CN106767992B - Hall switch sensor copped wave delay measuring method and system - Google Patents
Hall switch sensor copped wave delay measuring method and system Download PDFInfo
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- CN106767992B CN106767992B CN201710140951.2A CN201710140951A CN106767992B CN 106767992 B CN106767992 B CN 106767992B CN 201710140951 A CN201710140951 A CN 201710140951A CN 106767992 B CN106767992 B CN 106767992B
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Abstract
Present invention discloses a kind of Hall switch sensor copped wave delay measuring methods, comprising: powers for magnet ring, it is made to start to rotate；DC power supply is Hall sensor power supply；Oscillograph is opened, the waveform of output signal VOUT is observed；VOUT waveform is the square wave of a random period；Setting oscillograph is triggering mode, uses the rising edge of above-mentioned square wave as triggering edge, opens simultaneously the twilight sunset display function of oscillograph；Due to opening twilight sunset display function, these failing edges are all shown in oscillograph screen, form a band-like twilight sunset；If the rotation period of magnet ring and copped wave sampling period are precisely integral multiple relation, set then failing edge will appear in fixed bit, therefore the revolving speed of magnet ring need to be adjusted, so that the twilight sunset width of failing edge reaches maximum；The failing edge twilight sunset width of measurement sensor output waveform at this time, i.e., the time difference of earliest failing edge and failing edge the latest, as copped wave postpone TCD.The present invention can reduce hardware device cost, and measuring process is simple.
Description
Technical field
The invention belongs to sensor technical field, it is related to a kind of Hall sensor more particularly to a kind of Hall switch passes
Sensor copped wave delay measuring method；Meanwhile the invention further relates to a kind of Hall switch sensor copped wave delay measurements systems.
Background technique
Hall sensor is a kind of Magnetic Sensor made according to Hall effect.Hall sensor is divided into Hall switch biography
Sensor and linear hall sensor two major classes.Wherein Hall switch sensor can be realized the distance function such as detection, velocity measuring
Can, it is widely used in Industry Control, the fields such as detection technique and information processing are especially applied in DC brushless motor etc.
In, Hall switch sensor is its core element, and the market demand is very huge.
The working characteristics of Hall switch sensor is as shown in Figure 1.Abscissa indicates sensor proximity magnetic field strength B, indulges
Coordinate representation sensor output voltage VOUT.As B > BOP, VOUT is low level (BOP is known as magnetic operating point threshold value)；When B <
When BRP, VOUT is high level (BRP is known as magnetic point of release threshold value)；As BRP < B < BOP, VOUT depends on the value of previous state,
Both possible height may also be low.
Copped wave delay is one of key technical index of Hall switch sensor." copped wave " technology (chopping) is one
The circuit design technique that kind is widely used in Hall sensor eliminates zero input drift of analog circuit by multiple repairing weld
It moves.Since the sampling period of wave chopping technology is limited (cannot be infinitely small), the variation that sensor exports VOUT can only be every
Any time that secondary sampling instant is updated, and can not be pin-pointed between double sampling.For example as shown in Fig. 2, if
The adjacent double sampling moment of copped wave is respectively t1 and t2, and in tx moment environmental magnetic field B=BOP.If without copped wave (ideal feelings
Condition), then VOUT will become low level at the tx moment at once, but because VOUT can only be updated in sampling instant, therefore must wait until
The t2 moment can just be lower level.Any time between t1 to t2 is appeared randomly in due to tx, this allows for practical overturning moment t2
There is a random delay between ideal overturning moment tx.When tx is close to t1, this random delay has maximum value, here it is
Copped wave postpones (TCD).
When applying in the environment such as motor, due to the presence of copped wave delay, even if motor at the uniform velocity rotates, sensor output
The overturning moment of VOUT can also have random delay, and the period is not fixed, as shown in Figure 3.Rotor has several pairs of magnetic poles, N
Extremely nearby magnetic field BN<BRP, S extremely nearby magnetic field BS>BOP.Ideal output is the square-wave signal of fixed cycle at this time, and practical defeated
The period of VOUT is influenced by copped wave delay and becomes random out.With this VOUT signal go control motor rotation when, VOUT with
Machine overturns the control efficiency that will be greatly reduced motor, the overall performance of limiting motor work.
Existing Hall switch sensor test method is relatively simple: sensor is placed in static magnetic field environment,
Slowly change magnetic field strength, magnetic field strength when record VOUT becomes low level from high level is BOP；VOUT is recorded by low level
Magnetic field strength when becoming high level is BRP.Copped wave delay is not easy straight due to being related to the sampled signal of sensor internal circuit
It connects test to obtain, therefore there is presently no the validity test methods for copped wave delay.
Summary of the invention
The technical problems to be solved by the present invention are: a kind of Hall switch sensor copped wave delay measuring method is provided,
Hardware device cost can be reduced, measuring process is simple.
In addition, hardware device can be reduced the present invention also provides a kind of Hall switch sensor copped wave delay measurements system
Cost, measuring process are simple.
In order to solve the above technical problems, the present invention adopts the following technical scheme:
A kind of Hall switch sensor copped wave delay measuring method, the measurement method include:
Step S1, it powers to magnet ring, it is made to start to rotate；To DC power supply, suitable supply voltage, supply voltage are set
For 3V~30V, power to Hall sensor；
Step S2, oscillograph is opened, the waveform of output signal VOUT is observed；The influence of copped wave delay, observation are received at this time
The VOUT waveform arrived is the square wave of a random period；
Step S3, setting oscillograph is triggering mode, uses the rising edge of square wave in step S2 as triggering edge, opens simultaneously
The twilight sunset display function of oscillograph, twilight sunset show that the time is set as infinitely great or setting time, setting time be more than or equal to 3 seconds,
The appropriate screen that adjusts shows time scale, and wherein BX is environmental magnetic field intensity, dull in this experiment to increase；BOP is magnetic work
Point threshold value is steady state value；BX initial time is less than BOP, and the final moment can be greater than BOP；The sensor output shown on oscillograph
Waveform is VOUT.R is the rising edge for triggering in VOUT waveform, and failing edge will occur in VOUT after a period of time, according to
Chronological order, these possible failing edge appearance positions are respectively A, B, C, D ... E, F；It is shown due to opening twilight sunset
Function, these failing edges are all shown in oscillograph screen, form a band-like twilight sunset；If rotation period and the copped wave of magnet ring
Sampling period is precisely integral multiple relation, sets, therefore need to adjust the revolving speed of magnet ring, makes then failing edge will appear in fixed bit
The twilight sunset width for obtaining failing edge reaches maximum；Twilight sunset width (earliest failing edge and the failing edge the latest of A to F are measured at this time
Time difference), as copped wave postpone TCD；
The level of VOUT can only be updated in the copped wave sampling instant of sensor, when environmental magnetic field is just beyond BOP,
The tA moment, if just encountering copped wave sampling instant, it is assumed that VOUT starts as high level, then VOUT just becomes low level, for most
A failing edge being early likely to occur；If copped wave sampling does not occur in tA, and just occurs until tB, then failing edge will
Present in B, and so on；Under worst condition, before copped wave sampling instant just appears in the tA moment, then having to wait for down
One copped wave sampling, i.e., tF moment, VOUT can just become low level, for the failing edge position being likely to occur the latest；So A to F
Time span be copped wave delay.
Alternatively, setting oscillograph is triggering mode, uses the failing edge of square wave in step S2 as triggering edge, open simultaneously and show
The twilight sunset display function of wave device, twilight sunset show that the time is set as infinitely great or setting time, and setting time is to fit more than or equal to 3 seconds
Time scale is shown when adjusting screen；Wherein BX is environmental magnetic field intensity, dull in this experiment to reduce；BRP is magnetic point of release
Threshold value is steady state value；BX initial time is greater than BRP, and the final moment can be less than BOP；The sensor output wave shown on oscillograph
Shape is VOUT.R is the failing edge for triggering in VOUT waveform, and rising edge will occur in VOUT after a period of time, according to when
Between sequencing, these possible rising edge appearance positions are respectively A, B, C, D ... E, F；Function is shown due to opening twilight sunset
Can, these rising edges are all shown in oscillograph screen, form a band-like twilight sunset；If the rotation period of magnet ring and copped wave are adopted
The sample period is precisely integral multiple relation, is set then rising edge will appear in fixed bit, therefore need to adjust the revolving speed of magnet ring, so that
The twilight sunset width of rising edge reaches maximum；Persistence width (earliest rising edge and the rising the latest of A to F are measured at this time
The time difference on edge), as copped wave postpones TCD.
A kind of Hall switch sensor copped wave delay measuring method, the measurement method include:
Step S1, it powers to magnet ring, it is made to start to rotate；Suitable supply voltage is set to DC power supply, is passed to Hall
Sensor power supply；
Step S2, oscillograph is opened, the waveform of output signal VOUT is observed；The influence of copped wave delay, observation are received at this time
The VOUT waveform arrived is the square wave of a random period；
Step S3, setting oscillograph is triggering mode, uses the rising edge of the square wave in step S2 as triggering edge, beats simultaneously
The twilight sunset display function of oscillograph is opened, twilight sunset shows that the time is set as infinitely great or setting time, and setting time is more than or equal to 3
Second, the appropriate screen that adjusts shows time scale, and wherein BX is environmental magnetic field intensity, dull in this experiment to increase；BOP is magnetic work
Make point threshold value, is steady state value；BX initial time is less than BOP, and the final moment can be greater than BOP；The sensor shown on oscillograph is defeated
Waveform is VOUT out.R is the rising edge for triggering in VOUT waveform, and failing edge will occur in VOUT after a period of time, is pressed
According to chronological order, these possible failing edge appearance positions are respectively A, B, C, D ... E, F；It is aobvious due to opening twilight sunset
Show function, these failing edges are all shown in oscillograph screen, form a band-like twilight sunset；If being noted that turning for magnet ring
Dynamic period and copped wave sampling period are precisely integral multiple relation, are set then failing edge will appear in fixed bit, therefore need to adjust
The revolving speed of magnet ring, so that the twilight sunset width of failing edge reaches maximum；Measure at this time A to F twilight sunset width (earliest failing edge and
The time difference of failing edge the latest), as copped wave postpones TCD；
Alternatively, setting oscillograph is triggering mode, uses the failing edge of square wave in step S2 as triggering edge, open simultaneously and show
The twilight sunset display function of wave device, twilight sunset show that the time is set as infinitely great or setting time, and setting time is to fit more than or equal to 3 seconds
Time scale is shown when adjusting screen, and wherein BX is environmental magnetic field intensity, dull in this experiment to reduce；BRP is magnetic point of release
Threshold value is steady state value；BX initial time is greater than BRP, and the final moment can be less than BOP；The sensor output wave shown on oscillograph
Shape is VOUT.R is the failing edge for triggering in VOUT waveform, and rising edge will occur in VOUT after a period of time, according to when
Between sequencing, these possible rising edge appearance positions are respectively A, B, C, D ... E, F；Function is shown due to opening twilight sunset
Can, these rising edges are all shown in oscillograph screen, form a band-like twilight sunset；If the rotation period of magnet ring and copped wave are adopted
The sample period is precisely integral multiple relation, is set then rising edge will appear in fixed bit, therefore need to adjust the revolving speed of magnet ring, so that
The twilight sunset width of rising edge reaches maximum；Twilight sunset width (earliest rising edge and the rising edge the latest of A to F are measured at this time
Time difference), as copped wave postpones TCD.
As a preferred solution of the present invention, in step S1, supply voltage is 3V~30V.
A kind of Hall switch sensor copped wave delay measurements system, which is characterized in that the measuring system include: including
One device, DC power supply, oscillograph and Hall switch sensor to be measured, the copped wave that can produce cyclically-varying magnetic field is prolonged
Slow measurement module；
Hall switch sensor include at least 3 pins, be respectively power supply VCC, GND and output VOUT；Wherein VCC
It is connected to the positive output end of DC power supply；GND is connected to the ground terminal of DC power supply and the ground terminal of oscillograph；VOUT is connected to
The positive input terminal of oscillograph；The device in cyclically-varying magnetic field is generated in this case, it is a magnet ring, includes at least a pair of of magnetic pole,
And S extremely close to when, maximum magnetic field strength that Hall sensor senses is greater than BOP；N extremely close to when, Hall sensor senses
Minimum-B configuration intensity be less than BRP；The magnet ring at the uniform velocity rotation clockwise or counterclockwise；
The copped wave delay measurements module is triggering mode, output signal after being opened with oscillograph oscillograph is arranged
The rising edge of the square wave of VOUT opens simultaneously the twilight sunset display function of oscillograph as triggering edge, and twilight sunset shows that the time is set as nothing
Poor big or setting time, setting time are more than or equal to 3 seconds, and the appropriate screen that adjusts shows time scale, the waveform at this moment seen
As shown in Figure 6.Wherein BX is environmental magnetic field intensity, dull in this experiment to increase；BOP is magnetic operating point threshold value, is steady state value；
BX initial time is less than BOP, and the final moment can be greater than BOP；The sensor output waveform shown on oscillograph is VOUT.VOUT wave
R is the rising edge for triggering in shape, and failing edge will occur in VOUT after a period of time, according to chronological order, these
Possible failing edge appearance position is respectively A, B, C, D ... E, F；Due to opening twilight sunset display function, these failing edges are complete
It is shown in oscillograph screen, forms a band-like twilight sunset；If the rotation period of magnet ring and copped wave sampling period are precisely whole
Several times relationship sets then failing edge will appear in fixed bit, therefore need to adjust the revolving speed of magnet ring, so that the twilight sunset of failing edge is wide
Degree reaches maximum；The twilight sunset width (time difference of earliest failing edge and failing edge the latest) for measuring A to F at this time, as cuts
Wave postpones TCD；
Alternatively, the copped wave delay measurements module is triggering mode oscillograph is arranged, exported after being opened with oscillograph
The failing edge of the square wave of signal VOUT opens simultaneously the twilight sunset display function of oscillograph as triggering edge, and twilight sunset shows that the time sets
For infinitely great or setting time, setting time is more than or equal to 3 seconds, and the appropriate screen that adjusts shows time scale, at this moment sees
Waveform is as shown in Figure 7.Wherein BX is environmental magnetic field intensity, dull in this experiment to reduce；BRP is magnetic point of release threshold value, for perseverance
Definite value；BX initial time is greater than BRP, and the final moment can be less than BOP；The sensor output waveform shown on oscillograph is VOUT.
R is the failing edge for triggering in VOUT waveform, and rising edge will occur in VOUT after a period of time, suitable according to time order and function
Sequence, these possible rising edge appearance positions are respectively A, B, C, D ... E, F.
Due to opening twilight sunset display function, these rising edges are all shown in oscillograph screen, and formation one is band-like
Twilight sunset；If the rotation period of magnet ring and copped wave sampling period are precisely integral multiple relation, then rising edge will appear in fixation
Position, therefore the revolving speed of magnet ring need to be adjusted, so that the twilight sunset width of rising edge reaches maximum；The persistence of A to F is measured at this time
Width (time difference of earliest rising edge and rising edge the latest), as copped wave postpone TCD.
As a preferred solution of the present invention, the Hall sensor is located at outside magnet ring, can also be located within magnet ring.
The beneficial effects of the present invention are: Hall switch sensor copped wave delay measuring method proposed by the present invention and it is
System is observed the output signal of Hall switch sensor by oscillograph, uses output signal in periodically variable magnetic field
Rising edge (or failing edge) triggers latter one failing edge (or rising edge), the method for observing twilight sunset, measures this Hall biography indirectly
The copped wave of sensor postpones.This measurement method hardware device is at low cost, and measuring process is simple.
Copped wave delay is to measure one of the important technology index of Hall switch sensor, with sensor internal sample frequency
It is related, it is not easy directly to measure.The method proposed through the invention can realize the indirect measurement of copped wave delay, to understand this Hall
The copped wave characteristic of sensor, so that sensor design personnel or sensor buying side more fully grasp properties of product.
Detailed description of the invention
Fig. 1 is the input-output characteristic of ideal Hall switch sensor.
Fig. 2 is that the copped wave of Hall switch sensor postpones schematic diagram.
Fig. 3 is Hall switch sensor in the application by the effect of copped wave delayed impact.
Fig. 4 is measuring system schematic diagram.
The waveform of oscilloscope display when Fig. 5 is not set triggering and twilight sunset.
Fig. 6 is the method (rising edge triggering) with oscillograph afterglow measurement Hall switch sensor.
Fig. 7 is the method (failing edge triggering) with oscillograph afterglow measurement Hall switch sensor.
Specific embodiment
The preferred embodiment that the invention will now be described in detail with reference to the accompanying drawings.
Embodiment one
Referring to Fig. 1, passing through present invention discloses a kind of Hall switch sensor copped wave delay measuring method and system
Hall switch sensor is placed in cyclically-varying magnetic field, it, can with the twilight sunset of oscillograph observation sensor output signal
Its copped wave delay is obtained with indirect measurement.Twilight sunset show be oscillograph the general display function of one kind, can will a period of time
Interior waveform luminous point is maintained on oscilloscope display screen.
Test macro as shown in figure 4, include one can produce cyclically-varying magnetic field device 100, DC power supply 200,
Oscillograph 300 and Hall switch sensor to be measured 400.Hall switch sensor includes at least 3 pins, is electricity respectively
Source VCC, GND and output VOUT.Wherein VCC is connected to the positive output end of DC power supply；GND is connected to the ground connection of DC power supply
The ground terminal at end and oscillograph；VOUT is connected to the positive input terminal of oscillograph.The device in cyclically-varying magnetic field is generated in this example
In be a magnet ring, may include a pair of of magnetic pole or multipair magnetic pole (being 2 pairs of magnetic poles in Fig. 4), and S extremely close to when, Hall sensor
The maximum magnetic field strength sensed is greater than BOP；N extremely close to when, minimum-B configuration intensity that Hall sensor senses is less than BRP.
The magnet ring can at the uniform velocity rotation clockwise or counterclockwise.Hall sensor is located at outside magnet ring, can also be located within magnet ring.
In the first embodiment, specific testing procedure and principle are as described below:
Step 1: it powers to magnet ring, it is made to start to rotate；To DC power supply, suitable supply voltage (3V~30V) is set,
It powers to Hall sensor；
Step 2: opening oscillograph, observes the waveform of output signal VOUT.The influence of copped wave delay, observation are received at this time
To VOUT waveform answer as shown in figure 5, be a random period square wave；
Step 3: setting oscillograph is triggering mode, uses the rising edge of square wave in Fig. 5 as triggering edge, opens simultaneously and show
The twilight sunset display function of wave device, twilight sunset shows that the time is set as infinitely great (or longer time, such as larger than 3 seconds), appropriate to adjust
It saves screen and shows that time scale, the waveform at this moment seen are as shown in Figure 6.Wherein BX is environmental magnetic field intensity, single in this experiment
It adjusts big；BOP is magnetic operating point threshold value, is steady state value；BX initial time is less than BOP, and the final moment can be greater than BOP；Oscillograph
The sensor output waveform of upper display is VOUT.R is the rising edge for triggering in VOUT waveform, after a period of time VOUT
Failing edge to occur, according to chronological order, these possible failing edge appearance positions are respectively A, B, C, D ... E, F；By
In opening twilight sunset display function, these failing edges are all shown in oscillograph screen, form a band-like twilight sunset.It needs to infuse
Meaning, if the rotation period of magnet ring and copped wave sampling period are precisely integral multiple relation, then failing edge will appear in fixed bit
It sets, therefore the revolving speed of magnet ring need to be adjusted, so that the twilight sunset width of failing edge reaches maximum.The twilight sunset (time) of A to F is measured at this time
Width, as copped wave postpone (TCD).
The principle of this test method is as follows: (it should be emphasised again that the level of VOUT can only be when the copped wave of sensor samples
Quarter is updated) when environmental magnetic field is just beyond BOP (i.e. tA moment), if just encountering copped wave sampling instant, (assuming that VOUT is opened
Beginning to be high level) so VOUT just becomes low level, and here it is the failing edges at A in Fig. 6, and one be likely to occur earliest
Failing edge；If copped wave sampling does not occur in tA, and just occurs until tB, then failing edge just appears at B, with such
It pushes away.Under worst condition, before copped wave sampling instant just appears in the tA moment, then having to wait for next copped wave sampling, i.e.,
TF moment, VOUT can just become low level, and here it is failing edges at the F in Fig. 6, and the failing edge position being likely to occur the latest
It sets.So the time span of A to F is exactly copped wave delay of concern.
Embodiment two
The difference between this embodiment and the first embodiment lies in the present embodiment, step 1 and step 2 and the first embodiment
Identical, step 3 is changed to be triggered with failing edge, observes the twilight sunset of next rising edge, it may be assumed that
Step 3: setting oscillograph is triggering mode, uses the failing edge of square wave in Fig. 5 as triggering edge, opens simultaneously and show
The twilight sunset display function of wave device, twilight sunset shows that the time is set as infinitely great (or longer time, such as larger than 3 seconds), appropriate to adjust
It saves screen and shows that time scale, the waveform at this moment seen are as shown in Figure 7.Wherein BX is environmental magnetic field intensity, single in this experiment
It adjusts and reduce small；BRP is magnetic point of release threshold value, is steady state value；BX initial time is greater than BRP, and the final moment can be less than BOP；Oscillograph
The sensor output waveform of upper display is VOUT.R is the failing edge for triggering in VOUT waveform, after a period of time VOUT
Rising edge to occur, according to chronological order, these possible rising edge appearance positions are respectively A, B, C, D ... E, F；By
In opening twilight sunset display function, these rising edges are all shown in oscillograph screen, form a band-like twilight sunset.It needs to infuse
Meaning, if the rotation period of magnet ring and copped wave sampling period are precisely integral multiple relation, then rising edge will appear in fixed bit
It sets, therefore the revolving speed of magnet ring need to be adjusted, so that the twilight sunset width of rising edge reaches maximum.The twilight sunset (time) of A to F is measured at this time
Width, as copped wave postpone (TCD).
In conclusion Hall switch sensor copped wave delay measuring method proposed by the present invention and system, in periodicity
In changing magnetic field, the output signal of Hall switch sensor is observed by oscillograph, using output signal rising edge (under or
Edge drops) latter one failing edge (or rising edge) is triggered, the method for observing twilight sunset, the copped wave for measuring this Hall sensor indirectly is prolonged
Late.This measurement method hardware device is at low cost, and measuring process is simple.
Copped wave delay is to measure one of the important technology index of Hall switch sensor, with sensor internal sample frequency
It is related, it is not easy directly to measure.The method proposed through the invention can realize the indirect measurement of copped wave delay, to understand this Hall
The copped wave characteristic of sensor, so that sensor design personnel or sensor buying side more fully grasp properties of product.
Description and application of the invention herein are illustrative, is not wishing to limit the scope of the invention to above-described embodiment
In.The deformation and change of embodiments disclosed herein are possible, the realities for those skilled in the art
The replacement and equivalent various parts for applying example are well known.It should be appreciated by the person skilled in the art that not departing from the present invention
Spirit or essential characteristics in the case where, the present invention can in other forms, structure, arrangement, ratio, and with other components,
Material and component are realized.Without departing from the scope and spirit of the present invention, can to embodiments disclosed herein into
The other deformations of row and change.
Claims (4)
1. a kind of Hall switch sensor copped wave delay measuring method, which is characterized in that the measurement method includes:
Step S1, it powers to magnet ring, it is made to start to rotate；To DC power supply, suitable supply voltage, supply voltage 3V are set
~30V powers to Hall sensor；
Step S2, oscillograph is opened, the waveform of output signal VOUT is observed；It is influenced, is observed by copped wave delay at this time
VOUT waveform is the square wave of a random period；
Step S3, setting oscillograph is triggering mode, uses the rising edge of the square wave in step S2 as triggering edge, opens simultaneously and show
The twilight sunset display function of wave device, twilight sunset show that the time is set as infinitely great or setting time, and setting time is to fit more than or equal to 3 seconds
Time scale is shown when adjusting screen, and environmental magnetic field intensity BX is dull in this experiment to be increased；Magnetic operating point threshold value BOP is constant
Value；BX initial time is less than BOP, and the final moment can be greater than BOP；The sensor output waveform shown on oscillograph is VOUT；
R is the rising edge for triggering in VOUT waveform, and failing edge will occur in VOUT after a period of time, suitable according to time order and function
Sequence, these failing edge appearance positions are respectively A, B, C, D ... E, F；Due to opening twilight sunset display function, these failing edges are complete
It is shown in oscillograph screen, forms a band-like twilight sunset；If the rotation period of magnet ring and copped wave sampling period are precisely whole
Several times relationship sets then failing edge will appear in fixed bit, therefore need to adjust the revolving speed of magnet ring, so that the twilight sunset of failing edge is wide
Degree reaches maximum；The twilight sunset width of A to F, the time difference of i.e. earliest failing edge and failing edge the latest are measured at this time, are as cut
Wave postpones TCD；
Alternatively, setting oscillograph is triggering mode, uses the failing edge of square wave in step S2 as triggering edge, open simultaneously oscillograph
Twilight sunset display function, twilight sunset shows that the time is set as infinitely great or setting time, setting time be more than or equal to 3 seconds, it is appropriate to adjust
It saves screen and shows time scale, environmental magnetic field intensity BX is dull in this experiment to be reduced；Magnetic point of release threshold value BRP is steady state value；
BX initial time is greater than BRP, and the final moment can be less than BRP；The sensor output waveform shown on oscillograph is VOUT；VOUT wave
R is the failing edge for triggering in shape, and rising edge will occur in VOUT after a period of time, according to chronological order, these
Rising edge appearance position is respectively A, B, C, D ... E, F；Due to opening twilight sunset display function, these rising edges are all shown
In oscillograph screen, a band-like twilight sunset is formed；If the rotation period of magnet ring and copped wave sampling period are precisely that integral multiple closes
System, sets, therefore need to adjust the revolving speed of magnet ring then rising edge will appear in fixed bit, so that the twilight sunset width of rising edge reaches
It is maximum；The twilight sunset width of A to F, the time difference of i.e. earliest rising edge and rising edge the latest are measured at this time, and as copped wave postpones
TCD。
2. Hall switch sensor copped wave delay measuring method according to claim 1, it is characterised in that:
The level of VOUT can only be updated in the copped wave sampling instant of sensor, when environmental magnetic field intensity is just beyond BOP,
The tA moment, if just encountering copped wave sampling instant, it is assumed that VOUT starts as high level, then VOUT just becomes low level, for most
A failing edge being early likely to occur；If copped wave sampling instant does not occur in tA, and just occur until tB, then failing edge
Just appear at B, and so on；Under worst condition, before copped wave sampling instant just appears in the tA moment, then must wait
To next copped wave sampling instant, i.e. tF moment, VOUT can just become low level, for the failing edge position being likely to occur the latest；
So the time span of A to F is exactly the time difference of copped wave of concern delay, i.e., earliest failing edge and failing edge the latest.
3. a kind of Hall switch sensor copped wave delay measurements system, which is characterized in that the measuring system include: one can
Generate device (100), DC power supply (200), oscillograph (300) and the Hall switch to be measured sensing in cyclically-varying magnetic field
Device (400), copped wave delay measurements module；
Hall switch sensor include at least 3 pins, be respectively power supply VCC, GND and output VOUT；Wherein VCC connection
To the positive output end of DC power supply；GND is connected to the ground terminal of DC power supply and the ground terminal of oscillograph；VOUT is connected to oscillography
The positive input terminal of device；The device for generating cyclically-varying magnetic field is a magnet ring, comprising at least a pair of of magnetic pole, and S extremely close to when,
The maximum magnetic field strength that Hall sensor senses is greater than BOP；N extremely close to when, the minimum-B configuration that Hall sensor senses is strong
Degree is less than BRP；The magnet ring at the uniform velocity rotation clockwise or counterclockwise；
The copped wave delay measurements module is triggering mode, output signal after being opened with oscillograph (300) oscillograph is arranged
The rising edge of the square wave of VOUT opens simultaneously the twilight sunset display function of oscillograph as triggering edge, and twilight sunset shows that the time is set as nothing
Poor big or setting time, setting time are more than or equal to 3 seconds, and the appropriate screen that adjusts shows time scale, environmental magnetic field intensity BX
It is dull in this experiment to increase；Magnetic operating point threshold value BOP is steady state value；BX initial time is less than BOP, and the final moment can be greater than
BOP；The sensor output waveform shown on oscillograph is VOUT；R is the rising edge for triggering in VOUT waveform, by one section
Failing edge will occur in VOUT after time, according to chronological order, these failing edge appearance positions be respectively A, B, C, D ... E,
F；Due to opening twilight sunset display function, these failing edges are all shown in oscillograph screen, form a band-like twilight sunset；If
The rotation period of magnet ring and copped wave sampling period are precisely integral multiple relation, are set then failing edge will appear in fixed bit, because
This need to adjust the revolving speed of magnet ring, so that the twilight sunset width of failing edge reaches maximum；The twilight sunset width, i.e. earliest of A to F is measured at this time
Failing edge and failing edge the latest time difference, as copped wave postpones TCD；
Alternatively, the copped wave delay measurements module is triggering mode oscillograph is arranged, exported after being opened with oscillograph (300)
The failing edge of the square wave of signal VOUT opens simultaneously the twilight sunset display function of oscillograph as triggering edge, and twilight sunset shows that the time sets
For infinitely great or setting time, setting time is more than or equal to 3 seconds, and the appropriate screen that adjusts shows time scale, wherein environment magnetic
Field intensity BX is dull in this experiment to be reduced；Magnetic point of release threshold value BRP is steady state value；BX initial time is greater than BRP, final moment
BRP can be less than；The sensor output waveform shown on oscillograph is VOUT；R is the failing edge for triggering in VOUT waveform, warp
Rising edge will occur in VOUT after a period of time, according to chronological order, these rising edge appearance positions be respectively A, B, C,
D……E,F；
Due to opening twilight sunset display function, these rising edges are all shown in oscillograph screen, form a band-like twilight sunset；
If the rotation period of magnet ring and copped wave sampling period are precisely integral multiple relation, set then rising edge will appear in fixed bit,
Therefore the revolving speed of magnet ring need to be adjusted, so that the twilight sunset width of rising edge reaches maximum；The twilight sunset width, i.e. most of A to F is measured at this time
The time difference of early rising edge and rising edge the latest, as copped wave postpone TCD.
4. Hall switch sensor copped wave delay measurements system according to claim 3, it is characterised in that:
The Hall sensor is located at outside magnet ring, or is located within magnet ring.
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| CN106646316B (en) * | 2017-01-24 | 2019-06-14 | 上海麦歌恩微电子股份有限公司 | The test method of Hall switch sensor noise |
| CN108872687B (en) * | 2018-04-27 | 2021-02-09 | 中颖电子股份有限公司 | Chopped wave detection method |
| CN109612502B (en) * | 2018-12-05 | 2021-02-12 | 麦歌恩电子(上海)有限公司 | Method and system for testing transmission delay of internal signal of magnetic encoder chip |
| CN111007314B (en) * | 2019-11-18 | 2023-05-09 | 晶晨半导体（深圳）有限公司 | Method for measuring stability of SOC signal through oscilloscope afterglow mode |
| CN116080745A (en) * | 2023-01-05 | 2023-05-09 | 北京汽车集团越野车有限公司 | Control method capable of improving position accuracy of electric adjustment steering column and automobile |
| CN116736104B (en) * | 2023-08-14 | 2023-12-08 | 天津普智芯网络测控技术有限公司 | Method and system for automatically testing action delay time of Hall switch device |
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