Throughout the century long development of the automotive industry, the mechanical transmission system has always been the core of vehicle control. However, with the impact of the wave of electrification and intelligence, the limitations of traditional mechanical structures are becoming increasingly prominent. Drive By Wire technology is reshaping the central nervous system of automobiles by replacing mechanical connections with electrical signals. Taking the wire controlled braking system as an example, traditional hydraulic braking requires the transmission of pedal force through mechanical linkages, while the wire controlled braking system uses an inductive position sensing chip to monitor the pedal position in real time, transmit the signal to the electronic control unit (ECU), and then drive the brake caliper by the motor.

The essence of wire control technology is to convert physical quantities into electrical signals through sensors, and then achieve precise control through controllers. As a leader in this field, Onsemi has built a full chain technology matrix from the perception layer to the execution layer, and its core products NCV77320 and NCS32100 chips have become the "digital neurons" of automotive and industrial application line control systems. This architecture not only improves response speed (from milliseconds to microseconds), but also ensures system security through redundant design.

Drive By Wire & Drive By AI， The trend of intelligent driving has made offline control technology a necessity

At the 2025 Shanghai Auto Show, wire control technology is accelerating the full domain digital chassis reconstruction and deepening of intelligent collaborative control. Line control technology is shifting from single function control to vehicle level collaboration. This global collaboration has evolved vehicle motion control from "passive response" to "active prediction" and "precise control". For example, at the Shanghai Auto Show, some new electric vehicles have greatly reduced trajectory tracking errors in icy and snowy road tests, or improved brake pressure control accuracy to ± 0.05MPa, energy recovery efficiency exceeding 35%, or can complete tire burst recognition and trajectory correction within 100ms. These are indicators that traditional mechanical execution systems are far from achieving.

Line control technology is regarded as a key technology in the software defined automotive era, representing the future development direction of intelligent driving. Its core is to eliminate mechanical connections, convert operation instructions into electrical signals, and drive the actuator through ECU. It can better support autonomous driving functions, provide more precise steering control and a more flexible driving experience.

The deeper reason why wire control technology has been accepted by a large number of manufacturers is due to the changes that have occurred at the vehicle architecture level, which is in line with the shift of automotive electronic and electrical architecture from traditional distributed ECU architecture to a more flexible physical architecture based on a central computing platform and regional controllers. The benefits of this refactoring are not only saving interior space and reducing vehicle weight, but also making line control technology an important component of software defined vehicles (SDVs), bringing comprehensive digitization and intelligence of automotive functions.

For example, Ansenmei integrates DSP cores into sensors to achieve data preprocessing and edge decision-making. The DSP of its NCV77320 chip can predict component wear in real time, extending the maintenance cycle of the steering system by 20%. This closed-loop optimization of "perception decision execution" makes the line control system the intelligent foundation of smart cars.

Digital Neuron of Line Control System Based on NCV77320 Chip

In strict line control systems, inductive position sensors rely on the principle of electromagnetic induction to build core advantages: non-contact position measurement is achieved through the printed inductance structure of the stator and rotor, providing high-precision and high reliability position and velocity feedback for the system. Its contactless design significantly reduces the number of components in traditional encoders, improves integration and anti-interference capabilities, especially suitable for extreme working conditions such as wire controlled steering, wire controlled braking, and motor servo control. Based on the technological breakthrough of non-contact inductive position sensors, Ansenmei has achieved functional innovation in automotive line control systems through high-precision detection and anti magnetic interference characteristics.

Ansenmei leverages its 20+years of expertise in designing inductive sensors to combine the reliable advantages of inductive encoders with the precision and speed typically associated with mid to high end optical encoders. CIPOS, developed in collaboration with HELLA, is an induction technology used in the wire controlled drive systems of passenger and commercial vehicles, such as accelerator pedal sensing, steering and torque sensors, as well as actuators for turbocharging and turbocharging. Inductive sensors have several key characteristics that make them an ideal choice for industrial and automotive applications, including insensitivity to almost all forms of pollution or interference, robustness against mechanical vibrations, and temperature independent eddy current effects, ensuring accuracy throughout the entire lifecycle of the system.

The NCV77320 automotive grade inductive position sensor is a single-chip inductive position sensor interface designed primarily for limited full range sensors such as pedals or valves. When combined with PCBs, it can form an accurate system for measuring angles or linear positions. NCV77320 complies with ISO26262 standard and AEC-Q100 certification, supports 360 ° full angle and linear position measurement, and can provide absolute position feedback with ± 0.15% full-scale accuracy. It integrates three interfaces: single ended analog output, SENT interface with fast/slow channels, and SPI channel that can directly connect to microcontrollers; Built in multiple fault detection circuits, a fault flag will be set when a fault is detected and can be read, which can meet the strict high-precision requirements of the wire controlled steering system. The integration level provided by NCV77320 can significantly reduce design time and the required number of external components, thereby accelerating time to market and achieving more compact and efficient designs.

Ansenmei Inductive Position Sensor Products for Industrial and Automotive Applications

Unlike traditional solutions based on magnets, Ansenmei inductance technology exhibits stronger EMC robustness in the DC domain: its structural design is naturally immune to stray magnetic field interference, effectively responding to the increasing strong DC current environment in the automotive electronics process, and providing reliable underlying sensing support for high-voltage and intelligent line control systems.

conclusion

As early as two years ago, the CIPOS technology jointly developed by Anson Mei and HELLA had delivered over 1 billion sensing sensors, and the entire industry had already proven the reliability of its technology. Today, wire control technology has entered the era of "experience reconstruction" from the stage of "functional substitution". The technology demonstration at the 2025 Shanghai Auto Show shows that global digitization and AI integration are becoming the industry's main focus. With the improvement of policy standards and the deepening of ecological coordination, the line control system will not only be the "nerve center" of vehicles, but also evolve into a carrier of intelligent cars, providing deterministic support for the physical world of software defined cars.

This is reported by Top Components, a leading supplier of electronic components in the semiconductor industry

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Name: John Chen

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