CN103455021B - Change detecting system and method - Google Patents
Change detecting system and method Download PDFInfo
- Publication number
- CN103455021B CN103455021B CN201210177350.6A CN201210177350A CN103455021B CN 103455021 B CN103455021 B CN 103455021B CN 201210177350 A CN201210177350 A CN 201210177350A CN 103455021 B CN103455021 B CN 103455021B
- Authority
- CN
- China
- Prior art keywords
- change
- output
- accumulator
- frequency divider
- signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
Abstract
A kind of change for detecting special parameter in the background drifted about by background and prove special parameter change qualified change detecting system and method, this system includes: sensor (100), is used for sensing change；Accumulator (300), adds up to the change sensed for being spaced with the very first time in relatively short cycle, and the end being spaced in each very first time provides the instruction output relative to the cumulative change of reference value；Comparator (400), for comparing the output of accumulator (300) with predetermined change acceptance condition, with when satisfied change acceptance condition, it is provided that indicate the output signal of qualified change and the output of accumulator (300) is reset to reference value；And compensator (500), for the end of the second time interval in the relatively long cycle, if the output of accumulator is less than changing acceptance value, by the output of accumulator (300) towards reference value adjustments, thus at least partly to background drift.
Description
Technical field
The present invention relates to a kind of system and method changing detection, especially relate to the system and method changing detection of a kind of operation for controlling electrical equipment.
Background technology
Currently, great majority change detecting system is realized by the method using parameter measurement.The method of known parameter change detecting system often relies on the difference between the intensity measuring the parameter at sense node and fixed reference or threshold value.When the difference measured exceedes threshold value, conclude and qualified change detected.The shortcoming of described method includes limited dynamic range, is confined to once go up electric calibration or easily by the interference of environmental factors (such as drift or noise).
The present invention wants reduce or at least alleviate described shortcoming by providing new or other the change detecting system of improvement and method.
Summary of the invention
According to the first aspect of the invention, it is provided that a kind of change for detecting special parameter in the background drifted about by background and prove special parameter change qualified change detecting system, this change detecting system includes:
Sensor, is used for sensing described change；
Accumulator, adds up to the described change sensed by described sensor for being spaced with the very first time in relatively short cycle, and the end being spaced in each very first time provides the instruction output relative to the cumulative change of reference value；
Comparator, for comparing the output of described accumulator, when meeting described change acceptance condition with predetermined change acceptance condition, it is provided that indicate the output signal of qualified change and the output of described accumulator is reset to reference value；And
Compensator, in the end of second time interval in relatively long cycle, if the output of described accumulator is less than changing acceptance value, by the output of described accumulator towards described reference value adjustments, thus at least partly to described background drift.
Preferably, the output signal of described comparator includes the first output signal indicating qualified change and for the output of described accumulator resets to the second output signal of reference value.
Preferably, described compensator includes timer, and this timer is for the second time interval counter, and the output signal of described comparator is also arranged to reset described timer to count the second time interval from starting.
It is further preferred that the output signal of described comparator includes separate output signal, to reset described timer, thus the second time interval is counted from starting.
It is further preferred that described timer is suitable to count the second time interval according to the cycle and start the new cycle when reset.
It is further preferred that compensator includes cross reference detector, for striding across reference value to detect the output of accumulator and to reset timer as response and the second time interval is counted from starting.
In a preferred embodiment, described accumulator is suitable to the output with their own, the change that described output adds up with one or more predetermined cell value instructions relative to reference value.
In a preferred embodiment, described compensator is suitable to the output of described accumulator towards the predetermined cell value of described reference value adjustments.
It is highly preferred that described compensator is suitable to the output of described accumulator towards the described predetermined cell value of described reference value adjustments one.
In a preferred embodiment, described change detecting system includes providing the signal processor between sensor and accumulator, and this signal processor is for being converted into the described change sensed by sensor for the second form by described accumulator operation from the first form.
It is highly preferred that described sensor is suitable to export analogue signal, and described signal processor is suitable to be converted into for the digital signal by described accumulator operation described analogue signal.
Even more preferably, described signal processor includes frequency lock loop.
The most even more preferably, described frequency lock loop includes the oscillator being connected to first frequency divider, this oscillator, for from sensor reception signal, also includes being connected to the reference oscillator of second frequency divider, the frequency detector providing output and frequency divider to be connected to and a frequency divider from output to frequency divider for regulation one frequency divider so that it exports the feedback path that the output with another frequency divider substantially matches.
The most even more preferably, described first frequency divider is variable frequency divider, and described second frequency divider is fixed frequency divider.
According to the second aspect of the invention, it is provided that a kind of change for detecting special parameter in the background drifted about by background and prove special parameter change qualified method, the method includes:
Thering is provided sensor, this sensor is used for sensing described change；
There is provided accumulator, described sensor the described change sensed is added up by this accumulator for being spaced with the very first time in relatively short cycle, and the end being spaced in each very first time provides the instruction output relative to the cumulative change of reference value；
Thering is provided comparator, this comparator is used for comparing the output of described accumulator with predetermined change acceptance condition, and when meeting described change acceptance condition, it is provided that indicate the output signal of qualified change and the output of described accumulator is reset to reference value；And
Compensator is provided, this compensator is in the end of second time interval in relatively long cycle, if the output of described accumulator is less than changing acceptance value, by the output of described accumulator towards described reference value adjustments, thus at least partly to described background drift.
Preferably, described change detection method is included in the output signal of described comparator the first output signal of the change providing instruction qualified and for the output of described accumulator resets to the second output signal of reference value.
Preferably, described change detection method is included in described compensator and provides timer, this timer is for the second time interval counter, and the output signal of described comparator is arranged to also to reset described timer to count the second time interval from starting.
It is further preferred that described change detection method is included in the output signal of described comparator provides separate output signal, to reset described timer, thus described second time interval is counted from starting.
It is further preferred that described change detection method includes using described timer count the second time interval according to the cycle and start the new cycle when reset.
Preferably, described change detection method is included in described compensator offer cross reference detector, and this cross reference detector is for striding across described reference value to detect the output of described accumulator and to reset described timer as response and count the second time interval from starting.
In a preferred embodiment, described change detection method includes making described accumulator be suitable to the output with their own, the change that described output adds up with one or more predetermined cell value instructions relative to reference value.
In a preferred embodiment, described change detection method includes making described compensator to be suitable to the output of described accumulator towards the predetermined cell value of described reference value adjustments.
It is highly preferred that described change detection method includes so that described compensator is suitable to the output of described accumulator towards the described predetermined cell value of described reference value adjustments one.
In a preferred embodiment, described change detection method is included between described sensor and accumulator offer signal processor, and this signal processor is for being converted into the described change sensed by described sensor for the second form by described accumulator operation from the first form.
It is highly preferred that described change detection method includes making described sensor to be suitable to export analogue signal, and make described signal processor be suitable to described analogue signal to be converted into for the digital signal by described accumulator operation.
Even more preferably, described signal processor includes frequency lock loop.
The most even more preferably, described frequency lock loop includes the oscillator being connected to first frequency divider, this oscillator, for from described sensor reception signal, also includes being connected to the reference oscillator of second frequency divider, the frequency detector providing output and described frequency divider to be connected to and a frequency divider from output to frequency divider for regulation one frequency divider so that it exports the feedback path that the output with another frequency divider substantially matches.
The most even more preferably, described first frequency divider is variable frequency divider, and described second frequency divider is fixed frequency divider.
Accompanying drawing explanation
Now will the most by way of example, the present invention is more specifically described, wherein with reference to accompanying drawing:
Fig. 1 is the functional block diagram of the embodiment of the change detecting system according to the present invention and method, and described system includes accumulator, compensator and comparator；
Fig. 2 is the functional block diagram of the accumulator of Fig. 1；
Fig. 2 A-1 to 2A-4 is the exemplary waveform diagrams of signal at each input of the accumulator of Fig. 2 and output；
Fig. 3 is the functional block diagram of the compensator of Fig. 1；
Fig. 4 is the functional block diagram of the compensator of Fig. 1；
Fig. 4 A-1 and Fig. 4 A-2 is the exemplary waveform diagrams of the signal at the input of the compensator of Fig. 4 and output；
Fig. 5 is the functional block diagram of the signal processor of the change detecting system of Fig. 1 and method；And
Fig. 5 A-1 and Fig. 5 A-2 is the exemplary waveform diagrams of the signal at the input of the signal processor of Fig. 5 and output.
Detailed description of the invention
With reference to accompanying drawing, it is shown that according to the change detecting system that the change of change detection method the change and proof special parameter for detecting special parameter in the background drifted about by background of implementing the present invention is qualified.This change detecting system is set up to form the circuit shown in Fig. 1 by carrying supply sensor 100, signal processor 200, accumulator 300, comparator 400 and the compensator 500 linked together.Detect change by it and prove that changing qualified parameter can be any suitable physical parameter, such as voltage, electric current, light, pressure, magnetic field, resistance, electric capacity, inductance and heat etc..Change detecting system and method may be used for controlling the operation of electrical equipment, such as utilize the sensor 100 being positioned on lamp seat to open and close desk lamp.
It is that the sensor 100 of the generally sense node of regulation can use the one in following various forms, such as electric wire (helical or the copper cash of insulation), wire loop or coil, PCB mark or pattern etc..Sensor 100 is for by that carry with reference to it and export, at it, the signal presented at 101 and sense or obtain change, then described signal is fed back to accumulator 300 and is cumulatively added device 300 and receives for operation, is then processed into suitable form by signal processor 200.
Sensor 100, the same with any electric conductor, typically from the environment (so-called background signal) of surrounding but obtain and carry the signal of telecommunication of the most very weak electromagnetic property that can detect.Background signal always by background drift and/or cumulative system mistake noise by the little change of continuous print, when nigh environment exists by especially by another signal vehicle of the finger of such as people close to or subsequently leave in the neighbouring environment caused when changing suddenly, also having sudden change or the change of moment, the change of this sudden change or moment becomes apparent from.In the case of the change of above-mentioned moment, sensor 100 the signal moment generated changes the pattern of its frequency or frequency, and this change presented at the output 101 of sensor is processed and be converted into change signal delta IN by signal processor 200.
Signal processor 200 has output 201 and includes digital output circuit (such as, frequency detector) 208, and this digital output circuit 208 provides a bit digital signal at output 201, and this bit digital signal is for changing Δ IN.The change Δ IN of one bit digital form can be 1 or 0,1 representative change (such as, the increase of frequency) with a direction, 0 representative change in the opposite direction is (such as, the minimizing of frequency) or do not change (that is, frequency not changing), see Fig. 2 A-1 and 5A-2.
Accumulator 300 is digital circuit, to be spaced T1 (be referred to as detection during (period) or cycle (cycles)) between predetermined first in relatively short cycle, receive and add up this digital circuit the change Δ IN sensed by sensor 100, is then in interval T1 of each very first time or the end in detection cycle provides the instruction change added up relative to reference value in its output 301Signal.Can be signal processor 200 a part agitator with such as the frequency of the detection of accumulator and the 256Hz of accumulation operations to generate clock signal, thus time interval T1 is about 4ms.The output 301 of accumulator 300 is programmed to such as the initial reference value byte value as binary form of " 10000000 ", and described initial reference value is also the value when powering on or reset accumulator 300.
By cumulative change Δ IN, accumulator 300 has its output signal, and described output signal represents the cumulative change changed in one direction in each detection cycleSuch as, each change Δ IN for " 1 " increases, or the cumulative change changed in the opposite directionSuch as, each change Δ IN for " 0 " reduces.Accumulator 300 storage value, i.e. cumulative changeIt starts with initial reference value and changes according to change Δ IN in time course.In interchangeable analog systems, accumulator 300 is integrated circuit.
More specifically, cumulative changeOne-level will be increased for each change Δ IN of " 1 ", or each change Δ IN for " 0 " will reduce one-level.Can see in Fig. 2 A-4 and showing relative to the time (that is, x-axis) about the waveform of the generation of the change of the cumulative change Δ IN of reference value (value zero i.e., on the y axis).Described one-level has the constant height along y-axis or value, and it represents predetermined cell value, cumulative changeChange with one or more cell values relative to reference value.
In general environment, when a part is drifted about by the background caused by background and system noise and be may be considered random, it generally remains in little scope.So, accumulator 300 the cumulative change storedGenerally relate to reference value swing in little scope, such as, at reference value above and below two-stage (Fig. 2 A-4).
Reference comparator 400, it is another digital circuit with a pair first and second outputs 401 and 402, and described first and second outputs can be from two paths of public output.Comparator 400 is programmed to the cumulative change at by the output 301 of accumulator 300Compare with predetermined change acceptance condition.When change acceptance condition meets, comparator 400 indicates the output signal of the qualified change identified by providing at its first output 401, and will export 402 at the output 301 of accumulator 300 by value (that is, cumulative change via second) reset back to initial reference value " 10000000 ".
In this specific embodiment, predetermined change acceptance condition is to increase (that is, with the change in the direction of a usual regulation) from reference value " 10000000 " (that is, predetermined scope) or reduce (change i.e., in a reverse direction) three above-mentioned levels.It is detected as increase by the first comparison circuit 403 and carrys out testing conditions, and carried out testing conditions by the second comparison circuit 404 for minimizing, by OR(or) output of its described first comparison circuit and the second comparison circuit combined to trigger monostable circuit by door 405, this monostable circuit then the output signal detection with the qualified change of instruction and replacement accumulator 300 are provided at output 401 and 402.Monostable circuit 406 is used for restricting output and maintaining output stable.
Be indicated generally at user finger proximity transducer 100(such as, on the pedestal of desk lamp) the first output 401 at qualified change condition may be used in lighting circuit, thus open and close lamp.
In Fig. 4 A-1, the change acceptance condition increasing by three grades is satisfied at time t1, and the change acceptance condition reducing three grades detected at time t2 subsequently, thus cumulative in each situation changeMoment is reset to zero (that is, initial reference value " 10000000 ").Output signal at output 401 and 402 is shown as flashy positive pulse and the negative pulse of the second moment by Fig. 4 A-2.
301 being reset as initial reference value " 10000000 " by its output, that change or new condition as background, or is initialised by accumulator 300, and thus prepares for changing from the described background detection next one.Change detecting system that qualified change as background and is extended this theme by the behavior continuously and the dynamic detection range of method.
If causing the first change from the finger proximity transducer 100 of user, then may be caused ensuing change by finger leaving subsequently, this change can also be detected by the change detecting system of this theme and method, as shown in the waveform in Fig. 4 A-1 and 4A-2.The change of the described pairing lattice within the time cycle of certain section can be as the signal of the confirmation for operating electrical equipment from user.
With reference now to compensator 500, it has output 501, timer 502, suspends circuit 503 and cross reference detector 504.Second predetermined time interval T2 in relatively long cycle (such as, 500ms) is counted by timer 502, and expiring of described second time interval is arranged to trigger time-out circuit 503 to provide signal at output 501SignalAs halt signal, this halt signal is fed back to reset enumerator, thus its again from from the beginning of (that is, from the beginning of the next one counting cycle) time interval T2 is counted.In the general environment being not detected by qualified change, the frequency (corresponding to the cycle of 500ms) with 2Hz being periodically repeated time interval T2, it is properly termed as the update cycle.
Signal in the case of compensator output 501 is also connected to accumulator 300Topmost use, in cumulative changeIt is less than or remains less than predetermined change acceptance value (i.e., three grades) or when being also not detected by qualified change, (that is, on the predetermined time cycle of 500ms) the cumulative change in accumulator 300 is will be stored in current or each time interval T2 related to(being apparent in it to export at 301) towards reference value adjustments one-level (it is the level with the same as above).
By signalRegulation be used for providing at least part of compensation to background drift, although typically small described background drift can be relatively long-term (such as, several hours) main by being altered or varied that the change in atmospheric condition (that is, temperature, humidity and/or pressure) causes.Regulation makes the close main background condition of the value little by little (such as, one-level) of storage in accumulator 300, i.e. background regulates, so that accumulator 300 can adapt to background drift or noise for optimum operation.So, signalAlso referred to as compensate signal
In addition to above-mentioned time-out, the also condition of two kinds of replacements performing timer 502 wherein.
First, when qualified change being detected, in the case of its second output is also connected to timer 502, timer 502 is reset to start the next counting cycle by comparator 400, reset in the time identical with identical output 402 or recover accumulator output 301(i.e., cumulative change) become initial reference value " 10000000 ", i.e. initialization background.The reset signal recovering accumulator 300 can be as initialization background signal INIT_BG, and it also resets timer 502 in accumulator 500.
Second, 301 cumulative change detected striding across and/or reaching the accumulator output of initial reference valueTime, cross reference detector 504 will reset timer 502 to start the next counting cycle.In said two condition, at accumulator from about general original state (i.e., value of its storage is just reaching or is just striding across reference value " 10000000 ") when restarting, timer 501 should also restart the new counting cycle to maximize the effect of compensator 500.
According to described above, compensator 500 monitors the output 301(of accumulator 300 i.e. continuously, cumulative change) and determine whether and properly need background to regulate, then perform background regulation.
For circuit design, accumulator 300 includes forward-backward counter 302, the change that the storage of this forward-backward counter is cumulativeAnd there is the output as accumulator output 301, a pair respectively forward of control counter 302 and multiplexer that reversely (counting) inputs 303 and 304 and the change that adds up in output 301 monitoringComparator circuit 305.Enumerator 302 has the replacement pin being connected to compensator output 402, for being reset when qualified change being detected by initialization background signal INIT_BG.If cumulative changeMore than or equal to initial reference value, compensator circuit 305 will export logical one, if or cumulative changeLess than initial reference value, logical zero will be exported.
Multiplexer 303 and 304 be arranged to general by sensor 100(the most i.e., change Δ IN) output be delivered to enumerator 302, or once in a while at the compensation signal of origin self compensation device 500The output of compensator circuit 305 is transmitted during triggering.
During each detection cycle, multiplexer 304 and 305 transmission changes Δ IN and adds 1 with flip-flop number 302 for " 1 " change Δ IN counting, or subtracts 1(Fig. 2 A-1 and 2A-4 for " 0 " change Δ IN counting).Thus, forward-backward counter 302 reference time interval T1(i.e., detects the cycle) driven by clock, and each time interval T1 enumerator 302 is counted forward or backwards according to the signal being apparent in its forward or reverse input.This operation will be repeated cyclically for accumulator 300, with from sensor 100 gather information, until reaching to compensate signal(Fig. 2 A-2).
When reached during clock signal, i.e. compensate signalForward and the reverse input of enumerator are controlled by comparison circuit 305 momently, and the cumulative change stored with regulating enumerator(Fig. 2 A-4).If cumulative changeDuring more than or equal to initial reference value, flip-flop number 302 counting is subtracted 1 by comparator circuit 305, if or cumulative changeDuring less than initial reference value, counting adds 1, thus by cumulative changeTowards reference value near regulation one-level.This operation by do not have in the case of above-mentioned qualified change suspend time carry out.
When qualified change being detected, initialization background signal INIT_BG(Fig. 2 A-3) by replacement enumerator 302 to have zero storage value, i.e. zero cumulative changeThus accumulator 300 will continue operation based on new state.
Turning now to the processor 200 of the output for processing sensor 100, it is substantially frequency lock loop.For circuit design, have and be connected to the oscillator 202 of variable frequency divider 203, the reference oscillator 205 being connected to fixed frequency divider 206 and the frequency detector (that is, digital output circuit) 208 providing output 201 and two its output of frequency divider 203 and 206 to be connected to.Export the signal at 201 to feed back for regulation variable frequency divider via the feedback path 209 extending to variable frequency divider 203 from output 201.
The physical parameter (electric capacity in such as this embodiment) sensed by sensor 100 is converted into the frequency of unidirectional change along with the instantaneous change in dynamic range interested by oscillator 202.The agitator of each form, including RC, LC, LRC or the agitator with constant current source for the inductance being charged equipment/discharge or at stimulus sensor 100, is the possible alternative of this oscillator 202.
The output of oscillator 202 is divided and detects for frequency detector 208 with establishment output frequency 204 " Fv+ Δ Fv " by variable frequency divider 203, and described output frequency changes along with the physical parameter at sensor 100.The divisor of this frequency divider 203 will change along with the output (201) of frequency detector 208 via path 209 based on feedback signal, thus drive " Fv+ Δ Fv " substantially to mate or the output frequency 207 " Fr+ Δ Fr " of Mean match fixed frequency divider 206, thus perform automatic calibration operation.Output frequency " Fv+ Δ Fv " can be the above-mentioned 256Hz clock signal determining time interval T1, maybe can include above-mentioned 265Hz clock signal.
Reference oscillator 205 can be RC agitator, LC agitator, LRC agitator, controlled current source agitator or crystal oscillator etc..Fixed frequency divider 206 uses the output of reference oscillator 205 as input and to be divided into certain fixed number to produce " the Fr+ Δ Fr " of frequency detector 208 to compare with " Fv+ Δ Fv ".
Frequency detector 208 compares " Fv+ Δ Fv " and " Fr+ Δ Fr ", and at output 201 generation signal, described signal represents the difference between " Fv+ Δ Fv " and " Fr+ Δ Fr ".The output signal (201) of frequency detector 208 can be total value difference, or simply instruction " Fv+ Δ Fv " frequency 204 is above or below the sign bit of " Fr+ Δ Fr ".Output signal thus process the information of the instruction instantaneous knots modification at sensor 100.This signal is the most just being used as proving that what sensor 100 sensed changes qualified input.
Utilizing this treatment technology, the change that sensor 100 senses is converted into it and exports the signal at 201 by signal processor 200, and to provide the information of instruction knots modification, variable frequency divider 203 will compensate background drift and system noise etc. simultaneously.
It should be noted that also to be able within the scope of the invention use variable frequency divider in reference oscillator side and fixed oscillator side.Variable frequency divider is used to have further post and telecommunications in reference side, plurality of variable frequency divider may be used for multiple spot and detects in real time, wherein for one variable frequency divider of each test point, for detecting identical physical parameter or even not same physical parameter.Or, in the case of using loadable frequency divider, it is possible to for having each test point just detected by the multiple spot of time multiplexing, there is a divider value.
It is also to be noted that fixed frequency divider can be removed and operating principle remains in that as having the divisor particular case equal to " 1 ".
Above-mentioned it is used together frequency lock loop and the qualified technology of instantaneous change provides the most integrated high-performance instantaneous change detector.Precision as the fixed oscillator 205 of reference tails off, because the system noise effect of accumulation that above-mentioned automatic calibration operation successive elimination is especially caused by the shortcoming of the reference fixed oscillator 205 in traditional method.
Being appreciated that according to how generating this clock signal, the above-mentioned very first time, interval T1 can be rule, or can be erratic.Such as, in the case of time interval T1 is generated by oscillator 202, it is erratic.
It should be noted that single-ended sensor or sense node may apply to neighbouring or touch-sensing etc..Different sense node may apply to neighbouring, touch, dielectric sensing etc..For example, it is possible to perform the sensing of fluids/gases interface stream in the non-conductive pipe on suitably accurate target area with different capacitance sensings.Single-ended sensor can be used for fluid detection.
It is envisioned that described standard on data, in the cycle that the frequency of such as level or progression or cell value and detection cycle and update cycle is relevant with it, it is merely possible to the mode of the example in this particular implementation and is described.The essence, background to be used or the environment that select to select based on circuit design, physical parameter of described standard on data and required sensitivity or response etc. are as required or changing of being understood.Thus, when the most predetermined change acceptance value is selected as three grades, in various embodiments can be by concluding qualified change with reference to different progression (such as, two-stage).
The change detecting system of the present invention and method are incorporated with the drift of continuous print background and/or noise compensation, continuous print are calibrated automatically and practically unlimited dynamic range, being suitable to use in the sensing product of wide scope, described sensing product includes but not limited to capacitance sensor and fluid sensor.Thus, change detecting system or method has the following advantages, i.e. generally it eliminates or alleviates the most greatly background drift and the impact of system noise, and improves the dynamic range of instantaneous change detection.
Give the present invention the most by way of example, those skilled in the art described embodiment can be made without departing from the scope of the invention various other amendment and/or change.
Claims (28)
1. one kind is used for detecting the change of special parameter in the background drifted about by background and proving specific
Parameter change qualified change detecting system, this change detecting system includes:
Sensor, this sensor is used for sensing described change；
Accumulator, this accumulator was spaced to by described biography for the very first time with the relatively short cycle
The described change that sensor senses adds up, and the end being spaced in each very first time provides instruction phase
Output for the change that reference value adds up；
Comparator, this comparator is for carrying out the output of described accumulator with predetermined change acceptance condition
Comparison, and when meeting described change acceptance condition, it is provided that indicate the output signal of qualified change and incite somebody to action
The output of described accumulator resets to reference value；And
Compensator, this compensator is used for: in the end of second time interval in relatively long cycle,
If the output of described accumulator is less than changing acceptance value, by the output of described accumulator towards described ginseng
Examine value regulation, thus at least partly to described background drift.
Change detecting system the most according to claim 1, the output signal of wherein said comparator
Including indicating the first output signal of qualified change and for the output of described accumulator is reset to institute
State the second output signal of reference value.
Change detecting system the most according to claim 1, wherein said compensator includes timer,
This timer is used for described second time interval counter, and the output signal of described comparator is also pacified
Row is for resetting described timer to count described second time interval from starting.
Change detecting system the most according to claim 3, the output signal of wherein said comparator
Including independent output signal, this independent output signal is used for resetting described timer, thus from from the beginning of
Described second time interval is counted.
Change detecting system the most according to claim 3, wherein said timer was suitable to according to week
Described second time interval is counted and starts the new cycle when reset by the phase.
Change detecting system the most according to claim 3, wherein said compensator includes intersecting joins
Examining detector, this cross reference detector is for striding across described reference value to detect the output of described accumulator
And reset described timer as response and described second time interval is counted from starting.
7. according to the change detecting system described in claim any one of claim 1-6, Qi Zhongsuo
State the output that accumulator is suitable to have their own, this output relative to described reference value with one or more pre-
Fixed cell value indicates described cumulative change.
8. according to the change detecting system described in claim any one of claim 1-6, Qi Zhongsuo
State compensator to be suitable to the output of described accumulator towards the predetermined cell value of described reference value adjustments.
Change detecting system the most according to claim 7, wherein said compensator is suitable to described
The output of accumulator is towards the described predetermined cell value of described reference value adjustments one.
10. according to the change detecting system described in claim any one of claim 1-6, described in change
Become detecting system to include providing the signal processor between described sensor and described accumulator, this signal
Processor is for being converted into the described change sensed by described sensor for by described from the first form
The second form of accumulator operation.
11. change detecting systems according to claim 10, wherein said sensor is suitable to output
Analogue signal, and described signal processor is suitable to be converted into described analogue signal grasped by described accumulator
The digital signal made.
12. change detecting systems according to claim 11, wherein said signal processor includes
Frequency lock loop.
13. change detecting systems according to claim 12, wherein said frequency lock loop bag
Including the oscillator being connected to first frequency divider, this oscillator is for connecing from described sensor
The collection of letters number, described frequency lock loop also includes being connected to the reference oscillator of second frequency divider, carrying
Supply the frequency inspection that output and described first frequency divider and described second frequency divider are connected to
Survey device and from described output to described first frequency divider and described second frequency divider one
Frequency divider for regulation one frequency divider so that its output with another frequency
The feedback path that the output of divider substantially matches.
14. change detecting systems according to claim 13, wherein said first frequency divider
It is variable frequency divider, and described second frequency divider is fixed frequency divider.
15. 1 kinds for detecting the change of special parameter and proving specific in the background drifted about by background
Parameter change qualified change detection method, this change detection method includes:
Thering is provided sensor, this sensor is used for sensing described change；
Thering is provided accumulator, this accumulator was spaced to by institute for the very first time with the relatively short cycle
State the described change that sensor senses to add up, and the end being spaced in each very first time provides and refers to
Show the output of the cumulative change relative to reference value；
Thering is provided comparator, this comparator is for by the output of described accumulator and predetermined change acceptance condition
Compare, and when meeting described change acceptance condition, it is provided that indicate the output of qualified change to believe
Number and the output of described accumulator is reset to reference value；And
Thering is provided compensator, this compensator is used for: at the end of second time interval in relatively long cycle
Place, if the output of described accumulator is less than changing acceptance value, by the output of described accumulator towards described
Reference value adjustments, thus at least partly to described background drift.
16. change detection methods according to claim 15, this change detection method is included in institute
State the first output signal of the change providing instruction qualified in the output signal of comparator and for by described
The output of accumulator resets to the second output signal of described reference value.
17. change detection methods according to claim 15, this change detection method is included in institute
Stating compensator and provide timer, this timer is used for the second time interval counter, and by described comparison
The output signal of device is arranged to also to reset described timer to carry out described second time interval from starting
Counting.
18. change detection methods according to claim 17, this change detection method is included in institute
Stating the output signal providing independent in the output signal of comparator, described independent output signal is used for resetting
Described timer, thus described second time interval is counted from starting.
19. change detection methods according to claim 17, this change detection method includes using
Described second time interval is counted according to the cycle and starts new when reset by described timer
Cycle.
20. change detection methods according to claim 17, this change detection method is included in institute
Stating offer cross reference detector in compensator, this cross reference detector is used for striding across described reference value
Detect the output of described accumulator and reset described timer in time starting described second as response
Between be spaced and count.
21. according to the change detection method described in claim any one of claim 15-20, and this changes
Becoming detection method to include making described accumulator be suitable to the output with their own, this output is relative to described ginseng
Examine the change that value adds up with one or more predetermined cell value instructions.
22. according to the change detection method described in claim any one of claim 15-20, and this changes
Become detection method and include that making described compensator be suitable to the output of described accumulator adjusts towards described reference value
Save predetermined cell value.
23. change detection methods according to claim 21, this change detection method include so that
Described compensator is suitable to described predetermined towards described reference value adjustments one for the output of described accumulator
Cell value.
24. according to the change detection method described in claim any one of claim 15-20, and this changes
Become detection method and be included between described sensor and described accumulator offer signal processor, at this signal
Reason device is for being converted into the described change sensed by described sensor for by described tired from the first form
Add the second form of device operation.
25. change detection methods according to claim 24, this change detection method includes making institute
State sensor to be suitable to export analogue signal, and make described signal processor be suitable to described analogue signal to turn
Change into by the digital signal of described accumulator operation.
26. change detection methods according to claim 25, wherein said signal processor includes
Frequency lock loop.
27. change detection methods according to claim 26, wherein said frequency lock loop bag
Including the oscillator being connected to first frequency divider, this oscillator is for connecing from described sensor
The collection of letters number, described frequency lock loop also includes being connected to the reference oscillator of second frequency divider, carrying
Supply the frequency inspection that output and described first frequency divider and described second frequency divider are connected to
Survey device and a frequency from output to described first frequency divider and described second frequency divider
Divider for regulation one frequency divider so that its output with another frequency division
The feedback path that the output of device substantially matches.
28. change detection methods according to claim 27, wherein said first frequency divider
It is variable frequency divider, and described second frequency divider is fixed frequency divider.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210177350.6A CN103455021B (en) | 2012-05-31 | 2012-05-31 | Change detecting system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210177350.6A CN103455021B (en) | 2012-05-31 | 2012-05-31 | Change detecting system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103455021A CN103455021A (en) | 2013-12-18 |
| CN103455021B true CN103455021B (en) | 2016-08-24 |
Family
ID=49737510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210177350.6A Expired - Fee Related CN103455021B (en) | 2012-05-31 | 2012-05-31 | Change detecting system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103455021B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9921239B2 (en) * | 2014-11-20 | 2018-03-20 | Stmicroelectronics, Inc. | Offset cancellation device for micro-electromechanical system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11327582A (en) * | 1998-03-24 | 1999-11-26 | Matsushita Electric Ind Co Ltd | Voice detection system in noist environment |
| CN1953333A (en) * | 2006-11-14 | 2007-04-25 | 北京中星微电子有限公司 | Signal processing method and device |
| CN101105126A (en) * | 2007-08-03 | 2008-01-16 | 重庆邮电大学 | Logging-while-drilling orientation measurement error compensation method based on micro-quartz angular rate sensor |
| US20100136916A1 (en) * | 2007-04-11 | 2010-06-03 | Nec Corporation | Orthogonal cross polarization interference compensating device, demodulator, receiving station, and method of compensating cross-polarization interference |
| CN101925831A (en) * | 2007-12-14 | 2010-12-22 | 高通股份有限公司 | Motion detection for tracking |
| DE102010001552A1 (en) * | 2010-02-03 | 2011-08-04 | Siemens Aktiengesellschaft, 80333 | Method for determining a background phase course and magnetic resonance apparatus |
-
2012
- 2012-05-31 CN CN201210177350.6A patent/CN103455021B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11327582A (en) * | 1998-03-24 | 1999-11-26 | Matsushita Electric Ind Co Ltd | Voice detection system in noist environment |
| CN1953333A (en) * | 2006-11-14 | 2007-04-25 | 北京中星微电子有限公司 | Signal processing method and device |
| US20100136916A1 (en) * | 2007-04-11 | 2010-06-03 | Nec Corporation | Orthogonal cross polarization interference compensating device, demodulator, receiving station, and method of compensating cross-polarization interference |
| CN101105126A (en) * | 2007-08-03 | 2008-01-16 | 重庆邮电大学 | Logging-while-drilling orientation measurement error compensation method based on micro-quartz angular rate sensor |
| CN101925831A (en) * | 2007-12-14 | 2010-12-22 | 高通股份有限公司 | Motion detection for tracking |
| DE102010001552A1 (en) * | 2010-02-03 | 2011-08-04 | Siemens Aktiengesellschaft, 80333 | Method for determining a background phase course and magnetic resonance apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103455021A (en) | 2013-12-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11716789B2 (en) | Vaporizer device heater control | |
| US8797049B2 (en) | Low power capacitive touch detector | |
| US10761621B2 (en) | Method executed by pen or pen detection apparatus that detects the pen | |
| EP2972110B1 (en) | System and method for energy efficient measurement of sensor signal | |
| CN110320240A (en) | Water detection circuit and electronic device including it | |
| CN104272119B (en) | Module and capacitance determining method | |
| KR20140040691A (en) | Capacitive proximity sensor as well as method for capacitive approximation detection | |
| CN104939927A (en) | Wearing state detecting method and device of intelligent wearable device and intelligent wearable device | |
| US9329226B2 (en) | Method for ascertaining at least one malfunction of a conductive conductivity sensor | |
| CN103455021B (en) | Change detecting system and method | |
| US7944217B2 (en) | Object proximity detector and object position detector | |
| US7825767B2 (en) | System for setting shutdown voltage of electronic device | |
| KR20090043709A (en) | Method and apparatus to judge that mobile equipment is whether it is had on | |
| US20100277351A1 (en) | Capacitive sensing user interfaces and implementation thereof | |
| JP2017003578A (en) | System having photocell and luminosity measurement device and method for measuring luminosity that photocell has received | |
| TWI728830B (en) | Capacity judgment module and capacity calibration method thereof | |
| TWI574193B (en) | Touch sensing device | |
| KR20120121590A (en) | Internal voltage generating circuit | |
| CN110388966A (en) | Air-flow transition detection circuitry and device | |
| CN107295713B (en) | Terminal device and its control method | |
| CN210922685U (en) | Non-contact sensor calibration device and calibration circuit thereof | |
| CN102955629A (en) | Proximity or contact type sensor | |
| US20190056833A1 (en) | Touch panels and methods of examining touch panels | |
| US20130214798A1 (en) | Capacitance measurement circuit and method for measuring capacitance thereof | |
| CN115378418B (en) | Touch key dormancy awakening circuit and awakening method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160824 Termination date: 20180531 |