CN203148559U - Novel intelligent weighing system - Google Patents

Abstract

A novel intelligent weighing system relates to an intelligent electronic weighing device, specifically a high-precision intelligent electronic weighing device controlled by a single-chip microcomputer and capable of wireless communication. It solves the weighing function and numerical display we need in public places, and at the same time solves the problem that in practical applications, when the load exceeds the required range, it cannot provide an overload alarm and remotely complete the weighing range setting. The utility model consists of a single-chip microcomputer main control circuit (1), which is characterized in that: the weighing sensor (7) is connected to the amplifying circuit (6), and the described amplifying circuit is connected with the single-chip microcomputer main control circuit (1). The main control circuit of the single-chip microcomputer described above is respectively connected with the wireless receiving circuit (5), the reset circuit (4), the alarm circuit (3), and the display circuit (2). The utility model is used for weighing.

Description

A New Type of Intelligent Weighing System

technical field

The utility model relates to a high-precision intelligent electronic weighing system capable of wireless communication. the

Background technique

As a means of measurement, weighing technology is widely used in various fields such as industry and agriculture, scientific research, transportation, domestic and foreign trade, etc., and is closely connected with people's lives. With the development of society, the old-fashioned weighing system used in the past can no longer meet the requirements of production automation and management modernization, and the wide application of microcontroller technology and sensor technology makes the single-chip microcomputer as the core control unit, coupled with weighing sensors , keyboard, display circuit and wireless communication module, the intelligent weighing system is more and more widely used. The intelligent weighing system is not only accurate, fast and convenient, but also wireless communication, digital display, and intelligent alarm, which have an impact on people's lives. Bigger and bigger and wildly popular. the

Contents of the invention

The purpose of this utility model is to solve the weighing and numerical display functions required in public places, and at the same time solve the problem that in practical applications, when the weight of the load exceeds the required range, it is impossible to provide overload alarm and remotely complete the weighing range setting The problem. In order to solve these problems, it is necessary to design a new type of intelligent weighing system. the

The above-mentioned purpose is achieved through the following technical solutions: a new type of intelligent weighing system, which consists of: a load cell, an amplifier circuit, a single-chip main control circuit, a wireless receiving circuit, a reset circuit, an alarm circuit, and a display circuit. It is characterized in that: The weighing sensor is connected with an amplifying circuit, and the amplifying circuit is connected with the main control circuit of the single-chip microcomputer, and the main control circuit of the single-chip microcomputer is respectively connected with the wireless receiving circuit, the reset circuit, the alarm circuit, and the display circuit. the

Beneficial effects: 1. The utility model collects the weight of the measured object through the weighing sensor and converts it into a voltage signal. Since the voltage signal is usually very small, it needs to be linearly amplified by the amplification circuit. The amplified voltage signal is converted into a digital quantity through the A/D conversion interface of the main control circuit of the single-chip microcomputer and sent to the main control circuit of the single-chip microcomputer, and then the liquid crystal display is controlled by the single-chip microcomputer. , so as to accurately display the weight of the measured object. When the weight of the measured object exceeds the set value, the system can automatically alarm; the wireless receiving module can also receive the set value of the weight measurement range sent from the remote end to change the scale. heavy range. the

2. The high-precision intelligent electronic scale of the utility model is small in size, accurate in measurement, and easy to carry. It integrates weighing functions and remote communication functions, and can meet the needs of commercial trade and residential households. the

Description of drawings:

Fig. 1 is a structural diagram of the utility model; Fig. 2 is a circuit structure diagram of the utility model.

Detailed ways:

Example 1: As shown in Figure 1, a new type of intelligent weighing system consists of: single-chip main control circuit (1), display circuit (2), alarm circuit (3), reset circuit (4), wireless receiving Circuit (5), amplifying circuit (6), load cell (7), the load cell (7) is connected to the amplifying circuit (6), and the amplifying circuit is connected to the single chip microcomputer main control circuit (1), the The main control circuit of the single-chip microcomputer is respectively connected with the wireless receiving circuit (5), the reset circuit (4), the alarm circuit (3), and the display circuit (2). 

The weighing signal output end of the weighing sensor is connected to the weighing signal input end of the amplifying circuit, the weighing signal output end of the amplifying circuit is connected to the weighing signal input end of the single-chip main control circuit, and the reset signal output end of the reset circuit is connected to the single-chip main control circuit. The reset signal input end of the control circuit, the weighing range signal output end of the wireless receiving circuit is connected to the weighing range signal input end of the single-chip main control circuit, the alarm signal output end of the single-chip main control circuit is connected to the alarm signal input end of the alarm circuit, and the single-chip microcomputer The weighing display signal output terminal of the main control circuit is connected with the weighing display signal input terminal of the display circuit.

As shown in accompanying drawing 2, the load cell described in the present embodiment is made of an electric bridge composed of four resistance strain gauges R5-R8, and the output ends of the electric bridge are connected to the weighing signal input end of the amplifying circuit; The amplifying circuit is composed of an integrated operational amplifier module model OP07 and peripheral resistors. The pin 4 of the integrated operational amplifier module OP07 is connected to the power supply VCC, and the pin 7 is connected to the power supply -VCC. The weighing signal output end of the heavy sensor is connected, and the pin 6 of the integrated operational amplifier module OP07 is connected to the weighing signal input end of the single-chip microcomputer main control circuit; Pin 9 of (U1) is connected to the RSTK dial switch of the reset circuit, pins 11 and 31 of the single-chip microcomputer chip (U1) are connected to ground, pin 32 of the single-chip microcomputer chip (U1) is connected to a capacitor and then connected to VCC, and the pin of the single-chip microcomputer chip (U1) Pins 10 and 30 are connected to VCC, pin 5 of the single-chip microcomputer chip (U1) is connected to the EN effective signal output terminal of the wireless receiving circuit, pin 1 of the single-chip microcomputer chip (U1) is connected to the antenna T2 pin of the wireless receiving circuit, and the single-chip microcomputer chip (U1) ) pin 2 is connected to the antenna T1 pin of the wireless receiving circuit, pin 3 of the single-chip microcomputer chip (U1) is connected to the RXD serial port input of the wireless receiving circuit, and pin 4 of the single-chip microcomputer chip (U1) is connected to the TXD serial port output of the wireless receiving circuit Pin 21 of the single-chip microcomputer chip (U1) is connected to the signal input pin of the alarm circuit, pin 39 of the single-chip microcomputer chip (U1) is connected to the register selection input terminal of the display circuit, and pin 38 of the single-chip microcomputer chip (U1) is connected to the display circuit. Read/write selection input terminal, the pin 37 of the single-chip microcomputer chip (U1) is connected to the serial/parallel selection input terminal of the display circuit, the data output pins 22-29 of the single-chip microcomputer chip (U1) are connected to the data input terminal of the display circuit, the single-chip microcomputer chip The pin 40 of (U1) is connected to the weighing signal output end of the integrated operational amplifier module OP07 of the amplifying circuit; the wireless receiving circuit adopts RFID wireless radio frequency (U2), and the pin 1 of the wireless radio frequency module (U2) is connected to VCC, wireless Pin 2 of the radio frequency module (U2) is connected to the antenna, pin 8 of the radio frequency module (U2) is connected to the ground, pin 7 of the radio frequency module (U2) is connected to pin 3 of the microcontroller chip (U1), and the radio frequency module ( Pin 6 of U2) is connected to pin 4 of the single-chip microcomputer chip (U1), pin 5 of the wireless radio frequency module (U2) is connected to pin 5 of the single-chip microcomputer chip (U1), pin 4 of the wireless radio frequency module (U2) is connected to the single-chip microcomputer chip (U1) ), the pin 1 of the wireless radio frequency module (U2) is connected to the pin 2 of the single-chip microcomputer chip (U1); The pin 9 of the chip (U1) is connected to control the reset of the total system; the alarm circuit is composed of a buzzer, a transistor Q1 and a resistor R1, the alarm circuit The alarm signal input terminal is connected to pin 21 of the single-chip microcomputer chip (U1); the display circuit adopts a liquid crystal display module (U3) of model 12864, and pin 1 and pin 20 of the liquid crystal display module (U3) are connected to the ground, pin 2, Pin 6, pin 17 and pin 19 are connected to VCC, pin 3 is connected to a 10K adjustable resistor, and pin 7-14 of the liquid crystal display module (U3) is connected to pin 22-29 of the single-chip microcomputer chip (U1). the

work process:

First, the weight of the object to be weighed is converted into an electrical signal proportional to the weight of the object to be weighed by the load cell. This signal is transmitted to the A/D interface of the main control circuit of the single-chip microcomputer through the amplifying circuit. After calculation, the main control circuit of the single-chip microcomputer The control circuit transmits a display signal to the display circuit. If the weight to be weighed exceeds the preset maximum value, the main control circuit of the single-chip microcomputer transmits an alarm signal to the alarm circuit. The weight setting value transmitted from the remote end is received through the wireless receiving module, which solves the problem of changing the weighing range remotely.

Claims (1)

1. A novel intelligent weighing system, its composition comprises: weighing sensor, amplifying circuit, single-chip microcomputer main control circuit, wireless receiving circuit, reset circuit, alarm circuit, display circuit, it is characterized in that: described weighing sensor connects Amplifying circuit, the amplifying circuit is connected with the main control circuit of the single-chip microcomputer, and the main control circuit of the single-chip microcomputer is respectively connected with the wireless receiving circuit, the reset circuit, the alarm circuit and the display circuit.

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