Flexible joint angle sensor

A technology of angle sensors and flexible joints, which is applied in the direction of instruments and measuring devices, can solve problems such as limited application environment, complex system, and large detection error, and achieve the effects of high measurement accuracy, wide application fields, and simple and compact structure

Active Publication Date: 2013-09-18
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems that the existing methods of measuring human body posture usually adopt inertial sensor detection and video detection. These two methods have the problems of complex system, large detection error and limited application environment, and provide a flexible joint angle sensor

Method used

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Experimental program
Comparison scheme
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specific Embodiment approach 1

[0008] Specific implementation mode one: combine Figure 1 to Figure 6 Describe this embodiment. This embodiment includes a flexible bellows 1, an upper fixing block 4, a fixing ring 5, a lower fixing block 6, a displacement sensor 7, three steel wires 3 and several steel wire sliding tracks 2, and the flexible bellows 1 The upper end is connected with the fixed ring 5, and the lower end of the flexible bellows 1 is connected with the lower fixed block 6. Three steel wire sliding tracks 2 are evenly distributed along the circumference of each peak on the outer surface of the flexible bellows 1, and the surface of the flexible bellows 1 is along the The several steel wire slide rails 2 in the direction of the busbar are set facing up and down, the fixed ring 5 is a hollow structure, the center of the upper end surface of the fixed ring 5 is provided with a central hole 11, and the lower end surface of the fixed ring 5 is provided with three upper through holes 8 , the lower fix...

specific Embodiment approach 2

[0009] Specific implementation mode two: combination figure 2 To describe this embodiment, the three upper through holes 8 on the fixing ring 5 of this embodiment are uniformly distributed along the circumference. Design like this to make three steel wires 3 stressed evenly. Other components and connections are the same as those in the first embodiment.

specific Embodiment approach 3

[0010] Specific implementation mode three: combination image 3 , Figure 4 , Figure 5 , Figure 6 To describe this embodiment, the three lower through-holes 9 and the three upper through-holes 8 of this embodiment are arranged to face each other one by one. This design is convenient for the steel wires 3 to pass through, so that the three steel wires 3 are evenly stressed. Other components and connections are the same as those in the second embodiment.

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Abstract

The invention discloses a flexible joint angle sensor, and relates to a joint angle sensor. The flexible joint angle sensor is used for solving the problem of high detection errors of an inertia sensor detection method and a video detection method which are used as human posture measuring means at present. The flexible joint angle sensor is characterized in that the upper end of a flexible corrugated pipe is connected with a fixing ring, the lower end of the flexible corrugated pipe is connected with a lower fixing block, three steel wire sliding tracks are circumferentially and uniformly distributed at each crest on the flexible corrugated pipe, the multiple steel wire sliding tracks which are arranged along the direction of a generating line of the surface of the flexible corrugated pipe are vertically opposite to one another, the fixing ring is of a hollow structure, a center hole is formed in the center of the upper end surface of the fixing ring, three upper through holes are formed in the lower end surface of the fixing ring, three lower through holes are formed in the lower fixing block, a steel wire harness comprising three steel wires is arranged in the center hole, the upper end of the steel wire harness penetrates an upper fixing block, and the lower ends of the three steel wires respectively penetrate the three upper through holes, pass through each three corresponding steel wire sliding tracks, respectively penetrate the three lower through holes and then are connected with displacement sensors. The flexible joint angle sensor is used for measuring postures of organisms.

Description

technical field [0001] The invention relates to an attitude detection sensor, in particular to a flexible joint angle sensor. Background technique [0002] The existing methods of measuring human body posture usually adopt the methods of inertial sensor detection and video detection. Inertial devices all use several acceleration sensors and gyroscopes to measure joint angles, and the measurement system and data processing are relatively complicated. Its long-term detection will cause large cumulative errors and reduce measurement accuracy; it is not suitable for attitude detection in dynamic environments (such as driving cars, airplanes), and any dynamic changes in the external environment will cause obvious parameter distortion and are not applicable Measured at rest. This method is mainly aimed at short-term continuous motion measurement in a static environment. At this stage, the accuracy of anthropometric measurements is about 2-3 degrees. The 3D motion data captured b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/22
Inventor 全威王华张瞫刘昕
Owner HARBIN INST OF TECH
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