CN201392255Y - Ultrasonic-wave calorimeter integrating measurement of flow rate and temperature - Google Patents
Ultrasonic-wave calorimeter integrating measurement of flow rate and temperature Download PDFInfo
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- CN201392255Y CN201392255Y CN200920021197U CN200920021197U CN201392255Y CN 201392255 Y CN201392255 Y CN 201392255Y CN 200920021197 U CN200920021197 U CN 200920021197U CN 200920021197 U CN200920021197 U CN 200920021197U CN 201392255 Y CN201392255 Y CN 201392255Y
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Abstract
The utility model discloses a ultrasonic-wave calorimeter integrating measurement of flow rate and temperature, which consists of a shell (1), a cover plate (2), a liquid crystal display screen (3), inquiry keystrokes (4) and a circuit board, and is characterized in that the lower side of the circuit board is provided with a high-precise time-interval measurement chip (14), a central processor (6) is connected with the high-precise time-interval measurement chip (14), and the high-precise time-interval measurement chip (14) is also connected with a flow-rate measurement pulse shaping simulation signal circuit (8) and a temperature measurement resistance capacitance charging-discharging circuit (7). Since one chip is utilized to simultaneously measure the flow rate and the temperature, the structure of the ultrasonic-wave calorimeter is greatly simplified and miniaturized; since the ultrasonic calorimeter adopts the fully electronic measurement and does not have any mechanical movement part, the ultrasonic calorimeter is uneasy to be damaged and has long service life.
Description
Technical field
The utility model relates to a kind of improvement of ultrasonic calorimeter, specifically a kind of afflux amount and unified ultrasonic calorimeter of measuring of temperature of measuring flow and temperature with the high precision time interval measurement technology.
Technical background
Thermal gauge is the device that heat is carried out measuring fixed amount, needs the parameter of metering to have: thermal power, heat accumulative, integrated flow etc.And its basic parameter that need measure has only two: instantaneous delivery and temperature (inflow temperature, return water temperature), other amounts all are to be calculated by these two fundamental quantities to obtain.Therefore these two fundamental quantities are measured to such an extent that whether accurately just directly have influence on the accuracy of whole heat metering.Current, the measurement of instantaneous delivery is mainly contained two kinds: mechanical type and ultrasonic type; Measurement to temperature also has two kinds: AD change type and compare and measure formula.Mechanical type is measured flow its intrinsic shortcoming: be subjected to big, the easy obstruction of influence, the appearance measurement easy to wear of mechanical rotation part of water quality inaccurate, and big to resistance to water-flow, so seldom use.The ultrasound wave hotlist is the development trend of current thermal gauge.Utilize ultrasound wave different principle of travel-time in the current of different in flow rate, its core is the measurement of ultrasonic propagation time.But from present time interval measurement technology, its deficiency is: the one, and measuring accuracy does not reach requirement, and the 2nd, the circuit complexity, the 3rd, measurement stability is poor.Temperature survey generally is to use platinum resistance, obtains temperature by the resistance of platinum resistance and the corresponding relation of temperature.Therefore the measurement essence of temperature is the measurement of platinum resistance resistance.The method measuring resistance of AD conversion, its deficiency is: the one, power consumption is big, and the 2nd, be unfavorable for low power operation.And comparative method for measuring is a relation of utilizing electric capacity to be directly proportional with resistance the discharge time by resistance, measure the discharge time of a measuring resistance earlier, measure platinum resistance discharge time again, then platinum resistance and the ratio of the resistance of measuring resistance just are equal to the ratio of discharge time, therefore, its measuring accuracy depends on the measurement with discharge time.Present employed ultrasonic calorimeter, its structure comprises housing, LCDs, inquiry button, wiring board constitutes, on the rear wall of housing, be provided with the sensor patchhole, rear wall inboard at housing is provided with the battery installation cavity, be provided with central processing unit in the circuit board, the temperature measuring resistors capacitor charge and discharge circuit, flow measurement shaping pulse analogue signal circuit and corresponding separately chip and heat pulsing circuit, 485 communicating circuits, the infrared communication circuit, two-supply circuit, liquid crystal display circuit, from structure, find out, the measurement of ultrasonic propagation time is separately to be measured by different chips with the measurement that resistance capacitance in the temperature survey discharges and recharges the time in the flow measurement, and ultrasonic propagation time is to measure with counting method or two phase-locked loop method, therefore just has following shortcoming: 1, precision is not high, realize complicated, current drain is big; 2, because the measurement of discharge time is to utilize the timer of single-chip microcomputer inside to measure, be subjected to the restriction of timer figure place and single-chip microcomputer operating rate, so measuring accuracy is not high yet; 3, because flow and temperature for separately measuring, cause the structure complicated of ultrasonic calorimeter.
Summary of the invention
The purpose of this utility model be to provide a kind of simple in structure, volume is little, measuring accuracy is high, only can finish the ultrasonic calorimeter of flow and thermometric afflux amount and the unified measurement of temperature with a chip.
For reaching above purpose, the technical scheme that the utility model adopted is: the unified ultrasonic calorimeter of measuring of this afflux amount and temperature, by housing, cover plate, LCDs, inquiry button, wiring board constitutes, rear wall upside at housing is provided with the sensor jack, rear wall middle part at housing is provided with the battery mounting box, wiring board is installed in the housing, be provided with central processing unit in the circuit board, the temperature measuring resistors capacitor charge and discharge circuit, flow measurement shaping pulse analogue signal circuit, the heat pulsing circuit, 485 communicating circuits, the infrared communication circuit, two-supply circuit and liquid crystal display circuit, the infrared communication circuit, 485 communicating circuits all interconnect with central processing unit, central processing unit and liquid crystal display circuit, the heat pulsing circuit is connected with inquiry button, two-supply circuit is connected with central processing unit, it is characterized in that central processing unit and high precision time interval measurement chip interconnect, the high precision time interval measurement chip interconnects with flow measurement shaping pulse analogue signal circuit and temperature measuring resistors capacitor charge and discharge circuit simultaneously.
The utility model is also implemented by following measure:
Described high precision time interval measurement chip is the high precision time interval measurement chip TDC-GP2 patented product that the German ACAM of employing company produces.
Described temperature measuring resistors capacitor charge and discharge circuit, comprise that phase inverter U20, capacitor C 12, accurate 1K measuring resistance R26 and platinum resistance R25 form, platinum resistance R25 connects 18 pin of high precision time interval measurement chip, its charge and discharge capacitance C12 is a C0.1uF ultra-low-distortion multilayer ceramic capacitor, produce by company of TAIYO YUDAN, phase inverter U20 is NC7S14, has the characteristic of schmidt trigger input and high speed, low-power consumption, and its effect is the beginning and the end of monitoring discharge process.
Described flow measurement shaping pulse analogue signal circuit, comprise commencing signal Start shaping circuit and end signal Stop shaping circuit, three wiring of commencing signal Start shaping circuit connect 5,31,6 pin of high precision time interval measurement chip respectively, and the other end of commencing signal Start shaping circuit connects, downstream transducer; Three wiring of end signal Stop shaping circuit connect 5,6,30 pin of high precision time interval measurement chip respectively.Described duodiode is BAT754C.
Described central processing unit is MSP430F415, is super low-power consumption 16 single-chip microcomputers that TI company produces, and is connected by spi bus with the high precision time interval measurement chip.
Described infrared communication circuit, 485 communicating circuits all are the different modes of data communication, and communications protocol meets GB CJ/T 188-2004 standard code.Described heat pulsing circuit is by the pulse width of setting and the pulse of pulse equivalency evolution of heat correspondence.These all are prior aries, so seldom state.
When using the utility model, need be installed on the ultrasound wave pipeline, the ultrasound wave pipeline is one section and is installed on heat abstractor straight length before, constitute by pipeline, upstream and downstream ultrasonic transducer, reflector plate, as measuring ultrasonic wave flow, this also is a prior art, does not state so do not do more.
Described two-supply circuit is the circuit that battery and civil power all can be powered.Described inquiry button and LCD LCDs can be checked information such as current continuous data, historical continuous data, failure logging by inquiry button and LCD LCDs.
The beneficial effects of the utility model are: compare with the ultrasonic calorimeter of present use owing to measure flow and temperature simultaneously with a chip, so that the structure of ultrasonic heat table is simplified greatly and microminiaturization; Owing to adopt the high precision time interval measurement chip of special-purpose be accurate to picosecond, institute so that the precision and the accuracy of measurement improve greatly; Owing to adopted special chip, make central processing unit simplify program structure, there are more time and resource to be absorbed in numerical evaluation and other functions such as data communication, data storage, strengthened the stability and the reliability of system; Owing to measure for full-electronic, do not have mechanical movable part, so not fragile, long service life.
Description of drawings
Fig. 1 is the utility model structure front-view schematic diagram.
Fig. 2 looks synoptic diagram for the utility model structure left side.
Fig. 3 is the utility model schematic block circuit diagram.
Fig. 4 is the utility model high precision time interval measurement chip circuit principle schematic.
Fig. 5 is the commencing signal Start shaping circuit synoptic diagram of flow measurement shaping circuit of the present utility model.
Fig. 6 is the end signal Stop shaping circuit synoptic diagram of flow measurement shaping circuit of the present utility model.
Fig. 7 is the utility model temperature measuring resistors capacitor charge and discharge circuit synoptic diagram.
Embodiment
Make the utility model with reference to accompanying drawing 1,2,3,4,5,6,7.The unified ultrasonic calorimeter of measuring of this afflux amount and temperature, by housing 1, cover plate 2, LCDs 3, inquiry button 4, wiring board constitutes, rear wall upside at housing 1 is provided with sensor jack 5, rear wall middle part at housing 1 is provided with battery mounting box 15, wiring board is installed in the housing 1, be provided with central processing unit 6 in the circuit board, temperature measuring resistors capacitor charge and discharge circuit 7, flow measurement shaping pulse analogue signal circuit 8, heat pulsing circuit 9,485 communicating circuits 10, infrared communication circuit 11, two-supply circuit 12 and liquid crystal display circuit 13, infrared communication circuit 11,485 communicating circuits 10 all interconnect with central processing unit 6, central processing unit 6 and liquid crystal display circuit 13, heat pulsing circuit 9 is connected with inquiry button 4, two-supply circuit 12 is connected with central processing unit 6, it is characterized in that central processing unit 6 and high precision time interval measurement chip 14 interconnect, high precision time interval measurement chip 14 interconnects with flow measurement shaping pulse analogue signal circuit 8 and temperature measuring resistors capacitor charge and discharge circuit 7 simultaneously.
Described high precision time interval measurement chip 14 is high precision time interval measurement chip TDC-GP2 patented products that the German ACAM of employing company produces, utilize the digital delay line technology to make the measuring accuracy in the time interval bring up to 65 psecs, be specifically designed to ultrasonic propagation time and platinum resistance are carried out high-precision measurement discharge time.
Described temperature measuring resistors capacitor charge and discharge circuit 7, comprise phase inverter U20, capacitor C 12, accurate 1K measuring resistance R26 and platinum resistance R25 form, platinum resistance R25 connects 18 pin of high precision time interval measurement chip 14, room temperature is measured, measure as the time of discharging and recharging that cooperates 14 pairs of platinum resistance of high precision time interval measurement chip by temperature measuring resistors capacitor charge and discharge circuit 7, its charge and discharge capacitance C12 is a C0.1uF ultra-low-distortion multilayer ceramic capacitor, produce by company of TAIYO YUDAN, for measurement provides reliable and stable electric capacity, the beginning and the end of phase inverter U20 monitoring discharge process.
Described flow measurement shaping pulse analogue signal circuit 8, comprise commencing signal Start shaping circuit and end signal Stop shaping circuit, three wiring of commencing signal Start shaping circuit connect 5,31,6 pin of high precision time interval measurement chip 14 respectively, and the other end of commencing signal Start shaping circuit connects upper and lower transducer; Three wiring of end signal Stop shaping circuit connect 5,6,30 pin of high precision time interval measurement chip 14 respectively.By flow measurement shaping pulse analogue signal circuit 8, measure as the flow that cooperates current in 14 pairs of ultrasound wave pipelines of high precision time interval measurement chip.Shaping pulse, its task are to provide needed Start commencing signal of time measurement and Stop end signal for high precision time interval measurement chip 14.Send the driving pulse of ultrasonic transducer when high precision time interval measurement chip 14 after, duodiode D1 holds the Start of this signal time of delivery (TOD) measuring unit immediately, to start with signal.After echo arrived, the high speed hysteresis loop comparator LMV7239 adjustable by a threshold value was shaped to pulse with fusiform echo, and the Stop end of time of delivery (TOD) measuring unit is as end signal.Then ultrasound wave promptly is time between Start and the Stop in the ducted travel-time.Can calculate the flow of current in the pipeline by analog switch NLASB3157 handover measurement hyperacoustic following current travel-time and adverse current travel-time.Described duodiode is BAT754C.
Described central processing unit 6 is MSP430F415, is super low-power consumption 16 single-chip microcomputers that TI company produces, and has abundant peripheral hardware and extremely low running current, and can enter different battery saving modes by different operational modes is set, and further reduces power consumption.Central processing unit MSP430F415 is responsible for the operation of whole procedure, and finishes corresponding function in other parts cooperations.It is connected by spi bus with high precision time interval measurement chip 14, flow and temperature survey is configured, and sends measuring command; Measure the end back and the result is read, do further numerical evaluation and processing by spi bus.
Described infrared communication circuit 11,485 communicating circuits 10 all are the different modes of data communication, and communications protocol meets GB CJ/T 188-2004 standard code.Described heat pulsing circuit 9 is by the pulse width of setting and the pulse of pulse equivalency evolution of heat correspondence.These all are prior aries, so seldom state.
Claims (3)
1, the unified ultrasonic calorimeter of measuring of a kind of afflux amount and temperature, by housing (1), cover plate (2), LCDs (3), inquiry button (4), wiring board constitutes, rear wall upside at housing (1) is provided with sensor jack (5), rear wall middle part at housing (1) is provided with battery mounting box (15), wiring board is installed in the housing (1), be provided with central processing unit (6) in the circuit board, temperature measuring resistors capacitor charge and discharge circuit (7), flow measurement shaping pulse analogue signal circuit (8), heat pulsing circuit (9), 485 communicating circuits (10), infrared communication circuit (11), two-supply circuit (12) and liquid crystal display circuit (13), infrared communication circuit (11), 485 communicating circuits (10) all interconnect with central processing unit (6), central processing unit (6) and liquid crystal display circuit (13), heat pulsing circuit (9) is connected with inquiry button (4), two-supply circuit (12) is connected with central processing unit (6), it is characterized in that being provided with high precision time interval measurement chip (14) at the downside of wiring board, central processing unit (6) interconnects with high precision time interval measurement chip (14), and high precision time interval measurement chip (14) interconnects with flow measurement shaping pulse analogue signal circuit (8) and temperature measuring resistors capacitor charge and discharge circuit (7) simultaneously.
2, the unified ultrasonic calorimeter of measuring of afflux amount according to claim 1 and temperature, it is characterized in that described temperature measuring resistors capacitor charge and discharge circuit (7), comprise that phase inverter U20, capacitor C 12, accurate 1K measuring resistance R26 and platinum resistance R25 form, platinum resistance R25 connects 18 pin of high precision time interval measurement chip (14).
3, the unified ultrasonic calorimeter of measuring of afflux amount according to claim 1 and temperature, it is characterized in that described flow measurement shaping pulse analogue signal circuit (8), comprise commencing signal Start shaping circuit and end signal Stop shaping circuit, three wiring of commencing signal Start shaping circuit connect 5,31,6 pin of high precision time interval measurement chip (14) respectively, and the other end of commencing signal Start shaping circuit connects, downstream transducer; Three wiring of end signal Stop shaping circuit connect 5,6,30 pin of high precision time interval measurement chip (14) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920021197U CN201392255Y (en) | 2009-04-22 | 2009-04-22 | Ultrasonic-wave calorimeter integrating measurement of flow rate and temperature |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200920021197U CN201392255Y (en) | 2009-04-22 | 2009-04-22 | Ultrasonic-wave calorimeter integrating measurement of flow rate and temperature |
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| CN201392255Y true CN201392255Y (en) | 2010-01-27 |
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| CN200920021197U Expired - Fee Related CN201392255Y (en) | 2009-04-22 | 2009-04-22 | Ultrasonic-wave calorimeter integrating measurement of flow rate and temperature |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103674334A (en) * | 2013-12-20 | 2014-03-26 | 山东三龙智能技术有限公司 | Intelligent heat supply metering device and data processing method thereof |
| CN104729764A (en) * | 2015-04-03 | 2015-06-24 | 成都声立德克技术有限公司 | Ultra-small handheld ultrasonic heat flow measuring device |
| CN109903535A (en) * | 2017-12-07 | 2019-06-18 | 辽宁思凯科技股份有限公司 | A kind of narrowband NB-IOT communication module group and its application method for ultrasonic calorimeter |
-
2009
- 2009-04-22 CN CN200920021197U patent/CN201392255Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103674334A (en) * | 2013-12-20 | 2014-03-26 | 山东三龙智能技术有限公司 | Intelligent heat supply metering device and data processing method thereof |
| CN104729764A (en) * | 2015-04-03 | 2015-06-24 | 成都声立德克技术有限公司 | Ultra-small handheld ultrasonic heat flow measuring device |
| CN109903535A (en) * | 2017-12-07 | 2019-06-18 | 辽宁思凯科技股份有限公司 | A kind of narrowband NB-IOT communication module group and its application method for ultrasonic calorimeter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100127 Termination date: 20140422 |