This document describes a web-based human-machine interface (HMI) and integrated testing system. The system allows remote testing of instruments connected via GPIB without needing specialized software. It uses a GPIB USB controller to connect instruments like a function generator and oscilloscope to a Raspberry Pi running a Python web server. Test plans can be run from a web client, which communicates with the server via a REST API. The server handles instrument control via GPIB and returns measurement data to the client. This provides a low-cost solution for automated testing without LabVIEW.

1. 量 測 儀 表 聯 網
組員 : 陳冠宏 陳健儒 沈柏安 吳庭瑜
Web HMI and Integrated Testing System

2. Outline
Introduction
System
GPIB
Client
Cloud Server
Web API

3. Introduction
Stay up all night for R&D Testing ?
Routine Testing Tasks ?
 VB，VC++，C# coding ?

4. LabVIEW --> Powerful, lots of toolkits, need
Authorized License or HASP

5. Web HMI and Integrated Testing System
Our Solutions
Custom Design UI

6. Web HMI and Integrated Testing System
Open Source
Pyserial
Apache
Tornado ….
Our Solutions
Embedded Linux

7. System Concept

8. System Detail

9. Instruments w/ GPIB interface
Function Generator
 Tektronix AFG-320
Oscilloscope
 HP 54600B
DUT
 an OP Amp Circuit

10. Test Plan Setup

11. GPIB USB Controller
PROLOGIX GPIB-USB Controller
 Operate in GPIB Controller mode via USB port
 Support GPIB protocol

12. What is GPIB
GPIB : General Purpose Interface Bus
History
 Developed by HP in 1960s --> HP-IB
 IEEE standardized the bus --> ANSI/IEEE-488.1
 Commands and Protocol --> ANSI/IEEE-488.2
 IEEE/IEC revised in 2004 --> IEC-60488-1,-2
 Standard Commands for Programmable
Instruments --> SCPI-1999

13. GPIB Network
Star network，max 15 devices
Controller * 1，Listener * N， Talker * 1

14. GPIB Cables
24 lines
 8 Data lines, up to 8M bit/s
 5 Manage lines
 3 Handshake lines
 8 GND and Shield lines

15. GPIB Handshaking

16. GPIB/SCPI Commands
Set operation
 Address，On/Off，Mode，Value
Query operation
 Read --> Status，Data
Commands Hierarchy
:MEAS : CURR : AC ? n

17. Client – Control Flow

18. Server and Client - TCP/IP Packet

19. Cloud Server - Backend Data Flow

20. Cloud Server - Frontend Service

21. Web API – Single Test

22. Web API – Loop Testing

23. Web API – Chart

24. Conclusion

25. Reference
http://prologix.biz/gpib-usb-controller.html
https://en.wikipedia.org/wiki/IEEE-488
http://www.keysight.com/
https://webstore.iec.ch/publication/2245
https://en.wikipedia.org/wiki/SCPI
https://docs.python.org/3/tutorial/index.html
http://pythonhosted.org/pyserial/
http://www.w3schools.com/
http://canvasjs.com/javascript-charts/
http://httpd.apache.org/
http://blog.ittraining.com.tw/
Python Programming for Arduino (Pratik Desai)
Raspberry Pi 嵌入式Linux 系統實務 (范振泰)
電子實習與專題製作：感測器應用篇 ( 盧明智 許陳鑑)
Linux完全自學手冊：疑難排解全攻略 (酆士昌)
陳冠宏 Catfish.ep87@nctu.edu.tw
陳健儒 Billyou83462@gmail.com

26. Appendix - Device Under Test
BW
0.707 -3dB
1.0