DeviceNet-based weighing instrument

Abstract

A DeviceNet-based weighing instrument. The weighing instrument has the advantages of digitization, intelligentization and communicationization, realizes long distance, high speed, reliability, flexibility and low cost of an electronic belt scale control system, and improves metering performance. The DeviceNet-based weighing instrument comprises a power supply system module, a sensor input module, an analog output module, a Nixie tube display module, a keyboard interface and a DeviceNet bus communication interface, and is structurally characterized in that the sensor input module includes a weighing sensor and a speed sensor, collects a voltage signal, and amplifies the voltage signal through processing of an amplifier circuit of a signal conditioning circuit and photoelectric isolator; and the photoelectric isolator and a keyboard interface are connected with a single-chip microcomputer, an output end of the single-chip microcomputer is connected with a PWM output module, an LED display module and a DeviceNet processor, and the DeviceNet processor performs isolation and transceiving through a CAN bus.

Description

technical field The invention relates to an industrial instrument used for material measurement in the field of weighing instruments, in particular to a weighing instrument based on DeviceNet. Background technique Measuring instruments such as weighing devices are indispensable tools in material measurement. The mechanical lever scales used in the past can no longer meet the requirements of production automation and modern management. With the rise of sensors, electronic technology and microcomputer technology, weighing technology has developed rapidly. The application of weighing devices such as electronic belt scales has spread to many fields, and has achieved remarkable economic benefits. A single belt scale can be used as a simple weighing instrument. The batching system composed of multiple belt scales networked can be applied to the automatic production process. The communication between the belt scales and between the belt scales and the monitoring host becomes a ...

AI Technical Summary

Problems solved by technology

There are many kinds of weighing instruments in the prior art, almost all of which are ordinary single electronic weighing instruments, which cannot be networked and intelligentized. If the weighing instruments are required to communicate with each other, the desired effect cannot be achieved; for example, China Patent, the patent number is 201020046820.1, which discloses a weighing instrument, including a housing, a liquid crystal display and a light touch keyboard arranged on the front of the outer surface of the housing, a power socket arranged on the upper left side of the housing and switch, the wireless transmitting antenna and the paper outlet of the printer arranged on the right side of the housing, the power pack, the sensor data processing module, the main control board module, the RFID identification module, the wireless transmission module and the Label printing module

Images