CN106374894A - Signal processing system with adjustable frequency bandwidth for flue gas temperature alarm device - Google Patents
Signal processing system with adjustable frequency bandwidth for flue gas temperature alarm device Download PDFInfo
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- CN106374894A CN106374894A CN201610739631.4A CN201610739631A CN106374894A CN 106374894 A CN106374894 A CN 106374894A CN 201610739631 A CN201610739631 A CN 201610739631A CN 106374894 A CN106374894 A CN 106374894A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
- F27D21/04—Arrangements of indicators or alarms
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K7/00—Modulating pulses with a continuously-variable modulating signal
- H03K7/10—Combined modulation, e.g. rate modulation and amplitude modulation
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- General Engineering & Computer Science (AREA)
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Abstract
The invention discloses a signal processing system with an adjustable frequency bandwidth for a flue gas temperature alarm device. The signal processing system is mainly composed of a processing chip U, a triode VT2, a polar capacitor C7, a resistor R8, a diode D3, a frequency bandwidth adjusting circuit serially connected between a COM pin and an FDBK pin of the processing chip U, a signal reception low pass filter circuit separately connected with a base of the triode VT2 and a VC pin of the processing chip U, and a frequency error correction circuit connected with the processing chip U. The signal processing system disclosed by the invention can inhibit or eliminate useless signals among the signals, as well as adjust the phases and frequency errors of output signals, so that the output signals are kept stable, and thus the signal processing accuracy of the signal processing system disclosed by the invention is improved, and the alarm accuracy of the temperature alarm device is ensured when the flue gas temperature of a carbon roasting furnace is too high.
Description
Technical field
The present invention relates to a kind of signal processing system, specifically refer to a kind of flue-gas temperature alarm device frequency bandwidth adjustable
Type signal processing system.
Background technology
Carbon baking furnace is usually used petroleum coke and Colophonium does raw material, and at high operating temperatures, calcination department completes vibration
The raw baking carbon blocks of molding become qualified ripe carbon block.Raw carbon block temperature in roasting process is 200-1200 DEG C, and this process discharges
Substantial amounts of baking flue gas, baking furnace fume main component is glance coal, tar and various combustible dust, and flue gas exit temperature is up to
900℃.At high temperature, these flue gases must discharge flue in time, otherwise easily overheated burning, or even sets off an explosion.Work at present
Factory, in order to prevent the temperature in flue too high and accidents caused, is just mounted with temperature alarming device in factory.Institute of factory now
Using temperature alarming device how to be made up of temperature sensor, signal processing system, controller, display and alarm, this
Can accurately be reported to the police when temperature in flue for the temperature alarming device is too high, be depended primarily on signal processing system energy
No signal is effectively processed.
However, the signal processing system of existing carbon baking furnace flue-gas temperature alarm device is to the treatment effect of signal not
Good, lead to temperature alarming device can not timely be reported to the police in flue-gas temperature superelevation, cause the staff can not be timely
High-temperature flue gas are discharged flue, so that staff can not timely discharge dangerous situation.
Therefore it provides a kind of carbon baking furnace flue-gas temperature alarm device signal processing that can improve signal processing effect
System is the task of top priority.
Content of the invention
It is an object of the invention to overcoming the signal processing system pair of existing carbon baking furnace flue-gas temperature alarm device
The not good defect of the treatment effect of signal, provides a kind of flue-gas temperature alarm device frequency bandwidth adjustable type signal processing system
System.
To achieve these goals, the scheme that the present invention adopts is as follows: a kind of flue-gas temperature alarm device frequency bandwidth
Adjustable type signal processing system, mainly by process chip u, audion vt2, positive pole is connected with the base stage of audion vt2, negative pole
The polar capacitor c7 being connected with the gneg pin of process chip u after inductance l2, the vinp pin phase of one end and process chip u
Connect, the resistance r9 that is connected with the base stage of audion vt2 of the other end, one end is connected with the colelctor electrode of audion vt2, another
The resistance r8 of end ground connection, n pole is connected with the com pin of process chip u, p pole is connected with the emitter stage of audion vt2 two
Pole pipe d3, is serially connected in the frequency bandwidth adjustment circuit between the com pin of process chip u and fdbk pin, respectively with audion
The signal that the base stage of vt2 is connected with the vc pin of process chip u receives low-pass filter circuit, and is connected with process chip u
The correction of frequency errors circuit composition connecing；The vc pin of described process chip u is connected with outside 12v DC source.
Described frequency bandwidth adjustment circuit by amplifier p3, amplifier p4, audion vt4, positive pole after resistance r19 with put
The polar capacitor c14 that the positive pole of big device p3 is connected, negative pole is connected with the com pin of process chip u, positive pole is through resistance r21
Be connected with the rear positive pole with polar capacitor c14 afterwards, the polar capacitor c15 of minus earth, p pole is connected with the positive pole of amplifier p3
Connect, diode d7 that n pole is connected with the emitter stage of audion vt4 after resistance r17, the base stage phase of positive pole and audion vt4
The polar capacitor c13 that connection, negative pole are connected with the outfan of amplifier p3, n pole collection with audion vt4 after resistance r18
The diode d8 that electrode is connected, p pole is connected with the outfan of amplifier p3 after resistance r20, positive pole after resistance r23 with
The negative pole of amplifier p4 is connected, the polar capacitor c17 of minus earth, p pole is connected with the positive pole of polar capacitor c17, n pole with
The diode d10 that the negative pole of polar capacitor c17 is connected, positive pole is connected with the outfan of amplifier p4, negative pole is through resistance r25
The polar capacitor c16 being connected with the positive pole of amplifier p4 afterwards, one end is connected with the outfan of amplifier p4, other end ground connection
Adjustable resistance r24, and p pole be connected with the negative pole of amplifier p3 after resistance r22, the regulation of n pole and adjustable resistance r24
Hold the diode d9 composition being connected；The p pole of described diode d8 is also connected with the positive pole of polar capacitor c17；Described amplification
The outfan of device p4 is connected with the fdbk pin of process chip u.
Further, described signal receives low-pass filter circuit by amplifier p1, audion vt1, and positive pole is after resistance r3
Be connected with the positive pole of amplifier p1, negative pole as signal receive low-pass filter circuit input polar capacitor c3, positive pole
Be connected with the negative pole of polar capacitor c3 after resistance r4, the polar capacitor c5 of minus earth, the positive pole phase of n pole and amplifier p1
Diode d1, negative pole and diode that connection, p pole are sequentially connected with the outfan of amplifier p1 after resistance r2 through inductance l1
The n pole of d1 be connected after ground connection, the polar capacitor c1 that is connected with the base stage of audion vt1 after resistance r1 of positive pole, positive pole with
The emitter stage of audion vt1 is connected, the polar capacitor c2 of minus earth, and negative pole is connected with the negative pole of amplifier p1, positive pole
The polar capacitor c6 being sequentially connected with the outfan of amplifier p1 after resistance r5 through resistance r6, positive pole is defeated with amplifier p1's
Go out end be connected, polar capacitor c4 that negative pole is connected with the base stage of audion vt2, and after p electrode resistance r7 with amplifier p1
Negative pole be connected, diode d2 that n pole is connected with the junction point of resistance r6 and resistance r5 composition；Described audion vt1's
Emitter stage is also connected with the vc pin of process chip u, its colelctor electrode is connected with the junction point of resistance r2 with inductance l1.
Described correction of frequency errors electricity routing amplifier p2, field effect transistor mos, audion vt3, n pole is with amplifier p2's
The diode d5 that positive pole is connected, p pole is connected with the vneg pin of process chip u, positive pole after resistance r13 with process chip
The polar capacitor c12 that the fdbk of u is connected, negative pole is connected with the negative pole of amplifier p2 after resistance r14, n pole is through resistance r15
Be connected with the base stage of audion vt3 afterwards, diode d6 that p pole is connected with the negative pole of amplifier p2, one end and audion vt3
Colelctor electrode be connected, the resistance r16 of other end ground connection, positive pole is connected with the outfan of amplifier p2, negative pole and audion
The polar capacitor c11 that the emitter stage of vt3 is connected, positive pole is connected with the vout pin of process chip u, negative pole and field effect transistor
The polar capacitor c9 that the grid of mos is connected, the p pole sequentially vpos pin phase with process chip u after resistance r11 and inductance l3
The diode d4 that connection, n pole are connected with the negative pole of polar capacitor c11, positive pole is connected with the p pole of diode d4, negative pole warp
The polar capacitor c10 being connected with the negative pole of polar capacitor c11 after adjustable resistance r12, and the leakage of negative pole and field effect transistor mos
The polar capacitor c8 composition that pole is connected, positive pole is connected with the n pole of diode d4 after resistance r10；Described field effect transistor mos
Drain electrode be also connected with the junction point of inductance l3 with resistance r11, its source electrode is connected with the positive pole of amplifier p2；Described amplification
The negative pole of device p2 is grounded after being also connected with the gnd pin of process chip u；The negative pole of described polar capacitor c11 is as frequency by mistake
The outfan of difference correcting circuit.
In order to ensure the practical effect of the present invention, described process chip u then preferentially employs ad603 integrated chip
To realize.
The present invention compared with prior art, has advantages below and a beneficial effect:
(1) present invention is not only simple in structure with low cost, and signal can accurately be processed, make carbon baking furnace
Temperature alarming device can be reported to the police immediately in flue-gas temperature superelevation, that is, ensure that staff may timely process dangerous situation, because
This can prevent flue gas overheated and burn and cause fire, or even the danger of blast occurs it is ensured that the production of carbon baking furnace
Safety.
(2) present invention can be suppressed to the garbage signal in signal or be eliminated, and the present invention can also be to output signal
Phase and frequency error be adjusted, make output signal keep stable, thus it is accurate to signal processing to improve the present invention
Property it is ensured that temperature alarming device the too high alarm of carbon baking furnace flue-gas temperature accuracy.
(3) present invention can be adjusted to the frequency bandwidth of input signal, make the collective frequency of signal more steady, make letter
Number frequency remains stationary state, effectively ensure that process chip u to input process when signal integrity and
Reliability.
(4) present invention effectively raises the accuracy to signal processing, makes temperature alarming device in carbon baking furnace cigarette
Temperature spends the warning that Gao Shineng carries out promptly and accurately, and the high-temperature flue gas of carbon baking furnace can timely be discharged, can be effectively
Decrease carbon baking furnace to work under superelevation temperature state, thus the present invention can effectively extend the use longevity of carbon baking furnace
Life.
Brief description
Fig. 1 is the overall structure diagram of the present invention.
Fig. 2 is the electrical block diagram of the frequency bandwidth adjustment circuit of the present invention.
Specific embodiment
With reference to embodiment, the present invention is described in further detail, but embodiments of the present invention not limited to this.
Embodiment
As shown in figure 1, the present invention is mainly by process chip u, audion vt2, resistance r8, resistance r9, polar capacitor c7, two
Pole pipe d3, inductance l2, frequency bandwidth adjustment circuit, signal receives low-pass filter circuit, and correction of frequency errors circuit composition.
During connection, the positive pole of polar capacitor c7 is connected with the base stage of audion vt2, negative pole after inductance l2 with process core
The gneg pin of piece u is connected.One end of resistance r9 is connected with the vinp pin of process chip u, the other end and audion vt2
Base stage be connected.One end of resistance r8 is connected with the colelctor electrode of audion vt2, and the other end is grounded.The n pole of diode d3 with
The com pin of process chip u is connected, and p pole is connected with the emitter stage of audion vt2.Frequency bandwidth adjustment circuit is serially connected in
Between the com pin of process chip u and fdbk pin.Signal receive low-pass filter circuit respectively with the base stage of audion vt2 and
The vc pin of process chip u is connected.Correction of frequency errors circuit is connected with process chip u.The vc pipe of described process chip u
Foot is connected with outside 12v DC source.
During enforcement, the audion vt2 of the present invention, inductance l2, polar capacitor c7, resistance r8, resistance r9 and diode d3 shape
The demagnetizer becoming, this demagnetizer can effectively eliminate or suppress Electromagnetic Interference signal in signal, make signal more steadily it is ensured that
Process chip u can receive accurate signal, thus improve the accuracy to signal processing for the present invention.Meanwhile, described letter
The input of number wave reception filtering circuit is then connected with the output stage of the temperature sensor of temperature alarming device, and this signal receives filter
The temperature signal that wave circuit is used for that temperature sensor is transmitted is analyzed processing.Described correction of frequency errors circuit defeated
Go out end to be then connected with the controller of temperature alarming device, this controller be then the signal that transmitted according to signal processing system Lai
Alarm is controlled.In order to ensure the practical effect of the present invention, described process chip u then preferentially employs
Ad603 integrated chip is realizing.
Further, described signal receives low-pass filter circuit by amplifier p1, audion vt1, resistance r1, resistance r2,
Resistance r3, resistance r4, resistance r5, resistance r6, resistance r7, polar capacitor c1, polar capacitor c2, polar capacitor c3, polar capacitor
C4, polar capacitor c5, polar capacitor c6, diode d1, diode d2, and inductance l1 form.
During connection, the positive pole of polar capacitor c3 is connected with the positive pole of amplifier p1 after resistance r3, and negative pole is as signal
Receive the input of low-pass filter circuit and be connected with the output stage of temperature sensor.The positive pole of polar capacitor c5 is through resistance r4
It is connected with the negative pole of polar capacitor c3 afterwards, minus earth.The n pole of diode d1 is connected with the positive pole of amplifier p1, and p is extremely suitable
Secondary it is connected with the outfan of amplifier p1 after resistance r2 through inductance l1.
Wherein, after the negative pole of polar capacitor c1 is connected with the n pole of diode d1 be grounded, positive pole after resistance r1 with three poles
The base stage of pipe vt1 is connected.The positive pole of polar capacitor c2 is connected with the emitter stage of audion vt1, minus earth.Polar capacitor
The negative pole of c6 is connected with the negative pole of amplifier p1, the positive pole sequentially outfan phase with amplifier p1 after resistance r6 and resistance r5
Connect.
Meanwhile, the positive pole of polar capacitor c4 is connected with the outfan of amplifier p1, the base stage phase of negative pole and audion vt2
Connect.It is connected with the negative pole of amplifier p1 after p electrode resistance r7 of diode d2, the junction point of n pole and resistance r6 and resistance r5
It is connected.The emitter stage of described audion vt1 is also connected with the vc pin of process chip u, its colelctor electrode and inductance l1 and electricity
The junction point of resistance r2 is connected.Polar capacitor c1 in this circuit, polar capacitor c3 and polar capacitor c5 as filter capacitor, and
Polar capacitor c3 and polar capacitor c5 forms the first filter；And amplifier p1, diode d1, inductance l1, polar capacitor c6 and
The amplifier that diode d2 is formed.
Further, described correction of frequency errors electricity routing amplifier p2, field effect transistor mos, audion vt3, resistance
R10, resistance r11, adjustable resistance r12, resistance r13, resistance r14, resistance r15, resistance r16, polar capacitor c8, polar capacitor
C9, polar capacitor c10, polar capacitor c11, polar capacitor c12, diode d4, diode d5, diode d6. and inductance l3
Composition.
During connection, the n pole of diode d5 is connected with the positive pole of amplifier p2, the vneg pin phase of p pole and process chip u
Connect.The positive pole of polar capacitor c12 is connected with the fdbk of process chip u after resistance r13, negative pole after resistance r14 with put
The negative pole of big device p2 is connected.The n pole of diode d6 is connected with the base stage of audion vt3 after resistance r15, p pole and amplification
The negative pole of device p2 is connected.
Wherein, one end of resistance r16 is connected with the colelctor electrode of audion vt3, and the other end is grounded.Polar capacitor c11's
Positive pole is connected with the outfan of amplifier p2, and negative pole is connected with the emitter stage of audion vt3.The positive pole of polar capacitor c9 with
The vout pin of process chip u is connected, and negative pole is connected with the grid of field effect transistor mos.The p pole of diode d4 is sequentially through electricity
Resistance r11 is connected with the vpos pin with process chip u after inductance l3, and n pole is connected with the negative pole of polar capacitor c11.
Meanwhile, the positive pole of polar capacitor c10 is connected with the p pole of diode d4, negative pole after adjustable resistance r12 with polarity
The negative pole of electric capacity c11 is connected.The negative pole of polar capacitor c8 is connected with the drain electrode of field effect transistor mos, and positive pole is after resistance r10
It is connected with the n pole of diode d4.
The drain electrode of described field effect transistor mos is also connected with the junction point of inductance l3 with resistance r11, its source electrode and amplifier
The positive pole of p2 is connected；The negative pole of described amplifier p2 is grounded after being also connected with the gnd pin of process chip u；Described polarity
The negative pole of electric capacity c11 is as the outfan of correction of frequency errors circuit and the controller signals input phase with temperature alarming device
Connect.And the amplifier p2 in this circuit, field effect transistor mos, adjustable resistance r12 and polar capacitor c11 define actuator, should
Actuator is used for the phase and frequency of signal is modified.
As shown in Fig. 2 described frequency bandwidth adjustment circuit is by amplifier p3, amplifier p4, audion vt4, resistance r17,
Resistance r18, resistance r19, resistance r20, resistance r21, resistance r22, resistance r23, adjustable resistance r24, resistance r25, polar capacitor
C13, polar capacitor c14, polar capacitor c15, polar capacitor c16, polar capacitor c17, diode d7, diode d8, diode
D9, and diode d10 composition.
During connection, the positive pole of polar capacitor c14 is connected with the positive pole of amplifier p3 after resistance r19, negative pole and process
The com pin of chip u is connected.The positive pole of polar capacitor c15 after resistance r21 with after be connected with the positive pole of polar capacitor c14
Connect, minus earth.The p pole of diode d7 is connected with the positive pole of amplifier p3, n pole after resistance r17 with audion vt4 send out
Emitter-base bandgap grading is connected.
Wherein, the positive pole of polar capacitor c13 is connected with the base stage of audion vt4, the outfan of negative pole and amplifier p3
It is connected.The n pole of diode d8 is connected with the colelctor electrode of audion vt4 after resistance r18, p pole after resistance r20 with amplification
The outfan of device p3 is connected.The positive pole of polar capacitor c17 is connected with the negative pole of amplifier p4 after resistance r23, and negative pole connects
Ground.The p pole of diode d10 is connected with the positive pole of polar capacitor c17, and n pole is connected with the negative pole of polar capacitor c17.
Meanwhile, the positive pole of polar capacitor c16 is connected with the outfan of amplifier p4, negative pole after resistance r25 with amplification
The positive pole of device p4 is connected.One end of adjustable resistance r24 is connected with the outfan of amplifier p4, and the other end is grounded.Diode
The p pole of d9 is connected with the negative pole of amplifier p3 after resistance r22, and n pole is connected with the adjustable side of adjustable resistance r24.Described
The p pole of diode d8 is also connected with the positive pole of polar capacitor c17；The outfan of described amplifier p4 and process chip u
Fdbk pin is connected.
During operation, the polar capacitor c1 of the signal wave reception filtering circuit of the present invention, polar capacitor c3 and polar capacitor c5 make
For filter capacitor, and polar capacitor c3 and polar capacitor c5 forms the first filter, and this first filter can effectively will input
The stronger interference signal of signal in end signal is eliminated, and then passes through by amplifier p1, diode through pre-filtered signal
The amplifier that the element such as d1 and polar capacitor c6 is formed carries out signal frequency point and is amplified, and makes the intensity enhancing of signal, and signal
Enhanced signal is filtered again through the polar capacitor c4 as filter capacitor again, and the interference signal in signal is had
The elimination of effect, makes signal more steady and carries out through resistance r9 being transferred to process chip u after choked flow.This process chip u is entered to signal
Digital signal is converted a signal into, this digital signal is finally by correction of frequency errors circuit to digital signal after row analyzing and processing
Phase and frequency error be adjusted, that is, pass through amplifier p2 in circuit, field effect transistor mos, adjustable resistance r12 and polarity
The actuator that electric capacity c11 is formed, to realize the phase and frequency error in digital signal is adjusted, makes output signal keep
Stable, thus the present invention accurately can be processed to signal it is ensured that temperature alarming device is in carbon baking furnace flue-gas temperature
The accuracy of too high alarm.
Wherein, the present invention, in order to improve process chip u when processing to input signal, can make the overall frequency of signal
Keep stable, be then provided with frequency bandwidth adjustment circuit between the com pin and fdbk pin of process chip u.This frequency band
Amplifier p3 in wide adjustment circuit, audion vt4, diode d7, diode d8, polar capacitor c13, polar capacitor c14, pole
Property the resonator that formed of electric capacity c15 and diode d9, this resonator can eliminate unnecessary radio-frequency component in signal, make signal more
Totally.And the amplifier p4 in frequency bandwidth adjustment circuit, adjustable resistance r24, polar capacitor c16, polar capacitor c17 and two poles
The frequency band adjustments device that pipe d10 is formed, this frequency band adjustments device can be adjusted to the frequency bandwidth of signal, effectively raises signal
Intensity, make signal more stable, thus this frequency bandwidth adjustment circuit effectively ensure that process chip u to input
The integrity of signal during reason and reliability, further improve the accuracy to signal processing for the present invention.
Meanwhile, the present invention effectively raises the accuracy to signal processing, makes temperature alarming device in carbon baking furnace
Warning promptly and accurately can be carried out, the high-temperature flue gas of carbon baking furnace can timely be discharged, can be effective when flue-gas temperature is too high
The carbon baking furnace that decreases work under superelevation temperature state, thus the present invention can effectively extend the use longevity of carbon baking furnace
Life.
As described above, just can preferably realize the present invention.
Claims (5)
1. a kind of flue-gas temperature alarm device frequency bandwidth adjustable type signal processing system, mainly by process chip u, audion
Vt2, the pole that positive pole is connected with the base stage of audion vt2, negative pole is connected with the gneg pin of process chip u after inductance l2
Property electric capacity c7, the resistance that one end is connected with the vinp pin of process chip u, the other end is connected with the base stage of audion vt2
R9, one end is connected with the colelctor electrode of audion vt2, the resistance r8 of other end ground connection, the com pin phase of n pole and process chip u
The diode d3 that connection, p pole are connected with the emitter stage of audion vt2, is serially connected in the com pin of process chip u and fdbk manages
Frequency bandwidth adjustment circuit between foot, the signal being connected with the base stage of audion vt2 and the vc pin of process chip u respectively
Receive low-pass filter circuit, and the correction of frequency errors circuit composition being connected with process chip u；Described process chip u
Vc pin is connected with outside 12v DC source.
2. a kind of flue-gas temperature alarm device frequency bandwidth adjustable type signal processing system according to claim 1, its
Be characterised by: described frequency bandwidth adjustment circuit by amplifier p3, amplifier p4, audion vt4, positive pole after resistance r19 with
The polar capacitor c14 that the positive pole of amplifier p3 is connected, negative pole is connected with the com pin of process chip u, positive pole is through resistance
Be connected with the rear positive pole with polar capacitor c14 after r21, the polar capacitor c15 of minus earth, the positive pole of p pole and amplifier p3
Be connected, diode d7 that n pole is connected with the emitter stage of audion vt4 after resistance r17, the base of positive pole and audion vt4
The polar capacitor c13 that pole is connected, negative pole is connected with the outfan of amplifier p3, n pole after resistance r18 with audion vt4
Colelctor electrode be connected, diode d8 that p pole is connected with the outfan of amplifier p3 after resistance r20, positive pole is through resistance r23
Be connected with the negative pole of amplifier p4 afterwards, the polar capacitor c17 of minus earth, p pole is connected with the positive pole of polar capacitor c17, n
The diode d10 that pole is connected with the negative pole of polar capacitor c17, positive pole is connected with the outfan of amplifier p4, negative pole is through electricity
The polar capacitor c16 that is connected with the positive pole of amplifier p4 after resistance r25, one end is connected with the outfan of amplifier p4, another
The adjustable resistance r24 of end ground connection, and p pole be connected with the negative pole of amplifier p3 after resistance r22, n pole and adjustable resistance r24
Adjustable side be connected diode d9 composition；The p pole of described diode d8 is also connected with the positive pole of polar capacitor c17；Institute
The fdbk pin of the outfan and process chip u of stating amplifier p4 is connected.
3. a kind of flue-gas temperature alarm device frequency bandwidth adjustable type signal processing system according to claim 2, its
Be characterised by: described signal receives low-pass filter circuit by amplifier p1, audion vt1, positive pole after resistance r3 with amplifier
The positive pole of p1 is connected, the polar capacitor c3 of the input as signal reception low-pass filter circuit for the negative pole, and positive pole is through resistance r4
Be connected with the negative pole of polar capacitor c3 afterwards, the polar capacitor c5 of minus earth, n pole is connected with the positive pole of amplifier p1, p pole
The n pole of the diode d1 being sequentially connected with the outfan of amplifier p1 after resistance r2 through inductance l1, negative pole and diode d1
Polar capacitor c1, positive pole and audion that after being connected, ground connection, positive pole are connected with the base stage of audion vt1 after resistance r1
The emitter stage of vt1 is connected, the polar capacitor c2 of minus earth, and negative pole is connected with the negative pole of amplifier p1, positive pole sequentially warp
The resistance r6 and polar capacitor c6 being connected with the outfan of amplifier p1 after resistance r5, the outfan phase of positive pole and amplifier p1
The polar capacitor c4 that connection, negative pole are connected with the base stage of audion vt2, and the negative pole with amplifier p1 after p electrode resistance r7
Be connected, diode d2 that n pole is connected with the junction point of resistance r6 and resistance r5 composition；The emitter stage of described audion vt1
Also it is connected with the vc pin of process chip u, its colelctor electrode is connected with the junction point of resistance r2 with inductance l1.
4. a kind of flue-gas temperature alarm device frequency bandwidth adjustable type signal processing system according to claim 3, its
It is characterised by: described correction of frequency errors electricity routing amplifier p2, field effect transistor mos, audion vt3, n pole is with amplifier p2's
The diode d5 that positive pole is connected, p pole is connected with the vneg pin of process chip u, positive pole after resistance r13 with process chip
The polar capacitor c12 that the fdbk of u is connected, negative pole is connected with the negative pole of amplifier p2 after resistance r14, n pole is through resistance r15
Be connected with the base stage of audion vt3 afterwards, diode d6 that p pole is connected with the negative pole of amplifier p2, one end and audion vt3
Colelctor electrode be connected, the resistance r16 of other end ground connection, positive pole is connected with the outfan of amplifier p2, negative pole and audion
The polar capacitor c11 that the emitter stage of vt3 is connected, positive pole is connected with the vout pin of process chip u, negative pole and field effect transistor
The polar capacitor c9 that the grid of mos is connected, the p pole sequentially vpos pin phase with process chip u after resistance r11 and inductance l3
The diode d4 that connection, n pole are connected with the negative pole of polar capacitor c11, positive pole is connected with the p pole of diode d4, negative pole warp
The polar capacitor c10 being connected with the negative pole of polar capacitor c11 after adjustable resistance r12, and the leakage of negative pole and field effect transistor mos
The polar capacitor c8 composition that pole is connected, positive pole is connected with the n pole of diode d4 after resistance r10；Described field effect transistor mos
Drain electrode be also connected with the junction point of inductance l3 with resistance r11, its source electrode is connected with the positive pole of amplifier p2；Described amplification
The negative pole of device p2 is grounded after being also connected with the gnd pin of process chip u；The negative pole of described polar capacitor c11 is as frequency by mistake
The outfan of difference correcting circuit.
5. a kind of flue-gas temperature alarm device frequency bandwidth adjustable type signal processing system according to claim 4, its
It is characterised by: described process chip u is ad603 integrated chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610739631.4A CN106374894A (en) | 2016-08-27 | 2016-08-27 | Signal processing system with adjustable frequency bandwidth for flue gas temperature alarm device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610739631.4A CN106374894A (en) | 2016-08-27 | 2016-08-27 | Signal processing system with adjustable frequency bandwidth for flue gas temperature alarm device |
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| CN106374894A true CN106374894A (en) | 2017-02-01 |
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| CN201610739631.4A Withdrawn CN106374894A (en) | 2016-08-27 | 2016-08-27 | Signal processing system with adjustable frequency bandwidth for flue gas temperature alarm device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110133206A (en) * | 2019-06-19 | 2019-08-16 | 金陵科技学院 | A kind of multi-parameter combined type water monitoring device and detection method |
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2016
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110133206A (en) * | 2019-06-19 | 2019-08-16 | 金陵科技学院 | A kind of multi-parameter combined type water monitoring device and detection method |
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