CN203643515U - Transient electromagnetic pulse electric field tester - Google Patents
Transient electromagnetic pulse electric field tester Download PDFInfo
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- CN203643515U CN203643515U CN201320838739.0U CN201320838739U CN203643515U CN 203643515 U CN203643515 U CN 203643515U CN 201320838739 U CN201320838739 U CN 201320838739U CN 203643515 U CN203643515 U CN 203643515U
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Abstract
The utility model relates to a transient electromagnetic pulse electric field tester. The transient electromagnetic pulse electric field tester comprises a detector, an optical fiber and a receiver which are connected in sequence. The detector is used for extracting electric field signals, carrying out signal conditioning, converting the electric signals into optical signals and outputting the optical signals. The optical fiber is used for transmitting the optical signals for a long distance. The receiver is used for receiving the optical signals transmitted by the optical fiber, converting the optical signals into electric signals, carrying out signal conditioning on the electric signals again, and outputting and displaying the electric signals. The utility model aims to provide the electric field tester which is large in dynamic range, short in action time and wide in frequency spectrum range, and therefore, the requirements for testing specific electromagnetic pulse signals are met.
Description
Technical field
The utility model relates to a kind of electrical field test device, relates in particular to a kind ofly can test the electric field arrangement that dynamic range is large, action time is short, spectral range is wide.
Background technology
Along with the development of electronic technology, various equipments are applied semiconductor and IC more and more at large, for example, so high power electromagnetic pulse has immeasurable destruction (power signal of thunder and lightning, the output of nuclear electromagnetic pulse simulator) to equipment facility.The ability that assessment equipment electromagnetic pulse-resisting destroys becomes more and more important.A kind of special electrical field test device of examination process need (requiring electrical field test instrument can test the electric field that dynamic range is large, action time is extremely short, spectral range is wide).Existing electrical field test instrument is generally used for test weak electric field, in the time testing for highfield by force, electromagnetic energy enters testing tool inside by cable, metal aperture seam, produces induction current and makes internal circuit occur that function is damaged or work is disturbed, and therefore cannot reflect actual electrical field characteristic.The existing instrument response speed that can test highfield is excessively slow, is difficult to test extremely short electric field signal action time.Therefore existing electrical field test instrument mostly can not meet this demand.
Summary of the invention
The purpose of this utility model is to provide a kind of can carry out the electrical field test device that dynamic range is large, action time is short, spectral range is wide, meets the demand of test special electromagnetic pulse signal.
Technical solution of the present utility model:
Transient electromagnetic pulse electrical field test instrument, its special character is: comprise the detector, optical fiber and the receiver that connect successively,
Described detector is used for extracting electric field signal, carries out signal condition, converts electrical signals to light signal output;
Described optical fiber is for carrying out long-distance transmissions to light signal;
Described receiver, for receiving the light signal that optical fiber transmits, is converted to electric signal by light signal, again electric signal is carried out after signal condition output display.
Above-mentioned detector comprises electric field induction device, induced signal modulate circuit, balanced-unbalanced translation circuit, electro-optical conversion circuit and detector power supply; Described electric field induction device is two, is symmetricly set on the input end of induced signal modulate circuit;
Described electric field induction device is for being converted into voltage signal by transient electric field pulse;
Described induced signal modulate circuit is for carrying out amplitude fading to voltage signal;
Described balanced-unbalanced translation circuit, for the differential voltage signal carrying out after amplitude fading is converted to single-ended voltage signal according to linear rule in broad frequency range, is exported to electro-optical conversion circuit by single-ended voltage signal;
Single-ended voltage signal is converted into light signal output by described electro-optical conversion circuit;
Described detector power supply is for powering to balanced-unbalanced translation circuit and electro-optical conversion circuit;
The FC/APC type connector that the light signal output interface of described electro-optical conversion circuit is flanged dish.
Above-mentioned detector power supply comprises rechargeable battery set, voltage stabilizing chip U1 and DC/DC power transfer module U2, the input end of the output termination voltage stabilizing chip U1 of described rechargeable battery set, the input end of the output termination DC/DC power transfer module U2 of described voltage stabilizing chip U1;
Above-mentioned electric field induction device comprises induction rod, positioning seat and welded post, described induction rod is vertically fixed on the lower surface of positioning seat, described welded post is vertically fixed on the top surface of positioning seat, and described positioning seat is fixed on the circuit board of detector inside in the mode of soldering by welded post.
Above-mentioned inductor signal conditioning circuit comprises dividing potential drop capacitor C
divwith equivalent capacity C
induct, described dividing potential drop capacitor C
divbeing connected of one end and an electric field induction device, described dividing potential drop capacitor C
divother end ground connection, described equivalent capacity C
inductone end link with another electric field induction device, described equivalent capacity C
inductthe other end and dividing potential drop capacitor C
divone end connect.
Described dividing potential drop capacitor C
divmeet following relationship:
Wherein: V
inductthe induction electromotive force of-electric field induction device, unit is V;
V
sthe signal voltage of-voltage divider output, unit is V/m;
C
inductthe equivalent capacity of-electric field induction device, unit is mm;
C
div-dividing potential drop electric capacity, unit is pF.
Above-mentioned balanced-unbalanced translation circuit comprises operational amplifier U3 and operational amplifier U4,
In-phase input end+IN1 of described operational amplifier U3 fetches the signal INDUCT-of self-induction signal conditioning circuit, described operational amplifier U3 inverting input-IN2 fetches the signal INDUCT+ of self-induction signal conditioning circuit, signal INDUCT-is by the first output terminal OUT1 output signal OUT-of operational amplifier U3 after operational amplifier U3 inter-process, and signal OUT-enters inverting input-IN of operational amplifier U4 by resistance R 3;
Signal INDUCT+ is OUT+ by the second output terminal OUT2 output signal of operational amplifier U3 after operational amplifier U3 inter-process, and signal OUT+ enters in-phase input end+IN of operational amplifier U4 by resistance R 5;
Differential signal OUT+, the OUT-of input are converted to single-ended signal OUT-4817 by operational amplifier U4, and single-ended signal OUT-4817 is exported by the output terminal of operational amplifier U4;
Two positive power source terminals (+Vs1 ,+Vs2) of described operational amplifier U3 all connect positive supply, and two negative power ends (Vs1 ,-Vs2) of described operational amplifier U3 all connect negative supply;
Described operational amplifier U4 positive power source terminal+Vs connects positive supply, and described operational amplifier U4 negative power end-Vs connects negative supply;
Above-mentioned balanced-unbalanced translation circuit also comprises anode input frequency response Circuit tuning and negative terminal input frequency response Circuit tuning, and signal INDUCT+ first inputted frequency response Circuit tuning through anode before entering operational amplifier U3; Signal INDUCT-is first through negative terminal input frequency response Circuit tuning before entering operational amplifier U3, and described negative terminal input frequency response Circuit tuning comprises resistance R 1, a termination signal INDUCT+ of described resistance R 1, the other end ground connection of described resistance R 1; Described anode input frequency response Circuit tuning comprises resistance R 2, a termination signal INDUCT-of described resistance R 2, the other end ground connection of described resistance R 2;
Also comprise electric source filter circuit, described electric source filter circuit comprises electric capacity, described electric capacity one end ground connection, and the other end is connected with power supply.
Above-mentioned electro-optical conversion circuit comprises signal adaptation circuit, light stimulus device U7, working point regulating circuit:
Described signal adaptation circuit comprises capacitor C 14 and resistance R 12, and single-ended signal OUT-4817 inputs to one end of capacitor C 14, and the other end of described capacitor C 14 is connected with one end of resistance R 12, and the other end of described resistance R 12 is connected with the LDC end of light stimulus device U7;
Described working point regulating circuit comprises amplifier chip U5, voltage stabilizing chip U6, triode Q1 and peripheral circuit, and described amplifier chip U5 comprises the first transport and placing device and the second transport and placing device,
One end of the negative pole connecting resistance R10 of described voltage stabilizing chip U6, public termination-5V power supply of the negative pole of voltage stabilizing chip U6 and resistance R 10, a stiff end of the anodal connecting resistance RP1 of described voltage stabilizing chip U6, one end of the common port connecting resistance R9 of the positive pole of voltage stabilizing chip U6 and resistance R P1, another stiff end of the other end connecting resistance RP1 of resistance R 10, the other end ground connection of resistance R 9;
The sliding end of the first transport and placing device 1IN+ terminating resistor RP1 of described amplifier chip U5;
The 2IN+ end of the second transport and placing device of described amplifier chip U5 is connected with the common port of resistance R 9 and RP1 by resistance R 8, between the output terminal 2OUT of the second transport and placing device of amplifier chip U5 and the inverting input 2IN-of the second transport and placing device, be connected with capacitor C 12, the power end ground connection of the second transport and placing device of amplifier chip U5, the ground connection termination negative supply of the first transport and placing device;
The PDA signal of the PDA end output of described light stimulus device U7 inputs to the inverting input 2IN-of the second transport and placing device; After the PDA signal of the direct current biasing signal superimposed light driver U7 output of the 1OUT end output of the first transport and placing device, input to the inverting input of the second transport and placing device of amplifier chip U5, after the signal of the signal that the second transport and placing device of amplifier chip U5 is inputted 2IN+ end and the input of 2IN-end compares, from the 2OUT pin output TO-B signal of the second transport and placing device of amplifier chip U5, the base stage that TO-B signal enters triode Q1 through resistance R 13, diode D1;
The collector of described triode Q1 is connected to the other end of resistance R 12 by inductance L 1, resistance R 11, the emitter of described triode Q1 is connected with-5V power supply by resistance R 14;
The LDC pin of described light stimulus device U7, the electric signal that the input of LDA pin pin will be changed; Light signal after Out1 pin, the Out2 pin output conversion of light stimulus device U7; The optical signal power size of the PAD pin output monitor signal monitoring U7 output of light stimulus device U7.
Above-mentioned receiver comprises photoelectric conversion module, signal condition unit, display unit, signal output unit and receiver power supply,
Described photoelectric conversion module comprises optical receiver U8, and the anode of optical receiver U8 connects negative supply, the electric signal OUT-E after the negative electrode output photoelectric conversion of optical receiver U8, the earth terminal ground connection of optical receiver U8; The input end of optical receiver U8 is that LIN+ and input end LIN-connect light signal;
Described signal condition unit comprises one-level amplifying circuit and second amplifying circuit road, and one-level amplifying circuit comprises chip U9, and second amplifying circuit comprises chip U10;
The electric signal of optical receiver U8 output enters the inverting input IN-of chip U9 through resistance R 16, after the anti-phase amplification of chip U9, from the output terminal OUT output of amplifier chip U9, between the inverting input IN-of amplifier chip U9 and the output terminal OUT of amplifier chip U9, be connected with resistance R 17;
The signal of the output terminal OUT output of chip U9 enters the in-phase input end IN+ of amplifier chip U10 by shunt capacitance group C20, C21, output terminal OUT from chip U10 after amplifier chip U10 carries out homophase amplification exports, the inverting input IN-of amplifier chip U10 is by resistance R 22 ground connection, and the output terminal OUT of the inverting input IN-of chip U10 and amplifier chip U10 is connected with resistance R 23;
Positive power source terminal+Vs of amplifier chip U9 connects positive supply, negative power end-Vs of amplifier chip U9 connects negative supply, positive power source terminal+Vs of amplifier chip U10 connects positive supply, negative power end-Vs of amplifier chip U10 connects negative supply, also comprise electric source filter circuit, described electric source filter circuit comprises filter capacitor, described filter capacitor one end ground connection, a termination power.
Above-mentioned display unit comprises display driver circuit and display module, described display driver circuit is in-phase amplification circuit, described display driver circuit comprises chip U11 and peripheral circuit, the signal of the output terminal output of amplifier chip U9 enters the normal phase input end IN+ of chip U11 through inductance L 2, potentiometer RP2, output terminal from chip U11 after the homophase of chip U11 amplifies is exported
The in-phase input end IN+ of described chip U11 is connected with resistance R 19, the other end ground connection of resistance R 19, and the inverting input IN-of described chip U11 is connected with resistance R 18, the other end ground connection of described resistance R 18; The inverting input IN-of described chip U11 and the output terminal of chip U11 are connected with resistance R 20,
Described display module is DM series digit panel table.
The utility model has advantages of:
This transient electromagnetic pulse electrical field test instrument, through experimental verification, reaches following technical indicator:
1, can test the electric field signal that dynamic range is large.Can test the electric field signal of amplitude range in 4.5kV/m～55kV/m, test signal amplitude range covers an order of magnitude.Amplitude (vertically) resolution that can test signal is 1kV/m.
2, can test short electric field signal action time.The minimum 1.8ns of being of rise time that can test electric field signal, the halfwidth time that can test electric field signal exceedes 35ns.
3, can test the wide electric field signal of spectral range.Can test the electric field signal of bandwidth like 200MHz.
4, the transient electromagnetic pulse electrical field test instrument continous-stable working time is not less than 8 hours.Built-in monitoring circuit, regulates automatically, systems stabilisation output.
Accompanying drawing explanation
Fig. 1 is the system diagram of the utility model transient electromagnetic pulse electrical field test instrument;
Fig. 2 is the theory diagram of the utility model detector;
Fig. 3 is the schematic diagram of the utility model detector power circuit;
Fig. 4 is the structural representation of the utility model electric field induction device, wherein 1-welded post, 2-positioning seat, 3-induction rod;
Fig. 5 is the utility model inductor signal conditioning circuit schematic diagram;
Fig. 6 is the utility model operational amplifier U3 interlock circuit figure;
Fig. 7 is the utility model operational amplifier U4 interlock circuit figure;
Fig. 8 is the structural drawing of the utility model electro-optical conversion circuit;
Fig. 9 is the theory diagram of the utility model receiver;
Figure 10 is the structural drawing of the utility model photoelectric conversion module;
Figure 11 is the structural drawing of the utility model signal condition unit;
Figure 12 is the schematic diagram of the utility model display driver circuit.
Embodiment
Describe embodiment of the present utility model in detail below in conjunction with Figure of description, but embodiment of the present utility model is not limited to this.
As shown in Figure 1, transient electromagnetic pulse electrical field test instrument is made up of detector, receiver and optical fiber three parts.The function of detector is to extract electric field signal, carries out signal condition, converts electrical signals to light signal output.Light signal carries out long-distance transmissions by optical fiber.The function of receiver is to receive the signal that optical fiber transmits, and light signal is converted to electric signal, again electric signal is carried out after signal condition output display.Fiber lengths is 50m; the double-deck ultraviolet curable acrylate coating of fiber selection, it has the ability of superior protection optical fiber, makes optical fiber have very good anti-microbend performance simultaneously; greatly improve the adaptive faculty of optical fiber to varying environment, improved the performance of product.。
As shown in Figure 2, detector is made up of electric field induction device and induced signal modulate circuit, balanced-unbalanced translation circuit, electro-optical conversion circuit and detector power circuit.Transient electric field pulse is converted into voltage signal by electric field induction device, electric field induction device signal conditioning circuit is decayed, carry out signal processing through balanced-unbalanced translation circuit again, give electro-optical conversion circuit by final single-ended signal, by optical fiber driver, voltage signal is converted into light signal output.Detector adopts rechargeable battery set power supply, and rechargeable battery set voltage is 7.2V.Light signal output interface is the FC/APC type connector of flanged dish.
As Fig. 3, detector adopts rechargeable battery set as power supply, and electric battery output meets voltage stabilizing chip U1.After battery is the long-time power supply of circuit, electric weight can reduce, and cell output voltage also decreases, and directly uses powered battery, can cause circuit performance fluctuation, can guarantee that by voltage stabilizing chip U1 the operating voltage of circuit remains constant.U1 inside circuit also has overcurrent, overheated and adjust the holding circuit of pipe, and few with the peripheral cell that U1 composition stabilized voltage supply is required, it is reliable, convenient to use, and low price.U1 input voltage 6.5V～9V, the constant 5V of output voltage.Voltage stabilizing chip U1 output meets DC/DC power transfer module U2, and power transfer module U2 for general+5V voltage transitions is ± 5V voltage, to meet circuit board power requirement.U2 input voltage+5V, output voltage ± 5V.Add tantalum electric capacity and carry out power filter at U1 input end (1 pin of U1), U2 output terminal (5 pin of U2 and 7 pin).
As shown in Figure 2, electric field induction device is symmetrical structure, and the structural member identical by two covers forms.Fig. 4 is the outside drawing of one of them electric field induction device.In Fig. 4, electric field induction device is made up of induction rod, positioning seat, welded post three parts, and induction rod is for induction field signal, and induction rod is perpendicular to positioning seat, and welded post is perpendicular to positioning seat, and the geometric relationship between three guarantees by machining.Positioning seat is close on circuit board, and is fixed on circuit board in the mode of soldering by welded post.(induced signal modulate circuit, balanced-unbalanced translation circuit, electro-optical conversion circuit and the detector power circuit of detector inside realized by a circuit board, this circuit board is exactly the circuit board of detector inside) finally obtain following effect: induction rod is perpendicular to circuit board, the constant distance between induction rod and circuit board simultaneously.Induction rod is right cylinder, and positioning seat is rectangular parallelepiped, and welded post is right cylinder.Electric field induction device adopts brass material to make.
As shown in Figure 5, electric field induction device signal conditioning circuit adopts capacitive divider to realize.The intrinsic standoff ratio K of voltage divider is:
In formula 1:
V
inductthe induction electromotive force of-electric field induction device, unit: (V);
V
sthe signal voltage of-voltage divider output, unit: (V/m);
C
inductthe equivalent capacity of-electric field induction device, unit: (mm);
C
div-dividing potential drop electric capacity, unit: (pF).
After the electric field induction device size of transient electromagnetic pulse electrical field test instrument is determined, the equivalent capacity C of this electric field induction device
inductjust determine, by adjusting dividing potential drop capacitor C
divsize, can carry out effective dividing potential drop to electric field induction device induced signal, and after making to decay, signal meets the best input signal amplitude scope of impedance inverter circuit.Because electric field induction device is symmetrical structure, the structural member identical by two covers forms.Each electric field induction device connects a dividing potential drop capacitor C
div, two electric field induction devices connect respectively dividing potential drop electric capacity separately, and two electric field induction devices need 2 dividing potential drop electric capacity altogether.The dividing potential drop capacitor C of one of them electric field induction device
divc8 in corresponding diagram 6, the dividing potential drop capacitor C of another electric field induction device
divc9 in corresponding diagram 6; The two ends formation signal INDUCT+ of capacitor C 9, the two ends formation signal INDUCT-(INDUCT+ of capacitor C 8 and INDUCT-signal are transferred to the input end of balanced-unbalanced translation circuit).
Balanced-unbalanced translation circuit schematic diagram is shown in Fig. 6 and Fig. 7.Balanced-unbalanced translation circuit for being converted to single-ended signal according to linear rule by differential signal in broad frequency range.Balanced-unbalanced translation circuit input signal INDUCT+, INDUCT-, output signal is OUT-4817.OUT-4817 is the single-ended voltage signal of reflection Field signature.Balanced-unbalanced translation circuit forms take operational amplifier U3 and operational amplifier U4 as core, employing ± 5V Power supply.In Fig. 6,2 pin of U3 and 10 pin fetch respectively signal INDUCT-, the INDUCT+ from electric field induction device, INDUCT-signal is exported by 13 pin of U3 after U3 inter-process, output signal is OUT-, and OUT-signal enters the inverting input (2 pin) of U4 by resistance R 3; INDUCT+ signal is exported by 5 pin of U3 after U3 inter-process, and output signal is OUT+, and OUT+ signal enters the in-phase input end (3 pin) of U4 by resistance R 5.In Fig. 7, differential signal OUT+, the OUT-of input are converted to single-ended signal OUT-4817 by U4, and OUT-4817 is exported by 6 pin of U4.
6 pin of U3 and connect+5V of 14 pin power supply, 4 pin of U3 and connect-5V of 12 pin power supply, connect+5V of the 7 pin power supply of U4, connect-5V of the 4 pin power supply of U4, capacitor C 4, C5, C6, C7, C10, C11 are for power filter, and R1, R2 are used for inputting frequency response adjustment.
When the loaded impedance of balanced-unbalanced translation circuit is 100 Ω, when ± 5V Power supply, balanced-unbalanced translation circuit bandwidth can reach 400MHz.
Electro-optical conversion circuit is shown in Fig. 8.Electro-optical conversion circuit converts electrical signals to light signal, then by optical fiber, light signal is carried out to remote undistorted transmission.Electro-optical conversion circuit input electrical signal is from impedance inverter circuit, and electric signal is OUT-4817; Electro-optical conversion circuit output optical signal, electro-optical conversion circuit output connects optical fiber.Electro-optical conversion circuit is made up of signal adaptation circuit, light stimulus device, working point regulating circuit.The FC/APC type connector that the light signal output interface of electro-optical conversion circuit is flanged dish.
Signal adaptation circuit comprises capacitor C 14 and resistance R 12, and single-ended signal OUT-4817 inputs to one end of capacitor C 14, and the other end of capacitor C 14 is connected with one end of resistance R 12, and the other end of described resistance R 12 holds 1 pin to be connected with the LDC of light stimulus device U7; Capacitor C 14 stopping direct currents are logical to be exchanged, and resistance R 12 is for impedance adjustment, and Inhibitory signal reflects.
Working point regulating circuit comprises amplifier chip U5, voltage stabilizing chip U6, triode Q1 and peripheral circuit, and described amplifier chip U5 comprises the first transport and placing device and the second transport and placing device,
One end of the negative pole connecting resistance R10 of voltage stabilizing chip U6, public termination-5V power supply of the negative pole of U6 and resistance R 10.A stiff end of the anodal connecting resistance RP1 of described voltage stabilizing chip U6, one end of the common port connecting resistance R9 of the positive pole of voltage stabilizing chip U6 and resistance R P1.Another stiff end of the other end connecting resistance RP1 of resistance R 10.The other end ground connection of resistance R 9.
The sliding end of first transport and placing device 1IN+ end (3 pin) connecting resistance RP1 of amplifier chip U5.Sliding end by resistance R P1, for the first transport and placing device provides a reference voltage, makes a direct current biasing signal identical with reference voltage of 1OUT end (1 pin of U5) output of the first transport and placing device by this reference voltage.
The 2IN+ end (5 pin) of the second transport and placing device of amplifier chip U5 is by the common port of resistance R 8 connecting resistance R9 and RP1.Common port by resistance R 9 and RP1 provides a reference voltage for the second transport and placing device.
Between the output terminal 2OUT of the second transport and placing device of amplifier chip U5 and the inverting input 2IN-of the second transport and placing device, be connected with capacitor C 12,
The power end ground connection of the second transport and placing device of U5, the ground connection termination negative supply of the first transport and placing device.
The PDA signal of PDA end (4 pin) output of light stimulus device U7 inputs to 6 pin of the inverting input 2IN-(U5 of the second transport and placing device); After the PDA signal (4 pin of U7) of the direct current biasing signal superimposed light driver U7 output of 1OUT end (1 pin of the U5) output of U5, input to the inverting input (6 pin) of the second transport and placing device of U5, after the second transport and placing device of U5 compares 2IN+ signal (5 pin) and 2IN-signal (6 pin), from 2OUT pin (7 pin) the output TO-B signal of the second transport and placing device of U5.The base stage that TO-B signal enters triode Q1 through resistance R 13, diode D1.
The collector of triode Q1 is connected to the other end of resistance R 12 by inductance L 1, resistance R 11, the emitter of triode Q1 is connected with-5V power supply by resistance R 14.
The electric signal that 1, the 2 pin input of light stimulus device U7 will be changed; Light signal after 5, the 6 pin output conversions of U7; 4 pin output monitor signal (output monitor signal is PDA signal, and output monitor signal is electric signal)---the optical signal power sizes of monitoring U7 output of U7;
The working point regulating circuit course of work is: the electric signal that will change is by 1, the 2 pin inputs of light stimulus device U7, and LDC pin (1 pin) connects signal, LDA pin (2 pin) ground connection.The meanwhile PDA pin of U7 (4 pin) output monitor signal (PDA signal), produces TO-B control signal by PDA signal.TO-B control signal reacts on the LDC signal (1 pin of U7) of light stimulus device U7 after amplifying by triode Q1, by this closed-loop control process implementation light stimulus device U7 output optical signal power stability.
Light stimulus device U7 is a high-performance single mode semiconductor laser, 1GHz bandwidth, the built-in high stability laser chip of this device (laser instrument LD), intensity monitor photodiode (monitoring PIN pipe), optoisolator, be exclusively used in analog signal transmission, this device index distribution control is accurate, and geometrical property is superior and decline is low, has good anti-microbend performance, stable dynamic fatigue resistance, is applicable to two-forty, long Distance Transmission.
Working point regulating circuit is for the luminous power of light stable driver U7 output.By working point is rationally set, light stimulus device U7 will be operated in linear work district, and in the time that U7 causes Output optical power fluctuation due to temperature or other influences, change bias condition that can be suitable, maintains the stable of Output optical power.
Amplifier chip U5 the inside include two high-gains, independently, the double operational of internal frequency compensation, U5 has low input bias current, low input offset voltage and offset current, common-mode input voltage range is wide, DC voltage gain high (about 100dB), unity gain bandwidth (about 1MHz), low power consumption current, be suitable for the features such as powered battery.Form emitter follower by U5A, form integrator by U5B and capacitor C 12.Dividing potential drop on RP1 enters the in-phase input end of U5A, because be follower, U5A output voltage is identical with input voltage.Dividing potential drop on R9 enters the in-phase input end of U5B by R8, the output of U5B connects the base stage of triode by resistance R 13 and diode D1, triode Q1 emitter is by connect-5V of resistance R 14 power supply, and light stimulus device U7 inner laser device LD connects the collector of triode Q1 by inductance L 1, electric capacity R11.By regulating the output voltage of U5B, can change the base current of triode Q1, transistor base Current Control collector current size, collector current changes the bias condition that can change light stimulus device U7 inner laser device LD, and luminous power is controlled.
The effective output of light dorsad that receives laser instrument LD of monitoring PIN of light stimulus device U7, because light and forward light are proportional dorsad, in the time that laser instrument LD Output optical power increases, PIN pipe output signal increases, and (integrator output signal is negative voltage, and negative voltage absolute value is larger in the absolute value increase of integrator output signal, voltage value is less), transistor base electric current reduces, and then transistor collector electric current reduces, and finally causes light stimulus device U7 inner laser device LD Output optical power to reduce.In the time that light stimulus device U7 inner laser device LD Output optical power reduces, PIN pipe output signal reduces, the absolute value of integrator output signal reduces that (integrator output signal is negative voltage, negative voltage absolute value is less, voltage value is larger), transistor base electric current increases, and then the increase of transistor collector electric current, finally causes light stimulus device U7 inner laser device LD Output optical power to increase.
As Fig. 9, receiver is made up of photoelectric conversion module, signal condition unit, display unit, signal output unit, receiver power supply circuit.The light signal that receiver transmits optical fiber is converted to electric signal, then this electric signal is carried out to signal processing, finally exports.
As Figure 10, photoelectric conversion module is made up of optical receiver U8, the light signal that U8 is responsible for front end to be transmitted by optical fiber is converted to electric signal, U8 has the feature of low input capacitance, low return loss, low intermodulation distortion, its work optical maser wavelength 1310nm, the encapsulation of employing micro coaxle, signal transmission can reach 3GHz, meets receiver requirement completely.U8 employing-5V power supply, connect-5V of the 3 pin power supply of U8, the electric signal after 2 pin output photoelectric conversions, 1 pin ground connection.
As Figure 11, signal condition unit is made up of two-stage amplifying circuit, and one-level amplifying circuit is see-saw circuit, and second amplifying circuit is in-phase amplification circuit, one-level amplifying circuit forms take amplifier chip U9 as core, and second amplifying circuit forms take amplifier chip U10 as core.All adopt ± 5V of one-level amplifying circuit and second amplifying circuit Power supply.The electric signal of optical receiver U8 output enters 2 pin of U9 through resistance R 16, the signal after anti-phase amplification is through the 6 pin outputs of U9, and resistance R 16, R17 are used for setting enlargement factor, and enlargement factor equals the ratio of R17 and R16.The 6 pin output signals of U9 enter 3 pin of U10 by shunt capacitance group C20, C21, the signal after homophase amplifies is through the 6 pin outputs of U10, and resistance R 22, R23 are used for setting enlargement factor, and the ratio that enlargement factor equals R23 and R22 adds one.The effect of shunt capacitance group C20, C21 is the logical interchange of stopping direct current.Connect+5V of the 7 pin power supply of U9, connect-5V of the 4 pin power supply of U9; Connect+5V of the 7 pin power supply of U10, connect-5V of the 4 pin power supply of U10, capacitor C 18, C19, C24, C24 are for power filter.
Display unit is for display light watt level, and it is made up of display driver and display module.The signal of one-level amplifying circuit output, after display driver amplifies, shows by display module.As Figure 12, display driver is in-phase amplification circuit, form take amplifier chip U11 as core, the electric signal of the 6 pin outputs of U9 is through inductance L 2, after potentiometer RP2, enter 3 pin of U11, signal after homophase amplifies is through the 6 pin outputs of U11, inductance L 2 is for suppressing high fdrequency component, make the DC component of reacting luminous power size enter display driver circuit, potentiometer RP2 is for attenuating dc component, resistance R 19 plays high-frequency signal impedance matching effect, suppress the reflection of display driver circuit, prevent from causing the input signal of second amplifying circuit to distort because introducing display driver circuit impact.Resistance R 18, R20 are used for setting enlargement factor, and enlargement factor equals the ratio of R20 and R18.Display module adopts ripe DM series digit panel table, and this instrument adopts versatility watchcase, possesses volume small and exquisite, the feature that range is large, precision is high.
Receiver adopts 220V50Hz ac power supply, and electric main is that direct current is the power supply of receiver internal circuit by receiver power supply module converts, and receiver power supply module is high frequency switch power, input 220V50HZ alternating current, output ± 5V direct current.Receiver power supply module has the features such as wide input voltage range, conversion efficiency are high, input and output isolation, and antijamming capability is strong, possesses overcurrent, overheated, short-circuit protection and self-recovering function.
Claims (10)
1. transient electromagnetic pulse electrical field test instrument, is characterized in that: comprise the detector, optical fiber and the receiver that connect successively,
Described detector is used for extracting electric field signal, carries out signal condition, converts electrical signals to light signal output;
Described optical fiber is for carrying out long-distance transmissions to light signal;
Described receiver, for receiving the light signal that optical fiber transmits, is converted to electric signal by light signal, again electric signal is carried out after signal condition output display.
2. transient electromagnetic pulse electrical field test instrument according to claim 1, is characterized in that: described detector comprises electric field induction device, induced signal modulate circuit, balanced-unbalanced translation circuit, electro-optical conversion circuit and detector power supply; Described electric field induction device is two, is symmetricly set on the input end of induced signal modulate circuit;
Described electric field induction device is for being converted into voltage signal by transient electric field pulse;
Described induced signal modulate circuit is for carrying out amplitude fading to voltage signal;
Described balanced-unbalanced translation circuit, for the differential voltage signal carrying out after amplitude fading is converted to single-ended voltage signal according to linear rule in broad frequency range, is exported to electro-optical conversion circuit by single-ended voltage signal;
Single-ended voltage signal is converted into light signal output by described electro-optical conversion circuit;
Described detector power supply is for powering to balanced-unbalanced translation circuit and electro-optical conversion circuit.
3. transient electromagnetic pulse electrical field test instrument according to claim 2, it is characterized in that: described detector power supply comprises rechargeable battery set, voltage stabilizing chip U1 and DC/DC power transfer module U2, the input end of the output termination voltage stabilizing chip U1 of described rechargeable battery set, the input end of the output termination DC/DC power transfer module U2 of described voltage stabilizing chip U1;
Input end 1 pin of described voltage stabilizing chip U1 connects tantalum capacitor C 1, an output termination tantalum capacitor C 2 of described DC/DC power transfer module U2, another output termination tantalum capacitor C 3.
4. transient electromagnetic pulse electrical field test instrument according to claim 2, it is characterized in that: described electric field induction device comprises induction rod, positioning seat and welded post, described induction rod is vertically fixed on the lower surface of positioning seat, described welded post is vertically fixed on the top surface of positioning seat, and described positioning seat is fixed on the circuit board of detector inside in the mode of soldering by welded post.
5. according to arbitrary described transient electromagnetic pulse electrical field test instrument of claim 2-5, it is characterized in that: described inductor signal conditioning circuit comprises dividing potential drop capacitor C
divwith equivalent capacity C
induct, described dividing potential drop capacitor C
divbeing connected of one end and an electric field induction device, described dividing potential drop capacitor C
divother end ground connection, described equivalent capacity C
inductone end link with another electric field induction device, described equivalent capacity C
inductthe other end and dividing potential drop capacitor C
divone end connect;
Described dividing potential drop capacitor C
divmeet following relationship:
Wherein: V
inductthe induction electromotive force of-electric field induction device, unit is V;
V
sthe signal voltage of-voltage divider output, unit is V/m;
C
inductthe equivalent capacity of-electric field induction device, unit is mm;
C
div-dividing potential drop electric capacity, unit is pF.
6. transient electromagnetic pulse electrical field test instrument according to claim 5, is characterized in that: described balanced-unbalanced translation circuit comprises operational amplifier U3 and operational amplifier U4,
In-phase input end+IN1 of described operational amplifier U3 fetches the signal INDUCT-of self-induction signal conditioning circuit, described operational amplifier U3 inverting input-IN2 fetches the signal INDUCT+ of self-induction signal conditioning circuit, signal INDUCT-is by the first output terminal OUT1 output signal OUT-of operational amplifier U3 after operational amplifier U3 inter-process, and signal OUT-enters inverting input-IN of operational amplifier U4 by resistance R 3;
Signal INDUCT+ is OUT+ by the second output terminal OUT2 output signal of operational amplifier U3 after operational amplifier U3 inter-process, and signal OUT+ enters in-phase input end+IN of operational amplifier U4 by resistance R 5;
Differential signal OUT+, the OUT-of input are converted to single-ended signal OUT-4817 by operational amplifier U4, and single-ended signal OUT-4817 is exported by the output terminal of operational amplifier U4;
Two positive power source terminals (+Vs1 ,+Vs2) of described operational amplifier U3 all connect positive supply, and two negative power ends (Vs1 ,-Vs2) of described operational amplifier U3 all connect negative supply;
Described operational amplifier U4 positive power source terminal+Vs connects positive supply, and described operational amplifier U4 negative power end-Vs connects negative supply.
7. according to the transient electromagnetic pulse electrical field test instrument of claim 6, it is characterized in that: described balanced-unbalanced translation circuit also comprises anode input frequency response Circuit tuning and negative terminal input frequency response Circuit tuning, and signal INDUCT+ first inputted frequency response Circuit tuning through anode before entering operational amplifier U3; Signal INDUCT-is first through negative terminal input frequency response Circuit tuning before entering operational amplifier U3, and described negative terminal input frequency response Circuit tuning comprises resistance R 1, a termination signal INDUCT+ of described resistance R 1, the other end ground connection of described resistance R 1; Described anode input frequency response Circuit tuning comprises resistance R 2, a termination signal INDUCT-of described resistance R 2, the other end ground connection of described resistance R 2;
Also comprise electric source filter circuit, described electric source filter circuit comprises electric capacity, described electric capacity one end ground connection, and the other end is connected with power supply.
8. transient electromagnetic pulse electrical field test instrument according to claim 7, is characterized in that: described electro-optical conversion circuit comprises signal adaptation circuit, light stimulus device U7, working point regulating circuit:
Described signal adaptation circuit comprises capacitor C 14 and resistance R 12, and single-ended signal OUT-4817 inputs to one end of capacitor C 14, and the other end of described capacitor C 14 is connected with one end of resistance R 12, and the other end of described resistance R 12 is connected with the LDC end of light stimulus device U7;
Described working point regulating circuit comprises amplifier chip U5, voltage stabilizing chip U6, triode Q1 and peripheral circuit, and described amplifier chip U5 comprises the first transport and placing device and the second transport and placing device,
One end of the negative pole connecting resistance R10 of described voltage stabilizing chip U6, public termination-5V power supply of the negative pole of voltage stabilizing chip U6 and resistance R 10, a stiff end of the anodal connecting resistance RP1 of described voltage stabilizing chip U6, one end of the common port connecting resistance R9 of the positive pole of voltage stabilizing chip U6 and resistance R P1, another stiff end of the other end connecting resistance RP1 of resistance R 10, the other end ground connection of resistance R 9;
The sliding end of the first transport and placing device 1IN+ terminating resistor RP1 of described amplifier chip U5;
The 2IN+ end of the second transport and placing device of described amplifier chip U5 is connected with the common port of resistance R 9 and RP1 by resistance R 8, between the output terminal 2OUT of the second transport and placing device of amplifier chip U5 and the inverting input 2IN-of the second transport and placing device, be connected with capacitor C 12, the power end ground connection of the second transport and placing device of amplifier chip U5, the ground connection termination negative supply of the first transport and placing device;
The PDA signal of the PDA end output of described light stimulus device U7 inputs to the inverting input 2IN-of the second transport and placing device; After the PDA signal of the direct current biasing signal superimposed light driver U7 output of the 1OUT end output of the first transport and placing device, input to the inverting input of the second transport and placing device of amplifier chip U5, after the signal of the signal that the second transport and placing device of amplifier chip U5 is inputted 2IN+ end and the input of 2IN-end compares, from the 2OUT pin output TO-B signal of the second transport and placing device of amplifier chip U5, the base stage that TO-B signal enters triode Q1 through resistance R 13, diode D1;
The collector of described triode Q1 is connected to the other end of resistance R 12 by inductance L 1, resistance R 11, the emitter of described triode Q1 is connected with-5V power supply by resistance R 14;
The LDC pin of described light stimulus device U7, the electric signal that the input of LDA pin pin will be changed; Light signal after Out1 pin, the Out2 pin output conversion of light stimulus device U7; The optical signal power size of the PAD pin output monitor signal monitoring U7 output of light stimulus device U7.
9. according to the transient electromagnetic pulse electrical field test instrument of claim 1, it is characterized in that: described receiver comprises photoelectric conversion module, signal condition unit, display unit, signal output unit and receiver power supply,
Described photoelectric conversion module comprises optical receiver U8, and the anode of optical receiver U8 connects negative supply, the electric signal OUT-E after the negative electrode output photoelectric conversion of optical receiver U8, the earth terminal ground connection of optical receiver U8; The input end of optical receiver U8 is that LIN+ and input end LIN-connect light signal;
Described signal condition unit comprises one-level amplifying circuit and second amplifying circuit road, and one-level amplifying circuit comprises chip U9, and second amplifying circuit comprises chip U10;
The electric signal of optical receiver U8 output enters the inverting input IN-of chip U9 through resistance R 16, after the anti-phase amplification of chip U9, from the output terminal OUT output of amplifier chip U9, between the inverting input IN-of amplifier chip U9 and the output terminal OUT of amplifier chip U9, be connected with resistance R 17;
The signal of the output terminal OUT output of chip U9 enters the in-phase input end IN+ of amplifier chip U10 by shunt capacitance group C20, C21, output terminal OUT from chip U10 after amplifier chip U10 carries out homophase amplification exports, the inverting input IN-of amplifier chip U10 is by resistance R 22 ground connection, and the output terminal OUT of the inverting input IN-of chip U10 and amplifier chip U10 is connected with resistance R 23;
Positive power source terminal+Vs of amplifier chip U9 connects positive supply, negative power end-Vs of amplifier chip U9 connects negative supply, positive power source terminal+Vs of amplifier chip U10 connects positive supply, negative power end-Vs of amplifier chip U10 connects negative supply, also comprise electric source filter circuit, described electric source filter circuit comprises filter capacitor, described filter capacitor one end ground connection, a termination power.
10. transient electromagnetic pulse electrical field test instrument according to claim 9, it is characterized in that: described display unit comprises display driver circuit and display module, described display driver circuit is in-phase amplification circuit, described display driver circuit comprises chip U11 and peripheral circuit, the signal of the output terminal output of amplifier chip U9 enters the normal phase input end IN+ of chip U11 through inductance L 2, potentiometer RP2, output terminal from chip U11 after the homophase of chip U11 amplifies is exported
The in-phase input end IN+ of described chip U11 is connected with resistance R 19, the other end ground connection of resistance R 19, and the inverting input IN-of described chip U11 is connected with resistance R 18, the other end ground connection of described resistance R 18; The inverting input IN-of described chip U11 and the output terminal of chip U11 are connected with resistance R 20,
Described display module is DM series digit panel table.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320838739.0U CN203643515U (en) | 2013-12-18 | 2013-12-18 | Transient electromagnetic pulse electric field tester |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320838739.0U CN203643515U (en) | 2013-12-18 | 2013-12-18 | Transient electromagnetic pulse electric field tester |
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| CN203643515U true CN203643515U (en) | 2014-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320838739.0U Expired - Fee Related CN203643515U (en) | 2013-12-18 | 2013-12-18 | Transient electromagnetic pulse electric field tester |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698618A (en) * | 2013-12-18 | 2014-04-02 | 陕西海泰电子有限责任公司 | Transient electromagnetic pulse electric field tester |
| CN105824047A (en) * | 2015-01-07 | 2016-08-03 | 淮南矿业(集团)有限责任公司 | Transient electromagnetic advanced detection monitoring device and method |
| CN106645987A (en) * | 2016-11-30 | 2017-05-10 | 中国电力科学研究院 | System and method for measurement of transient state ground electric field |
| CN107037274A (en) * | 2016-11-21 | 2017-08-11 | 国网四川省电力公司电力科学研究院 | A kind of project of transmitting and converting electricity power-frequency electric field strength monitoring support |
-
2013
- 2013-12-18 CN CN201320838739.0U patent/CN203643515U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698618A (en) * | 2013-12-18 | 2014-04-02 | 陕西海泰电子有限责任公司 | Transient electromagnetic pulse electric field tester |
| CN103698618B (en) * | 2013-12-18 | 2016-08-17 | 陕西海泰电子有限责任公司 | transient electromagnetic pulse electric field tester |
| CN105824047A (en) * | 2015-01-07 | 2016-08-03 | 淮南矿业(集团)有限责任公司 | Transient electromagnetic advanced detection monitoring device and method |
| CN107037274A (en) * | 2016-11-21 | 2017-08-11 | 国网四川省电力公司电力科学研究院 | A kind of project of transmitting and converting electricity power-frequency electric field strength monitoring support |
| CN106645987A (en) * | 2016-11-30 | 2017-05-10 | 中国电力科学研究院 | System and method for measurement of transient state ground electric field |
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