CN201282555Y

CN201282555Y - Automatic mensuration detection circuit of mobile phone loudspeaker

Info

Publication number: CN201282555Y
Application number: CNU2008201427964U
Authority: CN
Inventors: 赵志平; 叶新华; 徐炳烈
Original assignee: Tianjin Samsung Electronics Co Ltd
Current assignee: Tianjin Samsung Electronics Co Ltd
Priority date: 2008-10-30
Filing date: 2008-10-30
Publication date: 2009-07-29
Anticipated expiration: 2018-10-30

Abstract

The utility model relates to an automatic determination and detection circuit for the loudspeakers of cell phones. The detection circuit thereof comprises a single-chip and two phonation circuits of a loudspeaker; the phonation circuit of the loudspeaker comprises two symmetric audio amplifier circuits; signals are output via the loudspeaker after being amplified by the audio amplifier circuits; wherein, one circuit is connected with a standard loudspeaker, and the other circuit is connected with the loudspeaker to be detected, and the structures of the two audio amplifier circuits are symmetrical. The automatic determination and detection circuit has the advantages that the loudness of the sound signals of the loudspeaker to be detected can be determined explicitly, the operation is simple, determination can be realized by pressing the button SW2 instead of starting the loop repeatedly and the circuit can be extended to a loop detected by a plurality of loudspeakers simultaneously so as to improve the detection efficiency, and have popularization value.

Description

Mobile phone speaker is measured testing circuit automatically

Technical field

The utility model relates to the loud speaker detection technique, and particularly a kind of mobile phone speaker is measured testing circuit automatically.

Background technology

In the mobile phone technique field, loud speaker (speaker) sound detection is an important procedure, and checkout equipment and method play crucial effects to testing result, the continuous release of new product, requirement to checkout equipment also improves constantly, and checkout equipment and detection method also will be brought in constant renewal in; For example, the video reproduction tone-off of loud speaker often appears in Samsung product DX100, Dragon4, MX20, and the little situation of loud speaker video reproduction sound, and at present technology and equipment lacks the little degree of loud speaker sound is carried out clear and definite decision method; Therefore, the new method that the little degree of loud speaker sound is measured, new technology space that development is arranged.

Summary of the invention

The purpose of this utility model is exactly to be improvement the deficiencies in the prior art part, and the automatic assay method of mobile phone speaker that provides a kind of employing that tested speaker (loud speaker) PB tone signal is carried out quantitative determination reaches with monolithic processor controlled testing circuit.

The utility model is achieved in that mobile phone speaker measures testing circuit automatically, and it is characterized in that: described testing circuit comprises single-chip microcomputer and two-way loud speaker phonation circuit; The loud speaker phonation circuit is made of the sound discharge road of two-way symmetry, amplifies through sound discharge road, and again by loud speaker output, wherein one tunnel loud speaker that connects is a standard loudspeakers, and the loud speaker that another road connects is a tested speaker; Two-way sound discharge line structure symmetry; Wherein one tunnel loud speaker that connects is a standard loudspeakers, and the loud speaker that another road connects is a tested speaker; Two-way sound discharge line structure symmetry; Singlechip chip adopts 80C51, by crystal oscillator, two clock circuits that electric capacity constitutes, inserts XTAL1, the XTAL2 pin of singlechip chip; Switch SW 1, electric capacity, resistance constitute reset circuit, insert the RST pin of singlechip chip; Switch SW 2, resistance constitute interrupt requests input control end, insert the P3.2/INT0 pin of singlechip chip; P0.0～P0.3 by singlechip chip draws respectively, and pin P0.0, the P0.3 of singlechip chip connects the two-way loud speaker sounding loop of symmetry respectively; The P0.0 link circuit of singlechip chip is by slide rheostat, and signal is delivered to amplifier and amplified, and amplifier adopts LM386, and amplifier connects electric capacity, and output audio signal is given tested speaker; The P0.3 link circuit of singlechip chip is by slide rheostat, and signal is delivered to amplifier U2 and amplified, and amplifier adopts LM386, and amplifier connects electric capacity, and output audio signal is given standard loudspeakers.

The utility model has the advantages that: the large and small degree of the voice signal of tested speaker (speaker) is carried out clear and definite judgement; Simple to operate, do not need the repeated priming loop, only need press button SW2 and can measure, circuit can expand to the loop that a plurality of loud speakers (speaker) are measured simultaneously, improves detection efficiency, has promotional value.

Description of drawings

Fig. 1, the utility model test circuit structure block diagram and as Figure of abstract.

Fig. 2, the utility model test circuit figure.

Embodiment

Below in conjunction with accompanying drawing the utility model is further elaborated.

With reference to Fig. 1,2, singlechip chip adopts 80C51, by the clock circuit that crystal oscillator X1, capacitor C 9, C10 constitute, inserts TAL1 and the TAL2 pin of 80C51; Switch SW 1, capacitor C 11, resistance R 5 constitute reset circuit, insert the RST pin of 80C51; Switch SW 2, circuit R6 constitute interrupt requests input control end, insert the P3.2/INT0 pin of 80C51;

P0.0～P0.3 by 80C51 draws respectively, and P0.0 and P0.3 connect the two-way loud speaker sounding loop of symmetry respectively;

The loud speaker sounding loop 1 of drawing with the P0.0 by 80C51 is an example: the P0.0 link circuit is by slide rheostat RV1, and signal is delivered to amplifier S1 (LM386) and amplified, and S1 (LM386) connects capacitor C 4, and output audio signal is given tested speaker LS1; Circuit also comprises R1, C1, C2, C3; This loop is identical with structure, components and parts model, the value in the loud speaker sounding loop 2 that P0.3 by 80C51 draws; The P0.3 link circuit is by slide rheostat RV2, and signal is delivered to amplifier U2 (LM386) and amplified, and US1 (LM386) connects capacitor C 8, and output audio signal is given standard loudspeakers LS2.

The P0.1 of 80C51 and P0.2 meet LED1, LED2 respectively;

The trace routine that writes the single-chip microcomputer internal memory is worked out by following flow process:

Defined variable;

The definition modulator;

The value most-significant byte of the T0 that in interruption, loads;

The value least-significant byte of the T0 that in interruption, loads;

The value most-significant byte of the T1 that in interruption, loads;

The value least-significant byte of the T1 that in interruption, loads;

LED1 begins bright;

Call in pre-timing value;

Negate, music output IO;

LED2 begins bright;

Call in pre-timing value;

Negate, music output IO;

Low level down trigger pattern;

Open and interrupt 1, wait for that operating personnel press button 2;

Interruption is opened, and connects high level to it in the actual loop;

External interrupt 0;

Go to tremble time-delay, prevent because key jitter makes repeated interruptions use 16 mode of operations of timer 0;

To initial value;

Timer 0 picks up counting;

Put the value of a note;

Sound delay;

Note is played and is finished, and timer 0 cuts out;

LED1 closes;

Time-delay between two loud speakers are measured;

Use 16 mode of operations of timer 1;

Timer 1 picks up counting;

Put the value of a note;

Sound delay; Note is played and is finished, and timer 1 cuts out; LED2 closes.

Operating process:

Behind the closed SW1 (slide switch), Single Chip Microcomputer (SCM) system begins to start, and carries out initialization simultaneously;

Tested speaker loud speaker (speaker elements of mobile phone or DV etc.) is inserted the mensuration circuit interface;

After pressing SW2 (S/W), measure:

1) loud speaker sounding to be measured is played: all take rice, LED1 is bright simultaneously, and after sounding finished, LED1 went out;

2) time-delay certain hour (can freely set), standard loudspeakers (built-in) beginning sounding then;

3) the standard loudspeakers sounding is played: all take rice, LED2 is bright simultaneously, and after sounding finished, LED2 went out.

According to front and back loud speaker phonation volume and tonequality situation, the sound of loud speaker to be measured and standard loudspeakers is compared during mensuration, thereby whether judge non-defective unit.

Claims

1. a mobile phone speaker is measured testing circuit automatically, it is characterized in that: described testing circuit comprises single-chip microcomputer and two-way loud speaker phonation circuit; The loud speaker phonation circuit is made of the sound discharge road of two-way symmetry, amplifies through sound discharge road, and again by loud speaker output, wherein one tunnel loud speaker that connects is a standard loudspeakers, and the loud speaker that another road connects is a tested speaker; Two-way sound discharge line structure symmetry; Singlechip chip adopts (80C51), by the clock circuit that crystal oscillator (X1), electric capacity (C9, C10) constitute, inserts (XTAL1, XTAL2) pin of singlechip chip; Switch (SW1), electric capacity (C11), resistance (R5) constitute reset circuit, insert (RST) pin of singlechip chip; Switch (SW2), resistance (R6) constitute interrupt requests input control end, insert (P3.2/INTO) pin of singlechip chip; Respectively by singlechip chip (P0.0～P0.3) draw, the pin of singlechip chip (P0.0, P0.3) connect respectively the symmetry two-way loud speaker sounding loop; (P0.0) link circuit of singlechip chip is by slide rheostat (RV1), and signal is delivered to amplifier (S1) and amplified, and amplifier adopts (LM386), and amplifier (S1) connects electric capacity (C4), and output audio signal is given tested speaker (LS1); (P0.3) link circuit of singlechip chip is by slide rheostat (RV2), and signal is delivered to amplifier (U2) and amplified, and amplifier (U2) adopts (LM386), and amplifier (U2) connects electric capacity (C8), and output audio signal is given standard loudspeakers (LS2).