CN209417150U - New type multipath resonance frequency test macro - Google Patents
New type multipath resonance frequency test macro Download PDFInfo
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- CN209417150U CN209417150U CN201822253548.3U CN201822253548U CN209417150U CN 209417150 U CN209417150 U CN 209417150U CN 201822253548 U CN201822253548 U CN 201822253548U CN 209417150 U CN209417150 U CN 209417150U
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- 238000012360 testing method Methods 0.000 title claims abstract description 36
- 238000005259 measurement Methods 0.000 claims abstract description 27
- 238000006243 chemical reaction Methods 0.000 claims description 35
- 238000013519 translation Methods 0.000 claims description 22
- 230000001360 synchronised effect Effects 0.000 claims description 19
- 230000005611 electricity Effects 0.000 claims description 9
- 238000005070 sampling Methods 0.000 claims description 7
- 230000009286 beneficial effect Effects 0.000 claims description 2
- 230000032683 aging Effects 0.000 abstract description 13
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000003079 width control Methods 0.000 description 1
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Abstract
The utility model relates to a kind of new type multipath resonance frequency test macros, including main control unit, display unit, key cell, signal source, multiway analog switch, multiple groups amplitude adjustment control circuit, several power amplifiers and Measurement channel, the display unit, key cell is connected with main control unit respectively, the main control unit respectively with multiway analog switch, multiple groups amplitude adjustment control circuit, power amplifier and Measurement channel are connected, the signal source is connected by multiway analog switch with multiple groups amplitude adjustment control circuit, the multiple groups amplitude adjustment control circuit is connected with several power amplifiers and Measurement channel.The utility model can measure it per F0 measurement, the F0 in each channel is carried out simultaneously all the way while mobile phone Microspeaker and micro-burst motor aging without timesharing again, and the testing time is extremely short, greatly improves the accuracy of testing efficiency and aging.
Description
Technical field
The utility model relates to a kind of test equipment more particularly to a kind of new type multipath resonance frequency test macros.
Background technique
Even if the same batch products of resonance frequency F0 when being worked due to mobile phone Microspeaker and micro-burst motor
Its F0 also can be variant, therefore needs to carry out in accuracy controlling Microspeaker and micro-burst motor by F0 certain
In high-end handsets application, resonance frequency F0 just needs to be measured one by one.
Utility model content
The purpose of this utility model is that on original multichannel F0 test circuit base, it is humorous to devise a kind of new type multipath
Vibration frequency test macro can often carry out simultaneously it while mobile phone Microspeaker and micro-burst motor aging all the way
The F0 of F0 measurement, each channel is measured without timesharing again, and the testing time is extremely short, greatly improves the standard of testing efficiency and aging
True property.
The utility model is achieved by the following technical solution: a kind of new type multipath resonance frequency test macro, including
Main control unit, display unit, key cell, signal source, multiway analog switch, multiple groups amplitude adjustment control circuit, several power amplifiers and
Measurement channel, the display unit, key cell are connected with main control unit respectively, the main control unit respectively with multichannel mould
Quasi- switch, multiple groups amplitude adjustment control circuit, power amplifier and Measurement channel are connected, and the signal source passes through multiway analog switch and multiple groups tune
Width control circuit is connected, and the multiple groups amplitude adjustment control circuit is connected with several power amplifiers and Measurement channel.
Wherein, the utility model designs power amplifier and Measurement channel, and the power amplifier and Measurement channel include from control
Device processed, frequency sweep circuit, amplitude adjustment control circuit, multi-channel analog switch circuit, power amplifier, voltage differential circuit, current-differencing electricity
Road, conversion circuit, voltage gain translation circuit, the synchronous analog-to-digital conversion circuit of current gain translation circuit and binary channels, it is described from
Analog-to-digital conversion circuit synchronous with main control unit, binary channels, voltage gain translation circuit, current gain transformation are electric respectively for controller
Road, frequency sweep circuit, amplitude adjustment control circuit and multi-channel analog switch circuit are connected, the amplitude adjustment control circuit respectively with multiple groups amplitude modulation
Control circuit, multi-channel analog switch circuit are connected, and the frequency sweep circuit is connected with multi-channel analog switch circuit, the multi-channel analog
Switching circuit is connected with power amplifier, and the power amplifier passes sequentially through current-differencing circuit, conversion circuit, current gain transformation
Circuit analog-to-digital conversion circuit synchronous with binary channels is connected, and power amplifier passes sequentially through voltage differential circuit, conversion circuit, voltage and increases
Beneficial translation circuit analog-to-digital conversion circuit synchronous with binary channels is connected.
In one preferred embodiment of the utility model, the multiway analog switch includes two multiway analog switches, described
Multiple groups amplitude adjustment control circuit includes A group channel amplitude adjustment control circuit and B group channel amplitude adjustment control circuit, one of multi-channel analog
Switch is connected by A group channel amplitude adjustment control circuit with 10 groups of power amplifiers and Measurement channel, another multiway analog switch passes through B
Group channel amplitude adjustment control circuit is connected with other 10 groups of power amplifiers and Measurement channel.
Wherein, A group channel amplitude adjustment control circuit and B group channel amplitude adjustment control circuit use the AD5443 digital-to-analogue of ADI
Conversion chip.
Wherein, the controller of the main control unit uses the LPC1768 processor of NXP.
Wherein, the LPC1114 processor that NXP is used from controller.
Wherein, the frequency sweep circuit uses the AD9833 of ADI.
Wherein, the power amplifier module uses the LM3886TF of NS.
Wherein, the voltage differential circuit uses INA146 chip, and current-differencing circuit uses INA128 chip；The electricity
Gain converting circuit is pressed to use PGA112 chip, current gain translation circuit uses PGA113 chip；The conversion circuit uses
The AD8436 RMS conversion chip of ADI.
Wherein, the synchronous analog-to-digital conversion circuit of the binary channels uses the ADS8361 binary channels synchronized sampling chip of TI.
Microspeaker and micro-burst motor are to apply signal by 20 road power amplifiers come long-time aging.In aging period
Between one group of swept-frequency signal can be cut aging power amplifier at regular intervals, carry out F0 sweep check and obtain F0 and save, due to being
Concurrent testing, therefore primary test can complete the F0 test of 20 tunnels load；Thus a F0 is devised in each channel
Dedicated DDS frequency sweep circuit, switching aging with F0 frequency sweep is realized using multi-channel analog switch circuit, and analog sampling circuit is then
Binary channels synchronized sampling conversion circuit has been used, has been read through arm processor, F0 is obtained after calculating and shows 20 drive test test results.
F0 that this system uses test has higher efficiency and accuracy compared with the mode that other another machines are tested, because
It is not tested only with Multi-path synchronous for this method, and the conversion between aging and test is not necessarily to manual intervention, can accomplish seamless
Conversion, greatly reduces artificial error probability, and to be further reduced erroneous judgement, this equipment has carried out multiple differentiation when F0 differentiates,
To prevent from judging by accident.
The specific measurement of each channel F0 is by determined by the relationship between impedance-frequency.In a certain frequency of low-frequency range
Its impedance value of rate is maximum, and corresponding frequency is referred to as the resonance frequency F0 of loudspeaker, i.e., in impedance curve upper speaker modulus of impedance
It is worth the corresponding frequency of first main peak risen with frequency.Therefore, impedance corresponding with frequency is accurately measured, so that it may really
Determine resonance frequency.The influence to test result because of external interference or load fluctuation itself when in order to eliminate test, this equipment is to every
The data sampled all the way are all filtered, and ensure that the stability of F0 result.
Detailed description of the invention
Fig. 1 is the functional block diagram of the new type multipath resonance frequency test macro of the utility model；
Fig. 2 is the power amplifier of the utility model and the functional block diagram of Measurement channel.
Specific embodiment
The preferred embodiment of the utility model is described in detail with reference to the accompanying drawing, so that the advantages of the utility model
It can be easier to be understood by those skilled in the art with feature, to make apparent specific boundary to the protection scope of the utility model
It is fixed.
A kind of new type multipath resonance frequency test macro as shown in Figure 1, including main control unit 21, display unit 22,
Key cell 23, signal source, multiway analog switch 24, multiway analog switch 25, A group channel amplitude adjustment control circuit 26, B group channel
Amplitude adjustment control circuit 27, power amplifier and Measurement channel 1-20, the display unit 22, key cell 23 respectively with main control unit 21
Be connected, the main control unit 21 respectively with multiway analog switch 24, multiway analog switch 25, A group channel amplitude adjustment control circuit
26, B group channel amplitude adjustment control circuit 27, power amplifier and Measurement channel 1-20 are connected, and the signal source includes sinusoidal signal 1, sine
Signal 2, MP3 signal pass through multiway analog switch 24, multiway analog switch 25 and A group channel amplitude adjustment control circuit 26, B group channel
Amplitude adjustment control circuit 27 is connected, A group channel amplitude adjustment control circuit 26, B group channel amplitude adjustment control circuit 27 and power amplifier and survey
Channel 1-20 is measured to be connected.
As shown in Fig. 2, the power amplifier and Measurement channel include from controller 29, F0 frequency sweep circuit 40, amplitude adjustment control circuit
39, multi-channel analog switch circuit 38, power amplifier 37, voltage differential circuit 36, current-differencing circuit 35, RMS-TO-DC conversion
Circuit 33, RMS-TO-DC conversion circuit 34, voltage gain translation circuit 32, current gain translation circuit 31 and binary channels are synchronous
Analog-to-digital conversion circuit 30, it is described from controller 29 analog-to-digital conversion circuit 30 synchronous with main control unit 21, binary channels, voltage respectively
Gain converting circuit 32, current gain translation circuit 31, frequency sweep circuit 40, amplitude adjustment control circuit 39 and multi-channel analog switch circuit
38 are connected, the amplitude adjustment control circuit 39 respectively with A group channel amplitude adjustment control circuit 26 or B group channel amplitude adjustment control circuit 27,
Multi-channel analog switch circuit 38 is connected, and the frequency sweep circuit 40 is connected with multi-channel analog switch circuit 38, and the multi-channel analog is opened
Powered-down road 38 is connected with power amplifier 37, and the power amplifier 37 passes sequentially through current-differencing circuit 35, RMS-TO-DC conversion electricity
Road 33, the analog-to-digital conversion circuit 30 synchronous with binary channels of current gain translation circuit 31 are connected, and power amplifier 37 passes sequentially through voltage
Difference channel 36, RMS-TO-DC conversion circuit 34, voltage gain translation circuit 32 30 phase of analog-to-digital conversion circuit synchronous with binary channels
Even.
The controller of this equipment main control unit 21 uses the LPC1768 processor of NXP；Signal source is broadly divided into: sinusoidal
Signal 1, sinusoidal signal 2, MP3 signal, wherein sinusoidal signal 1, sinusoidal signal 2 are all produced using the DDS chip AD9833 of ADI
It is raw；Multiway analog switch 24 and multiway analog switch 25 use analog switch ADG408；A group channel amplitude adjustment control unit 26, B
Group channel amplitude adjustment control unit 27 uses the AD5443 analog-digital chip of ADI；In power amplifier and Measurement channel 1-20, each
Channel all includes the following: the LPC1114 processor from controller 29 using NXP；F0 frequency sweep circuit 40 is using ADI's
AD9833；Amplitude adjustment control circuit 39 uses the AD5443 analog-digital chip of ADI；Multi-channel analog switch circuit 38 uses
ADG419；Power amplifier module 37 uses the LM3886TF of NS；Voltage differential circuit 36 uses INA146 chip；Current-differencing electricity
Road 35 uses INA128 chip；RMS-TO-DC conversion circuit 33 and 34 all uses the AD8436 RMS conversion core of ADI
Piece；Voltage gain translation circuit 32 uses PGA112 chip；Current gain translation circuit 31 uses PGA113 chip；Bilateral
Road synchronized AD converter 30 using TI ADS8361 binary channels synchronized sampling chip.
When carrying out F0 test to motor or loudspeaker, aging signal is switched to by multiway analog switch by F0 first
The DDS swept-frequency signal of test, voltage and current while frequency sweep on measurement loudspeaker or motor load, obtains it
In the impedance value of each frequency point, then calculate Frequency point, as F0 corresponding to first impedance maximum value.F0 sweep check is complete
Cheng Hou, analog switch first disconnect the DDS swept-frequency signal of F0 test, then are switched to aging signal, complete F0 measurement.Impedance is by Zi
=Ui/Ii is obtained:
Zi in formula --- the real-time impedance wherein loaded all the way
Ui --- load the real-time voltage on wherein loading all the way
Ii --- pass through the real-time current wherein loaded all the way.
The sampling resistor that 0.1 ohm is sealed in load circuit when swept-frequency signal is added in load, obtains sample resistance
The voltage at both ends rectifies, the real-time current value Ii=Ur/0.1 that can be loaded by amplification.The electricity at both ends will be loaded simultaneously
Pressure samples the real-time voltage Ui that can be loaded through over commutation, by AD.The real-time of load is obtained by Zi=(Ui/Ur) * 0.1
Impedance.
When work, user has set parameter and has run, and one in aging signal passes through multiway analog switch 24 or multichannel mould
Quasi- switch 25 is exported by selection, and it is big to adjust its signal by A group channel amplitude adjustment control circuit 26 or B group channel amplitude adjustment control circuit 27
It is small, after being sent into power amplifier and Measurement channel unit, then chooses input power amplifier to drive through multi-channel analog switch circuit 38 and load,
Carry out aging；When the F0 set by user monitoring period arrives, the signal that F0 frequency sweep circuit 40 generates is by multiway analog switch electricity
Road 38 inputs the driving load of power amplifier 37, and electric current difference channel 35 obtains the electric current of load on sample resistance, in load
Voltage differential circuit 36 obtains the voltage of load；Sinusoidal signal is converted direct current signal by RMS-TO-DC conversion circuit 33 and 34
And amplified respectively by current gain translation circuit 31 and voltage gain translation circuit 32, it is then sent into ADS8361 simultaneously
Binary channels synchronizes analog-to-digital conversion circuit 30, while sampling the voltage and current in load accurately to measure the impedance of load；MCU
Corresponding frequency being recorded while calculating impedance, then obtaining F0 after being filtered relatively, the key of sweep check is first
Positive frequency sweep is first carried out, one group of data is obtained, then carries out reversed frequency sweep again, can be subtracted by obtaining two groups of data of a positive and a negative
Error caused by few load shakes, more accurately measures F0.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it cannot be understood as the limitations to utility model patent range.It should be pointed out that for the common skill of this field
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The protection scope of the utility model.
Claims (10)
1. a kind of new type multipath resonance frequency test macro, it is characterised in that: including main control unit (21), display unit
(22), key cell (23), signal source, multiway analog switch, multiple groups amplitude adjustment control circuit, several power amplifiers and Measurement channel, institute
State display unit (22), key cell (23) is connected with main control unit (21) respectively, the main control unit (21) respectively with
Multiway analog switch, multiple groups amplitude adjustment control circuit, power amplifier and Measurement channel are connected, the signal source by multiway analog switch with
Multiple groups amplitude adjustment control circuit is connected, and the multiple groups amplitude adjustment control circuit is connected with several power amplifiers and Measurement channel.
2. new type multipath resonance frequency test macro according to claim 1, it is characterised in that: the power amplifier and measurement are logical
Road includes from controller (29), frequency sweep circuit (40), amplitude adjustment control circuit (39), multi-channel analog switch circuit (38), power amplifier electricity
Road (37), voltage differential circuit (36), current-differencing circuit (35), conversion circuit, voltage gain translation circuit (32), electric current increase
Beneficial translation circuit (31) and binary channels are synchronous analog-to-digital conversion circuit (30), it is described from controller (29) respectively with main control unit
(21), binary channels synchronizes analog-to-digital conversion circuit (30), voltage gain translation circuit (32), current gain translation circuit (31), sweeps
Frequency circuit (40), amplitude adjustment control circuit (39) and multi-channel analog switch circuit (38) are connected, the amplitude adjustment control circuit (39) point
It is not connected with multiple groups amplitude adjustment control circuit, multi-channel analog switch circuit (38), the frequency sweep circuit (40) and multiway analog switch
Circuit (38) is connected, and the multi-channel analog switch circuit (38) is connected with power amplifier (37), and the power amplifier (37) is successively
Pass through current-differencing circuit (35), conversion circuit (33), current gain translation circuit (31) analog-to-digital conversion electricity synchronous with binary channels
Road (30) is connected, and power amplifier (37) passes sequentially through voltage differential circuit (36), conversion circuit (34), voltage gain translation circuit
(32) analog-to-digital conversion circuit (30) synchronous with binary channels is connected.
3. new type multipath resonance frequency test macro according to claim 2, it is characterised in that: the multiway analog switch
Including multiway analog switch (24) and multiway analog switch (25), the multiple groups amplitude adjustment control circuit includes the amplitude modulation control of A group channel
Circuit (26) processed and B group channel amplitude adjustment control circuit (27), the multiway analog switch (24) pass through A group channel amplitude adjustment control electricity
Road (26) is connected with 10 groups of power amplifiers and Measurement channel, and the multiway analog switch (25) passes through B group channel amplitude adjustment control circuit
(27) it is connected with other 10 groups of power amplifiers and Measurement channel.
4. new type multipath resonance frequency test macro according to claim 3, it is characterised in that: A group channel amplitude modulation
Control circuit (26) and B group channel amplitude adjustment control circuit (27) use the AD5443 analog-digital chip of ADI.
5. new type multipath resonance frequency test macro according to claim 1, it is characterised in that: the main control unit
(21) controller uses the LPC1768 processor of NXP.
6. new type multipath resonance frequency test macro according to claim 2, it is characterised in that: described from controller (29)
Using the LPC1114 processor of NXP.
7. new type multipath resonance frequency test macro according to claim 2, it is characterised in that: the frequency sweep circuit (40)
Using the AD9833 of ADI.
8. new type multipath resonance frequency test macro according to claim 2, it is characterised in that: the power amplifier (37)
Using the LM3886TF of NS.
9. new type multipath resonance frequency test macro according to claim 2, it is characterised in that: the voltage differential circuit
(36) INA146 chip is used, current-differencing circuit (35) uses INA128 chip；The voltage gain translation circuit (32) is adopted
With PGA112 chip, current gain translation circuit (31) uses PGA113 chip；The conversion circuit is true using the AD8436 of ADI
RMS-DC converter chip.
10. new type multipath resonance frequency test macro according to claim 2, it is characterised in that: the binary channels is synchronous
Analog-to-digital conversion circuit (30) uses the ADS8361 binary channels synchronized sampling chip of TI.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822253548.3U CN209417150U (en) | 2018-12-29 | 2018-12-29 | New type multipath resonance frequency test macro |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822253548.3U CN209417150U (en) | 2018-12-29 | 2018-12-29 | New type multipath resonance frequency test macro |
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| Publication Number | Publication Date |
|---|---|
| CN209417150U true CN209417150U (en) | 2019-09-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822253548.3U Expired - Fee Related CN209417150U (en) | 2018-12-29 | 2018-12-29 | New type multipath resonance frequency test macro |
Country Status (1)
| Country | Link |
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| CN (1) | CN209417150U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112649666A (en) * | 2019-10-10 | 2021-04-13 | 北京比特大陆科技有限公司 | Frequency sweeping device and method for chip and electronic equipment |
| CN113311226A (en) * | 2021-04-30 | 2021-08-27 | 歌尔股份有限公司 | Resonance frequency detection method and device of vibration motor, terminal equipment and storage medium |
-
2018
- 2018-12-29 CN CN201822253548.3U patent/CN209417150U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112649666A (en) * | 2019-10-10 | 2021-04-13 | 北京比特大陆科技有限公司 | Frequency sweeping device and method for chip and electronic equipment |
| CN112649666B (en) * | 2019-10-10 | 2024-02-06 | 北京比特大陆科技有限公司 | Chip frequency sweeping device and method and electronic equipment |
| CN113311226A (en) * | 2021-04-30 | 2021-08-27 | 歌尔股份有限公司 | Resonance frequency detection method and device of vibration motor, terminal equipment and storage medium |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190920 |