CN104407223A - Combined resistivity measurement system and method for measuring resistivity by using combined resistivity measurement system - Google Patents
Combined resistivity measurement system and method for measuring resistivity by using combined resistivity measurement system Download PDFInfo
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- CN104407223A CN104407223A CN201410617707.7A CN201410617707A CN104407223A CN 104407223 A CN104407223 A CN 104407223A CN 201410617707 A CN201410617707 A CN 201410617707A CN 104407223 A CN104407223 A CN 104407223A
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Abstract
The invention relates to a combined resistivity measurement system and a method for measuring resistivity by using the combined resistivity measurement system. The combined resistivity measurement system comprises a probe measurement module, a resistance measurement module, a temperature measurement module, a resistivity calculation module and a liquid accommodating tank; the probe measurement module includes four electrode and a temperature sensitive resistor, wherein the outer electrodes are current electrodes, and the inner electrodes are voltage electrodes; the probe measurement module is inserted into the liquid accommodating tank; the resistance measurement module, the probe measurement module and liquid accommodated in the liquid accommodating tank form a closed loop; and the temperature measurement module and the temperature sensitive resistor are connected with each other so as to form a closed loop. The measurement system provided by the invention has multiple functions of temperature measuring, resistance measuring and resistivity calculation. With the measurement system adopted, the size of the resistivity measurement system can be effectively reduced, and the portability of instruments can be improved; and resistivity measurement and temperature measurements are combined together, so that measurement precision can be ensured.
Description
Technical field
The present invention relates to resistivity measurement system technical field, especially Combined resistance rate measuring system and the method by its measured resistivity.
Background technology
Mud resistivity is the important parameter in well logging interpretation, and existing mud resistivity tester is bulky ground test instrument, measures inconvenience, cannot meet the on-the-spot needs that present hole condition becomes increasingly complex.Preliminary work before test is more and wiring requirement is higher, for tester brings heavy burden.Meanwhile, mud high insulating efficiency is poor, and temperature has a significant impact for the measurement result of resistivity, Conventional mud resistivity measurement system can not while detection resistance detected temperatures, therefore the measurement result of resistivity is not accurate enough.Can not fully ensure thermometric precision again for the resistance measuring instrument having temperature measurement function, and measurements resistivity is had a negative impact.
Existing mud resistivity tester adopts body structure, and internal circuit part takies larger space, and needs to take special parking space; Meanwhile, do not possess thermometric function, thus limit the usable range of instrument.
Summary of the invention
For this reason, the invention provides Combined resistance rate measuring system and the method by its measured resistivity, this measuring system has the multi-functional of testing temperature, measuring resistance and calculating resistivity, adopt this measuring system effectively can reduce testing liquid resistivity measuring instrument volume, promote instrument portability, and resistivity measurement is combined with temperature survey, ensure that measuring accuracy, be particularly useful for for accuracy requirement high, and measure among loaded down with trivial details mud resistivity measurement.
The technical scheme that the present invention solves the problems of the technologies described above is as follows:
The invention provides Combined resistance rate measuring system, comprise probe measurement module, resistance measuring module, temperature-measuring module, resistivity computing module and liquid storage can; Described resistance measurement module, temperature-measuring module and resistivity calculate module composition circuit function module; Described circuit function module is connected by connector with described probe module;
Described probe measurement module comprises and arranges four electrodes and thermo-sensitive resistor from top to bottom, wherein first and the 4th electrode form external electrode, dispatch from foreign news agency is galvanic electrode very; Second and the 3rd electrode form in electrode, interior electrode is voltage electrode;
Described resistance measuring module comprises supply module, voltage measurement module, current measurement module and resistance calculations module, resistance measuring module is connected with described probe measurement module, described probe measurement module inserts liquid storage can, four electrodes in liquid-immersed probe measurement module, described liquid storage can is cylindrical, liquid composition closed-loop path in described resistance measuring module, described probe measurement module and described liquid storage can, measures testing liquid resistance and transfers to resistivity computing module;
Described resistivity computing module calculates testing liquid resistivity according to r=RS/l, and wherein, R is resistance measuring module measured value, and S is cylindrical liquid storage can inner circle cross-sectional area, the distance value of l two interior electrodes;
Described temperature-measuring module provides burning voltage and is connected to form closed-loop path with thermo-sensitive resistor, measures testing liquid temperature.
Preferably, described connector is USB interface, HDMI or several conductive contact blades side by side.
Preferably, resistivity computing module can also calculate correction factor k, and calculate correction factor k according to formula r=kR, wherein R is resistance measuring module measured value, and r is resistivity calculated value.
Preferably, the distance of two interior electrodes is 40cm, and the distance of two external electrodes is 60cm, and the distance of the first electrode and the second electrode is 10cm.
Preferably, circular diameter 40cm in cylindrical liquid storage can.
The method of the measured resistivity of Combined resistance rate measuring system, is characterized in that, comprise the following steps:
The supply module of S1, resistance measuring module passes into electric current by galvanic electrode to testing liquid, and obtains the current signal I by galvanic electrode by current measurement module, and I value is transferred to resistance measuring module;
S2, voltage measurement module obtain the voltage differential signal V between two voltage electrodes, and V value is transferred to resistance measuring module;
S3, resistance measuring module are according to formula
testing liquid resistance R between two voltage electrodes can be calculated, and R value is transferred to resistivity computing module;
Be preset with distance l between two voltage electrodes in S4, resistivity computing module and measure the internal diameter r of cylindrical liquid storage can, according to areal calculation formula S=π r
2, calculate cross-sectional area S;
S4, resistivity computing module are according to formula
calculate testing liquid resistivity.
Preferably, the signals collecting time of current measurement module, voltage measurement module and temperature-measuring module is controlled by timing module, gather terminate rear temperature-measuring module by measure thermistor two ends voltage V ' and flow through the electric current I of thermistor ', calculate the resistance R ' of thermistor, then converse temperature corresponding to thermistor resistance by R '.
The invention has the beneficial effects as follows:
The invention provides Combined resistance rate measuring system and the method by its measured resistivity, this measuring system has the multi-functional of testing temperature, measuring resistance and calculating resistivity, resistivity measuring instrument volume can be effectively reduced, promote instrument portability, and resistivity measurement is combined with temperature survey, ensure that measuring accuracy, decrease the workload of surveying work.
Accompanying drawing explanation
Fig. 1 is Combined resistance rate measuring system structural representation.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail.
In the present embodiment, as shown in Figure 1, Combined resistance rate measuring system, comprises probe measurement module, resistance measuring module, temperature-measuring module, resistivity computing module and liquid storage can; Described resistance measurement module, temperature-measuring module and resistivity calculate module composition circuit function module; Described circuit function module is connected by connector with described probe module;
Described probe measurement module comprises and arranges four electrodes and thermo-sensitive resistor from top to bottom, wherein first and the 4th electrode form external electrode, dispatch from foreign news agency is galvanic electrode very; Second and the 3rd electrode form in electrode, interior electrode is voltage electrode;
Described resistance measuring module comprises supply module, voltage measurement module, current measurement module and resistance calculations module, resistance measuring module is connected with described probe measurement module, described probe measurement module inserts liquid storage can, four electrodes in liquid-immersed probe measurement module, described liquid storage can is cylindrical, liquid composition closed-loop path in described resistance measuring module, described probe measurement module and described liquid storage can, measures testing liquid resistance and transfers to resistivity computing module;
Described resistivity computing module calculates testing liquid resistivity according to r=RS/l, and wherein, R is resistance measuring module measured value, and S is cylindrical liquid storage can inner circle cross-sectional area, the distance value of l two interior electrodes;
Described temperature-measuring module provides burning voltage and is connected to form closed-loop path with thermo-sensitive resistor, measures testing liquid temperature.
Preferably, described connector is USB interface, HDMI or several conductive contact blades side by side.
Preferably, resistivity computing module can also calculate correction factor k, and calculate correction factor k according to formula r=kR, wherein R is resistance measuring module measured value, and r is resistivity calculated value.
Preferably, the distance of two interior electrodes is 40cm, and the distance of two external electrodes is 60cm, and the distance of the first electrode and the second electrode is 10cm.
Preferably, circular diameter 40cm in cylindrical liquid storage can.
The method of the measured resistivity of Combined resistance rate measuring system, is characterized in that, comprise the following steps:
The supply module of S1, resistance measuring module passes into electric current by galvanic electrode to testing liquid, and obtains the current signal I by galvanic electrode by current measurement module, and I value is transferred to resistance measuring module;
S2, voltage measurement module obtain the voltage differential signal V between two voltage electrodes, and V value is transferred to resistance measuring module;
S3, resistance measuring module are according to formula
testing liquid resistance R between two voltage electrodes can be calculated, and R value is transferred to resistivity computing module;
Be preset with distance l between two voltage electrodes in S4, resistivity computing module and measure the internal diameter r of cylindrical liquid storage can, according to areal calculation formula S=π r
2, calculate cross-sectional area S;
S4, resistivity computing module are according to formula
calculate testing liquid resistivity.
The signals collecting time of preferred current measurement module, voltage measurement module and temperature-measuring module is controlled by timing module, gather terminate rear temperature-measuring module by measure thermistor two ends voltage V ' and flow through the electric current I of thermistor ', calculate the resistance R ' of thermistor, then converse temperature corresponding to thermistor resistance by R '.
Above disclosedly be only a kind of preferred embodiment of the present invention, certainly can not limit the interest field of the present invention with this, therefore according to the equivalent variations that the claims in the present invention are done, still belong to the scope that the present invention is contained.
Claims (8)
1. Combined resistance rate measuring system, is characterized in that, comprises probe measurement module, resistance measuring module, temperature-measuring module, resistivity computing module and liquid storage can; Described resistance measurement module, temperature-measuring module and resistivity calculate module composition circuit function module; Described circuit function module is connected by connector with described probe module;
Described probe measurement module comprises and arranges four electrodes and thermo-sensitive resistor from top to bottom, wherein first and the 4th electrode form external electrode, dispatch from foreign news agency is galvanic electrode very; Second and the 3rd electrode form in electrode, interior electrode is voltage electrode;
Described resistance measuring module comprises supply module, voltage measurement module, current measurement module and resistance calculations module, resistance measuring module is connected with described probe measurement module, described probe measurement module inserts liquid storage can, four electrodes in liquid-immersed probe measurement module, described liquid storage can is cylindrical, liquid composition closed-loop path in described resistance measuring module, described probe measurement module and described liquid storage can, measures testing liquid resistance and transfers to resistivity computing module;
Described resistivity computing module calculates testing liquid resistivity according to r=RS/l, and wherein, R is resistance measuring module measured value, and S is cylindrical liquid storage can inner circle cross-sectional area, the distance value of l two interior electrodes;
Described temperature-measuring module provides burning voltage and is connected to form closed-loop path with thermo-sensitive resistor, measures testing liquid temperature.
2. Combined resistance rate measuring system according to claim 1, is characterized in that, described connector is USB interface, HDMI or several conductive contact blades side by side.
3. Combined resistance rate measuring system according to claim 1 and 2, it is characterized in that, resistivity computing module can also calculate correction factor k, calculates correction factor k according to formula r=kR, wherein R is resistance measuring module measured value, and r is resistivity calculated value.
4. Combined resistance rate measuring system according to claim 3, it is characterized in that, described system comprises timing module.
5. Combined resistance rate measuring system according to claim 4, is characterized in that, the distance of two interior electrodes is 40cm, and the distance of two external electrodes is 60cm, and the distance of the first electrode and the second electrode is 10cm.
6. according to the Combined resistance rate measuring system described in claim 5, it is characterized in that, circular diameter 40cm in cylindrical liquid storage can.
7., based on a method for the measured resistivity of the Combined resistance rate measuring system described in claim 1, it is characterized in that, comprise the following steps:
The supply module of S1, resistance measuring module passes into electric current by galvanic electrode to testing liquid, and obtains the current signal I by galvanic electrode by current measurement module, and I value is transferred to resistance measuring module;
S2, voltage measurement module obtain the voltage differential signal V between two voltage electrodes, and V value is transferred to resistance measuring module;
S3, resistance measuring module are according to formula
testing liquid resistance R between two voltage electrodes can be calculated, and R value is transferred to resistivity computing module;
Be preset with distance l between two voltage electrodes in S4, resistivity computing module and measure the internal diameter r of cylindrical liquid storage can, according to areal calculation formula S=π r
2, calculate cross-sectional area S;
S5, resistivity computing module are according to formula
calculate testing liquid resistivity.
8. the method for measured resistivity as claimed in claim 7, it is characterized in that, the signals collecting time of current measurement module, voltage measurement module and temperature-measuring module is controlled by timing module, gather terminate rear temperature-measuring module by measure thermistor two ends voltage V ' and flow through the electric current I of thermistor ', calculate the resistance R ' of thermistor, then converse temperature corresponding to thermistor resistance by R '.
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| CN110133056A (en) * | 2019-05-30 | 2019-08-16 | 浙江大学 | A kind of conductivity measurement system of highly conductive liquid |
| CN112051452A (en) * | 2020-07-27 | 2020-12-08 | 山东天岳先进材料科技有限公司 | High-precision graphite crucible resistivity testing device and method |
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| CN107290591A (en) * | 2016-04-04 | 2017-10-24 | 青岛大学 | A kind of resistivity test device of vertical liquid |
| CN110133056A (en) * | 2019-05-30 | 2019-08-16 | 浙江大学 | A kind of conductivity measurement system of highly conductive liquid |
| CN112051452A (en) * | 2020-07-27 | 2020-12-08 | 山东天岳先进材料科技有限公司 | High-precision graphite crucible resistivity testing device and method |
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