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Over 20 years of dedicated work,Shanghai Chengong Electrical Control Technology Co,Ltd.has been committed to providing high-quality and reliable electronic control joystick solutions for various industries. Today, we will delve into the causes of Hall effect joystick output anomalies and the innovative measures Shanghai Chengong Electrical Control Technology Co,Ltd. has taken to ensure handle stability and reliability.
In general, since chip malfunctions are extremely rare, the factors affecting Hall output voltage primarily include the following reasons. Therefore, we will mainly analyze the causes of output voltage deviation from the following aspects:
Changes in magnetic flux caused by the magnet:
The magnet can cause changes in magnetic flux for various reasons, resulting in output voltage changes, such as:
A. Poor protection leading to iron powder adhering to the magnet, causing magnetic flux changes. For example, iron powder adhering to the magnet position of the external board electronic control handle used in JLG models.
A. Improper fixing methods of the magnet causing looseness. If riveting is insufficient, there is a risk of the magnet loosening.
C.Hidden cracks during riveting or fixing of the magnet, leading to cracks after high and low temperatures, causing changes in magnetic flux.
Preventive measures: In harsh environments with dust, it is recommended to use IP65+ handles to prevent iron powder and dust from affecting the Hall output. For fixing methods of the magnet, handle manufacturers must use reliable methods and control process stability according to the control plan.
External magnetic field causing output deviation:
Generally, changes in magnetic flux caused by external magnetic fields alter the magnetic flux through the Hall chip, affecting the output.
If the motor design of the whole vehicle is too close to the control box, it will cause magnetic interference to the handle. Magnetic interference generated by the motor (affecting the Hall inside the handle).
Preventive measures: For electronic control handles used in environments with electromagnetic interference, it is necessary to add shielding covers (iron material has the best shielding effect) or shielded metal housings and increase shielding design in the Hall chip circuit.
The outer shielding cover of the Hall PCB board (iron material) and the shielded housing used in electronic control handles.
Output deviation caused by mechanical structure:
After long-term use, mechanical gaps increase, leading to increased output deviation. The impact of electrical signal interference at the wire harness end on the Hall signal.
Preventive measures: Different types of handles have different lifespans. For frequent usage conditions, high-lifespan handles should be selected.
Impact of external electrical signal interference on output:
The Hall signal of the handle can also be affected by electrical signal interference during wire harness transmission.
Preventive measures: Using shielded cables can improve the anti-interference performance of the electronic control handle.
Shielded cables are commonly used in CAN, USB, and general serial port signal lamps, which transmit relatively weak and high-frequency signals. The characteristic impedance at each bus end: 90Ω (USB) 120Ω (CAN).
Impact of external electrical signal interference on output:
Generally, the Hall input voltage specified by handle manufacturers is 5.0Vdc±0.5V. However, in actual use, this voltage value usually refers to the voltage that drives the Hall sensor. If the calibrated output voltage is 0.52.5V4.5V output with a 5.5V input voltage, the mid-position output voltage will become 2.75V, exceeding the mid-position requirement range.
Preventive measures: A stabilized power supply should be used in the control box for power supply. The power supply deviation is generally within ±0.2V, and within ±0.1V if conditions permit.
At Shanghai Chengong Electrical Control Technology, we are not just a manufacturer of electronic control handles but also your partner in project success. Through continuous research and technological innovation, we are dedicated to providing products with excellent performance to meet the evolving control solution needs of various industries. Whether in mining, construction, logistics, or other fields, our electronic control handles create value for customers and improve work efficiency.
Choose Shanghai Chengong Electrical Control Technology, choose trustworthy quality and excellent service. We will continue to strive to provide you with more advanced and reliable electronic control handle products.”
5F Building E, 1355 ChengBei Road, Jiading, Shanghai, China 201807
