CN205607913U - Water content measuring device - Google Patents
Water content measuring device Download PDFInfo
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- CN205607913U CN205607913U CN201620467883.1U CN201620467883U CN205607913U CN 205607913 U CN205607913 U CN 205607913U CN 201620467883 U CN201620467883 U CN 201620467883U CN 205607913 U CN205607913 U CN 205607913U
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- pid controller
- heating plate
- water content
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- insulation heating
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Abstract
The utility model discloses a water content measuring device, including consecutive water content accuracy of measurement, interface circuit, embedded controller and PWM drive circuit, still receive and storage module including the mutual instrument of resistance voltage conversion circuit, intelligence and the high in the clouds that all link to each other with embedded controller, PWM drive circuit and resistance voltage conversion circuit all link to each other with water content accuracy of measurement, and mutual instrument of intelligence and high in the clouds are received and are linked to each other with storage module. Water content measuring device's measuring sensitivity is high, the precision is high, moreover wherein good, the easy realization of thermostatic control structure symmetry.
Description
Technical field
This utility model relates to a kind of water content measurement apparatus, belongs to the technical field of Control system architecture.
Background technology
In liquid or solid, the measurement of water content is agriculture and industrial have a wide range of applications.In grain depot, the storage of grain needs the moment to detect water content therein in order to avoid the mouldy germination of grain, the storage of edible oil is also required to moment detection water content therein in order to avoid edible oil goes bad, in industry, the storage of petroleum product, chemical agent etc. needs also exist for moment detection water content.
The most domestic water content measuring method mode is the most relatively backward, does not also have systematization, successional measurement apparatus and measuring method mode.Generally, baking or baking weight method are usually taken in grain depot, i.e. take a small amount of sample, the weight of before and after twice is obtained to calculate water content therein drying to weigh before and after moisture, as for liquid type such as edible oil, then weighing by the way of being positioned in container baking and obtain twice weight difference of before and after, these ways and means degree of accuracy are low and can only measure by unitary sampling, it is impossible to realize measuring continuously.And in large-scale experiment room, although the certainty of measurement of water content is the highest, but often measuring instrument is bulky, usually sitting formula instrument, and its realize be also unitary sampling measure.
Diplobiont is substantially had to amass small and exquisite handheld water content measurement instrument on market, it can only measure various different corn, one class is digital display inserted-link type Moisture Meter, the measurement antenna that its only one of which is elongated, utilizing and measure antenna and launch sine wave signal and gather the sine wave signal being reflected back simultaneously and compare the mode of attenuation and record water content, this metering system precision is low, poor sensitivity；Its principle another kind of is to measure the size of water content by the way of measuring resistance, and it contains two measures metal antenna, measures metal antenna by two and insert in measured corn, by measuring the water content value that the resistance between two antennas obtains in corn during measurement.Although the water content measuring instrument device of this hand-held is the most convenient, but liquid can not be measured, more especially there is the liquid of certain electric conductivity, cause because its resistance is the least measurement zone indexing the least, and this water content measuring instrument device is also merely able to unitary sampling and measures.During for the most uninterruptedly measuring some samples needing long term storage or monitoring the sample of some high risks, it is clear that this hand-held meter device is the most inapplicable.
To sum up, use said method mode measure water content have the most portable, can not continuous sampling can only unitary sampling, degree of accuracy be the highest, measure the shortcoming that sensitivity is low, measurement scope is the widest.
Utility model content
Main purpose of the present utility model is, overcomes deficiency of the prior art, it is provided that the water content measurement apparatus of a kind of new structure, can improve degree of accuracy and sensitivity that water content is measured, it is achieved the continuous sampling of facilitation.
In order to achieve the above object, this utility model be the technical scheme is that
A kind of water content measurement apparatus, including the water content measuring probe, interface circuit, embedded controller and the PWM drive circuit that are sequentially connected, also include that the resistive voltage change-over circuit, intelligent interaction instrument and the high in the clouds that are all connected with embedded controller receive and memory module, described PWM drive circuit is all connected with water content measuring probe with resistive voltage change-over circuit, and described intelligent interaction instrument receives with high in the clouds and is connected with memory module.
Wherein, described embedded controller includes data receiver port, PWM generator, serial ports sending module, Analog-digital Converter module and pid control module, the data that described data receiver port sends for receiving interface circuit, described Analog-digital Converter module is for receiving the data of resistive voltage change-over circuit, and after changing, send pid control module to, described pid control module sends PWM generator to for receiving after Analog-digital Converter module transmits next data and processes, described PWM generator is used for producing corresponding PWM ripple and acting on PWM drive circuit, described serial ports sending module is used for sending data to intelligent interaction instrument and high in the clouds receives and memory module.
And, described pid control module includes one-level PID controller and two grades of PID controller, and described one-level PID controller includes that the first PID controller and the second PID controller, described two grades of PID controller include the 3rd PID controller and intelligence complementary filter；The input of described first PID controller and the input of the second PID controller are connected with Analog-digital Converter module, the outfan of described first PID controller and the outfan of the second PID controller are all connected by the input of intelligence complementary filter and the 3rd PID controller, and the outfan of the outfan of described first PID controller, the outfan of the second PID controller and the 3rd PID controller is all connected with PWM generator.
This utility model is further arranged to: described water content measuring probe includes capacitance measurement probe, high-k epoxy resin layer and the constant temp controlling structure arranged the most from top to bottom；Described capacitance measurement probe is connected with data receiver port by interface circuit.
Wherein, described constant temp controlling structure includes insulate heating plate and temperature transducer, described insulation heating plate includes the first insulation heating plate, the second insulation heating plate and the 3rd insulation heating plate, and described temperature transducer includes the first temperature transducer and the second temperature transducer；Described first temperature transducer is between the first insulation heating plate and the second insulation heating plate, described second temperature transducer is between the second insulation heating plate and the 3rd insulation heating plate, described first insulation heating plate, second insulation heating plate and the 3rd insulation heating plate are drawn by heating plate wire and are controlled, described first temperature transducer passes sequentially through resistive voltage change-over circuit and is connected with the input of Analog-digital Converter module with the first PID controller, described second temperature transducer passes sequentially through resistive voltage change-over circuit and is connected with the input of Analog-digital Converter module with the second PID controller；
And, the outfan of described first PID controller passes sequentially through PWM generator and is connected with the first insulation heating plate with PWM drive circuit, the outfan of described second PID controller passes sequentially through PWM generator and is connected with the 3rd insulation heating plate with PWM drive circuit, and the outfan of described 3rd PID controller passes sequentially through PWM generator and is connected with the second insulation heating plate with PWM drive circuit.
This utility model is further arranged to: described serial ports sending module is connected with intelligent interaction instrument by RS485 modular converter, is connected with memory module with high in the clouds reception by WIFI module.
This utility model is further arranged to: described water content measuring probe also includes insulating paint, described capacitance measurement probe is that both positive and negative polarity is to shape comb, shape comb is attached on high-k epoxy resin layer by described both positive and negative polarity, and is immersed in insulating paint, is fixed on by insulating paint on high-k epoxy resin layer；Described both positive and negative polarity includes anelectrode, negative electrode, several paired positive pole comb and negative pole comb to shape comb, and described positive pole comb is parallel to anelectrode, and described negative pole comb is parallel to negative electrode, described positive pole comb and negative pole comb intersect plane arrange；Described anelectrode, negative electrode, positive pole comb and negative pole comb all use the printing in PCB technology to cover copper.
This utility model is further arranged to: described high-k epoxy resin layer uses FR-4 material.
This utility model is further arranged to: described positive pole comb and negative pole comb are 15 comb, and the size of each comb is a length of 10mm, a width of 0.3mm, and the interval of adjacent fingers is 0.6mm.
This utility model is further arranged to: described positive pole comb and negative pole comb are the most arranged in a crossed manner, the interleaving depth of positive pole comb and negative pole comb is 9.7mm, positive pole comb is 0.15mm away from the distance negative electrode edge, one end of anelectrode, and negative pole comb is 0.15mm away from the distance anelectrode edge, one end of negative electrode.
Compared with prior art, this utility model has the beneficial effect that
The measurement of a kind of water content measurement apparatus that this utility model provides is highly sensitive, and certainty of measurement is high；And in water content measurement apparatus, constant temp controlling structure symmetry is good, easily realizes.Be embodied in, capacitance measurement probe use high-density large-area based on PCB technology cover copper probe, measure scope is wide, precision is high, highly sensitive；Constant temp controlling structure uses the refracting films of insulation heating plate-temperature sensor-insulation heating plate-temperature sensor-insulation heating plate, and it is more flexible and convenient that multi-point temp sampling and many sections heated at constant temperature make system control, and runs more steady.
Foregoing is only the general introduction of technical solutions of the utility model, and in order to be better understood upon technological means of the present utility model, the utility model will be further described below in conjunction with the accompanying drawings.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of water content measurement apparatus of the present utility model；
Fig. 2 is the connection diagram of pid control module in a kind of water content measurement apparatus of the present utility model；
Fig. 3 be in a kind of water content measurement apparatus of the present utility model water content measuring probe face structural representation；
Fig. 4 is the plan structure schematic diagram of water content measuring probe in a kind of water content measurement apparatus of the present utility model；
Fig. 5 is the plan structure schematic diagram of constant temp controlling structure in a kind of water content measurement apparatus of the present utility model.
Detailed description of the invention
Below in conjunction with Figure of description, this utility model is further described.
As shown in Figure 1, a kind of water content measurement apparatus, including the water content measuring probe, interface circuit, embedded controller and the PWM drive circuit that are sequentially connected, also include that the resistive voltage change-over circuit, intelligent interaction instrument and the high in the clouds that are all connected with embedded controller receive and memory module, described PWM drive circuit is all connected with water content measuring probe with resistive voltage change-over circuit, and described intelligent interaction instrument receives with high in the clouds and is connected with memory module.
Described embedded controller includes data receiver port, PWM generator, serial ports sending module, Analog-digital Converter module and pid control module, the data that described data receiver port sends for receiving interface circuit, described Analog-digital Converter module is for receiving the data of resistive voltage change-over circuit, and after changing, send pid control module to, described pid control module sends PWM generator to for receiving after Analog-digital Converter module transmits next data and processes, described PWM generator is used for producing corresponding PWM ripple and acting on PWM drive circuit, described serial ports sending module is used for sending data to intelligent interaction instrument and high in the clouds receives and memory module.
As shown in Figure 2, described pid control module includes one-level PID controller and two grades of PID controller, described one-level PID controller includes the first PID controller (PID controller 1) and the second PID controller (PID controller 2), and described two grades of PID controller include the 3rd PID controller (PID controller 3) and intelligence complementary filter；The input of described first PID controller (PID controller 1) and the input of the second PID controller (PID controller 2) are connected with Analog-digital Converter module, the outfan of described first PID controller (PID controller 1) and the outfan of the second PID controller (PID controller 2) are all connected by the input of intelligence complementary filter and the 3rd PID controller (PID controller 3), the outfan of described first PID controller (PID controller 1), the outfan of the second PID controller (PID controller 2) and the outfan of the 3rd PID controller (PID controller 3) are all connected with PWM generator.
As shown in Figure 3 and Figure 4, described water content measuring probe includes capacitance measurement probe 4, high-k epoxy resin layer 1 and the constant temp controlling structure 2 arranged the most from top to bottom；Described capacitance measurement probe 4 is connected with data receiver port by interface circuit.
Described water content measuring probe also includes insulating paint 3, described capacitance measurement probe 4 is that both positive and negative polarity is to shape comb, shape comb is attached on high-k epoxy resin layer 1 by described both positive and negative polarity, and is immersed in insulating paint 3, is fixed on high-k epoxy resin layer 1 by insulating paint 3；Described both positive and negative polarity includes anelectrode C, negative electrode D, several paired positive pole comb A and negative pole comb B to shape comb 4, described positive pole comb A is parallel to anelectrode C, described negative pole comb B be parallel to negative electrode D, described positive pole comb A and negative pole comb B intersect plane arrange；Described anelectrode C, negative electrode D, positive pole comb A and negative pole comb B all use the printing in PCB technology to cover copper.
Described high-k epoxy resin layer 1 is middle level, uses FR-4 material to make, and thickness is 1.6mm ± 0.05mm.
Described positive pole comb A and negative pole comb B is 15 comb, and the size of each comb is a length of 10mm, a width of 0.3mm, and the interval of adjacent fingers is 0.6mm.15 positive pole a length of 10mm of comb A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, A13, A14, A15, a width of 0.3mm, it is spaced apart 0.6mm, same, 15 the negative poles a length of 10mm of comb B1, B2, B3, B4, B5, B6, B7, B8, B9, B10, B11, B12, B13, B14, B15, a width of 0.3mm, be spaced apart 0.6mm, 15 positive pole comb are parallel to anelectrode C, and 15 negative pole comb are parallel to negative electrode D.
Described positive pole comb and negative pole comb are the most arranged in a crossed manner, the interleaving depth of positive pole comb and negative pole comb is 9.7mm, positive pole comb is 0.15mm away from the distance negative electrode edge, one end of anelectrode, and negative pole comb is 0.15mm away from the distance anelectrode edge, one end of negative electrode.
nullPositive pole comb A1 and negative pole comb B1 is spaced apart 0.15mm，Same，B1 and A2，A2 and B2，B2 and A3，A3 and B3，B3 and A4，A4 and B4，B4 and A5，A5 and B5，B5 and A6，A6 and B6，B6 and A7，A7 and B7，B7 and A8，A8 and B8，B8 and A9，A9 and B9，B9 and A10，A10 and B10，B10 and A11，A11 and B11，B11 and A12，A12 and B12，B12 and A13，A13 and B13，B13 and A14，A14 and B14，B14 and A14，A14 and B14，Have 29 to positive and negative comb electric capacity，Interval is all 0.15mm，It is all the most equidistant between positive and negative comb and positive and negative electrode.
As shown in Figure 5, described constant temp controlling structure 2 includes insulate heating plate 5 and temperature transducer 6, described insulation heating plate 5 includes the first insulation heating plate E, the second insulation heating plate F and the 3rd insulation heating plate G, and described temperature transducer 6 includes the first temperature transducer H and the second temperature transducer I；Described first temperature transducer H is between the first insulation heating plate E and the second insulation heating plate F, described second temperature transducer I is between the second insulation heating plate F and the 3rd insulation heating plate G, and described first insulation heating plate E, the second insulation heating plate F and the 3rd insulation heating plate G are drawn by heating plate wire 7 and control.
As depicted in figs. 1 and 2, described first temperature transducer H(temperature sensor 1) pass sequentially through resistive voltage change-over circuit and be connected with the input of Analog-digital Converter module with the first PID controller, described second temperature transducer (temperature sensor 2) passes sequentially through resistive voltage change-over circuit and is connected with the input of Analog-digital Converter module with the second PID controller；The outfan of described first PID controller (PID controller 1) passes sequentially through PWM generator and is connected with the first insulation heating plate (insulation heating plate 1) with PWM drive circuit, the outfan of described second PID controller (PID controller 2) passes sequentially through PWM generator and is connected with the 3rd insulation heating plate (insulation heating plate 3) with PWM drive circuit, and the outfan of described 3rd PID controller (PID controller 3) passes sequentially through PWM generator and is connected with the second insulation heating plate (insulation heating plate 2) with PWM drive circuit.
Described serial ports sending module is connected with intelligent interaction instrument by RS485 modular converter, is connected with memory module with high in the clouds reception by WIFI module.
Sampled by the multi-point temp of the first temperature transducer and the second temperature transducer, using intelligence complementary filter is core, single-stage double-loop control is carried out for the first insulation heating plate and the 3rd insulation heating plate, second insulation heating plate is then used to the control mode of the multi-ring input of twin-stage in addition complementary filter, to strengthen core space temperature stability to the full extent, avoid the occurrence of temperature fluctuation so that system controls more flexible and convenient, runs more steady.
And three pieces of independent insulation heating plates are distributed in bottom probe the ambient temperature providing constant of measuring that can be to pop one's head in, and when probe is exposed in air, temperature can be promoted to accelerate the measured liquid that evaporation detecting head surface is infected with due to last time measurement, keep being dried of probe, so can also improve and measure efficiency and reduce probe by the risk of liquid corrosion.Owing to the high-sensitivity detection surface capacitance area of probe is bigger, during contamination liquid, surface temperature is uneven, so constant temp controlling structure uses three pieces of independent insulation heating plates, every piece of insulation heating plate can independently control, two other temperature sensor is positioned between insulation heating plate and can ensure that the lip temperature of insulation heating plate reaches steady state value, use the laminated construction of insulation heating plate-temperature sensor-insulation heating plate-temperature sensor-insulation heating plate, ensure the temperature stability of core space.
The above, it it is only preferred embodiment of the present utility model, not this utility model is made any pro forma restriction, although this utility model is disclosed above with preferred embodiment, but it is not limited to this utility model, any those skilled in the art, in the range of without departing from technical solutions of the utility model, when the technology contents of available the disclosure above makes a little change or is modified to the Equivalent embodiments of equivalent variations, in every case it is the content without departing from technical solutions of the utility model, any simple modification above example made according to technical spirit of the present utility model, equivalent variations and modification, all still fall within the range of technical solutions of the utility model.
Claims (7)
1. a water content measurement apparatus, it is characterized in that: include water content measuring probe, interface circuit, embedded controller and the PWM drive circuit being sequentially connected, also include that the resistive voltage change-over circuit, intelligent interaction instrument and the high in the clouds that are all connected with embedded controller receive and memory module, described PWM drive circuit is all connected with water content measuring probe with resistive voltage change-over circuit, and described intelligent interaction instrument receives with high in the clouds and is connected with memory module；
Described embedded controller includes data receiver port, PWM generator, serial ports sending module, Analog-digital Converter module and pid control module, the data that described data receiver port sends for receiving interface circuit, described Analog-digital Converter module is for receiving the data of resistive voltage change-over circuit, and after changing, send pid control module to, described pid control module sends PWM generator to for receiving after Analog-digital Converter module transmits next data and processes, described PWM generator is used for producing corresponding PWM ripple and acting on PWM drive circuit, described serial ports sending module is used for sending data to intelligent interaction instrument and high in the clouds receives and memory module；
Described pid control module includes one-level PID controller and two grades of PID controller, and described one-level PID controller includes that the first PID controller and the second PID controller, described two grades of PID controller include the 3rd PID controller and intelligence complementary filter；The input of described first PID controller and the input of the second PID controller are connected with Analog-digital Converter module, the outfan of described first PID controller and the outfan of the second PID controller are all connected by the input of intelligence complementary filter and the 3rd PID controller, and the outfan of the outfan of described first PID controller, the outfan of the second PID controller and the 3rd PID controller is all connected with PWM generator.
A kind of water content measurement apparatus the most according to claim 1, it is characterised in that: described water content measuring probe includes capacitance measurement probe, high-k epoxy resin layer and the constant temp controlling structure arranged the most from top to bottom；
Described capacitance measurement probe is connected with data receiver port by interface circuit；
Described constant temp controlling structure includes insulate heating plate and temperature transducer, and described insulation heating plate includes the first insulation heating plate, the second insulation heating plate and the 3rd insulation heating plate, and described temperature transducer includes the first temperature transducer and the second temperature transducer；Described first temperature transducer is between the first insulation heating plate and the second insulation heating plate, described second temperature transducer is between the second insulation heating plate and the 3rd insulation heating plate, described first insulation heating plate, second insulation heating plate and the 3rd insulation heating plate are drawn by heating plate wire and are controlled, described first temperature transducer passes sequentially through resistive voltage change-over circuit and is connected with the input of Analog-digital Converter module with the first PID controller, described second temperature transducer passes sequentially through resistive voltage change-over circuit and is connected with the input of Analog-digital Converter module with the second PID controller；
The outfan of described first PID controller passes sequentially through PWM generator and is connected with the first insulation heating plate with PWM drive circuit, the outfan of described second PID controller passes sequentially through PWM generator and is connected with the 3rd insulation heating plate with PWM drive circuit, and the outfan of described 3rd PID controller passes sequentially through PWM generator and is connected with the second insulation heating plate with PWM drive circuit.
A kind of water content measurement apparatus the most according to claim 1, it is characterised in that: described serial ports sending module is connected with intelligent interaction instrument by RS485 modular converter, is connected with memory module with high in the clouds reception by WIFI module.
A kind of water content measurement apparatus the most according to claim 2, it is characterized in that: described water content measuring probe also includes insulating paint, described capacitance measurement probe is that both positive and negative polarity is to shape comb, shape comb is attached on high-k epoxy resin layer by described both positive and negative polarity, and is immersed in insulating paint, is fixed on by insulating paint on high-k epoxy resin layer；
Described both positive and negative polarity includes anelectrode, negative electrode, several paired positive pole comb and negative pole comb to shape comb, and described positive pole comb is parallel to anelectrode, and described negative pole comb is parallel to negative electrode, described positive pole comb and negative pole comb intersect plane arrange；
Described anelectrode, negative electrode, positive pole comb and negative pole comb all use the printing in PCB technology to cover copper.
A kind of water content measurement apparatus the most according to claim 2, it is characterised in that: described high-k epoxy resin layer uses FR-4 material.
A kind of water content measurement apparatus the most according to claim 4, it is characterised in that: described positive pole comb and negative pole comb are 15 comb, and the size of each comb is a length of 10mm, a width of 0.3mm, and the interval of adjacent fingers is 0.6mm.
A kind of water content measurement apparatus the most according to claim 4, it is characterized in that: described positive pole comb and negative pole comb are the most arranged in a crossed manner, the interleaving depth of positive pole comb and negative pole comb is 9.7mm, positive pole comb is 0.15mm away from the distance negative electrode edge, one end of anelectrode, and negative pole comb is 0.15mm away from the distance anelectrode edge, one end of negative electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620467883.1U CN205607913U (en) | 2016-05-20 | 2016-05-20 | Water content measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620467883.1U CN205607913U (en) | 2016-05-20 | 2016-05-20 | Water content measuring device |
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| Publication Number | Publication Date |
|---|---|
| CN205607913U true CN205607913U (en) | 2016-09-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620467883.1U Withdrawn - After Issue CN205607913U (en) | 2016-05-20 | 2016-05-20 | Water content measuring device |
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| Country | Link |
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| CN (1) | CN205607913U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105842306A (en) * | 2016-05-20 | 2016-08-10 | 南京信息工程大学 | Water content measuring device and measuring method |
| CN106770491A (en) * | 2017-01-18 | 2017-05-31 | 中国石油大学(华东) | Free water content on-line measurement device and method in oil pipeline |
-
2016
- 2016-05-20 CN CN201620467883.1U patent/CN205607913U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105842306A (en) * | 2016-05-20 | 2016-08-10 | 南京信息工程大学 | Water content measuring device and measuring method |
| CN106770491A (en) * | 2017-01-18 | 2017-05-31 | 中国石油大学(华东) | Free water content on-line measurement device and method in oil pipeline |
| CN106770491B (en) * | 2017-01-18 | 2019-04-30 | 中国石油大学(华东) | Free water content on-line measurement device and method in oil pipeline |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160928 Effective date of abandoning: 20180717 |