JPH039251A - Method and device for measuring water of humid thin aggregate - Google Patents
Method and device for measuring water of humid thin aggregateInfo
- Publication number
- JPH039251A JPH039251A JP14440389A JP14440389A JPH039251A JP H039251 A JPH039251 A JP H039251A JP 14440389 A JP14440389 A JP 14440389A JP 14440389 A JP14440389 A JP 14440389A JP H039251 A JPH039251 A JP H039251A
- Authority
- JP
- Japan
- Prior art keywords
- fine aggregate
- wet fine
- humid
- electromagnetic waves
- water
- 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.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims description 13
- 238000006073 displacement reaction Methods 0.000 claims abstract description 17
- 239000012212 insulator Substances 0.000 claims abstract description 17
- 238000004364 calculation method Methods 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 6
- 230000001678 irradiating effect Effects 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012935 Averaging Methods 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 238000012805 post-processing Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000002352 surface water Substances 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、生コンクリートの製造に用いられる湿潤細骨
材（砂）の水分計７１１１方法とその装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method and apparatus for measuring the moisture content of wet fine aggregate (sand) used in the production of ready-mixed concrete.
適切な生コンクリートの製造、品質管理上、練り混ぜ水
量を的確に把握することが重要で、この練り混ぜ水量を
正確に知るためには、水量に影響を及ぼすと考えられる
骨材、特に湿潤細骨材の水分量（表面水量）を把握する
必要がある。For proper production and quality control of ready-mixed concrete, it is important to accurately understand the amount of mixing water. It is necessary to understand the moisture content (surface water content) of the aggregate.
従来、湿潤細骨材の水分量を電気的に計Ｄ１する方法、
装置としては、湿潤細骨材の導電性を；１計１するもの
、湿潤細骨材の静電容量を計測するもの等が知られてい
る。Conventionally, a method of electrically measuring the moisture content of wet fine aggregate D1,
As devices, there are known devices that measure the electrical conductivity of wet fine aggregate, and devices that measure the capacitance of wet fine aggregate.
前者は、湿潤細骨材中に対向配置した電極に、伝導電流
を流し、その導電率を求めてこれを水分量に変換するも
のであり、後者は、湿潤細骨材中に対向配置した電極に
、高周波数の伝導電流を流し、その静電容量を求めてこ
れを水分量に変換するものである。In the former method, a conduction current is passed through electrodes placed opposite each other in wet fine aggregate, and the conductivity is determined and converted into water content. A high-frequency conduction current is applied to the capacitor, and the capacitance is determined and converted to water content.
しかしながら、従来の前者の方法、装置によれば、導電
率は、水分以外の要因、例えばイオン、物質の種類によ
って大きく変化するため、塩分の影響を受け、海砂に使
用できない問題がある。However, according to the conventional former method and apparatus, the conductivity varies greatly depending on factors other than moisture, such as ions and the type of substance, so there is a problem that it cannot be used for sea sand because it is affected by salt.
又、後者の方法、装置によれば、ｎｊ定時に湿潤細骨材
にストレスを与えるため、湿潤細骨材中の水分が移動す
る問題がある。Further, according to the latter method and apparatus, stress is applied to the wet fine aggregate at regular times, so there is a problem that water in the wet fine aggregate moves.
更に、両者とも、電極を湿潤細骨材中に配置するため、
摩耗に対する保守、点検を必要とする問題があると共に
、−層の計測スピードの向上が望まれている。Furthermore, in both cases, the electrodes are placed in wet fine aggregate;
There is a problem of requiring maintenance and inspection for wear, and there is a desire to improve the measurement speed of the negative layer.
そこで、本発明は、氷島外の影響を受けることがないと
共に、測定後の後処理及び機械的なメンテナンスを要せ
ず、かつ計測スピードの一層の向上をなし得る湿潤細骨
材の水分計測方法とその装置の提供を目的とする。Therefore, the present invention provides moisture measurement of wet fine aggregate that is not affected by the outside of the ice island, does not require post-processing or mechanical maintenance after measurement, and can further improve measurement speed. The purpose of this invention is to provide a method and an apparatus for the same.
前記課題を解決するため、第１の発明は、湿潤細骨材に
耐摩耗性の板状絶縁体を介在して電磁波を照射し、この
電磁波によって湿潤細骨材に流れる変位電流を検出する
と共に、検出値を水分量に変換する方法である。In order to solve the above problems, a first invention irradiates electromagnetic waves to wet fine aggregate through a wear-resistant plate insulator, detects a displacement current flowing through the wet fine aggregate by the electromagnetic waves, and , is a method of converting the detected value into moisture content.
第２の発明は、計量に伴って流下する湿潤細骨材に耐摩
耗性の板状絶縁体を介在して電磁波を連続照射し、この
電磁波によって湿潤細骨材に流れる変位電流を連続して
検出すると共に、検出値の平均値を求め、かつ平均水分
量に変換する方法である。The second invention is to continuously irradiate electromagnetic waves through a wear-resistant plate-like insulator to wet fine aggregate flowing down during weighing, and to continuously generate a displacement current flowing through the wet fine aggregate by the electromagnetic waves. This is a method of detecting moisture content, calculating the average value of the detected values, and converting the detected values into an average moisture content.
第３の発明は、第１の発明の方法の実施に供した装置で
、湿潤細骨材が表面に接触する耐摩耗性の板状絶縁体と
、高周波電源と接続されて板状絶縁体の裏面に適宜に離
隔して取り付けられ、電磁波を発振する１対の電極と、
高周波電源と１対の電極との間に介挿され、湿潤細骨材
に流れる変位電流を検出する共振回路と、共振囲路の検
出値を水分量に変換する変換装置とを備えたものである
。A third invention is an apparatus used for carrying out the method of the first invention, which comprises: a wear-resistant plate-shaped insulator whose surface is in contact with wet fine aggregate; and a plate-shaped insulator connected to a high-frequency power source. A pair of electrodes that are attached to the back surface at appropriate distances and that oscillate electromagnetic waves;
It is inserted between a high frequency power source and a pair of electrodes, and is equipped with a resonant circuit that detects the displacement current flowing through the wet fine aggregate, and a conversion device that converts the detected value of the resonant circuit into water content. be.
第４の発明は、第２の発明の方法の実施に供した装置で
、計量に伴って流下する湿潤細骨材が表面に接触する耐
摩耗性の板状絶縁体と、高周波電源と接続されて板状絶
縁体の裏面に適宜に離隔して取り付けられ、電磁波を連
続発振する１対の電極と、高周波電源と１対の電極との
間に介挿され、湿潤細骨材に流れる変位電流を連続して
検出する共振回路と、共振回路の連続する検出値の平均
値を演算する平均演算装置と、平均演算装置の演算値を
平均水分量に変換する変換装置とを備えたものである。A fourth invention is an apparatus for carrying out the method of the second invention, which is connected to a wear-resistant plate-shaped insulator whose surface is in contact with the wet fine aggregate flowing down during weighing, and a high-frequency power source. A displacement current is inserted between a pair of electrodes that continuously oscillate electromagnetic waves, which are attached to the back surface of a plate-shaped insulator at an appropriate distance, and a high-frequency power source and the pair of electrodes, and which flows through the wet fine aggregate. A resonant circuit that continuously detects water content, an average calculation device that calculates the average value of successive detection values of the resonance circuit, and a conversion device that converts the calculated value of the average calculation device into an average moisture content. .
上記第１と第３の手段においては、電磁波によって流れ
る変位電流は、誘電率に関係して流れ、水の誘電率が乾
燥細骨材のそれに比して大きいために湿潤細骨材の誘電
率は水分に比例した値となって瞬時に検出され、かつ湿
潤細骨材にストレスを与えない。In the first and third means described above, the displacement current flowing due to electromagnetic waves flows in relation to the dielectric constant, and since the dielectric constant of water is larger than that of dry fine aggregate, the dielectric constant of wet fine aggregate is is a value proportional to the moisture content and can be detected instantaneously, and does not give stress to the wet fine aggregate.
又、湿潤細骨材と１対の電極との間の距離が、常に一定
に保たれ、かつ電極が湿潤細骨材と接触することがない
。Further, the distance between the wet fine aggregate and the pair of electrodes is always kept constant, and the electrodes do not come into contact with the wet fine aggregate.
第２と第４の手段においては、第１と第３の手段と同様
の作用の他に、計量中の湿潤細骨材の水分量が三次元的
に連続して計測され、計量湿潤細骨材全量の平均水分量
が求められる。In the second and fourth means, in addition to the same effects as the first and third means, the moisture content of the wet fine aggregate being measured is continuously measured three-dimensionally, and the wet fine aggregate is The average moisture content of the entire material is determined.
耐摩耗性の板状絶縁体としては、板状のアルミナ（Ａｌ
ｌ） ２０３）セラミックス、窒化けい素（Ｓｉ３Ｎ４
）セラミックス、その他が用いられる。As a wear-resistant plate-shaped insulator, plate-shaped alumina (Al
l) 203) Ceramics, silicon nitride (Si3N4
) Ceramics, etc. are used.
電磁波は、一定の周波数であることが好ましく、その周
波数は、１〜４００Ｍ１ｌｚ、特に５０Ｍｌ１ｚ程度が
好ましい。The electromagnetic waves preferably have a constant frequency, and the frequency is preferably about 1 to 400 M11z, particularly about 50 M11z.
変位電流を検出する共振回路は、並列又は直列のいずれ
の共振回路でもよい。The resonant circuit for detecting the displacement current may be either a parallel or series resonant circuit.
以下、本発明の一実施ｆすを図面と共に説明する。 Hereinafter, one embodiment of the present invention will be described with reference to the drawings.
第１図は本発明に係る湿潤細骨Ｈの水分計ｄｐ１装置の
概略構成図である。FIG. 1 is a schematic diagram of a moisture meter dp1 device for wet bone H according to the present invention.
図中１は湿潤細骨祠を収容する湿潤細骨材ストックビン
で、そのゲート１ａ付近の上方のハウジングには、水分
センサー２が耐摩耗性の板状絶縁体であるアルミナセラ
ミックス板３をハウジング内に臨ませて取り付けられて
いる。In the figure, 1 is a wet fine aggregate stock bin that accommodates a wet fine aggregate stock bin, and a moisture sensor 2 is attached to an alumina ceramic plate 3, which is a wear-resistant plate-shaped insulator, in the upper housing near the gate 1a. It is installed facing inside.
水分センサー２は、湿潤細骨材に含まれる水゛分量を検
出するもので、第２図に詳記するように、高周波電源４
と接続されて上記アルミナセラミックスｔｌｉ２３の裏
面に適宜にＭ隔して取り付けられ、５０ＭＨｚ、 ０．
５Ｗの電磁波を連続発振する１対の電極５と、高周波電
源４と一方の電極５との間に直列接続した抵抗６及び電
極５並びに抵抗６と並列接続したインダクタンスコイル
７からなり、電磁波によって湿潤細骨材に流れる変位電
流を連続して検出する並列共振回路と、アルミナセラミ
ックス板３の裏面に取り付けられ、湿潤細骨材の温度を
連続して検出する温度センサー８と、これらを覆い、か
つ前記湿潤細骨材ストックビン１のハウジングに取り付
けるためのケーシング９とからなる。The moisture sensor 2 detects the amount of water contained in the wet fine aggregate, and as detailed in FIG.
50 MHz, 0.
It consists of a pair of electrodes 5 that continuously oscillate 5W electromagnetic waves, a resistor 6 connected in series between the high frequency power source 4 and one electrode 5, and an inductance coil 7 connected in parallel with the electrode 5 and the resistor 6. A parallel resonant circuit that continuously detects the displacement current flowing through the fine aggregate, a temperature sensor 8 that is attached to the back surface of the alumina ceramic plate 3 and that continuously detects the temperature of the wet fine aggregate, and a temperature sensor 8 that covers these and and a casing 9 for attachment to the housing of the wet fine aggregate stock bin 1.
上記水分センサー２においては、高周波電源の周波数を
一定にしておくと、電磁波によって連続して湿潤細骨材
に流れる変位電流は、水の誘電率が乾燥細骨材のそれに
比して大きいため、湿潤細骨材の誘電率は水分量に比例
する連続した値となる。この変位電流は、並列共振回路
の抵抗６を流れ、電圧として検出され、連続した電気信
号ｅ１として水分センサー２から出力される一方、温度
センサー８によって検出された値は、連続した電気信号
ｅ２として水分センサー２から出力される。In the moisture sensor 2, when the frequency of the high-frequency power source is kept constant, the displacement current that continuously flows through the wet fine aggregate due to electromagnetic waves is caused by the fact that the dielectric constant of water is larger than that of the dry fine aggregate. The dielectric constant of wet fine aggregate is a continuous value proportional to the water content. This displacement current flows through the resistor 6 of the parallel resonant circuit, is detected as a voltage, and is output from the moisture sensor 2 as a continuous electrical signal e1, while the value detected by the temperature sensor 8 is detected as a continuous electrical signal e2. Output from moisture sensor 2.
水分センサー２からの連続した電気信号ｅ１は、第１図
に示すように、平均演算装置１０に入力され、ゲート開
の信号Ｇ。と同期して平均演算されて平均値ｅ１ｍ、ｖ
が求められ、かつ平均値ｅ１１１．ｖが変換装置１１に
入力されて平均水分量ＷＱｌｌ、ｖｌ：変換される。そ
して、平均水分子ｆｉｗＱ、。は、必要に応じて平均含
水率や平均表面水率等に変換される。The continuous electric signal e1 from the moisture sensor 2 is inputted to the averaging device 10, as shown in FIG. 1, and a gate open signal G is generated. The average is calculated in synchronization with the average value e1m,v
is determined, and the average value e111. v is input to the conversion device 11 and converted into average water content WQll, vl:. And the average water molecule fiwQ,. is converted into average water content, average surface water content, etc. as necessary.
上記宅均演算装置ｌＯにおける平均演算は、例えば第３
図に示すように、水分センサー２から出力される電気信
号ｅ１をアンプ１２で増幅した後、電圧−周波数（Ｖ
−Ｆ）変換器１３により変換し、この周波数をカウンタ
ー１４でカウントすると共に、プログラムによって平均
演算器１５をゲート開の信号Ｇ。に同期させて動作させ
て平均値ｅ１□を算出させる。The average calculation in the above-mentioned home equity calculation device 1O is performed by, for example, the third
As shown in the figure, after the electric signal e1 output from the moisture sensor 2 is amplified by the amplifier 12, the voltage-frequency (V
-F) Signal G which is converted by the converter 13, this frequency is counted by the counter 14, and the gate of the average calculator 15 is opened according to the program. The average value e1□ is calculated by operating in synchronization with .
又は、第４図に示すように、水分センサー２から出力さ
れる電気信号ｅ１をアンプ１２で増幅した後、Ａ／Ｄ変
換器１６で間欠的にディジタル変換し、このディジタル
信号の平均値を平均演算器１５によってゲート開の信号
Ｇ。と同期して求めるようにしてもよい。Alternatively, as shown in FIG. 4, the electric signal e1 output from the moisture sensor 2 is amplified by the amplifier 12, then intermittently converted into digital data by the A/D converter 16, and the average value of this digital signal is averaged. A gate open signal G is generated by the arithmetic unit 15. It may also be determined in synchronization with.
なお、水分センサー２からの電気信号ｅ２は、図示は省
略するがアンプにより増幅された後、電気信号ｅ１とほ
ぼ同様に平均値が演算され、温度によって変化する水の
誘電率、すなわち平均水分量の補正に用いられる。The electric signal e2 from the moisture sensor 2 is amplified by an amplifier (not shown), and then its average value is calculated in almost the same way as the electric signal e1, and the dielectric constant of water, which changes depending on the temperature, that is, the average moisture content. used for correction.
上記構成の湿潤細骨材の水分計ｆｌｌｌＪ装置において
は、計量に伴って流下する湿潤細骨材に、アルミナセラ
ミックス板２を介在して１対の電極５から電磁波が連続
して照射され、この電磁波によって湿潤細骨材に流れる
変位電流が、湿潤細骨材の水分量に比例した値となって
瞬時に共振回路によって連続して計測されると共に、平
均演算装置１ｏによってその平均値を求められ、かつ変
換装置１１により平均水分量に換算され、必要に応じて
平均水分量の温度補正がなされる。In the wet fine aggregate moisture analyzer fllllJ device with the above configuration, electromagnetic waves are continuously irradiated from a pair of electrodes 5 through an alumina ceramic plate 2 to the wet fine aggregate flowing down during measurement. The displacement current flowing through the wet fine aggregate due to electromagnetic waves becomes a value proportional to the moisture content of the wet fine aggregate, which is instantaneously and continuously measured by a resonant circuit, and the average value is determined by the average calculation device 1o. , and is converted into an average moisture content by the conversion device 11, and temperature correction of the average moisture content is performed as necessary.
計量湿潤細骨材全量に対する測定値の精度と感度は、０
．５％以下であった。The accuracy and sensitivity of the measured value for the total amount of weighed wet fine aggregate is 0.
．． It was less than 5%.
なお、計量前の水分量の計測は、平均演算装置ＩＯを除
外したもので、瞬時に行うことができた。Note that the measurement of the moisture content before measurement could be performed instantaneously without using the average calculation device IO.
以上のように第１と第３の発明によれば、電磁波によっ
て流れる変位電流が、誘電率に関係して流れ、水の誘電
率は、乾燥細骨材のそれに比して大きいために湿潤細骨
材の誘電率は水量に比例した値となって瞬時に検出され
、かつ湿潤細骨材にストレスを与えないので、水の分離
影響を受けることなく、塩分の影響も受けない。一方、
測定後の湿潤細骨材に対する後処理が不要となり、計測
スピードを飛躍的に向上することができた。As described above, according to the first and third inventions, the displacement current that flows due to electromagnetic waves flows in relation to the dielectric constant, and since the dielectric constant of water is larger than that of dry fine aggregate, wet fine aggregate The permittivity of the aggregate is a value proportional to the amount of water and can be detected instantly, and since no stress is applied to the wet fine aggregate, it is not affected by water separation or salt. on the other hand,
This eliminates the need for post-processing of the wet fine aggregate after measurement, making it possible to dramatically improve measurement speed.
又、湿潤細骨材と１対の電極との間の距離が、常に一定
に保たれるので、測定精度を長期間に亘って良好に保持
できる、かつ機械的メンテナンスを不要にすることがで
きる。In addition, since the distance between the wet fine aggregate and the pair of electrodes is always kept constant, measurement accuracy can be maintained well over a long period of time, and mechanical maintenance can be eliminated. .
図は本発明の一実施例を示すもので、第１図は湿潤細骨
材の水分計測装置の概略構成図、第２図は水分センサー
の概念図、第３図は平均演算装置の一実施例の構成図、
第４図は平均演算装置の他の実施例の構成図である。
１・・・湿潤細骨材ストックビン
２・・・水分センサー
３・・・アルミナセラミックス板
４・・・高周波電源 ５・・・電 極６・・・
抵 抗
７・・・インダクタンスコイルThe figures show one embodiment of the present invention. Figure 1 is a schematic diagram of a moisture measuring device for wet fine aggregate, Figure 2 is a conceptual diagram of a moisture sensor, and Figure 3 is an implementation of an average calculation device. Example configuration diagram,
FIG. 4 is a block diagram of another embodiment of the averaging device. 1... Moist fine aggregate stock bin 2... Moisture sensor 3... Alumina ceramic plate 4... High frequency power supply 5... Electrode 6...
Resistance 7...Inductance coil
Claims (4)
磁波を照射し、この電磁波によって湿潤細骨材に流れる
変位電流を検出すると共に、検出値を水分量に変換する
ことを特徴とする湿潤細骨材の水分計測方法。(1) Wet fine aggregate is irradiated with electromagnetic waves through a wear-resistant plate-shaped insulator, and the electromagnetic waves are used to detect the displacement current flowing through the wet fine aggregate, and the detected value is converted into water content. A method for measuring the moisture content of wet fine aggregate.
状絶縁体を介在して電磁波を連続照射し、この電磁波に
よって湿潤細骨材に流れる変位電流を連続して検出する
と共に、検出値の平均値を求め、かつ平均水分量に変換
することを特徴とする湿潤細骨材の水分計測方法。(2) Electromagnetic waves are continuously irradiated to the wet fine aggregate flowing down during weighing through a wear-resistant plate insulator, and the displacement current flowing through the wet fine aggregate is continuously detected by the electromagnetic waves. , a method for measuring moisture in wet fine aggregate, characterized in that the average value of detected values is determined and converted into an average moisture content.
体と、高周波電源と接続されて板状絶縁体の裏面に適宜
に離隔して取り付けられ、電磁波を発振する１対の電極
と、高周波電源と１対の電極との間に介挿され、湿潤細
骨材に流れる変位電流を検出する共振回路と、共振回路
の検出値を水分量に変換する変換装置とを備えたことを
特徴とする湿潤細骨材の水分計測装置。(3) A wear-resistant plate-shaped insulator whose surface is in contact with the wet fine aggregate, and a pair of plate-shaped insulators connected to a high-frequency power source and attached at appropriate distances from each other on the back surface of the plate-shaped insulator to oscillate electromagnetic waves. A resonant circuit that is inserted between the electrode, a high frequency power source, and a pair of electrodes and detects a displacement current flowing through the wet fine aggregate, and a conversion device that converts the detected value of the resonant circuit into a moisture content. A moisture measuring device for wet fine aggregate, which is characterized by:
る耐摩耗性の板状絶縁体と、高周波電源と接続されて板
状絶縁体の裏面に適宜に離隔して取り付けられ、電磁波
を連続発振する１対の電極と、高周波電源と１対の電極
との間に介挿され、湿潤細骨材に流れる変位電流を連続
して検出する共振回路と、共振回路の連続する検出値の
平均値を演算する平均演算装置と、平均演算装置の演算
値を平均水分量に変換する変換装置とを備えたことを特
徴とする湿潤細骨材の水分計測装置。(4) A wear-resistant plate-shaped insulator whose surface is in contact with the wet fine aggregate flowing down during weighing, and a plate-shaped insulator connected to a high-frequency power source and installed at an appropriate distance on the back surface of the plate-shaped insulator to prevent electromagnetic waves. A pair of electrodes that continuously oscillate the current, a resonant circuit that is inserted between the high frequency power source and the pair of electrodes, and that continuously detects the displacement current flowing through the wet fine aggregate, and a continuous detection value of the resonant circuit. 1. A moisture measuring device for wet fine aggregate, comprising: an average calculation device that calculates an average value; and a conversion device that converts the calculated value of the average calculation device into an average moisture content.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14440389A JPH039251A (en) | 1989-06-07 | 1989-06-07 | Method and device for measuring water of humid thin aggregate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14440389A JPH039251A (en) | 1989-06-07 | 1989-06-07 | Method and device for measuring water of humid thin aggregate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH039251A true JPH039251A (en) | 1991-01-17 |
Family
ID=15361360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14440389A Pending JPH039251A (en) | 1989-06-07 | 1989-06-07 | Method and device for measuring water of humid thin aggregate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH039251A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0557658U (en) * | 1992-01-08 | 1993-07-30 | 株式会社守谷商会 | Microwave moisture analyzer |
| JP2002071676A (en) * | 2000-08-24 | 2002-03-12 | Kurihara:Kk | Moisture measuring device, aggregate storage hopper and moisture measuring method |
| CN112748130A (en) * | 2020-12-23 | 2021-05-04 | 中山艾尚智同信息科技有限公司 | Main structure of aggregate moisture content rapid determination sensor based on microwave method |
-
1989
- 1989-06-07 JP JP14440389A patent/JPH039251A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0557658U (en) * | 1992-01-08 | 1993-07-30 | 株式会社守谷商会 | Microwave moisture analyzer |
| JP2002071676A (en) * | 2000-08-24 | 2002-03-12 | Kurihara:Kk | Moisture measuring device, aggregate storage hopper and moisture measuring method |
| CN112748130A (en) * | 2020-12-23 | 2021-05-04 | 中山艾尚智同信息科技有限公司 | Main structure of aggregate moisture content rapid determination sensor based on microwave method |
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