Composite loading device for sensor field calibration
By designing a composite loading device for sensors, the problems of large space occupation and low calibration efficiency during sensor calibration are solved, and efficient on-site calibration of force sensors and torque sensors are achieved.
Patent Information
- Application Number
- CN202420477251.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-12
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-03-12
AI Technical Summary
The prior art occupies a large amount of production line space during sensor calibration, which increases staffing and costs, and it is difficult to calibrate the force sensor and torque sensor at the same time, resulting in low calibration efficiency.
A composite loading device is designed, including a base, loading assembly, pressure bearing plate, guide column, pressure plate and fixing member. Through the cooperation of gear set, worm and worm gear, on-site calibration of force sensors and torque sensors is achieved.
The overall structure of the device is compact and easy to operate. It can calibrate the force sensor and the torque sensor at the same time, which significantly improves the calibration efficiency.
Smart Images
Figure CN222561193U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sensor calibration, in particular to a composite loading device used for on-site calibration of a sensor. Background Art
[0002] As autonomous driving technology is upgraded, vehicles will add a variety of sensors, such as force sensors and torque sensors. Currently, separate calibration sites are usually used to calibrate the above sensors.
[0003] However, the above calibration method will have the following technical problems:
[0004] First, the above calibration method will take up a lot of production line space and increase staffing and costs;
[0005] Second, it is not applicable to the simultaneous calibration of force sensors and torque sensors, resulting in low calibration efficiency. Utility Model Content
[0006] In view of the above problems in the prior art, the utility model proposes a composite loading device for on-site calibration of sensors, which can perform on-site calibration of force sensors and torque sensors, has a compact overall structure, is easy to operate and improves calibration efficiency.
[0007] Specifically, the utility model proposes a composite loading device for on-site calibration of a sensor, comprising:
[0008] Base;
[0009] A loading assembly, comprising a support frame fixed on the base, a gear set, a worm and a worm wheel are arranged on the support frame, the worm and the worm wheel cooperate, a detachable lead screw is arranged at the center of the worm wheel, and the gear set is used to transmit torque to the lead screw through the worm and the worm wheel;
[0010] A pressure plate, arranged on the base;
[0011] A guide column is arranged horizontally, one end of which is fixed to the pressure plate, and the other end of which is fixed to the support frame;
[0012] The first pressure plate and the second pressure plate are arranged on the guide column and can move along the length direction of the guide column. Fixing parts are provided on the pressure plate, the first pressure plate and the second pressure plate. The first force sensor to be calibrated is arranged between the pressure plate and the first pressure plate through the fixing part. The second force sensor for reference is arranged between the first pressure plate and the second pressure plate through the fixing part. One end of the screw rod is fixed on the fixing part of the second pressure plate. The main axes of the first force sensor and the second force sensor coincide with the axial direction of the screw rod.
[0013] According to an embodiment of the present utility model, the gear set includes a first gear and a second gear that are meshed, and the radius of the first gear is smaller than that of the second gear.
[0014] According to an embodiment of the utility model, the composite loading device further comprises a positioning screw, and one end of the screw rod is fixed to the fixing piece of the second pressing plate by the positioning screw.
[0015] According to an embodiment of the utility model, the composite loading device further includes a linear bearing, and the first pressing plate and the second pressing plate are arranged on the guide column through the linear bearing.
[0016] According to an embodiment of the utility model, the composite loading device includes four guide columns, and the first pressing plate and the second pressing plate are each arranged on the guide columns through four linear bearings.
[0017] According to an embodiment of the utility model, the composite loading device further comprises a first hand wheel, which cooperates with the first gear, and the first hand wheel is rotated to apply a torque to the first gear.
[0018] According to one embodiment of the utility model, the composite loading device also includes a torque coupling, forming a torque output end of the worm gear on the support frame, a first torque sensor to be calibrated is fixed to the second pressure plate, one end of a second torque sensor for reference is coupled to the first torque sensor, and the other end of the second torque sensor is connected to the torque output end through the torque coupling.
[0019] According to an embodiment of the present invention, the composite loading device further comprises a tray, and the tray is used to keep the axis of the second torque sensor aligned with the axis of the first torque sensor.
[0020] According to an embodiment of the utility model, the height of the tray is adjustable and can be moved along the length direction of the guide column.
[0021] According to an embodiment of the utility model, the composite loading device further comprises a second hand wheel, which cooperates with the screw rod, and the second hand wheel is rotated to install or remove the screw rod from the worm gear.
[0022] The utility model provides a composite loading device for on-site calibration of sensors, which can perform on-site calibration on force sensors and torque sensors, has a compact overall structure, is easy to operate and improves calibration efficiency.
[0023] It should be understood that the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the present invention as claimed. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] The accompanying drawings are included to provide a further understanding of the present invention, and they are included and constitute a part of this application. The accompanying drawings illustrate embodiments of the present invention and together with this specification serve to explain the principles of the present invention. In the accompanying drawings:
[0025] Figure 1 The structure diagram of the composite loading device of one embodiment of the utility model is shown. Figure 1 .
[0026] Figure 2 A schematic structural diagram of a loading assembly of a composite loading device according to an embodiment of the utility model is shown.
[0027] Figure 3 yes Figure 2 Right side cross-sectional view.
[0028] Figure 4 The structure diagram of the composite loading device of one embodiment of the utility model is shown. Figure 2 .
[0029] The above drawings include the following reference numerals:
[0030] Composite loading device 100
[0031] Base 101
[0032] Loading Components 102
[0033] Pressure plate 103
[0034] Guide column 104
[0035] First pressing plate 105
[0036] Second pressing plate 106
[0037] Support frame 107
[0038] Gear set 108
[0039] Worm 109
[0040] Worm gear 110
[0041] First force sensor 111
[0042] Second force sensor 112
[0043] First gear 113
[0044] The second gear 114
[0045] Set screw 115
[0046] Linear bearing 116
[0047] First hand wheel 117
[0048] Torque coupling 118
[0049] Tray 119
[0050] Second hand wheel 120
[0051] Screw 121
[0052] Fixing parts 122
[0053] Input shaft 123
[0054] Torque output 124
[0055] First torque sensor 125
[0056] Second torque sensor 126 DETAILED DESCRIPTION
[0057] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.
[0058] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.
[0059] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.
[0060] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.
[0061] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.
[0062] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.
[0063] In addition, it should be noted that the use of words such as "first" and "second" to define components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above words have no special meaning and cannot be understood as limiting the scope of protection of this application. In addition, although the terms used in this application are selected from well-known and commonly used terms, some terms mentioned in the specification of this application may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description of this article. In addition, it is required to understand this application not only by the actual terms used, but also by the meaning implied by each term.
[0064] Figure 1 A schematic structural diagram of a composite loading device according to an embodiment of the utility model is shown. Figure 2 A schematic structural diagram of a loading assembly of a composite loading device according to an embodiment of the utility model is shown. Figure 3 yes Figure 2 As shown in the figure, a composite loading device 100 for on-site calibration of a sensor mainly includes a base 101, a loading assembly 102, a pressure plate 103, a guide column 104, a first pressure plate 105 and a second pressure plate 106.
[0065] The loading assembly 102 includes a support frame 107 fixed on the base 101. Figure 2 and Figure 3 , a gear set 108, a worm 109 and a worm wheel 110 are provided on the support frame 107. The worm 109 and the worm wheel 110 cooperate, and the gear set 108 drives the worm 109 to rotate, thereby driving the worm wheel 110 to rotate. Conventionally, the worm wheel 110 is a disc with a spiral tooth shape, and the worm 109 is a cylinder with worm teeth. The purpose of transmitting motion and power is achieved through the meshing cooperation of the worm wheel 110 and the worm 109. A detachable screw 121 is provided at the center of the worm wheel 110, and the internal thread at the center of the worm wheel 110 is tightly matched with the thread of the screw 121. The gear set 108 is used to load and transmit the torque M to the screw 121 through the worm 109 and the worm wheel 110, so as to realize the function of decelerating and amplifying the loading value.
[0066] The pressure plate 103 is disposed on the base 101. The pressure plate 103 and the support frame 107 are substantially perpendicular to the bottom plate and are parallel to each other.
[0067] The guide column 104 is arranged horizontally. One end of the guide column 104 is fixed on the pressure plate 103 , and the other end is fixed on the support frame 107 .
[0068] The first pressing plate 105 and the second pressing plate 106 are arranged on the guide column 104 and can move along the length direction of the guide column 104. A fixing member 122 is arranged on the pressure plate 103, the first pressing plate 105 and the second pressing plate 106. The first force sensor 111 to be calibrated is arranged between the pressure plate 103 and the first pressing plate 105 through the fixing member 122. The second force sensor 112 for reference is arranged between the first pressing plate 105 and the second pressing plate 106 through the fixing member 122. One end of the screw rod 121 is fixed to the fixing member 122 of the second pressing plate 106. The main axis of the first force sensor 111 and the second force sensor 112 coincides with the axis direction of the screw rod 121.
[0069] The composite loading device 100 in this embodiment is suitable for on-site calibration of force sensors. The torque M is loaded through the gear set 108, and the torque is transmitted to the worm gear 110 which is relatively fixed in position. The radial force value amplification loading of the screw rod 121 can be realized by rotating the worm gear 110. The axes of the first force sensor 111, the second force sensor 112 and the screw rod 121 are aligned to reduce the influence of the tilt load and the eccentric load during the torque loading, so as to realize the accurate calibration of the first force sensor 111.
[0070] Preferably, reference Figure 2 The gear set 108 includes a first gear 113 and a second gear 114 that are meshed. The radius of the first gear 113 is smaller than that of the second gear 114. The torque is amplified and output to the worm 109 by the radius difference between the first gear 113 and the second gear 114.
[0071] Preferably, reference Figure 1 The composite loading device 100 further includes a positioning screw 115. During assembly, one end of the screw rod 121 is fixed to the fixing member 122 of the second pressing plate 106 by the positioning screw 115 to prevent the screw rod 121 from rotating when the moment is loaded.
[0072] Preferably, the composite loading device 100 further includes a linear bearing 116. The first pressing plate 105 and the second pressing plate 106 are arranged on the guide column 104 through the linear bearing 116, and can realize movement on the guide column 104. When the axes of the first force sensor 111, the second force sensor 112 and the screw rod 121 are aligned, the linear bearing 116 can further reduce the influence of the tilt load and the eccentric load during the moment loading, and improve the calibration accuracy.
[0073] Preferably, the composite loading device 100 includes four guide columns 104. The first pressing plate 105 and the second pressing plate 106 are respectively arranged on the guide columns 104 through four linear bearings 116. The first pressing plate 105 and the second pressing plate 106 are ensured to remain parallel to the pressure plate 103, and to move smoothly along the guide columns 104 under force, so that the first force sensor 111, the second force sensor 112 and the screw rod 121 are kept in the center of the axis.
[0074] Preferably, the composite loading device 100 further includes a first hand wheel 117 . The first hand wheel 117 cooperates with the input shaft 123 of the first gear 113 , and the first hand wheel 117 is rotated to apply a torque M to the first gear 113 .
[0075] Figure 4 The structure diagram of the composite loading device of one embodiment of the utility model is shown. Figure 2 As shown in the figure, the composite loading device 100 provided in this embodiment is suitable for on-site calibration of the torque sensor. The composite loading device 100 also includes a torque coupling 118. It should be noted that when calibrating the torque sensor, the screw rod 121 is not required, and the screw rod 121 is removed from the worm gear 110. Figure 3 As shown, a torque output end 124 of the worm wheel 110 is formed on the support frame 107. A first torque sensor 125 to be calibrated is fixed to the second pressure plate 106. One end of a second torque sensor 126 for reference is coupled to the first torque sensor 125, and the other end of the second torque sensor is connected to the torque output end 124 through a torque coupling 118, so that the axes of the first torque sensor 125, the second torque sensor 126 and the center of the worm wheel 110 coincide.
[0076] The on-site calibration of the torque sensor is to load the rotational torque through the gear set 108, transmit and amplify it to the worm gear 110, and load the torque to the second torque sensor 126 through the torque coupling 118 through the torque output terminal 124, thereby achieving accurate calibration of the first torque sensor 125.
[0077] Preferably, the composite loading device 100 further includes a tray 119. The tray 119 is disposed on the guide column 104. The tray 119 is used to keep the axis of the second torque sensor 126 and the first torque sensor 125 aligned to reduce the influence of parasitic components such as bending moment and lateral force. More preferably, the height of the tray 119 is adjustable and can move along the length direction of the guide column 104.
[0078] Preferably, reference Figure 1The composite loading device 100 further includes a second hand wheel 120. The second hand wheel 120 cooperates with the screw rod 121, and the second hand wheel 120 is rotated to install or remove the screw rod 121 from the worm gear 110, so that the composite loading device 100 can be conveniently used for on-site calibration of two sensors.
[0079] The composite loading device for on-site calibration of sensors provided by the utility model has the following advantages:
[0080] 1. Capable of on-site calibration of force sensors and torque sensors;
[0081] 2. The overall structure is compact, easy to install, and can switch freely between the calibration modes of the two sensors;
[0082] 3. Easy to operate, improving the efficiency of on-site sensor calibration.
[0083] It will be apparent to those skilled in the art that various modifications and variations can be made to the above exemplary embodiments of the present invention without departing from the spirit and scope of the present invention. Therefore, it is intended that the present invention covers modifications and variations of the present invention that fall within the scope of the appended claims and their equivalent technical solutions.
Claims
1. A composite loading device for on-site calibration of a sensor, characterized in that: include, Base; A loading assembly, comprising a support frame fixed on the base, a gear set, a worm and a worm wheel are arranged on the support frame, the worm and the worm wheel cooperate, a detachable lead screw is arranged at the center of the worm wheel, and the gear set is used to transmit torque to the lead screw through the worm and the worm wheel; A pressure plate, arranged on the base; A guide column is arranged horizontally, one end of which is fixed to the pressure plate, and the other end of which is fixed to the support frame; The first pressure plate and the second pressure plate are arranged on the guide column and can move along the length direction of the guide column. Fixing parts are provided on the pressure plate, the first pressure plate and the second pressure plate. The first force sensor to be calibrated is arranged between the pressure plate and the first pressure plate through the fixing part. The second force sensor for reference is arranged between the first pressure plate and the second pressure plate through the fixing part. One end of the screw rod is fixed on the fixing part of the second pressure plate. The main axes of the first force sensor and the second force sensor coincide with the axial direction of the screw rod.
2. The composite loading device according to claim 1, characterized in that: The gear set includes a first gear and a second gear that are meshed, and the radius of the first gear is smaller than that of the second gear.
3. The composite loading device according to claim 1, characterized in that: It also includes a positioning screw, through which one end of the screw rod is fixed to the fixing piece of the second pressing plate.
4. The composite loading device according to claim 1, characterized in that: It also includes a linear bearing, and the first pressing plate and the second pressing plate are arranged on the guide column through the linear bearing.
5. The composite loading device according to claim 4, characterized in that: It comprises four guide columns, and the first pressing plate and the second pressing plate are respectively arranged on the guide columns through four linear bearings.
6. The composite loading device according to claim 2, characterized in that: It also includes a first hand wheel, which cooperates with the first gear, and the first hand wheel is rotated to apply torque to the first gear.
7. The composite loading device according to claim 1, characterized in that: It also includes a torque coupling member, forming a torque output end of the worm gear on the support frame, a first torque sensor to be calibrated is fixed to the second pressure plate, one end of a second torque sensor for reference is coupled to the first torque sensor, and the other end of the second torque sensor is connected to the torque output end through the torque coupling member.
8. The composite loading device according to claim 7, characterized in that: The invention also includes a tray, which is arranged on the guide column and is used to keep the axis of the second torque sensor aligned with the axis of the first torque sensor.
9. The composite loading device according to claim 8, characterized in that: The height of the tray is adjustable and can move along the length direction of the guide column.
10. The composite loading device according to claim 1, characterized in that: It also includes a second hand wheel, which cooperates with the screw rod. The second hand wheel is rotated to install or remove the screw rod from the worm gear.