CN206313997U - Display device board exports audio detection device - Google Patents
Display device board exports audio detection device Download PDFInfo
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- CN206313997U CN206313997U CN201621365898.3U CN201621365898U CN206313997U CN 206313997 U CN206313997 U CN 206313997U CN 201621365898 U CN201621365898 U CN 201621365898U CN 206313997 U CN206313997 U CN 206313997U
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Abstract
The utility model provides a kind of display device board output audio detection device, including power amplifier, head circuit, line signal circuit and processor, power amplifier gathers display device board output work discharge signal, head circuit gathers display device board headphone output signal, line signal circuit gathers display device board line output signal, processor exports audio frequency parameter according to the signal acquisition display device board for receiving, specifically, these parameters include the power amplifier power of display device board, earphone amplitude and circuit output amplitude, so as to realize exporting display device board the efficient detection of audio.
Description
Technical field
The utility model is related to testing techniques of equipment field, more particularly to display device board output audio detection dress
Put.
Background technology
At present, increasing display device enters in people's production and living, and giving people to live brings huge facility,
Such as television set, liquid crystal display and LED display device etc..Display device extensive use, how efficient detection display device
Board power output has become the problem of technical staff.
By taking television set as an example, when being detected to television set board power output, mainly there are following two modes at present：It is a kind of
It is that, using special audio analyzer (AP), audio analyzer is powerful, measurement is accurate.But a disadvantage is that equipment is heavy, and valency
Lattice are expensive, are unfavorable for high-volume equipment；Another kind is, using universal meter, to be added to board audio output interface and loaded, using ten thousand
The virtual value that shelves testing audio is exported is exchanged with table.Then according to formula P=U2/ R, the voltage that will be read on universal meter is effective
Value is converted into power.The advantage of which is available with existing instrument, cheap, but defect is also apparent from, it is necessary to external
Load, and manual calculations are needed, measuring accuracy is not high, higher to tester's requirement, and testing efficiency is not high.
Utility model content
Based on this, it is necessary to for the low problem of general display device board output audio detection device detection efficiency,
A kind of efficient display device board output audio detection device is provided.
A kind of display device board exports audio detection device, including the work(for gathering display device board output work discharge signal
Electric discharge road, the head circuit of collection display device board headphone output signal, collection display device board line output signal
Line signal circuit and the processor according to the signal acquisition display device board output audio frequency parameter for receiving；
Power amplifier, head circuit and line signal circuit are connected with processor respectively.
The utility model display device board exports audio detection device, including power amplifier, head circuit, line signal
Circuit and processor, power amplifier collection display device board output work discharge signal, head circuit collection display device board
Headphone output signal, line signal circuit collection display device board line output signal, processor is according to the signal for receiving
Display device board output audio frequency parameter is obtained, specifically, these parameters include power amplifier power, the earphone of display device board
Amplitude and circuit output amplitude, so as to realize exporting display device board the efficient detection of audio.
Brief description of the drawings
Fig. 1 is the structural representation that the utility model display device board exports audio detection device one embodiment；
Fig. 2 is that the utility model display device board exports second structural representation of embodiment of audio detection device；
Fig. 3 is power amplifier in the utility model display device board output one of application example of audio detection device
Physical circuit principle schematic；
Fig. 4 is head circuit in the utility model display device board output one of application example of audio detection device
Physical circuit principle schematic；
Fig. 5 is line signal in the utility model display device board output one of application example of audio detection device
Circuit physical circuit principle schematic；
Fig. 6 be the utility model display device board output the one of application example of audio detection device in processor with
And its structural representation of peripheral circuit.
Specific embodiment
As shown in figure 1, a kind of display device board output audio detection device, including collection display device board output work
The power amplifier 100 of discharge signal, the head circuit 200 of collection display device board headphone output signal, collection display device plate
The line signal circuit 300 of card line output signal and according to receive signal acquisition display device board output audio ginseng
Several processors 400, power amplifier 100, head circuit 200 and line signal circuit 300 are connected with processor 400 respectively.
Power amplifier 100 is used to gather display device board output work discharge signal, detects that the power amplifier signal can be detected
The power amplifier power of display device board output.Specifically, as shown in Fig. 2 power amplifier 100 can include power amplifier load signal
Change-over circuit 120 and power amplifier signal amplification circuit 140, power amplifier load signal change-over circuit 120 amplify electricity by power amplifier signal
Road 140 is connected with processor 400.More specifically, accompanying drawing 3 is may refer to, accompanying drawing 3 is the one of which circuit theory of power amplifier 100
Schematic diagram, in actual applications, display device board power amplifier output CN1 accesses display device board output audio detection device work(
Detection interface RCH/, RCL, LCH/, LCL are put, in left loop L and right loop R, is loaded by two 4 Ohmic resistance (left sides
Loop is RA6 and RA11, and right loop is RA12 and RA16) be composed in series, then default load is 8 ohm, and one of them is born
Carry two ends and be connected in parallel on relay two ends, by short-circuit one of resistance load can be made to be changed into 4 ohm.Due to power amplifier input
It is differential signal, therefore by audio coupling transformer (T1 and T2), the differential signal for loading two ends is changed into single-ended signal defeated
Go out, single-ended signal feeding amplifier is amplified into processor 400.In figure 3, power amplifier 100 includes on-off circuit, load
Regulation circuit, coupling transformer circuit and discharge circuit, wherein, on-off circuit is with single resistance in load regulation circuit simultaneously
Connection.By taking left branch L as an example, the control end of on-off circuit is connected with processor 400, the output end and processor of discharge circuit
400 connections, the pin schematic diagram of subsequent processor 400 can be referred to the coupling part of processor 400.The output control of processor 400
, to on-off circuit, controlling switch closing of circuit or disconnection, when on-off circuit is closed, load resistance RA6 is short-circuit for signal L Com,
The load of load regulation circuit is 4 ohm, and when on-off circuit disconnects, load resistance RA6 is not short-circuit, carries the load of regulation circuit
Be 8 ohm, display device board power amplifier output signal by load regulation circuit, coupling transformer circuit and discharge circuit it
AMP L singal to processor 400 are exported afterwards.It is non-essential, as shown in figure 3, can be by ON-OFF control circuit repeat circuit
The triode of the control signal of receiving processor 400 is in adhesive or released state controlling it.
Head circuit 200 is used to gather display device board headphone output signal, and head circuit 200 can be believed including earphone
Number change-over circuit 220 and signal amplification circuit 240, earphone signal change-over circuit 220 gather the earphone from display device board
Output signal, the signal that signal amplification circuit 240 will be collected amplifies output to processor 400.Specifically, as shown in Fig. 2
Head circuit 200 includes earphone load signaling conversion circuit and earphone signal amplifying circuit 240, earphone load signal conversion electricity
Road is connected by earphone signal amplifying circuit 240 with processor 400.Wherein, earphone load signaling conversion circuit is used to gather aobvious
Show equipment plate card headphone output signal, earphone signal amplifying circuit 240 be used to being exported after being amplified the signal for collecting to
Processor 400.More particularly, accompanying drawing 4 is referred to, Fig. 4 is the one of which circuit theory schematic diagram of head circuit 200, in reality
In the application of border, earphone load is 32 ohm loads of standard, and earphone input signal is by the way that after load, being sent directly into amplifier is carried out
Amplify, the signal that then will amplify sends into processor 400.In fig. 4, head circuit 200 includes loading section and amplifies output
Part, amplifying output par, c includes right side discharge circuit and left side discharge circuit, loading section output PH-AROUT and RH-
ALOUT corresponds to right audio output and left side audio data respectively, and PH-AROUT and RH-ALOUT is electric with respective amplifier respectively
Road connects, and right side discharge circuit exports HP R singal to processor 400, left side discharge circuit output HP L singal to place
Reason device 400, the pin being specifically connected with processor 400 may refer to the pin schematic diagram of subsequent treatment 400.
Line signal circuit 300 is used to gather display device board line output signal, specifically, line signal circuit
The analog signals of 300 collection display device board circuit outputs, and the signal input that will be collected is to processor 400.It is specific next
Say, as shown in Fig. 2 line signal circuit 300 includes analogue audio frequency input interface 320 and line input circuit 340, analog audio
Frequency input interface 320 is connected by line input circuit 340 with processor 400, wherein analogue audio frequency input interface 320 and display
Equipment plate card is connected, and the simulated audio signal of collection display device board output, the analog signal for collecting is input into circuit
Circuit 340, line input circuit 340 sends the signal to processor 400.More particularly, accompanying drawing 5 is referred to, Fig. 5 is circuit
The one of which circuit theory schematic diagram of signal circuit 300, the line output signal that collection display device board is exported to processor
400.In Fig. 5, line signal circuit 300 includes that part and circuit importation are accessed in port, and port is accessed part and set with display
Main/standby board cards circuit output interface is connected, and part output COA L and COA R two paths of signals are accessed in port, and export respectively to circuit
(in Fig. 5 COA L with COA R) circuit importation exports COAX L and COAX R to processor 400 in importation, specifically with
The connection of processor 400 pin situation may refer to the pin schematic diagram for the treatment of 400.
Processor 400 is used for according to the signal acquisition display device board output audio frequency parameter for receiving, specifically, sound
As long as frequency parameter is including gathering the display device board output signal power amplifier power of signal acquisition based on power amplifier 100, being based on
The display device board of the collection signal acquisition of head circuit 200 exports earphone signal amplitude and based on line signal circuit 300
Gather the line output signal amplitude of the display device board output of signal acquisition.Wherein in one embodiment, processor 400
Including ADC (Analog-to-Digital Converter, A/D converter) sampling modules and digital integrator, ADC samplings
Module is connected with digital integrator.ADC sampling modules are the ADC of 12 bit resolutions, the data feeding digital integration after ADC samplings
Device, digital integrator can calculate the virtual value of current ADC sampled signals, and the amplitude that input signal is then converted into again is big
It is small, and thus calculate input and treat measured value, most measured value is exported and is pushed to user at last.More particularly, accompanying drawing is referred to
6, accompanying drawing 6 is the one of which concrete structure schematic diagram of processor 400, and in the application example, processor 400 can select model
It is the processor of DSPIC30F5011.It is left in No. 33 pin output L Com control signals to power amplifiers 100 in processor 400
The control end of side on-off circuit, the control of right-side switch circuit in No. 64 pin output R Com control signals to power amplifiers 100
End, No. 14 pins receive the AMP L singal of discharge circuit output in power amplifier 100, and No. 15 pins receive power amplifier
The AMP R singal of discharge circuit output in 100, No. 13 pins receive the HP of left side discharge circuit output in head circuit 200
L singal, No. 21 pins receive the HP R singal of right side discharge circuit output in head circuit 200, and No. 27 pins are received
The COAX R, No. 29 COAX L of the output of pin receiving circuit signal circuit 300 of the output of line signal circuit 300.
The utility model display device board exports audio detection device, including power amplifier 100, head circuit 200, line
Road signal circuit 300 and processor 400, the collection display device board output work discharge signal of power amplifier 100, head circuit
200 collection display device board headphone output signals, the collection display device board line output signal of line signal circuit 300,
Processor 400 exports audio frequency parameter according to the signal acquisition display device board for receiving, and specifically, these parameters include aobvious
Show power amplifier power, earphone amplitude and the circuit output amplitude of equipment plate card, so as to realize exporting audio to display device board
Efficient detection.
Wherein in one embodiment, power amplifier load signal change-over circuit 120 is connected including switch and at least two
Resistance, switch and at least one resistor coupled in parallel.Accompanying drawing 3 is specifically referred to, in fig. 3 power amplifier load signal change-over circuit 120
Middle L branch roads include two series connection 4 Ohmic resistance RA6 and RA11, R branch road include two series connection 4 Ohmic resistance RA12 and
RA16, relay switch KA1 and a resistor coupled in parallel in L branch roads, relay switch KA2 and a resistor coupled in parallel in R branch roads, after
The closure of electric switch KA1 and KA2 can change power amplifier load with disconnection, so as to simulate various test scenes, realize to difference
The test of display device board.
As shown in Fig. 2 wherein in one embodiment, display device board output audio detection device is also supplied including USB
Electric module 500, USB power supply modules 500 are connected with processor 400.
USB power supply modules 500 are used to provide electric energy for display device board output audio detection device other devices.
As shown in Fig. 2 wherein in one embodiment, display device board output audio detection device also includes display mould
Block 600, display module 600 is connected with processor 400.
Display module 600 is used for the detection parameter of the output of video-stream processor 400, is easy to user intuitively to understand testing result,
Such as display module 600 can show that currently detected display device board L channel power amplifier power, R channel power amplifier are high-power
And present load size.Non-essential, display module 600 can include high performance liquid crystal display.
Generally, the main advantage of the utility model display device board output audio detection device is embodied in such as lower section
Face：
1) device of whole device simple structure and use device excellent cost performance, whole device low production cost,
Suitable for large-scale promotion and application.
2) facilitate easy-to-use, it is only necessary to connect corresponding interface, so that it may corresponding test value is directly read on screen.For
Former method of testing, the present apparatus is than audio-frequency test instrument convenient use.Also it is more directly perceived and accurate than universal meter test, even if not any
The people on basis, it is also possible to directly read data from screen.
3) test function is complete.One device can be with direct measurement power amplifier power, earphone amplitude and circuit input range etc..
And power amplifier load could be arranged to 4 ohm and 8 ohm, the power amplifier test of all boards is suitable for almost.
Embodiment described above only expresses several embodiments of the present utility model, and its description is more specific and detailed,
But therefore can not be interpreted as the limitation to utility model patent scope.It should be pointed out that for the common skill of this area
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
Protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (10)
1. a kind of display device board exports audio detection device, it is characterised in that including collection display device board output work
The power amplifier of discharge signal, the head circuit of collection display device board headphone output signal, collection display device board circuit
The line signal circuit of output signal and the treatment according to the signal acquisition display device board output audio frequency parameter for receiving
Device；
The power amplifier, the head circuit and the line signal circuit are connected with the processor respectively.
2. display device board according to claim 1 exports audio detection device, it is characterised in that the power amplifier
Including power amplifier load signal change-over circuit and power amplifier signal amplification circuit, the power amplifier load signal change-over circuit is by described
Power amplifier signal amplification circuit is connected with the processor.
3. display device board according to claim 2 exports audio detection device, it is characterised in that the power amplifier load
Signaling conversion circuit includes the resistance of switch and at least two series connection, the switch and at least one resistor coupled in parallel.
4. display device board according to claim 1 exports audio detection device, it is characterised in that the head circuit
Including earphone load signaling conversion circuit and earphone signal amplifying circuit, the earphone load signaling conversion circuit is by described
Earphone signal amplifying circuit is connected with the processor.
5. display device board according to claim 1 exports audio detection device, it is characterised in that the line signal
Circuit includes analogue audio frequency input interface and line input circuit, and the analogue audio frequency input interface is input into by the circuit
Circuit is connected with the processor.
6. display device board according to claim 1 exports audio detection device, it is characterised in that also supplied including USB
Electric module, the USB power supply modules are connected with the processor.
7. display device board according to claim 1 exports audio detection device, it is characterised in that also including display mould
Block, the display module is connected with the processor.
8. display device board according to claim 7 exports audio detection device, it is characterised in that the display module
Including liquid crystal display.
9. display device board according to claim 1 exports audio detection device, it is characterised in that the processor bag
ADC sampling modules and digital integrator are included, the ADC sampling modules are connected with the digital integrator.
10. display device board according to claim 1 exports audio detection device, it is characterised in that the processor
Model include DSPIC30F5011.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621365898.3U CN206313997U (en) | 2016-12-13 | 2016-12-13 | Display device board exports audio detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621365898.3U CN206313997U (en) | 2016-12-13 | 2016-12-13 | Display device board exports audio detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206313997U true CN206313997U (en) | 2017-07-07 |
Family
ID=59251459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621365898.3U Active CN206313997U (en) | 2016-12-13 | 2016-12-13 | Display device board exports audio detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206313997U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108462931A (en) * | 2018-02-07 | 2018-08-28 | 深圳创维－Rgb电子有限公司 | A kind of audio-frequency test equipment and control method |
-
2016
- 2016-12-13 CN CN201621365898.3U patent/CN206313997U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108462931A (en) * | 2018-02-07 | 2018-08-28 | 深圳创维－Rgb电子有限公司 | A kind of audio-frequency test equipment and control method |
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