Since 2023, Continental has intensively issued a series of policies in the field of humanoid robots, clarifying the development blueprint of the industry, and it is expected to form a blue ocean market worth trillions in the long run.
Sensors are the key bridge between the software and hardware components of humanoid robots, and humanoid robots are equipped with a variety of sensors, including vision and force sense, to present a multi-information fusion force control execution mode.
In order to better control the motion with high precision, humanoid robots have given rise to a strong demand for multi-dimensional torque sensors. Among them, the six-dimensional force sensor can provide more comprehensive force sensing information, which can further improve the flexibility and stability of the robot.
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An overview of the six-dimensional force sensor industry
Torque sensors, also known as torque sensors, are key components capable of sensing and measuring force.
Depending on the measurement dimension, force transducers can be divided into single-dimensional load transducers, two-dimensional load transducers and multi-dimensional force transducers. Among them, the six-dimensional torque sensor can perceive the three-dimensional force component and the three-dimensional moment component in the force system, convert the force signal into an electrical signal, and measure three axial forces and three axial moments at the same time to meet the detection needs of forces in all directions.
The high-precision six-dimensional torque sensor can effectively decouple the interference between the force and the torque in all directions, making the force measurement more accurate. At the same time, it can monitor whether the torque is within the safe range, so as to effectively avoid overload damage to the sensor.
When the direction and point of application of a force change randomly in three-dimensional space, a six-dimensional force transducer becomes the measurement tool of choice.
Diagram of 1D, 3D and 6D torque sensors:
Source: Kunwei Technology
In the design of six-dimensional torque sensors, structural decoupling technology occupies a core position, accounting for a very high technical barrier. Structural decoupling technology includes elastomer structure design, patch position design and other aspects. The high-precision six-dimensional torque sensor realizes the accurate measurement of the force through its structural decoupling design and decoupling algorithm.
From the classification point of view, six-dimensional force sensors mainly include strain gauge, piezoresistive, capacitive and photoelectric types.
Strain gauge measurement technology is currently the main application. Strain gauge six-dimensional force transducer has many advantages such as stable performance, strong anti-interference ability and controllable cost, and is also the most mature mainstream solution.
The major players in the strain gauge manufacturer market include HBM of Germany, Kyowa KYOWA of Japan, and avionics measurement, a major domestic strain gauge manufacturer.
Six-dimensional force sensor competition landscape and leading combing
In the domestic six-dimensional force sensor market, foreign brands such as ATI, Bota, Kistler, etc. still have a large market share, and representative manufacturers in Japan and South Korea include Robotous, Sinto, etc.
At present, the main technical difficulties of domestic six-dimensional torque sensors are concentrated in sensitivity, crosstalk, anti-overload capacity and interdimensional coupling error.
The technical barriers of six-dimensional force sensors are high, and there are still few manufacturers with mass supply capacity. The six-dimensional force sensor market in the domestic market is highly concentrated, of which ATI (the United States) occupies an absolute leading position, and domestic brands such as Yuli Instrument, Kunwei Technology, and Blue Dot Touch Xin Jingcheng lead the domestic substitution process.
In addition, Keli Sensing, Donghua Testing, Chongqing Luban Robotics Research Institute, Haozhi Electromechanical and so on are also accelerating the layout. #机器人##人形机器人##科技##财经##减速器##传感器#
On the whole, in recent years, the number of domestic manufacturers of six-dimensional torque sensors has been increasing. In the context of the accelerated outbreak of humanoid robots, six-dimensional torque sensors, as key components, are expected to usher in high-speed development opportunities.
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