CN101806608A

CN101806608A - Seepage flow and seepage pressure monitoring device

Info

Publication number: CN101806608A
Application number: CN 201010154776
Authority: CN
Inventors: 董增寿; 常春波; 李晓芳; 郭一娜; 高文华; 曾建潮
Original assignee: Taiyuan University of Science and Technology
Current assignee: Taiyuan University of Science and Technology
Priority date: 2010-04-21
Filing date: 2010-04-21
Publication date: 2010-08-18
Anticipated expiration: 2030-04-21
Also published as: CN101806608B

Abstract

The invention provides a seepage flow and seepage pressure monitoring device, which belongs to the technical field of the safety monitoring of the reservoir dam. The invention is characterized in that the upper end of a water level sensor is connected with a control box to form the reservoir dam seepage flow and seepage pressure monitoring device; the water level sensor consists of a twin-core cable which is externally coated with a waterproof dermic layer; the cross section of the twin-core cable is of a infinity shape; the control box consists of a signal acquisition unit, a microprocessor, a wireless communication module, a battery pack and a voltage conversion unit; the signal acquisition unit can convert water level information and environment temperature information into digital information; the microprocessor can correct and calculate the digital information; the wireless communication module can send out water level calculation information; and the voltage conversion unit can carry out boosting conversion on the voltage of the battery pack and carry out real-time monitoring on the electric quantity of the battery pack. During monitoring, the device is arranged in a piezometer tube inserted into the dam body of the reservoir dam to carry out monitoring.

Description

A kind of seepage flow and seepage pressure monitoring device

Technical field

The invention belongs to reservoir dam safety monitoring technology field, be specifically related to a kind of seepage flow and seepage pressure monitoring device of reservoir dam.

Background technology

It is a crucial job that reservoir dam is carried out safety monitoring, and the seepage flow and seepage pressure of dam is one of important indicator of weighing reservoir engineering security of operation degree, generally realizes by the monitoring water level.

At present, the method for monitoring the reservoir dam water level both at home and abroad is a lot, and the float-ball type measuring method is wherein arranged, and it has the mechanical part of frequent activities, is unfavorable for the accurate measurement of water level, and long-time stability are poor; The patent No. be ZL94203512.7 patent disclosure a kind of piezometric level detector, mainly form by mechanical parts such as stepper motors, measuring accuracy and reliability are lower; The water pressure of generally using at present of utilizing is measured the measuring method of water level, and the sensor long period of soaking that must will include electron device is easy to into water, dewfall or makes moist in water, in case intake, sensor will thoroughly lose efficacy; The patent No. be ZL200710067265.3 patent disclosure a kind of method of utilizing distributed optical fiber temperature sensor to measure water level, the method cost is higher, a common reservoir dam needs dozens or even hundreds of piezometric tube, is difficult to promote the popularization use; Adopt the coaxial-type capacitive transducer to measure the method for water level, only be applicable to the measurement of water storage equipment middle water level, be not suitable for the reservoir dam level measuring; The patent No. is that ZL200920051119.6 discloses a kind of reservoir dam wireless type seepage pressure monitoring system, though this system is used for reservoir dam monitoring, its complex structure, cost height.

Summary of the invention

The object of the invention provides a kind of measurement reservoir dam seepage flow and seepage pressure measurement mechanism of new construction, can overcome the shortcoming that prior art exists.

The present invention is achieved in that it comprises the control enclosure that level sensor and a plurality of monitoring modular are formed, its structural attitude is by two parallel cables of arranging side by side, its two ends, outsourcing left and right sides are dome, the upper end that there is a level sensor that the ∞ type waterproof cortex of spill groove constitutes at the middle part with by the signal gathering unit that water level information and ambient temperature information can be converted to numerical information, the microprocessor unit that can revise and calculate numerical information, the radio communication mold module unit that water level computing information can be sent, and battery assembly module and battery voltage can being boosted, and the control enclosure formed of the voltage conversion unit that can monitor battery electric quantity in real time is connected to form and is the reservoir dam seepage flow and seepage pressure monitoring device, this device is installed in the plug in piezometric tube that is embedded in the reservoir dam dam body, can implements monitoring function.

Principle of work of the present invention is: have the level sensor of waterproof cortex that SEA LEVEL VARIATION is converted to capacitance signal, capacitance signal is together sent into microprocessor unit in company with environment temperature after being converted to digital signal through signal gathering unit, microprocessor unit carries out to the capacitance that obtains according to environment temperature that linearity is revised and the water level computing, and revised water level value is delivered to the radio communication mold module unit sends out in real time.

The present invention has following advantage and good effect:

1, simple in structure, the front end digitizing, the result is accurate in metering;

2, with low cost, be beneficial to large-scale promotion;

3, adopt low-power consumption microprocessor and wireless communication module, reduce whole stand-by power consumption;

4, adopt voltage lifting circuit, make full use of battery electric quantity, prolong battery serviceable life, and monitor battery electric quantity in real time, point out the staff to change battery automatically, be convenient to safeguard;

5, add temperature compensation, eliminate the influence of temperature variation measured value;

6, adopt communication, be convenient to on-the-spot installation and maintenance;

7, can be widely used in the measurement of reservoir level and the measurement of dam infiltration osmotic pressure

Description of drawings:

Fig. 1 is for structure of the present invention and implement synoptic diagram;

Fig. 2 is the cable cross-sectional view of level sensor;

Fig. 3 constitutes block diagram for control enclosure of the present invention is inner;

Fig. 4 is a circuit connection diagram of the present invention.

Among the figure: the 1-control enclosure; The 2-level sensor;

The 3-piezometric tube; The 4-reservoir dam;

The water surface in the 5-reservoir; Water level in the 6-piezometric tube;

7,7 '-cable core; 8-waterproof cortex;

9-matrix groove; The 10-signal gathering unit;

The 11-microprocessor; The 12-wireless communication module;

The 13-voltage conversion unit; The 14-electric battery;

The 15-antenna.

Embodiment

As Fig. 1, Fig. 2, shown in Figure 3: by two parallel cables of arranging side by side 7,7 ', its two ends, outsourcing left and right sides are dome, the upper end that there is a level sensor 2 that the ∞ type waterproof cortex 8 of spill groove 9 constitutes at the middle part with by the signal gathering unit 10 that water level information and ambient temperature information can be converted to numerical information, the microprocessor 11 that can revise and calculate numerical information, the wireless communication module 12 that water level computing information can be sent, and battery assembly module 14 and battery voltage can being boosted, and the control enclosure 1 formed of the voltage conversion unit 13 that can monitor battery electric quantity in real time is connected to form and is reservoir dam seepage flow and seepage pressure monitoring device of the present invention, this device is installed in the piezometric tube of inserting in the dam body that is embedded in reservoir dam 43, place the upper end of piezometric tube 3, level sensor 2 to sink to vertically downward in the water in the piezometric tube 3 control enclosure 1 and can carry out monitoring.

Annexation in the control enclosure 1 between each monitoring modular is that the input end of signal gathering unit 10 is connected with level sensor 2 upper ends, and output terminal passes through I ²C or spi bus are connected with the microprocessor 11 with super low-power consumption, the output terminal of microprocessor 11 is connected with the wireless communication module 12 of little power consumption by serial communication interface RS232 or RS485, wireless communication module 12 also is connected with antenna 15, the input end of voltage conversion unit 13 is connected with electric battery 14, output terminal is connected with the power input of signal gathering unit 10, microprocessor 11 and wireless communication module 12 respectively, and the inner concrete annexation of each unit piece is shown in Fig. 2,4:

1) level sensor 2

Level sensor 2 by two parallel heart yearns 7,7 ' and waterproof cortex 8 form, be two core cable, wherein heart yearn 7,7 ' is a galvanized copper wire, waterproof cortex 8 is the waterproof silicon materials, adopt parallel disjunctor mode, the xsect of waterproof cortex 8 is the ∞ type, and there is matrix groove 9 at the middle part.

The upper end of level sensor 2 links to each other with the input end of signal gathering unit 10.

2) signal gathering unit 10

Signal gathering unit 10 is made up of electric capacity conversion chip IC1, adopts low-power consumption, high precision, can change the electric capacity conversion chip AD7745 of capacitance signal and environment temperature simultaneously.

3 pin of one termination capacitor conversion chip IC1 of

level sensor

2,8 pin of another termination capacitor conversion chip IC1,2 pin of electric capacity conversion chip IC1 are connected to the 5V power supply through resistance R 201,14 pin are connected to the 5V power supply, 13 pin ground connection, two capacitor C 1 in parallel and C2 between 13 pin and 14 pin, the data signal transmission end SCL of electric capacity conversion chip IC1 and SDA are connected to the 5V power supply through resistance R 203 and R202 respectively, simultaneously, SCL is connected with 13 pin with 11 pin of microprocessor IC2 respectively with SDA.

3), microprocessor 11

Microprocessor 11 is made up of microprocessor IC2, adopts high speed, low-power consumption microprocessor PIC16F690.Data signal transmission end 11 pin and 13 pin of PIC16F690 pass through I ²The C bus links to each other with 16 pin with 1 pin of IC1 respectively, serial ports 12 pin of PIC16F690 link to each other with 3 pin, 4 pin of wireless communication module 12 respectively with 10 pin, I/O mouth 7 pin of PIC16F690 link to each other with 7 pin, 6 pin of wireless communication module 12 respectively with 8 pin, and the non-shielding of PIC16F690 is interrupted 17 pin and is connected with 3 pin of the chip IC 4 of efficiently boosting.

4), wireless communication module 12

Wireless communication module 12 is made up of the SRWF1208 module.

5), power conversion unit 13

Power conversion unit 13 is made up of the chip L6902D that efficiently boosts.The output terminal of electric battery 14 links to each other with 7 pin of L6902D through inductance L 2, and the voltage output end 8 pin output 5V voltage of L6902D uses for other circuit, and the low-voltage alerting signal LBO of L6902D interrupts 17 pin with the non-shielding of PIC16F690 and links to each other.

Claims

1. seepage flow and seepage pressure measurement mechanism that is used for reservoir dam, comprise level sensor and the control enclosure of forming by a plurality of monitoring modulars, its structural attitude is: by two parallel cables of arranging side by side (7,7 '), its two ends, outsourcing left and right sides are dome, the upper end that there is a level sensor (2) that the ∞ type waterproof cortex (8) of spill groove (9) constitutes at the middle part with water level information can be converted to numerical information, environment temperature can be converted to simultaneously the signal gathering unit (10) of numerical information, the microprocessor (11) that can revise and calculate numerical information, the wireless communication module (12) that water level computing information can be sent, battery voltage can be boosted, and can monitor control enclosure (1) that the voltage conversion unit (13) of battery electric quantity and electric battery (14) constitute in real time and be connected to form and be seepage flow and seepage pressure monitoring device, this device is positioned in the piezometric tube (3) on the reservoir dam (4), control enclosure (1) places the upper end of piezometric tube (3), and level sensor (2) sinks in the interior water of piezometric tube (3) vertically downward can carry out monitoring.

2. a kind of seepage flow and seepage pressure measurement mechanism that is used for reservoir dam according to claim 1, described control enclosure (1) is characterised in that: its annexation is that the input end of signal gathering unit (10) is connected with the upper end of the cable of level sensor (2), and output terminal passes through I ²C or spi bus are connected with microprocessor (11), the output terminal of microprocessor (11) is connected with wireless communication module (12) by serial communication interface RS232 or RS485, wireless communication module (12) also is connected with antenna (15), the output terminal of voltage conversion unit (13) is connected with the power input of signal gathering unit (10), microprocessor (11) and wireless communication module (12) respectively, and the input end of voltage conversion unit (13) is connected with electric battery (14).