CN108387815A - A kind of test method using special wall line analyzer - Google Patents
A kind of test method using special wall line analyzer Download PDFInfo
- Publication number
- CN108387815A CN108387815A CN201810034539.7A CN201810034539A CN108387815A CN 108387815 A CN108387815 A CN 108387815A CN 201810034539 A CN201810034539 A CN 201810034539A CN 108387815 A CN108387815 A CN 108387815A
- Authority
- CN
- China
- Prior art keywords
- signal
- circuit
- wall
- adc
- occurs
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/083—Locating faults in cables, transmission lines, or networks according to type of conductors in cables, e.g. underground
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/088—Aspects of digital computing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/58—Testing of lines, cables or conductors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
A kind of test method using special wall line analyzer of the invention belongs to electronic technology and cable maintenance field, is related to a kind of test method using special wall line analyzer.This method is tested using special wall line analyzer, by carrying out analog signal analysis and Digital Signal Analysis double analysis to the electromagnetic wave of external radiation to wall circuit, pass through the intuitive displays line position of LCD screen, digital display electromagnetic intensity can carry out place on line detection and analysis to " can be fully powered-off " and " can not be fully powered-off " two kinds of wall circuits.It is tested using special wall line analyzer, not only intuitive on the screen can accurately show the trend of circuit and position in wall, the breakpoint etc. of cable can also be measured to a certain extent；Testing result is intuitive and reliable, precision is high, easily operated and adapt to different measuring environments.The heating wire snap point etc. of electric blanket can also be detected, level of integrated system is high, using easy to carry.
Description
Technical field
The invention belongs to electronic technology and cable maintenance field, are related to a kind of test using special wall line analyzer
Method.
Background technology
Wall line analyzer is a kind of instrument for avoiding circuit in wall in fitment process exclusively for decoration company, is led to
Often, when people spruce up, it need to often avoid power cord within the walls and carry out the operation such as punching, in the case where not destroying wall, dress
It is difficult to learn which position circuit is located in wall to repair worker often.
" cable breakage fault finder " patent of invention that Zhou Yun applied in 2013, the patent No. 201310370801.2,
It is proposed that a kind of cheap, practical, testing result is reliable, easy to universal cable breakage fault finder.Cable disconnection fault
Finder can be used for electric blanket heating wire and fracture the searching of not heating accident point, it can also be used to find building lighting circuit cloth
The specific location of line.It is a kind of tool that tracks that can quick and precisely find out breakpoint fault position.But cable disconnection fault is sought
The intensity of the light that mark device is sent out by the intensity and light emitting diode of sound judges at a distance from circuit, easy to produce it is subjective accidentally
Difference, precision is very low, and needs to give staff training and practice.
Invention content
The problem to be solved in the present invention is overcome the deficiencies in the prior art, and existing wall line analyzer is mainly used in the market
Circuit in wall is avoided in fitment process in decoration company, traditional wall circuit analysis equipment is produced by listening by wall electromagnetic wave
The sound of raw interference signal judges place on line, will produce sizable subjective error.In order to make up and overcome these
Problem invents a kind of special wall line analyzer, all kinds of cable fault measuring techniques and wall circuit is absorbed in summary
It is developed on the basis of detection technique.By carrying out analog signal analysis and number to the electromagnetic wave of external radiation to wall circuit
Signal analyzes double analysis, passes through the intuitive displays line position of LCD screen, digital display electromagnetic intensity.Utilize the instrument
Being tested not only intuitively accurate on the screen can show the trend of circuit and position in wall, can also be in certain journey
The breakpoint etc. of cable is measured on degree；Precision is high, testing result is intuitive and reliable, easily operated and adapt to different measuring environments.
The technical solution adopted by the present invention is a kind of test method using wall line analyzer, characterized in that the party
Method is tested using special wall line analyzer, by carrying out analog signal to the electromagnetic wave of external radiation to wall circuit
Analysis and Digital Signal Analysis double analysis, by the intuitive displays line position of LCD screen, digital display electromagnetic intensity,
Place on line detection and analysis can be carried out to " can be fully powered-off " and " can not be fully powered-off " two kinds of wall circuits；Method it is specific
Steps are as follows：
The first step：The making of special wall line analyzer
Special wall line analyzer occurs junction portion by host machine part and signal and forms；
Host machine part is led to by box body 11, left and right handrail 6,8, four electromagnetic sensors, display screen 7, power interface 9, USB
Communication interface 10 and wall line analyzer motherboard are constituted；First, second, is installed respectively at four angles of box body 11 first
Three, the 4th electromagnetism passes device device 1,2,3,4, and four electromagnetic sensors should be arranged on same plane when installing, four electromagnetic sensings
Device is made of copper-clad plate, is connected on master control borad using coaxial cable inner core, and the gauze screen of coaxial cable is connected to the ground of circuit
On line；Left and right handrail 6,8 is respectively symmetrically fixedly installed on the upper surface of box body 11, then display screen 7 is installed to box body 11
Upper surface middle cavity on, power interface 9 and USB communication interfaces 10 are respectively installed to the side of box body 11；Wall circuit point
Analyzer motherboard is made of singlechip minimum system circuit, power circuit, Acquisition Circuit, shaping circuit, LCD display circuit, is used
One pcb board is made；It carries out rationally covering copper when PCB design, simulation ground and digitally isolation and other related anti-tampering designs；
Signal occurs in junction portion, and 250Hz square wave signal generator circuits are independently mounted at signal and occur in connector 5,
The top that connector 5 is mounted on box body 11 occurs for signal, and the side that connector 5 occurs for signal is equipped with three-wire type alternating current male connector, according to
The concrete condition of test can also be removed；
Second step：Motherboard circuits are debugged
Motherboard circuits are debugged first since power circuit；Remove the chip on microcontroller socket；Power on, general-purpose
Whether the voltage that table measures each voltage network is normal, then checks if you have questions power circuit；
Signal acquisition circuit and signal transformation circuit are debugged respectively using oscillograph, and signal occurs can when junction circuit is debugged
To be connected on an empty insert row, host power supply is then opened, is surveyed using oscillograph when first sensor is close to insert row
The signal waveforms of INFO1 over the ground are measured, as can detecting the sine wave of 250Hz or so, then can be considered that signal occurs union line and connects
Connect no problem；
Third walks：Write programmed algorithm
Collected signal strength, and calculating simulation curve are calculated according to the collected signal strength values of four sensors
Position；For square wave, data conversion is carried out using the ADC that microcontroller carries；It is that letter is carried out by peak-to-peak value for sine wave
Number Strength co-mputation, the signal strength carried out in a cycle continuously measure,
If collected ADC numerical value, if it is greater than preceding value, value before covering is similar to：
unsigned int info_adc_get()
{unsigned int adc,i；
For (i=0；i<10；i++)
{if(adc_get()>Adc) adc=adc_get ()；delay(time)；}
return adc；Adc=0；}
Wherein, the value of time is the ratio of cycle length and acquisition density, acquires 5 groups of data with the method, removes maximum
Then value and minimum value carry out average calculating, remove collected random error value；Complementary filter is carried out to 5 groups of data,
I.e.：Info1_adc2=info1_adc1*0.8+info1_adc2*0.2
Wherein, info1_adc2 indicates the 2nd group of data of the 1st sensor；
Thus rotation measures the intensity data of 4 sensors, then carries out simulation curve calculating；Due to signal strength and biography
The distance of sensor and electric wire is inversely proportional, so simulation curve computational algorithm can be simplified to following problem：
Known 4 sensors As 1, A2, A3, the coordinates of A4 central points are respectively (0,0), (0, a), (b, a), (b, 0), not
Know that curve crosses wherein maximum of points, and is inversely proportional with the minimum range of 4 points and 4 point values；Seek curve of approximation expression formula；
Since whether we can not accurately learn it by one of sensor, then it can first assume that it passes through signal most
Strong sensor；Assuming that this sensor is A1；Analysis can be drawn a conclusion：
When A1 values are maximum, A2 values are minimum, then it necessarily passes through A3, between A4 two sensors；
When A1 values are maximum, A3 values are minimum, then it necessarily passes through A1, between A4 two sensors；
When A1 values are maximum, A4 values are minimum, then it necessarily passes through A2, between A3 two sensors；
To pass through A2, for A3：
First find out the point (x that the satisfaction distance between A2, A3 is equal to intensity inverse ratio1,y1), have
x1×A2=(b-x1)×A3
Point (the x that the satisfaction distance between A2 and A4 is equal to intensity inverse ratio is found out again2,y2), have
(x2 2+(a-y2)2)A2 2=((b-x2)2+y2 2)×A4 2
ax2+by2=ab
(x is found out respectively1,y1), (x2,y2), then it is (0,0) to cross point A1 coordinates by conic section, then can set curve as y=α
x2+ β x, curve can be found out by bringing at 2 points；When other points are maximum value, computational methods are similar.
This curve is shown on our LCD display 7 by trace-point method, other is mixed and checks circuit, just realize
Function；
The flow of program：Hardware initialization is carried out first, and then whether detection sensor has connected, and is reported if not connected
Mistake judges that signal occurs whether connector is connected on host if having connected, 50Hz signal detections is entered if having connected
Pattern enters 250Hz signal detection modes if not connected；Microcontroller judges whether it is that 50Hz or 250Hz believes by PCA
Number, if it is not, then returning to whether detection sensor has connected, if it is, acquisition intensity, calculating simulation curve are simultaneously shown.
It returns to again whether detection sensor connects after completing display, carries out next round detection and simulation.
4th step：Wall is tested
Wall test is divided to circuit in wall fully powered-off can not can be carried out with fully powered-off two kinds of situations with circuit in wall；
1) it is directed to the measurement method of wall circuit that can not be fully powered-off
It then keeps signal that plug occurs first to be connected on host；Booting, waiting system self-test, errors excepted prompt please by
It is checked according to the content；It checks whether operating mode is 50Hz on screen, if it is carries out in next step, if it is not,
It please check that signal occurs whether connector is plugged；Far from test line, such as at this time without any display, then instrument be operated in interference compared with
In small environment, it can be used normally；Close to wall, measure, center Screen will appear the approximation of circuit in wall at this time
Position, quadrangle can show that each sensor corresponds to signal strength values；It can show that approximation of the circuit on the inside of wall is deep below screen
Degree；Power supply is closed after measurement.
2) it is directed to the measurement method of wall circuit that can be fully powered-off；
The power supply for then disconnecting test line first pulls up signal and plug occurs, is connected to any one of test line
On socket, plug switch occurs for opening signal；Booting, waiting system self-test, errors excepted prompt are please carried out according to the content
It checks；It checks whether operating mode is 250Hz on screen, if it is carries out in next step, if it is not, signal please be check
Whether connector is plugged；Far from test line, such as at this time without any display, then instrument, which is operated in, interferes in smaller environment, can
With normal use；Close to wall, measure, center Screen will appear the apparent position of circuit in wall at this time, and quadrangle can be shown
Show that each sensor corresponds to signal strength values, approximate depth of the circuit on the inside of wall can be shown below screen；After measurement
Close power supply.
The beneficial effects of the invention are as follows overcome traditional wall circuit analysis equipment to judge place on line by hearing
The subjective error of generation, special wall line analyzer to the electromagnetic wave of external radiation to wall circuit by carrying out analog signal point
Analysis and Digital Signal Analysis double analysis, pass through the intuitive displays line position of LCD screen, digital display electromagnetic intensity.Profit
With the instrument tested not only can the trend of circuit and position in intuitive accurately display wall on the screen, can also be
The breakpoint etc. of cable is measured to a certain extent；Testing result is intuitive and reliable, precision is high, easily operated and adapt to different measurement rings
Border.The heating wire snap point etc. of electric blanket can also be detected, level of integrated system is high, using easy to carry.This method adapts to different
The bis- detection patterns of 50Hz and 250Hz of line environment occur connector switch mode using plug signal, prevent maloperation.
Description of the drawings
The subjective figure of Fig. 1-wall line analyzer, the side view of Fig. 2-wall line analyzer, wherein the first electromagnetism of 1-
Connector occurs for sensor, the second electromagnetic sensors of 2-, 3 third electromagnetic sensors, the 4th electromagnetic sensors of 4-, 5- signals, and 6- is left
Handrail, 7- display screens, 8- right handrails, 9- power interfaces, 10-USB communication interfaces, 11- box bodys.
Fig. 3-signal generation junction circuit figure, Fig. 4-Acquisition Circuit figure, Fig. 5-signal transformation circuit figure,
Fig. 6-program flow diagram.
Specific implementation mode
Below according to attached drawing and the technical solution specific implementation that the present invention will be described in detail.
Fig. 1, Fig. 2 are special wall line analyzer appearance assumption diagrams, and electromagnetic sensor usesCopper-clad plate makes,
The battery that connector occurs for signal builds up battery using 9V.Host machine part and signal are occurred junction portion battery and are all connect using DC-05
The 9V regulated power supplies of head charge.
The first step：The making of special wall line analyzer
Special wall line analyzer occurs junction portion by host machine part and signal and forms；
Host machine part installs first, second at four angles of box body 11 respectively by installation shown in Fig. 1 and Fig. 2, first, the
Three, the 4th electromagnetism passes device device 1,2,3,4, and electromagnetic sensor should be arranged on same plane when installing, four electromagnetic sensors by
Copper-clad plate is made, and is connected on master control borad using coaxial cable inner core, and the gauze screen of coaxial cable is connected on the ground wire of circuit；
Left and right handrail 6,8 is respectively symmetrically fixedly installed on the upper surface of box body 11, then display screen 7 is installed to the upper of box body 11
On the middle cavity of surface, power interface 9 and USB communication interfaces 10 are respectively installed to the side of box body 11；Wall line analyzer
Motherboard is by singlechip minimum system circuit, and power circuit, Acquisition Circuit, shaping circuit, LCD display circuit is constituted, with one
Pcb board is made；It carries out rationally covering copper when PCB design, simulation ground and digitally isolation and other related anti-tampering designs；
Signal occurs in junction portion, and 250Hz square wave signal generators circuit is as shown in figure 3, signal generator circuit is only
The vertical signal that is mounted on occurs in connector 5, and the top that connector 5 is mounted on box body 11 occurs for signal, and the side peace of connector 5 occurs for signal
Equipped with three-wire type alternating current male connector, can also be removed according to the concrete condition of test.
Second step：Motherboard circuits are debugged
Motherboard circuits are debugged first since power circuit；Remove the chip on microcontroller socket；Power on, general-purpose
Whether the voltage that table measures each voltage network is normal, then checks if you have questions power circuit；
Fig. 4 is Acquisition Circuit figure, carries out the debugging of signal acquisition circuit, using oscilloscope measurement close to the conducting wire with alternating current
The signal waveforms of INFO1 to INFO4 over the ground when with far from conducting wire with alternating current.If, there is significant change in close and while leaving, depending on
For Acquisition Circuit no problem, the inspection of line is otherwise carried out；
Fig. 5 is signal transformation circuit figure, signal transformation circuit GET1-4 when using oscilloscope measurement contact close to circuit
Whether signal waveform is square wave, if it is square wave, can be considered signal shaping part no problem, otherwise carries out the inspection of line；Letter
Number occur junction circuit debugging when can be connected on an empty insert row, then open host power supply, upper left sensor
Signal waveform when close to insert row using oscilloscope measurement INFO1 over the ground then may be used as can detecting the sine wave of 250Hz or so
It is considered as signal and union line connection no problem occurs；Wherein, acquisition several times may be used for the acquisition of the amplitude of waveform to take
The method of maximum value obtains the peak value of waveform, and carry out numerical filtering using complementary filter algorithm ensures numerical value with debug numerical value
Variation it is smooth.
If power circuit, all there is no problem for signal acquisition circuit and signal transformation circuit, then can carry out signal
The debugging of junction circuit is simultaneously inserted into microcontroller progress programming.
Third walks：Programmed algorithm with write
Collected signal strength, and calculating simulation curve are calculated according to the collected signal strength values of four sensors
Position；For square wave, data conversion is carried out using the ADC that microcontroller carries；It is that signal is carried out by peak value for sine wave
Strength co-mputation.
For intensity collection function, the signal strength carried out first in a cycle continuously measures, for measuring 50Hz moulds
Formula, a cycle 20ms；For measuring 250Hz patterns, a cycle 4ms, collected ADC numerical value is if it is greater than preceding
Value, then value before covering, is similar to：
unsigned int info_adc_get()
{unsigned int adc,i；
For (i=0；i<10；i++)
{if(adc_get()>Adc) adc=adc_get ()；delay(time)；}
return adc；Adc=0；}
Wherein, the value of time is the ratio of cycle length and acquisition density, is such as measured at 50 hz, one group of measurement 10
It is secondary, then time=20ms/10=2ms.
5 groups of data are acquired with the method, remove maximum value and minimum value, then carry out average calculating, removal collects
Random error value；Complementary filter is carried out to 5 groups of data, i.e.,：
Info1_adc2=info1_adc1*0.8+info1_adc2*0.2；
Wherein, info1_adc2 indicates the 2nd group of data of the 1st sensor.
Thus rotation measures intensity data of 4 sensors within shorter a period of time, then carries out simulation curve meter
It calculates；Since signal strength is inversely proportional at a distance from sensor and electric wire, thus simulation curve computational algorithm can be simplified to it is as follows
Problem：
The coordinate of known 4 sensors As 1, A2, A3, A4 central points is respectively (0,0), and (0, a), (b, a), (b, 0) are unknown
Curve crosses wherein maximum of points, and is inversely proportional with the minimum range of 4 points and 4 point values；Seek curve of approximation expression formula；
Since whether we can not accurately learn it by one of sensor, then it can first assume that it passes through signal most
Strong sensor；Assuming that this sensor is A1；Analysis can be drawn a conclusion：
When A1 values are maximum, A2 values are minimum, then it necessarily passes through A3, between A4 two sensors；
When A1 values are maximum, A3 values are minimum, then it necessarily passes through A1, between A4 two sensors；
When A1 values are maximum, A4 values are minimum, then it necessarily passes through A2, between A3 two sensors；
To pass through A2, for A3：
First find out the point (x that the satisfaction distance between A2, A3 is equal to intensity inverse ratio1,y1), have
x1×A2=(b-x1)×A3
Point (the x that the satisfaction distance between A2 and A4 is equal to intensity inverse ratio is found out again2,y2), have
(x2 2+(a-y2)2)A2 2=((b-x2)2+y2 2)×A4 2
ax2+by2=ab
(x is found out respectively1,y1), (x2,y2), then it is (0,0) to cross point A1 coordinates by conic section, then can set curve as y=α
x2+ β x, curve can be found out by bringing at 2 points；When other points are maximum value, computational methods are similar.
This curve is shown on our LCD display 7 by trace-point method, other is mixed and checks circuit, just realize
Function；
The flow of program, as shown in Fig. 6.Hardware initialization is carried out first, and then whether detection sensor has connected, such as
Fruit is not connected then to report an error, and judges that signal occurs whether connector is connected on host, enters if having connected if having connected
50Hz signal detection modes enter 250Hz signal detection modes if not connected；Microcontroller is judged whether by PCA
50Hz 250Hz signals, if it is not, then returning to whether detection sensor has connected, if it is, acquisition intensity, calculates
Simulation curve is simultaneously shown.It returns to again whether detection sensor connects after completing display, carries out next round detection and simulation
4th step：Wall is tested
When the electromagnetic wave given off in wall is weaker, it is difficult to directly detect the electromagnetic wave of 50Hz.Connector is occurred into for signal
It is extracted from host, disconnects the power supply of test line itself, any one socket of connector insertion circuit is occurred into for signal and beaten
Switch.Connector, which occurs, for signal can generate the square wave of a 250Hz, this square wave can make entire circuit to external radiation 250Hz
Electromagnetic wave.Host can automatically switch to 250Hz signal detection modes at this time.Signal acquisition process is similar, and PCA modules are for knowing
Level signal data are 250Hz or the electromagnetic wave close to 250Hz, if it is, acquiring signal strength by ADC module；It is no
Then ADC can be considered as invalid signals, without signal strength analysis.Four collected intensity datas of sensor can by microcontroller into
Row analysis calculates, and obtains place on line, and show on the lcd screen.The benefit of connector occurs using signal also can pass through letter
Number intensity judges the approximate depth of circuit in wall.
1) it is directed to the measurement method of wall circuit that can not be fully powered-off
It then keeps signal that plug occurs first to be connected on host；Booting, waiting system self-test, errors excepted prompt please by
It is checked according to the content；It checks whether operating mode is 50Hz on screen, if it is carries out in next step, if it is not,
It please check that signal occurs whether connector is plugged；Far from test line, such as at this time without any display, then instrument be operated in interference compared with
In small environment, it can be used normally；Instrument is parallel to metope close to wall, sensor parallel is kept to be affixed on surface of wall,
It measures, center Screen will appear the apparent position of circuit in wall at this time, and quadrangle can show each sensor to induction signal
Intensity value.
On the electromagnetic sensor that the 50Hz electromagnetic wave inductions of line radiation make to copper-clad plate in wall, generate faint
50Hz alternating electric fields；This alternating electric field controls the break-make of field-effect tube, generates one therewith similar to the electric signal of waveform；This
A electric signal carries out voltage follow and voltage amplification respectively by two digital amplifiers of LM358；Amplified signal passes through
Shaping circuit carries out signal shaping, is shaped to square wave to facilitate signal analysis and processing；Square wave after shaping divide two-way into
Enter microcontroller, calls the ADC module and PCA modules of microcontroller respectively；PCA modules for identification signal data be 50Hz or
Person close to 50Hz electromagnetic wave, if it is, acquiring signal strength by ADC module；Otherwise ADC can be considered as invalid signals, not into
Row signal strength analysis；Four collected signal strengths of sensor can carry out analysis calculating by microcontroller, obtain place on line,
And it shows on the lcd screen；Center Screen will appear the apparent position of circuit in wall at this time, and quadrangle can show each sensor pair
Induction signal intensity value, screen lower section can show approximate depth of the circuit on the inside of wall；Power supply is closed after measurement.
2) it is directed to the measurement method of wall circuit that can be fully powered-off；
Signal generation connector is extracted from host, disconnects the power supply of test line itself, connector, which is occurred, for signal is inserted into
Any one socket of circuit simultaneously turns on the switch；Connector, which occurs, for signal can generate the square wave of a 250Hz, this square wave can make
Electromagnetic wave of the entire circuit to external radiation 250Hz；When connector, which occurs, for signal is extracted from host, host internal switch disconnects,
Host can automatically switch to 250Hz signal detection modes, this design may be implemented to automate and prevent maloperation；Signal acquisition
Process is similar with 50Hz acquisition modes, and difference is that signal data is 250Hz or close to 250Hz to PCA modules for identification
Electromagnetic wave, if it is, acquiring signal strength by ADC module；Otherwise ADC can be considered as invalid signals, without signal strength
Analysis；Four collected intensity datas of sensor can carry out analysis calculating by microcontroller, obtain place on line, and be shown in
In LCD screen；Center Screen will appear the apparent position of circuit in wall at this time, and quadrangle can show that each sensor is strong to induction signal
Angle value, screen lower section can show approximate depth of the circuit on the inside of wall；Power supply is closed after measurement.
Claims (1)
1. a kind of test method using special wall line analyzer, characterized in that this method utilizes special wall circuit
Analyzer is tested, by carrying out analog signal analysis and Digital Signal Analysis pair to the electromagnetic wave of external radiation to wall circuit
Weight analysis, by the intuitive displays line position of LCD screen, digital display electromagnetic intensity, can to " can be fully powered-off " and
" can not be fully powered-off " two kinds of wall circuits carry out place on line and measure analysis；Method is as follows：
The first step：The making of special wall line analyzer
Special wall line analyzer occurs junction portion by host machine part and signal and forms；
Host machine part by box body (11), left and right handrail (6,8), four electromagnetic sensors, display screen (7), power interface (9),
USB communication interfaces (10) and wall line analyzer circuit board are constituted；Install first respectively at four angles of box body (11) first,
Second, third, the 4th electromagnetism pass device device (1,2,3,4), when four electromagnetic sensors installation, should be arranged on same plane, four
Electromagnetic sensor is made of copper-clad plate, is connected on master control borad using coaxial cable inner core；Left and right handrail (6,8) is right respectively
Title is fixedly installed on the upper surface of box body (11), then display screen (7) is installed on the upper surface middle cavity of box body (11),
Power interface (9) and USB communication interfaces (10) are respectively installed to the side of box body (11)；Wall line analyzer master control borad is by list
Piece machine minimum system circuit, power circuit, Acquisition Circuit, shaping circuit, LCD display circuit are constituted, are made of a pcb board；
It carries out rationally covering copper when PCB design, simulation ground and digitally isolation and other related anti-tampering designs；
Signal occurs in junction portion, and 250Hz square wave signal generator circuits are independently mounted at signal and occur in connector (5), letter
Number generation connector (5) is mounted on the top of box body (11), and the side that connector (5) occurs for signal is equipped with three-wire type alternating current male connector,
It can also be removed according to the concrete condition of test；
Second step：Motherboard circuits are debugged
Motherboard circuits are debugged first since power circuit；Remove the chip on microcontroller socket；Power on, multimeter is surveyed
Whether the voltage for measuring each voltage network is normal, then checks if you have questions power circuit；
Signal acquisition circuit and signal transformation circuit are debugged respectively using oscillograph, can be incited somebody to action when junction circuit debugging occurs for signal
It is connected on an empty insert row, then opens host power supply, and oscilloscope measurement is used when upper left sensor is close to insert row
The signal waveforms of INFO1 over the ground then can be considered that union line connection occurs for signal as can detecting the sine wave of 250Hz or so
No problem；
Third walks：Write programmed algorithm
Collected signal strength, and calculating simulation curve position are calculated according to the collected signal strength values of four sensors
It sets；For square wave, data conversion is carried out using the ADC that microcontroller carries；It is that signal is carried out by peak-to-peak value for sine wave
Strength co-mputation, the signal strength carried out in a cycle continuously measure,
If collected ADC numerical value, if it is greater than preceding value, value before covering is similar to：
unsigned int info_adc_get()
{unsigned int adc,i；
For (i=0；i<10；i++)
{if(adc_get()>Adc) adc=adc_get ()；delay(time)；}
return adc；Adc=0；}
Wherein, the value of time be cycle length with acquire density ratio, with the method acquire 5 groups of data, remove maximum value and
Then minimum value carries out average calculating, removes collected random error value；Complementary filter is carried out to 5 groups of data, i.e.,：
Info1_adc2=info1_adc1*0.8+info1_adc2*0.2
Wherein, info1_adc2 indicates the 2nd group of data of the 1st sensor；
Thus rotation measures the intensity data of four sensors, then carries out simulation curve calculating；Due to signal strength and sensing
The distance of device and electric wire is inversely proportional, and simulation curve computational algorithm is simplified to following problem：
Known 4 sensors As 1, A2, A3, the coordinates of A4 central points are respectively (0,0), (0, a), (b, a), (b, 0)；Unknown song
Line crosses wherein maximum of points, and is inversely proportional with the minimum range of 4 points and 4 point values；Seek curve of approximation expression formula；
Since whether we can not accurately learn it by one of sensor, then it can first assume that it passes through signal strongest
Sensor；Assuming that this sensor is A1；Analysis can be drawn a conclusion：
When A1 values are maximum, A2 values are minimum, then it necessarily passes through A3, between A4 two sensors；
When A1 values are maximum, A3 values are minimum, then it necessarily passes through A1, between A4 two sensors；
When A1 values are maximum, A4 values are minimum, then it necessarily passes through A2, between A3 two sensors；
To pass through A2, for A3：
First find out the point (x that the satisfaction distance between A2, A3 is equal to intensity inverse ratio1,y1), have
x1×A2=(b-x1)×A3
Point (the x that the satisfaction distance between A2 and A4 is equal to intensity inverse ratio is found out again2,y2), have
(x2 2+(a-y2)2)A2 2=((b-x2)2+y2 2)×A4 2
ax2+by2=ab
(x is found out respectively1,y1), (x2,y2), then it is (0,0) to cross point A1 coordinates by conic section, then can set curve as y=α x2+β
X, curve can be found out by bringing at 2 points；When other points are maximum value, computational methods are similar；
This curve is shown on our LCD display 7 by trace-point method, other is mixed and checks circuit, just realize function；
The flow of program：Hardware initialization is carried out first, then whether detection sensor has connected, and reports an error if not connected,
Judge that signal occurs whether connector is connected on host if having connected, 50Hz signal detection moulds are entered if having connected
Formula enters 250Hz signal detection modes if not connected；Microcontroller judges whether it is that 50Hz or 250Hz believes by PCA
Number, if it is not, then returning to whether detection sensor has connected, if it is, acquisition intensity, calculating simulation curve are simultaneously shown；
It returns to again whether detection sensor connects after completing display, carries out next round detection and simulation；
4th step：Wall is tested
Wall test is divided to circuit in wall fully powered-off can not can be carried out with fully powered-off two kinds of situations with circuit in wall；
1) it is directed to the measurement method of wall circuit that can not be fully powered-off
It then keeps signal that plug occurs first to be connected on host；Booting, waiting system self-test, errors excepted prompt is please according to institute
Content is stated to be checked；It checks whether operating mode is 50Hz on screen, if it is carries out in next step, if it is not, please examine
It looks into signal and occurs whether connector is plugged；Far from test line, such as at this time without any display, then it is smaller to be operated in interference for instrument
In environment, it can be used normally；Close to wall, measuring, center Screen will appear the apparent position of circuit in wall at this time,
Quadrangle can show that each sensor corresponds to signal strength values；Approximate depth of the circuit on the inside of wall can be shown below screen；It surveys
Power supply is closed after amount；
2) it is directed to the measurement method of wall circuit that can be fully powered-off；
The power supply for then disconnecting test line first pulls up signal and plug occurs, is connected to any one socket of test line
On, plug switch occurs for opening signal；Booting, waiting system self-test, errors excepted prompt are please checked according to the content；
It checks whether operating mode is 250Hz on screen, if it is carries out in next step, if it is not, please check that connector occurs for signal
Whether it is plugged；Far from test line, such as at this time without any display, then instrument, which is operated in, interferes in smaller environment, Ke Yizheng
It is often used；Close to wall, measure, center Screen will appear the apparent position of circuit in wall at this time, and quadrangle can be shown often
A sensor corresponds to signal strength values, and approximate depth of the circuit on the inside of wall can be shown below screen；It is closed after measurement
Power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810034539.7A CN108387815B (en) | 2018-01-15 | 2018-01-15 | Testing method using special wall line analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810034539.7A CN108387815B (en) | 2018-01-15 | 2018-01-15 | Testing method using special wall line analyzer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108387815A true CN108387815A (en) | 2018-08-10 |
| CN108387815B CN108387815B (en) | 2020-08-14 |
Family
ID=63076293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810034539.7A Expired - Fee Related CN108387815B (en) | 2018-01-15 | 2018-01-15 | Testing method using special wall line analyzer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108387815B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110441825A (en) * | 2019-09-04 | 2019-11-12 | 上海海事大学 | The visible detection method of electric wire within the walls |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001013143A1 (en) * | 1999-08-11 | 2001-02-22 | Aegis Pty Ltd | Locating device and method |
| JP2008216040A (en) * | 2007-03-05 | 2008-09-18 | Tokyo Electric Power Co Inc:The | Voltage application type failure probe system and method |
| CN101907678A (en) * | 2010-07-12 | 2010-12-08 | 西安西电科大电力科技有限公司 | Cable fault test system and determining method of fault point |
| US20110025334A1 (en) * | 2001-08-22 | 2011-02-03 | Brune Guenter W | Locating Arrangement and Method Using Boring Tool and Cable Locating Signals |
| US20130320983A1 (en) * | 2012-06-01 | 2013-12-05 | Hagenuk Kmt Kabelmesstechnik Gmbh | Method and Apparatus for Target-Guided Localizing of a Cable Fault |
| CN204101677U (en) * | 2014-09-26 | 2015-01-14 | 国家电网公司 | A kind of cable digital display is synchronously fixed a point path instrument |
| CN104698339A (en) * | 2015-02-11 | 2015-06-10 | 国家电网公司 | Handheld fault finding instrument of power circuit in wall |
| CN106154104A (en) * | 2016-08-30 | 2016-11-23 | 朱石明 | A kind of body of wall concealed wire accurate lookup tool of remote-controlled signal source intensity |
-
2018
- 2018-01-15 CN CN201810034539.7A patent/CN108387815B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001013143A1 (en) * | 1999-08-11 | 2001-02-22 | Aegis Pty Ltd | Locating device and method |
| US20110025334A1 (en) * | 2001-08-22 | 2011-02-03 | Brune Guenter W | Locating Arrangement and Method Using Boring Tool and Cable Locating Signals |
| JP2008216040A (en) * | 2007-03-05 | 2008-09-18 | Tokyo Electric Power Co Inc:The | Voltage application type failure probe system and method |
| CN101907678A (en) * | 2010-07-12 | 2010-12-08 | 西安西电科大电力科技有限公司 | Cable fault test system and determining method of fault point |
| US20130320983A1 (en) * | 2012-06-01 | 2013-12-05 | Hagenuk Kmt Kabelmesstechnik Gmbh | Method and Apparatus for Target-Guided Localizing of a Cable Fault |
| CN204101677U (en) * | 2014-09-26 | 2015-01-14 | 国家电网公司 | A kind of cable digital display is synchronously fixed a point path instrument |
| CN104698339A (en) * | 2015-02-11 | 2015-06-10 | 国家电网公司 | Handheld fault finding instrument of power circuit in wall |
| CN106154104A (en) * | 2016-08-30 | 2016-11-23 | 朱石明 | A kind of body of wall concealed wire accurate lookup tool of remote-controlled signal source intensity |
Non-Patent Citations (1)
| Title |
|---|
| 徐逢秋等: "多功能墙体探测仪的设计方法", 《仪器仪表学报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110441825A (en) * | 2019-09-04 | 2019-11-12 | 上海海事大学 | The visible detection method of electric wire within the walls |
| CN110441825B (en) * | 2019-09-04 | 2021-04-27 | 上海海事大学 | Visual detection method for electric wire in wall |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108387815B (en) | 2020-08-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102866377B (en) | The detection check system and method for the online monitoring assembly of transformer partial discharge and location | |
| CN105911499B (en) | Ultrasonic wave shelf depreciation metering system and method under site environment | |
| CN105223537A (en) | A kind of electric energy meter is visited one house after another pick-up unit and method | |
| CN105137161A (en) | Digital composite functional high-voltage electroscope | |
| CN109444638A (en) | A kind of smart grounding conduction detecting system and method | |
| CN108387815A (en) | A kind of test method using special wall line analyzer | |
| CN108802498A (en) | A kind of earth resistance tester | |
| CN110398662A (en) | A kind of multi-function jack tester | |
| CN205983210U (en) | Detecting system of magnetic suspension controller | |
| CN208000358U (en) | A kind of electric energy meter main PCB A device for detecting performance | |
| CN109884510A (en) | Control panel automatic detection system and detection method | |
| CN107290707A (en) | A kind of method and system for recognizing power information acquisition system electrical energy meter fault | |
| CN208091992U (en) | Suction-type gas-detecting device | |
| CN203216981U (en) | Intelligent high-voltage live-line display blocking device based on AVR singlechip | |
| CN207395833U (en) | For the tamper detection circuit of valve control device metering platelet | |
| CN203117344U (en) | On/off tester capable of detecting omitted hole | |
| CN206193129U (en) | Millimeter wave detector automatic test system | |
| CN104851342A (en) | Electricity stealing prevention device aiming contact electricity stealing and noncontact electricity stealing | |
| CN205844441U (en) | Detection device is run in a kind of power equipment lost territory | |
| CN205539154U (en) | High voltage electrified display locking apparatus | |
| CN112034280B (en) | Portable platform door system multiplex detection switch testing arrangement | |
| CN205264012U (en) | High accuracy natural gas leakage detector based on thing networking | |
| CN2927068Y (en) | RS232 series wire inspector | |
| CN216052120U (en) | Non-contact substation secondary circuit broken string detector | |
| CN209372981U (en) | Common mode test fixture with stitch contact detection function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| 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: 20200814 Termination date: 20220115 |