CN104729603A - Ultrasonic thermo-sensitive temperature measuring device - Google Patents
Ultrasonic thermo-sensitive temperature measuring device Download PDFInfo
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- CN104729603A CN104729603A CN201510102115.6A CN201510102115A CN104729603A CN 104729603 A CN104729603 A CN 104729603A CN 201510102115 A CN201510102115 A CN 201510102115A CN 104729603 A CN104729603 A CN 104729603A
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Abstract
An ultrasonic thermo-sensitive temperature measuring device comprises a flow pipe, a first ultrasonic energy converter, a second ultrasonic energy converter, a first thermo-sensitive body and a second thermo-sensitive body, wherein the flow pipe is provided with a fluid inlet and a fluid outlet. The first thermo-sensitive body and the second thermo-sensitive body are composed of thermal strain pieces sensitive to temperature, and the first thermo-sensitive body and the second thermo-sensitive body are installed at the two ends of the flow pipe of heat transport fluid respectively in a sealed mode; the first ultrasonic energy converter and the second ultrasonic energy converter are installed on the first thermo-sensitive body and the second thermo-sensitive body at the two ends of the flow pipe respectively. When the temperature of the heat transport fluid changes, the length of the thermo-sensitive bodies changes, so that the distance between the first energy converter and the second energy converter is changed due to the change, and the flow and the temperature of the fluid are calculated. The ultrasonic thermo-sensitive temperature measuring device is high in interference resistance and detection precision, saves energy and is low in manufacturing cost and easy and convenient to install and maintain, and the flow and the temperature of hot water can be calculated through one time of detection.
Description
Technical field
The present invention relates to measuring instrument technical field, particularly relating to can the ultrasound wave temperature-sensitive thermo detector scale of a metered flow and temperature.
Background technology
Current, ultrasonic calorimeter is precisely more and more widely used with its measurement, and especially in measurement of hot water field, its advantage and the space of future development are inestimable.Current ultrasound wave hot water gauging table all will carry out two kinds of detections: one is by ultrasound examination flow, and two is by thermistor detected temperatures, and shows the flow of fluid by integraph, and it comprises the high-tech product of machinery, electronics and infotech.But problem is this gauging table is all by powered battery mostly, twice detection (running software time long) consuming time and power consumption (two overlap testing circuit) too large, thus it is too fast to cause battery electric quantity to decline, be no more than 6 years average life, much market be all due to consider change battery factor and do not want to adopt this product, this is a large short slab of ultrasound wave hot water gauging table market development.
Present invention eliminates thermistor, a kind of only by a pair ultrasonic transducer, do the device that one-time detection can obtain flow and temperature, effectively shorten the working time of MCU (single-chip microcomputer), save effect and can reach more than the one times energy, make average life more than more than 10 years.
Summary of the invention
The technical problem to be solved in the present invention is, provide a kind of antijamming capability strong, accuracy of detection is high, and save the energy, and cost is low, installation and maintenance are easy, do one-time detection and just can calculate the flow of fluid and the ultrasound wave temperature-sensitive temperature measuring equipment of temperature.
The technical scheme adopted is:
Ultrasound wave temperature-sensitive temperature measuring equipment, comprises flowtube, the first ultrasonic transducer, the second ultrasonic transducer, the first thermo-detective material, the second thermo-detective material with fluid intake and fluid egress point.The first described thermo-detective material, the second thermo-detective material are made up of thermally sensitive thermal strain sheet, described first thermo-detective material, the second thermo-detective material seal the flowtube two ends being arranged on heat transport fluid respectively, on the first thermo-detective material that described first ultrasonic transducer, the second ultrasonic transducer are arranged on flowtube two ends respectively and the second thermo-detective material, when the change of heat transport fluid temperature can make the length of thermo-detective material body change, this change makes the distance between the first transducer and the second transducer change, and utilizes computing formula to calculate flow and the temperature of fluid.
This device is exactly mainly power-saving technology problem in order to solve ultrasonic heat water meter, which eliminates the circuit by thermistor detected temperatures, and uses thermo-detective material (pure mechanical hook-up) instead and coordinate with ultrasound wave, and one-time detection just can calculate flow and the temperature of hot water.This device antijamming capability is strong, and accuracy of detection is high, and save the energy, and cost is low, installation and maintenance are easy.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
Ultrasound wave temperature-sensitive temperature measuring equipment, comprises flowtube 5, first ultrasonic transducer 1, second ultrasonic transducer 2, first thermo-detective material 3, second thermo-detective material 4 with fluid intake and fluid egress point.The first described thermo-detective material 3, second thermo-detective material 4 is made up of thermally sensitive thermal strain sheet, described first thermo-detective material 3, second thermo-detective material 4 seals flowtube 5 two ends being arranged on heat transport fluid respectively, described first ultrasonic transducer 1, on the first thermo-detective material 3 that second ultrasonic transducer 2 is arranged on flowtube 5 two ends respectively and the second thermo-detective material 4, when the change of heat transport fluid temperature can make the length of thermo-detective material body change, this change makes the distance between the first transducer and the second transducer change, count Δ L, fundamental distance counts L, namely total distance is L
t:
L
t=L+ Δ L (formula 1-1)
1, set now that flow velocity is as zero, when temperature is a steady state value (distance between two transducers is L), the numerical value measured by ultrasonic transducer is:
The numerical value that can be recorded by the first ultrasonic transducer is adverse current time quantum, counts t
n0.
The numerical value that can be recorded by the second ultrasonic transducer is adverse current time quantum, counts t
s0.
Calculated flow rate is carried out as follows by these two values recorded:
Δ t
0=t
n0-t
s0(formula 1-2)
By the ultimate principle of ultrasonic measurement, come by this mathematic interpolation outflow.
2, establish now that flow velocity is non-vanishing, temperature also there occurs change, and (distance between two transducers is L
t), the numerical value measured by ultrasonic transducer is:
The numerical value that can be recorded by the first ultrasonic transducer is adverse current time quantum, counts t
n1.
The numerical value that can be recorded by the second ultrasonic transducer is adverse current time quantum, counts t
s1.
Can think for these two:
T
n1=t
n0+ Δ t
1+ Δ t
2(formula 1-3)
T
s1=t
s0-Δ t
1+ Δ t
2(formula 1-4)
Δ t
1the variable that flow velocity produces when changing, Δ t
2the variable produced when being the spacing generation Δ L change of two ultrasonic transducers.
Calculated flow rate is carried out again as follows by these two values recorded:
Δt
0’= t
n1- t
s1
=( t
n0+Δt
1+Δt
2)-( t
s0-Δt
1+Δt
2)
=t
n0-t
s0+ 2 Δ t
1(formula 1-5)
(formula 1-5) compares with (formula 1-1), and the change due to flow velocity makes Δ t
0' and Δ t
0create 2 Δ t
1increment, this just we need.As can be seen from the deduction process of (formula 1-5) also, the spacing of two ultrasonic transducers changes and can not produce any impact (because the temperature variation in hot water is more than level second to ultrasonic measurement flow velocity, and ultrasound wave both forward and reverse directions detect between poor time be only Microsecond grade, that is the error produced flow rate detection due to the change of thermo-detective material between positive and negative twice detection is negligible, if need higher precision can be revised by the account form of temperature compensation).And if we adopt the computing method of ultrasonic measurement distance to calculate, as follows:
Δt
s’= (t
n1+ t
s1)/2
=【( t
n0+Δt
1+Δt
2)+( t
s0-Δt
1+Δt
2)】/2
=t
n0-t
s0+ 2 Δ t
2(formula 1-6)
As can be seen from the deduction process of (formula 1-6) also, Δ t
s' only reflect that the spacing of two ultrasonic transducers there occurs 2 Δ t
2change, and to have nothing to do with the change of flow velocity.Utilize this principle, we can convert out corresponding temperature variation simply, thus complete the measurement task to temperature.
Based on this theoretical principle above-mentioned, we only need do once hyperacoustic forward and reverse measurement can know flow value and temperature value, eliminate traditional temperature sensor, also substantially reduce the time of running software, play the effect of getting twice the result with half the effort, save the valuable energy.
The measuring accuracy of temperature is enough (as adopted GP2 from testing circuit, its accuracy of detection is higher than on very much), key is the rate of change of Δ L, as long as this parameter has enough large change space, the resolving accuracy of temperature just can fully be met, it is simple for addressing this problem, and increase what heat as long as more and answer sheet, its stacked variation delta L just can be enough large.
Claims (1)
1. ultrasound wave temperature-sensitive temperature measuring equipment, comprise the flowtube (5) with fluid intake and fluid egress point, first ultrasonic transducer (1), second ultrasonic transducer (2), first thermo-detective material (3), second thermo-detective material (4), it is characterized in that described the first thermo-detective material (3), second thermo-detective material (4) is made up of thermally sensitive thermal strain sheet, described first thermo-detective material (3), second thermo-detective material (4) seals flowtube (5) two ends being arranged on heat transport fluid respectively, described first ultrasonic transducer (1), on the first thermo-detective material (3) that second ultrasonic transducer (2) is arranged on flowtube (5) two ends respectively and the second thermo-detective material (4), when the change of heat transport fluid temperature can make the length of thermo-detective material body change, this change makes the distance between the first transducer and the second transducer change, computing formula is utilized to calculate flow and the temperature of fluid.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510102115.6A CN104729603A (en) | 2015-03-10 | 2015-03-10 | Ultrasonic thermo-sensitive temperature measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510102115.6A CN104729603A (en) | 2015-03-10 | 2015-03-10 | Ultrasonic thermo-sensitive temperature measuring device |
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|---|---|
| CN104729603A true CN104729603A (en) | 2015-06-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107847076A (en) * | 2015-07-01 | 2018-03-27 | 皇家戴维艾格伯茨有限公司 | Prepare the method for beverage and prepare the device of beverage |
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| JP2001215143A (en) * | 2000-02-02 | 2001-08-10 | Ricoh Elemex Corp | Ultrasonic measuring apparatus |
| CN202305061U (en) * | 2011-10-21 | 2012-07-04 | 西安旌旗电子股份有限公司 | Ultrasonic calorimeter with temperature compensation function |
| CN102959365A (en) * | 2010-06-24 | 2013-03-06 | 松下电器产业株式会社 | Ultrasonic flow rate measurement device |
| CN202814467U (en) * | 2012-05-03 | 2013-03-20 | 沈阳市航宇星仪表有限责任公司 | Ultrasonic water meter provided with square wave type flow channel |
| CN104048713A (en) * | 2014-06-06 | 2014-09-17 | 姜跃炜 | Ultrasonic wave transduction and temperature collector |
| CN204461511U (en) * | 2015-03-10 | 2015-07-08 | 沈阳市航宇星仪表有限责任公司 | Ultrasound wave temperature-sensitive temperature measuring equipment |
-
2015
- 2015-03-10 CN CN201510102115.6A patent/CN104729603A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001215143A (en) * | 2000-02-02 | 2001-08-10 | Ricoh Elemex Corp | Ultrasonic measuring apparatus |
| CN102959365A (en) * | 2010-06-24 | 2013-03-06 | 松下电器产业株式会社 | Ultrasonic flow rate measurement device |
| CN202305061U (en) * | 2011-10-21 | 2012-07-04 | 西安旌旗电子股份有限公司 | Ultrasonic calorimeter with temperature compensation function |
| CN202814467U (en) * | 2012-05-03 | 2013-03-20 | 沈阳市航宇星仪表有限责任公司 | Ultrasonic water meter provided with square wave type flow channel |
| CN104048713A (en) * | 2014-06-06 | 2014-09-17 | 姜跃炜 | Ultrasonic wave transduction and temperature collector |
| CN204461511U (en) * | 2015-03-10 | 2015-07-08 | 沈阳市航宇星仪表有限责任公司 | Ultrasound wave temperature-sensitive temperature measuring equipment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107847076A (en) * | 2015-07-01 | 2018-03-27 | 皇家戴维艾格伯茨有限公司 | Prepare the method for beverage and prepare the device of beverage |
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Application publication date: 20150624 |