CN110658805B - Signal calibration circuit of industrial building fire-fighting system - Google Patents
Signal calibration circuit of industrial building fire-fighting system Download PDFInfo
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- CN110658805B CN110658805B CN201910945325.XA CN201910945325A CN110658805B CN 110658805 B CN110658805 B CN 110658805B CN 201910945325 A CN201910945325 A CN 201910945325A CN 110658805 B CN110658805 B CN 110658805B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0259—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the response to fault detection
- G05B23/0286—Modifications to the monitored process, e.g. stopping operation or adapting control
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24065—Real time diagnostics
Abstract
The invention discloses a signal calibration circuit of an industrial building fire-fighting system, which comprises a frequency acquisition circuit, a mean push-pull circuit and a filtering transmitting circuit, the frequency acquisition circuit acquires the signal frequency of an input end in an analog signal transmission channel in a signal transmission module of the industrial building fire-fighting system, one path of the mean-value push-pull circuit uses an operational amplifier AR1 to follow signals, and the other path uses an operational amplifier AR4, a triode Q3 and a capacitor C2 to form a noise reduction circuit to reduce the signal-to-noise ratio, then, the operational amplifier AR2 is used for adding the two paths of signals, the operational amplifier AR2 outputs signals to be input into an average value circuit consisting of the operational amplifier AR3, a diode D2 and a diode D3, a filter transmitting circuit uses a filter circuit consisting of an inductor L2, a capacitor C4 and a capacitor C5 to filter the signals, the signals are transmitted into a control terminal of the fire-fighting system of the industrial building through a signal transmitter E1, and after the signals are automatically calibrated, the signals are converted into error correction signals of the control terminal of the fire-fighting system of the industrial building.
Description
Technical Field
The invention relates to the technical field of circuits, in particular to a signal calibration circuit of an industrial building fire-fighting system.
Background
At present, an industrial building fire fighting system comprises a control terminal, a signal transmission module and an industrial building information acquisition module, wherein the control terminal is used for receiving inspection result information of a user according to inspection of a target building site and sending the inspection result information of the industrial building information acquisition module to the control terminal, and the control terminal is used for receiving the inspection result information and calculating a target building site and fire safety scores of designated targets in the target building site according to preset evaluation indexes based on the inspection result information; the control terminal is further used for determining the fire safety levels of the target building site and each designated target in the target building site according to the calculated fire safety scores of the target building site and each designated target in the target building site, wherein the signal transmission module comprises an analog signal transmission channel and a data signal transmission channel, and signals in the analog signal transmission channel are easy to interfere and attenuate in the transmission process due to the fact that a large number of high-frequency devices are used in industrial production, so that the signals received by the control terminal exceed the error range, and the evaluation of the fire safety level result of the determined target of the control terminal is influenced.
Disclosure of Invention
In view of the above situation, and in order to overcome the defects of the prior art, the present invention provides a signal calibration circuit for an industrial building fire protection system, which has the characteristics of ingenious conception and humanized design, can monitor the signal frequency at the input end in an analog signal transmission channel in a signal transmission module of the industrial building fire protection system in real time, and automatically calibrate the signal and then convert the signal into an error correction signal of a control terminal of the industrial building fire protection system.
The technical scheme includes that the signal calibration circuit of the industrial building fire protection system comprises a frequency acquisition circuit, an average push-pull circuit and a filtering emission circuit, wherein the frequency acquisition circuit acquires signal frequency of an input end in an analog signal transmission channel in a signal transmission module of the industrial building fire protection system, one path of the average push-pull circuit utilizes an operational amplifier AR1 to follow signals, the other path of the average push-pull circuit utilizes an operational amplifier AR4, a triode Q3 and a capacitor C2 to form a noise reduction circuit to reduce signal-to-noise ratio, then the operational amplifier AR2 is used to add the two paths of signals, an operational amplifier AR2 outputs signals to an average circuit composed of an operational amplifier AR3, a diode D2 and a diode D3, wherein a triode Q1 and a triode Q2 form a push-pull circuit positive feedback operational amplifier AR1 to output signals to an in-phase input end of the operational amplifier AR3, a triode Q4 detects potential difference of output signals of the operational amplifier 85AR, the feedback signal is sent to the inverting input end of the operational amplifier AR3 and the base electrode of the triode Q3, the amplitude of the output signal of the average circuit is adjusted, the filtering and transmitting circuit utilizes a filter circuit consisting of an inductor L2, a capacitor C4 and a capacitor C5 to filter the signal, and the signal is sent to the control terminal of the fire-fighting system of the industrial building through a signal transmitter E1, namely the error correction signal of the control terminal of the fire-fighting system of the industrial building.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages;
1. an operational amplifier AR1 is used for following signals, in order to ensure the consistency with two paths of signals, the two paths of signals form a noise reduction circuit by using an operational amplifier AR4, a triode Q3 and a capacitor C2 to reduce the signal-to-noise ratio and improve the anti-interference performance of the signals, then the operational amplifier AR2 is used for adding the two paths of signals, the consistency of the amplitudes of the signals and source signals can be ensured, the anti-interference performance of the signals can be improved, the operational amplifier AR2 outputs signals to be input into an average circuit formed by the operational amplifier AR3, a diode D2 and a diode D3, the average circuit extracts an average signal in the signals, the signal amplitude is ensured, and the reliability is high;
2. a triode Q1 and a triode Q2 form a push-pull circuit positive feedback operational amplifier AR1 to output signals to an in-phase input end of an operational amplifier AR3, the push-pull circuit prevents signal cross distortion, the signals output by the operational amplifier AR1 can be fed back to further improve signal stability, a triode Q4 detects the potential difference of the signals output by the operational amplifier AR3 and the operational amplifier AR2, the signals are fed back to an opposite-phase input end of the operational amplifier AR3 and a base electrode of the triode Q3, the amplitude of the signals output by an average value circuit is adjusted to further improve the precision of compensation signals, and finally a filter circuit formed by an inductor L2, a capacitor C4 and a capacitor C5 is used for filtering the signals and is sent to a control terminal of an industrial fire-fighting system through a signal transmitter E1, namely an error correction signal for the control terminal of the industrial fire-fighting system, and the signal error received by the.
Drawings
Fig. 1 is a mean value push-pull circuit diagram of a signal calibration circuit of an industrial building fire protection system according to the present invention.
Fig. 2 is a circuit diagram of a frequency acquisition circuit of the signal calibration circuit of the fire protection system of the industrial building.
Fig. 3 is a filtering transmitting circuit diagram of the signal calibration circuit of the fire protection system of the industrial building.
Detailed Description
The foregoing and other aspects, features and advantages of the invention will be apparent from the following more particular description of embodiments of the invention, as illustrated in the accompanying drawings in which reference is made to figures 1 to 3. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
A signal calibration circuit of an industrial building fire protection system comprises a frequency acquisition circuit, a mean value push-pull circuit and a filtering transmitting circuit, wherein the frequency acquisition circuit acquires the signal frequency of an input end in an analog signal transmission channel in a signal transmission module of the industrial building fire protection system, one path of the mean value push-pull circuit follows signals by using an operational amplifier AR1, the other path of the mean value push-pull circuit reduces the signal-to-noise ratio by using a noise reduction circuit formed by an operational amplifier AR4, a triode Q3 and a capacitor C2, then the two paths of signals are subjected to addition processing by using an operational amplifier AR2, an output signal of the operational amplifier AR2 is input into a mean value circuit formed by the operational amplifier AR3, a diode D2 and a diode D3, wherein the triode Q1 and a triode Q2 form a push-pull circuit positive feedback operational amplifier AR1, the output signal is input end of the operational amplifier AR3, and the triode AR4 detects the operational amplifier, The operational amplifier AR2 outputs a signal potential difference, a feedback signal is sent to the inverting input end of the operational amplifier AR3 and the base electrode of the triode Q3, the amplitude of an output signal of the mean value circuit is adjusted, the filtering and transmitting circuit uses a filter circuit consisting of an inductor L2, a capacitor C4 and a capacitor C5 to filter the signal, and the signal is sent to a control terminal of the fire-fighting system of the industrial building through a signal transmitter E1, namely an error correction signal of the control terminal of the fire-fighting system of the industrial building;
one path of the average push-pull circuit utilizes an operational amplifier AR1 to follow signals, in order to ensure the consistency with two paths of signals, the other path utilizes an operational amplifier AR4, a triode Q3 and a capacitor C2 to form a noise reduction circuit to reduce the signal-to-noise ratio and improve the anti-interference performance of the signals, then an operational amplifier AR2 is utilized to add the two paths of signals, the consistency of the amplitudes of the signals and the source signals can be ensured, the anti-interference performance of the signals can be improved, the output signal of the operational amplifier AR2 is input into an average circuit formed by the operational amplifier AR3, a diode D2 and a diode D3, the average circuit extracts the average signal in the signals and ensures the amplitude of the signals, wherein the triode Q1 and the triode Q2 form a positive feedback operational amplifier AR1 of the circuit to output signals into the in-phase input end of the operational amplifier AR3, the push-pull circuit is used for preventing the signal cross distortion, the triode Q4 detects the potential difference of the output signals of the operational amplifier AR3 and the operational amplifier AR2, feeds back signals to the inverting input end of the operational amplifier AR3 and the base electrode of the triode Q3, adjusts the amplitude of the output signal of the mean circuit and plays a role in further improving the precision of the compensation signal;
the non-inverting input terminal of the operational amplifier AR1 is connected to one end of the resistor R2 and the resistor R5, the inverting input terminal of the operational amplifier AR1 is connected to one end of the resistor R6, the other end of the resistor R5 is connected to the non-inverting input terminal of the operational amplifier AR4 and one end of the capacitor C4, the inverting input terminal of the operational amplifier AR4 is connected to one end of the resistor R4 and one end of the resistor R4, the other end of the resistor R4 is grounded, the other end of the resistor R4 is connected to the base of the transistor Q4, the emitter of the transistor Q4 is connected to one end of the capacitor C4, the other end of the capacitor C4 is grounded, the output terminal of the operational amplifier AR4 is connected to the collector of the transistor Q4, the collector of the transistor Q4 and the other end of the capacitor C4, the non-inverting input terminal of the resistor R4 is connected to the non-inverting input terminal of the operational amplifier AR4 and the collector of the transistor R4, the collector of the transistor R4 is connected to the ground, and the, the inverting input end of the operational amplifier AR2 is connected to one end of a resistor R8 and one end of a resistor R9, the other end of the resistor R8 is grounded, the other end of the resistor R9 is connected to the output end of the operational amplifier AR2, the non-inverting input end of the operational amplifier AR3, the base of a triode Q4, the emitter of a triode Q1, the emitter of a triode Q2, the anode of a diode D2 and one end of a capacitor C6, the inverting input end of the operational amplifier AR3 is connected to one end of a resistor R10 and the base of a triode Q3, the other end of a resistor R10 is grounded, and the output end of the operational amplifier AR3 is connected to the cathode of a diode D2, the cathode of a diode D36.
On the basis of the scheme, the signal output circuit utilizes a filter circuit consisting of an inductor L2, a capacitor C4 and a capacitor C5 to filter signals, and the signals are sent into a control terminal of the fire protection system of the industrial building through a signal transmitter E1, namely, error correction signals of the control terminal of the fire protection system of the industrial building are also sent, one end of an inductor L2 is connected with one end of a resistor R11, one end of a capacitor C4 and the anode of a diode D3, the other end of an inductor L2 is connected with one end of a resistor R12 and one end of a capacitor C5, the other ends of the resistor R11, the capacitor C4 and the capacitor C5 are grounded, and the other end of the resistor R12 is connected;
the frequency acquisition circuit adopts a frequency collector J1 with the model of SJ-ADC to acquire the signal frequency of an input end in an analog signal transmission channel in a signal transmission module of an industrial building fire protection system, the power supply end of a frequency collector J1 is connected with +5V, the grounding end of the frequency collector J1 is grounded, the output end of the frequency collector J1 is connected with the negative electrode of a voltage regulator tube D1 and one end of a resistor R1, the positive electrode of a voltage regulator tube D1 is grounded, the other end of the resistor R1 is connected with one end of a capacitor C1 and the other end of a resistor R2, and the other end of the capacitor C1 is grounded.
When the invention is used in particular, the signal calibration circuit of the industrial building fire protection system comprises a frequency acquisition circuit, a mean value push-pull circuit and a filtering emission circuit, wherein the frequency acquisition circuit acquires the signal frequency of an input end in an analog signal transmission channel in a signal transmission module of the industrial building fire protection system, one path of the mean value push-pull circuit uses an operational amplifier AR1 to follow signals, in order to ensure the consistency with two paths of signals, the other path uses an operational amplifier AR4, a triode Q3 and a capacitor C2 to form a noise reduction circuit to reduce the signal noise ratio and improve the anti-interference performance of the signals, then uses the operational amplifier AR2 to add the two paths of signals, not only can ensure the consistency of the amplitudes of the signals and source signals, but also can improve the anti-interference performance of the signals, the operational amplifier AR2 outputs the signals to be input into a mean value circuit formed by the operational amplifier AR3, a diode D2 and a diode D3, the signal amplitude is ensured, wherein a triode Q1 and a triode Q2 form a push-pull circuit, a positive feedback operational amplifier AR1 outputs signals to the non-inverting input end of an operational amplifier AR3, the push-pull circuit prevents signal cross-over distortion, the signals output by the operational amplifier AR1 are fed back, the signal stability can be further improved, the triode Q4 detects the potential difference of the signals output by the operational amplifier AR3 and the operational amplifier AR2, the signals are fed back to the inverting input end of the operational amplifier AR3 and the base electrode of the triode Q3, the amplitude of the signals output by the mean value circuit is adjusted, the compensation signal precision is further improved, a filter transmitting circuit forms a filter circuit by using an inductor L2, a capacitor C4 and a capacitor C5 to filter the signals, and the filter transmitting the signals to a control terminal of an industrial building fire protection system through a signal transmitter E1, namely.
While the invention has been described in further detail with reference to specific embodiments thereof, it is not intended that the invention be limited to the specific embodiments thereof; for those skilled in the art to which the present invention pertains and related technologies, the extension, operation method and data replacement should fall within the protection scope of the present invention based on the technical solution of the present invention.
Claims (4)
1. A signal calibration circuit of an industrial building fire protection system comprises a frequency acquisition circuit, an average push-pull circuit and a filtering emission circuit, and is characterized in that the frequency acquisition circuit acquires the signal frequency of an input end in an analog signal transmission channel in a signal transmission module of the industrial building fire protection system, one path of the average push-pull circuit uses an operational amplifier AR1 to follow signals, the other path of the average push-pull circuit uses an operational amplifier AR4, a triode Q3 and a capacitor C2 to form a noise reduction circuit to reduce the signal-to-noise ratio, then the operational amplifier AR2 is used to add the two paths of signals, an operational amplifier AR2 outputs signals to an average circuit formed by the operational amplifier AR3, a diode D2 and a diode D3, wherein a triode Q1 and a triode Q2 form a push-pull circuit positive feedback operational amplifier AR1 outputs signals to an in-phase input end of the operational amplifier AR3, a triode Q4 detects the potential difference of output signals of the operational, the feedback signal is sent to the inverting input end of the operational amplifier AR3 and the base electrode of the triode Q3, the amplitude of the output signal of the average circuit is adjusted, the filtering and transmitting circuit utilizes a filter circuit consisting of an inductor L2, a capacitor C4 and a capacitor C5 to filter the signal, and the signal is sent to the control terminal of the fire-fighting system of the industrial building through a signal transmitter E1, namely the error correction signal of the control terminal of the fire-fighting system of the industrial building.
2. The signal calibration circuit of the fire protection system of the industrial building according to claim 1, wherein the mean-value push-pull circuit comprises an operational amplifier AR1, the non-inverting input terminal of the operational amplifier AR1 is connected to one terminal of a resistor R2 and a resistor R5, the inverting input terminal of the operational amplifier AR1 is connected to one terminal of a resistor R6, the other terminal of the resistor R5 is connected to the non-inverting input terminal of an operational amplifier AR4 and one terminal of a capacitor C2, the inverting input terminal of the operational amplifier AR4 is connected to one terminal of a resistor R3 and a resistor R4, the other terminal of the resistor R3 is connected to ground, the other terminal of the resistor R4 is connected to the base of a transistor Q3 and the emitter of a transistor Q1, the emitter of a transistor Q3 is connected to one terminal of a capacitor C3, the other terminal of the capacitor C3 is connected to ground, the output terminal of the operational amplifier AR3 is connected to the collector of the transistor Q3, the collector of the transistor Q3, the other end of the resistor R7 is connected with the output end of the amplifier AR1 and the other end of the resistor R6, the collector of the triode Q1 is grounded, the collector of the triode Q2 is connected with +5V, the inverting input end of the amplifier AR2 is connected with one end of the resistor R8 and one end of the resistor R9, the other end of the resistor R8 is grounded, the other end of the resistor R9 is connected with the output end of the amplifier AR2, the non-inverting input end of the amplifier AR3, the base of the triode Q4, the emitter of the triode Q1, the emitter of the triode Q2, the anode of the diode D2 and one end of the capacitor C6, the inverting input end of the amplifier AR3 is connected with one end of the resistor R10 and the base of the transistor Q3, the other end of the resistor R10 is grounded, and the output end of the amplifier AR3 is connected with the cathode of the diode.
3. The signal calibration circuit of the fire protection system of the industrial building as claimed in claim 2, wherein the signal output circuit comprises an inductor L2, one end of the inductor L2 is connected to a resistor R11, one end of a capacitor C4 and the anode of a diode D3, the other end of the inductor L2 is connected to a resistor R12, one end of a capacitor C5, the other ends of the resistor R11, the capacitor C4 and the capacitor C5 are connected to ground, and the other end of the resistor R12 is connected to a signal transmitter E1.
4. The signal calibration circuit of the fire protection system of the industrial building as claimed in claim 1, wherein the frequency acquisition circuit comprises a frequency collector J1 with the model number of SJ-ADC, the power supply end of the frequency collector J1 is connected with +5V, the grounding end of the frequency collector J1 is grounded, the output end of the frequency collector J1 is connected with the cathode of a voltage regulator D1 and one end of a resistor R1, the anode of the voltage regulator D1 is grounded, the other end of the resistor R1 is connected with one end of a capacitor C1 and the other end of a resistor R2, and the other end of the capacitor C1 is grounded.
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| CN201910945325.XA CN110658805B (en) | 2019-09-30 | 2019-09-30 | Signal calibration circuit of industrial building fire-fighting system |
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| CN111245456B (en) * | 2020-03-01 | 2020-10-02 | 北京瞭望神州科技有限公司 | Service management system based on big data |
| CN111464174A (en) * | 2020-04-16 | 2020-07-28 | 蔡波 | Sewage treatment monitoring system |
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Effective date of registration: 20201111 Address after: 300000 B building, No. 18 Taierzhuang Road, Heping District, Tianjin, China, 102 Applicant after: TIANJIN SHENGDAN ELECTRONIC TECHNOLOGY DEVELOPMENT Co.,Ltd. Address before: 450001 Building 59, Headquarters Enterprise Base, No. 1 Cuizhu Street, Zhengzhou High-tech Zone, Henan Province Applicant before: Henan Xin'anli Fire Safety Evaluation Co.,Ltd. |
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