CN2060887U - Device for measuring ground water speed and direction - Google Patents
Device for measuring ground water speed and direction Download PDFInfo
- Publication number
- CN2060887U CN2060887U CN 90201289 CN90201289U CN2060887U CN 2060887 U CN2060887 U CN 2060887U CN 90201289 CN90201289 CN 90201289 CN 90201289 U CN90201289 U CN 90201289U CN 2060887 U CN2060887 U CN 2060887U
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- probe
- thermosensitive
- temperature difference
- group
- ground water
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- Expired - Lifetime
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- Indicating Or Recording The Presence, Absence, Or Direction Of Movement (AREA)
Abstract
The utility model relates to a device for measuring the flow speed and the flow direction of ground water, which is mainly composed of a probe and a micro-computer, wherein, the probe is provided with a linear heat source, the same circumference around the linear heat source is uniformly distributed with even number temperature sensitive pieces, wherein, two temperature sensitive pieces on the same diameter are in one group. When ground water flows across the probe, a temperature difference exists in the temperature sensitive pieces of each group, wherein, the temperature difference of the temperature sensitive pieces of the group accords with the water flow direction is maximum, the a signal of the temperature difference is changed into an electrical signal through a transmitter and is sent to the computer to be analyzed and operated, namely the flow speed of the ground water can be drawn.
Description
The utility model relates to a kind of device of measuring flow rate of liquid, the flow direction, specifically a kind of device of measuring groundwater velocity, the flow direction.
The method of measuring groundwater velocity at present has indicator connection test method.Promptly respectively bore a hole, then indicator is dropped into the underground water from one of them hole, write down the time that indicator arrives again in another hole in two places.This method is not only time-consuming, and measurement result is also inaccurate, because underground water is not all to be along the streamlined flow between two holes.Institute for Atomic Research, academy of agricultural sciences, Nanjing has worked out the tagging velocimetry, but because isotopicly obtain, transport, problems such as keeping and pollution, the application of this method is very restricted.
Task of the present utility model provides a kind of device that can measure groundwater velocity, the flow direction, and this device especially can be measured the low phreatic flow velocity of flow velocity and the flow direction.
The solution that realizes the utility model task is: the groundwater flow that is provided, flow speed and direction measurement mechanism have a microcomputer that descends the probe of water insertedly and the detection signal of this probe is carried out calculation process.Above-mentioned probe has the wire thermal source of a vertical permanent power, be evenly equipped with the even number thermosensitive part on week in the same garden that with the wire thermal source is the axle center, two thermosensitive parts on the wherein same diameter are one group, each is organized thermosensitive part and joins by switch and temperature difference transmitter, and the output terminal and the microcomputer of temperature difference transmitter join.
Beasurement base of the present utility model is that the thermal field skew is theoretical.According to this theory: if a thermal source is set in water, when flow rate of water flow hour, but its flow velocity U approximate expression is:
λ is the constant by the decision of the factors such as distance between power of heat source, medium heat conduction coefficient, thermosensitive part and thermal source in U=λ (T1-T2) formula; T1, T2 are respectively the temperature of two thermosensitive parts.Therefore, as long as record the flow velocity that the temperature difference of two thermosensitive parts can calculate current.And the temperature difference of two thermosensitive parts can convert electric signal to by transmitter, so by testing the corresponding relation that can set up between flow rate of water flow and two thermosensitive part temperature signals, with this computing foundation as computing machine.
The measuring process of this device is: will pop one's head in and put into underground water from the vertical core that is bored, the wire thermal source will transmit heat around it.When underground current through when probe, can carry heat to the motion of current downstream because two thermosensitive parts are symmetry with the wire thermal source in each group, so certainly exist a temperature difference between the two, wherein the line between two thermosensitive parts of one group of temperature difference maximum is water (flow) direction.Flow velocity is big more, and the temperature difference is big more between two thermosensitive parts.Each is organized thermosensitive part and joins by switch and temperature difference transmitter successively, its temperature signal is converted to electric signal delivers to computing machine analyze computing after amplifying, and draws phreatic flow velocity.
When underground water level was higher, the available rigidity extension bar of the probe of this device was sent into underground water from ground through measured hole.Respectively organizing the orientation of thermosensitive part on the probe this moment can be determined by the mark on the rigidity extension bar; When underground water level was low, the available cable of popping one's head in hangs to be delivered in the underground water.At this moment, on the surface level in the probe cylindrical shell two orthogonal magnetosensitive parts are installed, in order to measure the concrete orientation of thermosensitive part.
Below in conjunction with accompanying drawing content of the present utility model is illustrated.
Fig. 1 is the structure diagram of the utility model probe.
Fig. 2 is that the A of Fig. 1 is to view.
Fig. 3 is the working position figure of probe.
As shown in Figure 1 and Figure 2: probe (1) has a cylindrical shell (2), and a wire thermal source (3) is equipped with in the central authorities of cylindrical shell (2), and it is made up of stainless-steel pipe (4) and heating wire (5).Around it, be provided with eight stainless-steel tubes (6) that equidistantly distribute on week in same garden, be provided with thermosensitive part (7) in it, eight thermosensitive parts be numbered 1,2,3(sees Fig. 2), be one group wherein, as to number 4,5 be one group corresponding to two thermosensitive parts on the same diameter.Two thermosensitive parts in each group are received on two brachium pontis of temperature difference transmitter measuring bridge by switch.When underground current through probe when (1), the temperature of two thermosensitive parts in each group is different.Wherein the temperature difference with the one group thermosensitive part consistent with water (flow) direction is a maximum, and this temperature signal changes voltage signal into by measuring bridge to be delivered to microcomputer and carry out calculation process, can draw the groundwater velocity of measurement point.In order to determine respectively to organize the orientation of thermosensitive part, in probe cylindrical shell (2), be provided with two magnetosensitive parts (8), (9), it is actually two horizontal positioned and orthogonal geomagnetic field measuring coil, they are corresponding with the position of two groups of thermosensitive parts respectively, can determine angle between thermosensitive part and terrestrial magnetic field by this coil, thereby determine respectively to organize the orientation of thermosensitive part.Probe (1) is delivered in the underground water with cable and (is seen figure three) during measurement.In order to prevent that wire thermal source and thermosensitive part from being broken hanging to send in the process, a guard shield (10) is housed in the termination of the steel pipe (8) of the steel pipe (4) of wire thermal source and device thermosensitive part.
The utility model has the advantages that simple in structure, easy to operate, save time, expensive few, polluted underground water not. Another advantage of the present utility model is to measure extremely low flow velocity.
Claims (3)
1, a kind of groundwater velocity, direction measuring device, it is characterized in that having a microcomputer that can insert phreatic probe (1) in the boring and the detection signal of probe (1) be carried out calculation process, said probe (1) has a vertical permanent power wire thermal source (3), be evenly equipped with even number thermosensitive part (7) on week in the same garden that with wire thermal source (3) is the axle center, two thermosensitive parts on the wherein same diameter are one group, each thermosensitive part joins by switch and temperature difference transmitter, and the output terminal and the microcomputer of temperature difference transmitter join.
2, measurement mechanism as claimed in claim 1 is characterized in that on a surface level of probe (1) two orthogonal magnetosensitive parts (8,9) being housed.
3, measurement mechanism as claimed in claim 1 or 2 is characterized in that said thermosensitive part (7) has eight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90201289 CN2060887U (en) | 1990-02-04 | 1990-02-04 | Device for measuring ground water speed and direction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90201289 CN2060887U (en) | 1990-02-04 | 1990-02-04 | Device for measuring ground water speed and direction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2060887U true CN2060887U (en) | 1990-08-22 |
Family
ID=4882940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90201289 Expired - Lifetime CN2060887U (en) | 1990-02-04 | 1990-02-04 | Device for measuring ground water speed and direction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2060887U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101782591A (en) * | 2010-02-01 | 2010-07-21 | 河海大学 | Groundwater flow speed and flow direction detection method and device using temperature as tracer |
| CN102507094A (en) * | 2011-10-19 | 2012-06-20 | 河海大学 | Measuring device and method for measuring flowing of high-pressure water body |
| CN103376138A (en) * | 2013-06-27 | 2013-10-30 | 刘敏 | Vertical flow measurement device and current meter in underground water monitoring well and detection method |
| CN105223379A (en) * | 2015-09-29 | 2016-01-06 | 武汉工程大学 | A kind of ground seepage monitoring sensor and preparation method |
-
1990
- 1990-02-04 CN CN 90201289 patent/CN2060887U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101782591A (en) * | 2010-02-01 | 2010-07-21 | 河海大学 | Groundwater flow speed and flow direction detection method and device using temperature as tracer |
| CN101782591B (en) * | 2010-02-01 | 2014-03-26 | 河海大学 | Groundwater flow speed and flow direction detection method and device using temperature as tracer |
| CN102507094A (en) * | 2011-10-19 | 2012-06-20 | 河海大学 | Measuring device and method for measuring flowing of high-pressure water body |
| CN102507094B (en) * | 2011-10-19 | 2013-10-30 | 河海大学 | Measuring device and method for measuring flowing of high-pressure water body |
| CN103376138A (en) * | 2013-06-27 | 2013-10-30 | 刘敏 | Vertical flow measurement device and current meter in underground water monitoring well and detection method |
| CN103376138B (en) * | 2013-06-27 | 2016-03-02 | 刘敏 | Vertical current amount determining device and current meter thereof and detection method in groundwater monitoring well |
| CN105223379A (en) * | 2015-09-29 | 2016-01-06 | 武汉工程大学 | A kind of ground seepage monitoring sensor and preparation method |
| CN105223379B (en) * | 2015-09-29 | 2018-06-08 | 武汉工程大学 | A kind of ground seepage monitoring sensor and preparation method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |