CN2593171Y - Noise measuring apparatus of ecological display screen - Google Patents
Noise measuring apparatus of ecological display screen Download PDFInfo
- Publication number
- CN2593171Y CN2593171Y CN 03227986 CN03227986U CN2593171Y CN 2593171 Y CN2593171 Y CN 2593171Y CN 03227986 CN03227986 CN 03227986 CN 03227986 U CN03227986 U CN 03227986U CN 2593171 Y CN2593171 Y CN 2593171Y
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- China
- Prior art keywords
- display screen
- noise
- operational amplifier
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- chip microcomputer
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a noise measuring apparatus of an ecological display screen. The noise measuring apparatus comprises an ecological display screen. The utility model is characterized in that a noise measuring apparatus is arranged in the ecological display screen, and is composed of a nixie tube plate of five inches and seven sections, a sound sensor, a noise main plate and relevant software, wherein the sound sensor is arranged on a signal plate of the ecological display screen and is connected with the noise main plate; the nixie tube plate of five inches and seven sections is arranged on a display screen of the ecological display screen and is connected with the noise main plate. The utility model has the advantages of frequency weighting characteristic, large range of decibel which is measured, simple circuit, convenient adjustment and low price.
Description
Technical field
The utility model relates to a kind of noise level measurement device of ecological display screen, is exclusively used in public places such as outdoor large greenery patches, square, sub-district, universities and colleges and road, belongs to the noise-measurement technique field.
Background technology
Along with the attention of country to environmental protection, require to reduce in public places noise, therefore sound meter is installed in public places, present sound meter generally adopts logarithmic amplifier, but complex circuit, debug difficulties, and cost an arm and a leg.
Summary of the invention
To be that invention is a kind of have a frequency character of weighting to the purpose of this utility model, and institute surveys that the decibel scope is big, and circuit is simple, debugs to make things convenient for the noise level measurement device of cheap ecological display screen.
For realizing above purpose, the technical solution of the utility model provides a kind of noise level measurement device of ecological display screen, it comprises ecological display screen, its characteristics are, in ecological display screen, be equipped with the noise level measurement device, the noise level measurement device is made up of 5 cun seven segment numerical tube sheets, sound transducer, noise mainboard and related software, sound transducer places on the signal plate of ecological display screen, be connected in the noise mainboard, 5 cun seven segment numerical tube sheets place on the display screen of ecological display screen, are connected in the noise mainboard.
The noise mainboard by 1 single-chip microcomputer, 5 operational amplifiers, 1 crystal oscillator, 2 output drive integrated device, 1 reference voltage source, 1 rectifier bridge, 4 three terminal integrated voltage stabilizers, 4 diodes, two stabilivolts, and a plurality of resistance, electric capacity and variable resistor form.
The utility model adopts integrated device, utilizes a plurality of input ports of microcomputer, with signal staging treating by size, the amplification of input signal also by section along separate routes, microcomputer can read signal voltage from different sections mouthful automatically by signal magnitude, so just can reduce every road signal excursion, make survey the decibel scope be 32-95dB.
The utility model fully phases out the logarithm amplifying circuit, but utilize microcomputer just can convert the decimal number analog quantity to logarithm easily and accurately, and directly export with the seven segment code form, behind driving circuit, on giant-screen, show with seven segment numerical, and designing the circuit network of forming by resistance, capacity cell and integrated transporting discharging device, the signal of different frequency just can obtain different enlargement factors, thereby makes circuit have the frequency character of weighting.
The utility model has the advantages that to have the frequency character of weighting, to survey the decibel scope big, circuit is simple, debugging is convenient, and is cheap.
Description of drawings:
Fig. 1 is the noise level measurement apparatus structure synoptic diagram of ecological display screen;
Fig. 2 is noise motherboard circuit figure;
Fig. 3 is a single-chip microcomputer loader process flow diagram;
Fig. 4 installs the noise level measurement schematic representation of apparatus in the ecological display screen;
Fig. 5 is ecological display screen space of a whole page arrangenent diagram.
Embodiment:
As shown in Figure 1, be the noise level measurement device in the ecological display screen, it comprises ecological display screen 1 and noise level measurement device 2, noise level measurement device 2 is made up of 5 cun seven segment numerical tube sheets 3, sound transducer 4, noise mainboard 6 and related software, sound transducer 4 places on the signal plate 5 of ecological display screen 1, be connected in 6,5 cun seven segment numerical tube sheets 3 of noise mainboard and place on the display screen of ecological display screen 1, be connected in noise mainboard 6.
As shown in Figure 2, be noise motherboard circuit figure, noise mainboard 4 is by 1 single-chip microcomputer, 5 operational amplifiers, 1 crystal oscillator, 2 outputs drive integrated device, 1 reference voltage source, 1 rectifier bridge, 4 three terminal integrated voltage stabilizers, 4 diodes, and a plurality of resistance, electric capacity is formed, operational amplifier U1 wherein, U2, U4 forms signal amplification circuit, operational amplifier U3, U5 forms precise rectification circuit, crystal oscillator produces the clock signal of single-chip microcomputer work, output drives integrated device and increases output current, to drive 5 cun seven segment numerical tube sheets 3, a plurality of resistance, electric capacity makes circuit have different enlargement factors to the signal of different frequency, realizes the frequency character of weighting.
The relation of joining that connects of noise motherboard circuit is: sound transducer 4 is connected with noise mainboard 6 by connector, lead-in wire, and for noise signal being divided large and small two sections processing, the signal that is input to noise mainboard 6 divides two the tunnel:
One the tunnel is to handle less one section of noise, 32-62dB, it links to each other with the input end of operational amplifier U1 after capacitor C 2 couplings, the output terminal of operational amplifier U1 is connected with the input end of operational amplifier U2, forming secondary amplifies, the output terminal of operational amplifier U2 links to each other with operational amplifier U3 input end, behind operational amplifier U3 precise rectification circuit, the alternation noise voltage is rectified into pulsating dc voltage, operational amplifier U3 output terminal and resistance R 11, the integrating circuit that capacitor C 5 is formed links to each other, convert pulsating dc voltage to steady DC voltage, link to each other with the I/O mouth # 4 of single-chip microcomputer with stabilivolt V2 through resistance R 19;
Another road is to handle bigger one section of noise, 63-95dB, it links to each other with the input end of operational amplifier U4 after capacitor C 6 couplings, making one-level amplifies, the output terminal of operational amplifier U4 links to each other with the input end of operational amplifier U5, behind operational amplifier U5 precise rectification circuit, the output terminal of operational amplifier U5 links to each other with the integrating circuit that resistance R 17, capacitor C 9 are formed, and links to each other with the I/O mouth # 7 of single-chip microcomputer with stabilivolt V3 through resistance R 20.
I/O mouth #11-#17, the #21-#27 of single-chip microcomputer links to each other with each seven input end of 2 output driving integrated device U7, U8 respectively, each seven output terminal of 2 output driving integrated device U7, U8 link to each other with 5 cun seven segment numerical tube sheets 3, thereby demonstrate noise figure through resistance, connector, line.
Crystal oscillator with link to each other with #9, the #10 of single-chip microcomputer respectively after capacitor C 10, C11 link to each other, reference voltage source connects the #5 input end with the single-chip microcomputer, 1 rectifier bridge, 4 three terminal integrated voltage stabilizers, 4 diodes, and a plurality of electric capacity form power supplys, the 15V power supply connects sound transducer 4 and reference voltage source respectively, and the 5V power supply connects the single-chip microcomputer.
As shown in Figure 3, be single-chip microcomputer loader process flow diagram, single-chip microcomputer U6 reads the noise voltage value that I/O mouth # 4 comes in, carry out differentiating noise automatically after the A/D conversion converts the DC voltage analog quantity of importing to digital quantity, whether differentiate noise dB greater than 62dB, if, then read the noise voltage value that I/O mouth # 7 comes in, carry out after DC voltage analog quantity that A/D conversion will input converts digital quantity to, by searching the table of logarithm of the 63-95dB that deposits internal memory in, realize that input signal is converted to corresponding logarithm value, be compiled into seven segment code output at last and show; If not, by searching the table of logarithm of the 32-62dB that deposits internal memory in, realize that input signal is converted to corresponding logarithm value, be compiled into seven segment code output at last and show.
Embodiment:
Shown in Fig. 4,5, for the noise level measurement schematic representation of apparatus is installed in the ecological display screen, ecological display screen displaying contents comprises noise, temperature, humidity, time, and it is made up of 5 cun seven segment numerical tube sheets 3, sound transducer 4, signal plate 5, noise mainboard 6,7,8 cun seven segment numerical tube sheets 8 of window shutter, power panel 9, time, humidity circuit board 10, transformer 11, second signal plate 12, temperature circuit plate.Sound transducer 4 is contained on the signal plate 5, is connected in 6,5 cun seven segment numerical tube sheets 3 of noise mainboard and is contained on the panel of ecological display screen 1, is connected in noise mainboard 6.
Claims (2)
1. the noise level measurement device of an ecological display screen, it comprises ecological display screen (1), it is characterized in that, be equipped with noise level measurement device (2) in ecological display screen (1) lining, noise level measurement device (2) is made up of 5 cun seven segment numerical tube sheets (3), sound transducer (4), noise mainboard (6) and related software, sound transducer (4) places on the signal plate (5) of ecological display screen (1), be connected in noise mainboard (6), 5 cun seven segment numerical tube sheets (3) place on the display screen of ecological display screen (1), are connected in noise mainboard (6).
2. the noise level measurement device of ecological display screen according to claim 1, it is characterized in that, described noise mainboard (6) is by 1 single-chip microcomputer, 5 operational amplifiers, 1 crystal oscillator, 2 outputs drive integrated device, 1 reference voltage source, 1 rectifier bridge, 4 three terminal integrated voltage stabilizers, 4 diodes, two stabilivolts, and a plurality of resistance, electric capacity and variable resistor are formed, the connecing of its internal circuit relation of joining is: sound transducer (4) divides two-way to be connected with noise mainboard (6): the one tunnel links to each other through the input end of capacitor C 2 with operational amplifier U1, the output terminal of operational amplifier U1 links to each other with the input end of operational amplifier U2, the output terminal of operational amplifier U2 links to each other with operational amplifier U3 input end, operational amplifier U3 output terminal and resistance R 11, capacitor C 5 links to each other, through resistance R 19 and stabilivolt V2, link to each other with the I/O mouth #4 of single-chip microcomputer; Another road links to each other through the input end of capacitor C 6 with operational amplifier U4, the output terminal of operational amplifier U4 links to each other with the input end of operational amplifier U5, the output terminal of operational amplifier U5 links to each other with resistance R 17, capacitor C 9, through resistance R 20 and stabilivolt V3, link to each other with the I/O mouth #7 of single-chip microcomputer; The I/O mouth #11-#17 of single-chip microcomputer, #21-#27 drives integrated device U7 with 2 outputs respectively, seven input ends of each of U8 link to each other, 2 outputs drive integrated device U7, each seven output terminal of U8 are through resistance, connector, line links to each other with 5 cun seven segment numerical tube sheets (3), crystal oscillator and capacitor C 10, after C11 links to each other respectively with the #9 of single-chip microcomputer, #10 links to each other, reference voltage source is connected in the #5 input end of single-chip microcomputer, 1 rectifier bridge, 4 three terminal integrated voltage stabilizers, 4 diodes, and a plurality of electric capacity are formed power supply, the 15V power supply connects sound transducer (4) and reference voltage source respectively, and the 5V power supply connects the single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03227986 CN2593171Y (en) | 2003-01-06 | 2003-01-06 | Noise measuring apparatus of ecological display screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03227986 CN2593171Y (en) | 2003-01-06 | 2003-01-06 | Noise measuring apparatus of ecological display screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2593171Y true CN2593171Y (en) | 2003-12-17 |
Family
ID=33757071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03227986 Expired - Fee Related CN2593171Y (en) | 2003-01-06 | 2003-01-06 | Noise measuring apparatus of ecological display screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2593171Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109034754A (en) * | 2018-09-29 | 2018-12-18 | 重庆盾琪科技有限公司 | Major project Dispatch and Command Center |
-
2003
- 2003-01-06 CN CN 03227986 patent/CN2593171Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109034754A (en) * | 2018-09-29 | 2018-12-18 | 重庆盾琪科技有限公司 | Major project Dispatch and Command Center |
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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 |