CN-115963367-B - Integrated device for measuring shielding performance of anti-static shielding packaging bag

CN115963367BCN 115963367 BCN115963367 BCN 115963367BCN-115963367-B

Abstract

The invention relates to an integrated device for measuring shielding performance of an anti-static shielding packaging bag, which comprises an ESD simulator, a capacitance probe, a current and voltage function selection relay, a current transformer and at least one voltage divider, a waveform acquisition module, a control module and a calibration interface, wherein the ESD simulator comprises a discharge switch, a high-voltage power supply, an energy storage capacitor and a discharge network which are respectively connected with the discharge switch, the capacitance probe is connected with the discharge network, the current and voltage function selection relay is connected with the capacitance probe, the current transformer and the voltage divider are connected with the current and voltage function selection relay, the waveform acquisition module is connected with the current transformer and the voltage divider, the control module is connected with the waveform acquisition module, the calibration interface comprises a current calibration interface, a capacitance and resistance network calibration interface and a high-voltage output calibration interface, and the discharge network is configured to be controlled by the current and voltage function selection relay to be switched in a discharging mode of at least 200pF and 400kΩ or 100pF and 1500 Ω. The invention can realize the detection functions of the induced voltage peak value difference method and the induced energy method simultaneously, and has extremely high universality, applicability and practicability.

Inventors

MEI GAOFENG
XIAO ZHIKANG
LIU MIN
GAO ZHILIANG
ZHOU LI
YANG MING
HU ZIJUN
ZHANG YU
HAN YANHUI
YAN FENG

Assignees

北京东方计量测试研究所

Dates

Publication Date: 20260508
Application Date: 20230106

Claims (10)

1. An integrated device for measuring shielding performance of an anti-static shielding packaging bag, which is characterized by comprising: the ESD simulator comprises a discharge switch, a high-voltage power supply, an energy storage capacitor and a discharge network, wherein the high-voltage power supply, the energy storage capacitor and the discharge network are respectively connected with the discharge switch; the capacitive probe is connected with the discharge network; The current and voltage function selection relay is connected with the capacitance probe; the current transformer is connected with the current and voltage function selection relay; At least one voltage divider connected to the current and voltage function selection relay; The waveform acquisition module is respectively connected with the current transformer and the at least one voltage divider; the control module is connected with the waveform acquisition module; The calibration interface comprises a current calibration interface connected with the current transformer, a capacitance-resistance network calibration interface connected with the discharge network and a high-voltage output calibration interface connected with the high-voltage power supply; The discharging network is configured to switch a plurality of discharging modes under the control of the current and voltage function selecting relay, wherein the discharging modes at least comprise a first mode and a second mode, the first mode is a 200pF discharging mode and a 400kΩ discharging mode, and the second mode is a 100pF discharging mode and a 1500 kΩ discharging mode.
2. The integrated device for measuring shielding performance of an anti-static shielding packaging bag according to claim 1, wherein the current transformer is multiplexed with the current calibration interface, a primary side of the current transformer is a turn coil, two ends of the primary side are connected with or disconnected from two electrodes of the capacitance probe through the current and voltage function selection relay, and the primary side is also connected with a BNC terminal for current calibration in parallel; And the secondary side of the current transformer is connected with a resistor voltage dividing network and is matched with a current acquisition input port of the waveform acquisition module.
3. The integrated device for measuring shielding performance of an anti-static shielding packaging bag according to claim 2, wherein the voltage divider is multiplexed with the high-voltage output calibration interface, and two electrodes of the capacitance probe are connected with or disconnected from two branches of series resistors through the current and voltage function selection relay, wherein each branch has two voltage division measuring points: The first voltage division point is positioned between the 10MΩ resistor and the 100kΩ resistor and is connected to the BNC core wire for voltage calibration; the second voltage division point is positioned between the 100k omega resistor and the 9.1k omega resistor and is connected to the voltage waveform acquisition input port; And the two branches respectively correspond to one BNC core wire and one voltage waveform acquisition input port.
4. The integrated device for measuring shielding performance of an anti-static shielding packaging bag according to claim 3, wherein the current calibration interface comprises three BNC ports, namely a calibration current input port, a trigger 1 port and a trigger 2 port; The capacitive resistive network calibration interface includes at least one terminal for connection to a circuit board; The high voltage output calibration interface includes at least one terminal for connection to a circuit board.
5. The integrated device for measuring shielding performance of an anti-static shielding packaging bag according to claim 4, wherein the number of the voltage dividers is two, the waveform acquisition module comprises three waveform acquisitions, namely two voltage waveform acquisitions and one current waveform acquisition, each waveform acquisition comprises a gain amplifier and an analog-to-digital converter, wherein: the two voltage waveform acquisitions are respectively connected with one voltage divider; and the current waveform of one path is collected and connected with the resistor voltage dividing network of the secondary side of the current transformer.
6. The integrated apparatus for measuring shielding performance of an anti-static shielding packaging bag of claim 5, wherein the control module comprises: FPGA; the RAM is connected with the FPGA; the touch screen display is connected with the FPGA; the communication interface is connected with the FPGA; and the relay driving control interface is connected with the FPGA.
7. The integrated device for measuring shielding performance of an anti-static shielding packaging bag according to claim 6, wherein the control module further comprises three analog-to-digital conversion interfaces, and the three analog-to-digital conversion interfaces respectively correspond to the two voltage waveform acquisitions and the one current waveform acquisitions.
8. The integrated apparatus for measuring shielding performance of an anti-static shielding packaging bag of claim 6 wherein the RAM is configured to hold a digital waveform and to calculate the voltage peak difference and the energy of a current waveform in cooperation with the FPGA.
9. The integrated device for measuring shielding performance of an anti-static shielding packaging bag according to any one of claims 6 to 8, wherein the communication interface is configured to be connected with an upper computer, the FPGA comprises an MCU core, the MCU core is connected with the upper computer as a lower computer platform, and functions of the MCU core include man-machine interface interaction control, ESD discharge trigger logic, data acquisition and trigger, range conversion, waveform storage, waveform display, pulse energy calculation, storing correction data, and upper computer communication.
10. The integrated apparatus for measuring shielding performance of an anti-static shielding packaging bag according to claim 1, wherein the ESD simulator further comprises a high voltage display unit connected to the high voltage power supply.

Description

Integrated device for measuring shielding performance of anti-static shielding packaging bag Technical Field The invention relates to the field of electrostatic discharge detection, in particular to an integrated device for measuring shielding performance of an anti-electrostatic shielding packaging bag. Background The anti-static shielding packaging bag is characterized in that the anti-static shielding packaging bag is not easy to rub and electrify, static dissipative materials are adopted, charges are easy to balance into an equipotential body, the anti-static shielding packaging bag has the effect of inhibiting the rapid release of large current for internal or external contact discharge, has the function of static discharge shielding, and can attenuate the penetration of static discharge energy of rapid discharge. At present, two main methods for measuring the shielding performance of a shielding bag are available, namely an induced voltage peak value difference method and an induced energy method. The induced voltage peak difference method corresponds to the national army standard GJB2605-96, heat-sealable Flexible antistatic Barrier Material Specification, and the American electronic industry Association Standard EIA-541-1998. The corresponding standard of the induction energy method is American electrostatic discharge institute standard ANSI/ESD STM11.31-2006 and aerospace standard Q/QJA 122-2013, which are the detection methods of anti-static shielding packaging bags of aerospace electronic products. For the induced voltage peak difference method, a discrete component, an oscilloscope and other construction principle prototypes can be used for testing temporarily, however, the method has poor testing consistency and is not beneficial to popularization. For the induction energy method, no relevant instruments and equipment exist in China at present. Disclosure of Invention Therefore, the embodiment of the invention aims to provide an integrated device for measuring the shielding performance of the anti-static shielding packaging bag, and the integrated device has the sensing voltage peak value difference method and the sensing energy method detection function. The embodiment of the invention provides an integrated device for measuring shielding performance of an anti-static shielding packaging bag, which comprises an ESD simulator, a capacitor probe, a current and voltage function selection relay, at least one voltage divider, a waveform acquisition module, a control module, a calibration interface, a current calibration interface, a capacitor resistance network calibration interface and a high-voltage output calibration interface, wherein the high-voltage power supply, the capacitor probe and the discharge network are respectively connected with a discharge switch, the capacitor probe is connected with the discharge network, the current and voltage function selection relay is connected with the capacitor probe, the current transformer is connected with the current and voltage function selection relay, the at least one voltage divider is connected with the current and voltage function selection relay, the waveform acquisition module is connected with the current transformer and the voltage divider, the control module is connected with the waveform acquisition module, the calibration interface comprises a current calibration interface connected with the current transformer, a capacitor resistance network calibration interface connected with the discharge network and a high-voltage output calibration interface connected with the high-voltage power supply, the discharge network is configured to be switched in a plurality of discharge modes under the control of the current and voltage function selection relay, the discharge network at least comprises a first mode and a second mode, the first mode and a second mode are 200 omega and a second mode are a second mode and a second mode are a discharging mode and a second mode is a 100pF and a second mode. In the preferred embodiment of the invention, the current transformer is multiplexed with the current calibration interface, the primary side of the current transformer is a coil, two ends of the primary side are connected with or disconnected from two electrodes of the capacitance probe through the current and voltage function selection relay, the primary side is also connected with a BNC terminal for current calibration in parallel, and the secondary side of the current transformer is connected with a resistor voltage division network and is matched with a current acquisition input port of the waveform acquisition module. In a preferred embodiment of the invention, the voltage divider is multiplexed with the high-voltage output calibration interface, two electrodes of the capacitance probe are connected with or disconnected from branches of two series resistors through the current and voltage function selection relay, wherein each branch has two voltage d