according to claim 1, wherein the flexible portion is an arc-shaped structure, and a projecting direction of the arc-shaped structure is used to be disposed toward the ground.

5. The flexible ground profile detection sensor of claim 1, wherein the rigid member is a rigid plate having a shape matching a lateral shape of the rigid portion, and the rigid plate is fixedly connected to the rigid portion by a fastener.

6. A flexible ground profiling detecting sensor according to claim 5 wherein the rigid plate is a metal plate.

7. The flexible ground profiling detecting sensor according to claim 1, wherein the bending pressure strain gauge is connected with the controller, and the resistance value of the bending pressure strain gauge can be transmitted to the controller.

8. A flexible ground profiling detection sensor according to claim 1 wherein the profile is made of rubber or polyurethane elastomer.

9. A harvester, characterized in that a flexible ground profile detection sensor according to any one of claims 1-8 is mounted, which is fixedly connected to the harvesting platform of the harvester.

10. The working method of the harvester according to any one of claims 9, wherein the flexible ground profile detection sensor moves along with the harvester when the distance between the harvesting platform and the ground changes, the rigid part drives the flexible part to bend, the resistance value of the bending pressure strain gauge changes, the change of the distance between the harvesting platform and the ground is analyzed through the change of the resistance value, and the harvester adjusts the lifting of the harvesting platform according to the collected distance change.

Technical Field

The invention relates to the technical field of sensors, in particular to a flexible ground profile modeling detection sensor, a harvester and a method.

Background

The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.

The harvester is one of the main factors influencing the operation quality when in field operation, the harvesting platform is too high from the ground to cause the missing harvest, the too low cutting knife is damaged when in harvesting crops, and the like. At present, the detection means that this technique mainly relied on at present is mostly rigid contact detection, through at the harvester bench front end installation angle sensor, and the angle sensor rotation axis is connected with rigid metal or nylon profile plate, and profile plate and ground contact when ground and harvester bench distance change, profile plate ground end can rotate around the angle sensor rotation axis, calculates the rotation angle of angle sensor output through the trigonometric function, can draw the harvester bench apart from the height of ground. The inventor finds that the angle sensor is very sensitive, and the rigid profiling component is easy to generate vibration and bounce when walking close to the ground, so that the ground height detected and calculated is easy to be interfered and inaccurate, and finally, the control system controls the lifting action of the harvesting platform to be unstable. In addition, the rigid profile plate collides with a rigid body such as a stone block, which easily causes damage to the profile plate and the angle sensor.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a flexible ground profile modeling detection sensor which can effectively detect the height between a harvesting platform and the ground of a harvester, avoid the damage of the sensor and reduce the signal interference.

In order to achieve the purpose, the invention adopts the following technical scheme:

in a first aspect, an embodiment of the present invention provides a flexible ground profile detection sensor, including a profile made of a flexible material, one end of the profile being capable of being fixedly connected to a harvesting platform of a harvester, and the other end of the profile being capable of being in contact with the ground, the profile including a flexible portion and a rigid portion, the rigid portion being provided with a rigid member on two side end surfaces, and a bending pressure strain gauge being provided inside the flexible portion.

In a second aspect, embodiments of the invention provide a harvester equipped with a flexible ground profile detection sensor as described.

In a third aspect, an embodiment of the present invention provides a working method of a harvester, in a process that a flexible ground profile detection sensor moves along with the harvester, when a distance between a harvesting platform and the ground changes, a rigid portion moves, the rigid portion drives the flexible portion to bend, a resistance value of a bending pressure strain gauge changes, a change of the distance between the harvesting platform and the ground is analyzed through the change of the resistance value, and the harvester performs lifting adjustment of the harvesting platform according to the collected distance change.

The invention has the beneficial effects that:

1. the rigid part of the profile-modeling piece is formed by arranging rigid pieces on two side surfaces of a flexible material, the flexible material is in contact with the ground, collision damage is not easily caused when the flexible material collides with rigid bodies such as stones on the ground, and the service life is long.

2. The profiling rigid part is formed by arranging rigid parts on two side surfaces of a flexible material, the flexible material is in contact with the ground, the vibration and bounce generated when the harvester runs on the ground are small, and the sensitivity of the bending pressure strain gauge is much smaller than that of an angle sensor, so that the detection is not easily interfered, the detection result is accurate, and the stability and the adaptability of the lifting of the lifter of the harvester are improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

FIG. 1 is a front view of the overall structure of embodiment 1 of the present invention;

FIG. 2 is a plan view of the whole structure of embodiment 1 of the present invention;

FIG. 3 is a schematic diagram of the detection principle of embodiment 3 of the present invention;

the bending stress strain gauge comprises a fixing portion 1, a fixing portion 1-1, a top surface of the fixing portion, a flexible portion 2, a rigid portion 3, an arc surface 3-1, a plane 3-2, a mounting seat 4, a metal plate 5, a rivet 6 and a bending stress strain gauge 7.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

For convenience of description, the words "up", "down", "left" and "right" in the present invention, if any, merely indicate correspondence with up, down, left and right directions of the drawings themselves, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, rather than indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

As described in the background art, in the technology of automatically controlling the profiling height of the harvesting platform of the existing harvester to assist driving, the sensor is easily damaged, and the signal is easily interfered, so that the lifting action of the lifting platform is unstable.

In an exemplary embodiment of the present application, as shown in fig. 1-2, a flexible ground profile detection sensor includes a profile made of a flexible material, in this embodiment, the profile is made of a rubber material, and in other embodiments, the profile is made of a polyurethane elastomer or other flexible materials, which can be selected according to actual needs.

The profile comprises a fixed part 1, a flexible part 2 and a rigid part 3 which are integrally arranged, wherein a bending pressure strain gauge 7 is arranged in the flexible part, the bending pressure strain gauge can be an existing element, and the specific structure of the bending pressure strain gauge is not described in detail.

The fixed part is connected with the mounting seat 4, and the profiling piece can be through the results platform fixed connection of mounting seat and harvester, the mounting seat adopts metal side pipe, metal side pipe box is in the fixed part periphery to through rivet and fixed part fixed connection, metal side steel can with the results platform fixed connection of harvester. The fixed part is conveniently taken out from metal square pipe, conveniently maintains and changes the profile element.

In other embodiments, the cam is not provided with a fixing portion, the end of the flexible portion is connected with a fixing plate or a fixing block through a screw or other fastening members, the fixing plate or the fixing block can be fixedly connected with a harvesting platform of the harvester, and the cam can be fixedly connected with the harvesting platform in other forms, which will not be described in detail herein.

The two sides of the rigid part are provided with rigid parts, the rigid parts are rigid plates matched with the side shapes of the rigid parts, the rigid plates are metal plates 5, the metal plates are fixedly connected with the rigid part through fasteners, the fasteners are rivets 6, and bolts or screws and the like can also be adopted.

The rigid part is arranged, on one hand, the effect of preventing the profile part from being abraded can be achieved, and the effect of increasing the rigidity of the rigid part is also achieved.

The bottom surface of the rigid part is an arc surface 3-1, the top surface of the rigid part is a plane 3-2, the top surface of the rigid part and the top surface 1-1 of the fixing part are located on the same plane, the rigid part can be in contact with the ground through the arc surface, the rigid part is perpendicular to the cross section of the top surface and the bottom surface of the rigid part, and the circle center of a projection arc line of the bottom surface is located on a projection straight line of the top surface.

The rigid part is contacted with the ground through the arc surface, and the smooth running of the attached ground can be ensured. The cutting rigid part is made of rubber, so that the collision damage of rigid bodies such as ground stones is avoided, the generated vibration bounce is small when the harvester is attached to the ground to walk, the generated vibration bounce cannot be identified by the sensitivity of the bending pressure strain gauge, the interference of detection signals is reduced, the accuracy of detection results is improved, and the stability and the adaptability of the lifting adjustment of the harvesting table are ensured.

The flexible portion adopts the arc structure, and the protruding orientation of arc structure is used for setting towards ground, adopts this kind of setting to be favorable to the flexible portion kickup, and prevents that the flexible portion from because of gravity kickdown.

The bending pressure strain gauge in the flexible portion is connected with the controller and can transmit the resistance value to the controller.