CN220136469U - Ultrasonic open channel flowmeter calibrating device based on range sensor - Google Patents
Ultrasonic open channel flowmeter calibrating device based on range sensor Download PDFInfo
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- CN220136469U CN220136469U CN202321383189.8U CN202321383189U CN220136469U CN 220136469 U CN220136469 U CN 220136469U CN 202321383189 U CN202321383189 U CN 202321383189U CN 220136469 U CN220136469 U CN 220136469U
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Abstract
The utility model discloses an ultrasonic open channel flowmeter calibrating device based on a ranging sensor, which relates to the technical field of open channel weir trough flowmeter calibrating equipment, wherein a penetrating type stepping motor, a first ranging sensor and a reflecting flat plate are arranged on a lifting platform, the power output end of the penetrating type stepping motor is in threaded connection with a screw rod, the penetrating type stepping motor is used for driving the lifting platform to lift along the screw rod, the lifting platform is connected with a throat width measuring structure, a rotation driving structure drives a second ranging sensor to rotate, a calibration auxiliary module is respectively and electrically connected with the penetrating type stepping motor and the rotation driving structure, and a power supply is respectively and electrically connected with the penetrating type stepping motor, the rotation driving structure, the first ranging sensor, the second ranging sensor and the calibration auxiliary module. The ultrasonic open channel flowmeter calibrating device based on the distance measuring sensor solves the problems of low field calibrating working efficiency and poor result accuracy of the ultrasonic open channel flowmeter.
Description
Technical Field
The utility model relates to the technical field of open channel weir trough flowmeter calibrating equipment, in particular to an ultrasonic open channel flowmeter calibrating device based on a ranging sensor.
Background
The open channel weir trough flowmeter is widely used and is mainly used in the fields of reservoirs, rivers, hydraulic engineering, sewage treatment, farmland irrigation, water resource treatment and the like. The ultrasonic open channel flowmeter (composed of ultrasonic liquid level meter for measuring liquid level and flow calculating transducer, and can be divided into integral type and split type according to different structures, and is applicable to measuring rectangular, trapezoidal and U-shaped open channel flow of reservoirs, rivers, hydraulic engineering, urban water supply, sewage treatment, farm irrigation and water administration water resource, etc.), by installing standard water measuring weir groove in open channel, setting ultrasonic liquid level meter (the instrument for measuring water level by measuring propagation time by utilizing reflection of ultrasonic wave when encountering medium interfaces with different densities) at defined position, measuring water level flowing through weir groove, and bringing water level value into defined flow formula or empirical formula to calculate liquid flow. In the state of liquid free flow, the relationship between the liquid flow Q passing through the weir groove and the liquid level H is as follows:
Q=C×H×n
wherein: c is the flow coefficient; h is the equivalent liquid level height, and the unit is m; n is a constant related to the weir groove.
Because the ultrasonic open channel flowmeter adopts a non-contact mode, the influence of factors such as temperature, pressure, viscosity and density of the measured fluid can be effectively avoided, and meanwhile, the ultrasonic has the characteristics of high frequency, short wavelength, small diffraction, good directivity, small attenuation, large transmittance and the like, has the characteristic of remarkable reflection when encountering impurities or interfaces, can effectively improve the accuracy of flow measurement, and is a flow measuring device with wider application.
The metering data of the ultrasonic open channel flowmeter is the key of trade settlement, environment monitoring and production management, and the design of a more scientific, accurate, practical and efficient open channel flowmeter detection (calibration) device has extremely important significance in ensuring the accuracy of the metering data.
Because of the particularity of the installation process, the open channel weir trough flowmeter is poured at the use point once the installation is completed, the open channel weir trough flowmeter cannot be disassembled for inspection, and the use of the standby flowmeter for inspection also has a certain influence on the normal production activity of enterprises. Thus, current verification/calibration methods for open channel weir trough flowmeters are typically in-situ. Guangzhou energy detection institute Chen Hansong and the like propose an ultrasonic open channel flowmeter calibrating device which has the characteristics of semi-automatic measurement, automatic data recording and original record generation and adopts a water level simulation calibrating platform to carry out liquid level measurement.
The utility model relates to a portable ultrasonic open channel flowmeter calibrating device invented by Guangzhou energy detection institute Chen Hansong and the like, which comprises a water level simulation calibrating platform, a control module, a tablet personal computer module and an appearance calibrating tool module. And measuring and calibrating the appearance of the open channel weir groove by using an appearance calibration tool module, setting basic information by using a tablet computer module, and outputting a detection control instruction to a control module. The control module drives the servo motor to simulate 5 liquid level measuring points, then calculates corresponding liquid flow according to the simulated liquid level height value and relevant constant of the weir groove, compares the calculated value with an indication value of the ultrasonic liquid flow meter, and finally realizes the calibration of the on-site ultrasonic open channel flow meter. The disadvantages are mainly: 1. the measuring of the relevant constant n of the weir groove uses tools such as a steel ruler, a dipstick, an angle gauge and the like, has the advantages of complex measuring flow, long time consumption, low accuracy of measured data and great uncertainty. 2. The simulation platform lifting mechanism is a guide rail type stepping motor, is large in size, and is inconvenient to put into an installation position in a weir groove calibration installation site. 3. The simulation liquid level platform is externally powered, and the whole device is not portable enough.
Disclosure of Invention
The utility model aims to provide an ultrasonic open channel flowmeter calibrating device based on a ranging sensor, which solves the problems of low on-site calibrating work efficiency and poor result accuracy of an ultrasonic open channel flowmeter.
In order to achieve the above object, the present utility model provides the following solutions:
the utility model provides an ultrasonic open channel flowmeter calibrating device based on a distance measuring sensor, which comprises a screw rod, a liquid level simulation platform, a calibrating auxiliary module, a power supply and a throat width measuring structure, wherein the liquid level simulation platform comprises a lifting platform, a penetrating type stepping motor, a first distance measuring sensor and a reflecting flat plate, the penetrating type stepping motor, the first distance measuring sensor and the reflecting flat plate are all arranged on the lifting platform, the power output end of the penetrating type stepping motor is in threaded connection with the screw rod, the penetrating type stepping motor is used for driving the lifting platform to lift along the screw rod, the lifting platform is connected with the throat width measuring structure, the throat width measuring structure comprises a rotating driving structure and a second distance measuring sensor, the rotating driving structure drives the second distance measuring sensor to rotate, the calibrating auxiliary module is respectively and electrically connected with the penetrating type stepping motor, the rotating driving structure, the first distance measuring sensor and the calibrating auxiliary module, and the rotating driving structure.
Preferably, the calibration assistance module and the power supply are both disposed on the lifting platform.
Preferably, the calibration auxiliary module comprises a single chip microcomputer, a motor driving module, a wireless communication module and a display operation module, wherein the single chip microcomputer is respectively and electrically connected with the motor driving module, the first ranging sensor, the second ranging sensor, the wireless communication module and the display operation module, and the motor driving module is respectively and electrically connected with the through stepping motor and the rotation driving structure.
Preferably, the throat width measurement structure further comprises a sensor box, the rotation driving structure and the second ranging sensor are both located in the sensor box, and an opening is formed in a position, corresponding to the second ranging sensor, of the sensor box.
Preferably, a mounting bracket is arranged at the power output end of the rotation driving structure, and the second distance measuring sensor is arranged on the mounting bracket.
Preferably, the rotation driving structure is a gear motor, and a power output end of the gear motor is in transmission connection with the mounting bracket through a coupler.
Preferably, the lifting platform is connected to the sensor box by an extension rod, which is detachably connected to the lifting platform and the sensor box, respectively.
Preferably, aviation plugs are respectively arranged at two ends of the extension rod, and the two aviation plugs are electrically connected.
Preferably, the device further comprises a base, wherein the lower end of the screw rod is connected with the base, a horizontal adjusting screw is arranged on the base, and the levelness of the base is adjusted through the horizontal adjusting screw.
Compared with the prior art, the utility model has the following technical effects:
the lifting platform is provided with the first distance measuring sensor, so that the vertical simulation height has a measurement standard. The utility model uses the screw rod and the penetrating type stepping motor, the screw rod is fixed, no guide rail exists, the penetrating type stepping motor drives the lifting platform to move up and down, the volume of the device is further reduced, and the calibration of the No. 1, no. 2 and No. 3 groove types is facilitated. According to the utility model, the second distance measuring sensor and the rotation driving structure are used for measuring the throat width, and the second distance measuring sensor and the rotation driving structure are combined with the calibration auxiliary module to be used for calculating the throat width, so that the measuring flow is simplified, the calibration activity time is shortened, the accuracy of measured data is improved, and the uncertainty is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is an isometric view of a distance sensor-based ultrasonic open channel flow meter calibration device of the present utility model;
FIG. 2 is a front view of the ultrasonic open channel flow meter calibration device based on the distance measuring sensor of the present utility model;
FIG. 3 is a schematic view of a screw, a through stepper motor and a base of the present utility model;
FIG. 4 is a schematic view of a rotary drive structure, mounting bracket and second distance measuring sensor according to the present utility model;
FIG. 5 is a schematic view of an extension rod of the present utility model;
FIG. 6 is a schematic view of a lead screw according to the present utility model;
FIG. 7 is a schematic view of a reflector plate of the present utility model;
FIG. 8 is a schematic diagram of the calibration flow of the ultrasonic open channel flow meter calibration device based on the distance measurement sensor of the present utility model;
wherein: the device comprises a 1-screw rod, a 2-lifting platform, a 3-penetrating stepping motor, a 4-first distance measuring sensor, a 5-rotation driving structure, a 6-second distance measuring sensor, a 7-sensor box, an 8-mounting bracket, a 9-coupler, a 10-extension rod, an 11-aviation plug, a 12-base, a 13-horizontal adjusting screw, a 14-groove, a 15-reflection flat plate and a 16-bulge.
Description of the embodiments
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by a person skilled in the art based on the embodiments of the utility model without any inventive effort, are intended to fall within the scope of the utility model.
The utility model aims to provide an ultrasonic open channel flowmeter calibrating device based on a ranging sensor, which solves the problems of low on-site calibrating work efficiency and poor result accuracy of an ultrasonic open channel flowmeter.
In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description.
As shown in fig. 1 to 6: the embodiment provides an ultrasonic open channel flowmeter calibrating device based on range sensor, including lead screw 1 (the stroke is not less than 600 mm), liquid level simulation platform, calibration auxiliary module, power and throat width measurement structure, lead screw 1 is the draw-in groove lead screw, open a recess 14 approximately 1.5mm wide, 2mm dark on ordinary lead screw promptly, liquid level simulation platform includes lift platform 2, run-through step motor 3, first range sensor 4 and reflection flat board 15 (surface 1 level precision), run-through step motor 3 sets up in lift platform 2, reflection flat board 15 sets up at lift platform 2 upper surface, the through-hole has been seted up to reflection flat board 15 and lift platform 2 and lead screw 1's corresponding position, so that lead screw 1 passes, and reflection flat board 15 and lift platform 2 and lead screw 1's recess 14 correspond the position and be provided with 1.2mm wide, 1.5mm long arch 16, arch 16 is arranged in recess 14, first range sensor 4 is arranged in lift platform 2's side and sets up perpendicularly downwards, be used for measuring reflection flat board 15's vertical height, run-through step motor 3's power output and lift platform 2 and lift platform 2 width measurement drive structure 5 rotation sensor 5, the drive structure is rotated to the throat and is rotated to the structure is including second range sensor 6. The penetrating stepper motor 3 drives the reflecting flat plate 15, the lifting platform 2 and the throat width measuring structure to synchronously move up and down along the axial direction of the screw rod, and the groove 14 plays a guiding role in the moving process. The penetrating stepper motor 3 accurately controls the vertical movement distance of the reflecting flat plate 15 according to the lifting height, and realizes the simulation of different liquid level heights so as to meet the traceability requirement of the ultrasonic open channel flowmeter value. The screw rod 1, the liquid level simulation platform and the throat width measurement structure form a measurement and control platform.
The calibration auxiliary module is respectively connected with the through type stepping motor 3 and the rotation driving structure 5, the power supply is a storage battery and used for 9-24V power supply, the power supply is respectively connected with the through type stepping motor 3, the rotation driving structure 5, the first ranging sensor 4, the second ranging sensor 6 and the calibration auxiliary module through the power supply module, the power supply module is arranged in the lifting platform 2, and the power supply is arranged outside the lifting platform 2.
Specifically, in this embodiment, the calibration auxiliary module is disposed in the lifting platform 2, the calibration auxiliary module includes a single-chip microcomputer, a motor driving module, a wireless communication module and a display operation module, the single-chip microcomputer is built in with a calibration auxiliary program, the single-chip microcomputer is respectively electrically connected with the motor driving module, the first ranging sensor 4, the second ranging sensor 6, the wireless communication module and the display operation module, the motor driving module is respectively electrically connected with the through stepping motor 3 and the rotation driving structure 5, the motor driving module is used for driving the through stepping motor 3 and the rotation driving structure 5 to rotate positively and negatively, the display operation module is used for setting calibration parameters, controlling the calibration process, displaying calibration process data and result data, the data measured by the first ranging sensor 4 and the second ranging sensor 6 are calculated according to calibration rules and calibration standards by the calibration auxiliary program built in the single-chip microcomputer, the calibration data can be uploaded to the cloud platform through the wireless communication module, or the single-chip microcomputer and external equipment can be in a wired connection mode to realize communication, and transmit the calibration data.
In this embodiment, throat width measurement structure still includes sensor box 7, and rotation drive structure 5 and second range finding sensor 6 all are located sensor box 7, and rotation drive structure 5 is gear motor, and gear motor's power take off end passes through shaft coupling 9 transmission with installing support 8 and is connected, and installing support 8 is L type support, and second range finding sensor 6 sets up on installing support 8, and sensor box 7 is provided with the opening with the position that second range finding sensor 6 corresponds. The second distance measuring sensor 6 arranged on the mounting bracket 8 is driven to rotate by the gear motor through the coupler 9, so that the measurement of the minimum throat width (the vertical distance at two sides of the minimum cross section of the narrow section in the measuring groove) of the measured object is realized.
In this embodiment, the lifting platform 2 is connected to the sensor box 7 via an extension rod 10, and the extension rod 10 is detachably connected to the lifting platform 2 and the sensor box 7 via screws, respectively. The both ends of extension rod 10 are provided with aviation plug 11 respectively, and two aviation plug 11 electricity are connected, and aviation plug 11 of one end is used for connecting rotation drive structure 5, second range sensor 6 in the sensor box 7, and aviation plug 11 of the other end is used for connecting singlechip and drive module.
The embodiment further comprises a base 12, the lower end of the screw rod 1 is connected with the base 12, horizontal adjusting screws 13 are arranged at four corners of the base 12, and levelness of the base 12 is adjusted through the level gauge and the horizontal adjusting screws 13.
In this embodiment, the first ranging sensor 4 (measurement error is less than or equal to ±1 mm) and the second ranging sensor 6 (measurement error is less than or equal to ±1 mm) are ultrasonic ranging sensors (an apparatus for measuring a short range distance in space by a pulse method, a phase method, or the like, using laser as a carrier wave and diffuse reflection measurement of a target surface as a feature), infrared ranging apparatuses, or 3D scanners, or the like.
According to the ultrasonic open channel flowmeter calibrating device based on the ranging sensor, the second ranging sensor 6 is used for measuring the relevant constant n of the weir groove, so that the purposes of simple measuring flow, short time consumption and high accuracy of measured data are achieved. Meanwhile, the screw rod 1, the lifting platform 2, the reflecting flat plate 15 and the penetrating type stepping motor form a guide rail-free liquid level height simulation platform, the problem that lifting can be achieved only by the guide rail is solved, the size of the device is further reduced, the reflecting flat plate 15 and the first distance measuring sensor 4 are designed on the lifting platform 2, and the problem of tracing standard quantity values is solved. (only the first ranging sensor 4 and the reflecting flat plate 15 need to trace the source when the device traces the source), a singlechip is adopted as a main control device of a control module, and calibration data are uploaded to a cloud platform through a wireless communication module, so that data transmission is realized, and the purpose of portability of the device is achieved.
Calibration flow and steps:
1) Installing an ultrasonic open channel flowmeter calibrating device based on a ranging sensor (without installing an extension rod 10 and a throat width measuring structure) in an anhydrous ultrasonic open channel flowmeter measuring weir groove; the horizontal adjusting screw 13 of the base 12 is adjusted to enable the device to be horizontally placed, the power supply is connected, and the device is started;
2) Initializing parameters of an ultrasonic open channel flowmeter calibrating device based on a ranging sensor, zeroing a calibration value, moving a reflecting flat plate 15 to an initial position, and setting corresponding parameters of the ultrasonic open channel flowmeter to be measured in a calibration auxiliary module;
3) The calibration auxiliary module calculates the height data of the calibration measurement point according to the liquid level range (H) of the ultrasonic open channel flowmeter and the initial height of the ultrasonic open channel flowmeter calibration device based on the ranging sensor, and specifically comprises the following steps:
firstly, equally dividing the liquid level range (H) by 5, wherein the initial stroke of the reflecting flat plate 15 is equal division distance minus the initial height of the reflecting flat plate 15, and the stroke after the initial stroke is equal division liquid level range value;
after the calculation is completed, the singlechip controls the penetrating stepper motor 3 through instructions to enable the reflecting flat plate 15 to move from the lowest point (0 point) to the 1 st calibration point, and the calibration auxiliary module displays the standard liquid level as followsh Label (C) (distance traveled by the reflective plate 15);
4) At this time, the extension rod 10 and the throat width measuring structure are installed, the second ranging sensor 6 is driven to rotate (+ -5 degrees) through the rotation driving structure 5, meanwhile, the throat width is measured, the minimum throat width value is obtained, the minimum throat width value is recorded in the singlechip, and the throat width measuring structure and the extension rod 10 are disassembled after the measurement is completed, and the measurement is continued;
5) Calculating a standard flow value according to a built-in formula of the corresponding groove typeQ Label (C) The method comprises the steps of carrying out a first treatment on the surface of the Simultaneously popup window to prompt user to input liquid level value of ultrasonic open channel secondary instrument to be detectedh Showing the And flow valueQ Showing the The method comprises the steps of carrying out a first treatment on the surface of the Calculating the indicating value error of the liquid level and the flow of the time at the point according to the formula (1) and the formula (2);
∆h=h showing the −h Label (C) (1)
∆Q=（Q Showing the -Q Label (C) ）/Q Label (C) ×100% (2)
In the method, in the process of the utility model,∆his the error of the liquid level indication value;∆Qis the error of flow indication;
6) The penetrating stepper motor 3 is controlled by an instruction to enable the reflecting flat plate 15 to move from the calibration point to the next calibration point, and a detection result of the 1 st time of each calibration point is obtained;
7) The calibration auxiliary module detects that the calibration data of 5 calibration points and the measured data of the instrument are completely stored automatically, prompts whether the next whole detection is started, and after an instruction is obtained, the measurement and control panel is initialized, and the steps 3), 4) and 5) are repeated to obtain second detection results and third detection results of the 1 st to 5 th points respectively, the calibration auxiliary module detects and prompts that the calibration is finished, and the calibrated experimental data (the liquid level, the flow indication error average value and the like of each point) and the original record are uploaded to the cloud database;
9) And initializing parameters of the ultrasonic open channel flowmeter calibrating device based on the ranging sensor, and ending the calibration.
In the embodiment, the second ranging sensor 6 and the rotation driving structure 5 are utilized to measure the throat width, the calibration auxiliary module is combined to calculate the throat width, the measurement flow is simplified, the calibration activity time is shortened, the accuracy of measurement data is improved, and the uncertainty is reduced.
The singlechip of this embodiment is lighter and energy-conserving for the panel computer for calibrating device is more portable, and it is more convenient to detect operation process.
The embodiment uses the lead screw 1 and runs through formula step motor 3, and lead screw 1 is fixed, and runs through formula step motor 3 and drives lift platform 2 and reciprocate, further reduces the device volume, more does benefit to calibration 1, 2, no. 3 cell types.
In this embodiment, the original record generated in the calibration process is stored in the singlechip, and the calibration record can be transferred after the calibration work is completed.
The lifting platform 2 of the present embodiment is provided with a first distance measuring sensor 4 so that the vertical analog height has a measurement standard.
The power module of the embodiment is built in, and the whole device has no external wiring and external equipment, so that the device is more concise and attractive.
The principles and embodiments of the present utility model have been described in this specification with reference to specific examples, the description of which is only for the purpose of aiding in understanding the method of the present utility model and its core ideas; also, it is within the scope of the present utility model to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the utility model.
Claims (9)
1. An ultrasonic open channel flowmeter calibrating device based on range sensor, its characterized in that: including lead screw, liquid level simulation platform, calibration auxiliary module, power and throat width measurement structure, liquid level simulation platform includes lift platform, run-through step motor, first range sensor and reflection flat board, run-through step motor first range sensor with the reflection flat board all sets up on the lift platform, run-through step motor's power take off end with lead screw threaded connection, run-through step motor is used for the drive lift platform is followed the lead screw goes up and down, lift platform with throat width measurement structure connects, throat width measurement structure includes rotation drive structure and second range sensor, rotation drive structure drive second range sensor rotates, calibration auxiliary module respectively with run-through step motor with rotation drive structure electricity is connected, the power respectively with run-through step motor rotation drive structure first range sensor second range sensor with calibration auxiliary module electricity is connected.
2. The ultrasonic open channel flow meter calibration device based on ranging sensors of claim 1, wherein: the calibration auxiliary module and the power supply are both arranged on the lifting platform.
3. The ultrasonic open channel flow meter calibration device based on ranging sensors of claim 1, wherein: the calibration auxiliary module comprises a single chip microcomputer, a motor driving module, a wireless communication module and a display operation module, wherein the single chip microcomputer is respectively and electrically connected with the motor driving module, the first distance measuring sensor, the second distance measuring sensor, the wireless communication module and the display operation module, and the motor driving module is respectively and electrically connected with the penetrating stepping motor and the rotation driving structure.
4. The ultrasonic open channel flow meter calibration device based on ranging sensors of claim 1, wherein: the throat width measurement structure further comprises a sensor box, the rotation driving structure and the second ranging sensor are both located in the sensor box, and an opening is formed in the position, corresponding to the second ranging sensor, of the sensor box.
5. The ultrasonic open channel flow meter calibration device based on ranging sensors of claim 1, wherein: the power output end of the rotation driving structure is provided with a mounting bracket, and the second ranging sensor is arranged on the mounting bracket.
6. The ultrasonic open channel flow meter calibration device based on ranging sensors of claim 5, wherein: the rotary driving structure is a gear motor, and the power output end of the gear motor is in transmission connection with the mounting bracket through a coupler.
7. The ultrasonic open channel flow meter calibration device based on ranging sensors of claim 4, wherein: the lifting platform is connected with the sensor box through an extension rod, and the extension rod is detachably connected with the lifting platform and the sensor box respectively.
8. The ultrasonic distance sensor-based open channel flow meter calibration device of claim 7, wherein: and aviation plugs are respectively arranged at two ends of the extension rod, and the two aviation plugs are electrically connected.
9. The ultrasonic open channel flow meter calibration device based on ranging sensors of claim 1, wherein: the screw rod is characterized by further comprising a base, wherein the lower end of the screw rod is connected with the base, a horizontal adjusting screw is arranged on the base, and the levelness of the base is adjusted through the horizontal adjusting screw.
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