CN119023006A - Water conservancy dam seepage pressure detection and early warning system - Google Patents
Water conservancy dam seepage pressure detection and early warning system Download PDFInfo
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- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
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Abstract
The invention relates to a water conservancy dam seepage pressure detection early warning system, wherein a comparison analysis module is adopted to obtain a current measuring point pressure signal, controllable amplification is carried out, the current measuring point pressure signal is fed into an analogy analysis module when abnormal, a water flow electric signal and a water pressure signal of a last measuring point are received, the current measuring point pressure signal is calculated, when abnormal, a ground signal is fed into the analogy analysis module, when both abnormal, a red light is driven to indicate, so as to carry out qualitative early warning, the accurate pressure detection and prediction in a pressure measuring pipe can be ensured, the deviation degree of the current measuring point pressure signal and a standard value is calculated by adopting a double-parameter evaluation module, the deviation degree of the current measuring point pressure signal and a tolerable change rate signal is calculated, finally, the two deviation degree signals are coupled, the pressure regulation basis of a pressure regulating valve is carried out in a pressure regulation range of a water conservancy system, and the three-level alarm is subjected to report, shut-off and dangerous case alarm according to the deviation degree in a pressure non-regulation range of the water conservancy system, so that abnormal conditions can be found in time and measures can be taken.
Description
Technical Field
The invention belongs to the technical field of hydraulic dykes and dams engineering, and particularly relates to a hydraulic dykes and dams seepage pressure detection and early warning system.
Background
The dam seepage of water conservancy is the phenomenon that water in front of the dam permeates into the dam body through the pore, crack and other channels in the dam under the action of seepage pressure when the high water level of the flood season is long in duration, and the dam can be damaged greatly by long-time seepage, so that how to effectively monitor and control seepage is an important subject in hydraulic engineering.
In the prior art, a water pressure sensor is arranged at multiple points in a dam or at a dam foundation, seepage pressure of the dam body is monitored for a long time, the multiple-point water pressure sensor can monitor seepage flow of the dam in real time, through real-time monitoring and data analysis, the seepage problem in the dam can be found out in time, a pressure regulating valve is arranged in a downstream or peripheral water conservancy system of the dam, the flow and the pressure of water are regulated and controlled in time, the seepage condition is indirectly influenced, but the analysis and the treatment are only carried out on data detected at a single measuring point and a single time point, interference and measuring errors exist, further analysis and tracking of historical data and multiple-point data are not combined, detection and prediction can not be carried out on pressure and flow parameter combination reflecting seepage, abnormal conditions can not be found out in time, measures can be taken, and accident risks are reduced.
Disclosure of Invention
Aiming at the situation, in order to overcome the defects of the prior art, the invention provides the water conservancy dam seepage pressure detection early warning system, qualitative early warning is carried out through comparison analysis and analogy analysis, and two deviation degree signal coupling is adopted to carry out the repair, valve closing and dangerous case alarming of the three-level alarm, so that the abnormal situation can be found in time and measures can be taken.
The technical scheme is that the intelligent monitoring system comprises a water pressure sensor, a flow sensor, a safety analysis early warning device, a pressure regulating valve and a three-level alarm, wherein the water pressure sensor and the flow sensor are arranged in a dam or at a dam foundation, the water pressure sensor detects water pressure in a pressure measuring pipe, the existence and trend of seepage are deduced through the change of the water pressure, the flow sensor detects the flow of water in the pressure measuring pipe, the existence and trend of seepage are deduced through the change of the flow, the pressure regulating valve is arranged in a downstream or peripheral water conservancy system of the dam, the flow and the pressure of the water are regulated, the seepage situation is indirectly influenced, a current measuring point pressure signal and a water flow electric signal enter the safety analysis early warning device after amplified and conditioned, the detected and calculated current measuring point pressure signal is respectively compared with upper and lower threshold values in a pipe pressure range, analog analysis is carried out after disturbance elimination, qualitative early warning is carried out on the detected and deviation degree of the current pressure signal and standard value, the change rate of the current pressure signal and the current measuring point pressure signal is adopted, the current measuring point pressure regulating pressure, the three-level alarm is adopted, the measuring point is used for monitoring, and the valve is turned off, and the dangerous alarm is carried out.
Preferably, the analog analysis module includes a photo coupler U1, a pin 4 of the photo coupler U1 is connected to a power supply +5v, a pin 3 of the photo coupler U1 is connected to one end of a resistor R11, the other end of the resistor R11 is respectively connected to the positive electrode of a ground electrolytic capacitor E1 and the negative electrode of a voltage stabilizing tube SV2, and the positive electrode of the voltage stabilizing tube SV2 outputs a signal to an alarm to drive a red light indication for qualitative early warning.
Preferably, the dual-parameter evaluation module comprises a thyristor VT1, a control electrode of the thyristor VT1 is connected with an anode of a voltage stabilizing tube SV2, a second base electrode of the thyristor VT1 is connected with the other end of a resistor R9, a first base electrode of the thyristor VT1 is connected with an inverting input end of an operational amplifier AR4, a non-inverting input end of the operational amplifier AR4 and a pin 4 of a multiplier D1 are connected with standard value signals, an output end of the operational amplifier AR4 is connected with one end of a resistor R12, the other end of the resistor R12 is respectively connected with one end of a resistor R13 and an inverting input end of an operational amplifier AR5, the other end of the resistor R13 is connected with a pin 3 of a multiplier D1, the non-inverting input end of the operational amplifier AR5 is connected with ground through a resistor R14, and the output end of the operational amplifier AR5 is respectively connected with a pin 1 of the multiplier D1 and one end of an inductor L3, and the other end of the inductor L3 outputs signals to the pressure regulating valve and the three-stage alarm;
The non-inverting input end of the operational amplifier AR6 is connected with the ground, the inverting input end of the operational amplifier AR6 is respectively connected with the other end of a resistor R9, one end of a resistor R15 and one end of a capacitor C2, the output end of the operational amplifier AR6 is respectively connected with the other end of the resistor R15, the other end of the capacitor C2 and one end of a resistor R16, the other end of the resistor R16 is respectively connected with one end of a resistor R18 and the inverting input end of an operational amplifier AR7, the other end of the resistor R18 is connected with a pin 3 of a multiplier D2, the non-inverting input end of the operational amplifier AR7 is connected with the ground through a resistor R17, the output end of the operational amplifier AR7 is respectively connected with a pin 1 of a multiplier D2 and one end of an inductor L4, the other end of the inductor L4 outputs signals to a pressure regulating valve and a three-stage alarm, and the pin 2 of the multiplier D2 is connected with a tolerable change rate signal.
The invention has the beneficial effects that: 1, the pressure signal of the current measuring point is obtained to be in a peak value and limited to be 0 to +5V, and is amplified through a limiting amplification circuit, and finally the amplified amplitude is controlled by a predicted change rate signal applied to the grid electrode of a field effect tube P1, the predicted change rate signal is calculated by overlapping a historical predicted change rate value of a historical change rate value of the pressure signal of the current measuring point, the magnitude of the pressure signal of the current measuring point is regulated through the predicted change rate, finally, whether the pressure signal of the current measuring point is in a tube pressure range or not is detected by voltage stabilizing tubes Z3-1 and Z3, when abnormal, the pressure signal of the current measuring point is applied to a pin 1 of a photoelectric coupler U1, a water flow electric signal and a water pressure signal of a last measuring point are received, the square = flow area (the water pressure signal of the last measuring point-the water pressure signal of the current measuring point)/water density is represented by a constant because the water density is fixed, the difference value between the water pressure signal of the last measuring point and the water pressure signal of the current measuring point can be calculated by the divider IC1, then the difference value is subtracted from the water pressure signal of the last measuring point of the triodes Q2 and Q3, the calculated current measuring point pressure signal is detected by the voltage stabilizing tubes Z2-1 and Z2 whether to be in the tube pressure range, when abnormal, the voltage stabilizing tubes Z2-1 and Z2 are reversely broken down, the triode Q1 is conducted, the collector voltage of the triode Q1 is pulled to the ground, the ground signal is added to the pin 2 of the photoelectric coupler U1, the detected and calculated current measuring point pressure signal analog analysis is carried out by the voltage difference between the input end of the photoelectric coupler U1, namely the pin 1 and the pin 2, when the two are abnormal, the photoelectric coupler U1 is conducted, and when the non-transient high level is eliminated, the disturbance is eliminated, the signal is output to the alarm through the voltage stabilizing tube SV2, the red light is driven to indicate to carry out qualitative early warning, otherwise, the green light is on, the working pressure of the water conservancy system is indicated to be normal, and the analog analysis can ensure that the detection and the prediction of the pipeline working pressure are accurate;
When the voltage stabilizing tube SV2 outputs signals to the alarm, one path of the voltage stabilizing tube SV2 outputs a difference value between the current measuring point pressure signal and the median working pressure of the water conservancy system, namely a standard value signal, the operational amplifier AR4 calculates the difference value, the divider calculates the deviation degree between the current measuring point pressure signal and the standard value, the other path of the voltage stabilizing tube SV2 calculates the change rate of the current measuring point pressure signal through the integrator, the divider calculates the deviation degree between the change rate of the current measuring point pressure signal and a tolerable change rate signal, wherein the tolerable change rate signal is obtained by differential calculation of the detecting pressure signal and an alarm signal corresponding to a closing valve through differential circuit, the last two deviation degree signals are coupled and are used as the basis of pressure regulation of the pressure regulating valve in the pressure regulating range of the water conservancy system, and the three-stage alarm is used for repairing, closing the valve and dangerous case alarms according to the deviation degree in the pressure non-regulating range of the water conservancy system, so that abnormal situations can be found in time and measures can be taken, and the accident risks can be reduced.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Fig. 2 is a general view of the structure of the module of the present invention.
FIG. 3 is a block diagram of the safety analysis precaution device of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made more apparent and fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown.
The following describes the embodiments of the present invention in further detail with reference to fig. 1 to 3 of the accompanying drawings.
The hydraulic pressure sensor and the flow sensor are arranged in the dam or at the dam foundation, the hydraulic pressure sensor is specifically arranged in a pressure measuring tube, the pressure measuring tube is arranged in the dam or at the dam foundation, the hydraulic pressure sensor detects the water pressure in the pressure measuring tube, the existence and trend of seepage are deduced through the change of the water pressure, the flow sensor detects the flow of water in the pressure measuring tube, the existence and trend of seepage are deduced through the change of the flow, the pressure regulating valve is arranged in a downstream or peripheral hydraulic system of the dam, the flow and the pressure of water are regulated, the seepage condition is indirectly influenced, the pressure signal and the electric signal of the current measuring point enter the safety analysis early warning device after the electric signal of the water flow enter the safety analysis early warning device, the safety analysis early warning device adopts a comparison analysis module to carry out comparison analysis, and the safety analysis early warning device is specific, the current measuring point pressure signal is obtained by a peak value detection circuit, the amplitude limit is between 0 and +5V, the peak value is amplified by an amplitude limiting amplifier, the amplitude is amplified by a controllable amplitude modulation circuit consisting of an operational amplifier AR3, a resistor R5-resistor R8 and a field effect transistor P1, wherein the amplified amplitude is controlled by a predicted change rate signal applied to the grid electrode of the field effect transistor P1, when the predicted change rate signal is increased, the effective resistance of an FET of the field effect transistor P1 can be reduced due to reverse charging, the gain of the controllable amplitude modulation circuit can be increased, the predicted change rate signal is calculated by the historical change rate value superposition historical predicted change rate value of the current measuring point pressure signal, the magnitude of the current measuring point pressure signal is regulated by the predicted change rate for solving the accident influence caused by hysteresis detection and hysteresis pressure regulation, finally whether the voltage stabilizing transistors Z3-1 and Z3 detect the current measuring point pressure signal is in a tube pressure range or not, when the voltage stabilizing tube is abnormal, the voltage stabilizing tubes Z3-1 and Z3 are reversely broken down, the current measuring point pressure signal is added to the pin 1 of the photoelectric coupler U1, a water flow electric signal and the water pressure signal of the last measuring point are received, the square of the flow = flow area (the water pressure signal of the last measuring point-the water pressure signal of the current measuring point)/the water density is equal, the water density is fixed, the flow area is fixed, the constant is used for representing the difference value between the water pressure signal of the last measuring point and the water pressure signal of the current measuring point can be calculated by the divider IC1, then the difference value is subtracted by the subtracter of the triode Q2 and Q3, the calculated current measuring point pressure signal is detected by the voltage stabilizing tubes Z2-1 and Z2 whether the voltage is in a tube voltage range or not, when the voltage stabilizing tubes Z2-1 and Z2 are reversely broken down, the triode Q1 is conducted, the collector voltage of the triode Q1 is pulled to the ground, and the ground signal is added to the pin 2 of the photoelectric coupler U1;
The safety analysis early warning device adopts analog analysis by an analog analysis module, specifically, the analog analysis of the pressure signal of the current measuring point is detected and calculated by the voltage difference of the input end of the photoelectric coupler U1, namely the pin 1 and the pin 2, when the input end of the photoelectric coupler U1 and the pin 3 are abnormal, the photoelectric coupler U1 is conducted, the output end of the photoelectric coupler U1, namely the pin 3, outputs high level, the high level is charged by the resistor R11 and the electrolytic capacitor E1, the non-transient high level, namely the disturbance is eliminated, the signal is output to the alarm by the voltage stabilizing tube SV2, the red lamp is driven to indicate, so as to carry out qualitative early warning, otherwise, the green lamp is on, the working pressure of the hydraulic system is indicated to be normal, and the analog analysis can ensure that the detection and the prediction of the working pressure of the pipeline are accurate;
The safety analysis early warning device adopts a double-parameter evaluation module to carry out pressure regulation and grade early warning, specifically, when a voltage stabilizing tube SV2 outputs a signal to an alarm, a thyristor VT1 is triggered to be conducted simultaneously, one path of the current measuring point pressure signal and the median working pressure of a water conservancy system, namely a standard value signal, the difference value is calculated by an operational amplifier AR4, the deviation degree of the current measuring point pressure signal and the standard value is calculated by a divider, the change rate of the current measuring point pressure signal is calculated by an integrator, the deviation degree of the change rate of the current measuring point pressure signal and a tolerable change rate signal is calculated by the divider, wherein the tolerable change rate signal is obtained by detecting the difference value of an alarm signal corresponding to a valve, and then carrying out differential calculation on the response time of the valve by a differential circuit, finally, the two deviation degree signals are coupled, the basis of pressure regulation of the pressure regulating valve is made in the pressure adjustable range of the water conservancy system, the correction, the valve closing and dangerous alarm of the three-level alarm device are carried out according to the deviation degree, so that the abnormal situation is found in time and the accident risk is reduced.
Based on the scheme, the comparison analysis module receives the pressure signal of the current measuring point, can be collected by the HSP-W210MA pressure sensor, and has wide working range: 100 KPa-4 KPa-100 MPa (differential pressure range), meeting the requirements of water supply system use (0.15-0.5 MPa) and test (1.5 times of use requirements), and outputting types: 4-20 mA (current), 0-5V, 0-10V, the application selects 0-5V, the precision: 0.25%, FS operating temperature: the temperature of 20 ℃ below zero to 80 ℃ below zero, and the pressure signal of the current measuring point passes through an operational amplifier AR1, The peak value is obtained by a voltage stabilizing tube Z1 and a capacitor C1 peak value detection circuit, the peak value is limited between 0 and +5V by a diode D1 and a diode D2 which are connected in series, and is amplified by a limiting amplifier consisting of an operational amplifier AR2 and a resistor R1-resistor R4, wherein the bistable tube SV1 is connected at two ends of a feedback resistor R2 in parallel and is used for limiting the amplified amplitude, and finally the amplitude is amplified by a controllable amplitude modulation circuit consisting of an operational amplifier AR3, a resistor R5-resistor R8 and a field effect tube P1, wherein the amplified amplitude is controlled by a predictive change rate signal added to the grid electrode of the field effect tube P1, when the predictive change rate signal is increased, the amplitude is reversed by a resistor R6 and an electrolytic capacitor E2, The effective resistance of FET of the field effect tube P1 can be reduced, which can increase the gain of the controllable amplitude modulation circuit, otherwise, when the signal of the predicted change rate is reduced, the effective resistance of FET of the field effect tube P1 is increased through the reverse direction of the resistor R6 and the electrolytic capacitor E2, which can reduce the gain of the controllable amplitude modulation circuit, the signal of the predicted change rate is calculated by the historical change rate value superposition historical predicted change rate value of the pressure signal of the current measuring point, the magnitude of the pressure signal of the current measuring point is regulated through the predicted change rate, the signal is used for solving the accident influence caused by the hysteresis detection and the regulation of the hysteresis pressure regulating valve, finally, whether the signal is in the tube pressure range is detected by the voltage stabilizing tubes Z3-1 and Z3, Wherein the voltage stabilizing values of the voltage stabilizing tubes Z3-1 and Z3 respectively correspond to a lower threshold value and an upper threshold value, when the voltage stabilizing tubes Z3-1 and Z3 are abnormal, the voltage stabilizing tubes Z3-1 and Z3 are reversely broken down, a current measuring point pressure signal is added to a pin 1 of the photoelectric coupler U1, the voltage stabilizing tube comprises an operational amplifier AR1, the non-inverting input end of the operational amplifier AR1 is connected with the current measuring point pressure signal detected by the pressure sensor, the output end of the operational amplifier AR1 is connected with the positive electrode of the voltage stabilizing tube Z1, the negative electrode of the voltage stabilizing tube Z1 is respectively connected with the inverting input end of the operational amplifier AR1, one end of a grounding capacitor C1, the negative electrode of a diode D1, the positive electrode of a diode D2 and one end of a resistor R1, the negative electrode of the diode D2 is connected with a power supply +5V, the positive electrode of the diode D1 is connected with the ground, the other end of the resistor R1 is respectively connected with the non-inverting input end of the operational amplifier AR2, one end of the resistor R2 and the left end of the bistable tube SV1, the inverting input end of the operational amplifier AR2 is connected with the ground through the resistor R3, the output end of the operational amplifier AR2 is connected with one end of the resistor R4, the other end of the resistor R4 is respectively connected with the other end of the resistor R2, the right end of the bistable tube SV1 and one end of the resistor R5, the other end of the resistor R5 is connected with the non-inverting input end of the operational amplifier AR3, the inverting input end of the operational amplifier AR3 is respectively connected with one end of the resistor R7 and one end of the resistor R8, The other end of the resistor R8 is respectively connected with the D end of the field effect tube P1, the S end of the field effect tube P1 is connected with the ground, the G end of the field effect tube P1 is respectively connected with one end of the resistor R6 and the negative electrode of the grounding electrolytic capacitor E2, the other end of the resistor R6 is connected with a predicted change rate signal of the measuring point pressure, the output end of the operational amplifier AR3 is respectively connected with the other end of the resistor R7 and one end of the resistor R9, the other end of the resistor R9 is connected with the negative electrode of the voltage stabilizing tube Z3, and the positive electrode of the voltage stabilizing tube Z3 is connected with the pin 1 of the photoelectric coupler U2;
The comparison analysis module receives a water flow electric signal and a water pressure signal of a last measuring point, the square = flow area (the water pressure signal of the last measuring point-the water pressure signal of the current measuring point)/the water density is fixed, the water density is represented by a constant, the difference value between the water pressure signal of the last measuring point and the water pressure signal of the current measuring point can be calculated by the divider IC1, then the difference value is subtracted by the water pressure signal of the last measuring point of the triodes Q2 and Q3, the calculated current measuring point pressure signal is detected by the voltage stabilizing tubes Z2-1 and Z2 to be in a transistor pressure range, when the current measuring point pressure signal is abnormal, the voltage stabilizing tubes Z2-1 and Z2 are reversely broken down, the triode Q1 is conducted, the collector voltage of the triode Q1 is pulled to the ground, the ground signal is added to the pin 2 of the photoelectric coupler U1, the pin 6 of the divider IC1 is connected with the last pressure signal, the pin 1 of the divider IC1 is connected with the flow speed signal, the pin 7, the pin 8 and the pin 9 and the pin 10 of the divider IC1 are connected with the ground, the pin 2 of the IC1 is connected with the power supply +15V, the pin 2 of the divider IC1 is connected with the pin 2, the pin 2 of the voltage stabilizing tube 1 is connected with the voltage stabilizing tube 2, the base 2 of the divider 1 is connected with the triode Q2, and the base 2 of the triode Q1 is connected with the voltage stabilizing tube 2 through the base 2 of the voltage stabilizing tube 2, and the base 2 of the triode Q1 is connected with the potential 2.
On the basis of the scheme, the analog analysis module detects and calculates the analog analysis of the pressure signal of the current measuring point by the voltage difference of the input end of the photoelectric coupler U1, namely the pin 1 and the pin 2, when the input end of the photoelectric coupler U1 and the pin 2 are abnormal, the photoelectric coupler U1 is conducted, the output end of the photoelectric coupler U1, namely the pin 3, outputs high level, namely the high level is charged through the resistor R11 and the electrolytic capacitor E1, the non-transient high level, namely after disturbance is eliminated, the high level outputs a signal to the alarm through the voltage stabilizing tube SV2, the red lamp is driven to indicate, so as to perform qualitative early warning, otherwise, the green lamp is on, the working pressure of the hydraulic system is normal, the method comprises the following steps that the pin 4 of the photoelectric coupler U1 is connected with a power supply +5V, the pin 3 of the photoelectric coupler U1 is connected with one end of the resistor R11, the other end of the resistor R11 is respectively connected with the anode of the electrolytic capacitor E1, the anode of the cathode of the voltage stabilizing tube SV2 is charged, and the anode output signal of the voltage stabilizing tube SV2 is sent to the alarm, so as to drive the red lamp to indicate, so as to perform qualitative early warning.
On the basis of the scheme, when the voltage stabilizing tube SV2 outputs a signal to the alarm, the double-parameter evaluation module triggers the thyristor VT1 to conduct simultaneously, one path, the current measuring point pressure signal and the median working pressure of the hydraulic system, namely the standard value signal, are calculated by the operational amplifier AR4, the divider consisting of the operational amplifier AR5, the multiplier D1 and the resistor R12-resistor R14 is used for calculating the deviation degree of the current measuring point pressure signal and the standard value, the other path, the integrator consisting of the operational amplifier AR6, the resistor R15 and the capacitor C2 is used for calculating the change rate of the current measuring point pressure signal, the divider consisting of the operational amplifier AR7, the multiplier D2 and the resistor R16-resistor R18 is used for calculating the deviation degree of the current measuring point pressure signal and the tolerable change rate signal, the tolerable change rate signal is obtained by detecting the difference value of the alarm signal corresponding to the pressure signal and the related valve and performing differential calculation on the response time of the related valve through the differential circuit, and finally, the two deviation degree signals are coupled, the basis of the pressure regulation is made in the pressure adjustable range of the hydraulic system, and the deviation degree of the two deviation degree signals reaches the alarm signal when the two deviation degree of the hydraulic system is not equal to 60% or equal to the deviation degree of the alarm signal is reached to the single correction value of the alarm value of 1, and the deviation degree of the alarm value is reached to the alarm value of 60% when the deviation degree is equal to the deviation degree of the alarm value of the two is reached to the alarm value of the threshold 1; when the single deviation degree reaches 2.6 or both reach 1.9, closing the valve; when the single deviation degree reaches 3.2 or both reach 2.6, adopting dangerous case alarm; when obvious improvement exists, the risk level of the three-stage alarm can be reduced, the alarm comprises a thyristor VT1, a control electrode of the thyristor VT1 is connected with the positive electrode of a voltage stabilizing tube SV2, a second base electrode of the thyristor VT1 is connected with the other end of a resistor R9, a first base electrode of the thyristor VT1 is connected with an inverting input end of an operational amplifier AR4, a non-inverting input end of the operational amplifier AR4 and a pin 4 of a multiplier D1 are connected with standard value signals, an output end of the operational amplifier AR4 is connected with one end of a resistor R12, the other end of the resistor R12 is respectively connected with one end of a resistor R13 and an inverting input end of an operational amplifier AR5, the other end of the resistor R13 is connected with a pin 3 of a multiplier D1, the non-inverting input end of the operational amplifier AR5 is connected with ground through a resistor R14, the output end of the operational amplifier AR5 is respectively connected with one end of a pin 1 and an inductor L3, and the other end of the inductor L3 outputs signals to the pressure regulating valve and the three-stage alarm;
The non-inverting input end of the operational amplifier AR6 is connected with the ground, the inverting input end of the operational amplifier AR6 is respectively connected with the other end of a resistor R9, one end of a resistor R15 and one end of a capacitor C2, the output end of the operational amplifier AR6 is respectively connected with the other end of the resistor R15, the other end of the capacitor C2 and one end of a resistor R16, the other end of the resistor R16 is respectively connected with one end of a resistor R18 and the inverting input end of an operational amplifier AR7, the other end of the resistor R18 is connected with a pin 3 of a multiplier D2, the non-inverting input end of the operational amplifier AR7 is connected with the ground through a resistor R17, the output end of the operational amplifier AR7 is respectively connected with a pin 1 of a multiplier D2 and one end of an inductor L4, the other end of the inductor L4 outputs signals to a pressure regulating valve and a three-stage alarm, and the pin 2 of the multiplier D2 is connected with a tolerable change rate signal. Based on the scheme, the deviation degree of the current measuring point pressure signal and the standard value and the change rate value of the current measuring point pressure signal are adopted, the pressure regulation of the pressure regulating valve, the repair of the three-level alarm, the closing of the valve and the dangerous case alarm are adopted, and the duration time can be set as forward excitation based on the regulation; the false alarm rate is most reversely excited; the positive change of the change trend is used as positive excitation, the negative change is used as reverse excitation, the risk level of the three-level alarm can be reduced and increased, historical data and multi-point data can be combined for further analysis and tracking, the detection and the prediction of the pipeline working pressure are accurate, abnormal conditions can be found in time, measures can be taken, and the accident risk is reduced.
While the invention has been described in connection with certain embodiments, it is not intended that the invention be limited thereto; for those skilled in the art to which the present invention pertains and the related art, on the premise of based on the technical scheme of the present invention, the expansion, the operation method and the data replacement should all fall within the protection scope of the present invention.
Claims (7)
1. The utility model provides a water conservancy dyke seepage pressure detects early warning system, including water pressure sensor, flow sensor, safety analysis precaution device, the air-vent valve, tertiary alarm, a serial communication port, water pressure sensor, flow sensor sets up in dykes and dams or dam foundation department, water pressure sensor detects the pressure in the piezometer tube, infer existence, trend of seepage through the change of water pressure, flow sensor detects the flow of piezometer tube normal water, infer existence, trend of seepage through the change of flow, the air-vent valve sets up in dykes and dams low reaches or peripheral water conservancy system, adjust the flow and the pressure of water, the condition of seepage is indirectly influenced, current measurement point pressure signal, the discharge signal later gets into safety analysis precaution device, after amplified conditioning, the current pressure signal of detection, calculation is first with the upper and lower threshold value contrast analysis in the pipe pressure range respectively, the two are again combined and are carried out analog analysis, carry out the warning after eliminating the disturbance, and take the deviation degree of current pressure signal and standard value, the change value of current measurement point is taken, take the pressure regulating valve pressure, tertiary alarm's report, valve, the valve, dangerous alarm is taken.
2. The water conservancy dam seepage pressure detection and early warning system according to claim 1, wherein the comparison analysis in the safety analysis early warning device is completed by a comparison analysis module;
the analogy analysis in the safety analysis early warning device is completed by an analogy analysis module;
and triggering the pressure regulating valve to regulate pressure in the safety analysis early warning device and completing the alarm of the three-level alarm by the double-parameter evaluation module.
3. The system of claim 2, wherein the comparison analysis module comprises an operational amplifier AR1, the non-inverting input end of the operational amplifier AR1 is connected with the current measuring point pressure signal detected by the water pressure sensor, the output end of the operational amplifier AR1 is connected with the positive pole of a voltage stabilizing tube Z1, the negative pole of the voltage stabilizing tube Z1 is respectively connected with the inverting input end of the operational amplifier AR1, one end of a grounding capacitor C1, the negative pole of a diode D1, the positive pole of a diode D2 and one end of a resistor R1, the negative pole of the diode D2 is connected with a power supply +5V, the positive pole of the diode D1 is connected with the ground, the other end of the resistor R1 is respectively connected with the non-inverting input end of the operational amplifier AR2, one end of the resistor R2 and the left end of a bistable tube SV1, the inverting input end of the operational amplifier AR2 is connected with the ground through a resistor R3, the output end of the operational amplifier AR2 is connected with one end of a resistor R4, the other end of the resistor R4 is respectively connected with the other end of the resistor R2, the right end of a bistable tube SV1 and one end of a resistor R5, the other end of the resistor R5 is connected with the in-phase input end of an operational amplifier AR3, the inverting input end of the operational amplifier AR3 is respectively connected with one end of a resistor R7 and one end of a resistor R8, the other end of the resistor R8 is respectively connected with the D end of a field effect tube P1, the S end of the field effect tube P1 is connected with the ground, the G end of the field effect tube P1 is respectively connected with one end of a resistor R6 and the negative electrode of a grounding electrolytic capacitor E2, the other end of the resistor R6 is connected with a predicted change rate signal of a measuring point pressure, the output end of the operational amplifier AR3 is respectively connected with the other end of a resistor R7 and one end of a resistor R9, the other end of the resistor R9 is connected with the negative electrode of a voltage stabilizing tube Z3, and the positive electrode of the voltage stabilizing tube Z3 is connected with the pin 1 of a photoelectric coupler U2;
The device comprises a divider IC1, a pin 6 of the divider IC1 is connected with a measuring point pressure signal, a pin 1 of the divider IC1 is connected with a flow rate signal, a pin 7, a pin 8, a pin 9 and a pin 10 of the divider IC1 are connected with the ground, a pin 2 of the divider IC1 is connected with a power supply +15V, a pin 5 of the divider IC1 is connected with a power supply-15V, a pin 4 of the divider IC1 is respectively connected with the cathode of a voltage stabilizing tube Z2 and the upper end of a potentiometer RP1, the lower end of the potentiometer RP1 is connected with the ground, an adjustable end of the potentiometer RP1 is connected with a pin 3 of the divider IC1, the anode of the voltage stabilizing tube Z2 is connected with the base of a triode Q1, the emitter of the triode Q1 is connected with the ground through a resistor R10, and the collector of the triode Q1 is connected with the pin 2 of a photoelectric coupler U2.
4. The system of claim 2, wherein the analog analysis module comprises a photo coupler U1, a pin 4 of the photo coupler U1 is connected with a power supply +5v, a pin 3 of the photo coupler U1 is connected with one end of a resistor R11, the other end of the resistor R11 is respectively connected with the positive electrode of a ground electrolytic capacitor E1 and the negative electrode of a voltage stabilizing tube SV2, and the positive electrode output signal of the voltage stabilizing tube SV2 is sent to an alarm to drive a red light indication for qualitative early warning.
5. The hydraulic dyke seepage pressure detection early warning system according to claim 2, wherein the double-parameter evaluation module comprises a thyristor VT1, a control electrode of the thyristor VT1 is connected with the positive electrode of a voltage stabilizing tube SV2, a second base electrode of the thyristor VT1 is connected with the other end of a resistor R9, a first base electrode of the thyristor VT1 is connected with an inverting input end of an operational amplifier AR4, a non-inverting input end of the operational amplifier AR4 and a pin 4 of a multiplier D1 are connected with standard value signals, an output end of the operational amplifier AR4 is connected with one end of a resistor R12, the other end of the resistor R12 is respectively connected with one end of a resistor R13 and an inverting input end of an operational amplifier AR5, the other end of the resistor R13 is connected with a pin 3 of a multiplier D1, the non-inverting input end of the operational amplifier AR5 is connected with the ground through a resistor R14, and the other end of the inductor L3 outputs signals to a pressure regulating valve and a three-stage alarm;
The non-inverting input end of the operational amplifier AR6 is connected with the ground, the inverting input end of the operational amplifier AR6 is respectively connected with the other end of a resistor R9, one end of a resistor R15 and one end of a capacitor C2, the output end of the operational amplifier AR6 is respectively connected with the other end of the resistor R15, the other end of the capacitor C2 and one end of a resistor R16, the other end of the resistor R16 is respectively connected with one end of a resistor R18 and the inverting input end of an operational amplifier AR7, the other end of the resistor R18 is connected with a pin 3 of a multiplier D2, the non-inverting input end of the operational amplifier AR7 is connected with the ground through a resistor R17, the output end of the operational amplifier AR7 is respectively connected with a pin 1 of a multiplier D2 and one end of an inductor L4, the other end of the inductor L4 outputs signals to a pressure regulating valve and a three-stage alarm, and the pin 2 of the multiplier D2 is connected with a tolerable change rate signal.
6. The system of claim 5, wherein the 3 times tolerable rate of change signal is obtained by differential calculation of the valve closing response time by differential circuit from the difference between the detected pressure signal and the alarm signal corresponding to the valve closing.
7. The system of claim 1, wherein the deviation of the current measuring point pressure signal from the standard value and the change rate value of the current measuring point pressure signal are adopted, and the pressure regulation of the pressure regulating valve, the repair of the three-level alarm, the valve closing and the dangerous case alarm are adopted, and the system further comprises duration time, false alarm rate and change trend.
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