CN204269204U - The simulated testing system of ultrasonic level gage - Google Patents
The simulated testing system of ultrasonic level gage Download PDFInfo
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- CN204269204U CN204269204U CN201420804500.6U CN201420804500U CN204269204U CN 204269204 U CN204269204 U CN 204269204U CN 201420804500 U CN201420804500 U CN 201420804500U CN 204269204 U CN204269204 U CN 204269204U
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- stepper motor
- liquid level
- ultrasonic level
- level gage
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Abstract
The utility model relates to a kind of simulated testing system of ultrasonic level gage, comprise open containers and be suspended at the ultrasonic level gage above vessel port, liquid level analogue means is provided with in described container, the lower end, bottom surface of described container is provided with stepper motor, the motor helical screw mandrel of described stepper motor stretches in container through the bottom surface of container and is fixedly connected with the liquid level analogue means in container, described stepper motor is connected with stepper motor driver, described stepper motor driver is connected with PLC module, and described PLC module is connected with ultrasonic level gage, touch-screen respectively.It is given that native system can realize high-precision liquid level value, low noise, quick position, and do not need to inject actual material.
Description
Technical field
The utility model relates to ultrasonic level gage field, particularly relates to a kind of simulated testing system of ultrasonic level gage.
Background technology
Because ultrasonic level gage emissive power is large, measuring accuracy is high makes it obtain more and more widespread use.The principle of work of ultrasonic material level meter sends high frequency ultrasound wave impulse by transducer (probe) to run into measured medium surface and be reflected back, and part reflection echo, by same receive MUT, converts electric signal to.Ultrasonic pulse is propagated with acoustic velocity, receives ultrasonic pulse required time interval be directly proportional from being transmitted into the distance of transducer to measured medium surface.Relation between this distance value S and velocity of sound C and transmission time T can be formulated: S=C*T/2.In the timing of test ultrasonic liquid level, in order to the liquid level in boost container, the general system adopted transparent vessel water pump water filling and draining, for the container of large volume, water filling and water discharge time longer, the liquid level positioning stablity time is long, causes waste of time, and during powerful water pump operation, noise is very large simultaneously, produce neighbourhood noise, and the actual value of liquid level also out of true, just with visual inspection, accurately can not test out the accuracy of liquid level gauge.Therefore for ultrasonic measuring liquid level principle, be necessary to design a kind of accurate analog container contents liquid level position, and the low noise test macro of quick position position. make not need actual material liquid level also can accurately complete to the test of ultrasonic level gage, and do not produce environmental noise.
Summary of the invention
The utility model is for the deficiencies in the prior art, provide a kind of simulated testing system of ultrasonic level gage, this system can solve with note unwatering system test supersonic liquid level timing noise large effectively, liquid level is long for positioning time, the problems such as level value out of true, make the test of ultrasonic level gage also can realize when not having actual material.
The utility model is the technical scheme solving the problems of the technologies described above employing: a kind of simulated testing system of ultrasonic level gage, comprise open containers and be suspended at the ultrasonic level gage above vessel port, liquid level analogue means is provided with in described container, the lower end, bottom surface of described container is provided with stepper motor, the motor helical screw mandrel of described stepper motor stretches in container through the bottom surface of container and is fixedly connected with the liquid level analogue means in container, described stepper motor is connected with stepper motor driver, described stepper motor driver is connected with PLC module, described PLC module respectively with ultrasonic level gage, touch-screen connects, described touch-screen is used for the command signal of reception to pass to PLC module, described PLC module is for receiving the command signal of touch-screen, export control signal to stepper motor driver, for the duty of control step motor, band working fluid level analogue means moves, described ultrasonic level gage is used for the position signalling of the liquid level analogue means detected to pass to PLC module, described PLC module receives the position signalling of ultrasonic level gage, and be transferred to touch-screen display.
Described stepper motor adopts linear stepping motor.
Described touch-screen adopts model to be the touch-screen of TK6070I.
Described PLC module adopts model to be the PLC of FX3U.
Described liquid level analogue means is a rosette, and this rosette is fixed on the motor helical screw mandrel of stepper motor.
Described rosette is fixed on the motor helical screw mandrel of stepper motor by clamp nut.
The beneficial effect of the utility model employing technique scheme is: the utility model adopts touch-screen to arrange liquid level gauge measurement parameter, according to these parameters, rosette in container is driven to move forward or backwards with PLC Driving Stepping Motor, the rising of simulation liquid level and decline.The ultrasound wave that liquid level gauge is launched runs into rosette back reflection and is received by liquid level gauge, and realization rosette simulates actual liquid level.Meanwhile, PLC is by RS232 interface and liquid level gauge real-time Communication for Power, and liquid level gauge sends the level value recorded to PLC, is transferred to touch-screen shows by PLC.Because the stepping accuracy of stepper motor is very high, the stepping of 0.02 millimeter can be realized.Therefore survey liquid level compared to the system of water filling in container or draining, because stepper motor operation noise is very little, accurate positioning, fast, it is given that native system can realize high-precision liquid level value, low noise, quick position, and do not need to inject actual material.
Accompanying drawing explanation
Fig. 1 is principle schematic of the present utility model;
Fig. 2 is the scheme of installation of stepper motor of the present utility model and rosette;
Fig. 3 is the vertical view of Fig. 2;
Fig. 4 is system flowchart of the present utility model;
Fig. 5 is ultrasonic liquid-level measurement schematic diagram.
In accompanying drawing, 1 is open containers, and 2 is rosette, and 3 is stepper motor, and 31 is motor helical screw mandrel, and 4 is set nut, and 5 is stepper motor driver, and 6 is PLC module, and 7 is ultrasonic level gage, and 8 is touch-screen.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail:
See Fig. 1 to Fig. 5, a kind of embodiment of simulated testing system of ultrasonic level gage 7, comprise open containers 1 and be suspended at the ultrasonic level gage 7 above vessel port, liquid level analogue means is provided with in described container, the lower end, bottom surface of described container is provided with stepper motor 3, the motor helical screw mandrel 31 of described stepper motor 3 stretches in container through the bottom surface of container and is fixedly connected with the liquid level analogue means in container, described stepper motor 3 is connected with stepper motor driver 5, described stepper motor driver 5 is connected with PLC module 6, described PLC module 6 respectively with ultrasonic level gage 7, touch-screen 8 connects, described touch-screen 8 is for passing to PLC module 6 by the command signal of reception, described PLC module 6 is for receiving the command signal of touch-screen 8, export control signal to stepper motor driver 5, for the duty of control step motor 3, band working fluid level analogue means moves, described ultrasonic level gage 7 is for passing to PLC module 6 by the position signalling of the liquid level detected analogue means, described PLC module 6 receives the position signalling of ultrasonic level gage 7, and be transferred to touch-screen 8 and show.
See Fig. 4, adopt said system to realize the system of ultrasonic level gage 7 functional simulation test, comprise the following steps:
First, touch-screen 8 arranges correlation parameter, comprise initial liquid level value, simulated solution place value, range, stepper motor 3 gait of march, and pass to PLC module 6, automatic test is started by touch-screen 8, PLC module 6 compares simulated solution place value and initial liquid level value, the difference of both calculating, determine stepper motor 3 sense of rotation according to difference is positive and negative and outputs to the pulse number of stepper motor 3, stepper motor 3 is advanced according to stepper motor 3 gait of march of setting, after stepper motor 3 is advanced and is put in place, ultrasonic level gage 7 measures the liquid level of liquid level analogue means, PLC module 6 reads the level measurement of ultrasonic level gage 7 by RS232 interface and the simulated solution place value of setting compares, judge the accuracy of measurement drawing liquid level gauge, and be transferred to touch-screen 8 and show.
Described touch-screen 8 is provided with manually, automatic switching button, the switching between manual mode and automatic mode is carried out for control PLC module 6, when PLC module 6 is positioned at manual mode, for manual actuation stepper motor 3 forward or reverse, for arranging the initial liquid level position of liquid level analogue means, when PLC module 6 is positioned at automatic mode, for automatically completing ultrasonic level gage 7 functional simulation test.
The correlation parameter that touch-screen 8 is arranged also comprises the highest level value, distance areas between ultrasound wave transmitting terminal bottom the highest level value and ultrasonic level gage 7 is ultrasonic level gage 7 testing blind zone, and described initial liquid level value, simulated solution place value are all less than the highest level value.Ultrasonic level gage 7 testing blind zone is different according to the difference of the installation site of ultrasonic level gage 7.
Figure 5 shows that ultrasonic wave principle surveys the schematic diagram of liquid level, the principle of work of ultrasonic material level meter sends high frequency ultrasound wave impulse by transducer (probe) to run into measured medium surface and be reflected back, part reflection echo, by same receive MUT, converts electric signal to.Ultrasonic pulse is propagated with acoustic velocity, receives ultrasonic pulse required time interval be directly proportional from being transmitted into the distance of transducer to measured medium surface.Relation between this distance value S and velocity of sound C and transmission time T can be formulated:
S=C * T/2；
Liquid level H=range-S, range refers to distance L1 at the bottom of (ultrasound wave transmitting terminal) to tank bottom ultrasonic level gage 7.
Distance areas between ultrasound wave transmitting terminal bottom the highest level value and ultrasonic level gage 7 is ultrasonic level gage 7 testing blind zone.Liquid level enters this blind area, and ultrasonic level gage 7 can not effectively distinguish transmitting and receiving signal, and measurement result can be caused abnormal.
The utility model adopts touch-screen 8 to arrange liquid level gauge measurement parameter, according to these parameters, drives rosette 2 in container to move forward or backwards with PLC Driving Stepping Motor 3, the rising of simulation liquid level and decline.The ultrasound wave that liquid level gauge is launched runs into rosette 2 back reflection and is received by liquid level gauge, and realization rosette 2 simulates actual liquid level.Meanwhile, PLC is by RS232 interface and liquid level gauge real-time Communication for Power, and liquid level gauge sends the level value recorded to PLC, is transferred to touch-screen 8 shows by PLC.Because the stepping accuracy of stepper motor 3 is very high, the stepping of 0.02 millimeter can be realized.Therefore survey liquid level compared to the system of water filling in container or draining, it is given that native system can realize high-precision liquid level value, low noise, quick position, and do not need to inject actual material.
Touch-screen 8 is mainly used to parameters, and as range, testing blind zone, simulated solution place value, gait of march etc., liquid level gauge measurement result also shows on touch-screen 8 simultaneously; The simulated solution place value arranged according to touch-screen 8 and range, PLC calculates put in place position and initial position distance automatically, initially being initially the general control step motor 3 manually in position arrives at the bottom of tank, then " initial position button is set " on touch-screen 8 is pressed, namely liquid level is the position of 0, namely thinks at the bottom of tank to be initial position.And pulsed drive stepper motor 3 forward or reverse sending corresponding number arrives desired location. and after arriving setting value, read the measured value of liquid level gauge, be transferred to touch-screen 8 and show.
In the present embodiment, touch-screen 8 selects the TK6070I of Wei Luntong company, and PLC selects Mitsubishi FX3U, and this PLC has multi-channel high frequency pulse and exports, Driving Stepping Motor 3, and has direction control command, conveniently automatically controls.The linear stepping motor 3 of Hayden selected by stepper motor 3.See Fig. 2, set correlation parameter by touch-screen 8, such as level value, simulation liquid level (rosette 2) gait of march, range value, blind area value etc.PLC calculates setting level value and initial position distance after obtaining above-mentioned value; according to the setting of stepper motor driver 5 stepping angle; stepping angle is arranged on stepper motor driver 5; the various combination mode being arranged switch by stepping on driver arranges different step values; thus calculating needs the position pulse number sending to stepper motor driver 5; if setting liquid level is greater than metal current disk 2 physical location, so stepper motor 3 rotates forward; If be less than desired location, stepper motor 3 reverses.The gait of march of rosette 2 is determined by the parameters of touch-screen 8.But can not more than 0.2m/S, otherwise stepper motor 3 step-out will be caused.And PLC will judge that the blind area numerical value of touch-screen 8 is arranged, blind area value is arranged by touch-screen 8 and is transferred to PLC, think when arriving " the highest liquid level " shown in Fig. 1 above position by desired location value requirement rosette 2 and enter blind area, rosette 2 position is avoided to exceed the blind zone position of setting, otherwise ultrasonic level gage 7 can not effectively distinguish transmitting and receiving signal, cause measurement result abnormal.After the rosette 2 of simulation material liquid level arrives desired location, PLC reads level value measured by liquid level gauge by RS232 serial port, and pinpoint desired location value compares, and can draw the accuracy of measurement of liquid level gauge.And these results are shown on touch-screen 8.Touch-screen 8 has manually and automatic button simultaneously, complete above-mentioned parameter under automatic condition and automatically measure, can manual actuation stepper motor 3 forward or reverse time manual, to arrange initial position value.Due to stepper motor 3, to run noise very little, accurate positioning, and fast, therefore native system compares note draining test ultrasonic level gage 7 system, and functional and low noise aspect improves a lot.
Native system is specially for the simulated testing system of ultrasonic level gage 7, being applicable to when not having actual liquid or solid material, simulating liquid or solid liquid level to be measured, the functional characteristic of test ultrasonic level gage 7.
Claims (6)
1. the simulated testing system of a ultrasonic level gage, it is characterized in that: comprise open containers and be suspended at the ultrasonic level gage above vessel port, liquid level analogue means is provided with in described container, the lower end, bottom surface of described container is provided with stepper motor, the motor helical screw mandrel of described stepper motor stretches in container through the bottom surface of container and is fixedly connected with the liquid level analogue means in container, described stepper motor is connected with stepper motor driver, described stepper motor driver is connected with PLC module, described PLC module respectively with ultrasonic level gage, touch-screen connects, described touch-screen is used for the command signal of reception to pass to PLC module, described PLC module is for receiving the command signal of touch-screen, export control signal to stepper motor driver, for the duty of control step motor, band working fluid level analogue means moves, described ultrasonic level gage is used for the position signalling of the liquid level analogue means detected to pass to PLC module, described PLC module receives the position signalling of ultrasonic level gage, and be transferred to touch-screen display.
2. the simulated testing system of ultrasonic level gage according to claim 1, is characterized in that: described stepper motor adopts linear stepping motor.
3. the simulated testing system of ultrasonic level gage according to claim 1, is characterized in that: described touch-screen adopts model to be the touch-screen of TK6070I.
4. the simulated testing system of ultrasonic level gage according to claim 1, is characterized in that: described PLC module adopts model to be the PLC of FX3U.
5. the simulated testing system of ultrasonic level gage according to claim 1, is characterized in that: described liquid level analogue means is a rosette, and this rosette is fixed on the motor helical screw mandrel of stepper motor.
6. the simulated testing system of ultrasonic level gage according to claim 5, is characterized in that: described rosette is fixed on the motor helical screw mandrel of stepper motor by clamp nut.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420804500.6U CN204269204U (en) | 2014-12-18 | 2014-12-18 | The simulated testing system of ultrasonic level gage |
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| CN201420804500.6U CN204269204U (en) | 2014-12-18 | 2014-12-18 | The simulated testing system of ultrasonic level gage |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106679774A (en) * | 2017-03-05 | 2017-05-17 | 浙江省计量科学研究院 | Ultrasonic open-channel flowmeter liquid level error on-site detection apparatus and method |
| CN109489774A (en) * | 2018-11-13 | 2019-03-19 | 洛阳理工学院 | A kind of magnetic double level gauge Fast simulation display alternative |
| FR3096131A1 (en) * | 2019-05-17 | 2020-11-20 | Cetenis | WATER HEIGHT SIMULATION DEVICE AND PROCEDURE FOR VERIFYING THE WATER HEIGHT MEASUREMENT OF MEASURING EQUIPMENT BY THIS DEVICE |
-
2014
- 2014-12-18 CN CN201420804500.6U patent/CN204269204U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106679774A (en) * | 2017-03-05 | 2017-05-17 | 浙江省计量科学研究院 | Ultrasonic open-channel flowmeter liquid level error on-site detection apparatus and method |
| CN109489774A (en) * | 2018-11-13 | 2019-03-19 | 洛阳理工学院 | A kind of magnetic double level gauge Fast simulation display alternative |
| CN109489774B (en) * | 2018-11-13 | 2023-11-03 | 洛阳理工学院 | Quick analog display replacing device for magnetic flap level gauge |
| FR3096131A1 (en) * | 2019-05-17 | 2020-11-20 | Cetenis | WATER HEIGHT SIMULATION DEVICE AND PROCEDURE FOR VERIFYING THE WATER HEIGHT MEASUREMENT OF MEASURING EQUIPMENT BY THIS DEVICE |
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