CN210664692U - Calibration system - Google Patents
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- CN210664692U CN210664692U CN201921456164.XU CN201921456164U CN210664692U CN 210664692 U CN210664692 U CN 210664692U CN 201921456164 U CN201921456164 U CN 201921456164U CN 210664692 U CN210664692 U CN 210664692U
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Abstract
The present application relates to a calibration system comprising a container, a flow meter placement, a reference flow meter and a timing controller; the container is connected with the flowmeter placing part; the flowmeter placing part is connected with the reference flowmeter; the flowmeter placing part can be used for placing a flowmeter to be calibrated; the reference flowmeter is connected with the container; the timing controller is connected with the reference flowmeter and can control the first measurement time of the reference flowmeter, the timing controller can determine the starting time of the first pulse of the flowmeter to be calibrated through detection, and determine the ending time according to the starting time and the first measurement time so as to obtain the flow to be calibrated of the flowmeter to be calibrated between the starting time and the ending time. The design can prevent the technical problems that the flowmeter to be calibrated loses pulses in the detection process, the detection time is long, and the detection efficiency is low.
Description
Technical Field
The application relates to the field of flowmeters, in particular to a calibration system.
Background
The liquid flow standard device is used as a device for detecting the precision of a liquid flowmeter and mainly comprises three methods, namely a mass method, a volume method and a standard meter method.
The standard meter method flow rate standard device uses a standard flowmeter (which can be a speed flowmeter, a volume flowmeter, a critical flow flowmeter, a mass flowmeter, a heat meter and the like) as a standard device, enables fluid to continuously pass through the standard flowmeter and a detected flowmeter in the same time interval, compares output flow rate values of the standard flowmeter and the detected flowmeter, and determines the measuring performance of the detected flowmeter.
The standard water flow rate device based on the standard meter method is mature after years of development. But its disadvantages are slowly revealed:
in a flowmeter (particularly a positive displacement flowmeter) for detecting an ultralow frequency pulse output, the flowmeter for detecting an ultralow frequency pulse output is prone to lose pulses during detection, and in order to prevent the loss of pulses during detection, a long detection time is required, resulting in low detection efficiency.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application aims to solve the technical problems that pulse loss is prevented in the detection process, the required detection time is long, and the detection efficiency is low.
In order to solve the above technical problem, an embodiment of the present application discloses a calibration system, which includes a container, a flow meter placement section, a reference flow meter, and a timing controller;
the container is connected with the flowmeter placing part;
the flowmeter placing part is connected with the reference flowmeter; the flowmeter placing part can be used for placing a flowmeter to be calibrated;
the reference flowmeter is connected with the container;
the timing controller is connected with the reference flowmeter and can control the first measurement time of the reference flowmeter, the timing controller can determine the starting time of the first pulse of the flowmeter to be calibrated through detection, and determine the ending time according to the starting time and the first measurement time so as to obtain the flow to be calibrated of the flowmeter to be calibrated between the starting time and the ending time.
Optionally, the timing controller includes a first timing control module and a second timing control module;
the first timing control module comprises a first time setting module capable of controlling a first measurement time of the reference flow meter;
the second timing control module comprises a first pulse detection module and a second time setting module, and the first pulse detection module can detect the pulse of the flowmeter to be calibrated when the first time setting module starts timing; the second time setting module can start timing when the flowmeter to be calibrated is detected to the first pulse and count to a second measurement time, wherein the second measurement time is equal to the first measurement time.
Optionally, the first timing control module includes a second pulse detection module, and the first time setting module is capable of starting timing when the second pulse detection module detects a first pulse of the reference flowmeter.
Optionally, the flow meter placing part includes a first flow meter placing part and a second flow meter placing part, the first flow meter placing part is disposed along a first direction, the second flow meter placing part is disposed along a second direction, and the first direction is perpendicular to the second direction.
Optionally, a first pipeline is connected between the container and the reference flowmeter, one section of the first pipeline is set to be in the first direction, and a disconnected position of the pipeline in the first direction is the first flowmeter placing part;
a second pipeline is connected between the container and the reference flowmeter, one section of the second pipeline is arranged in the second direction, and the disconnected position of the pipeline in the second direction is the second flowmeter placing part.
Optionally, a first regulating valve is arranged on the first pipeline; the second pipeline is provided with a second regulating valve.
Optionally, the system further comprises a power device, a first end of the power device is connected with the container, a second end of the power device is connected with the reference flowmeter, and the power device can provide power for conveying liquid.
Optionally, the system further comprises a voltage stabilizer; the first end of the pressure stabilizer is connected with the container, and the second end of the pressure stabilizer is connected with the flowmeter placing part.
Optionally, the system comprises a reference balance device; the reference balance device is connected with the reference flowmeter; the reference balance device is connected with the container; the flow value measured by the reference balance device can be used as a calibration reference value for the reference flowmeter.
Optionally, the reference balance device is removably connected to the reference flow meter and the container.
By adopting the technical scheme, the embodiment of the application has the following beneficial effects:
the timing controller can determine the starting time of the first pulse of the flowmeter to be calibrated through detection, and determine the ending time according to the starting time and the first measurement time so as to acquire the flow to be calibrated of the flowmeter to be calibrated between the starting time and the ending time. The technical problems that the flow meter to be calibrated loses pulses in the detection process, the detection time is long, and the detection efficiency is low can be solved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a calibration system according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of a calibration system according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a calibration system according to an embodiment of the present application;
FIG. 4 is a schematic diagram of a calibration system according to an embodiment of the present application;
FIG. 5 is a schematic diagram of a calibration system according to an embodiment of the present application;
FIG. 6 is a schematic diagram of a calibration system according to an embodiment of the present application;
FIG. 7 is a schematic diagram of a calibration system according to an embodiment of the present application;
FIG. 8 is a schematic diagram of a calibration system according to an embodiment of the present application;
FIG. 9 is a schematic diagram of a calibration system according to an embodiment of the present application;
the following is a supplementary description of the drawings:
1-a container; 2-a flow meter placement section; 3-a reference flow meter; 4-a timing controller; 41-a first timing control module; 411-a first time setting module; 412-a second pulse detection module; 42-a second timing control module; 421-a second time setting module; 422-a first pulse detection module; 5-a power plant; 6-a voltage stabilizing device; 71-first TP timer; 72-a flowmeter to be calibrated timing module; 73-a pulse output end of the flowmeter to be calibrated; 74-reference flowmeter pulse output; 75-reference flow meter timing module; 76-a second TP timer; 8-reference balance device.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the present application. In the description of the present application, it is to be understood that the terms "upper", "lower", "top", "bottom", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a calibration system according to an embodiment of the present disclosure; the system includes a container 1, a flowmeter placement section 2, a reference flowmeter 3, and a timing controller 4;
the container 1 is connected to the flowmeter holder 2;
the flowmeter holder 2 is connected to the reference flowmeter 3; the flowmeter placing part 2 can place a flowmeter to be calibrated;
the reference flowmeter 3 is connected to the container 1;
the timing controller 4 is connected with the reference flowmeter 3, the timing controller 4 can control the first measurement time of the reference flowmeter 3, and the timing controller 4 can determine the starting time of the first pulse of the flowmeter to be calibrated through detection and determine the ending time according to the starting time and the first measurement time so as to obtain the flow to be calibrated of the flowmeter to be calibrated between the starting time and the ending time.
The timing controller 4 can determine the starting time of the first pulse of the flowmeter to be calibrated through detection, and determine the ending time according to the starting time and the first measurement time, so as to obtain the flow rate to be calibrated of the flowmeter to be calibrated between the starting time and the ending time. The technical problems that the flow meter to be calibrated loses pulses in the detection process, the detection time is long, and the detection efficiency is low can be solved.
Detecting one flow with the accuracy grade of 1.0 grade and the flow range of (1-10) m3And/h, the flowmeter to be calibrated is a turbine flowmeter with low-frequency pulse output, and the pulse equivalent volume VC is 0.1268L/P. According to the requirement of the turbine flowmeter verification regulation, the relative uncertainty of the measurement result of the pulse number output by the flowmeter in one verification, which is brought by the resolution, is not more than 1/10 of the maximum allowable error absolute value of the detected flowmeter, and when the minimum flow point is detected to be 1m3At/h, the number of pulses should be not less than 1000, the time required for each detection:
when the number of pulses collected per test is 1000, 500, 300 and 132, respectively, the required time and the indication error are as follows:
the above detection results show that, under the minimum flow point, the flowmeter using the timing controller 4 to detect the low-frequency pulse output still has an acceptable range of indication error test results (the maximum difference is 0.25%) on the premise of ensuring the shortest measurement time of the device, and the detection time efficiency is improved by about 7 times.
In the embodiment of the present application, fig. 2 is a schematic structural diagram of a calibration system in the embodiment of the present application; the timing controller 4 includes a first timing control module 41 and a second timing control module 42;
the first timing control module 41 includes a first time setting module 411, the first time setting module 411 being capable of controlling a first measurement time of the reference flowmeter 3;
the second timing control module 42 includes a first pulse detection module 422 and a second time setting module 421, where the first pulse detection module 422 is capable of detecting a pulse of the flow meter to be calibrated when the first time setting module 411 starts timing; the second time setting module 421 can start timing when the flowmeter to be calibrated is detected to be the first pulse, and count to a second measurement time, wherein the second measurement time is equal to the first measurement time.
Further, optionally, fig. 3 is a schematic structural diagram of a calibration system in an embodiment of the present application; the first timing control module 41 includes a second pulse detection module 412, and the first time setting module 411 can start timing when the second pulse detection module 412 detects the first pulse of the reference flowmeter 3.
Specifically, optionally, the function of the timing Controller 4 may be implemented by a Programmable Logic Controller (PLC), where the PLC includes a TP timer, the TP timer is a pulse generation timer, the TP instruction is a "pulse generation" instruction, and may output a pulse, and the pulse width is determined by preset time. The instruction has parameters of IN, PT, ET and Q, when the logic operation Result (RLO) of the human input parameter IN changes from '0' to '1' (signal rising edge), the instruction is started to start timing, the timing time is set by the preset time parameter PT, and the state of the output parameter Q is kept to be 1 IN the preset time, namely, the Q outputs a pulse with the width of the preset time PT. During the timing period, the signal state of the output Q is not affected even if a new rising edge of the RLO signal is detected. FIG. 4 is a schematic diagram of a calibration system according to an embodiment of the present application; the IN end of the first TP timer 71 is connected to the pulse output end 73 of the flowmeter to be calibrated, a first switch is arranged between the IN end of the first TP timer 71 and the pulse output end 73 of the flowmeter to be calibrated, and the Q end of the first TP timer 71 is connected to the timing module 72 of the flowmeter to be calibrated; the IN terminal of the second TP timer 76 is connected to the reference flowmeter pulse output terminal 74, a second switch is disposed between the IN terminal of the second TP timer 76 and the reference flowmeter pulse output terminal 74, and the Q terminal of the first TP timer 71 is connected to the reference flowmeter timing module 75; the PT of the first TP timer 71 is set as the first measurement time, and the PT of the second TP timer 76 is set as the second measurement time, wherein the first measurement time and the second measurement time are equal; after the first switch is closed, the first TP timer 71 starts timing when detecting the first pulse of the pulse output terminal 73 of the flowmeter to be calibrated, and within the first measurement time, the output of the Q terminal of the first TP timer 71 received by the flowmeter to be calibrated timing module 72 is 1, thereby controlling the timing of the flowmeter to be calibrated. Similarly, after the second switch is closed, the second TP timer 76 starts timing when detecting the first pulse of the pulse output terminal 74 of the reference flowmeter, and within the second measurement time, the output of the Q terminal of the second TP timer 76 received by the reference flowmeter timing module 75 is 1, so as to control the timing time of the flowmeter to be calibrated. The PLC may be integrated with a touch display screen, and the touch display screen may set parameters such as the first measurement time and the second measurement time, and may also control the on and off of the first switch and the second switch, but is not limited thereto.
In the embodiment of the present application, fig. 5 is a schematic structural diagram of a calibration system in the embodiment of the present application; the flow meter placement section 2 includes a first flow meter placement section 2 and a second flow meter placement section 2, the first flow meter placement section 2 being disposed in a first direction, the second flow meter placement section 2 being disposed in a second direction, the first direction and the second direction being perpendicular.
Further, optionally, a first pipeline is connected between the container 1 and the reference flowmeter 3, a section of the first pipeline is set to be in the first direction, and the first pipeline is disconnected to form the first flowmeter placing part 2;
a second pipe is connected between the container 1 and the reference flowmeter 3, one section of the second pipe is arranged in the second direction, and the second pipe is disconnected into the second flowmeter placing portion 2.
The system is provided with the first flow meter placing part 2 in the first direction and the second flow meter placing part 2 in the second direction, and the appropriate flow meter placing part 2 can be flexibly selected according to the actual type of the flow meter to be calibrated.
In the embodiment of the application, a first regulating valve is arranged on the first pipeline; the second pipeline is provided with a second regulating valve. Optionally, the first regulating valve may be an electromagnetic regulating valve, a manual regulating valve, etc., but is not limited thereto; the second regulating valve may be an electromagnetic regulating valve, a manual regulating valve, etc., but is not limited thereto. And determining the closing and opening states of the first regulating valve and the second regulating valve according to the fact that the flow meters to be calibrated are placed on the first flow meter placing part 2 and the second flow meter placing part 2, and when the electromagnetic regulating valve is selected, connecting the electromagnetic regulating valve with control equipment to control the closing and opening states of the electronic regulating valve by the control equipment.
In the embodiment of the present application, fig. 6 is a schematic structural diagram of a calibration system in the embodiment of the present application; the system further comprises a power unit 5, a first end of the power unit 5 is connected with the container 1, a second end of the power unit 5 is connected with the reference flow meter 3, and the power unit 5 can provide power for conveying liquid. Alternatively, the power device 5 may be an electric pump, in particular a variable frequency pump, but is not limited thereto.
In the embodiment of the present application, fig. 7 is a schematic structural diagram of a calibration system in the embodiment of the present application; the system further comprises a voltage stabilizing device 6; a first end of the pressure stabilizer 6 is connected to the container 1 and a second end of the pressure stabilizer 6 is connected to the flowmeter holder 2. Alternatively, the pressure stabilizer 6 may be a hydraulic pressure stabilizer, but is not limited thereto.
In the embodiment of the application, the system comprises a reference balance device 8;
the reference balance device 8 is connected to the reference flowmeter 3;
the reference balance device 8 is connected to the container 1;
the flow value measured by the reference balance device 8 can be used as a calibration reference value for the reference flowmeter 3. In particular, the reference balance device 8 can measure the mass of liquid flowing through at the first measurement time, the mass of liquid divided by the density of the liquid, i.e. the volume of liquid flowing through at the first measurement time, and calibrate the reference flow meter 3 according to the volume of liquid and time. The reference balance device 8 is able to calibrate the reference flow meter 3 and can improve the utilization of the system.
In the embodiment of the present application, the reference balance device 8 is detachably connected to the reference flow meter 3 and the container 1. Optionally, the reference balance device 8 and the reference flowmeter 3 are connected by a pipeline, the pipeline is provided with a detachable portion, the reference balance device 8 can be connected after the detachable portion is detached, and the reference balance device 8 can be detached from the pipeline, so that the loss rate of the electronic balance is reduced.
Based on the above explanation, two alternative embodiments are presented below.
Example 1
Referring to fig. 8, fig. 8 is a schematic structural diagram of a calibration system according to an embodiment of the present disclosure; the system comprises a container 1, a power device 5, a pressure stabilizer 6, a flowmeter placing part 2, a reference flowmeter 3 and a timing controller 4; the container 1 is connected with the power device 5, the power device 5 is connected with the pressure stabilizer 6, the pressure stabilizer 6 is connected with the flowmeter placing part 2, the flowmeter placing part 2 is connected with the reference flowmeter 3, the timing controller 4 can control the first measuring time of the reference flowmeter 3, the timing controller 4 can determine the starting time of the first pulse of the flowmeter to be calibrated through detection, and determine the ending time according to the starting time and the first measuring time so as to obtain the flow to be calibrated of the flowmeter to be calibrated between the starting time and the ending time.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A calibration system, comprising a container, a flow meter placement section, a reference flow meter, and a timing controller;
the container is connected with the flowmeter placing part;
the flowmeter placing part is connected with the reference flowmeter; the flowmeter placing part can be used for placing a flowmeter to be calibrated;
the reference flowmeter is connected with the container;
the timing controller is connected with the reference flowmeter and can control first measuring time of the reference flowmeter, the timing controller can determine starting time of a first pulse of the flowmeter to be calibrated through detection, and determine ending time according to the starting time and the first measuring time so as to obtain flow to be calibrated of the flowmeter to be calibrated between the starting time and the ending time.
2. The calibration system of claim 1, wherein the timing controller comprises a first timing control module and a second timing control module;
the first timing control module comprises a first time setting module capable of controlling a first measurement time of the reference flow meter;
the second timing control module comprises a first pulse detection module and a second time setting module, and the first pulse detection module can detect the pulse of the flowmeter to be calibrated when the first time setting module starts timing; the second time setting module can start timing when the flowmeter to be calibrated detects the first pulse and count to a second measurement time, wherein the second measurement time is equal to the first measurement time.
3. The calibration system of claim 2, wherein the first timing control module comprises a second pulse detection module, and wherein the first time setting module is configured to start timing when the second pulse detection module detects a first pulse of the reference flow meter.
4. The calibration system of claim 1, wherein the flow meter placement comprises a first flow meter placement and a second flow meter placement, the first flow meter placement being disposed along a first direction and the second flow meter placement being disposed along a second direction, the first direction and the second direction being perpendicular.
5. The calibration system of claim 4,
a first pipeline is connected between the container and the reference flowmeter, one section of the first pipeline is arranged in the first direction, and the disconnected part of the first pipeline is the first flowmeter placing part;
a second pipeline is connected between the container and the reference flowmeter, one section of the second pipeline is set to be in the second direction, and the disconnected part of the second pipeline is the second flowmeter placing part.
6. The calibration system of claim 5, wherein a first regulating valve is disposed on the first conduit; and a second regulating valve is arranged on the second pipeline.
7. The calibration system of claim 1, further comprising a power device, a first end of the power device being coupled to the vessel and a second end of the power device being coupled to the reference flow meter, the power device being capable of powering the delivery of the liquid.
8. The calibration system of claim 1, wherein the system further comprises a voltage stabilization device;
the first end of the pressure stabilizer is connected with the container, and the second end of the pressure stabilizer is connected with the flowmeter placing part.
9. The calibration system of claim 1, wherein the system comprises a reference balance device;
the reference balance device is connected with the reference flowmeter;
the reference balance device is connected with the container;
the flow value measured by the reference balance device can be used as a calibration reference value of the reference flowmeter.
10. The calibration system of claim 1, further comprising a reference balance device removably coupled to the reference flow meter and the container.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921456164.XU CN210664692U (en) | 2019-09-03 | 2019-09-03 | Calibration system |
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| CN201921456164.XU CN210664692U (en) | 2019-09-03 | 2019-09-03 | Calibration system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109099996A (en) * | 2018-09-13 | 2018-12-28 | 苏州市计量测试院 | A kind of minute gas flowmeter calibrating installation |
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- 2019-09-03 CN CN201921456164.XU patent/CN210664692U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109099996A (en) * | 2018-09-13 | 2018-12-28 | 苏州市计量测试院 | A kind of minute gas flowmeter calibrating installation |
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