Design And Implementation Of The Controlling System Of Laser Intensity Sampling Rate Measuring Device

The "Laser Intensity Sampling Rate Measuring Device" is a device for measuring the low transmittance elements’ transmissivity. The device can measure the entire DUT under the control of the controlling system. The topic would design the controlling system.A corresponding control model is designed according to the control tasks. This model meets the following requirements:1.Could control the individual control parts of the device;2. Achieve measurement process automation. The three-tier modular system architecture is proposed on the basis of the model The bottom layer is a function of each device API; The middle layer packages API functions; The top layer controls the entire measuring process.The middle layer includes motion control module, a data acquisition module and the test light source control module. The motion control module focused on solving the problem of coordination between the various components; The Data acquisition module focused on solving the problem of gathering raw data synchronization; The light control module focused on solving the problem of laser controlling. The top layer has two functions:one is interacting with the control interface (Obtains measurement parameters and returns the measurement results) and the other is controlling the entire measuring process by calling the middle layer’s services.The object-oriented is used when implementing the controlling system. Each module is abstracted into a class and the resource that module needs is defined as member variable of the class. The member functions could use the resource to control. Define the object of middle layer class as the member variable of top layer class. The relationship between the top class and middle class is Aggregation.Theoretical analysis shows that the system to normal operation depends on two factors: first, whether it will be initialized accurately before measuring the mechanical components, the second is that the measurement parameters should be reasonably setted. To meet the first condition, an experiment is designed to confirm the reliability of the initialization method. To meet the second condition, The constraint relations are found between the measurement parameters through theoretical calculations. Experiments show that the testing results of the controlling system are reliable under the premise of satisfying the aforementioned two conditions.