Intelligent double-electric multi-turn angular displacement sensor

Abstract

The application discloses a multi-turn angular displacement sensor based on intelligent double-electric technology, and aims to solve the defects of complex structure, high cost, large size, short service life and the like caused by the gear set structure of a traditional multi-turn angular displacement sensor. The sensor discards the gear set structure and mainly comprises a structure body, a rotating shaft, a radial magnetization magnet and a circuit board, the circuit board is integrated with core components such as an intelligent power supply unit, seamless switching of an external power supply and a backup battery and battery charging functions can be realized, and a wireless interaction unit is configured to realize wireless data transmission and remote management and control. The application simplifies the structure, reduces the cost, guarantees stable power supply and complete data, is suitable for small-sized and intelligent application scenarios, and can be widely applied to the fields of military industry, high-precision industry and the like.

Description

Technical Field

[0001] This invention relates to angular displacement sensors, and more particularly to a multi-turn angular displacement sensor based on intelligent dual-electric technology. Background Technology

[0002] In the field of high-precision angle measurement, traditional multi-turn angular displacement sensors generally adopt a gear set structure design to achieve multi-turn counting function. However, this traditional design mode has many inherent defects, which seriously restricts its application expansion in high-end scenarios: First, the structure is complex, and the assembly precision requirements of the gear set are stringent, which greatly increases the difficulty of manufacturing. Second, the overall cost is high, as the processing, testing, and subsequent maintenance of high-precision gears all require a large investment. Third, the size space occupancy is large, and the three-dimensional gear set structure results in a large axial dimension of the encoder, making it difficult to adapt to the installation requirements of miniaturized and integrated equipment. Fourth, the service life is limited, as the gear set will inevitably wear during long-term operation, which will not only reduce the angle measurement accuracy but also affect the overall reliability of the angular displacement sensor. This defect is particularly prominent in scenarios with extremely high stability requirements, such as military and high-precision industrial applications.

[0003] To address the aforementioned industry pain points, this invention innovatively proposes a multi-turn angular displacement sensor solution based on intelligent dual-electric technology, completely abandoning the traditional gear set structure and fundamentally solving many drawbacks of traditional products, while also possessing core advantages such as high reliability and high flexibility.

[0004] The core design logic of this solution is "intelligent switching between dual power supplies + intelligent monitoring across the entire link," with the following specific advantages: (1) Stable power supply and guaranteed battery life. The sensor adopts a dual power supply mode of external power supply and built-in intelligent battery. Under normal working conditions, the external power supply is used first, while the built-in battery is charged and stored at the same time. When the external power supply is interrupted, the system can switch to battery power supply mode instantly to ensure that the multi-turn angle measurement is uninterrupted and the counting data is not lost, effectively avoiding the risk of loss of counts when the power is off in traditional software multi-turn counting.

[0005] (2) Simplified structure and wider adaptability. By eliminating the gear set structure, the internal structure of the encoder is greatly simplified and the axial dimension is significantly reduced. This not only reduces the difficulty of manufacturing and the overall cost, but also allows for flexible adaptation to the installation requirements of miniaturized and integrated equipment. It can be widely used in various scenarios such as military industry, high-precision industry, and intelligent equipment.

[0006] (3) Expanding wireless intelligent interconnection capabilities. This invention integrates a wireless WiFi interface and relies on intelligent power technology to transmit angle measurement data to a mobile client in real time or easily connect to the device's Internet of Things system. This design breaks through the limitations of traditional wired connections for angular displacement sensors, further improving the flexibility and ease of use of equipment deployment. At the same time, it realizes remote monitoring of the sensor's working status and cloud processing of measurement data, fully adapting to the needs of industrial intelligent upgrading. Summary of the Invention

[0007] This invention proposes a multi-turn angular displacement sensor based on intelligent dual-electric technology to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a multi-turn angular displacement sensor based on intelligent dual technology, the main components of which include a structure, a rotating shaft, a magnet, and a circuit board; a radially magnetized magnet is placed on the top of the rotating shaft, and the circuit board is fixed to the structure. When the rotating shaft drives the magnet to rotate, the circuit board can detect the changing magnetic field and convert it into an angle signal. Under normal operating conditions, the sensor is powered by an external power supply, and a backup lithium battery is simultaneously charged and stored through an intelligent power supply unit. At this time, the sensing unit detects the changes in the magnetic field generated by the rotating shaft driving the magnet in real time, and transmits the angle signal to the main control unit to complete multi-turn angle counting and real-time data updating. When the external power supply is unexpectedly interrupted, the power supply switching module of the intelligent power unit will instantly and seamlessly switch to backup lithium battery power supply to ensure that the main control unit and sensing unit continue to work, multi-turn angle counting is uninterrupted, and current angle and full-turn data are not lost. At the same time, after the main control unit detects the external power failure, it will send a power failure reminder to the mobile phone through the wireless interaction unit to inform the user of the current power supply status. The user can send control commands through the mobile phone, which are transmitted to the main control unit through the wireless interaction unit. The main control unit will then control the disconnection of backup lithium battery power supply. At the moment of power disconnection, the main control unit will write the current multi-turn angle counting data (including the full-turn count) into its own flash non-volatile memory to permanently save the data. When the sensor is powered on again, the main control unit can directly read the counting data stored in the flash without recounting, ensuring the continuity and integrity of the multi-turn angle data.

[0009] Compared with the prior art, the beneficial effects of the present invention are: This invention utilizes intelligent dual technology to achieve multi-turn counting, replacing the traditional gear set structure. This fundamentally solves the industry pain points of complex structures, excessive size, and easy wear in traditional products, representing a structural innovation in the field of angular displacement sensors. The development and application of dual power supply intelligent switching technology not only ensures power supply stability and data integrity but also enables visualization and controllability of power status, filling the technological gap of traditional angular displacement sensors lacking intelligent monitoring during power outages. In terms of functional innovation, the product integrates a wireless WiFi interface, enabling wireless transmission and remote monitoring of angle measurement data. This overcomes the limitations of wired connections in traditional encoders, expanding the product's application scenarios and value. From an industry development perspective, the technological innovation of this project promotes the transformation of angle encoders from "mechanical transmission" to "intelligent electronic control," leading the industry towards miniaturization, intelligence, and low power consumption. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of a multi-turn angular displacement sensor.

[0011] Figure 2 This is a functional unit diagram of the circuit board for a multi-turn angular displacement sensor.

[0012] Figure 3 This is a circuit diagram of the sensing unit on the circuit board.

[0013] Figure 4 This is the circuit diagram of the main control unit on the circuit board.

[0014] Figure 5 This is a circuit diagram of the intelligent power supply unit on the circuit board.

[0015] Figure 6 This is a circuit diagram of the wireless interaction unit on the circuit board. Detailed Implementation

[0016] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0017] Example: The present invention provides a technical solution, a multi-turn angular displacement sensor based on intelligent dual-electric technology, which includes a structure 1, a rotating shaft 2, a magnet 3, and a circuit board 4; a radially magnetized magnet 3 is placed on the top of the rotating shaft 2, and the circuit board 4 is fixed on the structure 1. When the rotating shaft 2 drives the magnet 3 to rotate, the circuit board 4 can detect the changing magnetic field and convert it into an angle signal.

[0018] Circuit board 4 can be divided into a sensing unit, a main control unit, an intelligent power supply unit, and a wireless interaction unit. The circuit design of each unit will be introduced below.

[0019] Sensing unit circuit ( Figure 3The chip U1 on the circuit board is a non-contact magnetic induction decoding chip. It is fixed on the circuit board 4, directly above the magnet 3, with a gap of about 2mm. When the rotating shaft 2 drives the magnet 3 to rotate, the chip U1 can calculate the angle value of the rotating shaft 2 and send it to the main control unit for angle data decoding via the SPI bus.

[0020] Main control unit circuit ( Figure 4 The module is based on a microcontroller U2 and is powered by 3.3V. Each power interface is equipped with a capacitor (C3) for power filtering to ensure power supply stability. It is paired with a crystal oscillator circuit (X1) and a reset circuit (R3, C5, SW3) to form the most basic working environment. This module is mainly used to process data from various peripherals and drive the wireless interactive power supply unit to transmit data.

[0021] Intelligent power supply unit circuit ( Figure 5 The system consists of three parts: a power switching module, a battery charging module, and a voltage conversion module. The core component is the power switching module, which uses a power management chip U4 paired with a field-effect transistor Q1 to detect when the external power supply is disconnected and switch to battery power. First, the external power supply +5VIN is connected to the input terminal PVIN of the power management chip U4 through a diode D1, and then stably outputs +5V to power the system through its output terminal VPOS. +5VIN, through another diode D1, is connected in parallel with the drain D and gate G of the field-effect transistor Q1 to determine the on / off state of the external power supply +5VIN. When the external power supply +5VIN is normally supplying power, Q1 is in the off state, and the input power terminal PVIN of the power management chip U4 receives power from the external power supply +5VIN. When the external power supply is disconnected, Q1 is in the on state, and the input power terminal PVIN of the power management chip U4 seamlessly switches to battery power VBAT_5V.

[0022] The battery charging module consists of a battery charging chip U5 and its peripheral circuits. It is powered by an external power supply +5VIN to charge the battery. The output terminal BAT of the battery charging chip is connected to the source of Q1. When Q1 is off, the output terminal BAT of the battery charging chip is disconnected from the chip U4. When Q1 is on, the output terminal BAT of the battery charging chip U5 supplies power to the power chip U4 through Q1.

[0023] The voltage conversion module consists of a power chip U3 and its circuitry, which converts +5V to +3.3V for system power supply.

[0024] The wireless interaction unit circuit is based on the wireless module U6. It is configured for Wi-Fi mode and establishes a connection with the preset wireless network to realize remote real-time monitoring and control of the device status. The unit can remotely disconnect the backup battery to achieve power-off operation in battery-powered mode.

Claims

1. A multi-turn angular displacement sensor based on intelligent dual-electric technology, characterized in that, The sensor adopts a gearless assembly structure and has a built-in intelligent power supply unit. The intelligent power supply unit includes a power switching module and a battery charging module. The power switching module includes a power management chip, a field-effect transistor (FET), and a diode. The battery charging module is a charging chip adapted to a backup battery. The external power supply terminal is connected to the power input terminal of the power management chip via a diode, and the external power supply terminal is connected in parallel with the drain and gate of the FET via the diode. The power input terminal of the battery charging module is connected to the external power supply terminal, and the power output terminal of the battery charging module is connected to both the backup battery and the source of the FET. When the external power supply terminal is normally powered, the FET is in the off state, the power management chip is powered solely by the external power supply terminal, and the battery charging module is powered by the external power supply terminal and charges the backup battery. When the external power supply terminal is de-energized, the FET automatically turns on, and the power input terminal of the power management chip seamlessly switches to the backup battery for power supply, realizing seamless switching between external power supply and battery power supply.

2. The multi-turn angular displacement sensor based on intelligent dual-electric technology according to claim 1, characterized in that, The intelligent power supply unit also includes a voltage conversion module. The power input terminal of the voltage conversion module is electrically connected to the power output terminal of the power management chip, and the output terminal is connected to the main control unit and sensing unit of the sensor. It is used to convert the voltage output by the power management chip into a stable operating voltage that is suitable for each functional unit of the sensor, so as to ensure the normal operation of each unit.

3. The multi-turn angular displacement sensor based on intelligent dual-electric technology according to claim 1, characterized in that, The sensor also includes a wireless interaction unit, which is electrically connected to the main control unit. The wireless interaction unit is used to wirelessly transmit the angular displacement measurement data transmitted by the main control unit to an external terminal. It also supports the external terminal to send control commands to the main control unit through the wireless interaction unit, so that the main control unit can control the disconnection of the power supply circuit of the backup battery, thereby realizing the remote management and control of the backup battery.

4. The multi-turn angular displacement sensor based on intelligent power supply technology according to claim 1, characterized in that, The diode is a unidirectional diode, with its conduction direction from the external power supply terminal to the power management chip. It is used to prevent the power of the backup lithium battery from flowing back to the external power supply terminal, thereby avoiding power loss and short circuit faults. The backup battery can be a rechargeable lithium battery. The battery charging module is adapted to the charging parameters of the rechargeable lithium battery and has overcharge, over-discharge and overcurrent protection functions to extend the service life of the backup battery.

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