CN2404109Y - Noise detector for broadcasting spot - Google Patents
Noise detector for broadcasting spot Download PDFInfo
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- CN2404109Y CN2404109Y CN 99258208 CN99258208U CN2404109Y CN 2404109 Y CN2404109 Y CN 2404109Y CN 99258208 CN99258208 CN 99258208 CN 99258208 U CN99258208 U CN 99258208U CN 2404109 Y CN2404109 Y CN 2404109Y
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Abstract
The utility model relates to a noise detector for broadcasting spot, which is a noise detector especially suitable for broadcasting spot. The utility model comprises an aluminium section casing, a noise detection point, a noise sampling circuit, an analog-digital conversion control circuit, a noise level indicating circuit and a power supply circuit. The utility model can automatically sample for the detection point of the broadcasting spot after broadcasting voice is stopped for three seconds, and the utility model can automatically adjust broadcasting volumes of each broadcasting spot according to the magnitude of the actual noise of the broadcasting spot. The utility model which is the noise detector for the broadcasting spot has the advantages of easy fabrication, low cost and strong applicability.
Description
The utility model belongs to the instrument that special detection is broadcasted on-the-spot noise.Specifically, it relates to the noise size of measuring station, subway and various public places, according to its noise size, can automatically control the noise detector of speech amplifier gain.
At present, the volume potentiometer fork-like farm tool used in ancient China that the speech amplifier that domestic station, subway and various public place use, its volume can only armrest wage adjustment joint be arranged on the control desk is finished.Because the control desk that has is more away from broadcasting scene or service area, and respectively broadcast the on-the-spot stream of people and ambient conditions has nothing in common with each other, the noise size is also different, so the broadcasting volume is difficult to control, it is excessive or too small volume often to occur, impact the passenger and have a rest, make everybody can not hear clearly broadcasting, to making passenger's phenomenon of missing the bus, get on the wrong bus happen occasionally that this is an one; Its two, the instrument of domestic measurement noise all can not utilize the gain of noise size control speech amplifier, does not also find related data by retrieval so far.
The purpose of this utility model is to develop a kind of station, subway and on-the-spot noise detector of various public place broadcasting of being specially adapted to.This noise detector is the walkaway point to be taken a sample after left alone without help three second the broadcaster, and each walkaway point of each service area is carried out 256 samplings, the gain of control power amplifiers automatically after software processes automatically.Be a kind ofly have high reliability, easily produce, cost low energy overcomes above-mentioned defective a kind ofly is used to broadcast on-the-spot noise detector.
The utility model is finished by following step: see accompanying drawing 1 or accompanying drawing 3, it comprises aluminium section bar casing, front panel, rear panel, chassis backplane, the noise samples circuit board is housed being equipped with on the chassis backplane to be equipped with on noise level indicating circuit plate, the rear panel on power transformer, power unit circuit board, analog-digital conversion control circuit plate, the front panel; It is characterized in that: a broadcasting scene has three walkaway points, be connected with a balanced cable between each walkaway point and the noise samples change-over circuit, the noise samples change-over circuit is made up of 12 tunnel noise samples circuit and 12 tunnel all-wave linear transform circuits, its output is delivered to analog-digital conversion control circuit through the filtering circuit of resistor R and capacitor C formation, have left alone without help judging circuit of speech in the analog-digital conversion control circuit, when talker's speech after left alone without help three second, can sample to broadcasting on-the-spot noise automatically immediately, through single-chip microcomputer each check point of each service area is carried out 256 samplings, get its mean value, three mean values that three check points of each service area are respectively sampled after 256 times compare again, get it in the middle of numerical value as sampled result.And sampled result is delivered to the noise level indicating circuit show; The voice signal of speech amplifier is connected to the analog-digital conversion control circuit of noise detector, is sent to power amplifier after decay.
See accompanying drawing 2, each check point is made up of the linear transformer of six cun loudspeakers and 120 volts, 8 ohm, 5 watts, and linear transformer is elementary to be that six cun loudspeakers of 8 ohm are connected with impedance.
See accompanying drawing 4, every road noise samples circuit adopts integrated circuit LM324 to constitute measuring amplifier, resistor R
144, resistor R
143After being in series, its tie point ground connection, two other arm are connected respectively to integrated circuit (IC)
13 pin, 5 pin, integrated circuit (IC)
12 pin, 6 pin pass through resistor R
3Be connected integrated circuit (IC)
11 pin, 2 pin pass through resistor R
2Be connected integrated circuit (IC)
16 pin, 7 pin pass through resistor R
4Be connected integrated circuit (IC)
11 pin, 13 pin pass through resistor R
1Be connected integrated circuit (IC)
17 pin, 12 pin pass through resistor R
5Be connected integrated circuit (IC)
113 pin, 14 pin pass through resistor R
6Be connected integrated circuit (IC)
112 pin through resistor R
7Ground connection, capacitor C
1With resistor R
8Be connected on integrated circuit (IC) after being in series
114 pin and 9 pin between, IC
110 pin ground connection, diode V
1Two ends are connected IC
18 pin, 9 pin between, IC
18 pin meet diode V
1Negative pole, IC
19 pin meet diode V
1Positive pole, diode V
2Negative pole and resistor R
9After being in series, be connected IC
18 pin, 9 pin between, diode V
2Positive pole be connected on IC
18 pin, resistor R
9The other end be connected on IC
1The end of 9 pin, resistor R 155 after being in parallel with capacitor C2 be connected to an end, the resistor R of resistor R 10
155With capacitor C
2Other end ground connection after being in parallel.
See accompanying drawing 5, the analog to digital conversion circuit of analog-digital conversion control circuit plate is by integrated circuit (IC)
17Formation, its model are ADC0816, integrated circuit (IC)
1723 pin connect simulation ground, 19 pin meet potentiometer W
1Central point, potentiometer W
1Upper end and voltage stabilizing diode V be in parallel, negative pole and the resistor R of voltage stabilizing diode V
67An end be connected, resistor R
67The other end is connected the positive pole of voltage stabilizing diode V and IC with positive 5 volts of power supplys
1723 pin be connected capacitor C
46Be connected IC
1719 pin and 23 pin between.
The utility model has the advantages that: this noise detector can detect, control 4 service areas simultaneously, the walkaway point of this noise detector is to be made of linear transformer and loudspeaker, as long as a service area sets up three walkaway points just can detect really broadcasting on-the-spot noise fully, and can broadcast the broadcasting volume that on-the-spot actual noise situation is regulated each service area automatically according to each; Thereby make everybody hear clearly broadcast sounds; It is a kind ofly can regulate the size of the on-the-spot broadcasting volume of broadcasting at a distance, automatically according to the on-the-spot actual noise size of broadcasting, is applicable to the desirable noise detector of station, subway and public place.
Accompanying drawing 1, the noise detector structural representation: 1, be the aluminium section bar casing; 2, be front panel; 3, be rear panel; 4, be chassis backplane
Accompanying drawing 2, walkaway point electrical schematic diagram
Accompanying drawing 4, noise samples circuit board electrical schematic diagram
Accompanying drawing 6, noise level indicating circuit plate electrical schematic diagram
In conjunction with the embodiments the utility model is described further: (1), utilize loudspeaker will broadcast on-the-spot noise signal and convert electric signal to and utilize linear transformer that the weak voltage conversion of signals is become the higher voltage signal, adopt balanced cable to be sent to; (2), described noise samples circuit send the ac sampling signal at end to amplify and convert direct current signal to three walkaway points and is sent to analog-digital conversion control circuit; (3), the analog-digital conversion ic on the analog-digital conversion control circuit 3 that is fixed on the chassis backplane should adopt ADC0816, and its reference voltage must be adjusted in 2 volts; (4), be fixed on the triode V described in left alone without help judging circuit of speech on the analog-digital conversion control circuit 3 on the chassis backplane
1Should adopt 2N5551; (5), the amplifier of voice signal through adopting integrated circuit 75558 to form amplifies 10 times after resistance value is 100 ohm a resistor R
8Be sent to left alone without help judging circuit of speech, the characteristics of this circuit are that charging is slow, and discharge is fast.As long as voice signal is arranged, electric capacity is the capacitor C of 22 μ f
8On electric charge will be in several milliseconds be 4148 diode V by model
2And triode V
1CE knot put, 4 pin that make single-chip microcomputer 89C51 are low level; Capacitor C during speech
8By resistance value is the resistor R of 200K ohm
10Charging, speech be after left alone without help three second, capacitor C
8Be charged to 3 volts, 4 pin that make single-chip microcomputer 89C51 are high level.(6) the single-chip microcomputer IC on the described analog-digital conversion control circuit 3
15Should adopt 89C51, IC
15Each walkaway point of each service area is carried out 256 samplings, obtain the mean value of each walkaway point and three mean values of each service area are compared, the taking-up intermediate value is as sampled result.Utilizing model on the analog-digital conversion control circuit 3 is 8243 integrated circuit (IC)
22P
A, P
B, P
C, P
DIt is 4051 analog switch IC that mouth is controlled model on the analog-digital conversion control circuit 3 respectively
2, IC
5, IC
8, IC
11To finish decay to the voice signal that is sent to power amplifier.Realization is to broadcasting on-the-spot walkaway.And the gain of control power amplifiers automatically.
Claims (5)
1. one kind is used to broadcast on-the-spot noise detector, it comprises aluminium section bar casing, front panel, rear panel, chassis backplane, is equipped with on noise level indicating circuit plate, the rear panel noise samples circuit board is housed in that power transformer, power unit circuit board, analog-digital conversion control circuit plate, front panel are housed on the chassis backplane; It is characterized in that: a broadcasting scene has three walkaway points, be connected with a balanced cable between each walkaway point and the noise samples change-over circuit, the noise samples change-over circuit is made up of 12 tunnel noise samples circuit and 12 tunnel all-wave linear transform circuits, and it is exported through resistor R
10With capacitor C
2The filtering circuit that constitutes is delivered to analog-digital conversion control circuit, have left alone without help judging circuit of speech in the analog-digital conversion control circuit, when talker's speech after left alone without help three second, can sample to broadcasting on-the-spot noise automatically immediately, through single-chip microcomputer each check point of each service area is carried out 256 samplings, get its mean value, three mean values that three check points of each service area are respectively sampled after 256 times compare again, get its middle numerical value as sampled result, and sampled result is delivered to the demonstration of noise level indicating circuit; The voice signal of speech amplifier is connected to the analog-digital conversion control circuit of noise detector, is sent to power amplifier after decay.
2. according to the described detecting device of claim 1, it is characterized in that: each check point is made up of the linear transformer of six cun loudspeakers and 120 volts, 8 ohm, 5 watts, and linear transformer is elementary to be that six cun loudspeakers of 8 ohm are connected with impedance.
3. according to the described detecting device of claim 1, it is characterized in that: every road noise samples circuit adopts integrated circuit LM324 to constitute measuring amplifier, resistor R
144, resistor R
143After being in series, its tie point ground connection, two other arm are connected respectively to integrated circuit (IC)
13 pin, 5 pin, integrated circuit (IC)
12 pin, 6 pin pass through resistor R
3Be connected integrated circuit (IC)
11 pin, 2 pin pass through resistor R
2Be connected integrated circuit (IC)
16 pin, 7 pin pass through resistor R
4Be connected integrated circuit (IC)
11 pin, 13 pin pass through resistor R
1Be connected integrated circuit (IC)
17 pin, 12 pin pass through resistor R
5Be connected integrated circuit (IC)
113 pin, 14 pin pass through resistor R
6Be connected integrated circuit (IC)
112 pin through resistor R
7Ground connection, capacitor C
1With resistor R
8Be connected on integrated circuit (IC) after being in series
114 pin and 9 pin between, IC
110 pin ground connection, diode V
1Two ends are connected IC
18 pin, 9 pin between, IC
18 pin meet diode V
1Negative pole, IC
19 pin meet diode V
1Positive pole, diode V
2Negative pole and resistor R
9After being in series, be connected IC
18 pin, 9 pin between, diode V
2Positive pole be connected on IC
18 pin, resistor R
9The other end be connected on IC
19 pin, resistor R
155With capacitor C
2End after being in parallel is connected to resistor R
10An end, resistor R
155With capacitor C
2Other end ground connection after being in parallel.
4. according to the described detecting device of claim 1, it is characterized in that: the analog to digital conversion circuit of analog-digital conversion control circuit plate is by integrated circuit (IC)
17Formation, its model are ADC0816, integrated circuit (IC)
1723 pin connect simulation ground, 19 pin meet potentiometer W
1Central point, potentiometer W
1Be in parallel with voltage stabilizing diode V, negative pole and the resistor R of voltage stabilizing diode V
67An end be connected, resistor R
67The other end is connected the positive pole of voltage stabilizing diode V and IC with positive 5 volts of power supplys
1723 pin be connected capacitor C
46Be connected IC
1719 pin and 23 pin between.
5. according to the described detecting device of claim 1, it is characterized in that: left alone without help judging circuit of the speech in analog-digital conversion control circuit is by triode V
1Base stage connect resistor R
8An end, V
1Grounded emitter, V
1Collector and resistor R
9An end be connected, R
9The other end be connected V for positive 5 volts with power supply
1Collector and capacitor C
7Positive pole be connected, C
7Minus earth, V
1Collector and diode V
2Negative pole be connected, V
2Positive pole be connected to analog-digital conversion control circuit IC
154 pin, capacitor C
8Positive pole be connected diode V
2Positive pole, capacitor C
8Minus earth, resistor R
10One is connected to diode V
2Positive pole, resistor R
10The other end be connected on positive 5 volts of power supplys.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99258208 CN2404109Y (en) | 1999-12-30 | 1999-12-30 | Noise detector for broadcasting spot |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99258208 CN2404109Y (en) | 1999-12-30 | 1999-12-30 | Noise detector for broadcasting spot |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2404109Y true CN2404109Y (en) | 2000-11-01 |
Family
ID=34040897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99258208 Expired - Fee Related CN2404109Y (en) | 1999-12-30 | 1999-12-30 | Noise detector for broadcasting spot |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2404109Y (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1925584B (en) * | 2006-09-12 | 2010-05-12 | 深圳创维数字技术股份有限公司 | Energy-saving system and method for digital television receiving machine |
| CN102164015A (en) * | 2011-04-20 | 2011-08-24 | 铁道部运输局 | Method and device for detecting station broadcast system |
| CN103618580A (en) * | 2013-11-22 | 2014-03-05 | 株洲南车时代电气股份有限公司 | Volume adjustment device of train broadcast system and train broadcast system |
| CN104158614A (en) * | 2014-08-27 | 2014-11-19 | 南车南京浦镇车辆有限公司 | Passenger train broadcast control method |
| CN106210977A (en) * | 2016-07-15 | 2016-12-07 | 柳州国淘科技有限公司 | A kind of public place is automatically adjusted device and the control method of broadcast volume |
| CN107046662A (en) * | 2017-06-20 | 2017-08-15 | 北京贝能达信息技术股份有限公司 | Track traffic broadcast multi-channel noise detection volume controller and control method |
| CN109185759A (en) * | 2018-10-24 | 2019-01-11 | 武汉金东方智能景观股份有限公司 | Imitative piano performance lamp and its control method |
| CN110072174A (en) * | 2019-05-21 | 2019-07-30 | 北京京海鸣电子技术研究所 | Volume adaptive identifying machine |
-
1999
- 1999-12-30 CN CN 99258208 patent/CN2404109Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1925584B (en) * | 2006-09-12 | 2010-05-12 | 深圳创维数字技术股份有限公司 | Energy-saving system and method for digital television receiving machine |
| CN102164015A (en) * | 2011-04-20 | 2011-08-24 | 铁道部运输局 | Method and device for detecting station broadcast system |
| CN103618580A (en) * | 2013-11-22 | 2014-03-05 | 株洲南车时代电气股份有限公司 | Volume adjustment device of train broadcast system and train broadcast system |
| CN103618580B (en) * | 2013-11-22 | 2016-04-06 | 株洲南车时代电气股份有限公司 | Train broadcasting system volume adjustment device and train broadcasting system |
| CN104158614A (en) * | 2014-08-27 | 2014-11-19 | 南车南京浦镇车辆有限公司 | Passenger train broadcast control method |
| CN104158614B (en) * | 2014-08-27 | 2017-07-18 | 中车南京浦镇车辆有限公司 | A kind of passenger train broadcast controlling method |
| CN106210977A (en) * | 2016-07-15 | 2016-12-07 | 柳州国淘科技有限公司 | A kind of public place is automatically adjusted device and the control method of broadcast volume |
| CN107046662A (en) * | 2017-06-20 | 2017-08-15 | 北京贝能达信息技术股份有限公司 | Track traffic broadcast multi-channel noise detection volume controller and control method |
| CN109185759A (en) * | 2018-10-24 | 2019-01-11 | 武汉金东方智能景观股份有限公司 | Imitative piano performance lamp and its control method |
| CN110072174A (en) * | 2019-05-21 | 2019-07-30 | 北京京海鸣电子技术研究所 | Volume adaptive identifying machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |