In the thermal displacement detection, the high-frequency reflective eddy current sensor is used, and the frequency is generally in the order of MHz. Under normal circumstances, the first-stage frequency divider is added to directly detect the frequency by the single-chip microcomputer. The control system takes the single-chip microcomputer 89C51 as the core, and the heat source and the cold source are controlled by P113 and P114. The purpose of using photoelectric isolation is to improve the anti-interference ability of the whole system. In the field control, there may be interference caused by the MCU program. In this case, in order to continue the normal operation of the microcontroller, a watchdog circuit composed of the CD4060 chip is added. The eddy current sensor is a non-contact sensor. It has many advantages, such as large measuring range, small volume, strong anti-interference ability, and is not affected by medium such as oil and water between the measured object and the sensor, but it also has disadvantages, and the output frequency is not only related to distance, but also The material, shape and surrounding environment of the measured object are related. Therefore, when measuring accurately, it must be subjected to online calibration. The data obtained by the calibration is processed and input by the keyboard and placed in the E2PROM 93C46. The 93C46 has both an online rewriting function and a feature that the power down information is not lost. Therefore, after the entire system is scaled, it is not required to reset the parameters due to shutdown. In order to further verify the effectiveness of the neural network algorithm, the experimental calibration values ​​of the other three sets of sensors are given. It is compared with the estimated values ​​obtained by the neural network algorithm. Similarly, the experimental data is scaled in the y direction and continuously learned by the learning algorithm. When the number of iterations is 50000, it is found that W0=2170345, W1=-2110629, W2=4135136, W3=-3119801, ERMS=01005095. After the proposal of the spindle thermal displacement monitoring system is put forward, the performance is stable and reliable after on-site debugging. The computational processing and comparison of the results of the neural network algorithm by the computer show that the neural network algorithm has application value in the online calibration of the eddy current sensor, and it is an extremely effective online calibration processing method. (Finish)
Electric Kettle
Electric Kettle are made by food grand stainless steel and
Polypropylene. It helps you to have a 1.8L bottle of boiled water in 5 minutes.
Type 201 Stainless stell is the main material for the electric kettle housing.
sometimes called a tea kettle or teakettle, is a type of pot, typically metal,
specialized for boiling water, with a lid, spout, and handle, or a small
kitchen appliance of similar shape that functions in a self-contained manner.
Kettles can be heated either by placing on a stove, or by their own internal
electric heating element in the appliance versions.
Features:
360-degree swivel base: Great way with
cordless pouring; kettle lifts off base for cord. Separate base to move kettle
conveniently, 360°rotation design.The cord can be wrap neatly into the base
bottom for easy storage. The concealed stainless steel heating element brings
fresh hot water with no metal Taste.
Soft Handle for easy using: Comfortable
stay-cool handle; brushed stainless steel finish. Cool-touch buttons and
ergonomic stay-cool handle.
Large Capacity for Multiple Cups: 1.8 L large
capacity, with Max. water level inside the kettle. almost 1.5x the size of most
tea makers. Brew up to 6oz at once! Perfect for small gatherings & parties!
Fully Stainless Steel Faster Boils: Stainless
Steel Interior cover with no plastic taste. Boils water rapidly, save more time
and energy. Faster than the microwave & safer than your traditional
stovetop teapot.
On/off switch with LED light.: Automatic
On/Off switch makes life easier. No need standing by for hot water. It shuts
down when reaches a full rolling boil. Boil-dry and overheat protection to
ensure the safety use.
Time Saver & Higher Safety: 1500 watts
energy efficient for quick heat-up time brings water to a boil, Fast boil, auto
shut off and boil dry protection technology with three-prong plug.
Brushed stainless steel housing
Applications
Making hot water for tea brewing.
Making Coffee.
Cool milk-tea.
Steaming eggs.
Any occation if you need hot water in short time.
Any
color of plastic is available to produce but in big quantity. Its
Electric Kettle,Stainless Steel Electric Kettle,Electric Boiler,Big Capacity Electric Kettle Guangzhou Taipeng Electrical Appliances Technology CO., LTD. , https://www.electrictaipeng.com
Practical Analysis of Neural Network for Machine Tool Structure Control System