CN207268637U - A kind of fluid flowmeter gathers decoding circuit - Google Patents
A kind of fluid flowmeter gathers decoding circuit Download PDFInfo
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- CN207268637U CN207268637U CN201721339719.3U CN201721339719U CN207268637U CN 207268637 U CN207268637 U CN 207268637U CN 201721339719 U CN201721339719 U CN 201721339719U CN 207268637 U CN207268637 U CN 207268637U
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- circuit
- flowmeter
- microprocessor
- collection
- interface
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Abstract
The utility model belongs to flowmeter relevant device field, and disclose a kind of fluid flowmeter collection decoding circuit, including microprocessor, filter circuit, 485 communication interface circuits, perpetual calendar circuit, eeprom memory circuitries and monobus temperature collection circuit, microprocessor is connected by interrupt interface A and interrupt interface B with filter circuit, and filter circuit connects flowmeter sensor A and flowmeter sensor B respectively；Microprocessor connects the perpetual calendar circuit, eeprom memory circuitries and monobus temperature collection circuit respectively；485 communication interface circuit is used for interface and the communication for providing human-computer interaction, and the microprocessor connects main display device by 485 communication interface circuit.The utility model is using interruptionization collection design, and pulse collection is extremely stable, and precision is higher, and reliability is high, high safety and applicability are wide, suitable for the application in terms of existing all kinds of flowmeter pulses data acquisitions.
Description
Technical field
The utility model belongs to flowmeter relevant device field, gathers and decodes more particularly, to a kind of fluid flowmeter
Circuit.
Background technology
At this stage, general fluid flow is divided into eddy-current flowmeter, target type meter etc., and detection circuit, normal utilization are electric
Bridge and calibration curve obtain fluid flow valve；Bridge circuit, has the driving means using the multistage change of its circuit characteristic value；Inspection amount
The general general layout grade setting of line is multiple, with the corresponding calibration curve of electric bridge varying circuit property values selection, obtains corresponding flow value.
However, flowmeter acquisition control circuit is realized by analog/digital conversion in the prior art, to circuit
Required precision is higher, and cost is also therefore higher, and to keep A/D circuit precision stabilities to be also required to more expensive conversion chip.
Utility model content
For the disadvantages described above or Improvement requirement of the prior art, the utility model provides a kind of fluid flowmeter collection of knowing clearly
Decoding circuit, pulse collection is extremely stable, and precision is higher.
To achieve the above object, according to the utility model, there is provided a kind of fluid flowmeter gathers decoding circuit, its feature
It is, including microprocessor, filter circuit, 485 communication interface circuits, perpetual calendar circuit, eeprom memory circuitries and list are total
Line temperature collection circuit, wherein,
The microprocessor is connected by interrupt interface A and interrupt interface B with the filter circuit, the filter circuit point
Lian Jie not flowmeter sensor A and flowmeter sensor B；
The microprocessor connects the perpetual calendar circuit, eeprom memory circuitries and monobus temperature acquisition electricity respectively
Road；
485 communication interface circuit is used for interface and the communication for providing human-computer interaction, and the microprocessor passes through described
485 communication interface circuits connect main display device.
Preferably, the stopwatch being connected with the microprocessor is further included, for being obtained just according to quality, density and time
True flow.
Preferably, the flowmeter sensor A and flowmeter sensor B are pulse transducer.
In general, by the contemplated above technical scheme of the utility model compared with prior art, can obtain down
Row beneficial effect：
The utility model is using interruptionization collection design, by being connect to its key component such as processor interrupt structure, communication
The construction of mouth, and its circuit connecting mode between other multiple components etc. are studied and designed, mutually should be able to be more
It is compact flexibly, easy to gather decoding flow meter data, the monitoring process of manipulation ground traffic data, its pulse collection is extremely steady
It is fixed, signal of communication Lothrus apterus, and possess the advantages that reliability is high, high safety and applicability are wide, suitable for existing all kinds of flows
Count the application in terms of pulse data collection.
Brief description of the drawings
Fig. 1 is the system block diagram of the utility model.
Embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, is further elaborated the utility model.It should be appreciated that specific embodiment described herein is only explaining
The utility model, is not used to limit the utility model.In addition, institute in each embodiment of the utility model disclosed below
As long as the technical characteristic being related to does not form conflict and is mutually combined each other.
With reference to Fig. 1, a kind of fluid flowmeter gathers decoding circuit, including microprocessor, filter circuit, 485 communication interfaces
Circuit, perpetual calendar circuit, eeprom memory circuitries and monobus temperature collection circuit, wherein,
The microprocessor is connected by interrupt interface A and interrupt interface B with the filter circuit, the filter circuit point
Lian Jie not flowmeter sensor A and flowmeter sensor B；
The microprocessor connects the perpetual calendar circuit, eeprom memory circuitries and monobus temperature acquisition electricity respectively
Road；
485 communication interface circuit is used for interface and the communication for providing human-computer interaction, and the microprocessor passes through described
485 communication interface circuits connect main display device, and a main display device can connect multiple collection decoding circuits at the same time
Further, perpetual calendar circuit uses DS1302 real-time clock modules, and eeprom memory circuitries use 24C512 moulds
Block, monobus temperature collection circuit use DS18B20 temperature sensors.
Further, the stopwatch being connected with the microprocessor is further included, for being obtained just according to quality, density and time
True flow.
Further, the flowmeter sensor A and flowmeter sensor B are pulse transducer.
The utility model uses interrupt pulse collection mode, have also been devised hardware-software shake removal function, there is provided one
Kind is using traffic statistics circuit and corresponding sampling software.
The principle formula provided according to pulse transducer design side, M=K*0.0125*P* ρ * T
M：Gross mass
K：The eigenvalue of each sensor
P：Overall pulse number
ρ：Fluid density
T：Temperature coefficient
It is critical to gather the accurate umber of pulse that sensor transmits.Acquisition Circuit key is to employ interrupt mode identification sensing
Device number of pulses, will not pulse-losing number in principle.Since fluid density is with temperature change, there is provided a monobus temperature
Acquisition module, different coefficient effective densities is used according to temperature.
The parameters such as the umber of pulse of collection, display module is transferred to by 485 communication data frames of standard.Collection is from sensing
The pulse data of device simultaneously sent a data frame, its signal of communication Lothrus apterus according to every 1 second, and possessed reliability height, security
The advantages that strong and applicability is wide.
Data on flows is obtained for convenience, it is necessary to there is correct time benchmark, this circuit is provided with a perpetual calendar circuit,
Including Hour Minute Second and week date, in addition an also stopwatch, according to quality, density, time, can calculate correct stream
Amount.
In order to store k-factor, gathered data is recorded, there is provided an eeprom memory circuit.
To sum up, according to the more flexible specification of flow pulse data acquiring control circuit unitary construction of the utility model, energy
It is enough flexible, signal of communication Lothrus apterus, and possess the advantages that reliability is high, high safety and applicability are wide, thus suitable for existing
Application in terms of all kinds of flowmeter pulses data acquisitions.
As it will be easily appreciated by one skilled in the art that the above is only the preferred embodiment of the utility model only, not
To limit the utility model, any modification for being made where within the spirit and principles of the present invention, equivalent substitution and change
Into etc., it should be included within the scope of protection of this utility model.
Claims (3)
1. a kind of fluid flowmeter gathers decoding circuit, it is characterised in that including microprocessor, filter circuit, 485 communication interfaces
Circuit, perpetual calendar circuit, eeprom memory circuitries and monobus temperature collection circuit, wherein,
The microprocessor is connected by interrupt interface A and interrupt interface B with the filter circuit, and the filter circuit connects respectively
Meet flowmeter sensor A and flowmeter sensor B；
The microprocessor connects the perpetual calendar circuit, eeprom memory circuitries and monobus temperature collection circuit respectively；
485 communication interface circuit is used for interface and the communication for providing human-computer interaction, and the microprocessor is logical by described 485
Communication interface circuit connects main display device.
A kind of 2. fluid flowmeter collection decoding circuit according to claim 1, it is characterised in that further include with it is described micro-
The stopwatch of processor connection, for obtaining correct flow according to quality, density and time.
A kind of 3. fluid flowmeter collection decoding circuit according to claim 1, it is characterised in that the flowmeter sensing
Device A and flowmeter sensor B is pulse transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721339719.3U CN207268637U (en) | 2017-10-18 | 2017-10-18 | A kind of fluid flowmeter gathers decoding circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721339719.3U CN207268637U (en) | 2017-10-18 | 2017-10-18 | A kind of fluid flowmeter gathers decoding circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207268637U true CN207268637U (en) | 2018-04-24 |
Family
ID=61954881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721339719.3U Active CN207268637U (en) | 2017-10-18 | 2017-10-18 | A kind of fluid flowmeter gathers decoding circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207268637U (en) |
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2017
- 2017-10-18 CN CN201721339719.3U patent/CN207268637U/en active Active
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