CN108900166A - A kind of geophone sensitivity temperature-compensating adjusting circuit - Google Patents
A kind of geophone sensitivity temperature-compensating adjusting circuit Download PDFInfo
- Publication number
- CN108900166A CN108900166A CN201810972899.1A CN201810972899A CN108900166A CN 108900166 A CN108900166 A CN 108900166A CN 201810972899 A CN201810972899 A CN 201810972899A CN 108900166 A CN108900166 A CN 108900166A
- Authority
- CN
- China
- Prior art keywords
- temperature
- resistance
- circuit
- operational amplifier
- input terminal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000035945 sensitivity Effects 0.000 title claims abstract description 25
- 230000010355 oscillation Effects 0.000 claims abstract description 61
- 230000003321 amplification Effects 0.000 claims abstract description 55
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 55
- 230000005611 electricity Effects 0.000 claims description 6
- 230000003313 weakening effect Effects 0.000 abstract 1
- 239000000919 ceramic Substances 0.000 description 23
- 230000009466 transformation Effects 0.000 description 16
- 238000006243 chemical reaction Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 9
- 230000005662 electromechanics Effects 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000002596 correlated effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000013507 mapping Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000000747 cardiac effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
- H03F1/30—Modifications of amplifiers to reduce influence of variations of temperature or supply voltage or other physical parameters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/16—Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
- G01V1/18—Receiving elements, e.g. seismometer, geophone or torque detectors, for localised single point measurements
- G01V1/181—Geophones
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/447—Indexing scheme relating to amplifiers the amplifier being protected to temperature influence
Landscapes
- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Power Engineering (AREA)
- Acoustics & Sound (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Gyroscopes (AREA)
Abstract
The present invention provides a kind of geophone sensitivity temperature-compensatings to adjust circuit, including signal amplification circuit, signal amplification circuit amplifies the voltage output amplitude of machine core starting of oscillation unit in wave detector, and signal amplification circuit is connected with the temperature-compensation circuit for adjustment signal amplifying circuit gain.According to the requirement of wave detector output amplitude, reasonable signal amplification circuit is first selected, the output amplitude of wave detector is made to obtain preliminary gain, then reasonable temperature-compensation circuit is being connected on signal amplification circuit, the gain of wave detector is adjusted.The upper influence for weakening temperature for wave detector voltage output amplitude to greatest extent.When to parse to the output of wave detector, the real property on stratum can be accurately reacted.
Description
Technical field
The invention belongs to wave detectors to adjust field of circuit technology, and in particular to a kind of geophone sensitivity temperature-compensating adjusting
Circuit.
Background technique
In seismic survey system, wave detector undertakes the task that stratum shock wave is converted to electric signal output, from shake
The seismic wave that source generates is propagated to stratum depths, and the back wave with formation information is transmitted to surface geophone and is connect
By and carry out electromechanical transformation be electric signal, so the seismic wave weak signal that wave detector needs to receive to transmit stratum depths, this will
Wave detector is asked to have certain sensitivity.
It mainly include machine core starting of oscillation unit and signal processing circuit inside wave detector.Machine core starting of oscillation unit completes vibration signal
It is converted into electric signal, signal processing circuit completes impedance mapping function, enlarging function and signal arrangement function, and signal is exported
To subsequent acquisition station.The principle of machine core is from piezoelectricity replacement theory (or other electromechanical transformations are theoretical), due to machine core starting of oscillation list
Equivalent capacity C is affected by temperature larger in member, and same formation machine core starting of oscillation unit output amplitude is caused to vary with temperature and change.
And then signal processing circuit output amplitude is made also to vary with temperature and change.Geophone sensitivity (gain) parameter is resulted in this way
Change it is larger, cause wave detector integral performance parameter change it is larger, cause consistency and stability poor.
Summary of the invention
In order to solve the problems, such as exist under the prior art, by further improvement of existing technologies, according in wave detector
The voltage output amplitude variation with temperature trend of machine core starting of oscillation unit, first selection meet wave detector voltage output amplitude gain
Signal amplification circuit, then signal amplification circuit cut-in temperature compensation circuit, to the gain adjustment of signal amplification circuit, in turn
Geophone sensitivity is set to become relatively stable.
Foregoing invention purpose that the invention is realized by the following technical scheme.
A kind of geophone sensitivity temperature-compensating adjusting circuit, including signal amplification circuit, signal amplification circuit is to detection
The voltage output amplitude of machine core starting of oscillation unit amplifies in device, and signal amplification circuit is connected with for adjustment signal amplifying circuit
The temperature-compensation circuit of gain.
Further, temperature-compensation circuit includes the temperature-sensitive element that resistance value varies with temperature.
Further, temperature-sensitive element is thermistor R7, and temperature-compensation circuit, which may also include, to be connect with thermistor R7
Resistance R6.
Further, signal amplification circuit includes single ended signal amplifying circuit or both-end differential input signal amplification electricity
Road.
Further, single ended signal amplifying circuit mainly includes operational amplifier A1, resistance R1 and resistance R2；It is described
Operational amplifier A1 non-inverting input terminal receive machine core starting of oscillation unit voltage output, the inverting input terminal of operational amplifier A1
Resistance R1 is connected with output end, the inverting input terminal of operational amplifier A1 is connect with one end of resistance R2, the other end of resistance R2
Ground connection.
Further, temperature-compensation circuit is connected in series or in parallel with resistance R2.
Further, one end of temperature-compensation circuit is connected to the output end of operational amplifier A1, and the other end is connected to fortune
Calculate the inverting input terminal of amplifier A1.
Further, both-end differential input signal amplifying circuit includes operational amplifier A2, operational amplifier A3, resistance
R3, resistance R4 and resistance R5；The non-inverting input terminal of the operational amplifier A2 and the non-inverting input terminal of operational amplifier A3 connect
Pick the voltage output end of core starting of oscillation unit, and resistance R3, fortune are connected between the inverting input terminal and output end of operational amplifier A2
It calculates and connects resistance R5 between the inverting input terminal and output end of amplifier A3, the inverting input terminal of operational amplifier A2 passes through resistance
The inverting input terminal of R4 connection operational amplifier A3.
Further, temperature-compensation circuit be connected to operational amplifier A2 inverting input terminal and operational amplifier A3 it is anti-
Between phase input terminal.
Further, temperature-compensation circuit is connected between the inverting input terminal and output end of operational amplifier A2, temperature
Compensation circuit is connected between the inverting input terminal and output end of operational amplifier A3 simultaneously.
Compared with prior art, the present invention at least has the advantages that：
It is of the invention by the connection signal amplifying circuit on machine core starting of oscillation unit, to the voltage of machine core starting of oscillation unit output
Amplitude forms gain, and then temperature-compensating of the connection for the gain of adjustment signal amplifying circuit is electric on signal amplification circuit again
Road.Change when the voltage output amplitude of machine core starting of oscillation unit varies with temperature and forward or backwards, in signal amplification circuit to machine
After the reasonable gain of voltage output amplitude of core starting of oscillation unit, then again by temperature-compensation circuit, make the voltage for exporting wave detector
Output amplitude is reversed with temperature or forward direction is adjusted, and is offsetting the machine core starting of oscillation cell voltage output amplitude as caused by temperature change just
To or inverse change influence.And then wave detector output amplitude is made not vary with temperature and generate variation by a relatively large margin, into
And it is improved the sensitivity consistency of wave detector and stability.
Detailed description of the invention
Fig. 1 is schematic block circuit diagram of the invention；
Fig. 2 is the circuit diagram one under the single amplifier input mode of the present invention；
Fig. 3 is the circuit diagram two under the single amplifier input mode of the present invention；
Fig. 4 is the circuit diagram three under the single amplifier input mode of the present invention；
Fig. 5 is the circuit diagram four under the single amplifier input mode of the present invention；
Fig. 6 is the circuit diagram one under double operational input mode of the present invention；
Fig. 7 is the circuit diagram two under double operational input mode of the present invention；
Fig. 8 is the circuit diagram three under double operational input mode of the present invention；
Fig. 9 is the circuit diagram four under double operational input mode of the present invention；
Figure 10 is the Sensitivity comparison figure before and after wave detector increase geophone sensitivity temperature-compensating adjusting circuit.
Specific embodiment
Below with reference to attached drawing, the present invention is described in detail：
As shown in Figure 1, the present invention includes signal amplification circuit 1, signal amplification circuit 1 is to machine core starting of oscillation unit in wave detector
Voltage output amplitude amplify, signal amplification circuit 1 is connected with the temperature-compensating for 1 gain of adjustment signal amplifying circuit
Circuit 2.
It should be noted that mainly including machine core starting of oscillation unit and signal processing unit, machine core starting of oscillation unit in wave detector
It completes vibration signal and is converted into electric signal, signal processing circuit completes impedance mapping function, enlarging function and signal arrangement function,
And signal is exported to subsequent acquisition station.The voltage output end of machine core starting of oscillation unit is connect with the input terminal of signal amplification circuit 1.
It should be further noted that the principle of machine core starting of oscillation unit (or other electromechanical turns from piezoelectricity replacement theory
Change theory), cardiac component is piezoelectric ceramic wafer, and the electromechanical conversion efficiency of most piezoelectric ceramic wafer becomes with temperature
Change and reversely change, machine core starting of oscillation cell voltage output amplitude is caused to vary with temperature and reversely change.Thus in order to guarantee to examine
The consistency and stability of wave device output sensitivity, it is necessary to which signal processing unit is in positive to the gain of output amplitude and temperature
Pass relationship makes the output amplitude of wave detector vary with temperature realization in maximum and stablizes output.But when machine core unit
Electromechanical transformation efficiency varies with temperature and when positive change, at this time just should gain of the selection signal processing unit to output amplitude
It is in reversed correlativity with temperature.
The correlativity between gain and temperature in order to realize above-mentioned signal processing unit output amplitude.Signal processing
Unit includes realizing the signal amplification circuit 1 that gain is carried out to machine core starting of oscillation unit output amplitude, and put for adjustment signal
The temperature-compensation circuit 2 of 1 gain of big circuit.The gain of signal amplification circuit 1 itself and temperature are without correlativity in the present invention；
Thus in the present invention need that the gain of signal amplification circuit 1 is adjusted by temperature-compensation circuit 2；When machine core starting of oscillation unit
In piezoelectric ceramics electromechanical transformation efficiency vary with temperature and substantially inverse change, signal amplification circuit 1 should connect can be with
Make gain and the positively related temperature-compensation circuit 2 of temperature of signal amplification circuit 1；And then realize signal processing unit gain with
Temperature is positively correlated；When the electromechanical transformation efficiency of the piezoelectric ceramics in machine core starting of oscillation unit vary with temperature and substantially positive change,
Signal amplification circuit 1 should connect the temperature-compensation circuit 2 of the gain and temperature negative correlation that can make signal amplification circuit 1；Into
And realize that the gain of signal processing unit and temperature are negatively correlated；
Further, as shown in Figure 1, temperature-compensation circuit 2 includes the temperature-sensitive element that resistance value varies with temperature.
To above-mentioned it should be noted that because temperature-compensation circuit 2 adjusts the gain with temperature of signal amplification circuit 1
Section, and temperature-compensation circuit 2 is mainly adjusted by the resistance value of adjustment signal amplifying circuit 1.Thus, in temperature-compensation circuit
It then must include the temperature-sensitive element that resistance value can change with the variation of temperature in 2.
Further, above-mentioned technical proposal being further detailed, temperature-sensitive element selects thermistor R7, meanwhile,
Temperature-compensation circuit 2 further includes the resistance R6 connecting with thermistor R7, and choosing suitable R6 can be obtained suitable compensation dynamics.
To it is above-mentioned it should be noted that temperature-sensitive element can choose arbitrarily vary with temperature and the temperature-sensitive element that changes,
In comprising use thermistor R7, although in temperature-compensation circuit 21 only be used only thermistor R7, thermistor R7
The gain of signal amplification circuit 1 can be adjusted, but when 1 output amplitude of signal amplification circuit realizes certain sensitivity
When, then the susceptibility requirement varied with temperature to the resistance value of thermistor R7 is very stringent.Thus we need in thermistor
On the basis of R7, increase resistance R6, rationally adjust temperature-compensating dynamics, realizes thermistor to 1 gain of signal amplification circuit
It advanced optimizes.When the resistance value of thermistor vary with temperature amplitude it is larger or smaller when, then can choose increase and reduce electricity
Resistance R6 connects with thermistor R7, to slow down or enhance the amplitude of variation of temperature-compensation circuit resistance value.
To above-mentioned thermistor it should be noted that the electromechanical transformation when the piezoelectric ceramic wafer in machine core starting of oscillation unit is imitated
Rate varies with temperature and reversely changes, and machine core starting of oscillation cell voltage output amplitude is caused to vary with temperature and reversely change.At this time
The thermistor of selection should be realized and change to machine core starting of oscillation unit output amplitude gain with the forward direction of temperature；When machine core starting of oscillation list
The electromechanical conversion efficiency of piezoelectric ceramic wafer in member varies with temperature and positive change, and machine core starting of oscillation cell voltage is caused to export
Amplitude varies with temperature and positive change.The thermistor selected at this time should be realized to machine core starting of oscillation unit output amplitude gain
With the reversed change of temperature；To guarantee the consistency of wave detector output sensitivity.
Further, signal amplification circuit 1 includes that single ended signal amplifying circuit 1 or both-end differential input signal amplify
Circuit 1.
To above-mentioned it should be noted that selecting the single ended signal amplification of single amplifier in selection signal amplifying circuit 1
The both-end differential input signal amplifier of device or double operational；It, can be poor using single amplifier for single ended signal amplifier
Divide the single-ended input mode over the ground of input mode or single amplifier.
For above-mentioned further instruction, single ended signal amplifying circuit 1 or both-end differential input signal amplifying circuit
1, it can choose the signal amplification circuit 1 including in-phase negative feedback amplifier or reverse phase reversed feedback amplifier；Signal amplification electricity
When connecting identical amplifier and other assemblies on road 1, when using in-phase negative feedback amplifier, amplifier input impedance is larger,
And when using reverse phase reversed feedback amplifier, amplifier input impedance is smaller, it is contemplated that the capacitive feature of machine core unit, input impedance
The too small receiving that will affect low-frequency information, therefore, in order to pursue the broadband properties of entire circuit, preferential selection uses in-phase negative
Feedback amplifier.
Selection for signal amplification circuit 1 and temperature-compensation circuit 2, it should first test out piezoelectricity in machine core starting of oscillation unit
The ceramic output amplitude of (or other electromechanical transformation devices) and the particularly relevant relationship of temperature, the width exported is needed according to wave detector
Size is spent, selects suitable signal amplification circuit 1 first, preliminary gain is carried out to the voltage output amplitude of machine core starting of oscillation unit,
Then it goes to reasonably select temperature-compensation circuit 2, and then the further gain of adjustment signal amplifying circuit 1；Play temperature to machine core
The influence for unit output amplitude of shaking, the influence with temperature to signal amplification circuit 1 reach neutralization；And then wave detector can be made to export
Amplitude can resist temperature change.Namely wave detector output sensitivity keeps relative constant.
Embodiment 1
As shown in Fig. 2, single ended signal amplifying circuit 1 includes operational amplifier A1, and include resistance R1 and resistance
The negative-feedback circuit of R2, and in-phase negative feedback amplifier is used in signal amplification circuit 1；The non-inverting input terminal of operational amplifier A1
The voltage output end of machine core starting of oscillation unit is connected, the inverting input terminal of operational amplifier A1 connects resistance R1, operation with output end
The inverting input terminal of amplifier A1 is connect with one end of resistance R2, the other end ground connection of resistance R2.Thermistor R7 and resistance R6
After connection, then with resistance R2 be connected in series.
To above-mentioned it should be noted that when the electromechanical transformation efficiency of the piezoelectric ceramics in machine core starting of oscillation unit varies with temperature
And substantially inverse change, thermistor R7 select thermistor NTC.When the electromechanics conversion of the piezoelectric ceramics in machine core starting of oscillation unit
Efficiency varies with temperature and substantially positive change, thermistor R7 select thermistor PTC.
In turn, resistance R6 connects with thermistor R7, gain B1 of the temperature-compensation circuit 2 to signal amplification circuit 1
=1+R1/ (R2+R6+R7).
The above-mentioned calculation formula for gain B1 is the intrinsic calculation of single ended input amplifier, herein no longer
It repeats.
Embodiment 2
As shown in figure 3, single ended signal amplifying circuit 1 includes operational amplifier A1, and include resistance R1 and resistance
The negative-feedback circuit of R2, and in-phase negative feedback amplifier is used in signal amplification circuit 1；The non-inverting input terminal of operational amplifier A1
The voltage output end of machine core starting of oscillation unit is connected, the inverting input terminal of operational amplifier A1 connects resistance R1, operation with output end
The inverting input terminal of amplifier A1 is connect with one end of resistance R2, the other end ground connection of resistance R2.Thermistor R7 and resistance R6
After connection, then with resistance R1 be connected in series.
To above-mentioned it should be noted that when the electromechanical transformation efficiency of the piezoelectric ceramics in machine core starting of oscillation unit varies with temperature
And substantially inverse change, thermistor R7 select thermistor R7 to select thermistor PTC.Piezoelectricity in machine core starting of oscillation unit
The electromechanical transformation efficiency of ceramics varies with temperature and substantially positive change, thermistor R7 select thermistor R7 selection temperature-sensitive electricity
Hinder NTC.
In turn, resistance R6 connects with thermistor R7, gain B2=1+ of the temperature-compensation circuit 2 to signal amplification circuit 1
(R1+R6+R7)/R2。
The above-mentioned calculation formula for gain B2 is the intrinsic calculation of single ended input amplifier, herein no longer
It repeats.
Embodiment 3
As shown in figure 4, single ended signal amplifying circuit 1 includes operational amplifier A1, and include resistance R1 and resistance
The negative-feedback circuit of R2, and in-phase negative feedback amplifier is used in signal amplification circuit 1；The non-inverting input terminal of operational amplifier A1
The voltage output end of machine core starting of oscillation unit is connected, the inverting input terminal of operational amplifier A1 connects resistance R1, operation with output end
The inverting input terminal of amplifier A1 is connect with one end of resistance R2, the other end ground connection of resistance R2.Temperature-compensation circuit 2 and resistance
R2 is connected in parallel.
To above-mentioned it should be noted that when the electromechanical transformation efficiency of the piezoelectric ceramics in machine core starting of oscillation unit varies with temperature
And substantially inverse change, thermistor R7 select thermistor NTC.When the electromechanics conversion of the piezoelectric ceramics in machine core starting of oscillation unit
Efficiency varies with temperature and substantially positive change, thermistor R7 select thermistor PTC.
It is that resistance R6 connects with thermistor R7, and temperature-compensation circuit 2 puts signal to above-mentioned further explanation
After the gain B3=1+R1/ [R2//(R6+R7)] of big circuit 1, R2//(R6+R7) indicate that resistance R6 connects with thermistor R7,
The equivalent resistance in parallel with R2 progress again.
The above-mentioned calculation formula for gain B3 is the intrinsic calculation of single ended input amplifier, herein no longer
It repeats.
Embodiment 4
As shown in figure 5, single ended signal amplifying circuit 1 includes operational amplifier A1, and include resistance R1 and resistance
The negative-feedback circuit of R2, and in-phase negative feedback amplifier is used in signal amplification circuit 1；The non-inverting input terminal of operational amplifier A1
The voltage output end of machine core starting of oscillation unit is connected, the inverting input terminal of operational amplifier A1 connects resistance R1, operation with output end
The inverting input terminal of amplifier A1 is connect with one end of resistance R2, the other end ground connection of resistance R2.Temperature-compensation circuit 2 and resistance
R1 is connected in parallel.
To above-mentioned it should be noted that when the electromechanical transformation efficiency of the piezoelectric ceramics in machine core starting of oscillation unit varies with temperature
And substantially inverse change, thermistor R7 select thermistor PTC.When the electromechanics conversion of the piezoelectric ceramics in machine core starting of oscillation unit
Efficiency varies with temperature and substantially positive change, thermistor R7 select thermistor NTC.
It is that resistance R6 connects with thermistor R7, and temperature-compensation circuit 2 puts signal to above-mentioned further explanation
Gain B4=1+ [R1//(R6+R7)]/R2 of big circuit 1.After R1//(R6+R7) indicates that resistance R6 connects with thermistor R7,
The equivalent resistance in parallel with R1 progress again.
The above-mentioned calculation formula for gain B4 is the intrinsic calculation of single ended input amplifier, herein no longer
It repeats.
Embodiment 5
As shown in fig. 6, both-end differential input signal amplifying circuit 1 include operational amplifier A2, operational amplifier A3 and
Negative-feedback circuit comprising resistance R3, resistance R4 and resistance R5, and in-phase negative feedback amplifier is used in signal amplification circuit 1；
The non-inverting input terminal of operational amplifier A2 connects the voltage output of machine core starting of oscillation unit with the non-inverting input terminal of operational amplifier A3
End, between the inverting input terminal and output end of operational amplifier A2 connect resistance R3, the inverting input terminal of operational amplifier A3 and
Resistance R5 is connected between output end, the inverting input terminal of operational amplifier A2 passes through the reverse phase of resistance R4 connection operational amplifier A3
Input terminal.Temperature-compensation circuit 2 is connected between the inverting input terminal of amplifier A2 and the inverting input terminal of operational amplifier A3,
Realization temperature-compensation circuit 2 is connected with resistance R4's.
To above-mentioned it should be noted that when the electromechanical transformation efficiency of the piezoelectric ceramics in machine core starting of oscillation unit varies with temperature
And substantially inverse change, thermistor R7 select thermistor NTC；When the electromechanics conversion of the piezoelectric ceramics in machine core starting of oscillation unit
Efficiency varies with temperature and substantially positive change, thermistor R7 select thermistor PTC.
It is to take R3=R5 to above-mentioned further explanation, resistance R6 connects with thermistor R7；At this point, temperature is mended
Circuit 2 is repaid to gain B5=1+R3/ (R4+R6+R7)+R5/ (R4+R6+R7)=1+2R3/ (R4+R6+ of signal amplification circuit 1
R7)。
The above-mentioned calculation formula for gain B5 is the intrinsic calculation of double-width grinding amplifier, herein no longer
It repeats.
Embodiment 6
As shown in figure 4, both-end differential input signal amplifying circuit 1 include operational amplifier A2, operational amplifier A3 and
Negative-feedback circuit comprising resistance R3, resistance R4 and resistance R5, and in-phase negative feedback amplifier is used in signal amplification circuit 1；
The non-inverting input terminal of operational amplifier A2 connects the voltage output of machine core starting of oscillation unit with the non-inverting input terminal of operational amplifier A3
End, between the inverting input terminal and output end of operational amplifier A2 connect resistance R3, the inverting input terminal of operational amplifier A3 and
Resistance R5 is connected between output end, the inverting input terminal of operational amplifier A2 passes through the reverse phase of resistance R4 connection operational amplifier A3
Input terminal.Temperature-compensation circuit 2 is identical two sets, between a set of inverting input terminal for being connected to amplifier A2 and input terminal,
Realization temperature-compensation circuit 2 is connected with resistance R3's.Between the another set of inverting input terminal for being connected to amplifier A3 and input terminal,
Realization temperature-compensation circuit 2 is connected with resistance R5's.
To above-mentioned it should be noted that when the electromechanical transformation efficiency of the piezoelectric ceramics in machine core starting of oscillation unit varies with temperature
And substantially inverse change, thermistor R7 select thermistor PTC；When the electromechanics conversion of the piezoelectric ceramics in machine core starting of oscillation unit
Efficiency varies with temperature and substantially positive change, thermistor R7 select thermistor NTC.
It is to take R3=R5 to above-mentioned further explanation, when selection resistance R6 connects with thermistor R7, at this point,
Gain B6=1+ (R3+R6+R7)/R4+ (R5+R6+R7)/R4=1+2 (R3+ of the temperature-compensation circuit 2 to signal amplification circuit 1
R6+R7)/R4。
The above-mentioned calculation formula for gain B6 is the intrinsic calculation of both-end differential input amplifier, herein
It repeats no more.
Embodiment 7
As shown in figure 8, double-width grinding signal amplification circuit 1 include operational amplifier A2, operational amplifier A3 and comprising
The negative-feedback circuit of resistance R3, resistance R4 and resistance R5, and in-phase negative feedback amplifier is used in signal amplification circuit 1；Operation
The non-inverting input terminal of amplifier A2 connects the voltage output end of machine core starting of oscillation unit with the non-inverting input terminal of operational amplifier A3, fortune
It calculates and connects resistance R3, the inverting input terminal and output end of operational amplifier A3 between the inverting input terminal and output end of amplifier A2
Between connect resistance R5, the inverting input terminal of operational amplifier A2 passes through the anti-phase input of resistance R4 connection operational amplifier A3
End.Temperature-compensation circuit 2 is connected between the inverting input terminal of amplifier A2 and the inverting input terminal of operational amplifier A3, is realized
Temperature-compensation circuit 2 is in parallel with resistance R4's.
To above-mentioned it should be noted that when the electromechanical transformation efficiency of the piezoelectric ceramics in machine core starting of oscillation unit varies with temperature
And substantially inverse change, thermistor R7 select thermistor NTC；When the electromechanics conversion of the piezoelectric ceramics in machine core starting of oscillation unit
Efficiency varies with temperature and substantially positive change, thermistor R7 select thermistor PTC.
It is to take R3=R5 to above-mentioned further explanation, resistance R6 connects with thermistor R7；At this point, temperature is mended
Circuit 2 is repaid to gain B7=1+R3/ [R4//(R6+R7)]+R5/ [R4//(R6+R7)]=1+2R3/ of signal amplification circuit 1
[R4//(R6+R7)]；After R4//(R6+R7) indicates that resistance R6 connects with thermistor R7, then with the concatenated equivalent electricity of R4 progress
Resistance.
The above-mentioned calculation formula for gain B7 is the intrinsic calculation of double-width grinding amplifier, herein no longer
It repeats.
Embodiment 8
As shown in figure 9, double-width grinding signal amplification circuit 1 include operational amplifier A2, operational amplifier A3 and comprising
The negative-feedback circuit of resistance R3, resistance R4 and resistance R5, and in-phase negative feedback amplifier is used in signal amplification circuit 1；Operation
The non-inverting input terminal of amplifier A2 connects the voltage output end of machine core starting of oscillation unit with the non-inverting input terminal of operational amplifier A3, fortune
It calculates and connects resistance R3, the inverting input terminal and output end of operational amplifier A3 between the inverting input terminal and output end of amplifier A2
Between connect resistance R5, the inverting input terminal of operational amplifier A2 passes through the anti-phase input of resistance R4 connection operational amplifier A3
End.Temperature-compensation circuit 2 is identical two sets, between a set of inverting input terminal for being connected to amplifier A2 and input terminal, is realized
Temperature-compensation circuit 2 is in parallel with resistance R3's.Between the another set of inverting input terminal for being connected to amplifier A3 and input terminal, realize
Temperature-compensation circuit 2 is in parallel with resistance R5's.
To above-mentioned it should be noted that when the electromechanical transformation efficiency of the piezoelectric ceramics in machine core starting of oscillation unit varies with temperature
And substantially inverse change, thermistor R7 select thermistor PTC；When the electromechanics conversion of the piezoelectric ceramics in machine core starting of oscillation unit
Efficiency varies with temperature and substantially positive change, thermistor R7 select thermistor NTC.
It is to take R3=R5 to above-mentioned further explanation, resistance R6 connects with thermistor R7；At this point, temperature is mended
Repay circuit 2 to gain B8=1+ [R3//(R6+R7)]/R4+ [R5//(R6+R7)]/R4=1+2 of signal amplification circuit 1 [R3//
(R6+R7)]/R4；After R3//(R6+R7) indicates that resistance R6 connects with thermistor R7, then with the concatenated equivalent resistance of R3 progress.
The above-mentioned calculation formula for gain B8 is the intrinsic calculation of double-width grinding amplifier, herein no longer
It repeats.
As shown in Figure 10, reversely change when causing machine core starting of oscillation cell voltage output amplitude to vary with temperature.Dot
Line chart represents after machine core starting of oscillation unit is added to fixed gain, wave detector output amplitude variation with temperature；The broken line of box
Figure represents after machine core starting of oscillation unit is added to fixed gain, then carries out after further adjusting to fixed gain, and wave detector exports width
Spend variation with temperature.The former with the latter is compared, it can be seen that the output amplitude variation with temperature of the wave detector of the latter,
Amplitude of variation is smaller, and the voltage output amplitude of wave detector is made to obtain stablizing output.
The above embodiments are merely examples for clarifying the description, and does not limit the embodiments.For institute
For the those of ordinary skill in category field, other various forms of variations or change can also be made on the basis of the above description
It is dynamic.There is no necessity and possibility to exhaust all the enbodiments.And obvious variation extended from this or change
It is dynamic to be still in the protection scope of this invention.
Claims (10)
1. a kind of geophone sensitivity temperature-compensating adjusts circuit, which is characterized in that including signal amplification circuit (1), signal is put
Big circuit (1) amplifies the voltage output amplitude of machine core starting of oscillation unit in wave detector, and signal amplification circuit (1) connection is useful
In the temperature-compensation circuit (2) of adjustment signal amplifying circuit (1) gain.
2. a kind of geophone sensitivity temperature-compensating according to claim 1 adjusts circuit, which is characterized in that the temperature
Degree compensation circuit (2) includes the temperature-sensitive element that resistance value varies with temperature.
3. a kind of geophone sensitivity temperature-compensating according to claim 2 adjusts circuit, which is characterized in that the heat
Quick element is thermistor R7, and the temperature-compensation circuit (2) further includes the resistance R6 being connected in series with thermistor R7.
4. a kind of geophone sensitivity temperature-compensating according to claim 3 adjusts circuit, which is characterized in that the letter
Number amplifying circuit (1) includes single ended signal amplifying circuit or both-end differential input signal amplifying circuit.
5. a kind of geophone sensitivity temperature-compensating according to claim 4 adjusts circuit, which is characterized in that the list
Holding input signal amplifying circuit includes operational amplifier A1, resistance R1 and resistance R2；The operational amplifier A1's is same mutually defeated
Enter the voltage output end of end connection machine core starting of oscillation unit；One end of the inverting input terminal connection resistance R1 of operational amplifier A1, electricity
Hinder the output end of R1 other end connection operational amplifier A1；The inverting input terminal of operational amplifier A1 and one end of resistance R2 connect
It connects, the other end ground connection of resistance R2.
6. a kind of geophone sensitivity temperature-compensating according to claim 5 adjusts circuit, which is characterized in that the temperature
Degree compensation circuit (2) is connected in series or in parallel with resistance R2.
7. a kind of geophone sensitivity temperature-compensating according to claim 5 adjusts circuit, which is characterized in that the temperature
One end of degree compensation circuit (2) is connected to the output end of operational amplifier A1, and the other end is connected to the reverse phase of operational amplifier A1
Input terminal.
8. a kind of geophone sensitivity temperature-compensating according to claim 4 adjusts circuit, which is characterized in that described is double
Holding differential input signal amplifying circuit includes operational amplifier A2, operational amplifier A3, resistance R3, resistance R4 and resistance R5；Institute
The non-inverting input terminal of the operational amplifier A2 stated and the non-inverting input terminal of operational amplifier A3 are separately connected machine core starting of oscillation unit
Voltage output end；The other end connection operation of one end of the inverting input terminal connection resistance R3 of operational amplifier A2, resistance R3 is put
The output end of big device A2；One end of the inverting input terminal connection resistance R5 of operational amplifier A3, the other end of resistance R5 connect fortune
Calculate the output end of amplifier A3；The inverting input terminal of operational amplifier A2 is defeated by the reverse phase of resistance R4 connection operational amplifier A3
Enter end.
9. a kind of geophone sensitivity temperature-compensating according to claim 8 adjusts circuit, which is characterized in that the temperature
Degree compensation circuit (2) is connected between the inverting input terminal of operational amplifier A2 and the inverting input terminal of operational amplifier A3.
10. a kind of geophone sensitivity temperature-compensating according to claim 8 adjusts circuit, which is characterized in that described
Temperature-compensation circuit (2) is two sets, between a set of inverting input terminal for being connected to operational amplifier A2 and output end.Another set of company
It connects between the inverting input terminal and output end of operational amplifier A3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810972899.1A CN108900166A (en) | 2018-08-24 | 2018-08-24 | A kind of geophone sensitivity temperature-compensating adjusting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810972899.1A CN108900166A (en) | 2018-08-24 | 2018-08-24 | A kind of geophone sensitivity temperature-compensating adjusting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108900166A true CN108900166A (en) | 2018-11-27 |
Family
ID=64358325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810972899.1A Pending CN108900166A (en) | 2018-08-24 | 2018-08-24 | A kind of geophone sensitivity temperature-compensating adjusting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108900166A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109525334A (en) * | 2018-12-19 | 2019-03-26 | 南京米乐为微电子科技有限公司 | A kind of wideband logarithmic detector of high dynamic range |
| CN110007338A (en) * | 2019-04-13 | 2019-07-12 | 胜利油田新胜石油物探技术服务有限责任公司 | A kind of piezoelectric seismometer signal conditioning circuit |
| CN114089249A (en) * | 2021-11-26 | 2022-02-25 | 广东美的暖通设备有限公司 | Filter circuit, eddy current sensor, debugging method and debugging device |
| CN114325047A (en) * | 2021-12-24 | 2022-04-12 | 北京东方计量测试研究所 | Current detection compensation circuit and device for resistor shunt |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003017947A (en) * | 2001-07-03 | 2003-01-17 | Sharp Corp | Temperature compensation circuit and communication terminal provided with the same |
| CN201251467Y (en) * | 2008-06-20 | 2009-06-03 | 宝山钢铁股份有限公司 | Anti-interference unit for eddy current sensor |
| CN201583956U (en) * | 2009-09-25 | 2010-09-15 | 上海大学 | Proportional temperature deviation function generator and temperature compensator thereof |
| CN203166871U (en) * | 2013-01-24 | 2013-08-28 | 江汉大学 | Improved atomic frequency standard servo system |
| CN203534701U (en) * | 2013-10-30 | 2014-04-09 | 成都市宏山科技有限公司 | Illumination detection circuit having temperature compensation function |
| CN104935282A (en) * | 2015-05-27 | 2015-09-23 | 西安空间无线电技术研究所 | Digital-analog combined gain temperature compensating circuit for travelling-wave tube amplifier |
| CN106375000A (en) * | 2016-08-30 | 2017-02-01 | 西安空间无线电技术研究所 | Spatial light reception demodulation device |
| CN208904967U (en) * | 2018-08-24 | 2019-05-24 | 西安陆海地球物理科技有限公司 | A kind of geophone sensitivity temperature-compensating adjusting circuit |
-
2018
- 2018-08-24 CN CN201810972899.1A patent/CN108900166A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003017947A (en) * | 2001-07-03 | 2003-01-17 | Sharp Corp | Temperature compensation circuit and communication terminal provided with the same |
| CN201251467Y (en) * | 2008-06-20 | 2009-06-03 | 宝山钢铁股份有限公司 | Anti-interference unit for eddy current sensor |
| CN201583956U (en) * | 2009-09-25 | 2010-09-15 | 上海大学 | Proportional temperature deviation function generator and temperature compensator thereof |
| CN203166871U (en) * | 2013-01-24 | 2013-08-28 | 江汉大学 | Improved atomic frequency standard servo system |
| CN203534701U (en) * | 2013-10-30 | 2014-04-09 | 成都市宏山科技有限公司 | Illumination detection circuit having temperature compensation function |
| CN104935282A (en) * | 2015-05-27 | 2015-09-23 | 西安空间无线电技术研究所 | Digital-analog combined gain temperature compensating circuit for travelling-wave tube amplifier |
| CN106375000A (en) * | 2016-08-30 | 2017-02-01 | 西安空间无线电技术研究所 | Spatial light reception demodulation device |
| CN208904967U (en) * | 2018-08-24 | 2019-05-24 | 西安陆海地球物理科技有限公司 | A kind of geophone sensitivity temperature-compensating adjusting circuit |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109525334A (en) * | 2018-12-19 | 2019-03-26 | 南京米乐为微电子科技有限公司 | A kind of wideband logarithmic detector of high dynamic range |
| CN109525334B (en) * | 2018-12-19 | 2023-10-13 | 南京米乐为微电子科技有限公司 | Broadband logarithmic detector with high dynamic range |
| CN110007338A (en) * | 2019-04-13 | 2019-07-12 | 胜利油田新胜石油物探技术服务有限责任公司 | A kind of piezoelectric seismometer signal conditioning circuit |
| CN114089249A (en) * | 2021-11-26 | 2022-02-25 | 广东美的暖通设备有限公司 | Filter circuit, eddy current sensor, debugging method and debugging device |
| CN114089249B (en) * | 2021-11-26 | 2024-05-28 | 广东美的暖通设备有限公司 | Filter circuit, eddy current sensor, debugging method and debugging device |
| CN114325047A (en) * | 2021-12-24 | 2022-04-12 | 北京东方计量测试研究所 | Current detection compensation circuit and device for resistor shunt |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108900166A (en) | A kind of geophone sensitivity temperature-compensating adjusting circuit | |
| CN110100178B (en) | Fluid flow rate measurement device and related method | |
| CN105190325B (en) | Resonance impedance sensing based on controlled negative impedance | |
| JP2015525872A5 (en) | ||
| CN113295359B (en) | Simulation test device for inhibiting ejector supporting plate vibration and vibration inhibition method | |
| CN101517381A (en) | Apparatus having a unit which is capable of mechanical oscillation and is intended to determine and/or monitor a process variable of a medium | |
| CN103858014A (en) | Readout circuit for self-balancing capacitor bridge | |
| CN101694156B (en) | Dipole acoustic small-signal processing unit | |
| CN208904967U (en) | A kind of geophone sensitivity temperature-compensating adjusting circuit | |
| CN102801100B (en) | Device for improving output frequency stability of laser and laser with device | |
| CN111751774A (en) | Wheatstone bridge-based weak signal anti-interference detection processing method and device | |
| CN102435859A (en) | Small capacitance measurement circuit based on AC (alternating current) voltage drop balance and measurement method | |
| CN108768310A (en) | A kind of low-noise charge amplifier and its implementation for piezoelectric transducer | |
| CN108700901A (en) | Vibration control apparatus | |
| Yang et al. | Investigation on behavior of the vibration-based piezoelectric energy harvester array in ultracapacitor charging | |
| CN108183689A (en) | Quartz vibration beam accelerometer oscillating circuit and its adjustment method | |
| CN109307883B (en) | Low-frequency temperature compensation regulating circuit of detector | |
| CN102694523A (en) | Crystal oscillation circuit | |
| CN109188509B (en) | Detector low-frequency compensation circuit, pre-amplification circuit and detector circuit thereof | |
| CN106849940A (en) | A kind of frequency deviation controls crystal oscillating circuit | |
| CN108019199B (en) | Transmitting circuit for array induction | |
| CN206650638U (en) | A kind of high broadband of tunnel knot paraller resistanc method is without self-excitation pre-amplification circuit | |
| CN115629268B (en) | Method and system for testing crystal parameters of tuning fork quartz resonator | |
| CN214669460U (en) | Integrated circuit electromagnetic interference immunity performance detection device | |
| CN214372678U (en) | Pre-processing circuit for precession flowmeter and double-probe precession flowmeter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |