CN207866320U - A kind of measuring device of pinpoint accuracy - Google Patents

Abstract

The utility model discloses a kind of measuring devices of pinpoint accuracy, it is characterized in that, including at least cylinder (1), the cylinder (1) includes pedestal (12) and the barrel (11) of clear hollow, one end of the barrel is fixedly connected with the goblet for constituting one end open with the pedestal, the outer surface of the barrel is in axial direction equipped with one group of mother's scale (21) and N groups subscale mark (22), multiple scales for being used for indicating volume are uniformly arranged in every group of scale, the subscale mark (22) is equal with female minimum scale of scale (21), the minimum scale of female scale (21) can be divided into (N+1) equal portions by subscale mark, specific implementation is that the relatively female scale (21) of subscale mark (22) moves in the axial direction【A/ (N+1) * minimum scales】Distance.Compared with prior art, the utility model has the characteristics of measuring accuracy is high, and production cost is low, and work efficiency is high.

Description

A kind of measuring device of pinpoint accuracy

Technical field

The utility model is related to a kind of measuring devices of pinpoint accuracy, and in particular to a kind of high-precision liquid volume or not The measuring device of regular solid volume.

Background technology

Currently, the volume for measuring liquid mostly directly uses the tools such as graduated cylinder, measuring cup, measuring bottle to measure, their accuracy is relatively low, Object under test is mainly directly placed into water by the volume for measuring irregular solid, is measured using drainage, is generally used water Make measurement liquid, but some special samples are needed with special measurement liquid, and the body of some samples for being unable to contact liq Product, which measures, then has problem.For the measurement method of existing solid volume, when being related to measuring great amount of samples, one is surveyed due to every A sample all can accordingly take a part out of and measure liquid, so will add a part again at regular intervals measures liquid, and survey Quantity of fluid may because of the impurity carried on sample either sample itself substance dissolving enter measure liquid and become cloudy or Measuring liquid, topmost adrift a large amount of bubbles, very influence are read；The irregular solid that some are easily melted into water then needs Special measurement liquid carries out cubing, these liquid prices are more expensive than water, may be toxic, measures cost higher；More or one Then there is problem in the measurement of a little irregular solid volumes for being unable to contact liq.

Although occurring some measuring devices at present, its is complicated, operating difficulties, and some of measuring devices need Water is poured out just to the sample to be tested that can take back completely, working efficiency is low, and measuring accuracy is relatively low, and error in reading is larger, some Measuring device measures relatively large solid irregular solid volume more difficult.

Therefore, a kind of measuring device of pinpoint accuracy, and in particular to a kind of high-precision liquid volume or irregular solid The measuring device of volume is suggested.

Invention content

The purpose of this utility model is to provide a kind of measuring device of pinpoint accuracy, which has measuring accuracy height, The characteristics of production cost is low, and work efficiency is high.

To achieve the above object, the utility model provides technical solution below：

A kind of measuring device of pinpoint accuracy, which is characterized in that include at least cylinder (1), the cylinder (1) includes pedestal (12) and the barrel of clear hollow (11), one end of the barrel (11) are fixedly connected with composition one end open with the pedestal (12) Goblet, the outer surface of the barrel (11) is in axial direction equipped with one group of mother's scale (21) and N groups subscale mark (22), every group Multiple scales for being used for indicating volume, the minimum scale phase of the subscale mark (22) and female scale (21) is uniformly arranged in scale The minimum scale of female scale (21) can be divided into (N+1) equal portions Deng, subscale mark, specific implementation is subscale mark (22) phase Female scale (21) is moved in the axial direction【A/ (N+1) * minimum scales】Distance, wherein the A indicates that A groups are sub Scale (22), N indicate total subscale mark group number.

When reading, the scale mark of the subscale mark (22) and female scale (21) is inconsistent, directly on subscale mark (22) Practical scale is indicated to be used to read,

Alternatively, the subscale mark (22) does not indicate scale value, the scale value of female scale (21) is only indicated, in cylinder body bottom mark Note value：A/ (N+1) * minimum scales, when liquid level is just parallel with some scale of A groups subscale mark (22) when measuring, then The actual volume of testing liquid is A/ (N+1) * minimum scales+V_{It is female}, wherein V_{It is female}Indicate certain of the A group subscale mark parallel with liquid level The value of the one scale female scale of number first down.

Further, the group number N of the subscale mark (22) is preferably 3~12, and particular number is according to the bore of required cylinder It determines, size i.e. its bore and height that the cylinder needs can be adjusted according to different applications, but answer basic guarantee The bore of cylinder and the ratio of height are less than 1/5；

Further, the cylinder (1) is equipped with protective device, and the protective device includes support ring (3) and protective jacket (4),

The concrete structure of the protective device is：The outer wall on barrel (11) top is equipped with the support ring (3) of sheet, The pedestal (12) is equipped with protective jacket (4), the support ring (3) and protective jacket (4) at least one be polygon and support The size of ring (3) is less than the size of protective jacket (4), and the distance of cylinder (1) center line to support ring (3) any side is more than support ring (3) distance of cylinder (1) mouth is arrived.

Further, the support ring (3) and protective jacket (4) preferably select rubber material；

In actual use：The support ring (3) can play certain buffering when cylinder (1) is accidentally overturned and make With preventing cylinder (1) from being knocked and split, be crushed, the protective jacket (4) can improve friction coefficient and a degree of can also protect Pedestal (12) and the shaking for reducing pedestal (12) injustice caused by during some are produced due to cylinder (1) pedestal (12), to reduce Systematic error improves accuracy, and additionally, due to support ring (3) and protective jacket (4), at least one is polygon and support ring (3) Size be less than protective jacket (4) size, it is possible to cylinder (1) is toppled over and is stably placed in the planes such as desktop, and And there are one inclined angles to be conducive to the exclusion of internal liquid, reduction cylinder (1) for cylinder (1) itself when being positioned over plane Air-dry time；

As an improvement, the measuring device further includes water-tight device (5), picks and places sampling device (7) and fixing device (6),

The water-tight device (5) is the software cylindrical body of one end open, and the other end is in hemispherical, and the opening is equipped with Annulus protrusion (51), and the bore of the water-tight device (5) be less than cylinder (1) internal diameter, make its be put into cylinder (1) it is interior when and barrel (11) there is certain gap in inside, and the length of the water-tight device (5) is more than the cylinder height of cylinder (1), in normal use Hemispherical end thereof contacts cylinder (1) bottom of water-tight device (5), and spherical surface has when touching cylinder (1) in part It falls into；

It is described to pick and place sampling device (7) mainly including bag body (71), lead room (72) and rope hauling device (73), the bag body (71) it is there are one the reticulate body being open, the open end of the bag body (71) is equipped with rope hauling device (73), and opposite with being open one End is equipped with lead room (72)；

The fixing device (6) includes the annulus (61) that at least two can be mutually nested, and the annulus being relatively large in diameter (61) it can just be nested in barrel (11) inside, the outside of the annulus (61) is equipped at least two stabilizer blade (62), the stabilizer blade (62) picking and placeing for annulus (61) is facilitated nesting with；

Further, the rope hauling device (73) includes a drawstring A (731), 3 drawstring B (732) and 1 drawstring C (733), the opening in bag body (71), one end of the drawstring B (732) and drawstring is arranged by latch closure in the drawstring A (731) A (731) is hinged, and the other end is connect with one end of drawstring C (733), and the other end of the drawstring C (733) is equipped with draw ring (734), convenient for picking and placeing picking and placeing for sampling device (7)；

In actual use：A certain amount of water is first added in cylinder (1), an annulus (61) is then nested in cylinder (1) opening takes software water-tight device (5) to be put into cylinder (1), then another annulus (61) is taken to be nested in above-mentioned annulus (61) in, the annulus on water-tight device (5) raised (51) is made just to be stuck between two annulus, water-tight device (5) are fixed, it puts Enter to pick and place sampling device (7) and ensure that drawstring has one of ring outside, ensures that drawstring is that relaxation state i.e. software water-tight device (5) is complete Complete accepted picks and places sampling device (7), and guarantee picks and places the bottom that sampling device (7) sinks to software water-tight device (5), and software wader The bottom for setting (5) is contacted with cylinder (1) well, and software water-tight device (5) and the sampling device (7) that picks and places of inside are pressed at this time It suppresses, only there are the shape of lead room (72) interior lead, the good scale value V at this time of record₁, it then takes out and picks and places sampling device (7), from Opening is packed into sample to be tested, and above-mentioned sample to be tested is irregular solid, tenses drawstring as possible and then puts it into waterproof In device (5) and ensure that the relaxation state i.e. software water-tight device (5) of drawstring has been accepted completely and pick and place sampling device (7), ensures to take Laying out apparatus (7) sinks to the bottom of software water-tight device (5), and the bottom of software water-tight device (5) connects with cylinder 1 well It touches, the good scale value V at this time of record₂, finally calculate difference V twice₂-V₁, the as volume of sample to be tested；

Further, the water-tight device (5) is preferably rubber material；

Further, the fixing device (6) is preferably with rigidity plastics material or metal；

Further, the bag body (71) is worked out preferably with silk material；

Further, the cylinder (1) can be one kind in graduated cylinder, measuring cup or measuring bottle；

As an improvement, the zero graduation line of mother's scale (21) is located at the middle and lower part of cylinder, preferably middle part, apart from cylinder (1) a certain distance is arranged at bottom, and size, bore and the height that cylinder needs can adjust still Ying Ji according to different applications The bore of this guarantee cylinder and the ratio of height are less than 1/5；

Zeroing and its measurement：First toward being added a part of water in cylinder (1), with a certain distance from the guarantee water surface has from zero graduation line； It by fixing device (6), water-tight device (5) and picks and places sampling device (7) and installs successively according to the method described above, observe cylinder (1) interior liquid Face height simultaneously estimates the required water that returns to zero, if apart from zero graduation line farther out if with a hand gently lift fixing device (6) and Each accessory, adds a part of water inside using other containers, then gently installs fixing device (6) and each accessory and observes Reading, then using dropper and gently to raise the oral area of software water-tight device (5) interior along software water-tight device (5) and barrel (11) The gap of side adds water to return to zero；It need to be returned to zero three times, i.e., will pick and place sampling device (7) according to the state of normal use from software It is pulled out in water-tight device (5), places into, then return to zero, repeat three times；Sample is put into the mesh bag for picking and placeing sampling device (7), State before holding, which is put into, picks and places sampling device (7), at this time water-tight device (5) and inside pick and place sampling device (7) due to hydraulic pressure Effect be flattened, and the reading on barrel (11) is the volume of irregular solid to be measured, the post-tensioning that first sample has measured Go out to pick and place sampling device (7), unclamp mesh bag mouth and take out sample, need not generally return to zero again when changing next sample, if measuring big It can return to zero in due course according still further to aforesaid way when measuring sample.

Compared with prior art, the utility model has the characteristics that：

1, a kind of cylinder of pinpoint accuracy is provided, the processing technology of the cylinder is simple, and whens reading numerical values is convenient and efficient and accurate Exactness is high, its accuracy improves several times even more than ten times for existing survey tool, can be not only used for measuring The volume of liquid can also carry out the measurement of some irregular solid volumes under the auxiliary of other tools；

2, contact liq is unable to for some or needs that with special measurement liquid the irregular of cubing could be carried out Solid, the utility model avoid being in direct contact for liquid and solid, and it is tap water to measure liquid, and it is convenient to measure, section About cost；

3, not lossy due to measuring liquid when solid takes out in measurement process, so only needing once to return to zero can be completed It only needs to carry out single reading when repeatedly measuring work, and measure every time, working efficiency significantly improves.

Description of the drawings

Fig. 1 is the structural schematic diagram of the utility model middle cylinder body；

Fig. 2 is the expanded schematic diagram of barrel in Fig. 1；

Fig. 3 is the structural schematic diagram of the utility model embodiment 2；

Fig. 4 is the close-up schematic view of A structures in Fig. 3；

Fig. 5 is the structural schematic diagram for picking and placeing sampling device；

Fig. 6 is the structural schematic diagram of fixing device.

As shown in the figure：1 is cylinder, and 11 be barrel, and 12 be pedestal, and 2 be scale value, and 21 be female scale, and 22 be subscale mark, 3 It is support ring, 4 be protective jacket, and 5 be water-tight device, and 51 be annulus protrusion, and 6 be fixing device, and 61 be annulus, and 62 be stabilizer blade, and 7 are Sampling device is picked and placeed, 71 be a bag body, and 72 be lead room, and 73 be rope hauling device, and 731 be drawstring A, and 732 be drawstring B, and 733 be drawstring C, 734 be draw ring.

Specific implementation mode

The following detailed description of preferred embodiments of the present invention.

Embodiment 1：Referring to Fig.1~2, it is the structural schematic diagram of the utility model embodiment 1, including cylinder 1, the cylinder 1 includes the barrel 11 of pedestal 12 and clear hollow, and one end of the barrel 11 is fixedly connected with composition one end with the pedestal 12 and opens The outer surface of the goblet of mouth, the barrel 11 is in axial direction equipped with one group of mother's scale 21 and N groups subscale mark 22, every group of scale Multiple scales for being used for indicating volume are uniformly set, and the subscale mark 22 is equal with the minimum scale of female scale 21, subscale mark The minimum scale of female scale 21 can be divided into (N+1) equal portions, specific implementation is that the mother's scale 21 relatively of subscale mark 22 exists It is moved on axial direction【A/ (N+1) * minimum scales】Distance, wherein the A indicates that A groups subscale mark 22, N indicate always 22 groups of numbers of subscale mark.

The cylinder 1 can be one kind in graduated cylinder, measuring cup or measuring bottle；

Above-mentioned apparatus increases subscale mark system to make measurement simultaneously for measuring liquid volume in same cylinder 1 Accuracy is substantially improved, and the distance between adjacent scale of subscale mark 22 used herein is consistent with female scale 21, can be with Very easily it is conducive to observer to read, and does not need to carry out original equipment and technique in the production process of cylinder 1 Larger change rather than the existing similar micrometer caliper used or uses magnifying glass to amplify especially small scale The state for being easier to distinguish to human eye, both devices require higher, more cumbersome using process in production, and measurement accuracy is not It must can ensure；In addition, under normal circumstances, it is desirable to realize more accurate measure the common approach is that inside existing scale value Increase smaller scale, make scale value more crypto set, but increases excessively to may result in and be read since resolution of eye is insufficient Wrong situation occurs, and wastes time significantly, increases the difficulty of production, improves production cost, therefore, in the application The especially small scale that should be put in the same scale is separated to be allowed to become around barrel 11 and has uniform scale Multiple scale values 2,

It is faster and more accurately read in use in order to facilitate the user of the graduated cylinder, it is proposed that two sets of subscale marks 22 The mask method and number reading method of numerical value：

When reading, the subscale mark 22 and the scale mark of female scale 21 are inconsistent, are directly indicated on subscale mark 22 Practical scale is for reading, to directly read；

Alternatively, the subscale mark 22 does not indicate scale value, the scale value of female scale 21 is only indicated, is marked in cylinder body bottom Value：A/ (N+1) * minimum scales, it is when liquid level is just parallel with some scale of A groups subscale mark 22 when measuring, then to be measured The volume of liquid is A/ (N+1) * minimum scales+V_{It is female}, wherein V_{It is female}Indicate that a certain scale of the A group subscale mark parallel with liquid level is past The value of the female scale of lower number first.

Further, the group number N of the subscale mark 22 is preferably 3~12, and particular number is determined according to the bore of required cylinder Fixed, the bore and height that cylinder needs can be adjusted according to different applications, in this way relative to original graduated cylinder, measuring cup or For measuring bottle, accuracy correspondingly can be increased to several times to more than ten times by measuring device described herein；

Further, the cylinder 1 is equipped with protective device, and the protective device includes support ring 3 and protective jacket 4,

The concrete structure of the protective device is：The outer wall on 11 top of the barrel is equipped with the support ring 3 of sheet, described Pedestal 12 is equipped with protective jacket 4, at least one is polygon for the support ring 3 and protective jacket 4, and 1 center line of cylinder is to propping up The distance of 3 any side of pushing out ring is more than the distance that support ring 3 arrives 1 mouthful of cylinder, ensures 1 mouthful of cylinder and table when cylinder 1 being enable to topple over There is a certain distance in face；

Further, the support ring 3 and protective jacket 4 preferably select rubber material；

In actual use：The support ring 3 can play certain cushioning effect when cylinder 1 is accidentally overturned, and prevent Only cylinder 1, which is knocked, splits, is crushed, and the protective jacket 4 can improve friction coefficient can also a degree of 12 He of protection pedestal The uneven shaking of pedestal 12 caused by during some are produced due to 1 pedestal 12 of cylinder is reduced, to reduce systematic error, is improved accurate Degree, is same polygon additionally, due to support ring 3 and protective jacket 4, and the polygon is triangle, quadrangle, pentagon Either one kind in hexagon or the support ring 3 are polygon, and the pedestal of the protective jacket 4 is circle, then described Support ring 3 is circle, and the pedestal of the protective jacket 4 is polygon, and the size of support ring 3 is less than the size of protective jacket 4, so There are one tilt for cylinder 1 itself when can topple over cylinder 1 and be stably placed in the planes such as desktop, and be positioned over plane Angle to be conducive to the exclusion of internal liquid, reduce the air-dry time of cylinder 1.

Embodiment 2：It is the structural schematic diagram of the utility model embodiment 2, compared with Example 1, this reality with reference to Fig. 3~6 Apply example difference lies in：The measuring device further includes water-tight device 5, picks and places sampling device 7 and fixing device 6,

The water-tight device 5 is the software cylindrical body of one end open, selects flexibility very strong and fluid-tight rubber material It is made, gets over Bao Yuehao under the premise of ensureing that the water-tight device 5 has certain intensity, the other end, can in hemispherical So that the pressure of water can be utilized thoroughly to shrivel it when putting it into cylinder 1, the opening is equipped with annulus protrusion 51, and the bore of the water-tight device 5 is less than 1 internal diameter of cylinder, has certain seam with 11 inside of barrel when it being made to be put into cylinder 1 Gap, the length of the water-tight device 5 are slightly larger than the height of barrel 11, a hemispherical termination for water-tight device 5 in normal use 1 bottom of cylinder is touched, and spherical surface has part invagination when touching cylinder 1；

Described to pick and place sampling device 7 mainly include bag body 71, lead room 72 and rope hauling device 73, there are one the bag body 71 is The reticulate body of opening, the reticulate body are woven by the silk material with certain stretching resistance, and the bag body 71 is straight The lower part bore that diameter should be slightly less than the water-tight device 5 is removed and placed into facilitating, and the open end of the bag body 71, which is equipped with, draws Rope device 73, opposite one end is equipped with lead room 72 with being open, and lead is housed in the lead room 72, the effect of the lead is Overcome the buoyancy for picking and placeing sampling device 7 and water-tight device 5 and the buoyancy for overcoming some samples that can sink to 1 bottom of cylinder；

The fixing device 6 includes the annulus 61 that at least two can be mutually nested, and the annulus 61 being relatively large in diameter is rigid It can be nested in inside barrel 11 well, the outside of the annulus 61 is equipped with 3 stabilizer blades 62, and the stabilizer blade 62 facilitates nesting with taking for ring It puts, the fixing device 6 is made of the smooth rigidity plastics material in surface or metal；

Further, the rope hauling device 73 includes a drawstring A731,3 drawstring B732 and 1 drawstring C733, described Drawstring A731 encompasses a circle by latch closure in the opening of bag body 71, one end of 3 drawstring B732 with drawstring A731 Hinged, the other end is connect with one end of drawstring C733, and the other end of the drawstring C733 is equipped with draw ring 734, conveniently picks and places sample Device 7 picks and places, and the retractility of the rope hauling device 73 is relatively low, better softness, there is certain intensity, can bear it is to be measured It is thin as possible under the premise of the weight of solid, the lead of bag body 71 and lower part and lead room 72, and the rope hauling device 73 One end, that is, draw ring 734 to the bag body 71 distance from bottom outline be higher than cylinder 1 height；

In actual use：A certain amount of water is first added in cylinder 1, an annulus 61 is then nested in opening for cylinder 1 At mouthful, takes software water-tight device 5 to be put into cylinder 1, then another annulus 61 is taken to be nested in above-mentioned annulus 61, make water-tight device Annulus protrusion 51 on 5 is just stuck between two annulus, and water-tight device 5 is fixed, and is put into and is picked and placeed sampling device 7 and ensure that drawstring has One of ring outside, ensures that drawstring is that relaxation state i.e. software water-tight device 5 has been accepted pick and place sampling device 7 completely, ensures to take Laying out apparatus 7 sinks to the bottom of software water-tight device 5, and the bottom of software water-tight device 5 is contacted with cylinder 1 well, at this time Software water-tight device 5 and the internal sampling device 7 that picks and places are suppressed by pressure, and only there are the shape of lead in lead room 72, record is good at this time Scale value V₁, then take out and pick and place sampling device 7, be packed into sample to be tested from opening, above-mentioned sample to be tested is irregular solid Solid tenses drawstring and then puts it into water-tight device 5 and ensure that the relaxation state i.e. software water-tight device 5 of drawstring is complete as possible Complete accepted picks and places sampling device 7, and guarantee picks and places the bottom that sampling device 7 sinks to software water-tight device 5, and software water-tight device 5 Bottom is contacted with cylinder 1 well, the good scale value V at this time of record₂, finally calculate difference V twice₂-V₁, as wait for test sample The volume of product.

Embodiment 3：With reference to Fig. 3, compared with embodiment 1 or embodiment 2, difference in this case is that, mother's scale 21 zero graduation line is located at the middle part of barrel 11, has a certain distance apart from 1 bottom of cylinder, answers cylinder 1 described in basic guarantee Bore and the ratio of height are less than 1/5；

In actual use, it needs first to return to zero, then measure：A part of water is first added into cylinder 1, ensures the water surface With a certain distance from having from zero graduation line；By fixing device 6, water-tight device 5 and pick and place sampling device 7 according to the method in embodiment 2 according to Secondary installation is observed in cylinder 1 and liquid level and estimates the required water that returns to zero, if apart from zero graduation line farther out if it is light with a hand Gently lift fixing device 6 and each accessory, adds a part of water inside using other containers, then gently install fixing device 6 And each accessory and observed reading, then the oral area of software water-tight device 5 is raised using dropper and gently along software water-tight device 5 Water is added to return to zero with the gap of 11 inside of barrel；It need to be returned to zero three times, i.e., will pick and place shape of the sampling device 7 according to normal use State is pulled out out of software water-tight device 5, is placed into, then is returned to zero, and is repeated three times；Sample is put into and picks and places sampling device 7 Mesh bag, the state before keeping, which is put into, picks and places sampling device 7, and water-tight device 5 and internal pick and place sampling device 7 due to hydraulic pressure at this time Effect is flattened, and the reading on barrel 11 is the volume of irregular solid to be measured, and first sample is pulled out after having measured and taken Laying out apparatus 7 unclamps mesh bag mouth and takes out sample, need not generally return to zero again when changing next sample, if measuring a large amount of samples When can return to zero in due course according still further to aforesaid way.

Above-described is only preferred embodiments of the present invention, it is noted that for the ordinary skill of this field For personnel, without departing from the concept of the present invention, several changes and improvements can also be made, these all belong to In the scope of protection of the utility model.

Claims (6)

1. a kind of measuring device of pinpoint accuracy, which is characterized in that include at least cylinder (1), the cylinder (1) includes pedestal (12) and the barrel of clear hollow (11), one end of the barrel (11) are fixedly connected with composition one end open with the pedestal (12) Goblet, the outer surface of the barrel (11) is in axial direction equipped with one group of mother's scale (21) and N groups subscale mark (22), every group Multiple scales for being used for indicating volume, the minimum scale phase of the subscale mark (22) and female scale (21) is uniformly arranged in scale The minimum scale of female scale (21) can be divided into (N+1) equal portions Deng, subscale mark (22), i.e. subscale mark (22) is relatively female Scale (21) moves in the axial direction【A/ (N+1) * minimum scales】Distance, wherein the A indicates A group subscale marks (22), N indicates total subscale mark (22) group number.

2. the measuring device of pinpoint accuracy according to claim 1, which is characterized in that the group number N of the subscale mark (22) It is 3~12.

3. the measuring device of pinpoint accuracy according to claim 2, which is characterized in that the cylinder (1) is equipped with protection and fills It sets, the protective device includes support ring (3) and protective jacket (4),

The concrete structure of the protective device is：The outer wall on barrel (11) top is equipped with the support ring (3) of sheet, described Pedestal (12) is equipped with protective jacket (4), the support ring (3) and protective jacket (4) at least one be polygon and support ring (3) Size be less than the size of protective jacket (4), the distance of cylinder (1) center line to support ring (3) any side is more than support ring (3) distance of cylinder (1) mouth is arrived.

4. according to the measuring device of claims 1 to 3 any one of them pinpoint accuracy, which is characterized in that mother's scale (21) zero graduation line is located at the middle and lower part of cylinder, and the bore of the cylinder (1) and the ratio of height are less than 1/5.

5. according to the measuring device of claims 1 to 3 any one of them pinpoint accuracy, which is characterized in that the measuring device Further include water-tight device (5), pick and place sampling device (7) and fixing device (6),

The water-tight device (5) is the software cylindrical body of one end open, and the other end is in hemispherical, and the opening is equipped with annulus Raised (51), and the bore of the water-tight device (5) is less than cylinder (1) internal diameter, the length of the water-tight device (5) is more than cylinder (1) cylinder height；

Described to pick and place sampling device (7) mainly including bag body (71), lead room (72) and rope hauling device (73), the bag body (71) is There are one the reticulate body being open, the open end of the bag body (71) is equipped with rope hauling device (73), and opposite one end is equipped with being open Lead room (72), the rope hauling device (73) include at least one drawstring A (731), 3 drawstring B (732) and 1 drawstring C (733), in the opening of bag body (71), one end and the drawstring A (731) of the drawstring B (732) are cut with scissors for drawstring A (731) setting It connects, the other end is connect with one end of drawstring C (733), and the other end of drawstring C is free end, the freedom of the drawstring C (733) End is equipped with draw ring (734)；

The fixing device (6) includes the annulus (61) that at least two can be mutually nested, and the annulus (61) being relatively large in diameter It can just be nested in cylinder (1) inside, the outer upper of the annulus (61) is equipped at least two stabilizer blade (62).

6. the measuring device of pinpoint accuracy according to claim 4, which is characterized in that the measuring device further includes waterproof Device (5) picks and places sampling device (7) and fixing device (6),

The water-tight device (5) is the software cylindrical body of one end open, and the other end is in hemispherical, and the opening is equipped with annulus Raised (51), and the bore of the water-tight device (5) is less than cylinder (1) internal diameter, the length of the water-tight device (5) is more than cylinder (1) cylinder height；

Described to pick and place sampling device (7) mainly including bag body (71), lead room (72) and rope hauling device (73), the bag body (71) is There are one the reticulate body being open, the open end of the bag body (71) is equipped with rope hauling device (73), and opposite one end is equipped with being open Lead room (72), the rope hauling device (73) include at least one drawstring A (731), 3 drawstring B (732) and 1 drawstring C (733), in the opening of bag body (71), one end and the drawstring A (731) of the drawstring B (732) are cut with scissors for drawstring A (731) setting It connects, the other end is connect with one end of drawstring C (733), and the other end of drawstring C is free end, the freedom of the drawstring C (733) End is equipped with draw ring (734)；

The fixing device (6) includes the annulus (61) that at least two can be mutually nested, and annulus (61) energy that the diameter is big It is enough nested in cylinder (1) inside, the outside of the annulus (61) is equipped at least two stabilizer blade (62).