JPS647319Y2 - - Google Patents
Info
- Publication number
- JPS647319Y2 JPS647319Y2 JP1983196166U JP19616683U JPS647319Y2 JP S647319 Y2 JPS647319 Y2 JP S647319Y2 JP 1983196166 U JP1983196166 U JP 1983196166U JP 19616683 U JP19616683 U JP 19616683U JP S647319 Y2 JPS647319 Y2 JP S647319Y2
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- sample
- moisture content
- microwave
- weight
- 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.)
- Expired
Links
- 239000008187 granular material Substances 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 238000005259 measurement Methods 0.000 description 18
- 238000001514 detection method Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000002023 wood Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000010355 oscillation Effects 0.000 description 3
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000011121 hardwood Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000011122 softwood Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
Description
【考案の詳細な説明】
考案の分野
本考案はマイクロ波の減衰を利用した粉粒体の
含水率測定装置に関する。[Detailed Description of the Invention] Field of the Invention The present invention relates to a device for measuring the moisture content of powder or granular material using microwave attenuation.
従来技術
粉粒体の含水率を測定するのにマイクロ波を用
いる方法は特開昭56−39448号、実開昭56−92843
号等によつて既に提案されている。しかし、これ
らのマイクロ波法は米粒のように対象物が一定し
ている場合には良好な結果を与えるものと思われ
るが、対象物が一定しない場合には例えば絶乾法
のような直接的な方法で測定された含水率とマイ
クロ波の減衰から推定される含水率との間にはか
なりのばらつきが認められる。例えば木材パルプ
原料の木材チツプの含水率を測定する場合、同じ
木材チツプでも樹種特に広葉樹か針葉樹かでも異
つた結果が出るし、測定空間における試料の充填
度合によつても異つた結果が出るので、マイクロ
波減衰量から単一の算式によつて含水率を求める
と云うことができず、実用性が乏しい。Prior art Methods using microwaves to measure the moisture content of powder and granular materials are disclosed in Japanese Patent Application Laid-open No. 56-39448 and Utility Model Application No. 56-92843.
It has already been proposed by No. However, these microwave methods seem to give good results when the target object is constant, such as rice grains, but when the target object is not constant, direct methods such as the bone-drying method can be used. There is considerable variation between the moisture content measured by conventional methods and the moisture content estimated from microwave attenuation. For example, when measuring the moisture content of wood chips used as a raw material for wood pulp, the same wood chips will give different results depending on the type of wood, especially hardwood or softwood, and also depending on the degree of filling of the sample in the measurement space. However, it is not possible to calculate the water content from the amount of microwave attenuation using a single formula, and this method is impractical.
しかし、この点に関しては、本件出願人におけ
る研究によつて、マイクロ波減衰量から試料含水
率を求める計算式に、測定空間に装填する試料の
重量を計算因子として導入することにより、木材
チツプの樹種の違い、測定空間への試料の装填量
の違いに関係なく一定の算式で直接測定の結果と
一致する含水率を求める方法が見出された。 However, regarding this point, the applicant's research has shown that the weight of the sample loaded in the measurement space is introduced as a calculation factor into the calculation formula for calculating the sample moisture content from the microwave attenuation. A method has been discovered that uses a fixed formula to determine the moisture content that matches the results of direct measurement, regardless of differences in tree species or the amount of sample loaded into the measurement space.
目 的
本考案は上述方法を実施するための一つの装置
を提案するものである。Purpose The present invention proposes an apparatus for carrying out the above method.
構 成
今測定空間が空のときのマイクロ波検波強度を
Vi、測定空間に試料を装填したときのマイクロ
波検波強度をVsとし、ΔV＝Vi−Vsとおく。ま
た測定空間に装填される試料の重量をＷ、含水量
をｗとすると、含水率は（ｗ／Ｗ）×100％…(1)
で定義され、Ａ，Ｂ，Ｃ，を実験定数として、
ΔV＝Ａ＋Bw＋CW …(2)
が成立つ。Ａ，Ｂ，Ｃは含水率既知の試料を用い
て決定される。Configuration The microwave detection intensity when the measurement space is empty is
Let Vi and the microwave detection intensity when the sample is loaded in the measurement space be Vs, and ΔV=Vi−Vs. Also, if the weight of the sample loaded in the measurement space is W and the water content is w, the water content is (w/W) x 100%...(1)
ΔV=A+Bw+CW...(2) holds, where A, B, and C are experimental constants. A, B, and C are determined using a sample with a known moisture content.
(1)，(2)式を用いて、
＝ΔV−Ａ−CW／BW×100％ …(3)
(3)式でＡ，Ｂ，Ｃは実験的に定められる定数、
ΔV，Ｗは直接測定により求められる量である。 Using equations (1) and (2), =ΔV-A-CW/BW×100%...(3) In equation (3), A, B, and C are constants determined experimentally,
ΔV and W are quantities determined by direct measurement.
本考案は上記(3)式によつて粉粒体の含水率を測
定する装置であつて、筒軸を垂直に配置した筒体
の上下に開閉自在に扉を設け、同筒体の上方にホ
ツパを配置し、同筒体に固設した支腕と受枠との
間に感圧素子を介在させて同筒体の重量を検出す
るようにすると共に同筒体の上下両端に設けられ
る扉の一方にマイクロ波発振アンテナを、他方に
マイクロ波受信アンテナを取付けた構造を有す
る。 The present invention is a device for measuring the moisture content of powder or granular materials using the above equation (3), and has doors that can be opened and closed above and below a cylinder whose cylinder axis is vertically arranged. The weight of the cylinder is detected by placing a hopper and interposing a pressure-sensitive element between the support arm and the receiving frame fixed to the cylinder, and the door installed at both the upper and lower ends of the cylinder. It has a structure in which a microwave oscillation antenna is attached to one side and a microwave reception antenna is attached to the other.
実施例
図面は本考案の一実施例装置を示す。１は測定
空間を形成する金属筒体で、上部側面に支腕２が
固設してあり、受枠３との間に感圧素子４を介在
させて、筒体１を支承すると共にその重量が検出
できるようになつている。受枠３には筒体１の上
方位置にホツパ５が取付けてあり、試料の木材チ
ツプを筒体１内に装入するようにしてある。受枠
３の下部にはベルトコンベア６が設けてあつて、
筒体１から排出された試料を運び去るようになつ
ている。７は筒体１の底蓋扉でエアシリンダ８の
プランジヤロツドに連結され、筒体１の下部の水
平ガイド９に沿つて左右に摺動可能であり、右方
に進出した位置で筒体１の下開口を閉じ、左方に
後退すると筒体１の内容物が自重で排出される。
１０は筒体１の上蓋扉で、下蓋扉と同様エアシリ
ンダ１１のプランジヤロツドに連結され、水平ガ
イド１２によつて左右に摺動可能であると共に、
右前縁に押し板１３が取付けてある。ホツパ５を
通して筒体１内に供給された試料がレベルセンサ
２０の高さまで装入されたことが同レベルセンサ
によつて検出されると、それから一定時間後にコ
ンベア２１が停止して試料の供給が停止され、そ
のとき試料が筒体１の上部口縁から多少盛り上つ
ているように上記一定時間が定めてあり、上蓋扉
１０の前縁の押し板１３によつてこの盛り上りを
押し除けて、試料が筒体１内にすり切り一杯に装
入されるようにしてある。この上蓋扉１０のガイ
ド１２は受枠３に固定されているので、その重量
は感圧素子４には加重されない。１４は上蓋扉１
０に取付けられ、筒体１内に向つて開口した導波
管であり、マイクロ波を筒体１内に向つて発射す
る。１５は底蓋扉７に取付けられた導波管で到来
したマイクロ波を検波回路１６に導く。１７は筒
体１の側面に取付けられたエアノズルで、測定終
了後筒体１の内面に付着して残つている試料を吹
き落し、筒体内を清掃するためのものである。１
８は受枠３に取付けられ筒体１の外面に軽く接触
するローラで、筒体１は支腕２で感圧素子４上に
乗つているだけなので、横方向に位置がずれるの
を防いでいる。１９は筒体１の側面に設けられた
温度センサで試料の温度を検出し、測定精度の向
上を計つている。Embodiment The drawing shows an embodiment of the present invention. Reference numeral 1 denotes a metal cylindrical body that forms a measurement space, and a support arm 2 is fixed on the upper side surface, and a pressure-sensitive element 4 is interposed between it and a receiving frame 3 to support the cylindrical body 1 and to reduce its weight. It is now detectable. A hopper 5 is attached to the receiving frame 3 at a position above the cylindrical body 1, and the wood chips as a sample are charged into the cylindrical body 1. A belt conveyor 6 is provided at the bottom of the receiving frame 3.
The sample discharged from the cylindrical body 1 is carried away. 7 is connected to the plunger rod of the air cylinder 8 at the bottom cover door of the cylinder 1, and can slide left and right along the horizontal guide 9 at the bottom of the cylinder 1. When the lower opening is closed and the cylinder is retreated to the left, the contents of the cylinder 1 are discharged by its own weight.
Reference numeral 10 designates the upper cover door of the cylinder 1, which is connected to the plunger rod of the air cylinder 11 in the same way as the lower cover door, and is capable of sliding left and right by a horizontal guide 12.
A push plate 13 is attached to the right front edge. When the level sensor detects that the sample supplied into the cylinder 1 through the hopper 5 has reached the height of the level sensor 20, the conveyor 21 stops after a certain period of time and the sample supply is stopped. The above-mentioned fixed time is set so that the sample rises up from the upper edge of the cylinder 1 at that time, and this rise is pushed away by the push plate 13 at the front edge of the upper lid door 10. , the sample is charged into the cylinder 1 until it is fully cut. Since the guide 12 of the upper lid door 10 is fixed to the receiving frame 3, its weight is not applied to the pressure sensitive element 4. 14 is the upper lid door 1
This is a waveguide that is attached to the cylindrical body 1 and opens into the cylindrical body 1, and emits microwaves into the cylindrical body 1. Reference numeral 15 guides the arriving microwave to a detection circuit 16 through a waveguide attached to the bottom cover door 7. Reference numeral 17 denotes an air nozzle attached to the side surface of the cylinder 1, which is used to blow off the sample remaining on the inner surface of the cylinder 1 after the measurement is completed, and to clean the inside of the cylinder. 1
Reference numeral 8 denotes a roller that is attached to the receiving frame 3 and makes light contact with the outer surface of the cylinder 1. Since the cylinder 1 only rests on the pressure-sensitive element 4 with the support arm 2, it prevents the cylinder from shifting in the horizontal direction. . Reference numeral 19 detects the temperature of the sample with a temperature sensor provided on the side surface of the cylindrical body 1 to improve measurement accuracy.
筒体１は断面の寸法が300×200mm、高さ600mm、
使用マイクロ波の周波数は1GHz、発振出力５ワ
ツトであり、木材チツプの測定重量は５〜12Kgの
範囲で一回の測定所要時間は約40秒である。測定
は筒体１の底蓋を閉じ、ホツパ５から試料を筒体
１内に投入し、重量を検出してメモリに入力し、
マイクロ波を送つて検波出力を検出し、予め測定
してある筒体１の空重量、空の筒体１を通してマ
イクロ波を送つたときの検波出力のデータを用い
て、試料だけの重量W0、試料によるマイクロ波
の減衰量を算出し、前記(3)式によつて含水率を求
める。他方筒体の上下の蓋を開いて試料を下方の
コンベア６に排出し、その後エアノズル１７から
筒体１内にエアーを噴射して筒体１内面に付着し
ているチツプを清掃して一回の測定のシーケンス
を終る。以上のシーケンス制御及び検出されたデ
ータに対するデータ処理、含水率の算出等はマイ
クロコンピユータによつて行われる。 Cylindrical body 1 has a cross-sectional dimension of 300 x 200 mm, a height of 600 mm,
The frequency of the microwave used is 1 GHz and the oscillation output is 5 watts.The weight of the wood chips measured is in the range of 5 to 12 kg, and the time required for one measurement is about 40 seconds. For measurement, close the bottom cover of the cylinder 1, put the sample into the cylinder 1 from the hopper 5, detect the weight, and input it into the memory.
Send a microwave and detect the detection output, and use the empty weight of the cylinder 1 measured in advance and the data of the detection output when the microwave is sent through the empty cylinder 1 to calculate the weight of the sample alone W 0 , the amount of microwave attenuation due to the sample is calculated, and the water content is determined using the above equation (3). On the other hand, the upper and lower lids of the cylinder are opened to discharge the sample onto the conveyor 6 below, and then air is injected into the cylinder 1 from the air nozzle 17 to clean the chips adhering to the inner surface of the cylinder 1. ends the sequence of measurements. The above sequence control, data processing of detected data, calculation of moisture content, etc. are performed by a microcomputer.
効 果
本考案は縦軸に配置した筒体の上下開口に開閉
蓋扉を設け、試料を筒体上方から筒体内に供給
し、下開口から自重で排出するようになつている
ので、測定自体はバツチ方式で行われているが、
試料の移動が重力に従い自然に行われるので、試
料の供給排出が迅速にでき、簡単に自動測定がで
き、上下の蓋扉にマイクロ波の発射部と受信部を
設けたので、筒体の全長がマイクロ波の吸収に利
用でき、測定精度が向上するもので、木材チツプ
のようなパイプ輸送に不向きな試料に対し高能
率、高精度の含水率測定ができるようになる。Effects In this invention, opening/closing lid doors are provided at the top and bottom openings of the cylinder arranged on the vertical axis, and the sample is supplied into the cylinder from the top and discharged by its own weight from the bottom opening, making the measurement itself easier. is carried out in a batch manner,
Since the sample moves naturally according to gravity, the sample can be quickly supplied and discharged, and automatic measurement can be easily performed.Since the microwave emitting and receiving sections are installed in the upper and lower lid doors, the entire length of the cylinder can be adjusted. can be used to absorb microwaves, improving measurement accuracy, making it possible to perform high-efficiency, high-precision moisture content measurements on samples that are unsuitable for pipe transportation, such as wood chips.
図面は本考案の一実施装置の側面図である。
１……筒体、２……支腕、３……受枠、４……
感圧センサ、５……ホツパ、６……コンベア、７
……底蓋扉、８……エアシリンダ、９……ガイ
ド、１０……上蓋扉、１１……エアシリンダ、１
３……押し板、１４……マイクロ波発振用導波
管、１５……受信用導波管、１６……検波回路、
１７……エアノズル、１８……ローラ、１９……
温度センサ、２０……レベルセンサ、２１……コ
ンベア。
The drawing is a side view of an apparatus for implementing the present invention. 1... Cylinder body, 2... Support arm, 3... Receiving frame, 4...
Pressure sensor, 5...Hopper, 6...Conveyor, 7
...Bottom cover door, 8...Air cylinder, 9...Guide, 10...Top cover door, 11...Air cylinder, 1
3... Push plate, 14... Waveguide for microwave oscillation, 15... Waveguide for reception, 16... Detection circuit,
17... Air nozzle, 18... Roller, 19...
Temperature sensor, 20... Level sensor, 21... Conveyor.
Claims (1)
扉を設け、上記筒体の上方に試料供給ホツパを配
置し、上記上下の開閉扉の一方にマイクロ波発射
部を、他方にマイクロ波受信部を取付け、上記筒
体を感圧素子を介して受枠に支承せしめて筒体及
び筒体内装入物の重量を測定するようにし、マイ
クロ波の減衰量ΔVと筒内試料重量Ｗとから 含水率＝ΔV−Ａ−CW／BW×100％ Ａ，Ｂ，Ｃ＝実験定数 上式のように試料の含水率を求めることを特徴
とする粉粒体の含水率測定装置。[Scope of Claim for Utility Model Registration] Opening/closing doors are provided at both the upper and lower openings of the cylinder arranged on the vertical axis, a sample supply hopper is arranged above the cylinder, and one of the upper and lower opening/closing doors is provided with opening/closing doors. The emitting part is attached to the other side, and the microwave receiving part is attached to the other, and the cylinder is supported by a receiving frame via a pressure-sensitive element to measure the weight of the cylinder and the contents inside the cylinder, and the attenuation amount ΔV of the microwave is measured. and the weight of the sample in the cylinder W. Moisture content = ΔV - A - CW / BW x 100% A, B, C = experimental constants Moisture content of powder and granular material characterized by determining the moisture content of the sample as in the above formula rate measuring device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19616683U JPS60102660U (en) | 1983-12-19 | 1983-12-19 | Powder moisture content measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19616683U JPS60102660U (en) | 1983-12-19 | 1983-12-19 | Powder moisture content measuring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60102660U JPS60102660U (en) | 1985-07-12 |
| JPS647319Y2 true JPS647319Y2 (en) | 1989-02-27 |
Family
ID=30421024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19616683U Granted JPS60102660U (en) | 1983-12-19 | 1983-12-19 | Powder moisture content measuring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60102660U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5643540A (en) * | 1979-09-19 | 1981-04-22 | Shinichi Sasaki | Water content measuring unit of pulverulent fluid and conttonlike body |
| JPS56128448A (en) * | 1980-03-13 | 1981-10-07 | Satake Eng Co Ltd | Measuring apparatus of moisture in grain |
-
1983
- 1983-12-19 JP JP19616683U patent/JPS60102660U/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5643540A (en) * | 1979-09-19 | 1981-04-22 | Shinichi Sasaki | Water content measuring unit of pulverulent fluid and conttonlike body |
| JPS56128448A (en) * | 1980-03-13 | 1981-10-07 | Satake Eng Co Ltd | Measuring apparatus of moisture in grain |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60102660U (en) | 1985-07-12 |
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