Anti-static wrist-strap grounding-state real-time monitoring method and monitor

Abstract

The invention discloses an anti-static wrist-strap grounding-state real-time monitor and a monitoring method thereof. A grounding wire connection state monitoring circuit connecting a grounding wire and an anti-static wrist strap grounding system resistor monitoring circuit connecting an anti-static wrist strap are included. During working, the method comprises the following steps that S1, the grounding wire connection state monitoring circuit monitors a grounding wire connection condition, and when the grounding wire is in a connection state, a S2 step is executed and a green light is turned on; when the grounding wire is in a disconnected state, sound-light alarm is emitted and the S2 step is not executed; S2, the anti-static wrist strap grounding system resistor monitoring circuit monitors a grounding resistance of a human body which is connected to the circuit through the anti-static wrist strap, a converted voltage signal is compared to a preset standard voltage signal, and according to a comparison result, a second state indication circuit is controlled to work. In the invention, monitoring requirements of two kinds of anti-static wrist straps can be effectively satisfied, versatility is good, and grounding wire state monitoring and grounding resistor monitoring are realized so that a monitoring result is accurate and a standard requirement is satisfied.

Description

technical field [0001] The invention relates to a monitoring method and a monitoring instrument, in particular to a real-time monitoring method and a monitoring instrument for the grounding state of an antistatic wrist strap. Background technique [0002] At present, the most basic and effective means of electrostatic safety protection for on-site workers in the electronics industry is to wear anti-static wrist straps. Anti-static wrist straps mainly include single-circuit wrist straps and double-circuit wrist straps. The working status of the device is often monitored by the monitor. The monitoring of the existing single-circuit wristband and the double-circuit wristband are often realized by the monitor. However, due to the large difference in the monitoring methods of the two, the corresponding monitor The monitoring principles are different, so they are not universal. When the customer upgrades or changes the layout of the production line, after changing the type of wris...

AI Technical Summary

Problems solved by technology

[0002] At present, the most basic and effective means of electrostatic safety protection for on-site workers in the electronics industry is to wear anti-static wrist straps. Anti-static wrist straps mainly include single-circuit wrist straps and double-circuit wrist straps. The working status of the device is often monitored by the monitor. The monitoring of the existing single-circuit wristband and the double-circuit wristband are often realized by the monitor. However, due to the large difference in the monitoring methods of the two, the corresponding monitor The monitoring principles are different, so they are not universal. When the customer upgrades or changes the layout of the production line, after changing the type of wrist strap, the wrist strap monitor needs to be changed synchronously, which is very costly and brings a lot of trouble. inconvenient

[0003] On the other hand, the current monitors can only monitor whether the anti-static wrist strap is connected to the circuit or whether the connection method is accurate, but cannot monitor whether the connection status of the grounding wire is normal, so there is a certain lack of monitoring in the monitoring;

[0004] Furthermore, the existing monitors cannot monitor the ground resistance when the human body is connected to the circuit, so it cannot guarantee that the ground resistance meets the requirements of relevant standards

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