[Case Study] Measuring the steering wheel rotation angle of a car non-contactly.
Frequent "skipping" errors with optical sensors! How can we prevent interference from factors like stray reflections and dust?
At an automotive safety inspection company, the steering wheel rotation angle of vehicles was measured using optical sensors. However, due to issues such as light scattering and dust accumulation, "missed reading" errors occurred, leading to an increase in the number of tests and a significant decrease in work efficiency. There were requests for "sensors that are not affected by external disturbances" and "keeping the introduction costs as low as possible." The linear encoder system "SI-140 series" that we recommend consists of the magnetic detection head "SIE-140" and the magnetic scale "SIS-140." Installation is simply a matter of wrapping the "SI-140" around the steering axis of the vehicle. The number of measurement tests, which previously took 5 times, has been reduced to just 2, less than half. This has compressed the testing work and time, decreased "missed reading" errors, and improved testing accuracy. *For more details, please refer to the PDF document or feel free to contact us.
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【Case Summary (Partial)】 ■Trouble Cases (Requests) - We want sensors that are not affected by external disturbances. - We are looking for sensors with established "repetitions" every time. - We want to keep the introduction costs as low as possible. ■Trouble Situation and Losses - Follow-up inspection time: 18,000 seconds (300 seconds × 60 times/day) - Readjustment: 1,200 seconds (600 seconds × 2 times/day) - Loss amount: 64,000 yen/day (considering 200 yen per minute) *This is the total time for 5 workstations within the relevant factory. ■Improvement Points and Expected Customer Benefits - Adopting a compact and small-sized design allows for easy installation even in narrow spaces. - The magnetic scale "SIS-140" can be attached with double-sided tape, making installation and removal easy. - Due to non-contact detection, there is almost no wear or damage to the surface from friction or aging deterioration. ■Effects and Benefits of Improvement - Number of inspections: Average 5 times → 2 times *For more details, please refer to the PDF document or feel free to contact us.
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For more details, please refer to the PDF document or feel free to contact us.
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CAD data（16）
| Model number | overview | File |
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| SIE-141-P1 | Connector-equipped head |
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| SIE-141-P1 | Connector-equipped head |
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| SI-140PAC | Mako Major Counter Package |
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| SI-140PAC | Mako Major Counter Package |
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| SIE-140-P1 | Connector-equipped head |
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| SIE-140-P1 | Connector-equipped head |
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| EX-140 | SIE-140-P1 SIE-141-P1 extension cable |
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| EX-140 | SIE-140-P1 SIE-141-P1 extension cable |
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| SIS-140 | Magnetic scale (Mako measure) |
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| SIS-140 | Magnetic scale (Mako measure) |
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| SIE-141 | Head AB phase output line driver output |
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| SIE-141 | Head AB phase output line driver output |
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| SIE-140 | Head AB phase output transistor output |
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| SIE-140 | Head AB phase output transistor output |
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| SIS-210 | Scale Incremental |
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| SIS-210 | Scale Incremental |
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Company information
Utilizing our original technology of saturable coils, we offer a fundamentally simple magnetic detection element technology that provides high precision and long-term stability even under adverse conditions. We have received strong support from a wide range of industries, including unmanned transport carts, industrial equipment, labor-saving machines, material handling, machine tools, injection molding machines, civil engineering and construction robots, food machinery, industrial machinery, nuclear facilities, and ships. We also excel in sensors for motorsports such as F1 and Moto GP, inclinometers for construction machinery, and magnetic sensors used for ultra-high precision measurements in scientific fields. Some of our products are also used in applications like multi-story parking and golf cart guidance sensors. All of our products are developed and manufactured 100% in Japan, with over 80% of our product lineup being custom-made based on individual customer requests. We offer many custom options, including waterproof, explosion-proof, heat-resistant, water-resistant, and radiation-resistant specifications. If you have any issues related to sensing or measurement, please feel free to consult us. IoT Platform: Our sales and technical staff will fully support you, from minor customizations of existing products to proposals for new detection principles. You can also rely on us for assistance with Kaizen (continuous improvement). Our standard products come with a reassuring 3-year warranty. Location: Ina, Nagano Prefecture. Published on Ipros Monozukuri.