Low cost absolute encoder

By simplifying sensor design and optimizing circuitry, combined with the main control chip algorithm, the problems of high cost and installation limitations of traditional absolute encoders have been solved, achieving low-cost and high-efficiency position detection, suitable for low-to-mid-end markets and automated production.

CN224517798UActive Publication Date: 2026-07-17SHENYANG SHENGKE ZHURONG TECHNOLOGY CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SHENYANG SHENGKE ZHURONG TECHNOLOGY CO LTD
Filing Date
2025-04-11
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Traditional absolute encoders are expensive, making them difficult to popularize in the low-end and mid-range markets and large-scale application scenarios. Furthermore, their installation methods restrict motor movement, making it difficult to meet the needs of modular and integrated production.

Method used

By employing an adapter board, detection board, subdivision IC-TW29, incremental code channel, STM32L432KBU6TR main control chip, incremental module, ISL3177EIBZ-T differential chip, and detection trigger circuit, and through reasonable circuit design and main control chip algorithm, the use of the sensor is simplified, and the signal resolution and position detection accuracy are improved.

Benefits of technology

Reduce hardware costs, simplify production processes, improve equipment performance and ease of installation and commissioning, meet the needs of modular and integrated production, and adapt to the digital development of automated production and logistics industries.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN224517798U_ABST
    Figure CN224517798U_ABST
Patent Text Reader

Abstract

The utility model relates to a kind of low-cost absolute encoder, comprising: adapter plate, detection plate, subdivider IC-TW29, incremental code channel, main control chip STM32L432KBU6TR, incremental module, ISL3177EIBZ-T differential chip and detection trigger circuit;The adapter plate is used for FPC to change needle, provides test function;The detection plate is connected with subdivider IC-TW29 and uses, the phase 90 ° of the positive sine signal of incremental code channel output is subdivided output AB signal by IC-TW29, to increase resolution.Compared with prior art, its structure and design are simplified in cost, reduce hardware, production and maintenance cost;Installation is more flexible, not limit motor movement and magnetism grid adjustment is convenient;Function meets modularization demand, adapt to industry digitalization trend, with higher practical value and market prospect.
Need to check novelty before this filing date? Find Prior Art

Claims

1. A low cost absolute encoder characterized in that include: Adapter board, detection board, subdivision IC-TW29, incremental code track, main control chip STM32L432KBU6TR, incremental module, ISL3177EIBZ-T differential chip and detection trigger circuit; The adapter board is used for FPC to pin headers and provides testing functionality; The detection board is connected to the subdivision IC-TW29. The sine and cosine signals with a phase of 90° output from the incremental code channel are subdivided by the IC-TW29 to output AB signals, thereby increasing the resolution.

2. The low-cost absolute encoder according to claim 1, characterized in that The detection board includes a detection trigger circuit and an absolute position detection circuit. The detection trigger circuit is used to detect whether there is a signal input, and the absolute position detection circuit is used to collect the magnetic field signal of the changing magnetic field generated when the encoder passes by.

3. The low cost absolute encoder of claim 1, wherein: The detection board also includes a power supply circuit with a power conversion efficiency of over 90% and an interface circuit.

4. The low cost absolute encoder of claim 2, wherein, The detection trigger circuit includes a DRV5013AGQDBZR Hall sensor, a first resistor, a second resistor, a third resistor, a fourth resistor, a tenth capacitor, a twelfth capacitor, a fourteenth capacitor, and a sixteenth capacitor, all connected to the eighteenth pin of the main control chip STM32L432KBU6TR. The Hall sensor is also grounded through the third pin via a 100nF capacitor, and connected to the power supply through the first pin, the second pin, the second resistor, and an AMS1117-3.3V Zener diode.

5. The low cost absolute encoder of claim 2, wherein, It also includes a subdivision chip circuit and a 16KB EEPROM memory, wherein the subdivision chip circuit includes an IC-TW29 chip and a memory; The output of the absolute position detection circuit is connected to the input of the IC-TW29 chip. The IC-TW29 chip supports 16x subdivision, is powered by 3.3V, and its output is connected to the STM32L432KBU6TR main control chip circuit. The 16KB EEPROM memory configures and stores the relevant parameters of the IC-TW29 chip through the SPI interface.

6. The low cost absolute encoder of claim 1, wherein: The incremental module is a VCP1615 linear position sensor, which is grounded through its fourth pin and connected to the power supply through a 10μF filter capacitor connected in parallel through its first and fifth pins.

7. The low cost absolute encoder of claim 1, wherein The ISL3177EIBZ-T differential chip supports a 10MHz clock and has a built-in common-mode choke. It differentially divides the input AB signal into a BiSS signal and outputs it through the 1.25mm header of the connector.

8. The low cost absolute encoder of claim 5, wherein, The main control chip STM32L432KBU6TR circuit includes an STM32L432KBU6TR chip, a power supply filter circuit, a status indicator circuit, a low-level active reset circuit that lasts for 10ms, a download interface circuit, a 4MHz default system clock source circuit, and a decoupling capacitor circuit consisting of four 100nF ceramic capacitors.