CN1219282C - Wide-area audio amplifying method and equipment - Google Patents

Wide-area audio amplifying method and equipment Download PDF

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Publication number
CN1219282C
CN1219282C CN 01104576 CN01104576A CN1219282C CN 1219282 C CN1219282 C CN 1219282C CN 01104576 CN01104576 CN 01104576 CN 01104576 A CN01104576 A CN 01104576A CN 1219282 C CN1219282 C CN 1219282C
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China
Prior art keywords
loudspeaker
producing component
sensing elements
voice signal
wide
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Expired - Fee Related
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CN 01104576
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Chinese (zh)
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CN1369875A (en
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苏庚癸
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Tang Shijie
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Abstract

The present invention relates to a wide-area sound amplifying method and equipment thereof. The wide-area sound amplifying method is characterized in that the positive pole output end and the negative pole output end of a main amplifier of a sound amplifying host machine are connected through a signal current generating current to form a closed loop; current induction elements which can induce signals transmitted by the closed loop and are respectively arranged on amplifiers which are used for outputting sound signals are used to match with the closed loop so as to induce and transmit the sound signals of the closed loop, and the sound signals are output by the amplifiers. In this way, transmission signals in the closed loop can remain stable, and the signal intensity induced by all the amplifiers is identical; besides, reliable transmission can be achieved, and a sound playing range can be infinitely expanded.

Description

The wide-area audio amplifying device
Technical field the present invention relates to a kind of public address set.
Background technology as shown in Figure 1, general public address system is with main frame 11 output sounds that amplify, the described main frame 11 output terminal parallel connections that amplify are provided with an impedance matching network 13 and are made up of in the series and parallel mode several loudspeaker 131.In addition, for the broadcast quality that makes each loudspeaker 131 all meets necessary requirement, therefore also be provided with a transformer 112 that can promote output impedance in main amplifier 111 in the described main frame 11 that amplifies, so as to improving the output voltage of the main frame 11 that amplifies simultaneously, for each loudspeaker 131 action.
There is shortcoming in above-mentioned existing general public address system when reality is used:
1. the impedance matching network 13 owing to general public address system directly is connected with in the output terminal of the main frame 11 that amplifies, for reaching best power delivery, so the impedance of main frame 11 output terminals that amplify must equate with impedance matching network 13 resulting impedances of load end, otherwise the power transfer of the main frame that amplifies certainly output will be had a greatly reduced quality, thereby the impedance design that causes impedance matching network 13 is tending towards complicated, also because of the too many impedor of load end series and parallel of the main frame 11 that amplifies, cause the frequency response of audio frequency can produce relaxation phenomenon, and then influence broadcast quality.
2. because the output power that the same main frame 11 that amplifies is had is a definite value, for realizing described best power transmission, the impedance of main frame 11 output terminals that amplify in the general public address system must be complementary with impedance matching network 13 resulting impedances of load end.Cause the user in selecting for use when amplifying main frame 11, must consider that the series and parallel of each loudspeaker 131 is arranged and shared general power.In case impedance matching network 13 designs are finished, the resulting impedance of promptly representing described impedance matching network 13 is complementary with the main frame 11 that amplifies, the position of each loudspeaker 131 and quantity are all fixing, cause loudspeaker 131 quantity to set up arbitrarily, in case set up to some extent then will cause impedance no longer to mate, and the output power of the main frame 11 that amplifies is not also applied required, so generally public address system is under same main frame 11 operations that amplify, loudspeaker 131 quantity of its composition are restricted.
3. when the loudspeaker quantity in the needs increase impedance matching network 1, must replace the described main frame 11 that amplifies, cause high construction cost with other one main frame that amplifies.
The summary of the invention the technical problem to be solved in the present invention is to avoid above-mentioned the deficiencies in the prior art part and proposes a kind ofly to be convenient to expand the broadcast scope, can reduce the wide-area audio amplifying device that expands broadcast scope equipment cost.
The present invention solve the technical problem can be by realizing by the following technical solutions:
Design, use and also to comprise identical with loudspeaker quantity and the loudspeaker described main frame polyphone that amplifies, this each loudspeaker includes input port, marking current producing component, current sensing elements and amplifier;
Described each micropkonic input port receives the voice signal from the described main frame that amplifies; Described marking current producing component is electrically connected with described input port so that voice signal passes through this marking current producing component; Described current sensing elements and described marking current producing component neighbour put, and when voice signal during by described marking current producing component, described current sensing elements produces the induction voice signal; Described amplifier is electrically connected with described current sensing elements, and described induction voice signal amplifies after the output of described loudspeaker through described amplifier.
Compare with prior art, technique effect of the present invention is:
Since the voice signal of the main frame output of amplifying only by each micropkonic marking current producing component, thereby the distortion of voice signal can reduce to minimum, voice signal is able to stable transfer;
2. because wide-area audio amplifying device of the present invention utilizes each micropkonic current sensing elements to produce the induction voice signal, described micropkonic quantity can change according to user's demand, so the present invention can provide wide broadcast scope.
3. how many loudspeakers the present invention no matter use, the resistance matching problem of output terminal and each loudspeaker input end of the main frame of all needn't considering to amplify, thereby when micropkonic quantity increase, the main frame that amplifies does not need replacement, reduces equipment cost greatly.
Description of drawings
Fig. 1 is the synoptic diagram of existing general public address system;
Fig. 2 is the circuit diagram of first embodiment of wide-area audio amplifying device of the present invention;
Fig. 3 is the circuit diagram of second embodiment of wide-area audio amplifying device of the present invention;
Fig. 4 is the loudspeaker synoptic diagram of second embodiment of wide-area audio amplifying device of the present invention.
Embodiment is described in further detail below in conjunction with the most preferred embodiment shown in the accompanying drawing.
As shown in Figure 2, according to first embodiment of the invention, wide-area audio amplifying device 3 comprises the main frame 31 that amplifies, a plurality of loudspeaker 32.
Output terminal 310 output sound signals of the described main frame 31 that amplifies.
Described each loudspeaker 32 is in parallel with the main frame 31 that amplifies.Each loudspeaker 32 comprises input end 320, marking current producing component 324, current sensing elements 323, amplifier 322, loudspeaker 333 and housing 321.The voice signal that input end 320 receives from the main frame 31 that amplifies.Described marking current producing component 324 and described input end 320 are electrically connected so that voice signal passes through, and for example described marking current producing component 324 can be a lead, and these lead two ends are connected with the positive and negative electrode of described input port.Described current sensing elements 323 is put with described marking current producing component 324 neighbours, and when voice signal during by described marking current producing component 324, described current sensing elements 323 produces the induction voice signals.In the present embodiment, described current sensing elements 323 is iron core winding arounds, be arranged in parallel with described marking current producing component.Described amplifier 322 is electrically connected with described current sensing elements 323, and described induction voice signal amplifies after 333 outputs of described loudspeaker through described amplifier 322.Described marking current producing component 324, described current sensing elements 323, described amplifier 322 and described loudspeaker 333 all are contained in the described housing 321.
Second embodiment of the present invention as shown in Figure 3 and Figure 4, this embodiment is the change on first embodiment basis.In the present embodiment, the wide-area audio amplifying device comprise one amplify main frame 41 and with a plurality of loudspeakers 42 of its polyphone.Each loudspeaker 42 comprises an output terminal 420, marking current producing component 424, is the current sensing elements 423 of iron core winding around, amplifier 422, loudspeaker 433 and housing 421.Different with first embodiment is, as shown in Figure 4, iron core winding around 423 is annulars, and described marking current producing component 424 is placed through described annular core 423 central authorities, and vertical with these iron core 423 residing planes.

Claims (6)

1. a wide-area audio amplifying device comprises amplify a main frame and more than one loudspeaker, it is characterized in that:
Also comprise the loudspeaker of identical with loudspeaker quantity and the described main frame polyphone that amplifies, this each loudspeaker includes input port, marking current producing component, current sensing elements and amplifier;
Described each micropkonic input port receives the voice signal from the described main frame that amplifies; Described marking current producing component is electrically connected so that voice signal passes through with described input port; Described current sensing elements and described marking current producing component neighbour put, and when voice signal during by described marking current producing component, described current sensing elements produces the induction voice signal; Described amplifier is electrically connected with described current sensing elements, and described induction voice signal amplifies after the output of described loudspeaker through described amplifier;
Described current sensing elements is the iron core winding around, be arranged in parallel with described marking current producing component.
2. wide-area audio amplifying device as claimed in claim 1 is characterized in that: described each loudspeaker also includes housing, and described marking current producing component, described current sensing elements, described amplifier and described loudspeaker all are contained in this housing.
3. wide-area audio amplifying device as claimed in claim 1 is characterized in that: described marking current producing component is a lead, and these lead two ends are connected with the positive and negative electrode of described input port.
4. a wide-area audio amplifying device comprises amplify a main frame and more than one loudspeaker, it is characterized in that:
Also comprise the loudspeaker of identical with loudspeaker quantity and the described main frame polyphone that amplifies, this each loudspeaker includes input port, marking current producing component, current sensing elements and amplifier;
Described each micropkonic input port receives the voice signal from the described main frame that amplifies; Described marking current producing component is electrically connected with described input port so that voice signal passes through this marking current producing component; Described current sensing elements and described marking current producing component neighbour put, and when voice signal during by described marking current producing component, described current sensing elements produces the induction voice signal; Described amplifier is electrically connected with described current sensing elements, and described induction voice signal amplifies after the output of described loudspeaker through described amplifier;
Described current sensing elements is the iron core winding around, and this iron core is an annular, and described marking current producing component is placed through described annular core central authorities, and vertical with the residing plane of this iron core.
5. wide-area audio amplifying device as claimed in claim 4 is characterized in that: described each loudspeaker also includes housing, and described marking current producing component, described current sensing elements, described amplifier and described loudspeaker all are contained in this housing.
6. wide-area audio amplifying device as claimed in claim 1 is characterized in that: described marking current producing component is a lead, and these lead two ends are connected with the positive and negative electrode of described input port.
CN 01104576 2001-02-15 2001-02-15 Wide-area audio amplifying method and equipment Expired - Fee Related CN1219282C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 01104576 CN1219282C (en) 2001-02-15 2001-02-15 Wide-area audio amplifying method and equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 01104576 CN1219282C (en) 2001-02-15 2001-02-15 Wide-area audio amplifying method and equipment

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CN1369875A CN1369875A (en) 2002-09-18
CN1219282C true CN1219282C (en) 2005-09-14

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