CN106896237A - A kind of mobile phone d.c. motor rotating speed measurement method and device - Google Patents
A kind of mobile phone d.c. motor rotating speed measurement method and device Download PDFInfo
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- CN106896237A CN106896237A CN201710019502.2A CN201710019502A CN106896237A CN 106896237 A CN106896237 A CN 106896237A CN 201710019502 A CN201710019502 A CN 201710019502A CN 106896237 A CN106896237 A CN 106896237A
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- mobile phone
- rotating
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- distance
- proximity transducer
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
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- General Physics & Mathematics (AREA)
- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
Abstract
This application discloses a kind of mobile phone d.c. motor rotation-speed measuring device, the rotating speed for measuring the mobile phone d.c. motor that blade-rotating is non-circular metal, the device includes：Proximity transducer and measuring instrument, proximity transducer is installed on measuring instrument, measuring instrument includes workbench, display and built-in process circuit, set on workbench fluted, when mobile phone to be measured is positioned in groove, mobile phone d.c. motor is relative with proximity transducer, when the blade-rotating of mobile phone d.c. motor is rotated, the distance between blade-rotating outer surface and proximity transducer can change, when distance is less than or equal to default detecting distance, proximity transducer produces induced-current, when distance is more than default detecting distance, induced-current is gradually kept to zero, the measurement apparatus carry out amplitude detection by induced-current, the treatment such as frequency sampling and data conversion, quickly, the occurrence of the rotating speed of accurately measure mobile phone d.c. motor.
Description
Technical field
The application is related to areas of information technology, more particularly to a kind of mobile phone d.c. motor rotating speed measurement method and device.
Background technology
There is vibrating effect in order to allow mobile phone, interior of mobile phone is provided with d.c. motor so that mobile phone can be tuned into vibration mode
With with sense of touch.Mobile phone d.c. motor is welded on the pcb board or flexible PCB of interior of mobile phone, in order to detect mobile phone d.c. motor
Function it is whether normal and whether welding reliable, it is necessary to the rotating speed of testing mobile phone d.c. motor, conventional method is logical at present
Electric current that measurement mobile phone d.c. motor rotates is crossed whether in threshold range, range estimation mobile phone d.c. motor under power supply state whether
Rotate, and detect whether whether mobile phone d.c. motor vibrates to judge mobile phone d.c. motor rotating speed under power supply state with sensor
Normally.
Existing technology can not accurately detect rotating speed of the mobile phone d.c. motor under power supply state, and mobile phone direct current
The rotating speed of motor is different according to the mobile phone of application, and rotation speed requirements are also different, such as, the mobile phone requirement mobile phone of some brands is placed on flat
On face, after opening vibration, mobile phone can be rotated to be most preferably in the plane, if only judging whether whether mobile phone d.c. motor rotates and shake
It is dynamic, may prevent that rotating speed does not meet the mobile phone d.c. motor of design requirement from being detected, so as to influence the vibration of mobile phone
Function.
The content of the invention
The application provides a kind of mobile phone d.c. motor rotating speed measurement method and device, can quickly and accurately measure mobile phone
Specific tachometer value of the d.c. motor under power supply state, is easy to carry out mobile phone d.c. motor vibrating function in mobile phone production process
Quality testing.
According to the application's in a first aspect, the application provides a kind of mobile phone d.c. motor rotating speed measurement method, for measuring
Blade-rotating is the rotating speed of the mobile phone d.c. motor of non-circular metal, in the blade-rotating rotation process, blade-rotating outer surface and proximity transducer
The distance between change, including：In blade-rotating rotation process, using proximity transducer detection blade-rotating outer surface and close biography
The distance between sensor, when the distance be less than or equal to default detecting distance when, proximity transducer generation induced-current, when away from
During from more than default detecting distance, it is zero that induced-current is gradually smaller；Amplitude detection is carried out to the induced-current again to obtain
Corresponding square-wave signal；The frequency data sampled to the square-wave signal frequency and will sampled are converted to rotating speed, obtain final product
To mobile phone d.c. motor rotating speed.
According to the second aspect of the application, the application provides a kind of mobile phone d.c. motor rotation-speed measuring device, for measuring
Blade-rotating is the rotating speed of the mobile phone d.c. motor of non-circular metal, in the blade-rotating rotation process, blade-rotating outer surface and proximity transducer
The distance between change, including：Proximity transducer and measuring instrument, the proximity transducer are used to detect that the blade-rotating is rotated
During the distance between proximity transducer and blade-rotating outer surface, the generation when the distance is less than or equal to default detecting distance
Induced-current；When the distance is more than default detecting distance, the induced-current is gradually decreased as zero；The induced-current
Corresponding square-wave signal is obtained by amplitude detection, the measuring instrument is sampled to the square-wave signal frequency, will be sampled
To frequency data be converted to the rotating speed of mobile phone d.c. motor.
In certain embodiments, the proximity transducer includes:
Sensing coil, the distance between proximity transducer and blade-rotating outer surface in detection blade-rotating rotation process；
Oscillating circuit, when the blade-rotating outer surface is near the sensing coil, distance is less than or equal to default between the two
Detecting distance when, oscillating circuit produces induced-current, when the blade-rotating outer surface is away from the proximity transducer, between the two
When distance is more than default detecting distance, the induced-current is gradually decreased as zero.
In certain embodiments, the proximity transducer also includes that amplitude detecting circuit is used to detect faradic amplitude
Change generation square-wave signal.
In certain embodiments, the proximity transducer also includes level shifting circuit, for nursing one's health the square-wave signal
Level meeting the voltage range of receiving of MCU.
In certain embodiments, the measuring instrument includes waver, for detecting the faradic amplitude, and
It is converted into square-wave signal by sinusoidal signal.
In certain embodiments, the waver, is additionally operable to nurse one's health the level of the square-wave signal to meet MCU's
Voltage range of receiving.
In certain embodiments, the measuring instrument includes that MCU is used to recognize the square-wave signal, to the square-wave signal
The frequency data that frequency is sampled and will sampled are converted to rotating speed, i.e. mobile phone d.c. motor rotating speed.
In certain embodiments, the measuring instrument includes analog-digital converter, data sampling unit and CPU；The modulus turns
The induced-current is converted to data signal by parallel operation by analog signal, and the data sampling unit is to by the data signal
The frequency data that frequency is sampled and will sampled are sent to CPU, and the frequency data are converted to rotating speed, i.e. mobile phone by CPU
D.c. motor rotating speed.
In certain embodiments, the measuring instrument also includes workbench, and for placing mobile phone to be measured, mobile phone to be measured is positioned over
During the workbench, mobile phone d.c. motor is relative with the proximity transducer.
The beneficial effect of the application is：The mobile phone d.c. motor rotating speed measurement method that the application is provided is due to using close biography
In sensor detection mobile phone d.c. motor blade-rotating rotation process, the change of the distance between non-circular blade-rotating and proximity transducer, when away from
During from less than or equal to default detecting distance so that proximity transducer generates corresponding induced-current, when distance is more than default
Detecting distance when, it is zero that induced-current is gradually smaller；Again corresponding square wave is obtained by carrying out amplitude detection to induced-current
Signal, the square wave signal frequency can directly reflect the rotating speed of mobile phone d.c. motor, by square wave signal frequency carry out sampling and
Conversion, just can quickly and accurately obtain specific tachometer value of the mobile phone d.c. motor under power supply state, and the method realizes device
Convenient, accuracy is high, low cost, improves the efficiency detected to mobile phone d.c. motor vibrating function in mobile phone production process.
Brief description of the drawings
A kind of mobile phone d.c. motor rotation-speed measuring device structural representation that Fig. 1 is provided for the application；
A kind of mobile phone d.c. motor rotation-speed measuring device composition frame chart that Fig. 2 is provided for the application；
A kind of mobile phone DC motor structure schematic diagram that Fig. 3 is provided for the application；
In the mobile phone d.c. motor rotation process that Fig. 4 is provided for the application, blade-rotating outer surface is mutual with proximity transducer
Position view；
In the mobile phone d.c. motor rotation process that Fig. 5 is provided for the application, each waveform timing variations figure；
Another mobile phone d.c. motor rotation-speed measuring device composition frame chart that Fig. 6 is provided for the application；
Another mobile phone d.c. motor rotation-speed measuring device composition frame chart that Fig. 7 is provided for the application.
Specific embodiment
The application is described in further detail below by specific embodiment combination accompanying drawing.
Embodiment one：
Fig. 1 is refer to, is a kind of mobile phone d.c. motor rotation-speed measuring device that the application is provided, be non-for measuring blade-rotating
The rotating speed of the mobile phone d.c. motor of circular metal, the device includes：Proximity transducer 10 and measuring instrument 1.
Proximity transducer 10 is installed on measuring instrument 1, in d.c. motor blade-rotating rotation process, blade-rotating outer surface and close to pass
The distance between sensor 10 can change, proximity transducer 10 be used for detect between blade-rotating outer surface and proximity transducer away from
From when distance is less than or equal to default detecting distance, proximity transducer 10 produces induced-current.
Specifically, as shown in Fig. 2 proximity transducer 10 includes:Sensing coil 11 and oscillating circuit 12.
Sensing coil 11, the distance between proximity transducer 10 and the outer surface of blade-rotating 50 in the detection rotation process of blade-rotating 50；
Oscillating circuit 12, is lc circuit, and the coil L of oscillating circuit produces a high frequency magnetic field, when the outer surface of blade-rotating 50 is leaned on
Nearly sensing coil 11, when distance is less than or equal to default detecting distance between the two, oscillating circuit 12 produces induced-current (whirlpool
Electric current), when the outer surface of blade-rotating 50 is away from sensing coil 11, when distance is more than default detecting distance between the two, induced-current
It is gradually decreased as zero.
Measuring instrument 1 includes workbench 60, display 40 and built-in process circuit；Set fluted on workbench 60,
When mobile phone to be measured 5 is positioned in groove, mobile phone d.c. motor 5 is relative with proximity transducer 10, and the blade-rotating of mobile phone d.c. motor turns
When dynamic, measuring instrument 1 carries out the signals such as amplitude detection, frequency sampling and data conversion by built-in process circuit to induced-current
Treatment, measures the rotating speed of mobile phone d.c. motor 5, and show on the display 40.
Specifically, as shown in Fig. 2 built-in process circuit includes：Waveform changing circuit 20 and MCU30.
Waveform changing circuit 20 is used to detect faradic amplitude, and it is converted into square-wave signal by sinusoidal signal,
And the level of square-wave signal is nursed one's health to meet the voltage range of receiving of MCU30.
MCU30 is used to recognize square-wave signal that the frequency data sampled to the frequency of square-wave signal and will sampled to turn
It is changed to rotating speed, i.e. mobile phone d.c. motor rotating speed.
As shown in figure 3, a kind of DC motor structure schematic diagram provided for the application, the blade-rotating of the mobile phone d.c. motor 5
50 is half-round metal, including：Blade-rotating curved surface 501 and blade-rotating plane 502.
It is pointed out that the mobile phone d.c. motor rotation-speed measuring device that the application is provided, is not limited to blade-rotating for semicircle
The mobile phone d.c. motor of shape metal, any metal material, non-circular blade-rotating mobile phone d.c. motor can with the device come
Test its rotating speed, such as the mobile phone d.c. motor with sector, rectangle, square, ellipse or triangle blade-rotating.
As shown in figure 4, in the rotation process of blade-rotating 50, blade-rotating curved surface 501 or blade-rotating plane 502 can periodically be close to and connect
Nearly sensing coil 11 so that the distance between the outer surface of blade-rotating 50 and proximity transducer 10 change, wherein, in the T1 times
In section, blade-rotating curved surface 501 is near sensing coil 11 so that the distance between the outer surface of blade-rotating 50 and proximity transducer 10 compared with
Closely, less than or equal to default detecting distance；Within the T2 time periods, blade-rotating plane 502 is near sensing coil 11 so that blade-rotating
The distance between 50 outer surface and proximity transducer 10 farther out, more than default detecting distance.
As shown in figure 5, in the mobile phone d.c. motor rotation process provided for the application, each waveform timing variations figure.Blade-rotating
The time for rotating 1 circle is T1+T2, and within the T1 time periods, it is the induced-current of sinusoidal signal that oscillating circuit 12 produces waveform, in T2
In time period, induced-current is gradually decreased as zero；After waveform changing circuit 20 receives induced-current, by induced-current by sine
Signal is converted to square-wave signal, and level to square-wave signal is overturn and compressed amplitude and received with meeting the voltage of MCU30
Scope so that square-wave signal is low level within the T1 time periods, square-wave signal is high level in the T2 time periods, and hereafter MCU30 is again
Square-wave signal frequency after level conversion is sampled, so as to obtain mobile phone d.c. motor according to the frequency data for sampling
Rotating speed.
If for example, the frequency f=10Hz of square-wave signal, illustrating that square-wave signal has done the change of 10 second periodicities in one second,
Faradic amplitude has changed 10 times in one second, and 10 (T1+T2)=1sec, i.e. blade-rotating have rotated 10 at one second in kind
Circle, it is known that, mobile phone d.c. motor rotating speed n=10r/sec.
Based on said apparatus, present invention also provides a kind of mobile phone d.c. motor rotating speed measurement method, measurement blade-rotating is non-
The rotating speed of the mobile phone d.c. motor of circular metal, including：
In blade-rotating rotation process, detected between the outer surface of blade-rotating 50 and proximity transducer 10 first with proximity transducer 10
Distance, when the distance be less than or equal to default detecting distance when, proximity transducer 10 generates corresponding induced-current, when away from
During from more than default detecting distance, it is zero that induced-current is gradually smaller；
Amplitude detection is carried out to induced-current again and obtains corresponding square-wave signal；
Finally, the frequency of square-wave signal is sampled and the frequency data that will sample is converted to rotating speed, obtained final product in one's hands
Machine d.c. motor rotating speed；Specifically, the square-wave signal frequency of analog signal form is directly sampled using MCU30, so as to obtain
Its frequency data is obtained, then frequency data are converted into rotating speed.
As can be seen here, the application is provided mobile phone d.c. motor rotating speed measurement method and device, can quickly and accurately measure
Go out specific tachometer value of the mobile phone d.c. motor under power supply state, be easy to enter mobile phone d.c. motor function in mobile phone production process
Row detection and examination.
Embodiment two：
Because proximity transducer 10 has variety classes, including induction type, capacitance-type, ultrasonic type, photoelectric type, magnetic
Power type etc., in the detection mode for producing sensor circuit, the whirlpool produced in the metallic object of blade-rotating 50 is caused using electromagnetic induction
The mode of the induced-current size variation that the mode of electric current, the surface of blade-rotating 50 cause when close and the mode of directing switch etc., with
Upper proximity transducer 10 is applied to mobile phone d.c. motor rotating speed measurement method and device that the application is provided.
In one embodiment, proximity transducer 10 will also can directly export square-wave signal so that the built-in place of measuring instrument 1
Reason circuit does not include waveform changing circuit 20.
As shown in fig. 6, proximity transducer 10 includes:Sensing coil 11, oscillating circuit 12, amplitude detecting circuit 13 and level
Change-over circuit 14.
Sensing coil 11, the distance between proximity transducer 10 and the outer surface of blade-rotating 50 in the detection rotation process of blade-rotating 50；
Oscillating circuit 12, is lc circuit, and the coil L of oscillating circuit produces a high frequency magnetic field, when the outer surface of blade-rotating 50 is leaned on
Nearly sensing coil 11, when distance is less than or equal to default detecting distance between the two, oscillating circuit 12 produces induced-current (whirlpool
Electric current), when the outer surface of blade-rotating 50 is away from sensing coil 11, when distance is more than default detecting distance between the two, induced-current
It is gradually decreased as zero；
Amplitude detecting circuit 13, for detecting faradic amplitude change generation square-wave signal；Specifically, amplitude detection
Circuit 13 receives the induced-current shown in Fig. 5, the square-wave signal shown in output Fig. 5；
Level shifting circuit 14, for the voltage range of receiving for nursing one's health the level of the square-wave signal to meet MCU；Specifically
Ground, amplitude detecting circuit 13 receives the square-wave signal shown in Fig. 5, the square-wave signal after level conversion shown in output Fig. 5.
As shown in fig. 6, the built-in process circuit of measuring instrument 1 does not include waveform changing circuit, MCU30 is directly received close to biography
Square-wave signal after the level conversion of the output of sensor 10, samples to the signal frequency, and the frequency data that will be sampled turn
Rotating speed is changed to, mobile phone d.c. motor rotating speed is obtained final product.
Embodiment three：
Embodiment one is with tester in embodiment two directly the square-wave signal of analog signal form is carried out using MCU
Sampling, in one embodiment, uses alternative solution：Square-wave signal is first carried out into analog-to-digital conversion, then to digital signal samples.
As shown in fig. 6, proximity transducer 10 includes:Sensing coil 11, oscillating circuit 12 and amplitude detecting circuit 13.
Sensing coil 11, the distance between proximity transducer 10 and the outer surface of blade-rotating 50 in the detection rotation process of blade-rotating 50；
Oscillating circuit 12, is lc circuit, and the coil L of oscillating circuit produces a high frequency magnetic field, when the outer surface of blade-rotating 50 is leaned on
Nearly sensing coil 11, when distance is less than or equal to default detecting distance between the two, oscillating circuit 12 produces induced-current (whirlpool
Electric current), when the outer surface of blade-rotating 50 is away from sensing coil 11, when distance is more than default detecting distance between the two, induced-current
It is gradually decreased as zero；
Amplitude detecting circuit 13, for detecting faradic amplitude change generation square-wave signal；Specifically, amplitude detection
Circuit 13 receives the induced-current shown in Fig. 5, the square-wave signal shown in output Fig. 5.
As shown in fig. 6, the built-in process circuit of measuring instrument 1 includes:Analog-digital converter 31, the and of data sampling unit 32
CPU33。
Analog-digital converter 31 receives the square-wave signal of the output of proximity transducer 10, and square-wave signal is converted to by analog signal
Data signal；
Data sampling unit 32 is sampled to the digital signal frequency obtained after analog-to-digital conversion, then the frequency that will be sampled
Data is activation is to CPU33；
Frequency data are converted to rotating speed by CPU33, obtain final product mobile phone d.c. motor rotating speed.
Device based on the present embodiment, measures present invention also provides a kind of mobile phone d.c. motor rotating speed measurement method
Blade-rotating is the mobile phone d.c. motor rotating speed of non-circular metal, including：
In blade-rotating rotation process, detected between the outer surface of blade-rotating 50 and proximity transducer 10 first with proximity transducer 10
Distance, when the distance be less than or equal to default detecting distance when, proximity transducer 10 generates corresponding induced-current；
Amplitude detection is carried out to induced-current again and obtains corresponding square-wave signal；
Finally, the frequency of square-wave signal is sampled and the frequency data that will sample to be converted to rotating speed, i.e. mobile phone straight
Stream motor rotary speed；Specifically, by square-wave signal analog-to-digital conversion it is first data signal, then the digital signal frequency after conversion is carried out
Sampling obtains frequency data, then frequency data are converted into rotating speed.
As can be seen here, the application is provided mobile phone d.c. motor rotating speed measurement method and device, can be used different embodiment party
Formula quickly and accurately measures specific tachometer value of the mobile phone d.c. motor under power supply state.
Above content is to combine the further description that specific embodiment is made to the application, it is impossible to assert this Shen
Specific implementation please is confined to these explanations.For the application person of an ordinary skill in the technical field, do not taking off
On the premise of conceiving from the present application, some simple deduction or replace can also be made.
Claims (10)
1. a kind of mobile phone d.c. motor rotating speed measurement method, for measuring turning for mobile phone d.c. motor that blade-rotating is non-circular metal
Speed, in the blade-rotating rotation process, the distance between blade-rotating outer surface and proximity transducer change, it is characterised in that including：
In blade-rotating rotation process, first with the distance between proximity transducer detection blade-rotating outer surface and proximity transducer, when this away from
During from less than or equal to default detecting distance, proximity transducer generation induced-current, when distance is more than default detecting distance
When, it is zero that induced-current is gradually smaller；Amplitude detection is carried out to the induced-current again and obtains corresponding square-wave signal；Finally,
The frequency data sampled to the square-wave signal frequency and will sampled are converted to rotating speed, obtain final product mobile phone d.c. motor and turn
Speed.
2. a kind of mobile phone d.c. motor rotation-speed measuring device, for measuring turning for mobile phone d.c. motor that blade-rotating is non-circular metal
Speed, in the blade-rotating rotation process, the distance between blade-rotating outer surface and proximity transducer change, it is characterised in that including：
Proximity transducer and measuring instrument, the proximity transducer are used to detect in the blade-rotating rotation process outside proximity transducer and blade-rotating
The distance between surface, induced-current is produced when the distance is less than or equal to default detecting distance；When the distance is more than
During default detecting distance, the induced-current is gradually decreased as zero；The induced-current is obtained accordingly by amplitude detection
Square-wave signal, the measuring instrument is sampled to the square-wave signal frequency, and the frequency data that sampling is obtained are converted into mobile phone
The rotating speed of d.c. motor.
3. device as claimed in claim 2, it is characterised in that the proximity transducer includes:
Sensing coil, the distance between proximity transducer and blade-rotating outer surface in detection blade-rotating rotation process；
Oscillating circuit, when the blade-rotating outer surface is near the sensing coil, distance is less than or equal to default inspection between the two
Find range from when, oscillating circuit produces induced-current, when the blade-rotating outer surface is away from the proximity transducer, distance between the two
During more than default detecting distance, the induced-current is gradually decreased as zero.
4. device as claimed in claim 3, it is characterised in that the proximity transducer also includes that amplitude detecting circuit is used to examine
Survey faradic amplitude change generation square-wave signal.
5. device as claimed in claim 4, it is characterised in that the proximity transducer also includes level shifting circuit, is used for
The level of the square-wave signal is nursed one's health to meet the voltage range of receiving of MCU.
6. device as claimed in claim 3, it is characterised in that the measuring instrument includes waver, it is described for detecting
Faradic amplitude, and it is converted into square-wave signal by sinusoidal signal.
7. device as claimed in claim 6, it is characterised in that the waver is additionally operable to nurse one's health the square-wave signal
Level is meeting the voltage range of receiving of MCU.
8. the device as described in claim 4 or 7, it is characterised in that the measuring instrument includes that MCU is used to recognize the square wave letter
Number, the frequency data sampled to the frequency of the square-wave signal and will sampled are converted to rotating speed, i.e. mobile phone d.c. motor
Rotating speed.
9. device as claimed in claim 3, it is characterised in that the measuring instrument includes analog-digital converter, data sampling unit
And CPU；The induced-current is converted to data signal, the data sampling unit pair by the analog-digital converter by analog signal
The frequency data that the frequency of the data signal is sampled and will sampled are sent to CPU, CPU turns the frequency data
It is changed to rotating speed, i.e. mobile phone d.c. motor rotating speed.
10. the device as described in any one of claim 2 to 8, it is characterised in that the measuring instrument also includes workbench, uses
In mobile phone to be measured is placed, when mobile phone to be measured is positioned over the workbench, mobile phone d.c. motor is relative with the proximity transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710019502.2A CN106896237A (en) | 2017-01-11 | 2017-01-11 | A kind of mobile phone d.c. motor rotating speed measurement method and device |
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| CN201710019502.2A CN106896237A (en) | 2017-01-11 | 2017-01-11 | A kind of mobile phone d.c. motor rotating speed measurement method and device |
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| CN106896237A true CN106896237A (en) | 2017-06-27 |
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| CN201710019502.2A Pending CN106896237A (en) | 2017-01-11 | 2017-01-11 | A kind of mobile phone d.c. motor rotating speed measurement method and device |
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