About static electricity
A crisp autumn season
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Tips on living static electricity
You know what?
The static electricity generated by people when combing hair is about 3000V
The static electricity generated by one step of walking is about 5000V
The static electricity generated when people tear and stick the tape is about 25000 V
The static electricity generated when people are working while sitting is about 6000V
The static electricity of the plastic bag itself is about 7000V
The static electricity is about 20000V when the plastic bag is lifted from the worktable
。。。。 (The above data should be under specific humidity, for reference only)
Why can't I feel it?
Because static electricity is a relatively static charge, which accumulates on the surface of an object and does not flow as easily as the current in a metal conductor, it is called static electricity.
How can I feel it?
When objects with different electrostatic potentials are close to or directly contacted with each other, they will cause charge transfer, thus forming electrostatic discharge, which is also commonly called ESD. It is the abbreviation of Electrostatic Discharge in English, namely ElectroStatic Discharge. Electrostatic discharge has the characteristics of high voltage, strong electric field, instantaneous large current, etc.
Hazards of ESD
The static electricity cannot be seen or touched. Only when enough charges are accumulated and the discharge conditions are met, can there be a sense of electric shock or a weak sound when discharging instantaneously.
However, a very small "electrostatic discharge" can cause irreversible circuit damage to our precision devices. For example, the GMR head can only withstand 5V static electricity.
Hazards of ESD (electrostatic discharge)
- Sparks may occur during electrostatic discharge, which may easily cause fire, explosion and other safety accidents.
- Electrostatic discharge will breakdown the device and damage the device, thus reducing the reliability of the device.
- Electrostatic discharge will radiate radio waves with frequency, causing electronic interference and affecting the normal operation of devices.
Electrostatic Protection Measures for Precision Devices
01 Electrostatic protection measures for precision devices generally include:
Device internal protection method: usually, the protection method is to make the protection circuit in the part related to the input terminal, and the common method is to use diode, triode, zener diode and spark gap protection;
Device external protection method: the simplest method is to connect a resistor in series or a diode in parallel at the input end of the device;
02 Protection of devices by anti-static system
The specific measure to establish an anti-static system is generally to set up an anti-static working area. It needs to be controlled from five aspects: human, machine, material, method and environment:
Dynetech anti-static system
The Dynetech electrostatic protection system uses advanced Internet of Things technology to realize the visualization and intelligent management of the ESD environment in the factory, and feedback the effectiveness of the electrostatic removal system in real time.
Dynetech electrostatic protection system is excellent
✔ Save the labor cost of plant ESD control
✔ Improve plant ESD control level and process yield
✔ Access to factory MES system
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