CN106054256B - A kind of detection method of dislocation charge source movement speed and direction - Google Patents
A kind of detection method of dislocation charge source movement speed and direction Download PDFInfo
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- CN106054256B CN106054256B CN201610516790.8A CN201610516790A CN106054256B CN 106054256 B CN106054256 B CN 106054256B CN 201610516790 A CN201610516790 A CN 201610516790A CN 106054256 B CN106054256 B CN 106054256B
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- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
Abstract
A kind of method in contactless tracking detection dislocation charge source disclosed by the invention, belongs to electrostatic detection field.The present invention includes the following steps:The multi-electrode detection array of moving charge source electrostatic signal can be detected by laying;Acquire the electrostatic signal in monitoring of environmental;The collected electrostatic induction signal potential value and preset are compared;Record the amplitude of generated electrostatic induction signal on each pole plate, electrostatic induction voltage signal amplitude is converted into sensor current signal and is integrated, obtain the charge inducing amount of each induction plate, Charge Source position sensing is carried out using about beam-scanning method, obtain the position in dislocation charge source, real time position is handled by Kalman filtering to improve positional precision, and is calculated by adjacent position and obtain target speed and direction.The present invention can carry out real-time detection by 5 pole plates that solid is laid to dislocation charge source movement speed and direction, have the characteristics that good concealment, operand are small, real-time is good and calculate accurate.
Description
Technical field
The present invention relates to a kind of methods in contactless tracking detection dislocation charge source more particularly to one kind can be used for tracking
The Non-contact electrostatic detection method of various Electrostatic Targets, especially human body and human hands movement velocity and direction belongs to quiet
Electric field of detecting.
Background technology
The developing direction applied to human body monitoring technologies in fields such as anti-terrorism scouting, safety monitoring, medical treatment and nursing is at present
It studies with good in anti-interference performance, false alarm rate is low, work blind spot area is small, logical algorithm is simple and system lays convenient new body
Detection Techniques processed.Human body detection technology has extensive important application in anti-terrorism monitoring field, and such as grasping solitary personnel at any time exists
The active state of residential location.Infrared acquisition and image pattern recognition are widely answered in human body detection field at present
With.
Infrared detection technique perceives the presence of human body target using the infrared radiation signal of human body, but since interior is deposited
In the equipment of the transmitting infrared signal such as heating, illumination, while there are the sources of infrared radiation such as illumination in outdoor environment so that the skill
The false alarm rate of art is higher.In addition infrared detection technique can only detect human body target and whether there is, and the appearance of None- identified target
State acts;Image pattern recognition be usually used in identify human body posture action, but the video dead zone of camera without
Method plays a role, and in addition in order to exclude the interference of non-human target, image pattern recognition needs to calculate using complicated logic
Method designs.
Electrostatic detection technology realizes that the detection to target identifies using the electrostatic of object institute band in movement.
“Triboelectrification of houseflies(Musca domestic L.)walking on synthetic
dielectric surfaces”Mcgonigle D F,Jackson C W and Davidson J L
The method that electrostatic detection is carried out to the insect in creeping is put forward for the first time in 2002J.Electrostat.54 167-177.It is opened by this
Hair, " Electrification of human body by walking " Ficker T 2006J.Electrostat.64
10-16 studies the variation of human body potential in movement by the electrometer on human body.Due to all movements
Object can all take electrostatic, therefore it is feasible that electrostatic detection method, which is applied to identification human body, is not connect both at home and abroad by non-
Touch electrostatic detection method is applied to human bioequivalence.
“An adaptive Kalman-based Bayes estimation technique to classify
locomotor activities in young and elderly adults through accelerometers”
R.Muscillo,M. Schmid,S.Conforto and T.D’Alessio,Med.Eng.Phys.32,849-859
(2010)、“Detection of pedestrians in far-infrared automotive night vision
using region-growing and clothing distortion compensation”R.O’Malley,
E.Jonesa,and M.Glavin,Infrared.Phys.Techn.53,439-449(2010)、“Human detection
using a mobile platform and novel features derived from a visual saliency
Lead to respectively in mechanism " S.Montabone, and A.Soto, Image.Vision.Comput.28,391-402 (2010)
It crosses and sensor, infrared detection technique and image pattern recognition realization is installed to human hand motion trajectory in human hands
Tracking.However due to the indoor equipment that there is the transmitting infrared signal such as heating, illumination, while there are illumination etc. in outdoor environment
The source of infrared radiation so that the error rate for being applied to the infrared detection technique of tracking human hand motion trajectory is higher.Image model
Identification technology is usually used in the tracking to human body motion track, but the video dead zone in camera can not play a role, this
Outside in order to exclude the interference of non-human hand target, image pattern recognition is needed using complicated logical algorithm design;It wears
The formula sensor network of wearing can effectively track the movement locus of human hands, but due to needing detector being mounted on human body hand
In portion, there is defects inconvenient to use, while will be impacted to the motion state of human hands.
Invention content
The technical problem to be solved by the present invention is to the movements using Non-contact electrostatic detection method tracking dislocation charge source
Speed and direction (by taking human hands as an example), while solving work blind spot area existing for human hands motion detection technology greatly and visiting
The examining system problem complicated with logical algorithm design.The invention discloses one kind for tracking dislocation charge source real time kinematics speed
With the Non-contact electrostatic detection method in direction, Non-contact electrostatic detection technology can be applied to transport human hands by this method
In dynamic track following, the work blind spot area of human hands tracking measurement technology can be reduced, reduce the detection of human hands motion tracking
The design complexity of system.
A kind of Non-contact electrostatic detection side for tracking dislocation charge source movement speed and direction disclosed by the invention
The goal of the invention of method is to be achieved through the following technical solutions:
A kind of Non-contact electrostatic detection side for tracking dislocation charge source movement speed and direction disclosed by the invention
Steps are as follows for method specific implementation:
Step 1:The multi-electrode detection array of dislocation charge source movement electrostatic signal, the detection battle array can be detected by laying
Row are made of five pole plates, and five pole plates are divided into two groups, and one of which 4 is laid in centered on origin O, 2l is the length of side
On 4 vertex of square, coordinate is respectively S1(l,l,0)、S2(l,-l,0)、 S3(l,l,0)、S4(- l, l, 0), another group 1
It is a, it is laid on Z axis, coordinate is (0,0 ,-h);
Step 2:The electrostatic signal in monitoring of environmental is acquired, the electrostatic signal is that each moment detection system obtains
Electrostatic induction signal voltage value;
Step 3:The collected electrostatic induction signal voltage value and preset comparison (can be set as full scale
5%), if the electrostatic induction signal is identical as the preset, then it is assumed that detect the presence of charge source movement;
Step 4:The charge source movement detected in recording step two generated electrostatic induction signal on each pole plate
Amplitude, electrostatic induction voltage signal amplitude is converted into sensor current signal and is integrated, the induction of each induction plate is obtained
Quantity of electric charge Q1-Q5, carry out Charge Source position sensing using about beam-scanning method, you can obtain the physical location in dislocation charge source.
Step 5:Smooth Charge Source position-order is obtained into line trace to Charge Source movement locus using Kalman filtering
Then row use following formula to obtain Charge Source movement velocity and direction:
Charge Source movement velocity:
The Charge Source direction of motion is with x-axis angle theta:
The Charge Source direction of motion is with y-axis angle β:
The Charge Source direction of motion is with z-axis angle γ:
T is the time difference between charge source position measurement twice in above-mentioned formula, when coordinate value subscript T (n) indicates current
The coordinate value at quarter, coordinate value subscript T (n-1) indicate the coordinate value of previous moment.
About beam-scanning method described in step 4 is:
The charge inducing amount of each pole plate is compared, source quantities of charge is eliminated, it can be deduced that:
From the above equation, we can see that withFor the centre of sphere, withIt is all on the spherical surface of radius
Point T meets formulaWith pointFor the centre of sphere, withFor the spherical surface of radius
On all the points T all meetWith pointFor the centre of sphere, withFor radius
All the points T on spherical surface meetsIt can be mutually sent on a circle by three spherical surfaces of the centre of sphere of A, B, C.I.e.
Point T can be further carried out round constraint, i.e., be a radius by Charge Source position constraint be r0, the center of circle is the circle of W.Due to the center of circle
W is on straight line AB, then center of circle W is on XOY plane, can set W coordinate as (x0, y0, 0).x0、y0And r0Occurrence can be by AB
Point coordinates, r1And r2It is provided by triangle geometry relationship.
It analyzes, Charge Source can be tied on a circle by two spherical surfaces of the centre of sphere of A, B, but be from mathematical angle
It,, can in order to improve circle constraint precision since there are the positions of systematic error, the centre of sphere A, B might have deviation in system actual use
Round constraint is further carried out by tri- point coordinates fitting a straight line of A, B, C.
Pass through A, 3 fitting a straight lines of B, C:
Y=ax+b
According to A, 3 positions B, C and r1,r2,r3It is r that can determine that T points are located at a radius0, center of circle W is [x0,
y0, 0] circle on, plane where the vertical circle of straight line shown in y=ax+b simultaneously crosses center of circle W.
With polar coordinate representation Charge Source T θ values are scanned if TW lines and plane XOY angles are θ so that T points are along circular motion
When, if 0≤θ <, 2 π (, TW is projected as straight line y=a on plane XOY1x+b1,A is formula y=ax+b cathetus
Slope, then T points (x, y, z) coordinate be converted to polar coordinates and be:
According to a fixed step size in (0,2 π) range scans θ so that:
Wherein (x1,y1,z1), (x5,y5,z5) be pole plate 1 and pole plate 5 position, (x in the present system1,y1,z1) be (-
L ,-l, 0), (x5,y5,z5) it is (0,0, h).
θ values at this time are set as θ0, then charge source position can be given by:
Advantageous effect:
1, a kind of dislocation charge source real time position detection method of the invention can be by 5 pole plates that solid is laid to moving
Dynamic charge source position carries out real-time detection, can be applicable to the real-time of airbound target, vehicle target, human body target and human hands
Position sensing.
2, a kind of dislocation charge source real time position detection method of the invention, due to being utilized, electrostatic induction signal is more difficult to disappear
Except the characteristics of, can be passive position sensing is carried out to dislocation charge source target, have the characteristics that good concealment.
3, a kind of dislocation charge source real time position detection method of the invention by about beam-scanning method to charge source position into
Row detection, has operand small, and real-time is good, and position calculates accurate feature.
Description of the drawings
Fig. 1 is probe unit layout diagram;
Fig. 2 is the circle constraint schematic diagram about in beam-scanning method;
Fig. 3 is the scanning schematic diagram about in beam-scanning method.
Specific implementation mode
Detailed description of the present invention specific implementation mode below in conjunction with the accompanying drawings.
Embodiment:
Step 1:The multi-electrode detection array of dislocation charge source movement electrostatic signal, the detection battle array can be detected by laying
Row five pole plates as being made of shown in attached drawing 1, and five pole plates are divided into two groups, one of which 4, in being laid in and being with origin O
The heart, 2l are on 4 vertex of square of the length of side, and coordinate is respectively S1(l,l,0)、 S2(l,-l,0)、S3(l,l,0)、S4(-
L, l, 0), it another group 1, is laid on Z axis, coordinate is (0,0 ,-h);
Step 2:The electrostatic signal in monitoring of environmental is acquired, the electrostatic signal is that each moment detection system obtains
Electrostatic induction signal voltage value;
Step 3:The collected electrostatic induction signal voltage value and preset comparison (can be set as full scale
5%), if the electrostatic induction signal is identical as the preset, then it is assumed that detect the presence in moving charge source;
Step 4:The charge source movement detected in recording step two generated electrostatic induction signal on each pole plate
Amplitude, electrostatic induction voltage signal amplitude is converted into sensor current signal and is integrated, the induction of each induction plate is obtained
Quantity of electric charge Q1-Q5, carry out Charge Source position sensing using about beam-scanning method, you can obtain the physical location in dislocation charge source.
Step 5:Smooth Charge Source position-order is obtained into line trace to Charge Source movement locus using Kalman filtering
Then row use following formula to obtain Charge Source movement velocity and direction:
Charge Source movement velocity:
The Charge Source direction of motion is with x-axis angle theta:
The Charge Source direction of motion is with y-axis angle β:
The Charge Source direction of motion is with z-axis angle γ:
T is the time difference between charge source position measurement twice in above-mentioned formula, when coordinate value subscript T (n) indicates current
The coordinate value at quarter, coordinate value subscript T (n-1) indicate the coordinate value of previous moment.
About beam-scanning method described in step 4 is:
The charge inducing amount of each pole plate is compared, source quantities of charge is eliminated, it can be deduced that:
From the above equation, we can see that withFor the centre of sphere, withIt is all on the spherical surface of radius
Point T meets formulaWith pointFor the centre of sphere, withFor the spherical surface of radius
On all the points T all meetWith pointFor the centre of sphere, withFor radius
All the points T on spherical surface meetsIt can be mutually sent on a circle by three spherical surfaces of the centre of sphere of A, B, C.I.e.
Point T can be further carried out round constraint, i.e., be a radius by Charge Source position constraint be r0, the center of circle is the circle of W.Due to the center of circle
W is on straight line AB, then center of circle W is on XOY plane, can set W coordinate as (x0, y0, 0).x0、y0And r0Occurrence can be by AB
Point coordinates, r1And r2It is provided by triangle geometry relationship shown in attached drawing 2.
It analyzes, Charge Source can be tied on a circle by two spherical surfaces of the centre of sphere of A, B, but be from mathematical angle
It,, can in order to improve circle constraint precision since there are the positions of systematic error, the centre of sphere A, B might have deviation in system actual use
Round constraint is further carried out by tri- point coordinates fitting a straight line of A, B, C.
Pass through A, 3 fitting a straight lines of B, C:
Y=ax+b
According to A, 3 positions B, C and r1,r2,r3It is r that can determine that T points are located at a radius0, center of circle W is [x0,
y0, 0] circle on, plane where the vertical circle of straight line shown in y=ax+b simultaneously crosses center of circle W.
According to polar coordinate representation Charge Source T is used shown in attached drawing 3, if TW lines and plane XOY angles are θ, θ values is scanned, are made
When obtaining T points along circular motion, if 0≤θ <, 2 π (, TW is projected as straight line y=a on plane XOY1x+b1,A is formula y
=ax+b cathetus slopes, then T points (x, y, z) coordinate be converted to polar coordinates and be:
According to a fixed step size in (0,2 π) range scans θ so that:
Wherein (x1,y1,z1), (x5,y5,z5) be pole plate 1 and pole plate 5 position, (x in the present system1,y1,z1) be (-
L ,-l, 0), (x5,y5,z5) it is (0,0, h).
θ values at this time are set as θ0, then charge source position can be given by:
The scope of the present invention is not only limited to above-described embodiment, and above-described embodiment is for explaining the present invention, all and this hair
Bright change or modification under the conditions of same principle and design is within protection domain disclosed by the invention.
Claims (2)
1. a kind of for tracking dislocation charge source movement speed and the Non-contact electrostatic detection method in direction, which is characterized in that
Include the following steps:
Step 1:The multi-electrode detection array of dislocation charge source movement electrostatic signal can be detected by laying, the detection array by
Five pole plates composition, five pole plates are divided into two groups, one of which 4, be laid in centered on origin O, 2l for the length of side pros
On 4 vertex of shape, coordinate is respectively S1(-l,-l,0)、S2(l,-l,0)、S3(l,l,0)、S4(- l, l, 0), another group 1,
It is laid on Z axis, coordinate is (0,0 ,-h);
Step 2:The electrostatic signal in monitoring of environmental is acquired, the electrostatic signal is the quiet of each moment detection system acquisition
Electric induction signal voltage value;
Step 3:Collected electrostatic induction signal voltage value and preset are compared, criterion is set as the 5% of full scale, such as
The fruit electrostatic induction signal voltage value is identical as the preset, then it is assumed that detects the presence of charge source movement;
Step 4:The width of the charge source movement detected in recording step two generated electrostatic induction signal on each pole plate
Value, is converted to sensor current signal by electrostatic induction voltage signal amplitude and integrates, obtain the charge inducing of each induction plate
Measure Q1-Q5, Charge Source position sensing is carried out to get to the physical location in dislocation charge source using about beam-scanning method;
Step 5:Smooth Charge Source position sequence is obtained, so into line trace to Charge Source movement locus using Kalman filtering
Following formula is used to obtain Charge Source movement velocity and direction afterwards:
Charge Source movement velocity:
The Charge Source direction of motion and x-axis angleFor:
The Charge Source direction of motion is with y-axis angle β:
The Charge Source direction of motion is with z-axis angle γ:
T is the time difference between charge source position measurement twice in above-mentioned formula, and coordinate value subscript T (n) indicates current time
Coordinate value, coordinate value subscript T (n-1) indicate the coordinate value of previous moment.
2. a kind of contactless electrostatic for tracking dislocation charge source movement speed and direction according to claim 1 is visited
Survey method, it is characterised in that:
About beam-scanning method described in step 4 is:
The charge inducing amount of each pole plate is compared, source quantities of charge is eliminated, it can be deduced that:
From the above equation, we can see that withFor the centre of sphere, withAll for all the points T on the spherical surface of radius
Meet formulaWith pointFor the centre of sphere, withFor the institute on the spherical surface of radius
There is point T all to meetWith pointFor the centre of sphere, withFor on the spherical surface of radius
All the points T all meetCan be mutually sent on a circle by three spherical surfaces of the centre of sphere of A, B, C, i.e., point T into
One step carries out round constraint, i.e., be a radius by Charge Source position constraint is r0, the center of circle is the circle of W;Since center of circle W is in straight line
On AB, then center of circle W is on XOY plane, if W coordinate is (x0, y0, 0);x0、y0And r0Occurrence by AB point coordinates, r1And r2
It is provided by triangle geometry relationship;
It analyzes from mathematical angle, Charge Source is tied on a circle using A, B as two spherical surfaces of the centre of sphere, but make system is practical
In, since there are the positions of systematic error, the centre of sphere A, B might have deviation, in order to improve circle constraint precision, further pass through
A, tri- point coordinates fitting a straight line of B, C carries out round constraint;
Pass through A, 3 fitting a straight lines of B, C:
Y=ax+b
According to A, 3 positions B, C and r1,r2,r3It is r to determine that T points are located at a radius0, center of circle W is [x0,y0, 0] circle
On, plane where the vertical circle of straight line shown in y=ax+b simultaneously crosses center of circle W, and a is straight slope, and b is the intercept in straight line formula;
θ values are scanned if TW lines and plane XOY angles are θ so that T points are transported along circle with polar coordinate representation Charge Source point T
When dynamic, if 0≤θ < 2 π, TW are projected as straight line y=a on plane XOY1x+b1,A is formula y=ax+b cathetus
Slope, b1For straight line y=a1x+b1Oblique distance, then T points (x, y, z) coordinate be converted to polar coordinates and be:
According to a fixed step size in (0,2 π) range scans θ so that:
Wherein (x1,y1,z1), (x5,y5,z5) be pole plate 1 and pole plate 5 position, (x1,y1,z1) it is (- l ,-l, 0), (x5,y5,
z5) it is (0,0, h);
θ values at this time are set as θ0, then charge source position can be given by:
From the above equation, we can see that the position of Charge Source at this time.
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CN106125146B (en) * | 2016-07-04 | 2018-09-04 | 北京理工大学 | A kind of dislocation charge source real time position detection method |
CN107329005A (en) * | 2016-12-02 | 2017-11-07 | 北京理工大学 | A kind of the orientation detection device and its detection method of the mobile electrical body based on electret effect |
CN111580640B (en) * | 2019-02-18 | 2023-12-22 | 张丽敏 | Two-direction gesture tracking device and method based on charge induction |
CN112415607A (en) * | 2019-08-23 | 2021-02-26 | 南京大学 | Electric field detection method for space debris |
CN112698409B (en) * | 2019-10-22 | 2024-01-30 | 张丽敏 | Indoor moving target positioning and tracking method |
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