CN106959119A - The monitoring method and device of Moving Objects - Google Patents
The monitoring method and device of Moving Objects Download PDFInfo
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- CN106959119A CN106959119A CN201710127715.7A CN201710127715A CN106959119A CN 106959119 A CN106959119 A CN 106959119A CN 201710127715 A CN201710127715 A CN 201710127715A CN 106959119 A CN106959119 A CN 106959119A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C23/00—Combined instruments indicating more than one navigational value, e.g. for aircraft; Combined measuring devices for measuring two or more variables of movement, e.g. distance, speed or acceleration
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/10—Plotting field distribution ; Measuring field distribution
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Abstract
Present invention is disclosed a kind of monitoring method of Moving Objects, this method is applied to carry out the monitoring of Moving Objects under between geomagnetic sensor and signal processing circuit coordinating.The sensing carried out by geomagnetic sensor itself determines that the Moving Objects of monitoring enter the service range of geomagnetic sensor.The motion of Moving Objects will produce earth's magnetic field changes in distribution, and the magnetic flux change produced by earth's magnetic field changes in distribution obtains the voltage signal of correspondence variation rate of magnetic flux, voltage signal is inputted to signal processing circuit.The mapping relations for determining to include voltage indicated by voltage signal by signal processing circuit, distance and speed of the corresponding Moving Objects of the voltage according to indicated by the mapping relations obtain voltage signal in motion process.
Description
Technical field
This disclosure relates to sensor application technical field, the monitoring method and device of more particularly to a kind of Moving Objects.
Background technology
Geomagnetic sensor national defense construction, scientific research, health care, conventional industries application and transformation, resource exploration and
The various aspects such as comprehensive utilization, environmental protection, bioengineering, traffic intelligence control, play more and more important effect.It is right
For data acquisition in traffic surveillance and control system, geomagnetic sensor is as the critical component of data acquisition, and its performance is to data
The accuracy of collection plays decisive role.
For example, geomagnetic sensor passes through detection and vehicle cab recognition available for vehicle.It is placed on the earth magnetism on highway side
Sensor can calculate and distinguish the vehicle by sensor, can also detect the length by vehicle；It is positioned over parking stall
Geomagnetic sensor can with registration of vehicle enter parking stall time and parking time.
However, because geomagnetic sensor sensing magnetic flux change as caused by geomagnetic field variation is rapid with the increase of distance
Decay, in the prior art, monitoring of the geomagnetic sensor to Moving Objects is limited by sensing distance.Usual sensing distance exceedes
At 3 meters, geomagnetic sensor can not just be applied to the detection to Moving Objects.
For example, because geomagnetic sensor sensing is limited by distance, freeway toll station can not obtain vehicle and approach
Or away from charge station when distance and speed, ship-board aircraft can not be obtained when being taken off from type aircraft carrier deck ship-board aircraft distance and
Speed.
Therefore, the sensing distance of increase geomagnetic sensor turns into current technical problem urgently to be resolved hurrily.
The content of the invention
In order to solve the less technical problem of geomagnetic sensor sensing distance present in correlation technique, present disclose provides
The monitoring method and device of a kind of Moving Objects.
A kind of monitoring method of Moving Objects, methods described is used to coordinate between geomagnetic sensor and signal processing circuit
Lower progress Moving Objects monitoring, including：
The sensing carried out by the geomagnetic sensor itself determines the Moving Objects of monitoring, the Moving Objects
Motion will produce earth's magnetic field changes in distribution；
The magnetic flux change produced by the earth's magnetic field changes in distribution obtains the voltage signal of correspondence variation rate of magnetic flux,
The voltage signal is inputted to the signal processing circuit；
The mapping relations for determining to include voltage indicated by the voltage signal by the signal processing circuit, are reflected by described
The relation of penetrating obtains the distance and speed that voltage indicated by the voltage signal maps.
A kind of monitoring device of Moving Objects, described device includes：
Moving Objects monitoring modular, the sensing for being carried out by the geomagnetic sensor itself determines the fortune of monitoring
Dynamic object；
Induced voltage acquisition module, the magnetic flux change for being produced by the earth's magnetic field changes in distribution obtains correspondence magnetic
The voltage signal of variations of flux rate；
Motion capture module, for being determined by the signal processing circuit comprising electricity indicated by the voltage signal
The mapping relations of pressure, distance and speed that the voltage as indicated by the mapping relations obtain the voltage signal maps.
The technical scheme provided by this disclosed embodiment can include the following benefits：By the electromagnetism in geomagnetic sensor
The magnetic flux change that inductive pick-up sensing is produced by earth's magnetic field changes in distribution, obtains the voltage letter of correspondence variation rate of magnetic flux
Number.By the size for calculating the detection of the voltage variation rate of magnetic flux.Correspondence identical variation rate of magnetic flux, passes through increase
The number of coils of induction coil obtains bigger induced electromotive force so that geomagnetic sensor can sense more small magnetic flux
Rate of change, so as to increase the sensing distance of geomagnetic sensor.The voltage signal that signal processing circuit is obtained to geomagnetic sensor enters
Row amplification and analog-to-digital conversion process, and the digitized voltage signal of acquisition is filtered, the signal to noise ratio of voltage signal is improved, enters one
Step increases the sensing distance of geomagnetic sensor.
It should be appreciated that the general description of the above and detailed description hereinafter are only exemplary, this can not be limited
It is open.
Brief description of the drawings
Accompanying drawing herein is merged in specification and constitutes the part of this specification, shows the implementation for meeting the present invention
Example, and in specification together for explaining principle of the invention.
Fig. 1 is a kind of flow chart of the monitoring method of Moving Objects shown in an exemplary embodiment；
Fig. 2 is a kind of schematic diagram of the monitoring method of Moving Objects shown in another exemplary embodiment；
Fig. 3 is that Fig. 1 correspondingly implements one kind of step 110 in the monitoring method of Moving Objects that exemplifies and implements flow
Figure；
Fig. 4 is that Fig. 1 correspondingly implements one kind of step 130 in the monitoring method of Moving Objects that exemplifies and implements flow
Figure；
Fig. 5 is a kind of schematic diagram of the monitoring method of Moving Objects shown in another exemplary embodiment；
Fig. 6 is a kind of block diagram of the monitoring device of Moving Objects shown in an exemplary embodiment；
Fig. 7 is a kind of block diagram of the monitoring device of Moving Objects shown in another exemplary embodiment；
Fig. 8 is block diagram of the Moving Objects monitoring modular in one embodiment that embodiment is corresponded to according to Fig. 6；
Fig. 9 is block diagram of the induced voltage acquisition module in one embodiment that embodiment is corresponded to according to Fig. 6.
Embodiment
Here explanation will be performed to exemplary embodiment in detail, its example is illustrated in the accompanying drawings.Following description is related to
During accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represent same or analogous key element.Following exemplary embodiment
Described in embodiment do not represent and the consistent all embodiments of the present invention.On the contrary, they be only with it is such as appended
The example of the consistent apparatus and method of some aspects be described in detail in claims, the present invention.
Fig. 1 is a kind of flow chart of the monitoring method of Moving Objects according to an exemplary embodiment.Such as Fig. 1 institutes
Show, this method comprises the following steps：
In step 110, the sensing carried out by geomagnetic sensor itself determines the Moving Objects of monitoring.
Geomagnetic sensor, refers to become by sensing the earth magnetism field distribution caused by motion of the Moving Objects in earth's magnetic field
Change, and indicate the motion state of Moving Objects and the measurement apparatus of exercise data.Geomagnetic sensor includes magnetoresistive transducer and electricity
Magnetic induction sensor.
Magnetoresistive transducer, refers to the geomagnetic sensor being made using magnetoresistance.
Electromagnetic induction sensor, refers to the geomagnetic sensor being made using electromagnetic induction effect.
Magnetoresistance, refers to the phenomenon that the impedance of the conductor in magnetic field can change.Specifically, when along one it is long and
On the length direction of thin ferrimag apply an electric current, perpendicular to the sense of current apply a magnetic field, then alloy bar from
The impedance of body can change.The impedance variations value is proportional to magnetic field intensity and current strength.Further, if by two pairs
Alloy bar is angled to be placed, in the presence of earth's magnetic field, and the impedance one of two pairs of alloy bars becomes big, and one diminishes.Pass through
Detect electric circuit inspection to the difference of the impedance variations, you can output one and the proportional voltage signal of geomagnetic field intensity.
Electromagnetic induction effect, refers to the magnetic line of force in coil cutting earth's magnetic field and produces induced electromotive force at the two ends of coil
Phenomenon.Or, when coil is moved in magnetic field, produced and inducted at coil two ends caused by the change of the magnetic line of force in coil
The phenomenon of electromotive force.
Exercise data includes the data such as distance, the speed of Moving Objects of Moving Objects and geomagnetic sensor.
No Moving Objects are obtained by magnetoresistive transducer to exist and corresponding geomagnetic field intensity, and with the earth magnetism of acquisition
Field intensity is as referring to geomagnetic field intensity.
Moved as Moving Objects enter in geomagnetic sensor service range, by electromagnetic induction sensor sensing by earth magnetism
The magnetic flux change that field distribution changes and produced, obtains the geomagnetic field intensity obtained due to the motion of the Moving Objects.
The geomagnetic field intensity that is obtained by comparing due to the motion of Moving Objects and geomagnetic field intensity is referred to, according to electromagnetism
The geomagnetic field intensity that inductive pick-up senses the motion of Moving Objects and obtained refers to earth's magnetic field in duration less than this
Intensity, you can it is determined that the Moving Objects of monitoring enter the service range of geomagnetic sensor, so as to realize the monitoring of Moving Objects.
In step 130, the magnetic flux change produced by earth's magnetic field changes in distribution obtains correspondence variation rate of magnetic flux
Voltage signal, voltage signal is inputted to signal processing circuit.
As Moving Objects enter the affiliated service range motion of geomagnetic sensor, cause earth's magnetic field changes in distribution.Pass through ground
The magnetic flux change that electromagnetic induction sensor sensing is produced by earth's magnetic field changes in distribution in Magnetic Sensor, obtains correspondence magnetic flux
The voltage signal of rate of change.
In a specific exemplary embodiment, electromagnetic induction sensor is made based on microelectromechanical systems technique, bag
The ferromagnetic material in the middle of annular resonance and annular resonance is included, induction coil is surrounded on annular resonance and is in series with two ends
Resistance.
When the motion due to Moving Objects causes the magnetic line of force change through annular resonance, being surrounded on, annular is humorous
Induced electromotive force is produced in the induction coil of oscillator.The induced electromotive force is believed by producing voltage with the resistance that induction coil is connected
Number, electromagnetic induction sensor is by sensing the size of variation rate of magnetic flux to the detection of the voltage signal.
In step 150, the mapping relations for determining to include voltage indicated by voltage signal by signal processing circuit, by reflecting
The relation of penetrating obtains the distance and speed that voltage indicated by voltage signal maps.
The voltage signal exported by signal processing circuit to geomagnetic sensor is amplified and analog-to-digital conversion process, is obtained
Digitized voltage signal.To the digitized voltage signal filtering to improve signal to noise ratio, so as to further improve earth magnetism sensing
The distance of device sensing.
Electromagnetic induction sensor obtain corresponding variation rate of magnetic flux voltage signal be one change over time it is continuous
Analog quantity, by the analog quantity sampling and analog-to-digital conversion process, obtain digitized voltage signal.The voltage signal be with
Time is the function of voltage of independent variable.In a specific exemplary embodiment, the function of voltage is monotonic increase or list
Adjust what is successively decreased.
Moved by measuring Moving Objects with the speed set in the service range of geomagnetic sensor, obtain the motion pair
As with geomagnetic sensor apart from versus time curve, by this apart from versus time curve in the different time
Point sampling, obtains the distance function using the time as independent variable.In a specific exemplary embodiment, the distance function is single
Adjust and be incremented by or monotonic decreasing function.Identical derived function is had according to distance function and function of voltage, distance and voltage is obtained
One-to-one mapping relations between signal.
By reading the distance function for the various speed of correspondence being stored in memory, according between distance and voltage signal
Mapping relations, obtain the distance function of corresponding voltage signal, and by the distance function obtain correspondence Moving Objects distance and
Speed.
In a specific embodiment, signal processing circuit includes programmable amplifier, zero adjustment circuit, modulus and turned
Parallel operation, digital signal processor, memory, microprocessor.
Zero adjustment circuit, the input reference voltage for adjusting programmable amplifier obtains the zero of programmable amplifier
Point reference voltage.
In a specific exemplary embodiment, the zero reference voltage is equal to the Static Electro that geomagnetic sensor is obtained
Pressure, quiescent voltage correspondence is entering the fashionable geomagnetic field intensity sensed by geomagnetic sensor without Moving Objects.
Programmable amplifier, the dynamic range for receiving input signal according to analog-digital converter, adjustment and amplification voltage
Signal.
In a specific exemplary embodiment, programmable amplifier is used to compare the earth's magnetic field change of geomagnetic sensor sensing
Change the voltage signal and zero reference voltage obtained, to determine that Moving Objects enter the affiliated service range of geomagnetic sensor.
Analog-digital converter, samples to the voltage signal of simulation for the sample rate according to pre-selection setting, is converted to pair
The digitized voltage signal answered.
Digital signal processor, for by being filtered to digitized voltage signal, to improve the signal to noise ratio of voltage signal.
Memory, the distance function for storing the various speed of correspondence.
Microprocessor, for the distance function by reading the various speed of correspondence being stored in memory, according to distance
Mapping relations between voltage signal, obtain the distance function of corresponding voltage signal, and obtained to meeting the tendency of by the distance function
The distance and speed of dynamic object.
Correspondence identical variation rate of magnetic flux, bigger induced electricity can be obtained by the number of coils for increasing induction coil
Kinetic potential.I.e. can be by way of increasing induction coil quantity so that geomagnetic sensor can sense when more small magnetic flux
Quantitative change rate, so as to improve the distance of geomagnetic sensor sensing.The voltage signal that signal processing circuit is obtained to geomagnetic sensor
It is amplified and analog-to-digital conversion process, and the digitized voltage signal of acquisition is filtered, improves the signal to noise ratio of voltage signal, enter
One step increases the sensing distance of geomagnetic sensor.
In one exemplary embodiment, before execution step 150, also including step：The fortune that storage is obtained by measurement
The distance and speed of dynamic object monitoring, distance correspondence is sensed by geomagnetic sensor to be obtained with the moving object that speed is moved
Voltage signal.
Specifically, being moved by measuring Moving Objects with the speed set in the service range of geomagnetic sensor, obtain
The Moving Objects and geomagnetic sensor apart from versus time curve, by this apart from versus time curve not
Same point in time sampling, obtains the distance function using the time as independent variable.Received corresponding to vehicle close to or far away from highway
Take application scenarios during station, distance function is monotonic increase or monotonic decreasing function.Pass through the storage in signal processing circuit
The distance function of the various speed of device storage correspondence.
Fig. 2 is a kind of schematic diagram of the monitoring method of Moving Objects shown in another exemplary embodiment.As shown in Fig. 2
This method comprises the following steps：
In a step 101, being sensed by magnetoresistive transducer does not have Moving Objects to exist and corresponding earth magnetism in service range
Field intensity, obtains the quiescent voltage signal of correspondence geomagnetic field intensity.
In order to realize that geomagnetic sensor is sensed to Moving Objects, it is necessary to obtain not having when in the service range of geomagnetic sensor
Moving Objects enter fashionable, the geomagnetic field intensity sensed by magnetoresistive transducer in geomagnetic sensor, obtain correspondence absolute force
Quiescent voltage.The quiescent voltage is used for the zero point according to pga circuit in the quiescent voltage setting signal process circuit
Reference voltage.
In step 103, inputted by quiescent voltage signal into signal processing circuit, and Regulate signal process circuit
Zero adjustment circuit, obtains the zero reference voltage of the pga circuit in signal processing circuit.
Inputted by quiescent voltage signal to signal processing circuit, it is defeated using quiescent voltage as pga circuit one
Enter end, another input using the output voltage of zero adjustment circuit as pga circuit.Adjusted by adjusting zero point
The output voltage on economize on electricity road, the output voltage of zero adjustment circuit is made during using the output voltage of pga circuit as zero level
For the zero reference voltage of pga circuit.
Fig. 3 is that Fig. 1 correspondingly implements one kind of step 110 in the monitoring method of Moving Objects that exemplifies and implements flow
Figure.
In step 111, the magnetic flux change produced by earth's magnetic field changes in distribution, acquisition pair are sensed by geomagnetic sensor
Answer the voltage signal of variation rate of magnetic flux.
The earth's magnetic field changes in distribution produced as Moving Objects enter the service range of geomagnetic sensor, is passed by earth magnetism
The magnetic flux change that sensor sensing is produced by earth's magnetic field changes in distribution, obtains the voltage signal of correspondence variation rate of magnetic flux.
Specifically, the service range entered with Moving Objects, causes geomagnetic field intensity to decline, i.e. geomagnetic field intensity falls
Fall.The decline of the geomagnetic field intensity causes to change by the magnetic flux of geomagnetic sensor, and geomagnetic sensor is by sensing magnetic
Variations of flux rate, obtain to should variation rate of magnetic flux voltage signal.
In step 113, by the way that voltage signal and input reference voltage are inputted to pga circuit, acquisition can be compiled
The output voltage of journey amplifying circuit.
Programmable Gain Amplifier Circuit is used for the dynamic range that input signal is received according to analog-digital converter, adjustment voltage letter
Number magnitude of voltage.Because the voltage signal that geomagnetic sensor is exported to signal processing circuit is a less analog voltage letter
Number, it is necessary to by the way that the voltage signal is adjusted and amplified, it is set to meet the dynamic model of input signal that number converter is received
Enclose.
In a specific embodiment, the dynamic range that analog-digital converter receives input signal is 20mV to 3.3V.It is logical
The magnetic flux change crossed geomagnetic sensor sensing earth's magnetic field changes in distribution and produced, the voltage of the corresponding variation rate of magnetic flux of acquisition
Signal is 20mV.It is 20mV because geomagnetic sensor is exported to the voltage signal of signal processing circuit, the voltage signal is not in mould
Number converter is received within the dynamic range of input signal.The output that the voltage signal is obtained by the amplification of programmable amplifier
Voltage is 400mV, and the output voltage is within the dynamic range in analog-digital converter.
In step 115, threshold value set in advance is continued above within the time of setting according to output voltage, it is determined that motion
Object enters the affiliated service range of the geomagnetic sensor.
Earth's magnetic field changes in distribution is produced as Moving Objects enter the service range of geomagnetic sensor, is sensed by earth magnetism
The magnetic flux change that device sensing is produced by earth's magnetic field changes in distribution, obtains the voltage signal of correspondence variation rate of magnetic flux.It will obtain
The pga circuit that inputs into signal processing circuit of voltage signal, pass through voltage of the pga circuit to input
Signal is amplified and obtains output voltage.Threshold value set in advance is exceeded according to the output voltage, determines that Moving Objects enter
The affiliated service range of geomagnetic sensor.
Specifically, geomagnetic sensor is in fixed position measurement earth's magnetic field, obtained geomagnetic field intensity is close to a perseverance
Definite value.But geomagnetic field intensity is not a constant, and can be changed within the specific limits.Therefore, the programmable amplification of setting is passed through
The threshold value of device and gain, are less than the threshold value according to programmable amplifier output voltage, determine that no Moving Objects are passed into earth magnetism
The affiliated service range of sensor.Threshold value set in advance is exceeded according to the output voltage, it is determined that Moving Objects are sensed into earth magnetism
The affiliated service range of device.
Further,, may due to the factor such as the power supply of geomagnetic sensor is unstable even if the entrance without Moving Objects
Geomagnetic field intensity is caused to change.In running order geomagnetic sensor senses geomagnetic field intensity change and obtains corresponding electricity
Press signal.The programmable amplifier that the voltage signal is inputted into signal processing circuit, may cause pga circuit
Output voltage instantaneously exceed threshold value set in advance.To solve the problem, by presetting at a duration, signal
Manage circuit and exceed threshold value set in advance according to the output voltage of programmable amplifier is lasting within the time of the setting, it is determined that
Moving Objects enter geomagnetic sensor service range.
Fig. 4 is that Fig. 1 correspondingly implements one kind of step 130 in the monitoring method of Moving Objects that exemplifies and implements flow
Figure.
In step 131, pass through the X-axis amplification module of the electromagnetic induction sensor in geomagnetic sensor, Y-axis amplification module
The magnetic flux change on respective axial direction is sensed with Z axis amplification module, respectively magnetic flux in acquisition correspondence X-axis, Y-axis and Z-direction
The voltage signal of rate of change.
The presence but also requirement that electromagnetic induction sensor does not require nothing more than magnetic field have the fortune of Moving Objects cutting magnetic line
It is dynamic, the close phase of movement velocity of voltage signal and sensed Moving Objects that electromagnetic induction sensor sensing Moving Objects are obtained
Close.
Electromagnetic induction sensor includes X-axis amplification module, Y-axis amplification module and Z axis amplification module.Passed by electromagnetic induction
X-axis sensor, Y-axis sensor and Z axis sensor in sensor sense the magnetic flux change on respective axial direction, are corresponded to respectively
The voltage signal of variation rate of magnetic flux in X-axis, Y-axis and Z-direction.
Specifically, electromagnetic induction sensor is made based on microelectromechanical systems technique, including X-axis amplification module, Y-axis are put
Big module and Z axis amplification module.Wherein each amplification module includes the ferromagnetic material in the middle of annular resonance and annular resonance
Material, induction coil is surrounded on annular resonance and is in series with resistance at two ends.Passed through when caused by the changes in distribution of earth's magnetic field
It is through in the magnetic line of force change of annular resonance, the induction coil for being surrounded on annular resonance and produces induced electromotive force.The sensing
Electromotive force with the resistance that induction coil is connected by producing voltage, and electromagnetic induction sensor is sensed by the detection to the voltage
The size of variation rate of magnetic flux.
In step 133, the electromagnetic induction sensor in geomagnetic sensor, electromagnetic induction sensing are gated by gating circuit
Device is set up by gating circuit and signal processing circuit and connected.
Gating circuit, refers to the multiway analog switch made by microelectronic technique, and it can be selected all the way or multichannel
Voltage signal passes through, and can also set all the way or plurality of voltages signal can not pass through.Realize that earth magnetism is sensed by gating circuit
The connection of device and follow-up signal process circuit.
Further, when needing the zero reference voltage of pga circuit in setting signal process circuit, now only
Need to gate the connection of the magnetoresistive transducer and follow-up signal process circuit in geomagnetic sensor.Obtained according to geomagnetic sensor
Quiescent voltage sets the zero reference voltage of pga circuit.When the setting for completing zero reference voltage, then it can lead to
Gating circuit is crossed by the connection of the electromagnetic induction sensor in geomagnetic sensor and follow-up signal process circuit, passes through electromagnetic induction
The motion of Sensor monitoring Moving Objects.
In a specific application scenarios, the network topology being monitored to Moving Objects can be as shown in Figure 5.Wherein
Geomagnetic sensor includes magnetoresistive transducer and electromagnetic induction sensor.Magnetoresistive transducer includes X-axis magnetoresistive transducer, Y-axis magnetic resistance
Sensor and Z axis magnetoresistive transducer.Electromagnetic induction sensor includes X-axis amplification module, Y-axis amplification module and Z axis amplification module.
Magnetoresistive transducer and electromagnetic induction sensor are connected by gating circuit and follow-up signal process circuit.Due to magneto-resistive transducing utensil
There is the very high earth's magnetic field sensing degree of accuracy, sensed by magnetoresistive transducer and enter fashionable geomagnetic field intensity without moving object and obtain
To should geomagnetic field intensity quiescent voltage, inputted by input reference signal of the quiescent voltage to pga circuit,
The zero reference voltage of programmable amplification module is obtained by adjusting zero adjustment circuit.The sense for passing through itself when geomagnetic sensor
Survey and determine that the Moving Objects of monitoring enter geomagnetic sensor service range, the electromagnetism in geomagnetic sensor is gated by gating circuit
Inductive pick-up, the magnetic flux change for being sensed earth's magnetic field changes in distribution by electromagnetic induction sensor and being produced obtains correspondence magnetic flux
The voltage signal of quantitative change rate, voltage signal is inputted to follow-up signal process circuit and handled.
Fig. 6 is a kind of block diagram of the monitoring device of Moving Objects shown in an exemplary embodiment.As shown in fig. 6, the dress
Put including but not limited to：Moving Objects monitoring modular 610, induced voltage acquisition module 630, motion capture module 650.
Moving Objects monitoring modular 610, the sensing for being carried out by geomagnetic sensor itself determines the motion pair of monitoring
As；
Induced voltage acquisition module 630, the magnetic flux change for being produced by earth's magnetic field changes in distribution obtains correspondence magnetic
The voltage signal of variations of flux rate；
Motion capture module 650, for being determined by signal processing circuit comprising electricity indicated by the voltage signal
The mapping relations of pressure, distance and speed that the voltage as indicated by mapping relations obtain the voltage signal maps.
Fig. 7 is a kind of block diagram of the monitoring device of Moving Objects shown in another exemplary embodiment.As shown in fig. 7,
The device includes but is not limited to：Quiescent voltage acquisition module 710, zero-point voltage acquisition module 730.
Quiescent voltage acquisition module 710, for sensing affiliated service range by the magnetoresistive transducer in geomagnetic sensor
It is interior to exist and corresponding geomagnetic field intensity without Moving Objects, obtain the quiescent voltage signal of correspondence geomagnetic field intensity；
Zero-point voltage acquisition module 730, for being inputted by the quiescent voltage signal to the signal processing circuit, and
The zero adjustment circuit in the signal processing circuit is adjusted, the input of the pga circuit in signal processing circuit is obtained
Reference voltage.
Fig. 8 is block diagram of the Moving Objects monitoring modular in one embodiment that embodiment is corresponded to according to Fig. 6.As shown in figure 8,
The device includes but is not limited to：Voltage signal acquiring unit 611, output voltage acquiring unit 613, Moving Objects determining unit
615。
Voltage signal acquiring unit 611, for being produced by geomagnetic sensor sensing by the earth's magnetic field changes in distribution
Raw magnetic flux change, obtains the voltage signal of the correspondence variation rate of magnetic flux；
Output voltage acquiring unit 613, for by the way that the voltage signal and the input reference voltage are inputted to can
Amplifying circuit is programmed, the output voltage signal of the pga circuit is obtained；
Moving Objects determining unit 615, it is pre- for being continued above according to the output voltage signal within the time of setting
The threshold value first set, determines that the Moving Objects enter the affiliated service range of the geomagnetic sensor.
Fig. 9 is block diagram of the voltage signal acquisition module in one embodiment that embodiment is corresponded to according to Fig. 6.As shown in figure 9,
The device includes but is not limited to：Gating unit 631, induced voltage acquiring unit 633.
Gating unit 631, it is described for gating the electromagnetic induction sensor in the geomagnetic sensor by gating circuit
Electromagnetic induction sensor is set up by gating circuit and the signal processing circuit and connected；
Induced voltage acquiring unit 633, for passing through the X-axis amplification module in electromagnetic induction sensor, Y-axis amplification module
The magnetic flux change on respective axial direction is sensed with Z axis amplification module, respectively magnetic flux in acquisition correspondence X-axis, Y-axis and Z-direction
The voltage signal of rate of change.
It should be appreciated that the invention is not limited in the precision architecture for being described above and being shown in the drawings, and
And various modifications and changes can be being performed without departing from the scope.The scope of the present invention is only limited by appended claim.
Claims (10)
1. a kind of monitoring method of Moving Objects, it is characterised in that methods described is used in geomagnetic sensor and signal transacting electricity
Coordinate lower progress Moving Objects monitoring between road, including：
The sensing carried out by the geomagnetic sensor itself determines the Moving Objects of monitoring, the motion of the Moving Objects
Earth's magnetic field changes in distribution will be produced；
The magnetic flux change produced by the earth's magnetic field changes in distribution obtains the voltage signal of correspondence variation rate of magnetic flux, by institute
Voltage signal is stated to input to the signal processing circuit；
The mapping relations for determining to include voltage indicated by the voltage signal by the signal processing circuit, are closed by the mapping
System obtains the distance and speed that voltage indicated by the voltage signal maps.
2. according to the method described in claim 1, it is characterised in that the sensing carried out by the geomagnetic sensor itself
It is determined that before the Moving Objects of monitoring, also including step：
Sensed by magnetoresistive transducer in the geomagnetic sensor there is no Moving Objects to exist in service range and correspondingly
Magnetic field intensity, obtains the quiescent voltage signal of the correspondence geomagnetic field intensity；
Inputted by the quiescent voltage signal to the signal processing circuit, and adjust the zero point in the signal processing circuit
Circuit is adjusted, the zero reference voltage of the pga circuit in the signal processing circuit, the zero reference electricity is obtained
Press the Moving Objects that monitoring is determined for the sensing carried out by the geomagnetic sensor itself.
3. method according to claim 2, it is characterised in that the sensing carried out by the geomagnetic sensor itself
It is determined that the Moving Objects of monitoring, including：
The magnetic flux change produced by the earth's magnetic field changes in distribution is sensed by the geomagnetic sensor, the correspondence magnetic is obtained
The voltage signal of variations of flux rate；
By the way that to pga circuit, the voltage signal and the zero reference control source are obtained into the correspondence voltage
The output voltage of the pga circuit of signal；
Threshold value set in advance is continued above within the time of setting according to the output voltage, determines that the Moving Objects enter
The service range of the geomagnetic sensor.
4. according to the method described in claim 1, it is characterised in that the magnetic flux produced by the earth's magnetic field changes in distribution
Amount change obtains the voltage signal of correspondence variation rate of magnetic flux, including：
Pass through the X-axis amplification module of the electromagnetic induction sensor in geomagnetic sensor, Y-axis amplification module and Z axis amplification module sense
The magnetic flux change surveyed on respective axial direction, obtains the voltage of variation rate of magnetic flux in correspondingly X-axis, Y-axis and Z-direction respectively
Signal；
The electromagnetic induction sensor is set up by gating circuit and the signal processing circuit and connected.
5. according to the method described in claim 1, it is characterised in that described to be determined by the signal processing circuit comprising described
The mapping relations of voltage indicated by voltage signal, and obtain distance and speed that the Moving Objects are monitored by the mapping relations
Before, including：
Distance and speed that the Moving Objects that storage is obtained by measurement are monitored, the distance correspondence pass through geomagnetic sensor
Sense the voltage signal obtained with the Moving Objects that the speed is moved.
6. a kind of monitoring device of Moving Objects, it is characterised in that described device includes：
Moving Objects monitoring modular, the sensing for being carried out by the geomagnetic sensor itself determines the motion pair of monitoring
As；
Induced voltage acquisition module, the magnetic flux change for being produced by the earth's magnetic field changes in distribution obtains correspondence magnetic flux
The voltage signal of rate of change；
Motion capture module, for determining to include voltage indicated by the voltage signal by the signal processing circuit
Mapping relations, distance and speed that the voltage as indicated by the mapping relations obtain the voltage signal maps.
7. monitoring device according to claim 6, it is characterised in that described device also includes：
Quiescent voltage acquisition module, is not transported for being sensed by the magnetoresistive transducer in the geomagnetic sensor in service range
Dynamic object is present and corresponding geomagnetic field intensity, obtains the quiescent voltage signal of the correspondence geomagnetic field intensity；
Zero-point voltage acquisition module, for being inputted by the quiescent voltage signal to the signal processing circuit, and adjusts institute
The zero adjustment circuit in signal processing circuit is stated, the zero point ginseng of the pga circuit in the signal processing circuit is obtained
Examine voltage.
8. monitoring device according to claim 7, it is characterised in that the Moving Objects monitoring modular, including：
Voltage signal acquiring unit, for sensing the magnetic flux produced by the earth's magnetic field changes in distribution by the geomagnetic sensor
Amount change, obtains the voltage signal of the correspondence variation rate of magnetic flux；
Output voltage acquiring unit, for by by the voltage signal and the zero reference control source to programmable amplification
Circuit, obtains the output voltage signal of the pga circuit；
Moving Objects determining unit, it is set in advance for being continued above according to the output voltage signal within the time of setting
Threshold value, determines that the Moving Objects enter the affiliated service range of the geomagnetic sensor.
9. monitoring device according to claim 6, it is characterised in that the voltage signal acquisition module, including electromagnetism sense
Answer unit：
Induced voltage acquiring unit, puts for the X-axis amplification module by the electromagnetic induction sensor in geomagnetic sensor, Y-axis
Big module and Z axis amplification module sense the magnetic flux change on respective axial direction, obtain respectively in correspondence X-axis, Y-axis and Z-direction
The voltage signal of variation rate of magnetic flux；
Gating unit, is set up by gating circuit and the signal processing circuit for the electromagnetic induction sensor and connected.
10. monitoring device according to claim 6, it is characterised in that the monitoring device also includes：
Memory cell, for storing distance and speed that the Moving Objects obtained by measurement are monitored, the distance correspondence
The voltage signal obtained with the moving object that the speed is moved is sensed by geomagnetic sensor.
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Address after: No.11, Jiangxi Road, Shinan District, Qingdao, Shandong 266000 Patentee after: Qingdao Hisense Mobile Communication Technology Co.,Ltd. Address before: 266071 Shandong city of Qingdao province Jiangxi City Road No. 11 Patentee before: HISENSE MOBILE COMMUNICATIONS TECHNOLOGY Co.,Ltd. |