CN102355620A - Method for realizing automatic debugging of wireless microphone and automatic debugging system - Google Patents
Method for realizing automatic debugging of wireless microphone and automatic debugging system Download PDFInfo
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- CN102355620A CN102355620A CN2011101544998A CN201110154499A CN102355620A CN 102355620 A CN102355620 A CN 102355620A CN 2011101544998 A CN2011101544998 A CN 2011101544998A CN 201110154499 A CN201110154499 A CN 201110154499A CN 102355620 A CN102355620 A CN 102355620A
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Abstract
The invention relates to an automatic debugging system for testing a wireless microphone, which comprises a transmitter test fixture, a receiver test fixture, a testing computer, testing computer software and instrument equipment which can be connected to the computer for realizing control on the basis of the computer software. The invention also relates to a method for automatically debugging the wireless microphone through the debugging system. By the debugging system and the debugging method, the complete automatic debugging in the process of producing the wireless microphone is realized.
Description
Technical field
The present invention relates to a kind of wireless microphone, the implementation method and the automatic debugging system thereof of the automatic debugging when further relating to wireless microphone production.
Background technology
Wireless microphone, or claim wireless microphone, be the sound appliances of transmission voice signal, the two large divisions forms by transmitter and receiver, is commonly referred to wireless microphone system.Come down to the one-way fashion wireless communication system.Early stage wireless microphone adopts FM frequency modulation to realize, adopts quartz (controlled) oscillator to produce emission and the precise and stable fixed frequency of reception afterwards, and the frequency pairing of a this microphone and receiver fixed single is used.The wireless microphone of specialty all is to adopt frequency synthesis (PLL Synthesized) mode now, can in preset bandwidth, switch desirable working channel arbitrarily, avoids being subjected to environmental interference can realize using simultaneously many wireless microphones again thereby reach.
The transmitting device circuit theory calcspar of general wireless microphone as shown in Figure 1, operation principle is following:
Pickup unit T01 picks up sound and converts audio signal into, and this signal is delivered to voltage controlled oscillator T07 behind variable gain amplifier T02, audio treatment unit T03, audio frequency potentiometer T04;
Microcontroller T05 produces the pilot signal that comprises data, and this signal is delivered to voltage controlled oscillator T07 through pilot signal band pass filter T11, pilot signal potentiometer T12;
Microcontroller T05 sends the high frequent carrier frequency data to phase-locked loop pll T06, and phase-locked loop pll T06 produces voltage signal control voltage controlled oscillator T07 and produces high-frequency carrier signal;
Voltage controlled oscillator T07 also is modulated to high-frequency carrier signal with audio signal and pilot signal.The modulated high-frequency signal is sent to antenna T10 through high frequency power amplifier T08, antenna match unit T09, at last by antenna transmission to receiving device.
And the receiving device circuit theory calcspar of general wireless microphone is as shown in Figure 2:
Antenna R101 receives the modulated high-frequency signal from transmitting device, and this signal is delivered to the first mixing unit R 106 behind high frequency filter R102, high-frequency amplifier R103;
The frequency data that microcontroller R401 transmission needs are to phase-locked loop pll R104, and phase-locked loop pll R104 produces first local oscillation signal that voltage signal control voltage controlled oscillator R107 generation needs, and this signal is delivered to the first mixing unit R 106;
The first mixing unit R 106 goes out first intermediate-freuqncy signal because of input modulated high-frequency signal, first local oscillation signal with mixing; This signal is delivered to the second mixing unit R 204 behind the first intermediate-frequency filter R201, the first intermediate frequency amplifier R202;
Second local oscillation signal that the second oscillator R203 generation needs is also delivered to the second mixing unit R 204;
The second mixing unit R 204 goes out second intermediate-freuqncy signal because of importing first intermediate-freuqncy signal, second local oscillation signal with mixing; This signal is delivered to demodulator behind the second intermediate-frequency filter R205, the second intermediate frequency amplifier R205; Demodulator will demodulate composite signal and the field intensity signal that comprises audio signal and pilot signal.
Field intensity signal is delivered to field intensity signal processing unit R306, handles back output control level signal to audio treatment unit R303.
Composite signal is delivered to variable gain amplifier R301; Amplify the back and divide two-way output: the one tunnel outputs to pilot signal trapper R302 filtering pilot signal; Remaining audio signal is also delivered to audio treatment unit R303, outputs to audio-frequency power amplifier after treatment, loud speaker is reduced to sound; One the tunnel outputs to pilot signal band pass filter R304, selects pilot signal and delivers to pilot signal demodulator R305, demodulates the high-low level signal of the pulse width variation that microcontroller R401 can discern.
Microcontroller R401 detects above-mentioned pulse signal, identifies data message and exports the control level signal to audio treatment unit R303.Audio treatment unit R303 is according to control level output or output audio signal not.
As stated, following some debugging is manually arranged in transmitting device:
Variable gain amplifier T02 (all adopting regulator potentiometer to realize change in gain), audio frequency potentiometer T04, pilot signal potentiometer T12, phase-locked loop pll T05 (adopting trimmer to regulate reference clock frequency), antenna match unit T09 (adopt trimmer or regulate inductance value).
Following some debugging is manually arranged in receiving device:
Phase-locked loop pll R104 (adopting trimmer to regulate reference clock frequency), demodulator R207 (adopt in the demodulation and week just regulate inductance value), variable gain amplifier R301 (adopting regulator potentiometer to realize change in gain).Field intensity signal processing unit R306 (adopting potentiometer to regulate).
In the prior art, above debug point all needs debugging manually, and workload greatly, all is to repeat same work during batch process, is unfavorable for raising the efficiency.
Summary of the invention
In view of above content, be necessary to provide a kind of method and corresponding detection system of the automatic debugging can realize that wireless microphone is produced the time.
The invention provides a kind of wireless microphone; Comprise transmitting device and receiving device; Said transmitting device comprises first variable gain amplifier, audio frequency potentiometer, pilot signal potentiometer, first phase-locked loop, antenna match unit; But said receiving device comprises second phase-locked loop, demodulator and second gain amplifier; Wherein first variable gain amplifier, audio frequency potentiometer and pilot signal potentiometer contain digital regulation resistance, and all by first microprocessor controls; Said first phase-locked loop and antenna match unit contain variable capacitance diode, and by first microprocessor controls.Second phase-locked loop and demodulator contain variable capacitance diode, and by second microprocessor controls; Said second variable gain amplifier contains digital regulation resistance, and all by second microprocessor controls.
In addition; The automatic debugging system that also has the above-mentioned wireless microphone of test; Comprise that transmitting device measurement jig, receiving device measurement jig, test use computer software with computer, test, and can be connected to computer and realization is controlled based on computer software instrument and equipment.
Preferably, to said wireless microphone automatic test approach, comprise the test of transmitting device and the test of receiving device.
The testing procedure of transmitting device comprises in the automatic debugging system adjustment method of wireless microphone: (1) fine setting high-frequency signal frequency; (2) adjustment first variable gain amplifier; (3) adjustment audio frequency potentiometer, (4) adjustment pilot tone potentiometer and (5) adjustment antenna match unit.
The testing procedure of receiving device comprises in the automatic debugging system adjustment method of wireless microphone: (1) adjustment first local oscillation signal frequency, (2) adjustment demodulator demodulates signal (3) adjustment second variable gain amplifier (4) field intensity signal and sets.
Compared with prior art, the present invention has following advantage:
In transmitting device, realized the automatic debugging of variable gain amplifier, audio frequency potentiometer T04, pilot signal potentiometer, phase-locked loop, antenna match unit.
In receiving device, realized the automatic debugging of phase-locked loop, demodulator, variable gain amplifier, field intensity signal.
Description of drawings
Combine embodiment that the present invention is done further description with reference to the accompanying drawings.
Fig. 1 is the transmitting device circuit theory calcspar of the general wireless microphone of prior art.
Fig. 2 is the receiving device circuit theory calcspar of the general wireless microphone of prior art.
Fig. 3 is the transmitting device circuit theory calcspar of wireless microphone of the present invention.
Fig. 4 is the receiving device circuit theory calcspar of wireless microphone of the present invention.
Embodiment
For regulator potentiometer, change potentiometer into digital regulation resistance (except the field intensity signal processing unit).Digital regulation resistance inner potential device partly is connected to original position potentiometer, and digital regulation resistance control partly is connected to microcontroller.By the microprocessor controls digital regulation resistance, change the potentiometer taper position, make the potentiometer amplitude output signal change, perhaps make amplifier input resistance, feedback resistance change and realize the amplifier gain adjusting.
For regulating trimmer, change trimmer into variable capacitance diode, the impulse level variable by the microcontroller output duty cycle become level and smooth voltage signal control through passive low ventilating filter.Change pulse duty factor and also just change the variable capacitance diode junction capacitance.Also can be the microprocessor controls digital regulation resistance, resistor part resistance two-end-point one end ground connection, a termination power in the digital regulation resistance, tap outputs level signals control variable capacitance diode.
Week or inductance value all are for the resonance point in the regulating circuit in the adjusting, also can also adopt the fixed inductance amount, and the mode of control capacittance just also can adopt the mode of variable capacitance diode to handle.
Field intensity signal is handled: remove the field intensity signal processing unit, field intensity signal is directly delivered to microcontroller.
Through above improvement, below main explanation test the Auto-Test System of installation elements PCB.Auto-Test System comprises that transmitting device measurement jig, receiving device measurement jig, test are with computer, test computer software.
Be this and accomplish test also need have suitable function, can be connected to computer and realize the instrument and equipment of control based on computer software.
Measurement jig all have fixing pcb board device, the bullet pin that can be connected to pcb board, the relay that is used to select signal, the microcontroller that is used to control, be used for the communication interface of computer communication and be connected to the signaling interface of instrument.
Transmitting device in conjunction with Fig. 3 illustrates the test that transmitting device is carried out:
1. finely tune the high-frequency signal frequency
Frequency meter is received high-frequency signal and is measured frequency data; Computer software compares through the value that cable, communication interface reading frequency instrumentation get frequency numerical value and setting, makes the judgement that increases or reduce frequency; And through the microcontroller on cable, communication interface, the measurement jig, play pin and send instructions to the microcontroller on the transmitting device; Microcontroller changes the output pulse duty factor, makes variable capacitance diode control change in voltage, and the phase-locked loop pll reference clock changes, final high-frequency signal frequency change; Meet range of set value up to the high-frequency signal frequency.The microcontroller that instructs on the transmitting device is accomplished in redispatch high-frequency signal frequency debugging of computer software, microcontroller with the pulse duty factor storage in EEPROM (Electrically Erasable Programmable Read Only Memo) EEPROM.
2. adjustment variable gain amplifier
Audio signal generator is connected to measurement jig, and audio signal is sent on the pcb board through stube cable, bullet pin.The bullet pin that is connected to the output of variable gain amplifier transmits signal to relay, and the microprocessor controls relay selects the output signal of variable gain amplifier to deliver to millivoltmeter through interface.Computer software reads millivoltmeter numerical value and the value comparison of setting, makes the judgement that increases or reduce the variable gain amplifier gain through cable, communication interface; And through the microcontroller on cable, communication interface, the measurement jig, play pin and send instructions to the microcontroller on the transmitting device; Digital regulation resistance in the microprocessor controls variable gain amplifier changes amplifier's gain.Meet range of set value up to amplifier output signal.The microcontroller that instructs on the transmitting device is accomplished in redispatch variable gain amplifier debugging of computer software, and microcontroller stores the setting data of digital regulation resistance among the EEPROM (Electrically Erasable Programmable Read Only Memo) EEPROM into.
3. adjust the audio frequency potentiometer
Just can adjust the audio frequency potentiometer after adjusting variable gain amplifier
Audio signal generator is connected to measurement jig, and audio signal is sent on the pcb board through stube cable, bullet pin.Transmitting device is modulated to audio signal high-frequency signal and passes through antenna transmission; The modulation degree tester is received the modulated high-frequency signal and is measured the modulation degree data.Computer software reads modulation degree data and the value comparison of setting, makes the judgement that increases or reduce modulation degree; And send instructions to the microcontroller on the transmitting device; Microprocessor controls control audio digital regulation resistance changes the audio frequency signal amplitude of importing voltage controlled oscillator, with degree of changing modulation degree.Meet range of set value up to modulation degree.The microcontroller that instructs on the transmitting device is accomplished in redispatch voice modulation degree debugging of computer software, and microcontroller stores the setting data of digital audio potentiometer among the EEPROM (Electrically Erasable Programmable Read Only Memo) EEPROM into.
4. adjust the pilot tone potentiometer
Pilot signal is produced by microcontroller, Gu Buxuyaoxinhaoyuan.
Transmitting device is modulated to pilot signal high-frequency signal and passes through antenna transmission; The modulation degree tester is received the modulated high-frequency signal and is measured the modulation degree data.Computer software reads modulation degree data and the value comparison of setting, makes the judgement that increases or reduce modulation degree; And send instructions to the microcontroller on the transmitting device; Microprocessor controls control pilot tone digital regulation resistance changes the pilot signal amplitude of importing voltage controlled oscillator, with degree of changing modulation degree.Meet range of set value up to modulation degree.The microcontroller that instructs on the transmitting device is accomplished in redispatch pilot modulated degree debugging of computer software, and microcontroller stores the setting data of pilot tone digital regulation resistance among the EEPROM (Electrically Erasable Programmable Read Only Memo) EEPROM into.
5. adjust the antenna match unit
Measure the transmitting device radiant power with the high-frequency signal power meter.With reference to 1, adjustment variable capacitance diode control voltage is adjusted to the radiation value maximum.Microcontroller storage pulse duty ratio data.Two above Frequency points be will measure here, low-limit frequency and highest frequency in the operating frequency range comprised at least.
Receiving device principle calcspar in conjunction with Fig. 4 illustrates the test of receiving device:
1. finely tune the first local oscillation signal frequency:
With reference to transmitting device 1.
2. the adjustment demodulator demodulates signal
The computer software control high frequency signal generator produces the high-frequency signal of modulated audio signal and delivers to the receiving device pcb board through high-frequency test bullet pin on cable, measurement jig interface, the measurement jig.The processing of circuit of this high-frequency signal through the demodulator front is second intermediate-freuqncy signal and delivers to demodulator.Computer software sends instructions to the microcontroller on the receiving device, makes variable capacitance diode control voltage change to maximum from minimum value.Computer software sends instructions to the measurement jig microcontroller, through the audio signal that relay selects demodulator to demodulate, delivers to millivoltmeter.Computer software reads millivoltmeter numerical value through cable, communication interface.Find best electrical voltage point, and the storage data are in EEPROM (Electrically Erasable Programmable Read Only Memo) EEPROM.
3. adjustment variable gain amplifier
The audio signal that above-mentioned demodulator demodulates is delivered to variable gain amplifier.Computer software sends instructions to the measurement jig microcontroller, through the output signal of relay selection variable gain amplifier, delivers to millivoltmeter.Computer software reads millivoltmeter numerical value and the value comparison of setting, makes the judgement that increases or reduce the variable gain amplifier gain through cable, communication interface; And through the microcontroller on cable, communication interface, the measurement jig, play pin and send instructions to the microcontroller on the receiving device; Digital regulation resistance in the microprocessor controls variable gain amplifier changes amplifier's gain.Meet range of set value up to amplifier output signal.The microcontroller that instructs on the receiving device is accomplished in redispatch variable gain amplifier debugging of computer software, and microcontroller stores the setting data of digital regulation resistance among the EEPROM (Electrically Erasable Programmable Read Only Memo) EEPROM into.
4. field intensity signal is set
The field intensity signal that above-mentioned demodulator demodulates is directly delivered to microcontroller, and microcontroller analog-to-digital conversion module (ADC) converts the field intensity signal electricity into data.Computer software sends instructions to the measurement jig microcontroller, through the output signal of relay selection audio treatment unit, delivers to the Signal-to-Noise-and-distortion ratio tester.Computer software reads Signal-to-Noise-and-distortion ratio tester numerical value through cable, communication interface.The computer software control high frequency signal generator, the adjustment high frequency signal amplitude.High frequency signal amplitude reduces, and Signal-to-Noise-and-distortion ratio reduces.When Signal-to-Noise-and-distortion ratio was reduced to set point, computer software sent the microcontroller of field intensity signal setting command to the receiving device, microcontroller with the field intensity signal storage in EEPROM (Electrically Erasable Programmable Read Only Memo) EEPROM.
The present invention is primarily aimed at wireless microphone and tests the improvement that implement device and method are carried out automatically; The above only is preferred embodiment of the present invention; Non-so promptly limit to claim of the present invention; So the simple and easy variation and the equivalent transformation of doing with specification of the present invention and graphic content such as all should be contained in the claim of the present invention.
Claims (5)
1. wireless microphone; Comprise transmitting device and receiving device; Said transmitting device comprises first variable gain amplifier, audio frequency potentiometer, pilot signal potentiometer, first phase-locked loop, antenna match unit; Said receiving device comprises second phase-locked loop, demodulator and second variable gain amplifier, it is characterized in that:
Said first variable gain amplifier, audio frequency potentiometer and pilot signal potentiometer contain digital regulation resistance, and all by first microprocessor controls; Said first phase-locked loop and antenna match unit contain variable capacitance diode, and by first microprocessor controls.
Said second phase-locked loop and demodulator contain variable capacitance diode, and by second microprocessor controls; Said second variable gain amplifier contains digital regulation resistance, and all by second microprocessor controls.
2. test the automatic debugging system of the said wireless microphone of claim 1; Comprise: transmitting device measurement jig, receiving device measurement jig, test use computer software with computer, test, and can be connected to computer and realization is controlled based on computer software instrument and equipment.
3. to the automatically debug method of the said wireless microphone of claim 1, comprise the test of transmitting device and the test of receiving device.
4. the automatically debug method of the said wireless microphone of claim 3; The testing procedure of wherein said transmitting device comprises: (1) fine setting high-frequency signal frequency; (2) adjustment first variable gain amplifier, (3) adjustment audio frequency potentiometer, (4) adjustment pilot tone potentiometer and (5) adjustment antenna match unit.
5. the automatically debug method of the said wireless microphone of claim 3; The testing procedure of wherein said receiving device comprises: (1) adjustment first local oscillation signal frequency; (2) adjustment demodulator demodulates signal (3) adjustment second variable gain amplifier (4) field intensity signal and sets.
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| CN2011101544998A CN102355620A (en) | 2011-06-09 | 2011-06-09 | Method for realizing automatic debugging of wireless microphone and automatic debugging system |
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| CN2011101544998A CN102355620A (en) | 2011-06-09 | 2011-06-09 | Method for realizing automatic debugging of wireless microphone and automatic debugging system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104618043A (en) * | 2014-12-22 | 2015-05-13 | 大唐半导体设计有限公司 | Receiver signal quality assessment method and device |
| CN109243414A (en) * | 2018-09-05 | 2019-01-18 | 厦门轻唱科技有限公司 | K sings system, wireless microphone and its signal transmitting apparatus |
| CN111625409A (en) * | 2020-05-15 | 2020-09-04 | 广东浪潮大数据研究有限公司 | Adjustable signal test fixture of bandwidth |
| CN113747336A (en) * | 2021-08-27 | 2021-12-03 | 音曼（北京）科技有限公司 | Method for tuning and adapting sound field in different spaces based on audio processor |
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| CN113747336A (en) * | 2021-08-27 | 2021-12-03 | 音曼（北京）科技有限公司 | Method for tuning and adapting sound field in different spaces based on audio processor |
| CN113747336B (en) * | 2021-08-27 | 2023-01-10 | 音曼（北京）科技有限公司 | Method for tuning and adapting sound field in different spaces based on audio processor |
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Application publication date: 20120215 |