NZ791436B2 - Open channel flow monitoring apparatus - Google Patents
Open channel flow monitoring apparatusInfo
- Publication number
- NZ791436B2 NZ791436B2 NZ791436A NZ79143621A NZ791436B2 NZ 791436 B2 NZ791436 B2 NZ 791436B2 NZ 791436 A NZ791436 A NZ 791436A NZ 79143621 A NZ79143621 A NZ 79143621A NZ 791436 B2 NZ791436 B2 NZ 791436B2
- Authority
- NZ
- New Zealand
- Prior art keywords
- sensor
- fluid level
- data indicative
- open channel
- level
- Prior art date
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
- G01F23/14—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 measurement of pressure
-
- 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
- G01F23/14—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 measurement of pressure
- G01F23/18—Indicating, recording or alarm devices actuated electrically
-
- 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
- G01F23/28—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 the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/296—Acoustic waves
-
- 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
- G01F23/28—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 the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/296—Acoustic waves
- G01F23/2962—Measuring transit time of reflected waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F25/00—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume
- G01F25/20—Testing or calibration of apparatus for measuring volume, volume flow or liquid level or for metering by volume of apparatus for measuring liquid level
Abstract
There is provided an open channel flow monitoring apparatus for measuring a fluid level, the apparatus comprising: a first sensor configured to obtain data indicative of a fluid level below a first threshold level; a second sensor configured to obtain data indicative of fluid level above a second threshold level, which is lower than the first threshold level; wherein both the first sensor and the second sensor are configured to obtain data indicative of the fluid level when the fluid level is between the first threshold level and the second threshold.
Claims (13)
1. An open channel flow monitoring apparatus for measuring a fluid level, the apparatus comprising: a first sensor configured to obtain data indicative of a fluid level below a first threshold level; and a second sensor configured to obtain data indicative of fluid level above a second threshold level, which is lower than the first threshold level; wherein both the first sensor and the second sensor are configured to obtain data indicative of the fluid level when the fluid level is between the first threshold level and the second threshold, wherein the apparatus comprises a housing and a skirt portion that defines a recess within the housing, wherein the first sensor is substantially located within a recess defined by the skirt portion, wherein the first sensor and the second sensor are configured to output data indicative of the fluid level on a single data line, wherein the output data transitions seamlessly from data obtained from the first sensor to data obtained from the second sensor.
2. The open channel flow monitoring apparatus according to claim 1, wherein the apparatus is configured to calibrate the data indicative of fluid level obtained by the second sensor based on the data obtained by the first sensor indicative of the fluid level.
3. The open channel flow monitoring apparatus according to claim 2, wherein the apparatus is configured to calibrate the data indicative of fluid level obtained by the second sensor using the data indicative of the last stored fluid value obtained by the first sensor as the fluid level rises above the second threshold.
4. The open channel flow monitoring apparatus according to any one of the preceding claims, wherein the first sensor comprises an ultrasonic sensor.
5. The open channel flow monitoring apparatus according to any one of the preceding claims, wherein the second sensor comprises a pressure sensor.
6. The open channel flow monitoring apparatus according to claim 5, wherein the pressure sensor comprises a pressure probe configured to project to the second threshold level.
7. The open channel flow monitoring apparatus according to any one of the preceding claims, the apparatus comprising a temperature sensor.
8. The open channel flow monitoring apparatus according to any one of the preceding claims comprising a data logger configured to log the obtained data indicative of the fluid level.
9. The open channel flow monitoring apparatus according to any one of the preceding claims comprising a transmitter configured to transmit the obtained the obtained data indicative of the fluid level.
10. The open channel flow monitoring apparatus according to any one of the preceding claims, wherein the open channel flow is a sewer or a storm drain and the fluid level is a sewage or storm water level.
11. A method of measuring a fluid level in an open-channel system using the apparatus of any one of the preceding claims, the method comprising: obtaining, at a first sensor, data indicative of the fluid level below a second threshold level, which is lower than a first threshold level; obtaining, at both the first sensor and a second sensor, data indicative of fluid level between the first threshold level and the second threshold level; and obtaining, at the second sensor, data indicative of fluid level above the first threshold level, wherein the first sensor and the second sensor output data indicative of the fluid level on a single data line, wherein the output data transitions seamlessly from data obtained from the first sensor to data obtained from the second sensor.
12. The method of claim 11, comprising: calibrating the data indicative of the fluid level obtained by the second sensor based on the data obtained by the first sensor indicative of the fluid level.
13. A computer-readable storage medium comprising instructions, which when executed by a computer, cause the computer to carry out the method of any one of claims 11 or 12.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2000998.1A GB2591274B (en) | 2020-01-23 | 2020-01-23 | Open channel flow monitoring apparatus |
| PCT/GB2021/050106 WO2021148778A1 (en) | 2020-01-23 | 2021-01-18 | Open channel flow monitoring apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NZ791436A NZ791436A (en) | 2025-02-28 |
| NZ791436B2 true NZ791436B2 (en) | 2025-06-04 |
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