Ehvac: Wireless Modular Multi-Zone hvac controller Group b javier Arias Ryan Kastovich Genaro Moore Michael Trampler
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- Section 6: Testing
- 6.2 Remote Sensor Module Testing
- 6.2.1 Human-Machine Interface Testing
- 6.2.2 Sensor Testing
- 6.2.3 Wireless Connectivity
5.3 System Control PrototypingTexas Instruments’ Stellaris LM3S8962 Ethernet+CAN Evaluation kit will be implemented for system control to prototype for this system since the LM3S8962 will be used as the MCU but the CAN device will not be used. At the TI workshop discussed in Section 3.1 Research Methods, a lot of useful information specific to this system as well as multiple development boards was acquired. The LM3S8962 is not a cheap microcontroller and since multiple evaluation kits were acquired at the workshop it made it that much easier to prototype amongst the group members. It comes will a fully integrated Ethernet controller which will be used for the web application-to-MCU interface portion of this system. The microcontroller also has four General-Purpose Timer Modules which can be configured to act as a Real Time Clock instead of trying to integrate another chip on the PCB in the final design. The LM3S8962 has I2C and SPI buses available to interface with which will be useful since the RSMs will communicate to the MCU via a transceiver with a SPI bus interface. The I2C buses can be used to interface with the 74HC595 shift registers that will be used to control different components of an HVAC system. The board has a MicroSD Card Slot so that data, such as web page content, can be stored on removable flash cards using the SD card’s SPI mode. Figure 5.3-1 below is block diagram of the LM3S8962 Evaluation board. As shown, the board has 42 General Purpose I/O pins (GPIO), depending upon the configuration of the user. It comes with an on chip low drop-out voltage regulator, OLED display, magnetic speaker, and several other features. The dual USB controller is a 2-way communication port for serial communication, debugging, and power. The diagram illustrates the flow of signals from the MicroSD card slot or from the USB control through the JTAG MUX then to the microcontroller. 
Figure 5.3-1 LM3S8962 Block Diagram Section 6: Testing6.1 Testing CriteriaThe system will undergo different functionality tests for checking proper operation. These tests will be carried out in a controlled environment where unknowns can be minimized, human error reduced and mistakes should not lead to major system failure or be a hazard to others. They should be repeatable and simple enough to be carried out by a layman who is not familiar with the system. Testing will be split among the three main components in the system: Remote Sensor Module, System UI & Intelligence Module, and System Control Module. Remote Sensor module testing procedures involve checking the following functions:
For testing the System UI & Intelligence the web application and database must be uploaded first to Google App Engine in order to maximize the expected user experience. The tests will be as follows:
System Control module testing will be as follows:
6.2 Remote Sensor Module TestingThe remote sensor module is a complicated subsystem. It was determined that the functionality of the remote sensor module could be completely tested using three comprehensive tests. These tests are targeted at specific functions of the remote sensor module, but by testing them it can be shown that every function built into the module works. These tests are, Human-Machine Interface, Sensors, and Wireless Connectivity. 6.2.1 Human-Machine Interface TestingThe purpose of this test to make sure that the inputs and the outputs of the remote sensor module function as they should. The following tests will test both the hardware and the software that the module’s interface uses. The test can be performed in multiple settings, but it is desirable for the remote sensor module to be tested in an area in which all necessary support equipment is available. That is, the main controller should be within range of the module’s wireless radio, the main controller should be connected to the domicile’s physical plant. The main controller should be fully tested and should function appropriately. The following steps should be taken in the aforementioned setting, in the order specified below.
If all the functions act as expected, then the input/output hardware and software function correctly. 6.2.2 Sensor TestingThe sensors operate automatically, and they operate using timers. To make sure that enough time has elapsed for all sensors to have taken at least one sample the module must be powered on for at least ten minutes before undertaking this series of tests. The test can be performed in multiple settings, but it is desirable for the remote sensor module to be tested in an area in which all necessary support equipment is available. That is, the main controller should be within range of the module’s wireless radio, the main controller should be connected to the domicile’s physical plant. The main controller should be fully tested and should function appropriately. The following steps should be taken in the aforementioned setting, in the order specified below.
6.2.3 Wireless ConnectivityThe wireless connection initializes automatically. The purpose of this test is to ensure that the remote sensor module has a well functioning wireless connection to the main control unit. This series of tests will show that the wireless hardware works, and that both the transmit and receive subroutines work properly. This test requires that the display and input subroutines work properly. The test can be performed in multiple settings, but it is desirable for the remote sensor module to be tested in an area in which all necessary support equipment is available. That is, the main controller should be within range of the module’s wireless radio, the main controller should be connected to the domicile’s physical plant. The main controller should be fully tested and should function appropriately. Wait at least five minutes after power is connected before carrying out the following steps. The following steps should be taken in the aforementioned setting, in the order specified below.
If this test was followed in this order, under these circumstances and the results are as expected, then it can be assumed that the wireless connectivity of the remote sensor module functions properly. Directory: seniordesign seniordesign -> Executive Summary 4 seniordesign -> Hvac control and Feedback System 0 Group 2 Steve Jones Mathew Arcuri Elroy Ashtian, Jr seniordesign -> Group 5 Spr-Sum 2011 seniordesign -> Senior Design II paper seniordesign -> Remote Touchscreen-Controlled Defense Turret Senior Design Documentation Courtney Mann, Brad Clymer, Szu-yu Huang Group 11 seniordesign -> Flight Performance Data Logging System seniordesign -> Amphibious vehicle seniordesign -> T-100 Watch Dog (Autonomous Security Vehicle) seniordesign -> Table of Contents Executive Summary 2 Download 0.49 Mb. Share with your friends:
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