CN2524243Y - Comparative material moisture inspector - Google Patents

Abstract

The utility model discloses a comparative material moisture inspector. The technical proposal of the utility model is that the meter shell(1) is provided with a meter plate(2) which has an indicator needle(3) and a scale, an indicator lamp(4), an adjusting helix button(5) and a jack hole of a probe(6); the meter plate(2) which has an indicator needle(3) and a scale, the indicator lamp(4), the adjusting helix button(5) and the jack hole of a probe(6) are respectively connected with an electric circuit; and the whole electric circuit consists of three parts as follow: a material moisture inspecting circuit, a voltage regulation circuit and a power and voltage inspecting indicating circuit; the moisture content of the material is converted into a corresponding electric signal by the inspector, and the electric signal is directly displayed through the scale on the meter plate after being processed by the electric circuit. The utility model has the advantages of simple structure, easy operation, solving the problem that the prior inspecting method causes damage and pollutes the grower inside the material in the inspecting process. The utility model relates to an ideal material moisture inspector.

Description

Compare type humidity of materials detector

Affiliated technical field

The utility model relates to a kind of humidity of materials detector, particularly a kind of material to be measured is compared with known moisture content benchmark material sample, thereby knows the comparison type humidity of materials detector of material moisture content value to be measured.

Background technology

In the actual production life, need to know the composite material water content of certain material or multiple material sometimes, the method that adopts is to estimate roughly with hand or naked eyes usually, or uses the standard metering instrument to detect, or uses the oven dry weight method ... or the like.But these methods can not satisfy the actual needs in production, the life fully: such as too big with hand or naked eyes estimation method resultant error, and use the standard metering instrument detecting, though can guarantee very high degree of accuracy, but the detectable inventory of single is very little, and must move on to instrument internal to material and can detect, equipment investment is big, testing staff's technical merit is required high, workload is big, uses also inconvenient.Use the oven dry weight method, adding the water initial stage in batching can use, and is difficult to use in the production cycle process.And this several method all has a significant disadvantages, to wonder a certain position in the bank in enormous quantities or the material moisture at a plurality of positions exactly, must move away from original position to measured object, promptly can't carry out previous status to a certain internal point position material moisture in the former bank detects, and this need be very important under some occasion, as the plantation of rhizoma Gastrodiae and other Mycophyta, or in the special plantation, plant.In addition, material moisture often is not accurately to remain on certain some position in actual production, life, but requires to get final product in some intervals.With the plantation of Chinese crude drug rhizoma Gastrodiae is example, in the growth period that reached 1 year after rhizoma Gastrodiae plantation, require the cultivation sand to remain on different water cut intervals in different seasons, as spring and autumn 56%-65%, summer at 40-50%,, winter is at 50%-40%, can guarantee that like this rhizoma Gastrodiae has the best speed of growth and not sick again evil, this regularly carries out the water cut detection to the cultivation sand with regard to needs, distinguishes situation according to testing result and carries out moisturizing.The water cut of cultivation sand all is to adopt hand to push sand aside basically in the rhizoma Gastrodiae actual production process at present, and with the naked eye with intuitively detecting, its error is very big.In addition in the rhizoma Gastrodiae growth cycle, the mycelia major part that is grown in the halimasch on the wooden stick was tied in spring and seeds of Gastrodia elata, summer then, autumn, winter all can not be destroyed this connection before results, seeds of Gastrodia elata is hard and fast with the location status of supplying the armillaria mycelium of nutriment to its.Because in case change, mycelium and rhizoma Gastrodiae kind get in touch interruption, rhizoma Gastrodiae will stop growing, and is dead even rotten, causes irremediable loss to production.Moreover, because rhizoma Gastrodiae is the inside that is grown in the cultivation sand all the year round, and the outside moisture of cultivation sand steams component velocity apparently higher than inside, inside and outside water cut often has very big difference, and because the downward osmosis of material moisture, the water cut inside and outside, the upper, middle and lower that cause cultivating sand have very big difference, so be to be difficult to know inner water cut by observing the shallow-layer sand only.Because the rhizoma Gastrodiae kind is to cultivate in sand inside, the halimasch of supplying with nutrition to rhizoma Gastrodiae is a kind of fungi, colonizes on the cultivation material wooden stick, very easily is subjected to airborne living contaminants, causes the loss in the production.So, wanting to guarantee that the rhizoma Gastrodiae body grows in the cultivation sand in different water cut intervals in Various Seasonal, will regularly detect cultivation sand interior moisture content, more to guarantee in testing process, not destroy the state of former material as far as possible.Because these special requirements, common hand is pushed aside, the method that detects by an unaided eye, and accurate special-purpose gauging instrument detection method and oven dry weight method or the like detection method just can't have been used in these occasions.And under the situation that large tracts of land is produced, carry out the testing of regular multiple spot position, even use above-mentioned detection method not only to need a lot of times reluctantly, its labor capacity also is very big.

Summary of the invention

The purpose of this utility model is: a kind of original state that can not destroy detected material basically is provided, can make things convenient for the instrument that detects to the inside of material, outside, upper, middle and lower portion etc., and it is quick, simple to operate to have a detection time, be easy to carry, can be spendable everywhere a kind of can the comparing of general production site with the authentic specimen material of known moisture content, thus demonstrate a kind of relatively type humidity of materials detector of the water cut difference of tested material and sample material intuitively.

The technical solution of the utility model is: adopt the single pole of an electrode with two mutually insulateds with certain-length or the detection head of two bars, material moisture is converted to a relative electric signal, and, handle electric signal later and show humidity of materials intuitively by the ammeter gauge outfit with of the electronic circuit processing of this electric signal through forming by three integrated circuit.

The utility model has the advantages that: this detector can change on as far as possible little degree and even not change former material state, under the situation of structure, to material inside, outside, the water cut that upper, middle and lower portion etc. has the material position of certain depth detects, have and detect fast, intuitive display, easy and simple to handle, volume is little, in light weight, can carry, and can manipulate in general production scene, can save time, reduce the strong seat of work, and solved existing detection mode preferably and in testing process, the growth-gen in the material caused and damage and pollution problems.

Description of drawings

Fig. 1 is the utility model detector appearance structure synoptic diagram

Fig. 2 is the utility model circuit diagram

Among the figure: 1 watchcase, 2 dial plates, 3 pointers, 4 pilot lamp, 5 adjustment knobs, 6 detection heads

Embodiment

Below in conjunction with drawings and Examples the utility model is described in further detail.

As shown in Figure 1, the jointing holes of dial plate 2, pilot lamp 4, adjustment knob 5 and the detection head 6 of band pointer 3 and number of division is set on watchcase 1, they are connected with electronic circuit in the watchcase 1 respectively.

Fig. 2 is a circuit diagram of the present utility model, entire circuit is made up of three parts: the capacitor C2 left side is the circuit of material moisture test section among the figure, rightmost ic chip 3 is formed mu balanced circuit with power supply EC pushbutton switch AN, and all the other detect the index circuit for supply voltage.

Mu balanced circuit part principle of work:, after IC3 integrated voltage stabilizer 7806 is handled power supply, export the power supply of 6 volts of stable voltages and give whole detector power supply with obtaining 12 volts of power supply EC after the 8 joint general dry battery series connection.

The reason that voltage detection circuit is set is: for making material moisture testing circuit part operate as normal, must guarantee that at first mu balanced circuit exports 6 volts burning voltage all the time, but at battery with after old, dry cell voltage descends, because IC3 integrated package of pressure-stabilizing input/output terminal voltage difference is minimum must not be lower than 3 volts, could guarantee the IC3 operate as normal, as when being lower than 3 volts, when just EC voltage is lower than 9 volts, just must change dry cell.Supply voltage detects the indicating circuit principle of work: form a series circuit by R13 and diode D1, D2, formed about one 1.1 volts burning voltage at D1, D2 series circuit two ends.Form a series circuit by R11 and R12, power supply EC voltage is carried out dividing potential drop, like this, the voltage drop on R12 changes with the height of dry cell power supply voltage EC.The output voltage and the output voltage of the voltage on the R12 of the voltage follower that D1, D2 series circuit both end voltage form through IC2-2 via the follower of IC2-1 composition, sending into the accurate Schmidt trigger of being made up of IC2-3, R14, R15 and R16 respectively compares, its result is: when the R12 both end voltage is higher than D1, D2 series circuit both end voltage, IC2-3 output-high voltage, voltage follower via the IC2-4 composition, export to the circuit that LED and R17 form, make LED1 luminous, indication dry cell voltage is normal.Extinguish LED2 by high voltage of voltage comparator circuit output that IC1-4 forms this moment.After used for dry cell is old, when dropping to 9 volts, the R12 both end voltage is lower than D1, D2 series circuit both end voltage, the Schmidt circuit output LOW voltage that IC2-3 is formed, at this moment, the IC2-1 follower is output LOW voltage also, thereby LED1 is extinguished, and low-voltage of the voltage comparator that IC1-4 forms output make LED2 luminous, the indication dry cell has been used old, and needing to change battery could operate as normal.

Material moisture testing circuit part principle of work is: be depicted as the detection head that two electrodes of the mutually insulated of a single pole or two bars are formed in the frame of broken lines of Fig. 2 lower left, it is a physical sensors that material moisture is converted to a corresponding voltage value.Its principle of work is: detection head is converted to an equivalent resistance RX1 with material moisture, and how many its resistance sizes is inversely proportional to material moisture.Selected resistance R 3 of RX1 and selector switch KW1 or R4 or R5 are in parallel, obtain an equivalent resistance RX2, this RX2 connects with resistance R 1, R2 and RW1, take out the voltage of R1, R2 interface, the voltage follower of forming via IC1-1 is input to the reverse voltage amplifier of being made up of IC1-2, R6, R7, R8 and KW2 and R9-1～R9-11, relatively amplify, the voltage follower that output voltage is formed via IC1-3 is exported to pointer V1 indication.

The course of work is: when hanging down for material moisture, the RX1 equivalent resistance is higher, RX2 is also higher thereupon, R1, R2 tie point voltage are higher, make the IC1-1 output voltage also higher, after this output voltage is compared with 3 volts of voltages that come out by R7, R8 dividing potential drop and carried out anti-phase amplification, the IC1-2 output voltage is descended, voltage follower IC1-3 output voltage also descends, and pointer indication numerical value also descends.When material moisture was higher, the RX1 equivalent resistance descended, and the RX2 resistance value also descends thereupon, and R1, R2 tie point voltage also descend, and the inverting amplifier output voltage is risen, and the IC1-3 output voltage is followed rising, and the pointer indicated number is risen.This shows,, can demonstrate the height of material moisture by indication numerical value.

The purpose that resistance R 1, R2 are set is: because the equivalent resistance in material moisture from 0 to 100% interval alters a great deal, the corresponding relation of equivalent resistance and water cut is non-linear, be that the equivalent resistance of circuit when surveying the high-moisture material to the low water content material is seriously inconsistent in the scale linearity that is evenly distributed on the gauge outfit, improve this nonlinear relationship for asking, just add R1 and R2.Another effect of R1 and R2 is: the scope interval that the equivalent resistance that material moisture is converted to changes all shows on meter dial as much as possible.The effect of KW1 is to select a suitable parallel resistance, and RX1 is in parallel with the material equivalent resistance, and except that the above-mentioned linear relationship of further improvement, another effect is an intermediate valve position of selecting material measurement range interval better.When surveying the high-moisture material, for example the water cut center is when 50%-90%, and KW1 can be beaten the on position at R3 70% when surveying this kind material in the center.And when being used to measure water cut at 30%-70% (as the rhizoma Gastrodiae plantation etc.) center is 50%, KW1 beats the on position at R4, and is being used to measure water cut when 10%-50% is interval, and the center is 30%, and KW1 beats the on position at R5.Secondly, the raw-material structure difference of material also is a reason selecting KW1.

The multiple spot of KW2 is selected thinking is set: because water source in all parts of the country composition is variant, such as salt content, potential of hydrogen, the difference of plurality of impurities content, cause material reading on detector gauge outfit scale of the identical water cut in different water sources also to have, so just reduced instrument detecting result's accuracy than big-difference.The purpose that KW2 is set is to adapt to the influence to testing result of national different regions, different quality, its effect is to make the gear of selection corresponding with local water quality structure condition, make the enlargement factor of inverting amplifier IC1-2 make corresponding change, widened the region service condition of instrument with the difference of water quality composition.

The effect of RW1 is: when sensor probe is unsettled, regulates RW1 and make gauge outfit establish a fixed point indication at scale, its objective is to make instrument break away from the dead band of gauge outfit indication, enter the linear amplification state.The another one effect is, follows the selected element of KW1 and adapts to the water cut interval of tested material.

The use of present embodiment: when using for the first time, at first want the adjustment instrument, promptly the gear of KW1 is selected in the material moisture interval of detecting according to need earlier.As the rhizoma Gastrodiae plantation, sand water cut intermediate value is about 50%, and the interval is 30%-70%, will be placed on gear 2 to KW1, i.e. the position that is connected with R4.As tested material water cut intermediate value is about 30%, and the interval is 10-50%, will be placed on gear 3 to KW1, i.e. the position that is connected with R5.As tested material water cut intermediate value is about 70, and the interval is 50%-90%, will be placed on gear 1 to gear, promptly is communicated with the position with R3.After choosing the KW1 gear, earlier RW2 is beaten in the centre position, again KW2 is beaten on middle gear 6 earlier, adjust the resistance of RW1 then, make the gauge outfit indication on 10% position of scale (i.e. 1 of 10 volts of gauge outfits volt of position).Prepare the authentic specimen material (as rhizoma Gastrodiae production with 50% water cut authentic specimen) of a known moisture content of identifying out with methods such as standard metering instrument or oven dry weight method or staff dry material water mixing methods then, the instrument detecting head is inserted in this material, observes meter pointer then on which scale.As to be lower than 5 volts of scales of gauge outfit (be 5 volts of positions of gauge outfit, promptly correspond to 50% material moisture), will upwards make a call to one or two gear to KW2, i.e. 7 or 8 gears, this moment is unsettled detection head again, transfer RW1 to make meter pointer 1 volt position (on 10% scale), again detection head is inserted in the 50% known water cut material, refer in 5 scale positions or the approximated position is and mixes up as meter pointer, adjust RW2 again and make pointer just refer to 5 volts of positions, as also far away from 5 volts of positions, will upwards make a call to one or two gear to KW2 again, i.e. 9 or 10 gears, when detection head was in material, meter pointer referred to till near 5 or 5 scales.As a same reason, as be higher than 5 volts of scales of gauge outfit, will make a call to one, two gear to KW2 downwards, i.e. 5 or 4 gears, this moment is unsettled detection head again, transfer RW1 that meter pointer is referred to 1 volt of position again, and then when detection head inserted known 50% water cut in the material, as this moment pointer refer to 5 volts of scale positions or about 5 volts, be and adjust, as still being higher than 5 volts of scales, will make a call to 1 or 2 gear to KW2 downwards is on gear 3 or 2 positions, so again the unsettled accent of detection head RW1, so adjustment refers to till near 5 volts of positions or the 5 volts of scales up to meter pointer.At this moment, adjustment work promptly comes to an end.Just only unsettled detection head before each the use later on, transferring RW1 that meter pointer is referred to 10% is that 1 volt of scale position gets final product, and the KW2 gear no longer changes.Certainly, use the place,, also will do above-mentioned adjustment again because of the water quality difference if change.In addition, when changing material material composition, also to do and readjust.After adjusting end-of-job, when carrying out the detection of large tracts of land multiple spot, only need in the survey materials such as detection head insertion, press the button switch simultaneously, can on gauge outfit, indicate material moisture, refer to be 50% water cut, refer to be 40% water cut at 4 volts at 5 volts of degree, finger is 60% water cut at 6 volts, and the like.Water cut to single check point detects, and can finish in 1 second, has promptly improved work efficiency, has saved the time again, has reduced labour intensity, the more important thing is, does not change the original state of material substantially, can draw the moisture content value of material inside.

Because the utility model is a kind of relatively type detecting instrument, only with standard known moisture content material sample moisture content indicated value near testing result more accurate, and descend gradually in the detection degree of accuracy of sample moisture content value to height two sides.But because in the actual production, real usable range all has a water cut interval, as rhizoma Gastrodiae spring cultivation sand water cut between 45%-65%, in this interval, rhizoma Gastrodiae all can finely be grown, so, though it is the center that the sample moisture content value is arranged, detect the shortcoming that degree of accuracy descends by ripples to water cut height two directions, but still do not influence result of use, and it is fast to have brought detection speed, labour intensity is low, do not destroy the original status architecture of tested material, and have easy and simple to handlely, carry easy, the production scene is available everywhere, and advantage such as instrument cost is lower, a good assistant in a kind of productive life of still can yet be regarded as has solved a difficult problem in the actual production, has very high practical value.

Among the figure: RW1:47K, R1, R2:15K, R6, R7, R8:10K, R4:6,8K, R5:20K, R9-1-R9-10 10K, R10, R12:5.1K, R11:33K, R3, R13, R14, R15:33K, R16:33OK, R17, R18:470 Ω, D1, D2:1N4148, RW2:10K, LED1,2 red and green luminous diode V1:10V voltmeter heads, IC1,2:LM 324 IC3:7806

Claims (2)

1, compares type humidity of materials detector, it is characterized in that: the band pointer (3) and dial plate (2), the pilot lamp (4) of number of division, the jointing holes of alloting knob (5) and detection head (6) are set on watchcase (1), and they are connected with the interior electronic circuit of watchcase (1) respectively.

2, relatively type humidity of materials detector according to claim 1, it is characterized in that: circuit is made up of three parts, the humidity of materials testing circuit, mu balanced circuit that IC3 and power supply EC pushbutton switch AN form and supply voltage detect indicating circuit.

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