JPS57211515A - Detector for amount of stock of aggregate in hot-bin in asphalt plant - Google Patents
Detector for amount of stock of aggregate in hot-bin in asphalt plantInfo
- Publication number
- JPS57211515A JPS57211515A JP56098045A JP9804581A JPS57211515A JP S57211515 A JPS57211515 A JP S57211515A JP 56098045 A JP56098045 A JP 56098045A JP 9804581 A JP9804581 A JP 9804581A JP S57211515 A JPS57211515 A JP S57211515A
- Authority
- JP
- Japan
- Prior art keywords
- stock
- circuit
- aggregate
- amount
- bin
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
- G01F23/263—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors
- G01F23/266—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields by measuring variations in capacitance of capacitors measuring circuits therefor
Abstract
PURPOSE:To detect an amount of stock throughout the whole stock of aggregate without switching by a simple constitution wherein an output of an oscillating circuit whose oscillation frequency varies according to the change of capacity of a hot-bin capacitor is detected through the intermediary of a frequency-voltage conversion circuit. CONSTITUTION:An output of an oscillating circuit 13 whose oscillation frequency varies according to the change of capacity of a capacitor 12 whose electrodes are formed of both walls of a hot-bin is converted into a change in voltage by a frequency-voltage conversion circuit 14 composed of a resistor 15 and a capacitor 16. The output voltage of the circuit 14 is delivered as an amount of stock of aggregate through the intermediary of an AC amplifier circuit 17, a rectifying circuit 18, a differential amplifier circuit 19 and a bias circuit 20. Accordingly, by a simple constitution requiring no tap-switching and the like, the amount of stock of aggregate is detected throughout the whole stock thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56098045A JPS57211515A (en) | 1981-06-24 | 1981-06-24 | Detector for amount of stock of aggregate in hot-bin in asphalt plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56098045A JPS57211515A (en) | 1981-06-24 | 1981-06-24 | Detector for amount of stock of aggregate in hot-bin in asphalt plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS57211515A true JPS57211515A (en) | 1982-12-25 |
Family
ID=14209174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56098045A Pending JPS57211515A (en) | 1981-06-24 | 1981-06-24 | Detector for amount of stock of aggregate in hot-bin in asphalt plant |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57211515A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62274222A (en) * | 1986-05-23 | 1987-11-28 | Nouken Kogyo Kk | Electrostatic capacity type level detecting device |
-
1981
- 1981-06-24 JP JP56098045A patent/JPS57211515A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62274222A (en) * | 1986-05-23 | 1987-11-28 | Nouken Kogyo Kk | Electrostatic capacity type level detecting device |
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