CN206248154U - A kind of volumetric flow measures device - Google Patents
A kind of volumetric flow measures device Download PDFInfo
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- CN206248154U CN206248154U CN201621339807.9U CN201621339807U CN206248154U CN 206248154 U CN206248154 U CN 206248154U CN 201621339807 U CN201621339807 U CN 201621339807U CN 206248154 U CN206248154 U CN 206248154U
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- metering
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- volumetric flow
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Abstract
The utility model discloses a kind of volumetric flow metering device, including metering code-disc and sampling control module, the metering code-disc is provided with least two metering echo areas, and the sampling control module includes multiple detection means and control unit；The metering code-disc is divided into multiple sectional areas by the metering launch site with the installation site of the multiple detection means, and the sectional area detected with multiple detection means represents the location status of metering code-disc.In addition, the invention also discloses the metering method that a kind of volumetric flow measures device.Using the utility model, detection frequency is improve, reduce energy consumption.
Description
Technical field
The utility model designs a kind of flow measurement device, more particularly to a kind of volumetric flow metering device.
Background technology
At present, the design direction of volumetric metering utensil main flow is to realize Life cycle not with changing electricity with lithium battery
Pond, will realize that this scheme needs exist for the metering method of low-power consumption, it is ensured that the reliability of metering.The direction of main flow has magnetic to measure
With two kinds of infrared metering：The characteristics of magnetic metered scheme is due to its Magnetic Sensor is to be converted into magnetic signal by experiencing changes of magnetic field
It is Volume Changes of the electric signal to meter gaseous, accurate metering is difficult to realize when being disturbed by external magnetic field.
Device, the generally change using one group of infrared tube to flow are measured using the volumetric flow of infrared ray statistics flow
Change is measured, and the reflected signal of the metering code-disc of device is measured according to volumetric flow, and the position to measuring code-disc is united
Meter, the position being achieved in that is single positional information, therefore statistical accuracy is not high, and application condition is big.
Utility model content
The purpose of this utility model provides a kind of volumetric flow metering device, improves measuring accuracy.
To solve the problems, such as prior art, the utility model provides a kind of volumetric flow metering device, the device
Including：Metering code-disc and sampling control module, the metering code-disc are provided with least two metering echo areas, the controlling of sampling
Module includes multiple detection means and control unit；The installation site of the metering launch site and the multiple detection means is by institute
State metering code-disc and be divided into multiple sectional areas, the sectional area detected with multiple detection means represents the position shape of metering code-disc
State；
The detection means is electrically connected with described control unit, and the detection means is used for metering code-disc sending signal simultaneously
Receive through measuring the signal that code-disc reflecting medium is launched, and send signal to control unit.
In addition, the detection means is infra-red ray detection device, the infra-red ray detection device includes a pair of infrared ray hairs
Penetrate unit and infrared receiver unit.
In addition, the quantity of the infra-red ray detection device is three, three infra-red ray detection devices are red including three pairs
Line line transmitting tube and infrared receiver tube, three pairs of infrared emission tubes and infrared receiver tube are mutually in 120 degree of settings.
In addition, the infra-red ray detection device surface is smaller than 3mm to metering code-disc surface.
In addition, the detection means also includes pull-up resistor, one end of the pull-up resistor is connected with power input, institute
The other end of pull-up resistor is stated to be connected with the output end of infrared receiver tube.
In addition, also including：Sample circuit；One end of the sample circuit is connected with the output end of detection means, described to adopt
The other end of sample circuit is connected with the sampling end of control unit；
The sample circuit, for gathering the voltage signal from the multiple detection means, and by the voltage signal
After send to control unit.
In addition, the sample circuit is modulus sample circuit.
The volumetric flow metering device of utility model includes multiple detection means, is improve compared with single detection means
The precision of flow measurement；In addition, metering echo area is divided into multiple segmentations with the installation site of multiple detection means by code-disc is measured
Region, and the location status of metering code-disc are represented with the sectional area that multiple detection means are detected, further increase stream
The precision of gauge amount.
Brief description of the drawings
Fig. 1 is a kind of schematic diagram of the first embodiment of volumetric flow metering device of the utility model；
Fig. 2 is that a kind of metering code-disc of volumetric flow metering device of the utility model is closed with the position of photoelectric detection system
It is schematic diagram；
Fig. 3 is a kind of a kind of showing for embodiment of the subregion of the metering code-disc of volumetric flow metering device of the utility model
It is intended to；
Fig. 4 is a kind of a kind of signal of embodiment of the photoelectric detection system of volumetric flow metering device of the utility model
Figure.
Specific embodiment
The utility model is described in detail below in conjunction with the accompanying drawings.
With reference to Fig. 1, the figure is the first embodiment schematic diagram that a kind of volumetric flow of the utility model measures device, the dress
Put including：Metering code-disc 1 and sampling control module 2, wherein sampling control module include multiple detection means 21 and control unit
22；Metering code-disc 1 is connected with the mechanical driving mechanism of metering device, is rotated by the mechanical driving mechanism；Detection means 21
For sending optical signal to metering code-disc and receiving the optical signal for launching medium emission through measuring code-disc, and the optical signal is turned
It is changed to voltage signal；Control unit 22 is used to determine the metering that each photoelectric detection system is detected according to the voltage signal for receiving
The region of code-disc, the location status coding of current metering code-disc is determined according to the corresponding region of detection means for determining；Will be current
Location status are encoded with the previous location status encoding ratio for having stored compared with it is determined that the front and rear differential seat angle for rotating twice；And root
Corresponding flow is counted according to the differential seat angle for determining；
Metering code-disc 1, is provided with least two metering echo areas, and the reflection that different echo areas sets different colours is situated between
Matter, wherein entirely metering code-disc can be echo area, and the differentiation of different echo areas is realized by reflecting medium, that is, lead to
The reflecting medium of different colours is crossed to distinguish.For example, when echo area is two, the color of its reflecting medium is two kinds, as
Double color reflection medium, both colors can be white and black, and transmitting can be produced during optical signal launch to reflecting medium surface,
Because the reflected intensity of two kinds of colors all light is different, the intensity of the optical signal of corresponding different colours reflection is also different；In addition, meter
Amount echo area is divided into multiple sectional areas, segment identifier mentioned herein with the installation site of multiple detection means by code-disc is measured
Domain, the circumference that will measure code-disc is divided into multistage, and specific method is the color according to each segmentation correspondence individual reflection medium,
Then the position in conjunction with detection means is segmented.For example, when reflecting medium is two kinds of colors, and detection means is 3, this
It is that the circumference for measuring code-disc is divided into 6 points of ends.
Detection means 21, can use photoelectric detection system, such as infrared ray electric detection means, or other photoelectricity
Detection means；
Control unit 22, be stored with metering code-disc location status coding, when specifically being stored, is typically stored with multiple inspections
Survey the sectional area label of the metering code-disc that device is detected and the corresponding relation of metering code-disc location status coding；For example set
During the respectively 1-3-5 of the region that multiple detection means are detected, the location status for measuring code-disc are encoded to 110；
Metering code-disc is divided into multiple areas by the present embodiment according to the reflecting medium of metering code-disc and the quantity of detection means
Domain, control unit determines the metering code-disc color that detection means is detected according to the signal that each detection means is detected, and then really
The location status of devise a stratagem amount code-disc, and the location status coding of metering code-disc is stored, thus can be by front and rear position twice
Configuration state coding is compared, it is determined that the front and rear differential seat angle for rotating twice, realizes the statistics of flow；On the one hand, from survey device
Quantity on see, multiple photoelectric detection systems improve the degree of accuracy of detection signal；In addition, to metering code-disc is divided into multiple points
Section region, the sectional area detected with detection means characterizes the location status of metering code-disc, and stores every by control unit
The location status coding of individual metering code-disc, facilitates the storage of metering code-disc location status；And by front and rear position shape twice
State coding comparing come determine measure code-disc rotate differential seat angle, reduce the error of statistics, heightened the accurate of statistics
Degree.
Referring to Fig. 2, the figure is that a kind of metering code-disc of volumetric flow metering device of the utility model is filled with Photoelectric Detection
The position relationship schematic diagram put, metering code-disc 1 is provided with double color reflection and combines respectively black reflection medium 11 and white reflective
Medium 12；3 photoelectric detection systems 2, respectively the first photoelectric detection system 211, the second smooth electric-examination are provided with the present embodiment
Survey the photoelectric detection system 213 of device 212 and the 3rd；Each photoelectric detection system is provided with a pair of light-emitting tubes and light-receiving
Pipe, three pairs of light-emitting tubes and light receiving tube (referred to as three pairs photoelectric tubes) are set towards metering code-disc, are between three pairs of photoelectricity coffins
120 degree, the center alignment metering code-disc circle ring center position of each pair photoelectric tube.With reference to Fig. 3, can be according to 3 light electric-examinations
The set location and the double-colored reflecting medium of metering code-disc of device are surveyed, metering code-disc can be divided into 6 equal portions, 60 ° every part, i.e., 6
Individual region, so for measuring accuracy 6m3 tables (metering device), turns round volume 1.2L, accuracy of identification 0.2L (existing meter amount essences
Degree 10L).Label 1-6 in order, wherein 1-3 are black, and 4-6 is white.The data fit that three infrared sensors are sampled with
Lower situation：
In metering code-disc rotary course, the sampling of infrared ray reception pipe may sample black and white code-disc intersection, receive
To data may judge by accident, as a result of multiple photoelectric detection systems, i.e., multipair light generates electricity pipe, tired by using residual quantity
Long-pending mode can avoid the error of sampling.The zone sequence of such as sampling is 5-1-3, because code-disc rotating speed is uneven, may be led
Cause infrared tube be in 6,1 boundary position inclined 1, it should be the such code-disc in 1 region turn over 2 regions think use 0.4L gases,
But sampled value is judged as 6 regions, then think leakage meter 0.2L.But spiraled in metering time-code next time and go to 3 regions, control unit
Judgement is that therefore being measured by 3 regions increases 0.6L, and the 0.2L that will thus lack before is more as starting point from 6 regions
Recover, it is ensured that metering total amount does not occur error.
With reference to Fig. 4, the figure is that a kind of one kind of the photoelectric detection system of volumetric flow metering device of the utility model is real
The schematic diagram of example is applied, the photoelectric detection system includes：Photoemission cell 201, photoelectric receiving tube 202, pull-up resistor 203, current limliting
Resistance 204, the anode of photoemission cell 201 is connected with one end connection of current-limiting resistance 204, the other end of current-limiting resistance 204 with
Power input VCC is connected, and the one end of power input VCC also with pull-up resistor 203 is connected, the other end of pull-up resistor 203
Be connected with output end, the common port of photoelectric receiving tube 202 and current-limiting resistance as photoelectric detection system output end.
Current-limiting resistance 204 and pull-up resistor 203 adjust theirs as the internal resistance of photoelectric detection system in the technical program
Resistance can adjust the internal resistance of photoelectric detection system, so that optical signal is converted to voltage signal.The interior resistive of photoelectric receiving tube 202
Change speed related to the electric current and luminous intensity by it, it is in luminous intensity one regularly, faster by electric current more imperial palace resistive rate,
Luminous intensity is as the same；Because the resistance of overall power requirement limitation current-limiting resistance 204 is unable to very little, and structure distance is limited and light
Need to be reflected by code-disc, cause luminous intensity weaker, to ensure internal resistance rate of change, it is necessary to motor current as far as possible, it is necessary to suitable
When the value for reducing pull-up resistor 203, the resistance of the pull-up resistor 203 in the technical program may remain in less resistance, because
This ensure that the stabilization of the voltage signal of infrared receiving tube；Specifically, for 6m3The maximum stream flow of table is 7.2m3/ h is maximum
Gas by 2L per second under flow condition, because sampling precision requirement 0.2L, per second sampling 10 times can meet
It is required that i.e. metering frequency at least meets 10Hz.
To ensure sampling precision, sample frequency will at least meet 2 times of metering frequency, therefore sample frequency under normal circumstances
20Hz (i.e. 50ms samples once).
Because system is lithium battery power supply, high to ensure system voltage stability, infrared tube receiving sensitivity, every group red
The outer electric current to pipe sampling period is less than 4mA.
The overall power of metering system is less than 0.25Ah/, i.e. average power consumption less than 57uA as requested, and conversion is obtained
The maximum actuation time of infrared tube is 713us.
Requirement that ensure measuring accuracy, and can interpolate that metering code-disc rotation direction and gas flow rate whether mistake
Hurry up, placed in 120 ° of angles respectively using three groups of infrared tubes.Therefore the working time requirement of each group of infrared tube is less than
237us (i.e. completes voltage acquisition) in 237us.
To be voltage signal stabilization, the reliability for ensureing infrared receiving tube within such working time, it is necessary to receive
The pull-up resistor of pipe circuit is maintained at less resistance, and the photoelectric detection system in the technical program can meet such just
Demand.
The above is preferred embodiment of the present utility model, it is noted that for the ordinary skill of the art
For personnel, on the premise of the utility model principle is not departed from, some improvements and modifications can also be made, these improve and moisten
Decorations are also considered as protection domain of the present utility model.
Claims (7)
1. a kind of volumetric flow measures device, it is characterised in that including：Metering code-disc and sampling control module, the metering
Code-disc is provided with least two metering echo areas, and the sampling control module includes multiple detection means and control unit；It is described
The metering code-disc is divided into multiple sectional areas by metering echo area with the installation site of the multiple detection means, is examined with multiple
The sectional area that survey device is detected represents the location status of metering code-disc；
The detection means is electrically connected with described control unit, and the detection means is used for metering code-disc sending signal and receives
Through measuring the signal that code-disc reflecting medium is launched, and send signal to control unit.
2. volumetric flow according to claim 1 measures device, it is characterised in that the detection means is that infrared ray is examined
Device is surveyed, the infra-red ray detection device includes a pair of infra-red ray transmitting units and infrared receiver unit.
3. volumetric flow according to claim 2 measures device, it is characterised in that the number of the infra-red ray detection device
It is three to measure, and three infra-red ray detection devices include three pairs of red line line transmitting tubes and infrared receiver tube, and described three pairs red
Outside line transmitting tube and infrared receiver tube are mutually in 120 degree of settings.
4. volumetric flow according to claim 2 measures device, it is characterised in that the infra-red ray detection device surface
3mm is smaller than to metering code-disc surface.
5. volumetric flow according to claim 2 measures device, it is characterised in that the detection means also includes pull-up
Resistance, one end of the pull-up resistor is connected with power input, the other end and the infrared receiver tube of the pull-up resistor
Output end is connected.
6. the volumetric flow according to any one of claim 1-5 measures device, it is characterised in that also include：Sampling
Circuit；One end of the sample circuit is connected with the output end of detection means, the other end and control unit of the sample circuit
Sampling end connection；
The sample circuit, for gathering the voltage signal from the multiple detection means, and will send out after the voltage signal
Deliver to control unit.
7. volumetric flow according to claim 6 measures device, it is characterised in that the sample circuit is that modulus is sampled
Circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621339807.9U CN206248154U (en) | 2016-12-07 | 2016-12-07 | A kind of volumetric flow measures device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621339807.9U CN206248154U (en) | 2016-12-07 | 2016-12-07 | A kind of volumetric flow measures device |
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| Publication Number | Publication Date |
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| CN206248154U true CN206248154U (en) | 2017-06-13 |
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ID=59005390
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621339807.9U Active CN206248154U (en) | 2016-12-07 | 2016-12-07 | A kind of volumetric flow measures device |
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| Country | Link |
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| CN (1) | CN206248154U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111044109A (en) * | 2019-12-06 | 2020-04-21 | 金卡智能集团股份有限公司 | Metering instrument photoelectric sampling assembly and metering instrument |
-
2016
- 2016-12-07 CN CN201621339807.9U patent/CN206248154U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111044109A (en) * | 2019-12-06 | 2020-04-21 | 金卡智能集团股份有限公司 | Metering instrument photoelectric sampling assembly and metering instrument |
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