Method and device for detecting torsional angle, arch rise and pressure of wiper arm

Abstract

The invention discloses a method and a device for detecting a torsional angle, arch rise and a pressure of a wiper arm. A wiper arm (7) placement detection piece, a display screen (15), a torsional angle alarm lamp (8), and a pressure alarm lamp (9) are arranged on a working platform; the placement detection piece comprises a rotary installation disc (4), a pressure sensor (3), a coder (1), a connecting shaft (2), a detection block (5), an arch rise detection sensor (6), an air cylinder (10) and a wiper arm rotary positioning base (12); an air cylinder rotary pressure head (11) is arranged under the air cylinder (10), an air cylinder pushing detection photoelectric sensor (16) is arranged near the air cylinder rotary pressure head (11), the wiper arm rotary positioning base (12) is arranged on a horizontal sliding block (13), and the horizontal sliding block (13) is provided with a horizontal movement screw rod (14). The device is capable of simultaneously measuring the torsional angle, the pressure and the arch rise of the wiper arm, capable of displaying specific values of the torsional angle and the pressure, and capable of performing alarming through an indication lamp for unqualified torsional angle, pressure and arch rise.

Description

technical field [0001] The invention relates to performance detection of a wiper arm, in particular to a method and device for simultaneously detecting the torsion angle, crown height and pressure of a wiper arm. Background technique [0002] At present, the torsion angle, arch height, and pressure of the wiper arm need to be detected separately. The detection efficiency is low, and there is no error-proof device, which is easy to produce defective products. Torsion angle measurement is currently carried out with a pointer dial, which is a mechanical measurement. Its pointer rotates at different angles according to the twist angle of the wiper arm. The problem with this method is that, first, the accuracy of the dial can only reach 1°, which cannot meet the accuracy requirements of some wiper arm twist angles (for example, θ±1.2°); It is easy to cause bad products to flow out. [0003] Specifically, the prior art has the following problems: 1. The detection efficiency of ...

AI Technical Summary

Problems solved by technology

The problem with this method is that, first, the accuracy of the dial can only reach 1°, which cannot meet the accuracy requirements of some wiper arm twist angles (for example, θ±1.2°); Related, it is easy to lead to the outflow of bad products

[0003] Specifically, the existing technology has the following problems: 1. The detection efficiency of torsion angle and pressure is not high enough, and the judgment of unqualified products is not intuitive enough

2. There is no error-proof function for unqualified products with torsion angle

3. Manual compression is used to tighten the arm seat of the scraper arm, and it is easy to get tired after long-term operation

4. The operation is relatively complicated

5. It is inconvenient to take off each product after testing. Workers use their fingers to pick it off, which is labor-intensive

[0004] Chinese Patent Publication No. 202339181U Application No. 2011204406745 discloses a "wiper arm torsion angle and pressure detection device", which can only detect torsion angle and pressure, and is a mechanical detection, and the function needs to be improved

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