CN201716069U - Device for measuring water-level fluctuation automatically - Google Patents

Abstract

The utility model relates to an automatic water-level fluctuation measuring device which comprises a series of pressure measuring pipes, a conductance measuring instrument, a data acquisition system and a computer, wherein PVC pipes the diameter of which are 15 millimeters are adopted as the pressure measuring pipes; each pressure measuring pipe is communicated with a different measuring position; two metal wires are arranged in each pressure measuring pipe at an interval; the curve of relation between the water level and the conductivity value is obtained according to the physical conductive property of medium; and the water level is obtained through calculation according to the conductivity value inside the pressure measuring pipes and the relation between the obtained water level and the conductivity value. The data of conductivity value is measured by a high-precision conductivity meter, is acquired by the data acquisition system automatically and transmitted to the microcomputer, and the fluctuation of water level data is monitored by measuring the change of conductivity value with time, therefore, the automatic water-level fluctuation measuring device can obtain the data of water level conveniently and accurately, and monitors the fluctuation of water level in real time.

Description

A kind of measurement mechanism of automatic measurement SEA LEVEL VARIATION

Technical field

The utility model relates to a kind of measurement mechanism of automatic measurement SEA LEVEL VARIATION, belongs to hydrogeological parameter automatic measuring device field.

Background technology

The height size of water level reaction water body head, in the subject relevant such as groundwater dynamics, fluid mechanics, play an important role with water, the size of static water level and the situation of change of long-time interior water level are the important parameters of research seepage action of ground water, dam seepage safety, pipe stream, therefore, the measurement of water level and monitoring have important significance for theories and practical significance.

In present research and using, the traditional piezometric tube of the general employing of the measurement of water level, a hollow tubular promptly is set in the measuring position, obtain the height of water level by the method that reads liquid level, for the higher place of accuracy requirement, then adopt water pressure sensor to measure water pressure, by the height that concerns the inverse water level of water pressure and water level.For traditional piezometric tube, owing to need manual read's bit data of fetching water, reading error then inevitably occurs, and the frequency of artificial reading is lower, be difficult to realize high-frequency, water level monitoring is measured for a long time; Measure the situation of water level for utilizing water pressure sensor, because cost is higher, and the density of water body to be measured is closely related with the water level value that detects, be difficult to be used widely, and when SEA LEVEL VARIATION, sensor needs the certain reaction time, therefore the data of measuring have certain time delay, can not represent True Data constantly.

Glassware for drinking water has electric conductivity, and the power of water body electric conductivity to be measured can be reacted by the water body electric conductivity value, and the spacing of the size of water body electric conductivity value and exploring electrode is inversely proportional to, and is directly proportional with interelectrode conductive area, that is:

$C\∝\frac{S}{L}---\left(1\right)$

C is that electricity is led in the formula; S is a conductive cross-sectional area; L is a length.

In piezometric tube, if along pipe range two equally spaced tinsels are set, because tinsel has good electrical conductivity, therefore, tinsel is equivalent to two electrodes.Because two tinsel spacings are constant, promptly L is a constant.When in the piezometric tube water being arranged, because the piezometric tube caliber is identical everywhere, the height of conductive area and water level is proportional so, and according to formula (1), electric conductivity value and water level are with linear so.Consider the electrical conductance of piezometric tube material, eliminate the electric conductivity influence of pipe pressure pipe self, piezometric tube should be got the long straight tube of insulativity material, and tinsel also should have resistance to corrosion.Because during SEA LEVEL VARIATION, electric conductivity value will change at once, so electric conductivity value will change constantly with water level, and the phenomenon of delaying time can not occur.

Summary of the invention

The utility model proposes a kind of level measuring and device for monitoring at the deficiencies in the prior art, and it is by being communicated with piezometric tube, so that the water level in the piezometric tube can be represented the water level of measuring position with the measuring position; Two equally spaced tinsels are set in piezometric tube, because water level difference, electric conductivity value difference between two one metal wires, electric conductivity value is linear change basically with the variation of water level, obtain surveying water level in the penstock by the method for measuring electric conductivity value between tinsel, thereby obtain the water level value at place, measuring position.The electric conductivity value that records is gathered by certain time interval by data acquisition system (DAS), realized the continuous monitoring of water level.This device comprises a series of piezometric tube, data acquisition module, data transmission module and computing machine.It is the pvc pipe of 15mm that described piezometric tube adopts caliber, and the data based needs of piezometric tube are determined; Each piezometric tube is connected with different measuring position; Tinsel in the described piezometric tube adopts copper wire, and every copper wire links to each other with the measurement interface that electricity is led data acquisition module in the detection system; Data acquisition module links to each other with data transmission module, and data transmission module links to each other with microcomputer by data line.

According to above technical scheme as can be known, measurement mechanism provided by the utility model has following beneficial effect:

1. easy to use.Can increase or reduce the quantity of piezometric tube as required, install and use easyly, the quantity of piezometric tube what to not influence of measurement result;

2. degree of accuracy height.This device adopts electricity to lead the height of surveying water level with the relation of liquid level, and electricity is led the height of liquid level very responsive, has adopted high-precision conductivity meter, as long as water level has small fluctuation just can reflect in electric conductivity value;

3. survey frequency height.This device adopts data acquisition system (DAS) that the electric conductivity value data are gathered, and can realize continuous, the high frequency collection of data, when SEA LEVEL VARIATION is very fast, can realize the monitoring constantly of water level.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is water level and the electric conductivity value relation curve that utilizes measurement mechanism described in the utility model to obtain;

Fig. 3 utilizes water level that measurement mechanism described in the utility model obtains curve over time.

Embodiment

Below with reference to accompanying drawing, explain the technical solution of the utility model.

As shown in Figure 1, measurement mechanism described in the utility model comprises several piezometric tube, and the piezometric tube bottom is connected with water level to be measured position, two metal copper wires of spaced set in the piezometric tube, and the spacing of two metal copper wires is 15mm; Copper wire links to each other with the multichannel interface that electricity is led data acquisition module in the detection system, and data acquisition module links to each other with data transmission module, and data transmission module links to each other with microcomputer by data line.

As shown in Figure 2, utilize measurement mechanism described in the utility model, the electric conductivity value when having measured different liquid being in different water level in piezometric tube has been set up the relation of electric conductivity value and water level value.Its process is: in piezometric tube, water level is risen successively, water level of every rising is noted electric conductivity value corresponding under this water level, is abscissa axis with the electric conductivity value, is axis of ordinates with the water level value, and the foundation electricity is led the relation with water level.

As shown in Figure 3, utilize measurement mechanism described in the utility model, after the relation of having determined electric conductivity value and water level, measured the process of SEA LEVEL VARIATION.In its process, utilize electricity to lead detection system and measure electric conductivity value in the piezometric tube, utilize data acquisition system (DAS) every the regular hour image data, and with data transmission to the microcomputer stored; The electric conductivity value data that utilization measures, the relation in conjunction with electric conductivity value that obtains and water level calculates water level value, thereby obtains water level and time relation.

Claims (5)

1. measurement mechanism of automatically measuring SEA LEVEL VARIATION, its feature comprises a series of piezometric tube, data acquisition module, data transmission module and microcomputer, each piezometric tube is connected with different measuring position; Spaced set two one metal wires in piezometric tube, copper wire links to each other with the measurement interface that electricity is led data acquisition module in the detection system, and data acquisition module links to each other with data transmission module, and data transmission module links to each other with microcomputer by data line.

2. measurement mechanism according to claim 1 is characterized in that, the quantity of piezometric tube is the quantity of position to be measured.

3. measurement mechanism according to claim 1 is characterized in that, the piezometric tube internal diameter is 15mm.

4. measurement mechanism according to claim 1 is characterized in that, the piezometric tube material is insulation PVC material.

5. measurement mechanism according to claim 1 is characterized in that, piezometric tube copper wire spacing is 15mm.

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