CN205246149U - Ultrasonic wave hotlist - Google Patents

Abstract

The utility model discloses an ultrasonic wave hotlist, including a central processing unit, time quantum, power and monitored control system, display element and transceiver, a central processing unit is connected with time quantum, power and monitored control system, display element and transceiver respectively, the time quantum still is connected with temperature measurement unit and 2 ultrasonic transducer, and the temperature measurement unit is 2 or 4 temperature sensor, the transceiver includes mbus transceiver and irDA transceiver, and mbus transceiver and irDA transceiver are connected with a central processing unit respectively, power and monitored control system respectively with time quantum and central processing unit unit connection, the utility model discloses can realize automatic measuring flow and temperature, the practicality is strong, convenient to use is and measurement accuracy is high.

Description

A kind of ultrasonic wave hotlist

Technical field

The utility model relates to fluid flow and temperature measuring equipment, is specifically related to a kind of ultrasonic wave hotlist.

Background technology

Tradition flowmeter or heat energy meter mechanical vane type or the rotary wind types etc. of adopting, just become with flow according to the number of turns of rotating moreRatio, calculator passes through to gather the number of turns calculated flow rate of wheel rotation, because the rotation of impeller exists mechanical wear, therefore traditional machineThere is the defects such as service life is short in tool formula flowmeter or heat energy meter; Especially because can causing certainty of measurement, the reasons such as damage in impeller fallLow, in addition, because fluid exists in the situation that contains impurity, therefore mechanical flowmeter or heat energy meter usually can be stopped upHave a strong impact on, bring loss to user; When measuring flow or heat energy, can only separately measure, also there is no at present a kind of energyThe instrument of enough measuring flows simultaneously and heat.

Utility model content

The utility model provides a kind of ultrasonic wave hotlist that can simultaneously measure fluid flow and heat.

The technical solution adopted in the utility model is: a kind of ultrasonic wave hotlist, comprise CPU, time quantum,Power supply and monitoring system, display unit and transceiver; Described CPU with time quantum, power supply and monitoring is respectivelySystem, display unit and transceiver are connected; Described time quantum is also connected with respectively temperature measurement unit and 2 ultrasonic wave transducersDevice, described temperature measurement unit is 2 or 4 temperature sensors; Described transceiver comprises Mbus transceiver and IrDA transceiver,Mbus transceiver and IrDA transceiver, be connected with CPU respectively; Described power supply and monitoring system are single with the time respectivelyUnit is connected with central processor unit.

Further, described central processor unit is MSP430F8448 chip; Described time quantum is to survey the GP22 timeAmount chip.

Further, described temperature sensor is PT1000 type temperature sensor or PT500 type temperature sensor.

Further, described power supply and monitoring system are connected with high power lithium battery.

Further, described power supply and monitoring system are provided with transformer, and the voltage that high power lithium battery can be provided turnsBe changed to the needed voltage of GP22 and central processing unit.

Further, described central processing unit is also connected with data storage cell.

Further, described time measurement chip is provided with the system clock that frequency is 32768Hz.

Further, described time measurement chip is provided with the pulse technique clock that frequency is 4MHz.

Further, described CPU is connected with time quantum by eUSCI_B0 interface; Described central authorities processUnit is connected with MBUS transceiver by eUSCI_A0 interface; Described CPU is received by eUSCI_A1 interface and IrDAHair device connects.

Further, described CPU is connected with data storage cell by eUSCI_B1 interface.

The beneficial effects of the utility model are:

(1) the utility model is by GP22 being set as headend equipment, automatable measuring flow and temperature;

(2) the utility model arranges two kinds of transceivers, and person easy to use uses different data acquisition schemes;

(3) the utility model is practical, easy to use, and certainty of measurement is high.

Brief description of the drawings

Fig. 1 is the utility model structure connection diagram.

Fig. 2 is the utility model flow measurement principle schematic.

Fig. 3 is the oscillograph sectional drawing of the utility model temperature survey charge and discharge cycles.

Detailed description of the invention

Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.

As shown in Figure 1, a kind of ultrasonic wave hotlist, comprises CPU, time quantum, power supply and monitoring system, aobviousShow unit and transceiver; Described CPU respectively with time quantum, power supply and monitoring system, display unit and transceiverConnect; Described time quantum is also connected with temperature measurement unit and 2 ultrasonic transducers, and temperature measurement unit is 2 or 4Temperature sensor; Described transceiver comprises Mbus transceiver and IrDA transceiver, Mbus transceiver and IrDA transceiver respectively withCPU connects; Described power supply and monitoring system are connected with time quantum and central processor unit respectively; Two superAcoustic wave transducer is connected to two ports of time quantum, and two ultrasonic transducers are as accepting or transmitting terminal, by surveyingMeasure the time difference through two ultrasonic transducers, the flow velocity of Fluid Computation, and then calculated flow rate, concrete computational process is as follows:

Described central processor unit is MSP430F8448 chip; Described time quantum is GP22 time measurement chip; SurveyAs shown in Figure 2, GP22 can alternate emission goes out two-way and drives the pulse of transducer to amount principle, then measures this pulse via liquidThe time t of the medium of body from ultrasonic transducer a to b_up, then oppositely measure the time t from b to a_down, establish flowing of fluidSpeed is v, and the path of measuring pipeline section is L, and the velocity of sound in liquid is C₀, α be line between ultrasonic transducer a and b withAngle between water (flow) direction;

$t_{up}=\frac{L}{c_0+v*cos\∝}$

$t_{down}=\frac{L}{c_0-v*cos\∝}$

Measurement result will send to CPU and process, t_upAnd t_downBetween time difference computational methods asUnder:

$\mathrm{\Δ}t=t_{down}-t_{up}=\frac{2*L*v*cos\∝}{{c_0}^2-v^2*{\cos }^2\∝}\≈\frac{2*L*cos\∝}{c_0^2}*v$

$v\≈\frac{\mathrm{\Δ}t*{c_0}^2}{2*L*\cos \∝}.$

Because resistance value and the temperature of temperature sensor have direct relation, GP22 directly measures the electricity of temperature sensor RTDHinder variable quantity, measure the temperature contrast of fluid between water inlet and delivery port.

Further, described temperature sensor is PT1000 type temperature sensor or PT500 type temperature sensor; Temperature passesSensor measuring resistance and reference temperature steady resistance will discharge and recharge same electric capacity respectively, can lead to discharge time soCross the measuring unit of GP22 inside and accurately measure, Fig. 3 is a thermometric typical charging and discharging curve.

Further, described power supply and monitoring system are connected with high power lithium battery.

Further, described power supply and monitoring system are provided with transformer, and the voltage that high power lithium battery can be provided turnsBe changed to the needed voltage of GP22 and central processing unit; General central processing unit and GP22 need 3V voltage.

Further, described central processing unit is also connected with data storage cell; Can be by one by data storage cellThe measurement result of section in the time stores, and is convenient to the later stage inquire about.

Further, described time measurement chip is provided with the system clock that frequency is 32768Hz.

Further, described time measurement chip is provided with the pulse technique clock that frequency is 4MHz.

Further, described CPU is connected with time quantum by eUSCI_B0 interface; Described central authorities processUnit is connected with MBUS transceiver by eUSCI_A0 interface; Described CPU is received by eUSCI_A1 interface and IrDAHair device connects.

Further, described CPU is connected with data storage cell by eUSCI_B1 interface.

The utility model can be realized the automatic measurement of flow and the automatic measurement of temperature, and heat can pass through flow velocity and streamPoor the calculating of fluid temperature (F.T.) entering and flow out; By GP22 time measurement chip is set, Measuring Time accurately, and thenObtain accurate flow and temperature.

The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all at thisAny amendment of doing within the spirit of utility model and principle, be equal to and replace and improvement etc., all should be included in the utility modelProtection domain within.

Claims (10)

1. a ultrasonic wave hotlist, comprises CPU, time quantum, power supply and monitoring system, display unit and transmitting-receivingDevice; Described CPU is connected with time quantum, power supply and monitoring system, display unit and transceiver respectively; Its featureBe: described time quantum is also connected with temperature measurement unit and 2 ultrasonic transducers, temperature measurement unit is 2 or 4Temperature sensor; Described transceiver comprises Mbus transceiver and IrDA transceiver, Mbus transceiver and IrDA transceiver respectively withCPU connects; Described power supply and monitoring system are connected with time quantum and central processor unit respectively.

2. a kind of ultrasonic wave hotlist according to claim 1, is characterized in that: described central processor unit isMSP430F8448 chip; Described time quantum is GP22 time measurement chip.

3. a kind of ultrasonic wave hotlist according to claim 1, is characterized in that: described temperature sensor is PT1000 type temperatureDegree sensor or PT500 type temperature sensor.

4. a kind of ultrasonic wave hotlist according to claim 1, is characterized in that: described power supply and monitoring system are connected with heightCan lithium battery.

5. a kind of ultrasonic wave hotlist according to claim 4, is characterized in that: described power supply and monitoring system are provided with changeDepressor, the voltage transitions that high power lithium battery can be provided is GP22 and the needed voltage of central processing unit.

6. a kind of ultrasonic wave hotlist according to claim 1, is characterized in that: described central processing unit is also connected with dataMemory cell.

7. a kind of ultrasonic wave hotlist according to claim 1, is characterized in that: described time measurement chip is provided with frequencyFor the system clock of 32768Hz.

8. a kind of ultrasonic wave hotlist according to claim 1, is characterized in that: described time measurement chip is provided with frequencyFor the pulse technique clock of 4MHz.

9. a kind of ultrasonic wave hotlist according to claim 1, is characterized in that: described CPU is passed through eUSCI_B0 interface is connected with time quantum; Described CPU is connected with MBUS transceiver by eUSCI_A0 interface; In describedCentral Processing Unit is connected with IrDA transceiver by eUSCI_A1 interface.

10. a kind of ultrasonic wave hotlist according to claim 6, is characterized in that: described CPU is passed throughEUSCI_B1 interface is connected with data storage cell.