CN201716325U - Groundwater flow velocity flow direction detecting device taking temperature as indicator - Google Patents

Groundwater flow velocity flow direction detecting device taking temperature as indicator Download PDF

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Publication number
CN201716325U
CN201716325U CN2010201058863U CN201020105886U CN201716325U CN 201716325 U CN201716325 U CN 201716325U CN 2010201058863 U CN2010201058863 U CN 2010201058863U CN 201020105886 U CN201020105886 U CN 201020105886U CN 201716325 U CN201716325 U CN 201716325U
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China
Prior art keywords
temperature
groundwater
probe
flow direction
resistance wire
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Expired - Fee Related
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CN2010201058863U
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Chinese (zh)
Inventor
梁越
陈建生
陈亮
王宇铭
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Hohai University HHU
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Hohai University HHU
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Priority to CN2010201058863U priority Critical patent/CN201716325U/en
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Abstract

The utility model relates to a groundwater flow velocity flow direction detecting device taking temperature as an indicator, which comprises a detection probe. A long straight resistance wire with resistance of 20ohms is arranged in the center position of one end of the probe, and the two ends of the resistance wire are connected with a 25V stabilized direct-current source; and 8 high-precision temperature sensors are arranged on the circumference with radius of 2.5cm at an equal interval and are connected with multiple paths of data acquisition systems, and the data acquisition systems are connected with a microcomputer through data transmission lines. The flow direction of the groundwater is judged through analyzing the temperature measured by the sensors at the same point of time; and the flow direction of the groundwater is calculated through analyzing the change curve of the temperature measured by the sensors with time.

Description

A kind of is the groundwater velocity and direction sniffer of tracer agent with the temperature
Technical field
The utility model relates to the sniffer of rock soil mass Groundwater Flow direction and Groundwater Flow speed, belong to hydrogeological parameter sniffer technical field.
Background technology
Now in the technology, groundwater velocity and direction detection method commonly used is the single hole tracer test in the boring, be a kind of based on the theoretical flow rate and direction detection method of single hole dilution, in groundwater velocity and direction detection at present, have a wide range of applications, but in detection process, need probe to be positioned at boring central authorities and could accurately measure the flow velocity and the flow direction, and because probe size has a certain distance with the boring size, the general situation that off-centre in measuring process, all can occur, thus cause measuring distortion; And in order to ensure the accuracy of measurement result, the single hole trace method generally uses radioactive isotope as tracer agent, and radioisotopic use meeting produces harm to the health of environment and testing crew.In existing sniffer, the probe of device is generally bigger, and to place needed module, because the effect of probe, underground water can be interfered because of the existence of probe, therefore makes the result who detects produce error.
Summary of the invention
The utility model is at the deficiencies in the prior art, and proposing a kind of is the groundwater velocity and direction sniffer of tracer agent with the temperature.It makes its heating by applying voltage for the wire thermal source, around thermal source temp probe is set, and the heat that thermal source sends is taken away in phreatic mobile meeting, and therefore, the temp probe in thermal source downstream at first detects variation of temperature, and the temperature value of surveying is also the highest; The temp probe of thermal source upstream detects variation of temperature at last, and the temperature value that detects is also minimum.The temperature that arrives by each probe detection is judged phreatic flow direction and phreatic flow velocity size over time.This device comprises that is surveyed a probe, and it is 20 ohm the straight resistance wire of length that the center of the end of popping one's head in is provided with a resistance, and the resistance wire two ends are connected with 25 volts of constant voltage dc sources; With the resistance wire is the center, and radius is that 2.5 centimetres circumference equal intervals is provided with 8 temperature sensors of high precision around, and temperature sensor links to each other with multi-path data acquiring system by signal wire, and data acquisition system (DAS) links to each other with microcomputer by data line; The frequency acquisition of microcomputer control data and drainage pattern; Utilize the power supply switch of microcomputer controlling resistance silk.Behind electric power starting, every the regular hour, the control multi-path data acquiring system is surveyed the once temperature value of each temperature sensor, simultaneously the temperature data that collects is transferred to microcomputer, and utilizes Control Software to preserve data automatically.
According to above technical scheme, measurement mechanism provided by the utility model as can be known has following beneficial effect:
This device makes the resistance wire heating by the method that applies burning voltage to resistance, can realize the requirement that in the utility model thermal source is produced; Sensor around the resistance wire can detect accurately after thermal source begins heating, and temperature is situation over time; Utilize data acquisition system (DAS) that data are gathered, and utilize microcomputer to realize that data read automatically, transmission and storage automatically automatically.When having saved the labour, guaranteed the degree of accuracy of data acquisition and data analysis, avoided the personal error that is produced in the manually-operated process effectively.The temperature sensor diameter that this device uses is 3mm only, can not make the data that measure more near actual value to the underground water generation disturbance of moving about substantially.
Description of drawings
Fig. 1 is theoretical principle figure of the present utility model;
Fig. 2 is a structural representation of the present utility model;
Fig. 3 is the direction of groundwater flow judgement figure that device described in the utility model obtains;
Fig. 4 is the groundwater velocity judgement figure that device described in the utility model obtains.
Embodiment
Below with reference to accompanying drawing, explain the technical solution of the utility model.
As shown in Figure 1, theoretical principle figure of the present utility model, convection heat transfer' heat-transfer by convection theory according to Groundwater Flow, after the thermal source heating, soil water belt is walked heat, therefore on same circumference, the temperature in thermal source downstream is higher than the temperature in thermal source downstream, can judge phreatic flow direction by the temperature height that each temp probe detects; Because the directivity of Groundwater Flow, on the same circumference, the temperature variation that thermal source downstream temperature probe detection arrives is more Zao than thermal source upstream, and the mistiming of detecting temperature variation is relevant with phreatic flowing velocity, can determine the size of Groundwater Flow speed.
Structural representation of the present utility model as shown in Figure 2, its principle are that a resistance is set is 20 ohm the straight resistance wire of length in the center of probe one end, and the resistance wire two ends are connected with 25 volts of constant voltage dc sources; With the resistance wire is the center, and radius is that 2.5 centimetres circumference equal intervals is provided with 8 temperature sensors of high precision around, and temperature sensor links to each other with multi-path data acquiring system by signal wire, and data acquisition system (DAS) links to each other with microcomputer by data line; Utilize the power supply switch of microcomputer controlling resistance silk.Behind electric power starting, every the regular hour, the control multi-path data acquiring system is surveyed the once temperature value of each temperature sensor, simultaneously the temperature data that collects is transferred to microcomputer, and utilizes Control Software to preserve data automatically.
Fig. 3 is that the direction of groundwater flow that utilization the utility model sniffer obtains is judged schematic diagram.Its course of work is, put opening by microcomputer control power supply, resistance wire begins heating, microcomputer control data acquisition system utilizes 8 temperature sensors to carry out the detection of temperature value simultaneously, after after a while, the temperature value that utilizes synchronization to measure, with the temperature value size is the size of vector, is direction vector with thermal source to the direction of each sensor, obtain 8 temperature vectors, utilize parallelogram rule to superpose vector, promptly obtain phreatic flow direction.
Fig. 4 is that the groundwater velocity that utilization the utility model sniffer obtains is judged schematic diagram.Its course of work is, put opening by microcomputer control power supply, resistance wire begins heating, microcomputer control data acquisition system utilizes 8 temperature sensors to carry out the detection of temperature value simultaneously, the temperature value that each sensor measurement arrives under one section time keeping, obtain each sensor place temperature curve over time, utilization begins the temperature curve that changes at first and the temperature curve that begins to change at last calculated phreatic flowing velocity.

Claims (4)

1. one kind is the groundwater velocity and direction sniffer of tracer agent with the temperature, it is characterized in that: comprise that is surveyed a probe, survey in the probe data acquisition system (DAS) is set, data acquisition system (DAS) links to each other with microcomputer, the frequency acquisition of microcomputer control data and drainage pattern.
2. sniffer according to claim 1 is characterized in that, it is 20 ohm the straight resistance wire of length that the center of surveying probe one end is provided with a resistance, and the resistance wire two ends are connected with 25 volts of constant voltage dc sources.
3. sniffer according to claim 1 is characterized in that, is the center with the resistance wire, and radius is that 2.5 centimetres circumference equal intervals is provided with 8 temperature sensors of high precision around, and temperature sensor links to each other with multi-path data acquiring system by signal wire.
4. sniffer according to claim 1 is characterized in that data acquisition system (DAS) links to each other with microcomputer by data line.
CN2010201058863U 2010-02-01 2010-02-01 Groundwater flow velocity flow direction detecting device taking temperature as indicator Expired - Fee Related CN201716325U (en)

Priority Applications (1)

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CN2010201058863U CN201716325U (en) 2010-02-01 2010-02-01 Groundwater flow velocity flow direction detecting device taking temperature as indicator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010201058863U CN201716325U (en) 2010-02-01 2010-02-01 Groundwater flow velocity flow direction detecting device taking temperature as indicator

Publications (1)

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CN201716325U true CN201716325U (en) 2011-01-19

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105259366A (en) * 2015-10-30 2016-01-20 武汉工程大学 Measuring device and method for seepage flow velocity
CN108981137A (en) * 2011-10-17 2018-12-11 戴维·E·塞兹 Immediately heating water heater
US10208585B2 (en) 2015-08-11 2019-02-19 Intrasen, LLC Groundwater monitoring system and method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108981137A (en) * 2011-10-17 2018-12-11 戴维·E·塞兹 Immediately heating water heater
US10208585B2 (en) 2015-08-11 2019-02-19 Intrasen, LLC Groundwater monitoring system and method
CN105259366A (en) * 2015-10-30 2016-01-20 武汉工程大学 Measuring device and method for seepage flow velocity

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C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20110119

Termination date: 20140201