CN106297153A - A kind of flue-gas temperature alarm device many circuit adjustment type signal processing system - Google Patents
A kind of flue-gas temperature alarm device many circuit adjustment type signal processing system Download PDFInfo
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- CN106297153A CN106297153A CN201610742714.9A CN201610742714A CN106297153A CN 106297153 A CN106297153 A CN 106297153A CN 201610742714 A CN201610742714 A CN 201610742714A CN 106297153 A CN106297153 A CN 106297153A
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/06—Electric actuation of the alarm, e.g. using a thermally-operated switch
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
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Abstract
The invention discloses a kind of flue-gas temperature alarm device many circuit adjustment type signal processing system, mainly by processing chip U, audion VT2, resistance R9, diode D3, the voltage follower circuit being connected with the base stage of audion VT2, the signal that VC pin with voltage follower circuit and process chip U is connected respectively receives low-pass filter circuit, the correction of frequency errors circuit being connected with process chip U, and the Resistance and Capacitance Coupled Amplification Circuit composition being serially connected between correction of frequency errors circuit and the VNEG pin processing chip U.Garbage signal in signal can be suppressed or eliminate by the present invention, and the phase and frequency error of output signal can also be adjusted by the present invention, output signal is made to keep stable, thus improve the present invention accuracy to signal processing, it is ensured that temperature alarming device is at the accuracy of the too high alarm of carbon baking furnace flue-gas temperature.
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 many circuit adjustment type
Signal processing system.
Background technology
Carbon baking furnace generally uses petroleum coke and Colophonium to do raw material, and at high operating temperatures, calcination department completes vibration
The raw baking carbon blocks of molding becomes 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, the easiest overheated burning in time, 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
The temperature alarming device of employing is many to be made up of temperature sensor, signal processing system, controller, display and alarm, this
Can report to the police accurately when temperature alarming device temperature in flue is too high, depend primarily on signal processing system energy
No signal is effectively processed.
But, the signal processing system of existing carbon baking furnace flue-gas temperature alarm device is to the treatment effect of signal not
Good, cause temperature alarming device can not report to the police timely when flue-gas temperature superelevation, cause the staff can not be timely
High-temperature flue gas is discharged flue, so that staff can not discharge dangerous situation timely.
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.
Summary of the invention
It is an object of the invention to overcome the signal processing system pair of existing carbon baking furnace flue-gas temperature alarm device
The defect that the treatment effect of signal is the best, it is provided that a kind of flue-gas temperature alarm device many circuit adjustment type signal processing system.
To achieve these goals, the scheme that the present invention uses is as follows:
A kind of flue-gas temperature alarm device many circuit adjustment type signal processing system, mainly by processing 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 processing chip U after inductance L2
Property electric capacity C7, one end and process chip U the resistance that VINP pin is connected, the other end is connected with the base stage of audion VT2
R9, one end is connected with the colelctor electrode of audion VT2, resistance R8, the N pole of other end ground connection and process chip U COM pin phase
The diode D3 that connection, P pole are connected with the emitter stage of audion VT2, the voltage follow being connected with the base stage of audion VT2
Circuit, the signal that the VC pin with voltage follower circuit and process chip U is connected respectively receives low-pass filter circuit, with process
The correction of frequency errors circuit that chip U is connected, and it is serially connected in correction of frequency errors circuit and the VNEG pin processing chip U
Between Resistance and Capacitance Coupled Amplification Circuit composition；The VC pin of described process chip U is connected with outside 12V DC source.
Further, described Resistance and Capacitance Coupled Amplification Circuit is by the base of audion VT6, audion VT7, P pole and audion VT6
The diode D10 that pole is connected, N pole is connected with the VNEG pin processing chip U, one end is extremely connected with the N of diode D10
Connect, the resistance R33 of other end ground connection, positive pole colelctor electrode with audion VT6 after resistance R30 is connected, negative pole is through resistance R29
Polar capacitor C17, the P pole that base stage with audion VT6 is connected afterwards is connected with the positive pole of polar capacitor C17, N pole is through resistance
The diode D9 that after R28, colelctor electrode with audion VT7 is connected, positive pole is connected with the colelctor electrode of audion VT6, negative pole warp
The polar capacitor C20 that after inductance L5, base stage with audion VT7 is connected, positive pole negative with polar capacitor C20 after resistance R31
The polar capacitor C18 that pole is connected, negative pole is connected with the colelctor electrode of audion VT7, the colelctor electrode phase of positive pole and audion VT7
Connect, polar capacitor C19, the N pole that is connected with correction of frequency errors circuit of negative pole after resistance R32 with polar capacitor C19's
The diode D11 that negative pole is connected, P pole is connected with the emitter stage of audion VT7, with pole after plus earth adjustable resistance R35
The polar capacitor C21, Yi Jiyi of ground connection after the negative pole of property electric capacity C20 is connected, negative pole is connected with the emitter stage of audion VT7
End is connected with the emitter stage of audion VT6, the resistance R34 of other end ground connection composition；The negative pole of described polar capacitor C17 connects
Ground.
Described voltage follower circuit by amplifier P3, audion VT4, audion VT5, the positive pole phase of one end and amplifier P4
Connect, the resistance R23 that is connected with signal wave reception filtering circuit of the other end, positive pole after resistance R25 with the negative pole of amplifier P4
Be connected, the polar capacitor C16 of minus earth, negative pole is connected with the base stage of audion VT5, positive pole after resistance R24 with put
Polar capacitor C15 that the outfan of big device P4 is connected, one end is connected with the positive pole of polar capacitor C15, other end ground connection
Resistance R26, one end is connected with the colelctor electrode colelctor electrode of audion VT5, the resistance R27 of other end ground connection, and negative pole is through resistance R20
The polar capacitor C14 that outfan with amplifier P3 is connected afterwards, positive pole positive pole with amplifier P4 after inductance L4 is connected,
The diode that P pole is connected with the negative pole of polar capacitor C14, N pole emitter stage with audion VT5 after resistance R22 is connected
D8, resistance R21, the P pole that one end is connected with the positive pole of amplifier P3, the other end is connected with the emitter stage of audion VT5 with
The diode D7 that the emitter stage of audion VT4 is connected, N pole negative pole with amplifier P3 after adjustable resistance R19 is connected, just
Pole polar capacitor C13 that base stage is connected, negative pole is connected with the negative pole of amplifier P3 with audion VT4 after resistance R17,
And the resistance R18 composition that one end is connected with the base stage of audion VT4, the other end is connected with the positive pole of polar capacitor C14；
The grounded collector of described audion VT4；The emitter stage of described audion VT5 is connected with the base stage of audion VT2.
Further, described signal reception low-pass filter circuit is by amplifier P1, audion VT1, and positive pole is after resistance R3
Be connected with the positive pole of amplifier P1, negative pole receives the polar capacitor C3 of input of low-pass filter circuit as signal, positive pole
After resistance R4 the negative pole with polar capacitor C3 be connected, the positive pole phase of polar capacitor C5, the N pole of minus earth and amplifier P1
Connect, diode D1 that P pole is sequentially connected through inductance L1 outfan with amplifier P1 after resistance R2, negative pole and diode
The N pole of D1 be connected after the polar capacitor C1 that is connected of ground connection, positive pole base stage with audion VT1 after resistance R1, 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 through resistance R6 outfan with amplifier P1 after resistance R5, positive pole is defeated with amplifier P1's
Go out the polar capacitor C4 that end is connected, negative pole is connected, and P electrode resistance R7 with positive pole with amplifier P4 after resistance R23
The diode D2 composition that negative pole with amplifier P1 is connected afterwards, N pole is connected with the junction point of resistance R6 and resistance R5；Described
The emitter stage of audion VT1 is also connected with the VC pin processing chip U, the junction point of its colelctor electrode and inductance L1 and resistance R2
It is connected.
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 negative pole of polar capacitor C19, positive pole after resistance R13 with process chip U
Polar capacitor C12, the N pole that FDBK is connected, negative pole negative pole with amplifier P2 after resistance R14 is connected through resistance R15
The diode D6 that base stage with audion VT3 is connected afterwards, 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 processing chip U, negative pole and field effect transistor
Polar capacitor C9, the P pole that the grid of MOS is connected sequentially after resistance R11 and inductance L3 with process chip U VPOS pin phase
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 that after adjustable resistance R12, negative pole with polar capacitor C11 is connected, 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 also junction point with resistance R11 with inductance L3 be connected, its source electrode is connected with the positive pole of amplifier P2；Described amplification
The negative pole of device P2 also with process chip U GND pin be connected after ground connection；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 the most preferentially have employed the integrated chip of AD603
Realize.
The present invention compared with prior art, has the following advantages and beneficial effect:
(1) present invention is not only simple in structure with low cost, and can process signal accurately, makes carbon baking furnace
Temperature alarming device can be reported to the police immediately when flue-gas temperature superelevation, i.e. ensure that staff may process dangerous situation timely, because of
This can prevent flue gas overheated and burns and cause fire, the danger of blast even occurs, it is ensured that the production of carbon baking furnace
Safety.
(2) garbage signal in signal can be suppressed or eliminate by the present invention, and the present invention can also be to output signal
Phase and frequency error be adjusted, make output signal keep stable, thus improve accurate to signal processing of the present invention
Property, it is ensured that temperature alarming device is at the accuracy of the too high alarm of carbon baking furnace flue-gas temperature.
(3) present invention can carry out multistage amplification to the signal of output, can be by the signal level of output signal and signal frequency
It is adjusted to the level with input signal and signal frequency is consistent, make the intensity of signal be maintained at more than 1mV, thus improve this
The bright accuracy to signal processing.
(4) present invention can make signal keep stable to input signal being adjusted by the frequency before changing, it is ensured that this
The invention precision to signal conversion processes.
(5) present invention effectively raises the accuracy to signal processing, makes temperature alarming device at carbon baking furnace cigarette
Can carry out warning promptly and accurately when temperature is too high, the high-temperature flue gas of carbon baking furnace can be discharged timely, can be effective
Decrease carbon baking furnace to work under superhigh temperature state, thus the present invention can effectively extend the use longevity of carbon baking furnace
Life.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention.
Fig. 2 is the electrical block diagram of the voltage follower circuit of the present invention.
Fig. 3 is the electrical block diagram of the Resistance and Capacitance Coupled Amplification Circuit of the present invention.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment
As it is shown in figure 1, the present invention is mainly by processing chip U, audion VT2, resistance R8, resistance R9, polar capacitor C7, two
Pole pipe D3, inductance L2, Resistance and Capacitance Coupled Amplification Circuit, voltage follower circuit, signal receives low-pass filter circuit, and frequency is by mistake
Difference correcting 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 sheet U is connected.One end of resistance R9 is connected with the VINP pin processing 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, other end ground connection.The N pole of diode D3 with
The COM pin processing chip U is connected, and P pole is connected with the emitter stage of audion VT2.Voltage follower circuit and audion VT2
Base stage be connected.Signal receives the low-pass filter circuit VC pin respectively with voltage follower circuit and process chip U and is connected.
Correction of frequency errors circuit is connected with processing chip U.Resistance and Capacitance Coupled Amplification Circuit is serially connected in correction of frequency errors circuit and place
Between the VNEG pin of reason chip U.The VC pin of described process chip U 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 become, this demagnetizer can effectively eliminate or suppress Electromagnetic Interference signal in signal, make signal more steady, it is ensured that
Process chip U can receive signal accurately, thus improves the present invention accuracy to signal processing.Meanwhile, described letter
The input of number wave reception filtering circuit then output stage with the temperature sensor of temperature alarming device is connected, and this signal receives filter
Wave circuit is analyzed processing for the temperature signal being transmitted temperature sensor.Described correction of frequency errors circuit defeated
Going out end to be then connected with the controller of temperature alarming device, this controller is then that the signal transmitted according to signal processing system comes
Alarm is controlled.In order to ensure the practical effect of the present invention, described process chip U the most preferentially have employed
The integrated chip of AD603 realizes.
Further, described signal receive 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 positive pole with amplifier P1 after resistance R3 is connected, 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
Negative pole with polar capacitor C3 is connected afterwards, minus earth.The N pole of diode D1 is connected with the positive pole of amplifier P1, and P is the most suitable
Secondary it is connected through inductance L1 outfan with amplifier P1 after resistance R2.
Wherein, the negative pole of polar capacitor C1 be connected with the N pole of diode D1 after ground connection, 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, positive pole sequentially after resistance R6 and resistance R5 with the outfan phase of amplifier P1
Connect.
Meanwhile, the positive pole of polar capacitor C4 is connected with the outfan of amplifier P1, negative pole with after resistance R23 with amplification
The positive pole of device P4 is connected.After P electrode resistance R7 of diode D2, the negative pole with amplifier P1 is connected, N pole and resistance R6 and electricity
The junction point of resistance R5 is connected.The emitter stage of described audion VT1 is also connected with the VC pin processing chip U, its colelctor electrode
It is connected with the junction point of inductance L1 with resistance R2.Polar capacitor C1, polar capacitor C3 and polar capacitor C5 in this circuit make
For filter capacitor, and polar capacitor C3 and polar capacitor C5 forms the first filter；And amplifier P1, diode D1, inductance L1,
The amplifier that polar capacitor C6 and 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, and P pole is connected with the negative pole of polar capacitor C19
Connect.The positive pole of polar capacitor C12 after resistance R13 with process chip U FDBK be connected, negative pole after resistance R14 with amplification
The negative pole of device P2 is connected.The N pole of diode D6 base stage with audion VT3 after resistance R15 is connected, P pole and amplifier
The negative pole of P2 is connected.
Wherein, one end of resistance R16 is connected with the colelctor electrode of audion VT3, other end ground connection.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 processing 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
Being connected with the VPOS pin processing chip U after resistance R11 and inductance L3, 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 also junction point with resistance R11 with inductance L3 is connected, its source electrode and amplifier
The positive pole of P2 is connected；The negative pole of described amplifier P2 also with process chip U GND pin be connected after ground connection；Described polarity
The negative pole of electric capacity C11 as correction of frequency errors circuit outfan and with the controller signals input phase of temperature alarming device
Connect.And amplifier P2, field effect transistor MOS, adjustable resistance R12 and the polar capacitor C11 in this circuit defines actuator, should
Actuator is for being modified the phase and frequency of signal.
As in figure 2 it is shown, described voltage follower circuit is by amplifier P3, audion VT4, audion VT5, resistance R17, resistance
R18, adjustable resistance R19, resistance R20, resistance R21, resistance R22, resistance R23, resistance R24, resistance R25, resistance R26, resistance
R27, polar capacitor C13, polar capacitor C14, polar capacitor C15, polar capacitor C16, inductance L4, diode D7, and two poles
Pipe D8 forms.
During connection, one end of resistance R23 is connected with the positive pole of amplifier P4, the other end and signal wave reception filtering circuit phase
Connect.The positive pole of polar capacitor C16 negative pole with amplifier P4 after resistance R25 is connected, minus earth.Polar capacitor C15
Negative pole be connected with the base stage of audion VT5, positive pole outfan with amplifier P4 after resistance R24 is connected.Resistance R26
One end be connected with the positive pole of polar capacitor C15, other end ground connection.
Wherein, one end of resistance R27 is connected with the colelctor electrode colelctor electrode of audion VT5, other end ground connection.Polar capacitor
The negative pole of C14 outfan with amplifier P3 after resistance R20 is connected, positive pole after inductance L4 with the positive pole phase of amplifier P4
Connect.The P pole of diode D8 is connected with the negative pole of polar capacitor C14, N pole after resistance R22 with the emitter stage of audion VT5
It is connected.One end of resistance R21 is connected with the positive pole of amplifier P3, and the other end is connected with the emitter stage of audion VT5.
Meanwhile, the P pole of diode D7 is connected with the emitter stage of audion VT4, N pole after adjustable resistance R19 with amplification
The negative pole of device P3 is connected.The positive pole of polar capacitor C13 base stage with audion VT4 after resistance R17 is connected, negative pole with put
The negative pole of big device P3 is connected.One end of resistance R18 is connected with the base stage of audion VT4, and the other end is with polar capacitor C14's
Positive pole is connected.The grounded collector of described audion VT4；The emitter stage of described audion VT5 and the base stage phase of audion VT2
Connect.
As it is shown on figure 3, described Resistance and Capacitance Coupled Amplification Circuit is by audion VT6, audion VT7, resistance R28, resistance R29,
Resistance R30, resistance R31, resistance R32, resistance R33, resistance R34, resistance R35, polar capacitor C17, polar capacitor C18, polarity
Electric capacity C19, polar capacitor C20, polar capacitor C21, inductance L5, diode D9, diode D10, and diode D11 form.
During connection, the P pole of diode D10 is connected with the base stage of audion VT6, N pole and the VNEG pin processing chip U
It is connected.One end of resistance R33 is connected with the N pole of diode D10, other end ground connection.The positive pole of polar capacitor C17 is through resistance
After R30, the colelctor electrode with audion VT6 is connected, and negative pole base stage with audion VT6 after resistance R29 is connected.
Wherein, the P pole of diode D9 is connected with the positive pole of polar capacitor C17, N pole after resistance R28 with audion VT7
Colelctor electrode be connected.The positive pole of polar capacitor C20 is connected with the colelctor electrode of audion VT6, negative pole after inductance L5 with three
The base stage of pole pipe VT7 is connected.The positive pole of polar capacitor C18 negative pole with polar capacitor C20 after resistance R31 is connected, negative
Pole is connected with the colelctor electrode of audion VT7.The positive pole of polar capacitor C19 is connected with the colelctor electrode of audion VT7, negative pole with
Correction of frequency errors circuit is connected.
Meanwhile, the N pole of diode D11 negative pole with polar capacitor C19 after resistance R32 is connected, P pole and audion
The emitter stage of VT7 is connected.It is connected with the negative pole of polar capacitor C20 after the plus earth adjustable resistance R35 of polar capacitor C21
Connect, negative pole be connected with the emitter stage of audion VT7 after ground connection.One end of resistance R34 is connected with the emitter stage of audion VT6
Connect, other end ground connection.The minus earth of described polar capacitor C17.
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 interference signal that signal in end signal is stronger eliminates, through pre-filtered signal then by by amplifier P1, diode
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 filters again through the polar capacitor C4 as filter capacitor again, is had by the interference signal in signal
The elimination of effect, makes signal more steadily and be transferred to process chip U after resistance R9 carries out choked flow.Signal is entered by this process chip U
Row analyzing and processing after convert a signal into digital signal, this digital signal finally by correction of frequency errors circuit to digital signal
Phase and frequency error be adjusted, i.e. by amplifier P2, field effect transistor MOS, adjustable resistance R12 and the polarity in circuit
The actuator that electric capacity C11 is formed realizes being adjusted the phase and frequency error in digital signal, makes output signal keep
Stable, thus signal can be processed by the present invention accurately, it is ensured that temperature alarming device is in carbon baking furnace flue-gas temperature
The accuracy of too high alarm.
Wherein, the signal of signal wave reception filtering circuit output, before being changed, needs certain conversion time, at this turn
Changing in the time, in order to make the frequency of signal keep stable, such guarantee conversion accuracy, therefore the present invention then receives at signal
It is provided with voltage follower circuit between the base stage of filter circuit and audion VT2.This voltage follower circuit is mainly by two parameters
Consistent operational amplifier P3 and operational amplifier P4 combines peripheral electron element composition；This circuit realiration output voltage signal
Follow the low deviation of input voltage signal, i.e. this circuit can make output electricity to signal being adjusted by the frequency before changing
Pressure signal and input voltage signal realize low deviation, and time signal with circuit temperature or extraneous stable change, ripple does not occurs
Dynamic, can effectively make signal remain stable state before by conversion process, thus this circuit can effectively improve this
The bright accuracy to signal processing.
Meanwhile, be provided with can be to output between correction of frequency errors circuit and the VNEG pin processing chip U for the present invention
Signal carry out multistage amplification, the signal level of output signal and signal frequency can be adjusted to the level with input signal and letter
Number frequency is consistent, makes the intensity of signal be maintained at the Resistance and Capacitance Coupled Amplification Circuit of more than 1mV.Audion VT6 in this circuit, two
Pole pipe D10, polar capacitor C17, resistance R29, resistance R30, resistance R33 and resistance R34 form single order amplifier, this amplifier energy
The low frequency signal of output is amplified, makes low frequency signal identical with the level of reference signal.Meanwhile, electricity is amplified in this resistance-capacitance coupling
Resistance R28 in road, resistance R31, resistance R32, adjustable resistance R35, polar capacitor C18, polar capacitor C19, polar capacitor
The second order amplifier that C20, polar capacitor C21, inductance L5 and diode D11 are formed, this amplifier amplifies through single order amplifier
After signal again amplify, make the signal level frequency of output keep consistent with incoming signal level frequency, thus this be frequently
Rate error correction circuit can effectively improve the present invention accuracy to signal processing.
Additionally, the present invention effectively raises the accuracy to signal processing, make temperature alarming device at carbon baking furnace
Can carry out warning promptly and accurately when flue-gas temperature is too high, the high-temperature flue gas of carbon baking furnace can be discharged timely, can be effective
The carbon baking furnace that decreases work under superhigh temperature state, thus the present invention can effectively extend the use longevity of carbon baking furnace
Life.
As it has been described above, just can preferably realize the present invention.
Claims (6)
1. flue-gas temperature alarm device many circuit adjustment type signal processing system, mainly by processing 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 processing chip U after inductance L2
Property electric capacity C7, one end and process chip U the resistance that VINP pin is connected, the other end is connected with the base stage of audion VT2
R9, one end is connected with the colelctor electrode of audion VT2, resistance R8, the N pole of other end ground connection and process chip U COM pin phase
The diode D3 that connection, P pole are connected with the emitter stage of audion VT2, the voltage follow being connected with the base stage of audion VT2
Circuit, the signal that the VC pin with voltage follower circuit and process chip U is connected respectively receives low-pass filter circuit, with process
The correction of frequency errors circuit that chip U is connected, and it is serially connected in correction of frequency errors circuit and the VNEG pin processing chip U
Between Resistance and Capacitance Coupled Amplification Circuit composition；The VC pin of described process chip U is connected with outside 12V DC source.
A kind of flue-gas temperature alarm device many circuit adjustment type signal processing system the most according to claim 1, it is special
Levy and be: described Resistance and Capacitance Coupled Amplification Circuit is by audion VT6, and audion VT7, P pole is connected with the base stage of audion VT6, N
The diode D10 that pole is connected with the VNEG pin processing chip U, one end is connected with the N pole of diode D10, another termination
The resistance R33 on ground, positive pole colelctor electrode with audion VT6 after resistance R30 is connected, negative pole after resistance R29 with audion
Polar capacitor C17, the P pole that the base stage of VT6 is connected is connected with the positive pole of polar capacitor C17, N pole after resistance R28 with three
The diode D9 that the colelctor electrode of pole pipe VT7 is connected, positive pole is connected with the colelctor electrode of audion VT6, negative pole is after inductance L5
The polar capacitor C20 being connected with the base stage of audion VT7, positive pole negative pole with polar capacitor C20 after resistance R31 is connected
Connect, polar capacitor C18 that negative pole is connected with the colelctor electrode of audion VT7, positive pole is connected with the colelctor electrode of audion VT7,
Polar capacitor C19, the N pole that negative pole is connected with correction of frequency errors circuit after resistance R32 with the negative pole phase of polar capacitor C19
The diode D11 that connection, P pole are connected with the emitter stage of audion VT7, with polar capacitor after plus earth adjustable resistance R35
The polar capacitor C21 of ground connection after the negative pole of C20 is connected, negative pole is connected with the emitter stage of audion VT7, and one end and three
The emitter stage of pole pipe VT6 is connected, the resistance R34 of other end ground connection composition；The minus earth of described polar capacitor C17.
A kind of flue-gas temperature alarm device many circuit adjustment type signal processing system the most according to claim 2, it is special
Levy and be: described voltage follower circuit by amplifier P3, audion VT4, audion VT5, the positive pole phase of one end and amplifier P4
Connect, the resistance R23 that is connected with signal wave reception filtering circuit of the other end, positive pole after resistance R25 with the negative pole of amplifier P4
Be connected, the polar capacitor C16 of minus earth, negative pole is connected with the base stage of audion VT5, positive pole after resistance R24 with put
Polar capacitor C15 that the outfan of big device P4 is connected, one end is connected with the positive pole of polar capacitor C15, other end ground connection
Resistance R26, one end is connected with the colelctor electrode colelctor electrode of audion VT5, the resistance R27 of other end ground connection, and negative pole is through resistance R20
The polar capacitor C14 that outfan with amplifier P3 is connected afterwards, positive pole positive pole with amplifier P4 after inductance L4 is connected,
The diode that P pole is connected with the negative pole of polar capacitor C14, N pole emitter stage with audion VT5 after resistance R22 is connected
D8, resistance R21, the P pole that one end is connected with the positive pole of amplifier P3, the other end is connected with the emitter stage of audion VT5 with
The diode D7 that the emitter stage of audion VT4 is connected, N pole negative pole with amplifier P3 after adjustable resistance R19 is connected, just
Pole polar capacitor C13 that base stage is connected, negative pole is connected with the negative pole of amplifier P3 with audion VT4 after resistance R17,
And the resistance R18 composition that one end is connected with the base stage of audion VT4, the other end is connected with the positive pole of polar capacitor C14；
The grounded collector of described audion VT4；The emitter stage of described audion VT5 is connected with the base stage of audion VT2.
A kind of flue-gas temperature alarm device many circuit adjustment type signal processing system the most according to claim 3, it is special
Levy and be: described signal receives low-pass filter circuit by amplifier P1, audion VT1, positive pole after resistance R3 with amplifier P1
Positive pole be connected, negative pole receives the polar capacitor C3 of input of low-pass filter circuit as signal, positive pole is after resistance R4
Be connected with the negative pole of polar capacitor C3, polar capacitor C5, the N pole of minus earth is connected with the positive pole of amplifier P1, P is the most suitable
The secondary diode D1 being connected through inductance L1 outfan with amplifier P1 after resistance R2, the N pole phase of negative pole and diode D1
The polar capacitor C1 that after connection, ground connection, positive pole base stage with audion VT1 after resistance R1 is connected, positive pole and audion VT1
Emitter stage be connected, the polar capacitor C2 of minus earth, negative pole is connected with the negative pole of amplifier P1, positive pole is sequentially through resistance
The polar capacitor C6 being connected with the outfan of amplifier P1 after R6 and resistance R5, positive pole is connected with the outfan of amplifier P1
Connect, polar capacitor C4 that negative pole is connected with positive pole with amplifier P4 after resistance R23, and after P electrode resistance R7 with amplification
The diode D2 composition that the negative pole of device P1 is connected, N pole is connected with the junction point of resistance R6 and resistance R5；Described audion
The emitter stage of VT1 is also connected with the VC pin processing chip U, its colelctor electrode is connected with the junction point of inductance L1 with resistance R2
Connect.
A kind of flue-gas temperature alarm device many circuit adjustment type signal processing system the most according to claim 4, it is special
Levying and be: described correction of frequency errors electricity routing amplifier P2, field effect transistor MOS, audion VT3, N pole is with amplifier P2 just
Pole is connected, P pole is connected with the negative pole of polar capacitor C19 diode D5, positive pole after resistance R13 with process chip U
Polar capacitor C12, the N pole that FDBK is connected, negative pole negative pole with amplifier P2 after resistance R14 is connected is after resistance R15
Be connected with the base stage of audion VT3, diode D6 that P pole is connected with the negative pole of amplifier P2, one end is with audion VT3's
Colelctor electrode is connected, the resistance R16 of other end ground connection, and positive pole is connected with the outfan of amplifier P2, negative pole and audion VT3
The polar capacitor C11 that is connected of emitter stage, positive pole is connected with the VOUT pin processing chip U, negative pole and field effect transistor MOS
Polar capacitor C9, the P pole that is connected of grid be sequentially connected with the VPOS pin processing chip U after inductance L3 through resistance R11
Connect, diode D4 that N pole is connected with the negative pole of polar capacitor C11, positive pole is connected with the P pole of diode D4, negative pole is through can
Adjust the polar capacitor C10 being connected after resistance R12 with the negative pole of polar capacitor C11, and the drain electrode of negative pole and field effect transistor MOS
Be connected, polar capacitor C8 that positive pole is connected with the N pole of diode D4 after resistance R10 composition；Described field effect transistor MOS
Drain electrode also junction point with resistance R11 with inductance L3 is connected, its source electrode is connected with the positive pole of amplifier P2；Described amplifier
The negative pole of P2 also with process chip U GND pin be connected after ground connection；The negative pole of described polar capacitor C11 is as frequency error
The outfan of correcting circuit.
A kind of flue-gas temperature alarm device many circuit adjustment type signal processing system the most according to claim 5, it is special
Levy and be: described process chip U is the integrated chip of AD603.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113334255A (en) * | 2021-08-06 | 2021-09-03 | 江苏润杨精密制造有限公司 | Automobile part polishing safety protection system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113334255A (en) * | 2021-08-06 | 2021-09-03 | 江苏润杨精密制造有限公司 | Automobile part polishing safety protection system |
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