CN202903312U

CN202903312U - Weighing device with wireless transmission function

Info

Publication number: CN202903312U
Application number: CN 201220560160
Authority: CN
Inventors: 郑争兵
Original assignee: Shaanxi University of Technology
Current assignee: Shaanxi University of Technology
Priority date: 2012-10-29
Filing date: 2012-10-29
Publication date: 2013-04-24
Anticipated expiration: 2022-10-29

Abstract

The utility model relates to the technical field of measuring tool products and in particular to a weighing device with wireless transmission function, wherein a single chip microcomputer is respectively connected with a weighing module, a clock module, a temperature detecting module, a GSM transmission module, a keyboard and an LED display screen. A weighing sensor is connected with an A/D conversion chip and is used for acquiring weighing data; the single chip microcomputer correspondingly processes the weighing data and transmits processed data to a GSM receiving module through the GSM transmission module; and a storage server and the GSM receiving module are connected via a serial communication interface. The weighing device has the function of remote weighing data backup, the weighing data can be wirelessly transmitted through the GSM transmission module to the storage server which records and backs up the weighing data so that the security of the data can be ensured, important weighing data can be prevented from being lost, and the data can be queried conveniently by a system. The weighing device is low in cost and convenient to operate, can be used to effectively improve the management efficiency of electronic weighing data and has good practical value in the weighing field.

Description

A kind of weighing device with wireless transmission function

Technical field

The utility model relates to the measurer product technical field, specifically a kind of weighing device with wireless transmission function.

Background technology

Electronic weighing device is electronic scale commonly used in the daily life, is widely used in supermarket, big-and-middle-sized market, logistics distribution center.Electronic weighing device has replaced traditional mechanical type weighing instrument take lever balance as principle in structure and principle.Compare traditional mechanical type weighing instrument, electronic weighing device has the weighing precision height, the advantages such as volume is little, applied range, easy operating use of installing, and all is brand-new measuring weighing instrument on profile layout, principle of work, structure and material.The design of electronic weighing device at first is to collect the weight of testee and convert thereof into voltage signal by LOAD CELLS.Output voltage signal is usually very little, needs to amplify the conversion with AD by the signal of high precision high-gain, converts in the single-chip microcomputer that digital quantity is fed to governor circuit to process, and passes through the Single-chip Controlling display again, thereby demonstrates the weight of testee.

And the integral level of electronic-weighing product is not high in the market, part small business poor product quality and lacking qualified technical personnel, and equipment is incomplete, lacks the development ability of product, and product quality is low-level.Therefore, develop targetedly cover electronic weighing device with practical value, overcome technically above-mentioned shortcomings, the weak point of electronic weighing device in application has realistic meaning.

Summary of the invention

For the deficiencies in the prior art, the purpose of this utility model provides a kind of weighing device with wireless transmission function, and it is easy to operate, uses simply, and product quality level is high, and extraordinary practical value is arranged.

The technical scheme that its technical matters that solves the utility model adopts is: a kind of weighing device with wireless transmission function, comprise LOAD CELLS, the A/D conversion chip, single-chip microcomputer, clock module, temperature detecting module, LED display, keyboard, the GSM sending module, the GSM receiver module, storage server, it is characterized in that: described single-chip microcomputer outer setting has LOAD CELLS, LOAD CELLS is connected with the A/D conversion chip, the A/D conversion chip is connected with single-chip microcomputer, on single-chip microcomputer, also be provided with clock module and temperature detecting module, be connected with keyboard and LED display curtain on the single-chip microcomputer, the GSM sending module is arranged on the single-chip microcomputer, the GSM sending module is connected with the GSM receiver module, and storage server is connected by serial communication interface with the GSM receiver module.

The beneficial effects of the utility model are:

1, electronic weighing device is because the precision of self is high, function is strong and easy to use, and the actual electronic weighing that uses is equipped with higher cost performance, can replace those mechanical instruments of weighing fully in a lot of fields.Should be according to user's desirability when concrete exploitation electronic weighing system, the coupling system hardware and software overlaps the great electronic weighing system of actual use value thereby can develop one again.At present, develop rapidly along with electronic technology, reaching its maturity of microprocessor applications technology, will advance based on microprocessor is being gradually improved of electronic weighing system function of core, therefore diversification smart electronics weighing system is with a wide range of applications and develops value, and small-range high-precision electronic weighing device has important application in many industries (such as bio-pharmaceuticals, jewelry transaction, chemical analysis etc.).

2, this utility model adopts the weighing data wireless transmission function, by Single-chip Controlling GSM sending module with weighing data transmission and store on the storage server, weighing data is backed up, guarantee the safety of data, prevented losing and can making things convenient for system queries of important weighing data.

Description of drawings

Fig. 1 is the utility model structural framing synoptic diagram.

Description of reference numerals: 1-LOAD CELLS; The 2-A/D conversion chip; The 3-single-chip microcomputer; The 4-clock module; The 5-temperature detecting module; The 6-LED display screen; The 7-keyboard; The 8-GSM sending module; The 9-GSM receiver module; The 10-storage server.

Embodiment

Below in conjunction with specific embodiment, further set forth the utility model, should be understood that these embodiment only are used for explanation the utility model and are not used in restriction scope of the present utility model.Should be understood that in addition those skilled in the art can make various changes or modifications the utility model after the content of having read the utility model instruction, these equivalent form of values drop on application appended claims limited range equally.

Fig. 1 is a kind of weighting device structure framework synoptic diagram with wireless transmission function of the utility model, comprise LOAD CELLS 1, A/D conversion chip 2, single-chip microcomputer 3, clock module 4, temperature detecting module 5, LED display 6, keyboard 7, GSM sending module 8, GSM receiver module 9, storage server 10, described single-chip microcomputer 3 outer setting have LOAD CELLS 1, LOAD CELLS 1 is connected with A/D conversion chip 2, A/D conversion chip 2 is connected with single-chip microcomputer 3, also be provided with clock module 4 and temperature detecting module 5 in single-chip microcomputer 3 outsides, be connected with keyboard 7 and LED display curtain 6 on the single-chip microcomputer 3, GSM sending module 8 is arranged on the single-chip microcomputer 3, GSM sending module 8 is connected with GSM receiver module 9, and storage server 10 and GSM receiver module 9 are connected by serial communication interface.

According to above design proposal, it is the control core parts that hardware components adopts 51 series monolithic AT89S52, realize the basic control function of weighing device, in a 8 of the AT89S52 with the microcontroller of 8KB program storage, consider when realizing the various functions of electronic weighing device with software, required software amount is not very large, do not need too large program's memory space, therefore need to be outside sheet to the AT89S52 actual design time extender storer again, so not only saved hardware resource, also optimized the design of circuit, the hardware components of system not only comprises the minimum system part take single chip computer AT 89S52 as core, but also comprises the weighing data collection, human-computer interaction interface, clock, temperature detection, the parts such as gsm wireless module and system power supply.

The weighing data collecting part is comprised of HL-8 type LOAD CELLS 1 and high-precision 24 A/D conversion HX711 chip, 2 parts.When concrete selection sensor, consider precision, the accuracy requirement of necessity when the weighing article, the weight error of alleged article must be controlled within certain scope.In addition because own wt, vibration and the impact component of weighing platform, and when avoiding object overweight to the damage of sensor, so when selecting sensor, will ensure certain load-bearing allowance, selected transducer range should be than requirement of system design large, and need to satisfy accuracy requirement, the error in the time of full scale can not be greater than ormal weight.LOAD CELLS HL-8 induction is exported faint millivolt magnitude voltage signals by measuring gravity.This voltage signal is nursed one's health conversion through high-precision analog/digital converter chip HX711 to sensor signal.The HX711 chip is by 2 line serial mode and single chip communications.Single-chip microcomputer reads measured data, carries out computing and shows data in LCD display 6.

The keyboard 7 of man-machine interaction part can input digit and the control command of having fixed etc. in system.We adopt 4*4 matrix keyboard 7 commonly used in current design.Show usefulness LCD display 6 we selected as requested 128*64 Chinese character screen JLX12864G liquid crystal display.Three frequency/four that GSM sending module and GSM receiver module employing Simcom company release are GSM/GPRS module SIM300 frequently.Since the inner integrated ICP/IP protocol stack of SIM300, and expanded TCP/IP AT instruction, can be very easy to utilize this Development of Module radio data-transmission equipment.Communicate by letter between single-chip microcomputer 3 and the SIM300 module in the system and realize by serial ports, adopt MAX232 as the level shifting circuit of serial communication, realize the Serial Communication Function of data.The clock part of expansion mainly realizes that by clock chip DS1302 design temperature detection part is mainly realized by temperature sensor DS18B20.

Claims

1. weighing device with wireless transmission function, comprise LOAD CELLS, the A/D conversion chip, single-chip microcomputer, clock module, temperature detecting module, LED display, keyboard, the GSM sending module, the GSM receiver module, storage server, it is characterized in that: described single-chip microcomputer outer setting has LOAD CELLS, LOAD CELLS is connected with the A/D conversion chip, the A/D conversion chip is connected with single-chip microcomputer, on single-chip microcomputer, also be provided with clock module and temperature detecting module, be connected with keyboard and LED display curtain on the single-chip microcomputer, the GSM sending module is arranged on the single-chip microcomputer, the GSM sending module is connected with the GSM receiver module, and storage server is connected by serial communication interface with the GSM receiver module.