CN106767992A - 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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Abstract
Present invention is disclosed a kind of Hall switch sensor copped wave delay measuring method, including：For magnet ring is powered, it is set to start rotation；Dc source is powered for Hall sensor；Open oscillograph, the waveform of observation output signal VOUT；VOUT waveforms are a square wave for random period；Setting oscillograph is triggering pattern, with the rising edge of above-mentioned square wave as triggering edge, while opening the twilight sunset display function of oscillograph；Due to opening twilight sunset display function, these trailing edges are all shown within oscillograph screen, form a banding twilight sunset；If the rotation period of magnet ring and copped wave sampling period are precisely integral multiple relation, then trailing edge will appear in fixed position, therefore need to adjust the rotating speed of magnet ring so that the twilight sunset width of trailing edge reaches maximum；The now trailing edge twilight sunset width of measurement sensor output waveform, i.e., the time difference of earliest trailing edge and trailing edge the latest, as copped wave postpones 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 to pass
Sensor copped wave delay measuring method；Meanwhile, the invention further relates to a kind of Hall switch sensor copped wave delay measurements system.
Background technology
Hall sensor is a kind of Magnetic Sensor made according to Hall effect.Hall sensor is divided into Hall switch biography
Sensor and the major class of linear hall sensor two.Wherein Hall switch sensor can realize the work(such as distance detection, velocity measuring
Can, Industry Control is widely used in, the field such as detection technique and information processing is particularly applied in DC brushless motor etc.
In, Hall switch sensor is its core parts, and the market demand is very huge.
The working characteristics of Hall switch sensor is as shown in Figure 1.Abscissa represents sensor proximity magnetic field intensity B, indulges
Coordinate representation sensor output voltage VOUT.Work as B>During BOP, VOUT is low level (BOP is referred to as magnetic operating point threshold value)；Work as B<
During BRP, VOUT is high level (BRP is referred to as magnetic point of release threshold value)；Work as BRP<B<During BOP, VOUT depends on the value of previous state,
Both possible height was likely to low.
It is one of key technical index of Hall switch sensor that copped wave postpones." copped wave " technology (chopping) is one
The circuit design technique being widely used in Hall sensor is planted, i.e., zero input drift of analog circuit is eliminated by multiple repairing weld
Move.Because the sampling period of wave chopping technology is limited (can not be infinitely small), therefore the change of sensor output VOUT can only be every
Secondary sampling instant is updated, and cannot be pin-pointed to any time between double sampling.If for example as shown in Fig. 2
The adjacent double sampling moment of copped wave is respectively t1 and t2, and in tx moment environmental magnetic fields B=BOP.If without copped wave (preferable feelings
Condition), then VOUT will at once become low level at the tx moment, but because VOUT can only be updated in sampling instant, therefore must wait until
The t2 moment could become low level.Any time between t1 to t2 is appeared randomly in due to tx, this allows for actual upset moment t2
There is a random delay and preferable upset moment tx between.When tx is close to t1, this random delay has maximum, here it is
Copped wave postpones (TCD).
When applying in the environment such as motor, due to the presence that copped wave postpones, even if motor at the uniform velocity rotates, sensor output
Also can there is random delay in the upset moment of VOUT, the cycle is not fixed, as shown in Figure 3.Rotor has some to magnetic pole, N
Magnetic field BN near extremely<The extremely neighbouring magnetic field BS of BRP, S>BOP.Now ideal is output as the square-wave signal of fixed cycle, and actual defeated
The cycle for going out VOUT is influenceed by copped wave delay and is become random.When going controlled motor to rotate with this VOUT signal, VOUT with
Machine upset can substantially reduce the control efficiency of motor, the overall performance of limiting motor work.
Existing Hall switch sensor method of testing is relatively simple：Sensor is placed in the magnetic field environment of static state,
Slow to change magnetic field intensity, magnetic field intensities of record VOUT when high level is changed into low level is BOP；Record VOUT is by low level
Magnetic field intensity when being changed into high level is BRP.Copped wave postpones the sampled signal due to being related to sensor internal circuit, is difficult straight
Test is connect to obtain, therefore there is presently no the Validity Test method postponed for copped wave.
The content of the invention
The technical problems to be solved by the 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.
Additionally, the present invention also provides a kind of Hall switch sensor copped wave delay measurements system, it is possible to decrease hardware device
Cost, measuring process is simple.
In order to solve the above technical problems, the present invention is adopted the following technical scheme that：
A kind of Hall switch sensor copped wave delay measuring method, the measuring method includes：
Step S1, powered to magnet ring, it is started rotation；To dc source, suitable supply voltage, supply voltage are set
It is 3V~30V, is powered to Hall sensor；
Step S2, unlatching oscillograph, the waveform of observation output signal VOUT；Now receive the influence of copped wave delay, observation
To VOUT waveforms be a square wave for random period；
Step S3, setting oscillograph are triggering pattern, with the rising edge of square wave in step S2 as triggering edge, while opening
The twilight sunset display function of oscillograph, the twilight sunset display time is set to infinitely great or setting time, setting time be more than or equal to 3 seconds,
Appropriate regulation screen display time scale, wherein BX is environmental magnetic field intensity, dull increase in testing herein；BOP works for magnetic
Point threshold value, is steady state value；BX initial times are less than BOP, and the final moment can be more than BOP；The sensor output shown on oscillograph
Waveform is VOUT.R is the rising edge for triggering in VOUT waveforms, and trailing edge is will appear from through VOUT after a period of time, according to
Sequentially, there is position respectively A, B, C, D ... E, F to time order and function in these possible trailing edges；Shown due to opening twilight sunset
Function, these trailing edges are all shown within oscillograph screen, form a banding twilight sunset；If the rotation period of magnet ring and copped wave
Sampling period is precisely integral multiple relation, then trailing edge will appear in fixed position, therefore need to adjust the rotating speed of magnet ring, is made
The twilight sunset width for obtaining trailing edge reaches maximum；Now measure twilight sunset width (earliest trailing edge and the trailing edge the latest of A to F
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 running into copped wave sampling instant, it is assumed that VOUT starts to be high level, then VOUT is just changed into low level, is most
A trailing edge being early likely to occur；If copped wave sampling does not occur in tA, and just occurs until tB, then trailing edge will
At B, by that analogy；Under worst condition, before copped wave sampling instant just appears in the tA moment, then have to wait for down
One copped wave sampling, i.e. at the tF moment, VOUT can just be changed into low level, be the trailing edge position being likely to occur the latest；So A to F
Time span be copped wave delay.
Or, setting oscillograph is triggering pattern, with the trailing edge of square wave in step S2 as triggering edge, while opening is shown
The twilight sunset display function of ripple device, the twilight sunset display time is set to infinitely great or setting time, and setting time is, more than or equal to 3 seconds, to fit
When regulation screen display time scale；Wherein BX is environmental magnetic field intensity, dull in testing herein to reduce；BRP is magnetic point of release
Threshold value, is steady state value；BX initial times are more than BRP, and the final moment can be less than BOP；The sensor output wave shown on oscillograph
Shape is VOUT.In VOUT waveforms R be for trigger trailing edge, will appear from rising edge through VOUT after a period of time, according to when
Between sequencing, there is position respectively A, B, C, D ... E, F in these possible rising edges；Due to opening twilight sunset display work(
Can, these rising edges are all shown within oscillograph screen, form a banding twilight sunset；If the rotation period of magnet ring and copped wave are adopted
The sample cycle is precisely integral multiple relation, then rising edge will appear in fixed position, therefore need to adjust the rotating speed of magnet ring so that
The twilight sunset width of rising edge reaches maximum；Now persistence width (earliest rising edge and the rising the latest of measurement A to F
The time difference on edge), as copped wave postpones TCD.
A kind of Hall switch sensor copped wave delay measuring method, the measuring method includes：
Step S1, powered to magnet ring, it is started rotation；Suitable supply voltage is set to dc source, is passed to Hall
Sensor is powered；
Step S2, unlatching oscillograph, the waveform of observation output signal VOUT；Now receive the influence of copped wave delay, observation
To VOUT waveforms be a square wave for random period；
Step S3, setting oscillograph are triggering pattern, with the rising edge of the square wave in step S2 as triggering edge, while beating
The twilight sunset display function of oscillograph is opened, the twilight sunset display time is set to infinitely great or setting time, and setting time is more than or equal to 3
Second, appropriate regulation screen display time scale, wherein BX is environmental magnetic field intensity, dull increase in testing herein；BOP is magnetic work
Make point threshold value, be steady state value；BX initial times are less than BOP, and the final moment can be more than BOP；The sensor shown on oscillograph is defeated
Go out waveform for VOUT.R is the rising edge for triggering in VOUT waveforms, and trailing edge is will appear from through VOUT after a period of time, is pressed
According to time order and function order, there is position respectively A, B, C, D ... E, F in these possible trailing edges；Show due to opening twilight sunset
Show function, these trailing edges are all shown within oscillograph screen, form a banding twilight sunset；If it is noted that magnet ring turn
Dynamic cycle and copped wave sampling period are precisely integral multiple relation, then trailing edge will appear in fixed position, therefore need regulation
The rotating speed of magnet ring so that the twilight sunset width of trailing edge reaches maximum；Now measurement A to F twilight sunset width (earliest trailing edge and
The time difference of trailing edge the latest), as copped wave postpones TCD；
Or, setting oscillograph is triggering pattern, with the trailing edge of square wave in step S2 as triggering edge, while opening is shown
The twilight sunset display function of ripple device, the twilight sunset display time is set to infinitely great or setting time, and setting time is, more than or equal to 3 seconds, to fit
When regulation screen display time scale, wherein BX is environmental magnetic field intensity, dull in testing herein to reduce；BRP is magnetic point of release
Threshold value, is steady state value；BX initial times are more than BRP, and the final moment can be less than BOP；The sensor output wave shown on oscillograph
Shape is VOUT.In VOUT waveforms R be for trigger trailing edge, will appear from rising edge through VOUT after a period of time, according to when
Between sequencing, there is position respectively A, B, C, D ... E, F in these possible rising edges；Due to opening twilight sunset display work(
Can, these rising edges are all shown within oscillograph screen, form a banding twilight sunset；If the rotation period of magnet ring and copped wave are adopted
The sample cycle is precisely integral multiple relation, then rising edge will appear in fixed position, therefore need to adjust the rotating speed of magnet ring so that
The twilight sunset width of rising edge reaches maximum；Now measure twilight sunset width (earliest rising edge and the rising edge the latest of A to F
Time difference), as copped wave postpones TCD.
Used as a preferred embodiment of the present invention, in step S1, supply voltage is 3V~30V.
A kind of Hall switch sensor copped wave delay measurements system, it is characterised in that the measuring system includes：Including
One device that can produce cyclically-varying magnetic field, dc source, oscillograph and Hall switch sensor to be measured, copped wave are prolonged
Slow measurement module；
Hall switch sensor comprise 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 source；GND is connected to the earth terminal of dc source and the earth terminal of oscillograph；VOUT is connected to
The positive input terminal of oscillograph；The device for producing cyclically-varying magnetic field is in this example a magnet ring, comprising at least one pair of magnetic pole,
And S extremely near when, the maximum magnetic field strength that Hall sensor is sensed be more than BOP；When N is extremely close to, Hall sensor is sensed
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 used to set oscillograph for triggering pattern, output signal after being opened with oscillograph
The rising edge of the square wave of VOUT is used as triggering edge, while opening the twilight sunset display function of oscillograph, the twilight sunset display time is set to nothing
Poor big or setting time, setting time is appropriate regulation screen display time scale, the waveform at this moment seen more than or equal to 3 seconds
As shown in Figure 6.Wherein BX is environmental magnetic field intensity, dull increase in testing herein；BOP is magnetic operating point threshold value, is steady state value；
BX initial times are less than BOP, and the final moment can be more than BOP；The sensor output waveform shown on oscillograph is VOUT.VOUT ripples
R is the rising edge for triggering in shape, and trailing edge is will appear from through VOUT after a period of time, according to time order and function order, these
There is position respectively A, B, C, D ... E, F in possible trailing edge；Due to opening twilight sunset display function, these trailing edges are complete
It is shown in oscillograph screen, forms a banding twilight sunset；If the rotation period of magnet ring and copped wave sampling period are precisely whole
Several times relation, then trailing edge will appear in fixed position, therefore need to adjust the rotating speed of magnet ring so that the twilight sunset of trailing edge is wide
Degree reaches maximum；Now the twilight sunset width (time difference of earliest trailing edge and trailing edge the latest) of measurement A to F, as cuts
Ripple postpones TCD；
Or, the copped wave delay measurements module is used to set oscillograph for triggering pattern, is exported after being opened with oscillograph
The trailing edge of the square wave of signal VOUT is used as triggering edge, while opening the twilight sunset display function of oscillograph, the twilight sunset display time sets
It is infinitely great or setting time, setting time is the appropriate regulation screen display time scale more than or equal to 3 seconds, is at this moment seen
Waveform is as shown in Figure 7.Wherein BX is environmental magnetic field intensity, dull in testing herein to reduce；BRP is magnetic point of release threshold value, is permanent
Definite value；BX initial times are more than BRP, and the final moment can be less than BOP；The sensor output waveform shown on oscillograph is VOUT.
R is the trailing edge for triggering in VOUT waveforms, and rising edge is will appear from through VOUT after a period of time, suitable according to time order and function
There is position respectively A, B, C, D ... E, F in sequence, these possible rising edges.
Due to opening twilight sunset display function, these rising edges are all shown within oscillograph screen, form a banding
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 rotating speed of magnet ring need to be adjusted so that the twilight sunset width of rising edge reaches maximum；Now measure the persistence of A to F
The width time difference of rising edge the latest (earliest rising edge with), as copped wave postpones TCD.
Used as a preferred embodiment of the present invention, the Hall sensor is located at outside magnet ring, it is also possible 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, in periodically variable magnetic field, the output signal of Hall switch sensor is observed by oscillograph, uses output signal
Rising edge (or trailing edge) triggers latter one trailing edge (or rising edge), the method for observing twilight sunset, and this Hall biography is measured indirectly
The copped wave of sensor postpones.This measuring method hardware device low cost, measuring process is simple.
Copped wave postpones to be one of important technology index of measurement Hall switch sensor, with sensor internal sample frequency
It is relevant, it is difficult direct measurement.The indirect measurement that copped wave postpones can be realized by method proposed by the present invention, so as 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.
Brief description of the drawings
Fig. 1 is the input-output characteristic of preferable Hall switch sensor.
Fig. 2 postpones schematic diagram for the copped wave of Hall switch sensor.
Fig. 3 is Hall switch sensor in the application by the effect of copped wave delayed impact.
Fig. 4 is measuring system schematic diagram.
Fig. 5 is the waveform of oscilloscope display when being not provided with triggering and twilight sunset.
Fig. 6 is with the method (rising edge triggering) of oscillograph afterglow measurement Hall switch sensor.
Fig. 7 is with the method (trailing edge triggering) of 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
Fig. 1 is referred to, present invention is disclosed a kind of Hall switch sensor copped wave delay measuring method and system, is passed through
Hall switch sensor is positioned in cyclically-varying magnetic field, the twilight sunset of sensor output signal is observed with oscillograph, can
Its copped wave is obtained with indirect measurement to postpone.Twilight sunset show be oscillograph a kind of general display function, can by a period of time
Interior waveform luminous point is maintained on oscilloscope display screen.
Test system as shown in figure 4, including a device 100 that can produce cyclically-varying magnetic field, dc source 200,
Oscillograph 300 and Hall switch sensor 400 to be measured.Hall switch sensor comprises at least 3 pins, is respectively electricity
Source VCC, GND and output VOUT.Wherein VCC is connected to the positive output end of dc source；GND is connected to the ground connection of dc source
End and the earth terminal of oscillograph；VOUT is connected to the positive input terminal of oscillograph.The device in cyclically-varying magnetic field is produced in this example
In be a magnet ring, can comprising a pair of magnetic poles or multipair magnetic pole (being 2 pairs of magnetic poles in Fig. 4), and S extremely near when, Hall sensor
The maximum magnetic field strength for sensing is more than BOP；When N is extremely close to, the minimum-B configuration intensity that Hall sensor is sensed is less than BRP.
The magnet ring can at the uniform velocity rotation clockwise or counterclockwise.Hall sensor is located at outside magnet ring, it is also possible within magnet ring.
In the first embodiment, specific testing procedure and principle are as described below：
Step one：Powered to magnet ring, it is started rotation；To dc source, suitable supply voltage (3V~30V) is set,
Powered to Hall sensor；
Step 2：Open oscillograph, the waveform of observation output signal VOUT.Now receive the influence of copped wave delay, observation
The VOUT waveforms for arriving should be as shown in figure 5, be a square wave for random period；
Step 3：Setting oscillograph is triggering pattern, with the rising edge of square wave in Fig. 5 as triggering edge, while opening is shown
The twilight sunset display function of ripple device, the twilight sunset display time is set to infinitely great (or time more long, such as larger than 3 seconds), appropriate to adjust
Section screen display time scale, the waveform at this moment seen is as shown in Figure 6.Wherein BX is environmental magnetic field intensity, single in testing herein
Adjust increase；BOP is magnetic operating point threshold value, is steady state value；BX initial times are less than BOP, and the final moment can be more than BOP；Oscillograph
The sensor output waveform of upper display is VOUT.R is the rising edge for triggering in VOUT waveforms, through VOUT after a period of time
Trailing edge is will appear from, according to time order and function order, position respectively A, B, C, D ... E, F occur in these possible trailing edges；By
In twilight sunset display function is opened, these trailing edges are all shown within oscillograph screen, form a banding twilight sunset.Need note
Meaning, if the rotation period of magnet ring and copped wave sampling period are precisely integral multiple relation, then trailing edge will appear in fixed bit
Put, therefore the rotating speed of magnet ring need to be adjusted so that the twilight sunset width of trailing edge reaches maximum.Now measure the twilight sunset (time) of A to F
Width, as copped wave postpone (TCD).
The principle of this method of testing is as follows：(it should be emphasised again that the level of VOUT can only be when the copped wave of sensor be sampled
Quarter is updated) when environmental magnetic field is just beyond BOP (i.e. tA moment), if just running into copped wave sampling instant, (assuming that VOUT is opened
It is high level to begin) so VOUT is just changed into low level, here it is the trailing edge in Fig. 6 at A, is also for being likely to occur earliest
Trailing edge；If copped wave sampling does not occur in tA, and just occurs until tB, then trailing edge is just appeared at B, with such
Push away.Under worst condition, before copped wave sampling instant just appears in the tA moment, then have to wait for next copped wave sampling, i.e.,
TF moment, VOUT can just be changed into low level, here it is trailing edge at F in Fig. 6, is also the trailing edge position being likely to occur the latest
Put.So the time span of A to F is exactly copped wave of concern postponing.
Embodiment two
The present embodiment is with the difference of embodiment one, in the present embodiment, step one and step 2 and the first embodiment
Identical, step 3 is changed to be triggered with trailing edge, observes the twilight sunset of next rising edge, i.e.,：
Step 3：Setting oscillograph is triggering pattern, with the trailing edge of square wave in Fig. 5 as triggering edge, while opening is shown
The twilight sunset display function of ripple device, the twilight sunset display time is set to infinitely great (or time more long, such as larger than 3 seconds), appropriate to adjust
Section screen display time scale, the waveform at this moment seen is as shown in Figure 7.Wherein BX is environmental magnetic field intensity, single in testing herein
Adjust and reduce small；BRP is magnetic point of release threshold value, is steady state value；BX initial times are more than BRP, and the final moment can be less than BOP；Oscillograph
The sensor output waveform of upper display is VOUT.R is the trailing edge for triggering in VOUT waveforms, through VOUT after a period of time
Rising edge is will appear from, according to time order and function order, position respectively A, B, C, D ... E, F occur in these possible rising edges；By
In twilight sunset display function is opened, these rising edges are all shown within oscillograph screen, form a banding twilight sunset.Need note
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
Put, therefore the rotating speed of magnet ring need to be adjusted so that the twilight sunset width of rising edge reaches maximum.Now measure the twilight sunset (time) of A to F
Width, as copped wave postpone (TCD).
In sum, Hall switch sensor copped wave delay measuring method proposed by the present invention and system, periodically
In the magnetic field of change, by oscillograph observe Hall switch sensor output signal, using output signal rising edge (or under
Drop edge) latter one trailing edge (or rising edge) is triggered, the method for observing twilight sunset, the copped wave that this Hall sensor is measured indirectly is prolonged
Late.This measuring method hardware device low cost, measuring process is simple.
Copped wave postpones to be one of important technology index of measurement Hall switch sensor, with sensor internal sample frequency
It is relevant, it is difficult direct measurement.The indirect measurement that copped wave postpones can be realized by method proposed by the present invention, so as 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.
Here description of the invention and application are illustrative, are not wishing to limit the scope of the invention to above-described embodiment
In.The deformation and change of embodiments disclosed herein are possible, real for those skilled in the art
The replacement and equivalent various parts for applying example are 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 of, the present invention can in other forms, structure, arrangement, ratio, and with other components,
Material and part are realized.In the case where scope and spirit of the present invention are not departed from, embodiments disclosed herein can be entered
Other deformations of row and change.
Claims (7)
1. a kind of Hall switch sensor copped wave delay measuring method, it is characterised in that the measuring method includes：
Step S1, powered to magnet ring, it is started rotation；Suitable supply voltage is set to dc source, supply voltage is 3V
~30V, powers to Hall sensor；
Step S2, unlatching oscillograph, the waveform of observation output signal VOUT；The influence of copped wave delay is now received, it was observed that
VOUT waveforms are a square wave for random period；
Step S3, setting oscillograph are triggering pattern, with the rising edge of square wave in step S2 as triggering edge, while opening oscillography
The twilight sunset display function of device, the twilight sunset display time is set to infinitely great or setting time, and setting time is more than or equal to 3 seconds, suitably
Regulation screen display time scale, environmental magnetic field intensity BX dull increases in testing herein；Magnetic operating point threshold value BOP is constant
Value；BX initial times are less than BOP, and the final moment can be more than BOP；The sensor output waveform shown on oscillograph is VOUT；
R is the rising edge for triggering in VOUT waveforms, and trailing edge is will appear from through VOUT after a period of time, suitable according to time order and function
There is position respectively A, B, C, D ... E, F in sequence, these possible trailing edges；Due to opening twilight sunset display function, under these
Drop forms a banding twilight sunset along being all shown within oscillograph screen；If the rotation period of magnet ring and copped wave sampling period are proper
It is well integral multiple relation, then trailing edge will appear in fixed position, therefore need to adjust the rotating speed of magnet ring so that trailing edge
Twilight sunset width reaches maximum；The time difference of the twilight sunset width, i.e., earliest trailing edge and trailing edge the latest of A to F is now measured,
As copped wave postpones TCD；
The level of VOUT can only be updated in the copped wave sampling instant of sensor, when when environmental magnetic field is just beyond BOP, tA
Carve, if just running into copped wave sampling instant, it is assumed that VOUT starts to be high level, then VOUT is just changed into low level, is earliest may be used
The trailing edge that can occur；If copped wave sampling does not occur in tA, and just occurs until tB, then trailing edge just occurs
At B, by that analogy；Under worst condition, before copped wave sampling instant just appears in the tA moment, then have to wait for next
Copped wave is sampled, i.e. at the tF moment, VOUT can just be changed into low level, be the trailing edge position being likely to occur the latest；So A to F when
Between span be copped wave delay；
Or, setting oscillograph is triggering pattern, with the trailing edge of square wave in step S2 as triggering edge, while opening oscillograph
Twilight sunset display function, the twilight sunset display time is set to infinitely great or setting time, setting time be more than or equal to 3 seconds, it is appropriate to adjust
Section screen display time scale, environmental magnetic field intensity BX is dull in testing herein to be reduced；Magnetic point of release threshold value BRP is steady state value；
BX initial times are more than BRP, and the final moment can be less than BOP；The sensor output waveform shown on oscillograph is VOUT；VOUT ripples
R is the trailing edge for triggering in shape, and rising edge is will appear from through VOUT after a period of time, according to time order and function order, these
There is position respectively A, B, C, D ... E, F in possible rising edge；Due to opening twilight sunset display function, these rising edges are complete
It is shown in oscillograph screen, forms a banding twilight sunset；If the rotation period of magnet ring and copped wave sampling period are precisely whole
Several times relation, then rising edge will appear in fixed position, therefore need to adjust the rotating speed of magnet ring so that the twilight sunset of rising edge is wide
Degree reaches maximum；The time difference of the persistence width, i.e., earliest rising edge and rising edge the latest of A to F is now measured, i.e.,
For copped wave postpones TCD.
2. a kind of Hall switch sensor copped wave delay measuring method, it is characterised in that the measuring method includes：
Step S1, powered to magnet ring, it is started rotation；Suitable supply voltage is set to dc source, to Hall sensor
Power supply；
Step S2, unlatching oscillograph, the waveform of observation output signal VOUT；The influence of copped wave delay is now received, it was observed that
VOUT waveforms are a square wave for random period；
Step S3, setting oscillograph are triggering pattern, with the rising edge of the square wave in step S2 as triggering edge, while opening is shown
The twilight sunset display function of ripple device, the twilight sunset display time is set to infinitely great or setting time, and setting time is, more than or equal to 3 seconds, to fit
When regulation screen display time scale, environmental magnetic field intensity BX dull increases in testing herein；Magnetic operating point threshold value BOP is constant
Value；BX initial times are less than BOP, and the final moment can be more than BOP；The sensor output waveform shown on oscillograph is VOUT；
R is the rising edge for triggering in VOUT waveforms, and trailing edge is will appear from through VOUT after a period of time, suitable according to time order and function
There is position respectively A, B, C, D ... E, F in sequence, these possible trailing edges；Due to opening twilight sunset display function, under these
Drop forms a banding twilight sunset along being all shown within oscillograph screen；If it is noted that the rotation period of magnet ring and copped wave are adopted
The sample cycle is precisely integral multiple relation, then trailing edge will appear in fixed position, therefore need to adjust the rotating speed of magnet ring so that
The twilight sunset width of trailing edge reaches maximum；Now measure twilight sunset width, i.e., earliest trailing edge and the trailing edge the latest of A to F
Time difference, as copped wave postpone TCD；
Or, setting oscillograph is triggering pattern, with the trailing edge of square wave in step S2 as triggering edge, while opening oscillograph
Twilight sunset display function, the twilight sunset display time is set to infinitely great or setting time, setting time be more than or equal to 3 seconds, it is appropriate to adjust
Section screen display time scale, environmental magnetic field intensity BX is dull in testing herein to be reduced；Magnetic point of release threshold value BRP is steady state value；
BX initial times are more than BRP, and the final moment can be less than BOP；The sensor output waveform shown on oscillograph is VOUT；VOUT ripples
R is the trailing edge for triggering in shape, and rising edge is will appear from through VOUT after a period of time, according to time order and function order, these
There is position respectively A, B, C, D ... E, F in possible rising edge；Due to opening twilight sunset display function, these rising edges are complete
It is shown in oscillograph screen, forms a banding twilight sunset；If the rotation period of magnet ring and copped wave sampling period are precisely whole
Several times relation, then rising edge will appear in fixed position, therefore need to adjust the rotating speed of magnet ring so that the twilight sunset of rising edge is wide
Degree reaches maximum；The time difference of the twilight sunset width, i.e., earliest rising edge and rising edge the latest of A to F is now measured, as
Copped wave postpones TCD.
3. Hall switch sensor copped wave delay measuring method according to claim 2, it is characterised in that：
The level of VOUT can only be updated in the copped wave sampling instant of sensor, when when environmental magnetic field is just beyond BOP, tA
Carve, if just running into copped wave sampling instant, it is assumed that VOUT starts to be high level, then VOUT is just changed into low level, is earliest may be used
The trailing edge that can occur；If copped wave sampling does not occur in tA, and just occurs until tB, then trailing edge just occurs
At B, by that analogy；Under worst condition, before copped wave sampling instant just appears in the tA moment, then have to wait for next
Copped wave is sampled, i.e. at the tF moment, VOUT can just be changed into low level, be the trailing edge position being likely to occur the latest；So A to F when
Between span be exactly copped wave of concern postpone, the time difference of i.e. earliest trailing edge and trailing edge the latest.
4. Hall switch sensor copped wave delay measuring method according to claim 2, it is characterised in that：
In step S1, supply voltage is 3V~30V.
5. a kind of Hall switch sensor copped wave delay measurements system, it is characterised in that the measuring system includes：Including one
The individual device (100) for producing cyclically-varying magnetic field, dc source (200), oscillograph (300) and Hall switch to be measured
Sensor (400), copped wave delay measurements module；
Hall switch sensor comprise at least 3 pins, be respectively power supply VCC, GND and output VOUT；Wherein VCC is connected
To the positive output end of dc source；GND is connected to the earth terminal of dc source and the earth terminal of oscillograph；VOUT is connected to oscillography
The positive input terminal of device；The device for producing cyclically-varying magnetic field is in this example a magnet ring, comprising at least one pair of magnetic pole, and S
When being extremely close to, the maximum magnetic field strength that Hall sensor is sensed is more than BOP；When N is extremely close to, Hall sensor is sensed most
Small magnetic field intensity is less than BRP；The magnet ring at the uniform velocity rotation clockwise or counterclockwise；
The copped wave delay measurements module is used to set oscillograph for triggering pattern, output signal after being opened with oscillograph (300)
The rising edge of the square wave of VOUT is used as triggering edge, while opening the twilight sunset display function of oscillograph, the twilight sunset display time is set to nothing
Poor big or setting time, setting time is appropriate regulation screen display time scale, environmental magnetic field intensity BX more than or equal to 3 seconds
Dull increase in testing herein；BOP is that magnetic operating point threshold value BOP is steady state value；BX initial times are less than BOP, final moment meeting
More than BOP；The sensor output waveform shown on oscillograph is VOUT；R is the rising edge for triggering in VOUT waveforms, is passed through
A period of time after VOUT will appear from trailing edge, according to time order and function order, these possible trailing edges occur position respectively A,
B、C、D……E、F；Due to opening twilight sunset display function, these trailing edges are all shown within oscillograph screen, form one
Banding twilight sunset；If the rotation period of magnet ring and copped wave sampling period are precisely integral multiple relation, then trailing edge will be appeared in
Fixed position, therefore the rotating speed of magnet ring need to be adjusted so that the twilight sunset width of trailing edge reaches maximum；Now measure the twilight sunset of A to F
The time difference of width, i.e., earliest trailing edge and trailing edge the latest, as copped wave postpone TCD；
Or, the copped wave delay measurements module is used to set oscillograph for triggering pattern, is exported after being opened with oscillograph (300)
The trailing edge of the square wave of signal VOUT is used as triggering edge, while opening the twilight sunset display function of oscillograph, the twilight sunset display time sets
It is infinitely great or setting time, setting time is appropriate regulation screen display time scale, wherein environment magnetic more than or equal to 3 seconds
Field intensity BX is dull in testing herein to be reduced；Magnetic point of release threshold value BRP is steady state value；BX initial times are more than BRP, final moment
BOP can be less than；The sensor output waveform shown on oscillograph is VOUT；R is the trailing edge for triggering, warp in VOUT waveforms
VOUT will appear from rising edge after a period of time, and according to time order and function order, these possible rising edges position occur and are respectively
A、B、C、D……E、F。
6. Hall switch sensor copped wave delay measurements system according to claim 5, it is characterised in that：
Due to opening twilight sunset display function, these rising edges are all shown within oscillograph screen, form a banding 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 fixed position,
Therefore the rotating speed of magnet ring need to be adjusted so that the twilight sunset width of rising edge reaches maximum；Now measurement A to F persistence width,
The time difference of i.e. earliest rising edge and rising edge the latest, as copped wave postpones TCD.
7. Hall switch sensor copped wave delay measurements system according to claim 5, it is characterised in that：
The Hall sensor is located at outside magnet ring, or within magnet ring.
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