CN202041329U

CN202041329U - Ultrasonic heat meter

Info

Publication number: CN202041329U
Application number: CN2011201256695U
Authority: CN
Inventors: 丛培涛; 庞月亮; 罗力伟; 路荣波
Original assignee: ZIBO FANGYUE ELECTRONICS CO Ltd
Current assignee: ZIBO FANGYUE ELECTRONICS CO Ltd
Priority date: 2011-04-26
Filing date: 2011-04-26
Publication date: 2011-11-16
Anticipated expiration: 2021-04-26

Abstract

An ultrasonic heat meter belongs to the filed of a heat measuring instrument, comprises a flow measurement pipe body and a temperature sensor respectively arranged on an ascending pipe and a down pipe, and is characterized in that an ultrasonic sensor is arranged on the flow measurement pipe body; the output end of the ultrasonic sensor is connected with the input end of an integrating instrument through a flow chip group; the output end of the temperature sensor is connected with the input end of the integrating instrument through a temperature chip group; and the output end of the integrating instrument is connected with a display device. The flow chip group accurately quantifies the time interval through the absolute time of a logical gate by using signals, and the measurement of the signal time interval of Germany GP2 (Group 2) is improved by more than one time to achieve 32 ps on the basis of 65 ps precision, so that the accurate measurement of heat under small flow can be well realized. The ultrasonic heat meter adopts the latest flow conversion chip group, thereby greatly reducing the error combined with advanced single-chip processing technology; and the ultrasonic heat meter is simple in structure, convenient to install, stable, and high in repeatability.

Description

Ultrasonic type heat energy table

Technical field

The utility model provides a kind of ultrasonic type heat energy table, belongs to heat energy surveying instrument field.

Background technology

Along with the reform of China's benefit system and the standard of thermal metering, under the energy-saving and emission-reduction policy was guided, household metering was imperative.At present existing a lot of cities are in the policy of actively carrying out household metering, because most heat energy tables use the core component of traditional mechanical rotor formula flowmeter as flow measurement, and current national conditions sewerage closed cycle system normally, water quality is relatively poor, stop up easily the rotor of flowmeter, influence measuring accuracy even block the rotor of flowmeter.Therefore need often to safeguard that operating cost is higher and serviceable life is generally not long.In addition, the precision of the measurement of temperature is limited, and the variation of environment temperature causes measuring the drift of temperature, all directly affects the degree of accuracy of cold and hot measurement amount.

At present, mechanical type heat energy table has begun to step down from the stage of history on the market, and ultrasound wave will be used more widely universal in a large number.What domestic ultrasonic type heat energy table major part all adopted is the flow conversion chip group of German import, still exists relatively distinct issues, under the situation of low discharge, is difficult to guarantee its degree of accuracy, and stability, repeated relatively poor.The market supply of material is untimely, costs an arm and a leg.

The utility model content

According to above the deficiencies in the prior art, the technical problems to be solved in the utility model is: the error that provides a kind of accuracy class that overcomes under the low discharge to cause is big, stable, the ultrasonic type heat energy table of poor repeatability.

The technical scheme that its technical matters that solves the utility model adopts is: a kind of ultrasonic type heat energy table, comprise flow measurement body and the temperature sensor that is separately positioned on ascending tube and down pipe, it is characterized in that: the flow measurement body is provided with ultrasonic sensor, the output terminal of ultrasonic sensor connects the input end of integrating instrument by the flow chipset, the output terminal of temperature sensor is by the input end of chip temperature group connection integrating instrument, and the output terminal of integrating instrument is provided with the connection display device.

Obtain the temperature signal that the fluid ascending tube enters the mouth and down pipe exports by temperature sensor, obtain the digital signal that directly to calculate of needs again by the chip temperature group; The flow measurement body both can be that ascending tube also can be that down pipe can both detect, flow obtains flow signal by ultrasonic flow sensor, obtain the digital signal that directly to calculate of needs again by the flow chipset, the input integrating instrument obtains the heat result at last and shows by display device by calculating.By increasing temperature sensor water temperature is detected, the difference of the enthalpy when the different water temperature is compensated, further improve its degree of accuracy.

Wherein preferred version is:

Described ultrasonic sensor comprises pipeline section and transducer, and pipeline section and flow measurement body are 30 °-60 ° angle, and the pipeline section two ends are provided with transducer respectively, the input end of the output terminal connection traffic chipset of transducer.Flow signal is gathered by following current transducer and adverse current transducer respectively in the pipeline section two ends, improves acquisition precision.

Described flow chipset comprise pulse signal generator, A/D converter and digit time converter, ultrasonic sensor connects pulse signal generator, pulse signal generator is connected integrating instrument by A/D converter with time-to-digit converter, digit time converter to adopt classical precision be the TDC chip of 32ps.The flow chipset is enhanced about more than once the single time interval measurement of German GP2 on the basis of typical accuracy 65ps, can be good at realizing the accurate measurement of heat under the low discharge.

The beneficial effect that the utility model ultrasonic type heat energy table is had is: by a pair of temperature sensor being installed in respectively on the ascending tube and down pipe by heat transport fluid, flow sensor is installed on fluid intake or the recirculatory pipe, integrating instrument is gathered the signal from ultrasound wave and temperature sensor, comprise the A/D conversion by a series of chip, pulse producer, digit time converter etc., utilize the integrating formula to handle and calculate the heat that heat-exchange system obtains at the MSP430 single-chip microcomputer, and finish demonstration, overcome the big defective of error that the accuracy class under the low discharge causes.The utility model has adopted up-to-date flow conversion chip group, and the single-chip microcomputer treatment technology in conjunction with advanced significantly reduces error, and is simple in structure, easy for installation, stable, repeatability height.

Description of drawings

Fig. 1 is a functional-block diagram of the present utility model;

Fig. 2 is the synoptic diagram of installing and using of the present utility model;

Wherein: 1, body 2, thermometer hole 3, pipeline section 4, terminal box 5, transducer.

Embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is described further:

As shown in Figure 1, temperature sensor is separately positioned on ascending tube and down pipe, the flow measurement body is provided with ultrasonic sensor, the output terminal of ultrasonic sensor connects the input end of integrating instrument by the flow chipset, the output terminal of temperature sensor is by the input end of chip temperature group connection integrating instrument, and the output terminal of integrating instrument is provided with the connection display device.

The flow chipset comprise pulse signal generator, A/D converter and digit time converter, ultrasonic sensor connects pulse signal generator, pulse signal generator is connected integrating instrument by A/D converter with time-to-digit converter, and converter employing digit time precision is the TDC chip of 32ps.The flow chipset utilizes signal to postpone to come the precise quantification time interval by the absolute time of logic gate, the single time interval measurement of German GP2 is enhanced about more than once on the basis of typical accuracy 65ps, can be good at realizing the accurate measurement of heat under the low discharge.

As shown in Figure 2, ultrasonic sensor comprises pipeline section 3 and transducer 5, and pipeline section 3 is 30 °-60 ° angle with the center line of flow measurement body 1, and pipeline section 3 two ends are provided with transducer 5 respectively, the input end of the output terminal connection traffic chipset of transducer 5.Flow signal is gathered by following current transducer and adverse current transducer respectively in pipeline section 3 two ends, improves acquisition precision.Thermometer hole 2 is set on the body 1 is convenient to mounting temperature sensor.Pipeline section 3 is provided with terminal box 4, is used to be provided with connection integrating instrument and display device.

Integrating instrument, chip temperature group and display device are common prior art in the utility model, its setting and use to industry technician and grasped.

Principle of work and use:

Obtain the temperature signal of fluid ascending tube inlet and down pipe outlet by temperature sensor, obtain the digital signal that directly to calculate of needs again by the chip temperature group, by increasing temperature sensor water temperature is detected, difference to the enthalpy when the different water temperature compensates, and further improves its degree of accuracy; The flow measurement body both can be that ascending tube also can be a down pipe, can both detect, flow obtains flow signal by ultrasonic flow sensor, obtain the digital signal that directly to calculate of needs again by the flow chipset, the input integrating instrument obtains the heat result at last and shows by display device by calculating.The flow chipset utilizes signal to postpone to come the precise quantification time interval by the absolute time of logic gate, the single time interval measurement of German GP2 is enhanced about more than once on the basis of precision 65ps reaches 32ps, can be good at realizing the accurate measurement of heat under the low discharge.

Claims

1. ultrasonic type heat energy table, comprise flow measurement body and the temperature sensor that is separately positioned on ascending tube and down pipe, it is characterized in that: the flow measurement body is provided with ultrasonic sensor, the output terminal of ultrasonic sensor connects the input end of integrating instrument by the flow chipset, the output terminal of temperature sensor is by the input end of chip temperature group connection integrating instrument, and the output terminal of integrating instrument is provided with the connection display device.

2. ultrasonic type heat energy table according to claim 1, it is characterized in that: described ultrasonic sensor comprises pipeline section and transducer, pipeline section and flow measurement body are 30 °-60 ° angle, the pipeline section two ends are provided with transducer respectively, the input end of the output terminal connection traffic chipset of transducer.

3. ultrasonic type heat energy table according to claim 1 and 2, it is characterized in that: described flow chipset comprise pulse signal generator, A/D converter and digit time converter, ultrasonic sensor connects pulse signal generator, pulse signal generator is connected integrating instrument by A/D converter with time-to-digit converter, and converter employing digit time precision is the TDC chip of 32ps.