FPGA-based (field programmable gate array-based) parallel detection method for thermal protectors in batches

Abstract

The invention discloses an FPGA-based (field programmable gate array-based) parallel detection method for thermal protectors in batches. The method includes the steps of initializing an FPGA, namely enabling chip selection, selecting normal on and normal off types of thermal protectors and zeroing stored data; allowing the FPGA to parallelly acquire switching states of the thermal protectors to generate flash features for representing the thermal protectors and switching data for asynchronous reset features; allowing the FPGA to analyze the switching data to obtain the flash features of the thermal protectors and the results of judgment on the asynchronous reset features, and storing the features and the results in the FPGA; allowing a microcontroller to read the switching states of the thermal protectors parallelly acquired by the FPGA in a cyclic scanning manner, judging action and reset of the thermal protectors, and controlling oven temperature curves, reading action temperature and reset temperature; after temperature rise and drop are complete in an oven according to the set temperature curves, allowing the microcontroller to read the flash features and the asynchronous reset feature judgment results stored in the FPGA.

Description

technical field [0001] The invention belongs to the field of signal detection, and in particular relates to a special detection method for batch detection of thermal protectors, and more particularly relates to a parallel detection method for batch thermal protectors based on FPGA. Background technique [0002] Thermal protector, also known as temperature switch or temperature relay, is a kind of thermal protection element made of bimetallic sheet, which is widely used in the protection circuit of various heating appliances such as motors and household appliances. It is divided into contact normally closed and normally open, among which the normally closed type has a large production capacity and is widely used. When the temperature rises to the operating temperature value, the bimetal sheet is heated to generate internal stress and act quickly, opening / closing the contact, realizing cutting / connecting the circuit, thereby playing a role of thermal protection. When the temp...

AI Technical Summary

Problems solved by technology

The existing data acquisition and detection methods that rely entirely on the speed of the microcontroller are difficult to accurately and reliably detect flashing products and reset out-of-sync products, and the integration level is low and the price is expensive

Images