CN2075342U - Fast tester for moisture content - Google Patents
Fast tester for moisture content Download PDFInfo
- Publication number
- CN2075342U CN2075342U CN 90212920 CN90212920U CN2075342U CN 2075342 U CN2075342 U CN 2075342U CN 90212920 CN90212920 CN 90212920 CN 90212920 U CN90212920 U CN 90212920U CN 2075342 U CN2075342 U CN 2075342U
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- CN
- China
- Prior art keywords
- moisture content
- content table
- circuit board
- electrode
- inserted link
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The utility model discloses a fast tester for moisture content, adopting rod inserting sampling, linear amplification, and the direct display method of a moisture meter to visually display the moisture content of objects to be measured. The fast tester for moisture content, which is characterized in no loss in sample, no special requirement to environment, easy use, visual display, and reliable performance, is suitable for testing the moisture content of various granular food, various powdery food, oil material, and dairy product.
Description
The utility model belongs to the surveying instrument technical field.Referring in particular to is a kind of quick moisture apparatus of measuring grain, oil plant and dairy products water cut that is mainly used in.
At present, the method for measuring grain, oil plant and dairy products water cut roughly has oven drying method, electric-resistivity method, capacitance method and microwave method several, and the oven drying method power consumption is consuming time; Electric-resistivity method need pulverize sample measurement, and Measuring Time is longer; Microwave method equipment cost height, difficult in maintenance; Capacitance method is fast than the additive method measuring speed, and measuring accuracy is higher, but can only take a sample on the surface, so its range of application also is subjected to certain limitation.
The purpose of this utility model provides a kind of advantage that has various measuring methods concurrently, do not consume sample, environment is not had specific (special) requirements, and the quick moisture apparatus that can measure fast the water cut of deep layer grain, oil plant and dairy products is to improve the ratio of performance to price of existing moisture determination instrument.
The utility model utilizes difform grain, oil plant and dairy products excitation is responded to different frequency signals sensitivity and accuracy, the sampling of employing inserted link, linear amplification, the direct display mode of moisture content table intuitively show the water cut of measured object, have reached the purpose of rapid and accurate determination water cut.
Below in conjunction with accompanying drawing the utility model is described:
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is an electric functional-block diagram of the present utility model;
Fig. 3 is an electrical schematic diagram of the present utility model.
Referring to accompanying drawing 1,2, the utility model is formed by measuring selector switch 1, moisture content table zero potentiometer 2, power switch 3, moisture content table 4, shell 5, circuit board 6, sampling inserted link 8 etc.In the described shell 5 circuit board 6 is housed, is equipped with on the shell face and measures selector switch 1, moisture content table zero potentiometer 2, power switch 3, moisture content table 4; Handle 7 is equipped with in the upper end of sampling inserted link 8, and tube electrode 9,10 is equipped with at bar middle part, and the bottom is designed to taper for ease of inserting and avoiding damaging measured object, and electrode 9,10 is connected with circuit board 6 in the shell 5 by the lead of drawing the pipes in inserted link 8.
Circuit board 6 in the utility model is made of sine wave signal generator 11, prime amplifier 12, emitter follower 13, current amplifier 14, bridge rectifier 15.The output terminal of described sine wave signal generator 11 is connected with emitting electrode A; Be serially connected with prime amplifier 12, emitter follower 13, current amplifier 14, bridge rectifier 15 successively between receiving electrode B and the moisture content table M.
Referring to accompanying drawing 3, principle of work of the present utility model is described below:
According to graininess or powdery grain, oil plant and dairy products institute water content near the most responsive this characteristic of the frequency sine wave signal 220KHZ.Adopt integrated circuit (IC)
1IC
2Deng constituting frequency is the sine wave signal generator of 220KHZ ± 50HZ, and its sine wave output signal is by emitting electrode A emission.The sine wave signal of delivering to receiving electrode B through the measured object transmission passes through by triode BG
1, capacitor C
4, resistance R
10-R
13, potentiometer W
2Deng the prime amplifier that constitutes send into after amplifying for the load capacity that improves preposition amplification be provided with by triode BG
2, resistance R
14The emitter follower that constitutes.The sine wave signal of emitter follower output is through capacitor C
5Coupling is again via triode BG
3, BG
4, resistance R
15-R
18, potentiometer W
3After constituting current amplifier and amplifying again through capacitor C
6Coupling is sent into by diode D
4-D
7, capacitor C
7The bridge rectifier that constitutes is transformed into the dc signal that is directly proportional with the measured object water cut through rectifying and wave-filtering, passes through W again
4Different passages such as Wn are sent among the moisture content table M, directly demonstrate the moisture number percent of tested grain, oil plant and dairy products.
Using method of the present utility model is very simple, at first power switch device is opened, regulate moisture content table zero potentiometer, make the moisture content list index to zero, then, hold the slevis handle inserted link of will taking a sample on demand and insert the measured object certain depth, can see the swing of moisture content list index, when treating that pointer is stable and pointing to a certain scale, just can directly read the moisture number percent of measured object from the moisture content table.
In sum, the utility model is reasonable in design, and is easy to use, measuring speed is fast, measuring accuracy is high, do not damage sample, environment is not had specific (special) requirements, is suitable for the usefulness of various particles or powdery grain, oil plant or its water cut of dairy products fast measuring.
Claims (1)
1, a kind of quick moisture apparatus, it is characterized in that it is by measuring selector switch (1) moisture content table zero potentiometer (2), power switch (3), moisture content table (4), shell (5), circuit board (6), sampling inserted link compositions such as (8), circuit board (6) is housed in the described shell (5), be equipped with on the surface and measure selector switch (1), moisture content table zero potentiometer (2), power switch (3), moisture content table (4), handle (7) is equipped with in the upper end of sampling inserted link (8), tube electrode (9) is equipped with at the bar middle part, (10), the bottom is designed to taper, electrode (9) (10) is connected with circuit board (6) in the shell (5) by the lead of drawing from the interior pipe of inserted link (8), circuit board (6) is by sine-wave generator (11), prime amplifier (12), emitter follower (13), current amplifier (14), bridge rectifier (15) constitutes, the output terminal of described sine wave signal generator (11) is connected with emitting electrode A, is serially connected with prime amplifier (12) successively between receiving electrode B and the moisture content table M, emitter follower (13), current amplifier (14), bridge rectifier (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90212920 CN2075342U (en) | 1990-05-29 | 1990-05-29 | Fast tester for moisture content |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90212920 CN2075342U (en) | 1990-05-29 | 1990-05-29 | Fast tester for moisture content |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2075342U true CN2075342U (en) | 1991-04-17 |
Family
ID=4892432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90212920 Pending CN2075342U (en) | 1990-05-29 | 1990-05-29 | Fast tester for moisture content |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2075342U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105572206A (en) * | 2016-01-20 | 2016-05-11 | 李振奎 | High-precision trace moisture measuring instrument detection circuit |
| CN109030570A (en) * | 2018-06-12 | 2018-12-18 | 中国计量大学 | A kind of Single probe cotton measurement of water ratio electrode |
| CN114167010A (en) * | 2021-09-30 | 2022-03-11 | 河北北方学院 | Potato starch content tester and potato quality management evaluation method |
-
1990
- 1990-05-29 CN CN 90212920 patent/CN2075342U/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105572206A (en) * | 2016-01-20 | 2016-05-11 | 李振奎 | High-precision trace moisture measuring instrument detection circuit |
| CN109030570A (en) * | 2018-06-12 | 2018-12-18 | 中国计量大学 | A kind of Single probe cotton measurement of water ratio electrode |
| CN114167010A (en) * | 2021-09-30 | 2022-03-11 | 河北北方学院 | Potato starch content tester and potato quality management evaluation method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| AD01 | Patent right deemed abandoned | ||
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |