CN113775532B - Distributed cable channel on-line monitoring system - Google Patents
Distributed cable channel on-line monitoring system Download PDFInfo
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- CN113775532B CN113775532B CN202111329801.9A CN202111329801A CN113775532B CN 113775532 B CN113775532 B CN 113775532B CN 202111329801 A CN202111329801 A CN 202111329801A CN 113775532 B CN113775532 B CN 113775532B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/12—Combinations of two or more pumps
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/10—Miscellaneous comprising sensor means
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Abstract
The invention discloses a distributed cable channel online monitoring system, which effectively solves the problem of inaccurate water level signals detected by using a floating ball liquid level switch as a water level detection sensor in the prior art, the invention uses a liquid level sensor U1 to detect the water level signals in a cable channel, performs subtraction operation on the water level signals, then starts an integral comparison circuit, and transmits the water level signals to the integral comparison circuit, the integral comparison circuit performs integral and comparison on the water level signals to obtain comparison signals, the comparison signals start a comprehensive control circuit, the comprehensive starting circuit respectively starts an automatic drain pump and a manual drain pump, and outputs alarm signals to a control center, so that the safety of cables in the cable channel is ensured, and the electricity utilization safety of people is also ensured.
Description
Technical Field
The invention relates to the field of cable channel monitoring, in particular to a distributed cable channel online monitoring system.
Background
In order to master the environmental condition of the cable channel to better protect the cable in the channel and avoid influencing the electricity consumption of people, the prior art is provided with a distributed cable channel online monitoring system for detecting the cable channel, mainly detects the water level, the environmental temperature, the environmental humidity and various gas contents in the cable channel through various sensors, and utilizes the sensors to correspondingly arrange a water level detection unit, a temperature detection unit, a humidity detection unit, a gas detection unit and related auxiliary linkage facilities such as a well cover, an exhaust fan and an automatic and manual drainage pump, and utilizes the related auxiliary linkage facilities to improve the environmental level in the cable channel, thereby playing a better role.
However, in practical application, the problem of low accuracy occurs when the control center analyzes the water level signal transmitted by the water level detection unit arranged in the cable channel, and the reason is that when the floating ball liquid level switch is used as the water level detection sensor of the water level detection unit, the floating ball liquid level switch is easily affected by water level, temperature, scale, impurities and liquid viscosity, so that the detected water level signal is inaccurate, and the phenomenon of misoperation of the automatic drainage pump in the cable channel easily occurs.
The present invention therefore provides a new solution to this problem.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a distributed cable channel online monitoring system, which effectively solves the problem that a detected water level signal is inaccurate when a floating ball liquid level switch is used as a water level detection sensor in the prior art.
The technical scheme includes that the distributed cable channel online monitoring system comprises a temperature detection unit, a humidity detection unit, a gas detection unit and a water level detection unit, wherein the water level detection unit comprises a detection operation circuit, an integral comparison circuit and a comprehensive control circuit, the comparison detection circuit detects a water level signal in a cable channel by using a liquid level sensor U1, the integral comparison circuit is started after the water level signal is subjected to subtraction operation and transmits the water level signal to the integral comparison circuit, the integral comparison circuit performs integral comparison and comparison on the water level signal to obtain a comparison signal, the comprehensive control circuit is started by the comparison signal, and the comprehensive start circuit respectively starts an automatic draining pump and a manual draining pump and outputs an alarm signal to a control center.
Furthermore, the detection arithmetic circuit comprises a resistor R1, one end of the resistor R1 is connected with a pin 2 of the liquid level sensor U1, a pin 1 of the liquid level sensor U1 is respectively connected with one end of the resistor R4 and a positive polarity power supply VCC, the other end of the resistor R1 is connected with a non-inverting end of the operational amplifier U2A, an inverting end of the operational amplifier U2A is respectively connected with an output end of the operational amplifier U2A, one end of the resistor R2, an inverting end of the operational amplifier U5A and one end of the resistor R3, the non-inverting end of the operational amplifier U5A is respectively connected with the other end of the resistor R2, one end of a capacitor C1 and the output end of an operational amplifier U5A are connected with the base electrode of a triode Q1, the collector electrode of the triode Q1 is respectively connected with the other end of a resistor R4 and the anode of a diode D2, the emitter electrode of the triode Q1 is connected with one end of a resistor R7, and the other end of the resistor R7 is respectively connected with the other end of a resistor R3, the other end of the capacitor C1 and a pin 3 of a liquid level sensor U1 and connected with the ground in parallel.
Furthermore, the integral comparison circuit comprises a capacitor C2, one end of the capacitor C2 is connected to the control electrode of the thyristor Q2 and the negative electrode of the diode D2 in the detection operation circuit, the anode of the thyristor Q2 and the inverting terminal of the operational amplifier U5A in the detection operation circuit, the cathode of the thyristor Q2 is connected to one end of the resistor R8 and the anode of the thyristor Q4, the other end of the resistor R8 is connected to one end of the capacitor C5 and the inverting terminal of the operational amplifier U8A, the inverting terminal of the operational amplifier U8A is connected to one end of the resistor R6 and one end of the capacitor C3, the output end of the operational amplifier U8A is connected to the other end of the capacitor C3, the negative electrode of the regulator D1 and the anode of the regulator D1 are connected to one end of the capacitor C4 and the control electrode of the thyristor Q4, the cathode of the Q4 is connected to the other end of the resistor R4, the other end of the operational amplifier U4 and the inverting terminal of the operational amplifier U5, the inverting end of the operational amplifier U4A is connected to the adjustable end of the resistor R13, the right end of the resistor R13 is connected to the other end of the capacitor C4, the other end of the resistor R6, the other end of the capacitor C5, the other end of the capacitor C2 and the other end of the resistor R7 in the detection arithmetic circuit respectively and is connected to the ground, the left end of the resistor R13 is connected to one end of the resistor R11, the other end of the resistor R11 is connected to one end of the resistor R10 and the non-inverting end of the operational amplifier U7A respectively, and the other end of the resistor R10 is connected to the other end of the resistor R4 in the detection arithmetic circuit and is connected to the positive power supply VCC.
Further, the integrated control circuit comprises a diode D3, the anode of the diode D3 is connected with the output end of an operational amplifier U4A in the integral comparison circuit, the cathode of the diode D3 is connected with a pin 10 of an or gate U3C, the pin 11 of the or gate U3C is connected with the output end of a nand gate U6A, the input end of a not gate U6A is connected with the anode of a diode D4 and the output end of an operational amplifier U7A in the integral comparison circuit respectively, the output end of the or gate U3C is connected with one end of a resistor R15, the other end of the resistor R15 is connected with an automatic drain pump or the pin 11 of a gate U9C respectively, the output end of the or gate U9C is connected with a control center, the pin 10 of the gate U9C is connected with a manual drain pump and one end of a resistor R18 respectively, the other end of the resistor is connected with one end of a switch S1, the other end of the switch S1 is connected with one end of a relay K1 and the cathode of a diode D4, the other end of the integral relay K1 is connected with a capacitor 4C 9 in the integral comparison circuit respectively, The other end of the resistor R7 in the detection arithmetic circuit is connected and grounded.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages:
(1) replace floater level switch as the water level detection sensor through setting up level sensor U1 and detect the water level signal in the cable channel, reduce the received water level signal inaccuracy because of the control center that floater level switch caused, the unsafe problem of the water level signal that detects when having avoided utilizing floater level switch as water level detection sensor among the prior art, improve water level detection unit's accuracy, the problem of automatic drainage pump maloperation has also been avoided simultaneously, on the basis of automatic drainage pump, start manual drainage pump, it is the cable channel drainage to increase the dynamics, the safety of the cable in the cable channel has been guaranteed, and then people's power consumption safety has also been guaranteed.
(2) The automatic draining pump is not started when the water level does not have the ascending trend and is safe, the automatic draining pump is prevented from doing useless work, the window comparator in the integral comparison circuit is used for gradually starting the automatic draining pump and the manual draining pump, and the automatic draining pump and the manual draining pump are reasonably utilized.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
The foregoing and other technical and other features and advantages of the invention will be apparent from the following detailed description of the embodiments, which proceeds with reference to fig. 1. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
The utility model provides a distributed cable channel on-line monitoring system, monitoring system includes temperature detecting element, humidity detecting element, gaseous detecting element, water level detecting element is including detecting arithmetic circuit, integral comparison circuit and integrated control circuit.
The detection and operation circuit uses a liquid level sensor U1 to replace a float ball liquid level switch as a water level detection sensor to detect a water level signal in a cable channel, the liquid level sensor U1 can use any ultrasonic liquid level sensor in the prior art, the output of which is analog voltage, the prior art is adopted, and details are not repeated, a resistor R1 transmits the water level signal detected by the liquid level sensor U1 to an operational amplifier U2A, the operational amplifier U2A carries out input buffering on the water level signal and transmits the water level signal to the operational amplifier U5A in two paths, one path directly transmits the water level signal to the same-phase end of the operational amplifier U5A, the other path transmits the water level signal to the opposite-phase end of the operational amplifier U5A after being delayed by the resistor R2 and a capacitor C1, the operational amplifier U5A carries out subtraction operation on the two paths of water level signals to obtain a water level change value in the cable channel, when the operational amplifier U5A cannot conduct a triode Q1, it indicates that the water level in the cable channel does not rise at this time, and the water level does not need to be processed, and when the operational amplifier U5A turns on the transistor Q1, it indicates that the water level in the cable channel rises, and at this time, the transistor Q1 turns on the diode D2, and the integral comparison circuit is started.
The detection operation circuit comprises a resistor R1, one end of a resistor R1 is connected with a pin 2 of a liquid level sensor U1, a pin 1 of the liquid level sensor U1 is respectively connected with one end of a resistor R4 and a positive polarity power supply VCC, the other end of the resistor R1 is connected with the in-phase end of an operational amplifier U2A, the inverting end of the operational amplifier U2A is respectively connected with the output end of the operational amplifier U2A, one end of a resistor R2, the inverting end of the operational amplifier U5A and one end of a resistor R3, the in-phase end of the operational amplifier U5A is respectively connected with the other end of a resistor R2, one end of a capacitor C1 and the output end of an operational amplifier U5A are connected with the base electrode of a triode Q1, the collector electrode of the triode Q1 is respectively connected with the other end of a resistor R4 and the anode of a diode D2, the emitter electrode of the triode Q1 is connected with one end of a resistor R7, and the other end of the resistor R7 is respectively connected with the other end of a resistor R3, the other end of the capacitor C1 and a pin 3 of a liquid level sensor U1 and connected with the ground in parallel.
The integral comparison circuit utilizes a diode D2 in a detection operation circuit to conduct, a diode D2 and a capacitor C1 to conduct a thyristor Q2, a thyristor Q2 transmits a water level signal to an operational amplifier U8A through a resistor R8, an operational amplifier U8A, a capacitor C3 and a capacitor C5 integrate the water level signal, the detected water level signal is observed to have a tendency of rising continuously by mistake, if the operational amplifier U8A cannot conduct a voltage regulator D1, the water level does not have the tendency of rising continuously at the moment, the water level is safe at the moment, the water level signal does not need to be processed next step, when the operational amplifier U8A conducts the voltage regulator D1, the water level signal has the tendency of rising continuously at the moment, the next step of processing is needed, the voltage regulator D1 conducts a thyristor Q4 through a capacitor C4, the thyristor Q4 transmits the water level signal to operational amplifiers U7A and U4A through a resistor R16, the operational amplifier U A and the operational amplifier U A form a comparator window, and comparing the water level signal with an emergency threshold and a danger threshold, forming a voltage division circuit by using a resistor R10, a resistor R11 and a resistor R13 to respectively provide the emergency threshold and the danger threshold of the water level for the operational amplifier U7A and the operational amplifier U4A, wherein the amplitude of the emergency threshold and the represented water level value are greater than the amplitude of the danger threshold and the represented water level value, outputting a comparison signal by the window comparator, and outputting the comparison signal to the comprehensive control circuit.
The integral comparison circuit comprises a capacitor C2, one end of the capacitor C2 is respectively connected with a control electrode of a thyristor Q2 and a negative electrode of a diode D2 in the detection operation circuit, an anode of the thyristor Q2 and an inverting terminal of an operational amplifier U5A in the detection operation circuit, a cathode of a thyristor Q2 is respectively connected with one end of a resistor R8 and an anode of a thyristor Q4, the other end of a resistor R8 is respectively connected with one end of a capacitor C5 and an inverting terminal of an operational amplifier U8A, the inverting terminal of the operational amplifier U8A is respectively connected with one end of a resistor R6 and one end of a capacitor C3, an output end of the operational amplifier U8A is respectively connected with the other end of the capacitor C A, the negative electrode of a voltage regulator D A, and the positive electrode of the voltage regulator D A are respectively connected with one end of the capacitor C A and the control electrode of the thyristor Q A, the cathode of the thyristor Q A is connected with one end of the inverting terminal of the resistor R A, the inverting terminal of the operational amplifier U A and the inverting terminal of the adjustable operational amplifier U A are respectively connected with the inverting terminal of the operational amplifier U A, the right end of the resistor R13 is connected with the other end of the capacitor C4, the other end of the resistor R6, the other end of the capacitor C5, the other end of the capacitor C2 and the other end of the resistor R7 in the detection arithmetic circuit and connected with the ground, the left end of the resistor R13 is connected with one end of the resistor R11, the other end of the resistor R11 is connected with one end of the resistor R10 and the non-inverting end of the operational amplifier U7A, and the other end of the resistor R10 is connected with the other end of the resistor R4 in the detection arithmetic circuit and connected with the positive power supply VCC.
The integrated control circuit respectively utilizes the diode D3, the diode D4 and the NOT gate U6A to receive comparison signals, when the comparison signals do not conduct the diode D3 and the diode D4, and the comparison signals acted by the NOT gate U6A are output to the 11 pin of the OR gate U3C to be low level, the comparison signals indicate that the operational amplifier U4A outputs low level at the moment, the operational amplifier U7A outputs high level at the moment, namely, the water level does not reach a danger threshold at the moment, the OR gate U3C outputs low level at the moment, the resistor R15 does not need to start the automatic drainage pump, when the comparison signals conduct the diode D3 and the comparison signals of low level are received by the 11 pin of the NOT gate U6A and output to the OR gate U3C, namely, the water level reaches the danger threshold but does not reach the emergency threshold at the moment, the OR gate U3C outputs high level at the moment, the automatic drainage pump is started by the resistor R15 to start drainage for starting to start the drainage for the cable channel, the safety is ensured, and the alarm signal U9C is output at the moment, reminding a control center that the water level in a cable channel is above a dangerous threshold but does not reach the level of an emergency threshold, maintaining the cable channel, when a comparison signal turns on a diode D3, and a high-level comparison signal is output to an 11 pin of an OR gate U3C through a NOT gate U6A, indicating that the water level reaches the emergency threshold at the moment, the force is required to be increased immediately for draining the cable channel, at the moment, the OR gate U3C outputs a high level to start an automatic draining pump through a resistor R15, the water level signal is turned on through a relay K1, the relay K1 enables a switch S1 to be closed, the water level signal starts a manual draining pump through a resistor R18, and the automatic draining pump and the manual draining pump are used for draining simultaneously (the manual draining pump is different from the automatic draining pump in that the manual draining pump can be started by a worker pressing a switch key and is applied to the state that the water level reaches the emergency threshold), the safety of the cable in the cable channel is guaranteed, at the moment, the OR gate U9C outputs an alarm signal to remind the control center that the water level in the cable channel reaches the level of the emergency threshold value, the cable channel needs to be maintained emergently, and then the safety of the cable in the cable channel is guaranteed.
The comprehensive control circuit comprises a diode D3, the anode of a diode D3 is connected with the output end of an operational amplifier U4A in the integral comparison circuit, the cathode of a diode D3 is connected with the 10 pin of an OR gate U3C, the 11 pin of an OR gate U3C is connected with the output end of a NAND gate U6A, the input end of an NOT gate U6A is respectively connected with the anode of a diode D4 and the output end of an operational amplifier U7A in the integral comparison circuit, the output end of an OR gate U3C is connected with one end of a resistor R15, the other end of the resistor R15 is respectively connected with an automatic drainage pump and the 11 pin of an OR gate U9C, the output end of an OR gate U9C is connected with a control center, the 10 pin of a gate U9C is respectively connected with one end of a manual drainage pump and a resistor R18, the other end of the resistor is connected with one end of a switch S1, the other end of a switch S1 is respectively connected with one end of a relay K1 and the cathode of a diode D4, and the other end of the relay K1 is respectively connected with the capacitor C4 in the integral comparison circuit, The other end of the resistor R7 in the detection arithmetic circuit is connected and grounded.
When the invention is used in detail, the detection and operation circuit transmits a water level signal detected by a liquid level sensor U1 to an operational amplifier U2A by using a resistor R1, the operational amplifier U2A divides the water level signal into two paths and transmits the two paths of water level signals to an operational amplifier U5A, the operational amplifier U5A performs subtraction operation on the two paths of water level signals to obtain a water level change value in a cable channel, when the operational amplifier U5A can not conduct a triode Q1, the water level in the cable channel does not rise at the moment, the water level does not need to be processed, when the operational amplifier U5A conducts a triode Q1, the water level in the cable channel rises, at the moment, the triode Q1 conducts a diode D2, an integral comparison circuit is started, the integral comparison circuit conducts Q2 by using a diode D2 in the thyristor detection and operation circuit, the diode D2 and a capacitor C1 are conducted, and the thyristor Q2 transmits the water level signal to an operational amplifier U8A by using a resistor R8, the operational amplifier U8A, the capacitor C3 and the capacitor C5 integrate the water level signal, if the operational amplifier U8A can not conduct the voltage regulator tube D1, the water level signal does not have the trend of continuously rising at this time, the water level signal does not need to be processed next step, when the operational amplifier U8A conducts the voltage regulator tube D1, the water level signal has the trend of continuously rising at this time, the water level signal at this time needs to be processed next step, the voltage regulator tube D1 conducts the thyristor Q4 through the capacitor C4, the thyristor Q4 transmits the water level signal to the operational amplifier U7A and the operational amplifier U4A through the resistor R16, the operational amplifier U7A and the operational amplifier U4A form a window comparator, the water level signal is compared with an emergency threshold value and a danger threshold value, the window comparator outputs a comparison signal and outputs the comparison signal to a comprehensive control circuit, the comprehensive control circuit receives the comparison signal, and when the comparison signal does not conduct the diode D3 and the diode D4, meanwhile, when the 11 pin of the or gate U3C is at a low level, the or gate U3C outputs a low level, the resistor R15 does not need to start the automatic draining pump, when the comparison signal turns on the diode D3, the comparison signal of the low level is output to the 11 pin of the or gate U3C through the not gate U6A, the or gate U3C outputs a high level, the automatic draining pump is started through the resistor R15, the draining of the cable channel is started, the safety of the cable is ensured, the or gate U9C outputs an alarm signal to the control center, when the comparison signal turns on the diode D3, the comparison signal of the high level is output to the 11 pin of the or gate U3C through the not gate U6A, it is indicated that the emergency threshold is reached at this time, the force needs to be increased immediately for draining the cable channel, the or gate U3C outputs a high level, the automatic draining pump is started through the resistor R15, the water level is turned on through the relay K1, the relay K1 closes the switch S1, the water level signal passes through resistance R18 and will manual drain pump start, utilizes automatic drain pump and manual drain pump to carry out drainage work simultaneously this moment OR gate U9C output alarm signal to control center, and then guarantees the security of the cable in the cable channel.
The liquid level sensor U1 is arranged to replace a floating ball liquid level switch to be used as a water level detection sensor to detect a water level signal in a cable channel, the inaccuracy of the water level signal received by a control center caused by the floating ball liquid level switch is reduced, the problem of inaccurate water level signal detected by the floating ball liquid level switch as the water level detection sensor in the prior art is avoided, the accuracy of a water level detection unit is improved, and the problem of misoperation of an automatic drainage pump is also avoided, on the basis of the automatic drainage pump, a manual drainage pump is started, the force is increased to drain water in the cable channel, the safety of the cable in the cable channel is ensured, and further the electricity utilization safety of people is ensured, a detection operation circuit and an integral comparison circuit are arranged to clearly detect whether the water level has an ascending trend and the state of the water level, when the water level does not have the ascending trend and the water level safety, the automatic draining pump is not started, the automatic draining pump is prevented from doing useless work, and the window comparator in the integral comparison circuit is used for gradually starting the automatic draining pump and the manual draining pump, so that the automatic draining pump and the manual draining pump are reasonably utilized.
Claims (4)
1. A distributed cable channel online monitoring system comprises a temperature detection unit, a humidity detection unit, a gas detection unit and a water level detection unit and is characterized in that the water level detection unit comprises a detection operation circuit, an integral comparison circuit and a comprehensive control circuit, the detection operation circuit detects a water level signal in a cable channel by using a liquid level sensor U1, the integral comparison circuit is started after the water level signal is subjected to subtraction operation, the water level signal is transmitted to the integral comparison circuit, the integral comparison circuit integrates and compares the water level signal to obtain a comparison signal, the comprehensive control circuit is started by the comparison signal, and the comprehensive control circuit respectively starts an automatic draining pump and a manual draining pump and outputs an alarm signal to a control center.
2. The system as claimed in claim 1, wherein the detection and operation circuit includes a resistor R1, one end of the resistor R1 is connected to pin 2 of the liquid level sensor U1, pin 1 of the liquid level sensor U1 is connected to one end of the resistor R4 and the positive power VCC, the other end of the resistor R1 is connected to the inverting terminal of the operational amplifier U2A, the inverting terminal of the operational amplifier U2A is connected to the output terminal of the operational amplifier U2A, one end of the resistor R2, the inverting terminal of the operational amplifier U5A and one end of the resistor R3, the inverting terminal of the operational amplifier U5A is connected to the other end of the resistor R2 and one end of the capacitor C1, the output terminal of the operational amplifier U5A is connected to the base of the transistor Q1, the collector of the transistor Q1 is connected to the other end of the resistor R4 and the positive electrode of the diode D2, the emitter of the transistor Q1 is connected to one end of the resistor R7, and the other end of the resistor R7 is connected to the other end of the resistor R3, The other end of the capacitor C1 is connected in parallel with pin 3 of the level sensor U1 and is connected to ground.
3. The distributed cable channel on-line monitoring system as claimed in claim 1, wherein said integral comparison circuit includes a capacitor C2, one end of the capacitor C2 is connected to the control electrode of the thyristor Q2 and the negative electrode of the diode D2 in the detection operation circuit, the anode of the thyristor Q2 is connected to the inverting terminal of the operational amplifier U5A in the detection operation circuit, the cathode of the thyristor Q2 is connected to one end of the resistor R8 and the anode of the thyristor Q4, the other end of the resistor R8 is connected to one end of the capacitor C5 and the inverting terminal of the operational amplifier U8A, the inverting terminal of the operational amplifier U8A is connected to one end of the resistor R6 and one end of the capacitor C3, the output terminal of the operational amplifier U8A is connected to the other end of the capacitor C3, the negative electrode of the regulator D1 and the positive electrode of the regulator D1 are connected to one end of the capacitor C4 and the control electrode of the Q4, the cathode of the thyristor Q4 is connected to one end of the thyristor R16, the other end of the resistor R16 is connected with the inverting end of the operational amplifier U7A and the non-inverting end of the operational amplifier U4A respectively, the inverting end of the operational amplifier U4A is connected with the adjustable end of the resistor R13, the right end of the resistor R13 is connected with the other end of the capacitor C4, the other end of the resistor R6, the other end of the capacitor C5, the other end of the capacitor C2 and the other end of the resistor R7 in the detection arithmetic circuit in parallel and connected to ground, the left end of the resistor R13 is connected with one end of the resistor R11, the other end of the resistor R11 is connected with one end of the resistor R10 and the non-inverting end of the operational amplifier U7A respectively, and the other end of the resistor R10 is connected with the other end of the resistor R4 in the detection arithmetic circuit in connected to the positive power supply VCC.
4. The distributed cable channel on-line monitoring system as claimed in claim 1, wherein said integrated control circuit includes a diode D3, the anode of the diode D3 is connected to the output terminal of an operational amplifier U4A in the integral comparison circuit, the cathode of the diode D3 is connected to the pin 10 of an or gate U3C, the pin 11 nand gate U6A of the or gate U3C is connected to the input terminal of an or gate U3C, the anode of the diode D4 and the output terminal of an operational amplifier U7A in the integral comparison circuit are connected to the input terminal of an or gate U3C, the output terminal of a resistor R15 is connected to one end of a resistor R15, the other end of the resistor R15 is connected to an automatic drain pump or the pin 11 of a gate U9C, the output terminal of a gate U9C is connected to the control center, or the pin 10 of a gate U9C is connected to one end of a manual drain pump or a resistor R18, the other end of the resistor is connected to one end of a switch S1, and the other end of the switch S1 is connected to one end of a relay K1, The negative electrode of the diode D4 and the other end of the relay K1 are connected to the other end of the capacitor C4 in the integration comparator circuit and the other end of the resistor R7 in the detection arithmetic circuit, respectively, and are connected to ground.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111329801.9A CN113775532B (en) | 2021-11-11 | 2021-11-11 | Distributed cable channel on-line monitoring system |
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| CN202111329801.9A CN113775532B (en) | 2021-11-11 | 2021-11-11 | Distributed cable channel on-line monitoring system |
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| CN113775532A CN113775532A (en) | 2021-12-10 |
| CN113775532B true CN113775532B (en) | 2022-02-22 |
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Denomination of invention: A Distributed Cable Channel Online Monitoring System Effective date of registration: 20230518 Granted publication date: 20220222 Pledgee: Bank of Beijing Co.,Ltd. Jinan Branch Pledgor: JINAN YINGHUA AUTOMATION TECHNOLOGY Co.,Ltd. Registration number: Y2023980040942 |