CN201016801Y

CN201016801Y - Voice electronic scale

Info

Publication number: CN201016801Y
Application number: CNU2006200293728U
Authority: CN
Inventors: 张振宇; 任胜男; 王君; 凌振宝
Original assignee: Jilin University
Current assignee: Jilin University
Priority date: 2006-09-21
Filing date: 2006-09-21
Publication date: 2008-02-06
Anticipated expiration: 2016-09-21

Abstract

The utility model relates to a weighing device which can indicate the weight, in particular to a voice electronic balance which can report the weight in voice; the utility model consists of a cantilever beam emergency sensor, an amplifying circuit, a voice reporting circuit, a liquid crystal display and a loudspeaker; the voice reporting circuit consists of a DAC 1 and a D3C1 of an SCM which are connected. The voice reporting circuit consists of the loudspeaker and a driving circuit. After the detected object is placed on the tray of a weighing sensor, the electronic balance displays the weight on the liquid crystal display and at the same time the weight, unit price and total price can be reported in voice by the loudspeaker. The utility model is characterized by a simple structure and a low cost and the electronic balance is more practical with the utility model.

Description

The speech electronic scale

Technical field

The utility model relates to a kind of weight-measuring device of directing object weight, especially can carry out the weighing device of voice broadcast.

Background technology

Electronic scales is a kind of weighing apparatus of important Measuring Object weight commonly used.At present, to be the weighing article be converted to weight the simulating signal of voltage or electric current via being contained in weight sensor in the weighing mechanism with known electronic scales, after amplification and Filtering Processing, be converted to digital signal by the A/D processor, digital signal is by central processing unit (CPU) calculation process, and peripheral needed function and various interface circuit also are connected with CPU, are shown with digital form by display screen at last.But, electronic scale in the past lacks sound prompt function, numeral shows the requirement that is not well positioned to meet the user in a lot of application scenarios, such as the measuring operation under the more weak environment of light, for another example in the market weighing apparatus from client at a distance, or the user wants to learn in position far away the measuring operation of measurement result.These have all illustrated some limitation that single numeral shows in the existing electronic scale.

Summary of the invention

The purpose of this utility model is presented at the deficiency in the actual measurement with regard to being numeral at existing electronic scales, when measuring the weight of testee, the weight that can not only screen display goes out testee, and the speech electronic scale that can easily institute's check weighing amount be reported in real time.

The purpose of this utility model realizes in the following manner:

Be provided with voice broadcast circuit 4, voice broadcast circuit 4 connects and composes by the D3C1 of DAC1 and single-chip microcomputer.

The purpose of this utility model can also realize in the following manner:

Voice broadcast circuit 4 is to be made of loudspeaker and driving circuit.

The beneficial effects of the utility model are, when measuring testee weight, can not only demonstrate the weight of testee, and can be easily the operating process and the result of check weighing amount be reported in real time, have simple in structure, lower-cost characteristics.

Description of drawings

Fig. 1 is a circuit overall block-diagram of the present utility model.

Fig. 2 is single-chip microcomputer and voice broadcast circuit 4 and peripheral circuit diagram thereof.

Fig. 3 is semi-girder strain gauge transducer and amplification circuit diagram.

Fig. 4 is the pin connection layout of LCD.

1 semi-girder strain-type load cell, 2 amplifying circuits, 3 LCD, 4 voice broadcast circuit, 5 single-chip microcomputers.

Embodiment

Below by embodiment with in conjunction with the accompanying drawings the utility model is described in further detail:

Be provided with voice broadcast circuit 4, voice broadcast circuit 4 connects and composes by the D3C1 of DAC1 and central processing unit.Voice broadcast circuit 4 is to be made of loudspeaker and driving circuit.

The output of amplifying circuit 2 is connected to the IOA3 pin of single-chip microcomputer 5.The eight bit data end D0 to D7 of LCD 3 is connected to IOB0 to the IOB7 pin of single-chip microcomputer 5 respectively, three control end RS of LCD 3, and R/W, EN are connected to the IOB13 of single-chip microcomputer 5 respectively, IOB14, IOB15 pin.Testee is placed on the semi-girder strain-type load cell 1, on two output lines of load cell 1, just produced faint voltage differential signal like this, this voltage signal is through behind the amplification of amplifying circuit 2, be sent in the analog to digital converter of single-chip microcomputer 5, calculation process through central processing unit, the weight that will on external LCD 3, show testee, result is given voice broadcast circuit 4 by the digital to analog converter output channel of Ling Yang single-chip microcomputer 5 simultaneously, by the weight of loudspeaker to testee, unit price, overall quotation carries out voice broadcast.

An output line of semi-girder strain-type load cell is connected to the in-phase input end of amplifier in the differential amplifier circuit, another root output line links to each other with amplifier's inverting input, the output terminal of amplifier is connected to the input pin of the analog to digital converter of Ling Yang single-chip microcomputer, LCD is connected with the IOB mouth of Ling Yang single-chip microcomputer with three control lines by eight data lines, the loudspeaker of voice output then are connected on the passage of Ling Yang single-chip microcomputer digital to analog converter by driving circuit, thereby finish the function of voice broadcast.After system's power supply, testee is placed on the pallet of semi-girder strain-type load cell, then on two output lines of sensor, just can produce faint signal difference, after amplifying circuit amplifies, the voltage signal of output is sent in the analog to digital converter to be changed, the weight that after single-chip microcomputer is handled, can on LCD, show testee, by the loudspeaker on the digital to analog converter passage weight of testee is reported simultaneously, reach the dual expression of detection information like this by liquid crystal display and voice broadcast, be presented at deficiency in the actual measurement thereby solved single numeral.When being programmed, the Ling Yang single-chip microcomputer operating process and the result of electronic scale check weighing amount can also be carried out voice suggestion, for example prompting " begin measure ", " overweight ", " please marquis " slightly, " present weight is * * kilogram * * gram ", " price is a * * unit * angle * branch ", etc.

Claims

1. speech electronic scale, by load cell, amplifying circuit, central processing unit, numeral shows that the power supply parts connect to form, it is characterized in that be provided with voice broadcast circuit (4), voice broadcast circuit (4) connects and composes by the D3C1 of DAC1 and single-chip microcomputer.

2. speech electronic scale according to claim 1 is characterized in that, voice broadcast circuit (4) is to be made of loudspeaker and driving circuit.