CN107144742A - A kind of hand-held wideband environment of electric field tester and its electric field measurement method - Google Patents
A kind of hand-held wideband environment of electric field tester and its electric field measurement method Download PDFInfo
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- CN107144742A CN107144742A CN201710389259.3A CN201710389259A CN107144742A CN 107144742 A CN107144742 A CN 107144742A CN 201710389259 A CN201710389259 A CN 201710389259A CN 107144742 A CN107144742 A CN 107144742A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/12—Measuring electrostatic fields or voltage-potential
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Abstract
The invention discloses a kind of hand-held wideband environment of electric field tester and its electric field measurement method, including main frame and the probe that is made up of electric-field sensor, wave detector, preamplifier, wherein：Electric-field sensor, for omni-directionally induced environment electric field, current signal transfer is converted into wave detector by the electric field signal of sensing；Wave detector, for receiving above-mentioned current signal and carrying out detection to the current signal, obtains modulated signal and transmits to preamplifier；Preamplifier, main frame is then transmit to for receiving the modulated signal of wave detector and high-fidelity amplification being carried out to the signal；Main frame, for receiving transducer signal and analog-to-digital conversion and filtering process are carried out to the signal, then carry out output display；The main frame is flexibly connected with probe by being electromagnetically shielded connector.Present invention measurement band limits is wide；It is easy to replace different probes；Effectiveness is good；Realize fault self-diagnosis function, rapid-maintenance；Small volume, it is lightweight, it is easy to carry.
Description
Technical field
The present invention relates to electric field radiation detection technique field, and in particular to a kind of hand-held wideband environment of electric field tester and
Its electric field measurement method.
Background technology
With the fast development of modern communicationses industry and electronics industry, cause in environment for human survival electric field and magnetic field nowhere
Do not exist, electric field and magnetic energy density constantly strengthen, and service band is constantly broadening, how quick detection turns into important topic, with
Ensure staff and the public is healthy, equipment safety operation.At present, electric field measuring apparatus on the market is narrow in the presence of measurement frequency band
The problems such as (measurement frequency band within 5GHz), fault location are difficult, maintenanceability is poor, function is single, weight is big, it is impossible to satisfaction pair
Environment of electric field intensity detection demand.
The content of the invention
The technical problems to be solved by the invention are that measurement frequency band is narrow, it is therefore intended that provide a kind of hand-held wideband environment electricity
Field tester and its electric field measurement method, the width of increase measurement frequency band.
The present invention is achieved through the following technical solutions：
A kind of hand-held wideband environment of electric field tester, including main frame and by electric-field sensor, wave detector, preamplifier
The probe of composition, wherein：
Electric-field sensor, for omni-directionally induced environment electric field, is converted into current signal by the electric field signal of sensing and passes
Transport to wave detector；
Wave detector, for receiving above-mentioned current signal and carrying out detection to the current signal, obtains modulated signal and transmits
To preamplifier；
Preamplifier, is then transmit to for receiving the modulated signal of wave detector and high-fidelity amplification being carried out to the signal
Main frame；
Main frame, for receiving transducer signal and analog-to-digital conversion and filtering process are carried out to the signal, then exported
Display；
The main frame is flexibly connected with probe by being electromagnetically shielded connector.
The present invention utilizes electric-field sensor omni-directionally induced environment electric field, and utilize wave detector based on probe and main frame
Preliminary treatment is carried out to the electric field signal of detection with preamplifier, then is transferred to main frame being analyzed and processed, by prior art
In 5GHz within measurement frequency band increase to 1MHz-18GHz, considerably increase measurement frequency band width.
Further, electric-field sensor is made up of three antennas for being respectively induced space three-dimensional electric field.
Further, the circuit of probe includes X to sensor circuit, Y-direction sensor circuit, Z-direction sensor circuit, operation amplifier mould
Block, the electric field information is sensed jointly from X to sensor circuit, Y-direction sensor circuit, Z-direction sensor circuit, and passes through operation amplifier mould
Main frame is passed to after block amplification.Wherein X to, Y-direction, Z-direction adapt to X-axis in three-dimensional system of coordinate, Y-axis, Z axis respectively.
Further, the X includes inductance L1, resistance R1, resistance R2, resistance R3, resistance R4, diode to sensor circuit
D1, electric capacity C1, resistance R13, the inductance L1 two ends connect resistance R1 and resistance R3 respectively, resistance R1 connection inductance L1 ends it is another
One end is sequentially connected in series with resistance R2, resistance R13, and the other end at resistance R3 connection inductance L1 ends is connected with resistance R4, and resistance R4 connects
The other end ground connection at connecting resistance R3 ends, diode D1 anode is connected on the circuit that resistance R3 is connected with resistance R4, diode
D1 negative electrode is connected on the circuit that resistance R1 is connected with resistance R2, and electric capacity C1 one end is connected to resistance R2 and is connected with resistance R13
Circuit on, the other end at electric capacity C1 connection resistance R2 ends ground connection；
The Y-direction sensor circuit includes inductance L2, resistance R5, resistance R6, resistance R7, resistance R8, diode D2, electric capacity
C2, resistance R14, the inductance L2 two ends connect resistance R5 and resistance R7 respectively, the other end at resistance R5 connection inductance L2 ends with
Resistance R6, resistance R14 are sequentially connected in series, and the other end at resistance R7 connection inductance L2 ends is connected with resistance R8, resistance R8 connection resistance
The other end ground connection at R7 ends, diode D2 anode is connected on the circuit that resistance R7 is connected with resistance R8, diode D2 the moon
Pole is connected on the circuit that resistance R5 is connected with resistance R6, and electric capacity C2 one end is connected to the circuit that resistance R6 is connected with resistance R14
On, the other end ground connection at electric capacity C2 connection resistance R6 ends；
The Z-direction sensor circuit includes inductance L3, resistance R9, resistance R10, resistance R11, resistance R12, diode D3, electricity
Hold C3, resistance R15, the inductance L3 two ends connect resistance R9 and resistance R11, the other end at resistance R9 connection inductance L3 ends respectively
It is sequentially connected in series with resistance R10, resistance R15, the other end at resistance R11 connection inductance L3 ends is connected with resistance R12, resistance R12 connects
The other end ground connection at connecting resistance R11 ends, diode D3 anode is connected on the circuit that resistance R11 is connected with resistance R12, two poles
Pipe D3 negative electrode is connected on the circuit that resistance R9 is connected with resistance R10, and electric capacity C3 one end is connected to resistance R10 and resistance R15
On the circuit of connection, the other end ground connection at electric capacity C3 connection resistance R10 ends；
The operation amplifier module includes operational amplifier U1, resistance R16, electric capacity C4, the resistance R13 connection resistance R2
The other end, the other end at resistance R14 connection resistance R6 ends, the other end at resistance R15 connection resistance R10 ends at end are commonly connected to
Operational amplifier U1 positive input, resistance R16 one end is connected to operational amplifier U1 positive input, resistance R16's
The other end is connected to operational amplifier U1 output end, and electric capacity C4 is connected in parallel on resistance R16 two ends.
Further, when main frame includes analog-to-digital conversion and filter circuit, processor, display screen, data memory module, calendar
Clock module, keyboard and alarm prompt module, reset circuit, wherein：
Analog-to-digital conversion and filter circuit, for receiving transducer signal and analog-to-digital conversion and filtering are carried out to the signal,
Digital data transmission is obtained to processor；
Processor, environment of electric field intensity is obtained for receiving the data signal, and the signal progress being handled, transmit to
Display screen is shown, is additionally operable to timing and is detected other functional parts of main frame；
Data memory module, the data being related to for storing in processor；
Calendar clock module, temporal information is provided by processor for main frame；
Keyboard and alarm prompt module, for information input and fault alarm；
Reset circuit, watchdog function is provided for processor.
Analog-to-digital conversion and filter circuit carry out Analog-digital Converter to the electric field signal of probe detection, data signal relative to
Analog signal its strong antijamming capability, good confidentiality, meanwhile, data signal in transmission with exchanging with superiority, it is digital to lead to
The signal form of letter is consistent with signal used in computer, is easy to exchange the electric field information of collection to computer and is analyzed.Place
The electric field signal that device is not only sent to analyzing and processing probe is managed, and also needs to the work of other functional parts of timing detection main frame
State, the position that the quick Positioning electric field tester of energy breaks down, and abort situation is entered by keyboard and alarm prompt module
Row prompting, improves the maintenanceability of electrical field test instrument.
Further, a kind of hand-held wideband environment of electric field tester, in addition to power conversion and control module, the electricity
Source is converted and control module is used for the voltage needed for Power convert into main frame and probe each several part, and assist process device control master
The power switch of machine and probe each several part.
By processor real-time watch device state, opened according to equipment working state by power conversion and control module
Or corresponding functional unit circuit is closed, realize that optimal power supply is consumed, improve the working time of equipment.
Further, a kind of hand-held wideband environment of electric field tester, in addition to shell, the shell includes probe shell
Shell, interface plug, shield glass, alarm indicator, battery cover, slipmat, rubber key, hand after body, main frame fore shell, main frame
Shell phase mutually fastens and forms host shell, the bangle two ends and master after chain, probe shield connector, the main frame fore shell and main frame
Casing body is connected；Charging inlet and probe interface are provided with the top of host shell, the probing shell is inserted by probe shield device
Enter probe interface to be flexibly connected with host shell, connect probe by interface plug when without using probe interface and charging inlet
Mouth and charging inlet sealing；Multiple holes, including key hole, display shield aperture, indicator lamp hole, institute are provided with the main frame fore shell
State rubber key to be arranged in key hole, the display screen is arranged in display shield aperture, and the shield glass is crimped on display screen
Outside, the alarm indicator is arranged in indicator lamp hole；Shell is provided with battery hole after the main frame, and the battery cover is arranged on electricity
Chi Kongzhong；The protective pad is affixed on shell surface after main frame.
Shell also includes flexible close by conductive rubber strip between shell after conductive rubber strip, the main frame fore shell and main frame
With reference to；The battery cover is combined closely by conductive rubber strip with shell after main frame.Being achieved in that for electromagnetic shielding is mainly led to
The junction for crossing shell after main frame fore shell and main frame adds what conductive rubber strip was realized, and other also have before display screen plus shield glass,
Conductive rubber strip is used after battery cover and main frame between shell, to shield influence of the electromagnetic interference to measurement, measurement accuracy is improved, it is surveyed
Accuracy of measurement reaches ± 3dB.Shell, interface plug, battery cover use aluminum material after main frame fore shell, main frame.Due to electrical field test instrument
Generally carry with, its weight conference causes larger burden to staff, weight is mitigated to reach using aluminum material
Purpose.Probing shell uses two parts material, and wherein electric field and wave detector portion shell uses plastic casing, preamplifier and with master
Machine coupling part shell uses aluminum hull.
Further, a kind of electric field measurement method based on above-mentioned hand-held wideband environment of electric field tester,
Step one, electric field information is gathered by electric-field sensor, and electric field signal is converted into electric signal；
Step 2, detection, amplification, analog-to-digital conversion, circuit filtering, digitized filtered processing are carried out by above-said current signal；
Step 3, the signal after being handled in step 2 is shown by display screen.
Further, the digitized filtered uses transmission function
Carry out Digital Signal Processing, wherein aiAnd biFor limited parameter, constant coefficient is determined according to bandwidth and initial and by frequency.
Using LINEAR DIFFERENCE EQUATION WITH CONSTANT COEFFICIENTS formula, adaptively realize that digital band pass is filtered according to different frequency bands, simplifying calculation
Reach that the processing believed electric field is quick on the basis of method, improve the detection speed of electrical field test instrument.
Further, the method for the digitized filtered is as follows：
Step 20, digitized filtered is initialized；
Step 21, the frequency calculating simulation cut-off frequency according to measurement frequency band and up and down；
Step 22, centre frequency is calculated；
Step 23, frequency band is calculated；
Step 24, the parameter a of calculation of transfer functioni, wherein i is 0,1,2,3,4；
Step 25, the parameter b of calculation of transfer functioni, wherein i is 0,1,2,3,4；
Step 26, output valve is calculated according to transmission function；
Step 27, according to historical data amendment output valve；
Step 28, whether detection output valve flag bit is effective, if the flag bit effectively, is stored and shown to output valve
Effective measured value, measurement analysis terminates, and exits digitized filtered process；Conversely, carrying out automatic adjusument.
The present invention compared with prior art, has the following advantages and advantages：
1st, the width of present invention increase measurement frequency band, measurable frequency range is from 1MHz to 18GHz, wide coverage；
2nd, effectiveness of the present invention is good, and algorithm succinctly optimizes, it is ensured that measurement accuracy；
3rd, the present invention realizes fault self-diagnosis work(by processor timing detection each unit module, so as to quickly position failure
Position, improves maintenanceability；
4th, the present invention can regularly detect the working condition of each part of electrical field test instrument, so as to realize fault location, improve
The maintainability of electrical field test instrument；
5th, the present invention by probe be connected with host activities so that probe replacing conveniently, while also allow for user according to
Detection demand replaces the probe of respective type；
6th, the present invention improves its portability by reducing volume and weight.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is structured flowchart of the present invention；
Fig. 2 is probe circuit schematic diagram of the present invention；
Fig. 3 is power conversion of the present invention and control module schematic diagram；
Fig. 4 is digital filter flow chart of the present invention；
Fig. 5 is outer casing frontispiece structural representation of the present invention；
Fig. 6 is shell rear surface structural representation of the present invention.
Mark and corresponding parts title in accompanying drawing：
Shell after 1- probing shells, 2- main frame fore shells, 3- main frames, 4- interface plugs, 5- shield glass, 6- alarm indicators,
7- battery covers, 8- slipmat, 9- rubber keys, 10- bangles.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, with reference to embodiment and accompanying drawing, to this
Invention is described in further detail, and exemplary embodiment and its explanation of the invention is only used for explaining the present invention, does not make
For limitation of the invention.
Embodiment 1
As shown in figure 1, a kind of hand-held wideband environment of electric field tester, including main frame and by electric-field sensor, wave detector,
The probe that preamplifier is constituted, the sensor, wave detector, preamplifier are sequentially connected；The main frame turns including modulus
Change and filter circuit, processor, display screen, reset circuit, power conversion and control module, data memory module, calendar clock
Module, keyboard and alarm prompt module and lithium battery, the analog-to-digital conversion and filter circuit, display screen, data memory module, day
Calendar clock module, keyboard and alarm prompt module, reset circuit are connected with processor respectively, the power conversion and control module
It is connected with reset circuit, the lithium battery is connected with power conversion and control module；The preamplifier and main frame of the probe
Analog-to-digital conversion and filter circuit be flexibly connected.Wherein：
Electric-field sensor, for omni-directionally induced environment electric field, is converted into current signal by the electric field signal of sensing and passes
Transport to wave detector；Electric-field sensor is made up of three antennas for being respectively induced space three-dimensional electric field.
Wave detector, for receiving above-mentioned current signal and carrying out detection to the current signal, obtains modulated signal and transmits
To preamplifier；The present embodiment uses detector diode, using its unilateral conduction by high frequency or intermediate frequency radio signal
Low frequency signal or audio signal take out.
Preamplifier, is then transmit to for receiving the modulated signal of wave detector and high-fidelity amplification being carried out to the signal
Main frame；Preamplifier realizes purpose using the operational amplifier of high-fidelity high-gain.
As shown in Fig. 2 the circuit of the probe includes X to sensor circuit, Y-direction sensor circuit, Z-direction sensor circuit, computing
Amplification module, the electric field information is sensed from X to sensor circuit, Y-direction sensor circuit, Z-direction sensor circuit, and is passed through computing jointly
Main frame is passed to after amplification module amplification.
The X includes inductance L1, resistance R1, resistance R2, resistance R3, resistance R4, diode D1, electric capacity to sensor circuit
C1, resistance R13, the inductance L1 two ends connect resistance R1 and resistance R3 respectively, the other end at resistance R1 connection inductance L1 ends with
Resistance R2, resistance R13 are sequentially connected in series, and the other end at resistance R3 connection inductance L1 ends is connected with resistance R4, resistance R4 connection resistance
The other end ground connection at R3 ends, diode D1 anode is connected on the circuit that resistance R3 is connected with resistance R4, diode D1 the moon
Pole is connected on the circuit that resistance R1 is connected with resistance R2, and electric capacity C1 one end is connected to the circuit that resistance R2 is connected with resistance R13
On, the other end ground connection at electric capacity C1 connection resistance R2 ends；
The Y-direction sensor circuit includes inductance L2, resistance R5, resistance R6, resistance R7, resistance R8, diode D2, electric capacity
C2, resistance R14, the inductance L2 two ends connect resistance R5 and resistance R7 respectively, the other end at resistance R5 connection inductance L2 ends with
Resistance R6, resistance R14 are sequentially connected in series, and the other end at resistance R7 connection inductance L2 ends is connected with resistance R8, resistance R8 connection resistance
The other end ground connection at R7 ends, diode D2 anode is connected on the circuit that resistance R7 is connected with resistance R8, diode D2 the moon
Pole is connected on the circuit that resistance R5 is connected with resistance R6, and electric capacity C2 one end is connected to the circuit that resistance R6 is connected with resistance R14
On, the other end ground connection at electric capacity C2 connection resistance R6 ends；
The Z-direction sensor circuit includes inductance L3, resistance R9, resistance R10, resistance R11, resistance R12, diode D3, electricity
Hold C3, resistance R15, the inductance L3 two ends connect resistance R9 and resistance R11, the other end at resistance R9 connection inductance L3 ends respectively
It is sequentially connected in series with resistance R10, resistance R15, the other end at resistance R11 connection inductance L3 ends is connected with resistance R12, resistance R12 connects
The other end ground connection at connecting resistance R11 ends, diode D3 anode is connected on the circuit that resistance R11 is connected with resistance R12, two poles
Pipe D3 negative electrode is connected on the circuit that resistance R9 is connected with resistance R10, and electric capacity C3 one end is connected to resistance R10 and resistance R15
On the circuit of connection, the other end ground connection at electric capacity C3 connection resistance R10 ends；
The operation amplifier module includes operational amplifier U1, resistance R16, electric capacity C4, the resistance R13 connection resistance R2
The other end, the other end at resistance R14 connection resistance R6 ends, the other end at resistance R15 connection resistance R10 ends at end are commonly connected to
Operational amplifier U1 positive input, resistance R16 one end is connected to operational amplifier U1 positive input, resistance R16's
The other end is connected to operational amplifier U1 output end, and electric capacity C4 is connected in parallel on resistance R16 two ends.
In the probe circuit L1 sense X to electric field, transmitted by R1 and R3 to D1, after D1 detections, then by R2,
R4 and R13 are transmitted to operational amplifier U1, C1 and are filtered out high-frequency signal；L2 senses Y-direction electric field, is transmitted by R5 and R7 to D2, warp
Cross after D2 detections, then process R6, R8 and R14 are transmitted to operational amplifier U1, C2 and are filtered out high-frequency signal；L3 senses Z-direction electric field, warp
Cross R9 and R11 to transmit to D3, after D3 detections, then process R10, R12 and R15 are transmitted to operational amplifier U1, C3 and filtered out height
Frequency signal, the road signal of X, Y, Z tri- amplifies after operational amplifier U1 positive input is added by operational amplifier U1, R16
With the feedback circuit that C4 is operational amplifier.
Probe uses small dipole antenna, and its unilateral length is 3.75mm, and broadband is 0.5mm, while matching detection two
Pole pipe and transmission network, the transmission cable that resistivity is 3K Ω/mm is realized using photoetching technique, is realized high resistant transmission, can be surveyed
Amount frequency band is 1MHZ to 18GHz.
Main frame, for receiving transducer signal and analog-to-digital conversion and filtering process are carried out to the signal, then exported
Display；The main frame is flexibly connected with probe by being electromagnetically shielded connector.
As shown in figure 1, main frame includes analog-to-digital conversion and filter circuit, processor, display screen, data memory module, calendar
Clock module, keyboard and alarm prompt module, reset circuit, wherein：
Analog-to-digital conversion and filter circuit, for receiving transducer signal and analog-to-digital conversion and filtering are carried out to the signal,
Digital data transmission is obtained to processor；
Processor, environment of electric field intensity is obtained for receiving the data signal, and the signal progress being handled, transmit to
Display screen is shown, is additionally operable to timing and is detected other functional parts of main frame；
Data memory module, the data being related to for storing in processor；
Calendar clock module, temporal information is provided by processor for main frame；
Keyboard and alarm prompt module, for information input and fault alarm；
Reset circuit, watchdog function is provided for processor.
As shown in figure 3, power conversion and control module, the power conversion and control module are used for Power convert into master
Voltage needed for machine and probe each several part, and the power switch of assist process device control main frame and probe each several part.Power conversion
And the main devices that use of control module for rest-set flip-flop CD4013, FET IRF9610, power conversion module LM2576 and
AMS1117, logic circuit MAX6816 and SN74AUP1T00DCKT, triode 9013；Lithium battery uses rechargeable type lithium battery,
Its model CHLD29 6WH-7.4VI.
The power supply that charged lithium cells are provided is supplied to control circuit by the first power conversion module, and control circuit is touched by RS
Send out device and logic control circuit etc. to constitute, realize controlling switch (switch is FET IRF9610), reach Switching Power Supply mesh
, the voltage transformation of chargeable lithium cell is 5V by second source conversion module, and the 3rd power conversion module is linear by 5V power supplys
Change turns to 3.3V.
Electric-field sensor uses dipole antenna in the present embodiment；Preamplifier is put using the computing of high-fidelity high-gain
Big device, its model AD8065；The model MSS-30-B46-B45 of wave detector；Data conversion and filter circuit use AD7714
Integrated package；Processor uses MSP430F5659；The model DS1302 of calendar clock module；Reset circuit model
SP706EN；Data memory module model AT24C1024；Keyboard and alarm prompt module use membrane buttons and light-emitting diodes
Pipe；Display screen uses PQY4827；Power supply is powered using lithium battery, its small volume.
Embodiment 2
Based on a kind of electrical field test method of the hand-held wideband environment of electric field tester in embodiment 1, step one, by electricity
Field sensor gathers electric field information, and electric field signal is converted into electric signal；
Step 2, detection, amplification, analog-to-digital conversion, circuit filtering, digitized filtered processing are carried out by above-said current signal；
Step 3, the signal after being handled in step 2 is shown by display screen.
The data signal that MSP430F5659 processors are received using digital filter to main frame is digitized filtering；Institute
State digital filter and use transmission functionCarry out digital letter
Number processing, wherein aiAnd biFor limited parameter, constant coefficient is determined according to bandwidth and initial and by frequency.
As shown in figure 4, the method for digitized filtered is as follows：
Step 20, digitized filtered is initialized；
Step 21, the frequency calculating simulation cut-off frequency according to measurement frequency band and up and down；
Step 22, centre frequency is calculated；
Step 23, frequency band is calculated；
Step 24, the parameter a of calculation of transfer functioni, wherein i is 0,1,2,3,4；
Step 25, the parameter b of calculation of transfer functioni, wherein i is 0,1,2,3,4；
Step 26, output valve is calculated according to transmission function；
Step 27, according to historical data amendment output valve；
Step 28, whether detection output valve flag bit is effective, if the flag bit effectively, is stored and shown to output valve
Effective measured value, measurement analysis terminates, and exits digitized filtered process；Conversely, carrying out automatic adjusument.
Wherein, measurement frequency band is measurable band width, starts frequency point and end of the initial frequency for measurement frequency band
Frequency point, cut-off frequency is also the upper limiting frequency point of frequency band, that is, terminates Frequency point, and centre frequency is the center frequency points of frequency band,
Such as measurement frequency scope is 1GHz to 5GHz, then it is 4GHz to measure frequency band, and initial frequency is 1GHz and 5GHz, and cut-off frequency is
5GHz, centre frequency is 3GHz.
Embodiment 3
Based on the hand-held wideband environment of electric field tester in embodiment 1, shell is provided with, as shown in Figure 5 and Figure 6, outside
Shell include probing shell 1, main frame fore shell 2, main frame after shell 3, interface plug 4, shield glass 5, alarm indicator 6, battery cover 7,
Lead to after slipmat 8, rubber key 9, bangle 10, conductive rubber strip, probe shield connector, main frame fore shell 2 and main frame between shell 3
Conductive rubber strip flexibility is crossed to combine closely；The two ends of bangle 10 are connected with host shell, are set up bangle 10, are easy to taking for instrument
Band；Charging inlet and probe interface are provided with the top of host shell, the probing shell 1 is inserted by probe shield connector and visited
Head interface is flexibly connected with host shell, and probing shell 1 and host shell are flexibly connected by probe interface, is easy to probe more
Change；Probe interface and charging inlet are sealed by interface plug 4 when without using probe interface and charging inlet；The main frame
Multiple holes, including key hole, display shield aperture, indicator lamp hole are provided with fore shell 1, the rubber key 9 is arranged on key hole
In, the display screen is arranged in display shield aperture, and the shield glass 5 is crimped on outside display screen, and the alarm indicator 6 is set
In indicator lamp hole；Shell 3 is provided with battery hole after the main frame, and the battery cover 7 is tight by conductive rubber strip and shell after main frame 3
Close combination.The protective pad 8 is affixed on the surface of shell 3 after main frame, for increasing friction during handheld device.Probing shell 1 point two
The shell of part, antenna and wave detector part uses plastic casing, preamplifier and is adopted with the shell of host interface section
With aluminum hull and standard plug；Shell 3, interface plug 4, battery cover 7 use aluminum material after main frame fore shell 2, main frame；Conductive rubber strip
It is for reducing electromagnetic interference with shield glass 5, realizes the inside and outside electromagnetic shielding of good body, it is ensured that measurement accuracy, use
Aluminum material is then the weight for reducing tester.
Probe is placed in probing shell 1, and main frame is placed in host housing, and the weight of whole tester is less than 2KG, its main frame
Appearance and size length × width x thickness of shell is：190mm × 190mm × 65mm, this reduce the volume and weight of tester, is improved
The portability of tester.
Probing shell 1 uses two parts material, and wherein electric field and wave detector portion shell uses plastic casing, preamplifier and
Aluminum hull is used with main frame coupling part shell.Shell 3, interface plug 4, battery cover 7 use aluminum material after main frame fore shell 2, main frame.
Embodiment 4
Use operating process based on the environment of electric field tester in embodiment 1-3 is：
Step 1：Main frame and probe are taken out from instrument container, interface plug 4 is removed from probe interface, inserted a probe into
In the probe interface of main frame；
Step 2：Touch by the power key being once arranged on host housing panel, to device power-on；
Step 3：Waiting facilities initialization, fault self-checking etc., until display screen shows measuring state；
Step 4：Parameter setting is carried out according to measurement request, such as measurement is shown as " mW/cm2 " still " V/m ", sets up
Finish return measurement state；
Step 5：To pop one's head in be placed in needs the position detected to measure, and need to such as preserve measurement data, can be by host housing
" preservation " key on panel.
Step 6：Record measured value or inquiry measured value；
Step 7：Return to step 5 continues to measure, until measurement is finished；
Step 8：Touch makes equipment powered-down by the power key on a host housing panel；
Step 9：Probe is removed, interface plug 4 is filled in probe interface, probe and main frame are put into instrument container.
Above-described embodiment, has been carried out further to the purpose of the present invention, technical scheme and beneficial effect
Describe in detail, should be understood that the embodiment that the foregoing is only the present invention, be not intended to limit the present invention
Protection domain, within the spirit and principles of the invention, any modification, equivalent substitution and improvements done etc. all should be included
Within protection scope of the present invention.
Claims (10)
1. a kind of hand-held wideband environment of electric field tester, it is characterised in that including main frame and probe, the probe is included successively
Electric-field sensor, wave detector, the preamplifier of connection, wherein：
Electric-field sensor, for omni-directionally induced environment electric field, current signal transfer is converted into wave detector by electric field signal；
Wave detector, for receiving above-mentioned current signal and carrying out detection to the current signal, obtains modulated signal and transmits to preceding
Put amplifier；
Preamplifier, master is then transmit to for receiving the modulated signal of wave detector and high-fidelity amplification being carried out to the signal
Machine；
Main frame, for receiving transducer signal and analog-to-digital conversion and filtering process are carried out to the signal, then carry out output display；
The main frame is flexibly connected with probe by being electromagnetically shielded connector.
2. a kind of hand-held wideband environment of electric field tester according to claim 1, it is characterised in that the electric field sensing
Device includes three antennas for being respectively induced space three-dimensional electric field.
3. a kind of hand-held wideband environment of electric field tester according to claim 1, it is characterised in that the electricity of the probe
Road includes X to sensor circuit, Y-direction sensor circuit, Z-direction sensor circuit, operation amplifier module, wherein X to, Y-direction, Z-direction with it is three-dimensional
The X-axis of coordinate system, Y-axis, Z axis are adapted；The electric field information is total to from X to sensor circuit, Y-direction sensor circuit, Z-direction sensor circuit
With sensing, and by passing to main frame after the amplification of operation amplifier module.
4. a kind of hand-held wideband environment of electric field tester according to claim 3, it is characterised in that
The X includes inductance L1, resistance R1, resistance R2, resistance R3, resistance R4, diode D1, electric capacity C1, electricity to sensor circuit
R13 is hindered, the inductance L1 two ends connect resistance R1 and resistance R3, the other end and resistance at resistance R1 connection inductance L1 ends respectively
R2, resistance R13 are sequentially connected in series, and the other end at resistance R3 connection inductance L1 ends is connected with resistance R4, resistance R4 connection resistance R3 ends
Other end ground connection, diode D1 anode is connected on the circuit that resistance R3 is connected with resistance R4, diode D1 negative electrode company
It is connected on the circuit that resistance R1 is connected with resistance R2, electric capacity C1 one end is connected on the circuit that resistance R2 is connected with resistance R13, electricity
Hold the other end ground connection at C1 connection resistance R2 ends；
The Y-direction sensor circuit includes inductance L2, resistance R5, resistance R6, resistance R7, resistance R8, diode D2, electric capacity C2, electricity
R14 is hindered, the inductance L2 two ends connect resistance R5 and resistance R7, the other end and resistance at resistance R5 connection inductance L2 ends respectively
R6, resistance R14 are sequentially connected in series, and the other end at resistance R7 connection inductance L2 ends is connected with resistance R8, resistance R8 connection resistance R7 ends
Other end ground connection, diode D2 anode is connected on the circuit that resistance R7 is connected with resistance R8, diode D2 negative electrode company
It is connected on the circuit that resistance R5 is connected with resistance R6, electric capacity C2 one end is connected on the circuit that resistance R6 is connected with resistance R14, electricity
Hold the other end ground connection at C2 connection resistance R6 ends；
The Z-direction sensor circuit include inductance L3, resistance R9, resistance R10, resistance R11, resistance R12, diode D3, electric capacity C3,
Resistance R15, the inductance L3 two ends connect resistance R9 and resistance R11, the other end and the electricity at resistance R9 connection inductance L3 ends respectively
Resistance R10, resistance R15 are sequentially connected in series, and the other end at resistance R11 connection inductance L3 ends is connected with resistance R12, resistance R12 connections electricity
The other end ground connection at R11 ends is hindered, diode D3 anode is connected on the circuit that resistance R11 is connected with resistance R12, diode D3
Negative electrode be connected on the circuit that resistance R9 is connected with resistance R10, electric capacity C3 one end is connected to resistance R10 and is connected with resistance R15
Circuit on, the other end at electric capacity C3 connection resistance R10 ends ground connection；
The operation amplifier module includes operational amplifier U1, resistance R16, electric capacity C4, the resistance R13 connections resistance R2 ends
The other end, the other end at resistance R14 connection resistance R6 ends, the other end at resistance R15 connection resistance R10 ends are commonly connected to computing
Amplifier U1 positive input, resistance R16 one end is connected to operational amplifier U1 positive input, and resistance R16's is another
End is connected to operational amplifier U1 output end, and electric capacity C4 is connected in parallel on resistance R16 two ends.
5. a kind of hand-held wideband environment of electric field tester according to claim 1, it is characterised in that the main frame includes
Analog-to-digital conversion and filter circuit, processor, display screen, data memory module, calendar clock module, keyboard and alarm prompt mould
Block, reset circuit, wherein：
Analog-to-digital conversion and filter circuit, for receiving transducer signal and analog-to-digital conversion and filtering are carried out to the signal, obtain
Digital data transmission is to processor；
Processor, obtains environment of electric field intensity for receiving the data signal, and the signal progress being handled, transmits to display
Screen is shown, is additionally operable to timing and is detected other functional parts of main frame；
Data memory module, the data being related to for storing in processor；
Calendar clock module, temporal information is provided by processor for main frame；
Keyboard and alarm prompt module, for information input and fault alarm；
Reset circuit, watchdog function is provided for processor.
6. a kind of hand-held wideband environment of electric field tester according to claim 5, it is characterised in that also become including power supply
Change and control module, the power conversion and control module are used for the electricity needed for Power convert into main frame and probe each several part
Pressure, and the power switch of assist process device control main frame and probe each several part.
7. according to any described a kind of hand-held wideband environment of electric field tester in claim 1 to 6, it is characterised in that also
Including shell, the shell includes shell (3), interface plug (4), shield glass after probing shell (1), main frame fore shell (2), main frame
(5), alarm indicator (6), battery cover (7), slipmat (8), rubber key (9), bangle (10), probe shield connector, institute
State shell (3) mutually fastening after main frame fore shell (2) and main frame and form host shell, bangle (10) two ends connect with host shell
Connect；Charging inlet and probe interface are provided with the top of host shell, the probing shell (1) is inserted by probe shield device and popped one's head in
Interface is flexibly connected with host shell, by interface plug (4) by probe interface when without using probe interface and charging inlet
With charging inlet sealing；Multiple holes, including key hole, display shield aperture, indicator lamp hole are provided with the main frame fore shell (1),
The rubber key (9) is arranged in key hole, and the display screen is arranged in display shield aperture, shield glass (5) crimping
Outside display screen, the alarm indicator (6) is arranged in indicator lamp hole；Shell (3) is provided with battery hole after the main frame, described
Battery cover (7) is arranged in battery hole；The protective pad (8) is affixed on shell after main frame (3) surface.
8. based on a kind of electric field measurement method of the hand-held wideband environment of electric field tester described in claim 1-7, its feature
It is, step one, electric field information is gathered by electric-field sensor, and electric field signal is converted into electric signal；
Step 2, detection, amplification, analog-to-digital conversion, circuit filtering, digitized filtered processing are carried out by above-said current signal；
Step 3, the signal after being handled in step 2 is shown by display screen.
9. a kind of electric field signal processing method according to claim 8, it is characterised in that the digitized filtered is using biography
Delivery functionCarry out Digital Signal Processing, wherein aiAnd bi
For limited parameter, constant coefficient is determined according to bandwidth and initial and cut-off frequency.
10. a kind of electric field signal processing method according to claim 9, it is characterised in that the side of the digitized filtered
Method is as follows：
Step 20, digitized filtered is initialized；
Step 21, the frequency calculating simulation cut-off frequency according to measurement frequency band and up and down；
Step 22, centre frequency is calculated；
Step 23, frequency band is calculated；
Step 24, the parameter a of calculation of transfer functioni, wherein i is 0,1,2,3,4；
Step 25, the parameter b of calculation of transfer functioni, wherein i is 0,1,2,3,4；
Step 26, output valve is calculated according to transmission function；
Step 27, according to historical data amendment output valve；
Step 28, whether detection output valve flag bit is effective, if the flag bit effectively, is stored to output valve and shown effectively
Measured value, measurement analysis terminate, exit digitized filtered process；Conversely, carrying out automatic adjusument.
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