Multifunctional grounding monitoring hybrid selection amplification circuit

Abstract

The utility model discloses a multifunctional grounding monitoring hybrid selection amplification circuit, and solves the problems that the number of access points of ESD grounding monitoring equipment is limited, the installation is complex, and the cost is high. The circuit comprises a signal input selection control device, a harmonic wave and information source processing circuit, an MCU data operation center, an LCD display device, an Internet of Things communication device and the like. The signal input selection control device selects an input signal according to a test requirement, the harmonic wave and signal source processing circuit performs impedance matching, harmonic wave filtering and signal amplification on the signal, and the processed signal is analyzed and displayed by the MCU data operation center or uploaded through the Internet of Things communication device. The system is suitable for various grounding monitoring scenes, and has the advantages of low cost, strong expansibility, accurate data processing and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to the ESD ground monitoring field, concretely relates to a multifunctional ground monitoring mixed type selection amplification circuit. BACKGROUND

[0002] With the rapid development of electronic industry and semiconductor manufacturing industry, static electricity has become an important factor threatening the reliability of electronic equipment and components. Static electricity can cause electronic component damage, data loss, chip failure and damage to sensitive devices. Therefore, electrostatic discharge (ESD) protection technology is widely valued in the industry, and the demand for grounding monitoring devices in enterprises is increasing.

[0003] Currently, the existing ESD grounding monitoring equipment generally has problems such as limited number of access points, difficult equipment expansion, complex installation, and high cost in application. In order to meet the larger static protection demand, additional monitoring host and supporting equipment are often needed, resulting in a significant increase in system cost. In addition, the data acquisition and processing accuracy of traditional monitoring equipment is insufficient, which cannot comprehensively and accurately monitor the state of various grounding resistances, and is difficult to adapt to the actual application of multi-point monitoring and centralized management. SUMMARY

[0004] In order to solve the above problems, the utility model provides a kind of multifunctional ground monitoring mixed type selection amplification circuit, support multiway signal acquisition, accurate signal processing, low cost, easy expansion multifunctional ground monitoring mixed type selection amplification circuit, become the key technical direction of solving the above problems. The circuit can realize the unified monitoring of equipment grounding, wrist strap grounding and platform pad grounding, improve the practicability and reliability of the system, and adapt to diversified industrial application needs.

[0005] The utility model is realized through the following technical schemes: a kind of multifunctional ground monitoring mixed type selection amplification circuit, comprising:

[0006] Signal input selection control device is used to receive multiple input signals, and selectively control input signals according to test requirements, and output selected signals to harmonic and signal source processing circuit;

[0007] Harmonic and signal source processing circuit, including input impedance matching circuit, harmonic filter circuit and signal source amplification circuit, the harmonic and signal source processing circuit carries out impedance matching, harmonic filter and amplification processing to the received signal, and exports the signal after processing to MCU data operation center;

[0008] MCU data operation center, including single-chip microcomputer operation device, is used to carry out data acquisition, storage, analysis and control to the received signal, and drive display device and communication device;

[0009] An LCD display device is connected with the MCU data operation center and used for displaying test data, equipment ID information and historical data.

[0010] An Internet of Things communication device is connected with the MCU data operation center and used for realizing data storage, statistical analysis and report generation.

[0011] An equipment grounding monitoring device comprises a plurality of equipment grounding resistance sampling circuits, and the resistance sampling circuits are used for monitoring equipment grounding resistances in the range of 0.1Ω to 100Ω.

[0012] A wristband grounding monitoring device comprises a plurality of human body electrostatic discharge resistance sampling circuits, and the resistance sampling circuits are used for monitoring human body grounding resistances in the range of 1KΩ to 50MΩ.

[0013] A table mat grounding monitoring device comprises a plurality of electrostatic table mat grounding resistance sampling circuits, and the resistance sampling circuits are used for monitoring table mat grounding resistances in the range of 1KΩ to 100MΩ.

[0014] As a preferred technical solution, the signal input selection control device comprises an electronic module selection switch, which is used for switching different input signal channels through protocols.

[0015] As a preferred technical solution, the harmonic and signal source processing circuit comprises:

[0016] An input impedance matching circuit is composed of resistors and capacitors and is used for improving signal transmission efficiency.

[0017] A harmonic filter circuit is composed of resistors and capacitors and is used for removing high-order harmonics.

[0018] A signal source amplification circuit is composed of operational amplifiers and resistors and is used for enhancing signal strength.

[0019] As a preferred technical solution, the MCU data operation center further comprises a data uploading module, which is used for uploading processed data to an external data management platform.

[0020] As a preferred technical solution, the LCD display device supports multi-interface display functions, including a real-time data interface and a historical data interface.

[0021] As a preferred technical solution, the Internet of Things communication device supports a plurality of communication protocols, including WiFi, Ethernet and cellular networks, and is used for adapting to data transmission requirements of different application scenarios.

[0022] The utility model discloses a signal input selection control device, realize the flexible switching and collection of multichannel signal, be applicable to equipment grounding, wristband grounding and table mat grounding and a plurality of application scenes, effectively improve the adaptability and extension ability of system.

[0023] Adopt harmonic and source processing circuit, can carry out impedance matching, harmonic filter and amplification processing to input signal, ensure the accuracy and stability of signal processing;

[0024] The built-in MCU data operation center not only supports data acquisition, operation and storage, but also realizes remote data uploading and monitoring through the Internet of Things communication device, enhances the data management and intelligent analysis function of the system, and the LCD display device can display the monitoring data and equipment information in real time, and provide an intuitive operation interface;

[0025] The utility model discloses a modular design reduces the dependence on multiple host devices, reduces hardware cost and construction difficulty, significantly improves the economy and installation convenience of the system, is suitable for electronic manufacturing, semiconductor production and other high electrostatic protection requirement industrial scenes, and has wide market application potential and industry competitiveness. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will briefly introduce the drawing needed to be used in the embodiment or prior art description, obviously, the drawing in the following description is only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0027] Figure 1 It is a system block diagram of the utility model;

[0028] Figure 2 It is a circuit principle diagram of the automatic inspection data acquisition control device of the utility model. DETAILED DESCRIPTION

[0029] All features disclosed in this specification, or the steps in all methods or processes disclosed, can be combined in any manner, except for mutually exclusive features and / or steps.

[0030] Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), unless specifically stated otherwise, can be replaced by alternative features or equivalents of the same. That is, unless specifically stated, each feature is only one example of a range of equivalent or similar features.

[0031] As Figure 1 And Figure 2 The utility model provides a kind of multifunctional grounding monitoring hybrid selection amplification circuit, including multiple circuit modules and devices, and it is comprehensively described on signal input, signal processing, data operation and display, Internet of Things communication etc. in function realization.

[0032] Firstly, the signal input selection control device is used to receive multiple input signals from the equipment grounding monitoring device, the wristband grounding monitoring device and the platform grounding monitoring device. The device selects different signal channels according to different test requirements through the electronic module selection switch (U1), and sends the signals to the subsequent signal processing circuit. The selection control device can design different frequencies for different input signal sources, and selectively switch the signal input.

[0033] Next, the signals are transmitted to the harmonic and signal source processing circuit. The circuit mainly consists of an input impedance matching circuit, a harmonic filter circuit and a signal source amplification circuit. In the input impedance matching circuit part, composed of resistor (R4) and capacitor (C7), it is used to improve the signal transmission efficiency and match the input signal impedance to ensure the effective transmission of the signal. Then, the signal passes through the harmonic filter circuit, which is composed of resistors (R1, R2), capacitors (C6, C7) and operational amplifier (U2), which is used to filter high frequency harmonics and ensure the purity of the signal. The signal source amplification circuit is composed of operational amplifier (U2) and resistor (R3), which is used to enhance the strength of the signal to ensure that the signal is strong enough in the subsequent data acquisition process, and improve the sensitivity and accuracy of the system.

[0034] The processed signals will be sent to the MCU data operation center. The center is mainly composed of a single-chip microcomputer operation device (MCU control device), which is responsible for data acquisition, storage, analysis, control and other operations on the received signals. The MCU control device drives the connected LCD display device to display real-time test data, equipment ID information and historical data. Through the Internet of Things communication device, the MCU data operation center can also realize data uploading and storage, support remote monitoring and data management functions, and facilitate users to conduct centralized management and statistical analysis.

[0035] For the grounding monitoring device, the equipment grounding monitoring device, the wristband grounding monitoring device and the platform grounding monitoring device monitor the equipment grounding resistance, the human body grounding resistance and the platform grounding resistance respectively. The equipment grounding monitoring device is composed of multiple resistance sampling circuits (CDR1, CDR2, CDR3, IR1, IR2, IR3, etc.), which monitor the equipment grounding resistance in the range of 0.1Ω to 100Ω; the wristband grounding monitoring device is composed of multiple resistance sampling circuits (CDR4, IR4, SR1, SR4, etc.), which monitor the human body grounding resistance in the range of 1KΩ to 50MΩ; the platform grounding monitoring device is composed of multiple resistance sampling circuits (CDR5, IR5, SR5, etc.), which monitor the platform grounding resistance in the range of 1KΩ to 100MΩ. All signals are sent to the harmonic and signal source processing circuit for processing, and then analyzed, stored and displayed by the MCU data operation center.

[0036] In the ohm test loop device, CDR1, CDR2, CDR3, etc. Resistance sampling circuit is used for three-way equipment grounding sampling, CDR4, IR4, SR4, etc. Circuit is used for wrist strap grounding sampling, CDR5, IR5, SR5, etc. Circuit is used for table pad grounding sampling. These signals are input to the selection control device, processed and sent to the subsequent processing circuit.

[0037] The selection control device selects the signal channel through the electronic module selection switch (U1). The selection device switches the input signal channel through the protocol, ensuring that the collection and processing of different signal sources can be accurately switched, avoiding signal interference.

[0038] The specific design of the harmonic and signal processing circuit includes multiple resistors, capacitors, operational amplifiers, etc. Ensure that the signal is not lost during transmission, and can effectively remove high-frequency harmonics. The input impedance matching circuit (R4, C7) improves the transmission efficiency of the signal, while the harmonic filter circuit (R1, R2, C6, C7) removes unwanted frequency components, ensuring the purity of the signal. The signal source amplification circuit (U2, R3) enhances the strength of the signal, ensuring that the subsequent data collection accurately reflects the changes in the grounding resistance.

[0039] In the MCU data operation center part, the single-chip microcomputer (MCU) executes the core control tasks such as data collection, storage, analysis, upload, etc. through the built-in operation device. At the same time, the MCU is also connected with the LCD display device and the Internet of Things communication device, ensuring real-time display and remote transmission of data. The LCD display device displays real-time data and historical records, providing an intuitive operation interface for users, facilitating monitoring and managing device status.

[0040] The Internet of Things communication device supports multiple communication protocols such as WiFi, Ethernet and cellular network, realizing remote uploading and storage of data. Users can store, statistically analyze and generate reports on data through the Internet of Things platform, improving the efficiency and intelligent level of data management.

[0041] The multifunctional grounding monitoring hybrid selection amplification circuit solves the problems of signal interference, inaccurate data collection and poor expandability in existing systems through precise signal selection, processing and data operation functions. By integrating multiple functional modules, not only the monitoring accuracy and stability are improved, but also the hardware cost of the system is reduced, and the cost performance of the equipment is improved. It is widely used in industries with high requirements for electrostatic protection such as electronic manufacturing and semiconductor production, and has strong market competitiveness.

[0042] The above merely describes a specific implementation of the present application, but the protection scope of the present application is not limited thereto, any change or replacement not through creative labor should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be limited by the protection scope defined in the claims.

Claims

1. A multifunctional grounding monitoring hybrid selective amplifier circuit, characterized in that, include: The signal input selection control device is used to receive multiple input signals and selectively control the input signals according to the test requirements, and output the selected signal to the harmonic and signal source processing circuit. The harmonic and signal source processing circuit includes an input impedance matching circuit, a harmonic filtering circuit, and a signal source amplification circuit. The harmonic and signal source processing circuit performs impedance matching, harmonic filtering, and amplification on the received signal, and outputs the processed signal to the MCU data processing center. The MCU data processing center, including the microcontroller processing unit, is used to acquire, store, analyze and control the received signals, and drive the display device and communication device. An LCD display device is connected to the MCU data processing center and is used to display test data, device ID information, and historical data. An Internet of Things (IoT) communication device is connected to the MCU data processing center to realize data storage, statistical analysis, and report generation; The equipment grounding monitoring device includes multiple equipment grounding resistance sampling circuits, which are used to monitor the equipment grounding resistance in the range of 0.1Ω to 100Ω; The wristband grounding monitoring device includes multiple human body electrostatic discharge resistance sampling circuits, which are used to monitor the human body grounding resistance in the range of 1KΩ to 50MΩ. The table mat grounding monitoring device includes multiple electrostatic table mat grounding resistance sampling circuits, which are used to monitor the table mat grounding resistance in the range of 1KΩ to 100MΩ.

2. The multifunctional grounding monitoring hybrid selective amplifier circuit according to claim 1, characterized in that: The signal input selection control device includes an electronic module selection switch, used to switch different input signal channels according to a protocol.

3. The multifunctional grounding monitoring hybrid selective amplifier circuit according to claim 1, characterized in that: The harmonic and signal source processing circuit includes: An input impedance matching circuit, consisting of resistors and capacitors, is used to improve signal transmission efficiency. Harmonic filtering circuits, consisting of resistors and capacitors, are used to remove higher-order harmonics; A signal source amplifier circuit, consisting of an operational amplifier and resistors, is used to enhance signal strength.

4. The multifunctional grounding monitoring hybrid selective amplifier circuit according to claim 1, characterized in that: The MCU data processing center further includes a data upload module for uploading the processed data to an external data management platform.

5. The multifunctional grounding monitoring hybrid selective amplifier circuit according to claim 1, characterized in that: The LCD display device supports multi-interface display functions, including a real-time data interface and a historical data interface.

6. The multifunctional grounding monitoring hybrid selective amplifier circuit according to claim 1, characterized in that: The IoT communication device supports multiple communication protocols, including WiFi, Ethernet and cellular networks, to adapt to the data transmission needs of different application scenarios.

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