CN1465965A - Heat quantity flow and temp. metering correcting method - Google Patents
Heat quantity flow and temp. metering correcting method Download PDFInfo
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- CN1465965A CN1465965A CNA021235961A CN02123596A CN1465965A CN 1465965 A CN1465965 A CN 1465965A CN A021235961 A CNA021235961 A CN A021235961A CN 02123596 A CN02123596 A CN 02123596A CN 1465965 A CN1465965 A CN 1465965A
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Abstract
The invention is a measurement correcting method of the flow and temperature of the heat meter. It uses the impeller gauging framework to convert the running of the impeller into electric pulse signal by the flow detecting sensor and makes record through the calcualtor, then according to the pre-marked flow coefficient Kv at different character temperature and flow points and the number of the electric pulse recorded, calculates the hot water bulk of the gauging framework; the calculator's temperature A/D part makes sampling measurement on the temperature sensor, performing dynamical whole correction to get the corrected temperature of entering-returning hot water. It improves the precision of the temperature A/D conversion of the calculator.
Description
Technical field: the invention belongs to the instrument and meter field of measuring technique, relate to a kind of measurement side of heat metering instrument of heat supply heating control metering system, the measurement modification method of particularly a kind of heat quantity flow and temperature.
Background technology: calorimeter all comprise at least flowmeter, temperature sensor to counter three parts.At present to forming with unit construction such as counter, its flowmeter has the function of independent metering hot water flow to the calorimeter of public offering and use by flowmeter, temperature sensor.The rotary wind type magnetic that generally adopts in the calorimeter passes the mechanical type hot water gauge, and the water yield of the flowmeter of flowing through is changed the rotation of impeller in its impeller metering mechanism, according to N=K
VThe relation of Q connects impeller rotation N and water yield Q, and the ratio of gear of gear counting mechanism has just been represented flow coefficient k
V, it is changeless, single.
In fact, rotary wind type magnetic passes mechanical type hot water gauge flow coefficient k
VRelevant with manufacturing and assembly precision, and with flow (flow velocity), variation of temperature changes, and particularly in the low discharge district that demarcates below the flow, its variation is more remarkable.Because hot water gauge factory does not have the hot water flow resistance standard test device, factory inspection is carried out on the cold water device, does not almost consider temperature convection coefficient of discharge K again
VInfluence, this type of water meter low reason of accuracy under high temperature and low discharge situation that Here it is, it can not satisfy the measuring requirement of calorimeter to hot water flow.
Commercially available rotary wind type magnetic passes mechanical type hot water gauge flow range all at several liters/hour to several cubic metres/hours, and the maximum flow of heat meter flow generally be no more than hundreds of liters/hour, therefore, directly selecting rotary wind type machinery hot water gauge for use is inappropriate as heat meter flow.
In addition, the family need be with temperature sensor to measuring water inlet, return water temperature when measuring heat with calorimeter, and traditional method is to adopt high-precision A/D converting system to measuring.In order to guarantee measuring accuracy, need adopt expensive temperature sensors of high precision to the strict control of precision of the ingredient of A/D converting system.Like this, just cause the production debug difficulties inevitably, cost of products increases.
Summary of the invention: purpose of the present invention is just in order to solve weak point of the prior art, the measurement modification method of a kind of monoblock type heat quantity flow and temperature has been proposed, this method adopts the coefficient of flow correction, temperature A/D conversion Real-time and Dynamic correction technique solves the low and higher problem of temperature A/D conversion cost of this type of water meter accuracy under high temperature and low discharge situation.
The object of the present invention is achieved like this:
The measurement modification method of a kind of heat quantity flow and temperature, measure heat by the calorimeter that constitutes by flowmeter, temperature sensor and counter, said flowmeter part by the special-purpose calibre-changeable low discharge that removes former hot water gauge gear counting mechanism (its flow range be tens of liters/hour to several hectolitres/hour) impeller metering mechanism, flow detection sensor and the counter of single current magnetic biography (doing) rotary wind type hot water gauge form.Impeller metering mechanism converts the rotation of impeller electric impulse signal to and carries out record by counter by flow detection sensor, according to the flow coefficient k of every flowmeter under different characteristic temperature spot, different characteristic flow point of prior demarcation
VCalculate the hot water volume that flows through impeller metering mechanism with the electric pulse number of record; The temperature A/D conversion portion of counter to sampled measurements, is implemented dynamically whole the correction to temperature sensor, obtains the return water temperature that advances through revising.
Purpose of the present invention can also be further perfect by following steps:
The bore of the special-purpose calibre-changeable low discharge impeller metering mechanism of the flowmeter in the measurement modification method of heat quantity flow and temperature changes in DN15～DN32, its flow range be tens of liters/hour～several hectolitres/hour; Coefficient of flow to each impeller metering mechanism of making is surveyed demarcation, the single coefficient of flow that adopts counter to replace the ratio of gear of former cause gear counting mechanism to determine with the coefficient of flow under different flow, the different temperatures according to temperature, flow, realize table one coefficient of flow or table one a group coefficient of flow, accomplish the coefficient of flow of each impeller metering mechanism is revised, for the K of each the flow point beyond the pattern measurement point
VCoefficient can be determined with method of difference according to this flow temperature of actual measurement; Temperature A/D conversion portion to counter carries out integral body correction, modification method is as follows: installation represents the precision resister of certain specified temp as the benchmark that the A/D conversion accuracy is revised in real time in counter, before each temperature sensor sampling earlier to the precision resister calculating of sampling, if the temperature A/D conversion portion of counter is measured the theoretical temperatures that conversion back indicating value temperature is not equal to its representative to this resistance, then counter is revised as correction its difference automatically to the A/D transformed error in the normal measuring process.
The present invention's advantage compared with prior art is: this method has effectively improved the temperature A/D conversion accuracy of counter, significantly reduced requirement to the relevant components and parts that influence the A/D converter precision in the counter, avoided stricter screening to components and parts, simplify production run, reduce components and parts cost and production cost.
The present invention has 1 width of cloth accompanying drawing, is the related calorimeter of most preferred embodiment of the present invention, also can make the accompanying drawing of specification digest.
The structural representation of Fig. 1, calorimeter.
Below in conjunction with accompanying drawing most preferred embodiment of the present invention is described further.
Most preferred embodiment of the present invention as shown in Figure 1, the measurement modification method of a kind of heat quantity flow and temperature, by by flowmeter, the calorimeter that temperature sensor and counter constitute is measured heat, said flowmeter part by the special-purpose calibre-changeable low discharge that removes former hot water gauge gear counting mechanism (its flow range be tens of liters/hour to several hectolitres/hour) the impeller metering mechanism 3 of single current magnetic biography (doing) rotary wind type hot water gauge, flow detection sensor 1 and counter 2 are formed, it is characterized in that: impeller metering mechanism 3 converts the rotation of impeller electric impulse signal to and carries out record by counter 2 by flow detection sensor 1, according to every flowmeter of prior demarcation at the different characteristic temperature spot, flow coefficient k under the different characteristic flow point
VCalculate the hot water volume that flows through impeller metering mechanism with the electric pulse number of record; The temperature A/D conversion portion of counter to sampled measurements, is implemented dynamically whole the correction to temperature sensor, obtains the return water temperature that advances through revising.
The bore of the special-purpose calibre-changeable low discharge impeller metering mechanism 3 of flowmeter changes in DN15～DN32, its flow range be tens of liters/hour～several hectolitres/hour.
Coefficient of flow to each impeller metering mechanism 3 of making is surveyed demarcation, the single coefficient of flow that adopts counter to replace the ratio of gear of former cause gear counting mechanism to determine with the coefficient of flow under different flow, the different temperatures according to temperature, flow, realize table one coefficient of flow or table one a group coefficient of flow, accomplish the coefficient of flow of each impeller metering mechanism is revised, for the K of each the flow point beyond the pattern measurement point
VCoefficient can be determined with method of difference according to this flow temperature of actual measurement.
Temperature A/D conversion portion to counter 2 carries out integral body correction, modification method is as follows: installation represents the precision resister of certain specified temp as the benchmark that the A/D conversion accuracy is revised in real time in counter, before each temperature sensor sampling earlier to the precision resister calculating of sampling, if the temperature A/D conversion portion of counter is measured the theoretical temperatures that conversion back indicating value temperature is not equal to its representative to this resistance, then counter is revised as correction its difference automatically to the A/D transformed error in the normal measuring process.
The hot water flow coefficient is to determine like this.
The impeller metering mechanism that produces is carried out the hot and cold water contrast test by statistical method, find the statistical law between the hot and cold water coefficient of flow, under the situation that material and technology are determined, difference therebetween should be a constant, can be determined the hot water flow COEFFICIENT K of corresponding discharge point thus by cold water test
VK for each the flow point beyond the pattern measurement point
VCoefficient can be determined with method of difference according to this flow and the temperature of actual measurement.
Because the coefficient of flow to the impeller metering mechanism that makes is surveyed demarcation, the single coefficient of flow that adopts counter to replace the ratio of gear of former cause gear counting mechanism to determine with the coefficient of flow under different flow, the different temperatures according to temperature, flow, realized coefficient of flow is revised, accomplish table one coefficient of flow or table one a group coefficient of flow, thereby improved the accuracy of flowmeter greatly, the following accuracy of flow of particularly demarcating.
Temperature A/D conversion portion to counter in the temperature survey process carries out integral body correction, modification method is as follows: installation represents the precision resister (resistance of this resistance and the theoretical temperatures of representative are by the characteristic decision of temperature sensor) of certain specified temp as the reference that the A/D conversion accuracy is revised in real time in counter, first to the precision resister calculating of sampling before each sampling, if the temperature A/D conversion portion of counter is measured the theoretical temperatures that conversion back indicating value temperature is not equal to its representative to this resistance, then counter is revised as correction its difference automatically to the A/D transformed error in the normal measuring process.This method has effectively improved the temperature A/D conversion accuracy of counter, significantly reduced requirement to the relevant components and parts that influence the A/D converter precision in the counter, avoided stricter screening, simplified production run, reduced components and parts cost and production cost components and parts.
Claims (4)
1, the measurement modification method of a kind of heat quantity flow and temperature, by by flowmeter, the calorimeter that temperature sensor and counter constitute is measured heat, said flowmeter part by the special-purpose calibre-changeable low discharge that removes former hot water gauge gear counting mechanism (its flow range be tens of liters/hour to several hectolitres/hour) the impeller metering mechanism (3) of single current magnetic biography (doing) rotary wind type hot water gauge, flow detection sensor (1) and counter (2) are formed, it is characterized in that: impeller metering mechanism (3) converts the rotation of impeller electric impulse signal to and carries out record by counter (2) by flow detection sensor (1), according to every flowmeter of prior demarcation at the different characteristic temperature spot, flow coefficient k under the different characteristic flow point
VCalculate the hot water volume that flows through impeller metering mechanism with the electric pulse number of record; The temperature A/D conversion portion of counter to sampled measurements, is implemented dynamically whole the correction to temperature sensor, obtains the return water temperature that advances through revising.
2, the measurement modification method of heat quantity flow according to claim 1 and temperature, it is characterized in that: the bore of the special-purpose calibre-changeable low discharge impeller metering mechanism (3) of said flowmeter changes in DN15～DN32, its flow range be tens of liters/hour～several hectolitres/hour.
3, the measurement modification method of heat quantity flow according to claim 1 and temperature, it is characterized in that: the coefficient of flow to each impeller metering mechanism (3) of making is surveyed demarcation, the single coefficient of flow that adopts counter to replace the ratio of gear of former cause gear counting mechanism to determine with the coefficient of flow under different flow, the different temperatures according to temperature, flow, realize table one coefficient of flow or table one a group coefficient of flow, accomplish the coefficient of flow of each impeller metering mechanism is revised, for the K of each the flow point beyond the pattern measurement point
VCoefficient can be determined with method of difference according to this flow temperature of actual measurement.
4, the measurement modification method of heat quantity flow according to claim 1 and temperature, it is characterized in that: the temperature A/D conversion portion to counter (2) carries out integral body correction, modification method is as follows: installation represents the precision resister of certain specified temp as the benchmark that the A/D conversion accuracy is revised in real time in counter, before each temperature sensor sampling earlier to the precision resister calculating of sampling, if the temperature A/D conversion portion of counter is measured the theoretical temperatures that conversion back indicating value temperature is not equal to its representative to this resistance, then counter is revised as correction its difference automatically to the A/D transformed error in the normal measuring process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021235961A CN1294409C (en) | 2002-07-05 | 2002-07-05 | Heat quantity flow and temp. metering correcting method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021235961A CN1294409C (en) | 2002-07-05 | 2002-07-05 | Heat quantity flow and temp. metering correcting method |
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| Publication Number | Publication Date |
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| CN1465965A true CN1465965A (en) | 2004-01-07 |
| CN1294409C CN1294409C (en) | 2007-01-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB021235961A Expired - Fee Related CN1294409C (en) | 2002-07-05 | 2002-07-05 | Heat quantity flow and temp. metering correcting method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1301398C (en) * | 2005-02-25 | 2007-02-21 | 西北工业大学 | Equal water quantity correcting and regulating method of telemetering water meter accuracy |
| CN100460818C (en) * | 2006-06-23 | 2009-02-11 | 辽宁环佳高科节能技术工程有限公司 | Split heat supply temperature-control charging device and heat fee calculation method |
| CN102062651B (en) * | 2009-11-18 | 2012-06-13 | 杨明忠 | Dynamic detection method for temperature of heat meter |
| CN102538914A (en) * | 2011-12-26 | 2012-07-04 | 宁波水表股份有限公司 | Electronic water meter with correction function |
| CN106097585A (en) * | 2016-06-15 | 2016-11-09 | 信东仪器仪表（苏州）有限公司 | A kind of IC-card controller charging method and instrument |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2034689U (en) * | 1988-07-23 | 1989-03-22 | 上海大华仪表厂 | Measuring instrument for hot water temp. |
| GB8819442D0 (en) * | 1988-08-16 | 1988-09-21 | Nat Nuclear Corp Ltd | Heat transfer measurement |
| CN1141559C (en) * | 2001-06-15 | 2004-03-10 | 西安交通大学 | Heat signal converting method and device based on variable vane wheel |
-
2002
- 2002-07-05 CN CNB021235961A patent/CN1294409C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1301398C (en) * | 2005-02-25 | 2007-02-21 | 西北工业大学 | Equal water quantity correcting and regulating method of telemetering water meter accuracy |
| CN100460818C (en) * | 2006-06-23 | 2009-02-11 | 辽宁环佳高科节能技术工程有限公司 | Split heat supply temperature-control charging device and heat fee calculation method |
| CN102062651B (en) * | 2009-11-18 | 2012-06-13 | 杨明忠 | Dynamic detection method for temperature of heat meter |
| CN102538914A (en) * | 2011-12-26 | 2012-07-04 | 宁波水表股份有限公司 | Electronic water meter with correction function |
| CN102538914B (en) * | 2011-12-26 | 2014-12-17 | 宁波水表股份有限公司 | Electronic water meter with correction function |
| CN106097585A (en) * | 2016-06-15 | 2016-11-09 | 信东仪器仪表（苏州）有限公司 | A kind of IC-card controller charging method and instrument |
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| Publication number | Publication date |
|---|---|
| CN1294409C (en) | 2007-01-10 |
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Granted publication date: 20070110 Termination date: 20110705 |