CN104949720B - Flow rate testing methods and device, purifier - Google Patents
Flow rate testing methods and device, purifier Download PDFInfo
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- CN104949720B CN104949720B CN201410729346.5A CN201410729346A CN104949720B CN 104949720 B CN104949720 B CN 104949720B CN 201410729346 A CN201410729346 A CN 201410729346A CN 104949720 B CN104949720 B CN 104949720B
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Abstract
The disclosure is directed to a kind of flow rate testing methods and devices, purifier, the flow rate testing methods are used for flowmeter, it is characterised in that, the flow rate testing methods detect the pulsewidth for the pulse signal that the sensor of the flowmeter is issued comprising steps of at set time intervals；According to the pulsewidth, the subtotal flow in the time interval is calculated；And total each subtotal flow for stopping passing through the flowmeter by flowmeter to fluid from fluid, obtain total flow.The flow rate testing methods of the disclosure can be improved detection speed and detection accuracy.
Description
Technical field
This disclosure relates to flow measurement technical field more particularly to a kind of flow rate testing methods and flow detector, with
And the purifier with the flow detector.
Background technique
In the related technology, it usually will increase flow detection function in water purification product, mainly auxiliary filter element life calculates, and tires out
Count the filtering water of filter core.In household electrical appliances intelligentized today, in intelligent water purification product, the water purification stream that user uses is detected
Amount, is also act as providing value-added service for user, such as the daily water purification water consumption of counting user, total water consumption.
Realize that above-mentioned function requires that flow detection will reach quickly detection speed and higher detection accuracy, otherwise
Excessive detection error, which will cause filter element life and calculate, occurs severe deviations, in turn results in malfunction.If being used for value-added service,
Also user experience is affected.And for detecting speed, if detection speed is slower, user wants to understand real-time traffic information
When, it cannot show in time, user is allowed to wait, also will affect user experience.
Summary of the invention
To overcome the problems in correlation technique, the disclosure provide a kind of flow rate testing methods, flow detector and
A kind of purifier.
According to the first aspect of the embodiments of the present disclosure, a kind of flow rate testing methods are provided, comprising steps of
At set time intervals, the pulsewidth for the pulse signal that the sensor of the flowmeter is issued is detected；
According to the pulsewidth, the subtotal flow in the time interval is calculated；And
It is total to stop each subtotal flow by the flowmeter by flowmeter to fluid from fluid, obtain total stream
Amount.
Optionally, at set time intervals, the pulsewidth for the pulse signal that the sensor of the flowmeter is issued is detected
The step of in, to detect the rising edge of the pulse signal to the duration for the failing edge for detecting the pulse signal as institute
State pulsewidth.
Optionally, at set time intervals, the pulsewidth for the pulse signal that the sensor of the flowmeter is issued is detected
The step of in, the time interval be one second.
Optionally, according to the pulsewidth, the step of calculating the subtotal flow in the time interval, comprising:
The frequency of the pulse signal is obtained by the pulsewidth；
By the flow of the flowmeter and the corresponding relationship of the pulse signal frequency, obtain in half of pulse signal cycle
Instantaneous flow；And
With the multiple of the time interval and the pulsewidth multiplied by the instantaneous flow, the subtotal flow is obtained.
Optionally, the flow rate testing methods further include step,
Obtain a setting flow value；
Judge whether the current value of total flow is more than or equal to the setting flow value, continues to judge Ru no；It is then
Signal of the triggering one for the fluid that stops.
Optionally, the flow rate testing methods further include step,
Obtain the filtering water maximum value of a filter core；
Each total flow of the filter core from after using is accumulated as aggregate flow；
Judge whether the aggregate flow is greater than a setting percentage of the filtering water maximum value, continues to sentence Ru no
It is disconnected；It is then
Trigger the signal that service life early warning is carried out to the filter core.
According to the second aspect of an embodiment of the present disclosure, a kind of flow apparatus is provided, comprising:
Detection module, at set time intervals, detecting the pulse signal that the sensor of the flowmeter is issued
Pulsewidth；
Computing module, for calculating the subtotal flow in the time interval according to the pulsewidth；And
Total module is each small when stopping from fluid by the flowmeter to fluid by the flowmeter for adding up to
Flow is counted, total flow is obtained.
Optionally, the detection module includes detection unit and timer, and the detection unit is for detecting the pulse
The rising edge and failing edge of signal, the timer to detect the rising edge to detection to the failing edge duration carry out
Timing is using as the pulsewidth.
It optionally, further include time interval setup unit in the detection unit, the time interval setup unit setting
The time interval be one second.
Optionally, the computing module includes:
Frequency computing unit calculates the frequency of the pulse signal according to the pulsewidth；
Instantaneous flow calculates unit, corresponding relationship and institute for flow and pulse signal frequency according to the flowmeter
The frequency that frequency computing unit transmits is stated, the instantaneous flow in half of pulse signal cycle is calculated；And
Subtotal unit, for the multiple of the time interval and the pulsewidth multiplied by the instantaneous flow, described in calculating
Subtotal flow in time interval；
Optionally, total module, comprising:
Storage unit, for storing the current total stream obtained according to the subtotal flow rate calculation that the subtotal unit transmits
Amount；
Total unit, current total flow of subtotal flow and storage unit storage for being transmitted to the subtotal unit
It is added up and updates currently total flow, and updated currently total flow is stored in the storage unit.
Optionally, the flow detector further includes automatic cut out module, is connected to total module, described automatic
Turning off module includes:
Input unit, for receiving a setting flow value；
Whether comparing unit, the current total flow transmitted for total module are more than or equal to the setting stream
Magnitude, currently whether total flow is more than or equal to the setting flow value；And
Signal trigger unit makes the signal of the fluid cutout for triggering one.
Optionally, the flow detector further includes warning module, and the warning module includes:
Input unit, for receiving the filtering water maximum value of a filter core；
Unit is amounted to, for accumulating each total flow that total module of the filter core from after using transmits as total
Flow；
Judging unit, for judging whether the aggregate flow is greater than a setting percentage of the filtering water maximum value
Than until judging result is yes；And
Prewarning unit, is connected to the judging unit, and the judging result of the judging unit is when being, to trigger to the filter
The signal of core progress service life early warning.
According to the second aspect of an embodiment of the present disclosure, a kind of purifier is provided, the purifier has the disclosure
Flow detector.
The technical scheme provided by this disclosed embodiment can include the following benefits: embodiment of the disclosure, utilize
Pulse width detection method, in conjunction with the flow rate calculation formula of flowmeter producer, it is only necessary to which the pulse signal of half period can be realized fast
The fluid flow detection of speed, pinpoint accuracy.Detection method compared with prior art, the embodiment of the present disclosure based on pulse width detection
Flow rate testing methods, measurement accuracy maximum can be doubled, while also accelerate detection speed.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
The disclosure can be limited.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows and meets implementation of the invention
Example, and be used to explain the principle of the present invention together with specification.
Fig. 1 is a kind of schematic diagram of the purifier exemplified according to an exemplary implementation.
Fig. 2 is the schematic diagram of pulse signal transmitted by the flowmeter of purifier shown in Fig. 1.
Fig. 3 is a kind of flow chart of flow rate testing methods shown according to an exemplary embodiment.
Fig. 4 is a kind of flow chart of the calculating subtotal flow of flow rate testing methods shown according to an exemplary embodiment.
Fig. 5 is a kind of flow chart of the fluid automatic cut out of flow rate testing methods shown according to an exemplary embodiment.
Fig. 6 is a kind of flow chart of the filter element life early warning of flow rate testing methods shown according to an exemplary embodiment.
Fig. 7 is a kind of block diagram of flow detector shown according to an exemplary embodiment.
Fig. 8 is a kind of block diagram of the detection module of flow detector shown according to an exemplary embodiment.
Fig. 9 is a kind of block diagram of the computing module of flow detector shown according to an exemplary embodiment.
Figure 10 is a kind of block diagram of total module of flow detector shown according to an exemplary embodiment.
Figure 11 is a kind of block diagram of the automatic cut out module of flow detector shown according to an exemplary embodiment.
Figure 12 is a kind of block diagram of the warning module of flow detector shown according to an exemplary embodiment.
Figure 13 is the subtotal unit of flow detector shown according to an exemplary embodiment a kind of, total unit and total
The data for counting unit transmit schematic diagram.
Specific embodiment
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistented with the present invention.On the contrary, they be only with it is such as appended
The example of device and method being described in detail in claims, some aspects of the invention are consistent.
One exemplary embodiment of the disclosure, discloses a kind of purifier, as shown in Figure 1, the purifier includes
Feed water flow meter 105, water flow meter 109 etc..The water inlet of the purifier by preposition two-stage filter core 101,102, then
It is connected to feed water flow meter 105, is connected to booster pump 106, and then is connected to reverse osmosis filter core 107, reverse osmosis filter core 107
There are two water outlets, and one is concentrated water outlet, output condensed water to condensed water outlet pipe (not shown)；The other is
Pure water water outlet is connected to postposition filter core 108, then concatenates water flow meter 109, is eventually connected to pure water water outlet (figure
In be not shown).
The purifier of the exemplary embodiment of the disclosure, feed water flow meter 105, water flow meter 109 have this public affairs
The flow detector for the exemplary embodiment opened.
One embodiment of the disclosure introduced below:
For flowmeter, with more inexpensive flow detection using paddle wheel flowmeter, paddle wheel flowmeter has
Runner and sensor, when there is fluid (such as water flow) to pass through flowmeter, runner rotation makes sensor issue pulse signal.It is logical
It crosses controller and statistical disposition is carried out to these pulse signals, data on flows can be converted into.
The flow algorithms of paddle wheel flowmeter are, for example, to count pulse number.Flowmeter producer can be in the data such as the description of product
To the corresponding fluid flow rate relational expression of pulse number of flow meter, such as following formula 1:
F=aQ+b (formula 1)
F is pulse frequency, and Q is the flow of unit time.By the pulse number of statistical unit time, given further according to producer
Formula 1 can be following 2 unit of account time of formula water flow:
Q=(F-b)/a (formula 2)
Using the flow rate testing methods of above-mentioned flow algorithms, need to detect pulse frequency F, the i.e. pulse of unit time
Number.Pulse number is detected, the length of selected unit time is first had to.Unit time acquirement can be long, the unit time
Can obtain it is shorter, since pulse frequency F itself is relatively low, the pulse that is few, and detecting of the pulse number of unit time
It can be dropped due to imperfect.
One exemplary embodiment of the disclosure introduced below:
An exemplary embodiment of the invention, using pulse width detection method, in conjunction with the flow rate calculation formula of flowmeter producer,
The pulse signal for only needing half period, can be realized quickly, accurately detect water flow.
Fig. 3 is a kind of flow chart of flow rate testing methods shown according to an exemplary embodiment, the demonstration of the disclosure
The flow rate testing methods of embodiment are in the purifier of the disclosure, being the feed water flow meter 105 for purifier and going out
In water ga(u)ge 109, as shown in figure 3, the flow rate testing methods of the present embodiment include the following steps.
In step sl, at set time intervals, the pulse signal that the sensor of the flowmeter is issued is detected
Pulsewidth；
In step s 2, according to the pulsewidth, the subtotal flow in the time interval is calculated；
In step s3, add up to each subtotal flow for stopping passing through the flowmeter by flowmeter to fluid from fluid,
Obtain total flow.
Fluid described in the disclosure, including but is not limited to is water flow, is also possible to other fluid liquids or gaseous fluid, example
Air stream in such as solution, liquid gas flow and ventilation equipment, heated airflow or cold airflow in air conditioner facility etc..
The flow rate testing methods of the embodiment of the present disclosure, each step are described below respectively:
Step S1:
In this step, runner stream is detected by the micro-control unit (Micro Control Unit, abbreviation MCU) of purifier
The pulsewidth W of meter.When having liquid or fluid passes through paddle wheel flowmeter, the runner of paddle wheel flowmeter is started turning, flowmeter
Sensor emission pulse signal, the waveform diagram of pulse signal is as shown in Fig. 2, the MCU of purifier detects the pulse signal, tool
Body is the pulsewidth for detecting the pulse signal.
The specific implementation of pulse width detection can be the high level duration of one pulse of detection, that is, right
One duration carries out timing and carries out timing by timer since the rising edge for detecting pulse signal, to detecting the arteries and veins
When rushing the failing edge of signal, timing terminates, and the duration counted is the pulsewidth of pulse signal.But the disclosure is not limited to above
The method stated carries out pulse width detection.
For pulse width detection, cannot ceaselessly be detected at a moment, in order to avoid improve the processing complexity of flow detection.Pulsewidth
Detection needs certain frequency, that is to say, that it is separated by the time interval of a setting to be detected, and in this time interval
It is interior, then it is assumed that the frequency of pulse signal is constant.The time interval of this setting, can be one second, that is to say, that the frequency of detection
It is 1 time/second.It is considered that the frequency of pulse signal is constant in this time interval.If user is in purifier upper accepting water
Time be 10 seconds, then at this moment need to detect 10 pulsewidths in total.1 second is one than better suited time interval, if interval
It is too big, do not ensure that frequency does not change in this time interval, influences whether the precision of flow detection.
Step S2:
It is that the pulsewidth of the pulse signal by detecting described in step S1 is particularly counted to calculate flow in this step
The subtotal flow in setting time interval is calculated, is not to obtain the total flow in a process fluid flow.
The disclosure, in order to distinguish the flow cumulative process of different stage, respectively with subtotal flow, total flow and total stream
Amount is distinguished, and the flow in setting time interval is subtotal flow, and the flow in a process fluid flow is total flow,
Such as switch for opening water receiving in purifier to water receiving switch is shut, connect the flow of one glass of water.And repeatedly fluid flowing
The total flow of process is aggregate flow.
As shown in figure 4, this step can be divided into following small step:
Step S21 is obtained the frequency of the pulse signal by the pulsewidth；
Since the time of one pulsewidth of detection is very short, it is believed that instantaneous velocity is constant.And it is possible to set biography
The pulse duty cycle for the pulse signal that sensor issues is 50%, i.e., the pulse period where measured pulsewidth is 2W, pulse frequency F
It is the inverse of twice of pulsewidth for 1/ (2W) namely frequency.
Step S22 obtains half of pulse letter by the flow of the flowmeter and the corresponding relationship of the pulse signal frequency
Instantaneous flow in number period.
Still with flowmeter producer give indicate flow, the formula 1 of pulse frequency relationship calculates instantaneous flow:
F=aQ+b (formula 1)
Wherein, F is pulse frequency, and Q is the flow of unit time, and a, b are constant.It can be calculated time W (namely half of arteries and veins
Rush the signal period) in instantaneous flow, by following equation 4:
Q=(F-b)/a=(1/ (2W)-b)/a.(formula 4)
After calculating instantaneous flow, the subtotal flow in the time interval need to be further calculated.
Step S23 obtains the subtotal stream with the multiple of the time interval and the pulsewidth multiplied by the instantaneous flow
Amount.
So the subtotal flow in time interval t (1 second) can have formula 5 below to calculate and obtain:
Q '=(t/W) * Q=(t/W) * (1/ (2W)-b)/a (formula 5)
As shown from the above formula, subtotal flow is not to add up and obtain, but utilize pulse signal in the time interval
The characteristic that frequency remains unchanged directly is obtained by instantaneous flow multiplied by a multiple, this multiple is between the setting time
Exclude the multiple obtained with the pulsewidth.
Step S3:
In this step, each subtotal flow in a flow process to fluid is needed to add up, obtains total stream
Amount.Still to be divided between setting time 1 second, process fluid flow is for 10 seconds, therefore, it is desirable to be carried out ten subtotal flows tired
Add or sum, obtains total flow.
Due to being not aware that when process fluid flow terminates in advance, in this step, need to subtotal stream
Amount adds up, as soon as that is, obtain a subtotal flow, add up with current total flow, update and current adds up to flow
Value, until detecting that process fluid flow terminates, using current total flow value for being stored at the end of process fluid flow as
Total flow value of secondary process fluid flow.
It can also include step S4 in one exemplary embodiment of the disclosure, effect is to realize fluid automatic cut out
(or shutdown), such as can realize and open automatic water receiving after water receiving switchs, water receiving switch is automatically closed after filling.It in this way can be with
Convenient for the user to operate, user can not have to fall into a long wait.As shown in figure 5, step S4 includes several sub-steps, introduce respectively such as
Under:
Step S41: a capability value is obtained；
In this step, user can be allowed to input a capacity information, swept by modes such as barcode scanning, key selections
When code, can be sticked the bar code comprising capacity information or two dimensional code etc. on the implements such as cup.Here capacity, can be use
The cup capacity of family ordinary practice, rather than the maximum capacity of cup.
Step S42: judging whether the current value of total flow is more than or equal to the setting flow value, continues to sentence Ru no
It is disconnected.
After user's operation water receiving switch, flowmeter starting is detected the flow of this fluid flowing, described in judgement
Whether the current value of total flow is more than or equal to the setting flow value, thens follow the steps S43 in this way, continues to judge Ru no, i.e.,
It is back to step S42.
Step S43: triggering one is for making the signal of the fluid cutout.
When the judging result of step S42, which is, is, step S43 is executed, triggering one is used to make the signal of the fluid cutout,
Such as water receiving switch is automatically closed, cup fills automatically, and user can at the convenient time take.
It can also include step S5 in the yet another exemplary embodiment of the disclosure, effect is to realize that the service life of filter core is pre-
It is alert, it prompts user to prepare the filter core of replacement in advance, uses upper inconvenience in order to avoid bringing.It can also be by this step, while to more
The service life of a filter core carries out early warning.
The flow rate testing methods of the disclosure can include above-mentioned step S4 and step S5, can also only include step simultaneously
Rapid one of S4 and step S5.
As shown in fig. 6, step S5 includes several sub-steps, it is described below respectively:
Step S51 obtains the filtering water maximum value of a filter core；
Namely maximum filtering water corresponding to filter element life is obtained, lead to after can inputting or being packed into filter core when being packed into filter core
Detection is crossed to obtain.
Step S52 accumulates each total flow of the filter core from after using as aggregate flow；
Namely accumulation is from each total flow of each secondary water flow flow process after the filter core use, equally, in this step
In, need to add up to total flow, as soon as that is, obtain a total flow, add up with current aggregate flow, more
New current aggregate flow value.
Step S53, judges whether the aggregate flow is greater than a setting percentage of the filtering water maximum value, such as no
Continue to judge；
After the filter core comes into operation, the aggregate flow of the filter core is judged, namely total stream
Whether the current value of amount is more than or equal to a setting percentage of the filtering water, thens follow the steps S54 in this way, continues to sentence Ru no
It is disconnected, that is, it is back to step S53；The value of the percentage can be set according to concrete conditions such as the projected lives of filter core, such as can
For 95-98%.
Step S54 triggers the signal that service life early warning is carried out to the filter core.
When the judging result of step S53, which is, is, step S54, the progress service life early warning of a pair of filter core of triggering are executed
Signal, such as carry out voice signal or show the early warning of information, user is reminded to prepare or the filter core that more renews.
Introduce the flow detector of disclosure exemplary embodiment again below.
Fig. 7 is a kind of flow detector shown according to an exemplary embodiment.Referring to Fig. 7, the flow detection dress
It sets including detection module 11, computing module 12 and conversion module 13.
Detection module 11 is at set time intervals, detecting the pulse signal that the sensor of the flowmeter is issued
Pulsewidth；.
Computing module 12 is used to calculate the subtotal flow in the time interval according to the pulsewidth；
Total module 13 is for adding up to each subtotal when stopping from fluid by flowmeter to fluid by the flowmeter
Flow obtains total flow.
As shown in figure 8, in detection module 11, including detection unit 111, timer 112 and time interval setup unit
113, detection unit 111 is used to detect the rising edge of the pulse signal and detects the failing edge of the pulse signal, timer
112 pairs detect that the duration of rising edge to the failing edge for detecting the pulse signal of the pulse signal carries out timing to make
For the pulsewidth.Time interval setup unit 113 in detection unit 11, the time interval of setting can be one second.
As shown in figure 9, computing module includes frequency computing unit 121, instantaneous flow calculating unit 122 and subtotal unit
123.Wherein, frequency computing unit 121, for calculating the frequency of the pulse signal according to the pulsewidth；Instantaneous flow calculates
Unit 122, corresponding relationship and frequency computing unit 121 for flow and pulse signal frequency according to the flowmeter transmit
The frequency, obtain half of pulse signal cycle in instantaneous flow, send subtotal unit 123 to；Subtotal unit 123 is used for
The instantaneous flow that unit 122 transmits is calculated multiplied by instantaneous flow with the multiple of the time interval and the pulsewidth, is obtained
Subtotal flow in the setting time interval, and send total module 13 to, total flow is obtained with cumulative.
As shown in Figure 10, adding up to module 13 includes storage unit 131 and total unit 132, and storage unit 131 therein is used
In the subtotal flow that storage is transmitted according to subtotal unit 123, and according to current total flow of the subtotal flow rate calculation；Currently
The initial value of total flow is set as 0.And total unit 132, then for and the subtotal flow that transmits of subtotal unit 123 with deposit
Current total flow of the storage of storage unit 131 is added up and updates currently total flow, and currently adds up to stream for updated
Amount is stored in storage unit 131.This cumulative process is flowed until detecting that this flow process of fluid terminates with fluid
Current total total flow of the flow as this process fluid flow stored in storage unit 131 at the end of process.
As described in Figure 11, the flow detection module of the disclosure may also include automatic cut out module 14, automatically shut down flow module
14 are connected to total module 13, and automatic cut out module 14 includes input unit 141, comparing unit 142 and signal trigger unit
143。
Wherein, input unit 141, for receiving a setting flow value；And comparing unit 142, for relatively more total module
Whether current total flow that 13 total unit 132 is transmitted is more than or equal to the setting flow value, continues to compare Ru no；
It is in this way then send comparison result to signal trigger unit 143, the signal that the triggering of signal trigger unit 143 one makes fluid stop.
As described in Figure 12, the flow detector of the disclosure may also include warning module 15, and warning module 15 includes input
Unit 151 amounts to unit 152, judging unit 153 and prewarning unit 154.Wherein, input unit 151, for receiving a filter core
Filtering water maximum value；Unit 152 is amounted to, each conjunction sent for accumulating the filter core from total module 13 after use
Flow is counted as aggregate flow；And judging unit 153, then for judging whether the aggregate flow is greater than the filtering water most
The setting percentage being worth greatly；If otherwise continued to judge, judging result is then sent to prewarning unit 154 in this way.Prewarning unit
154, it is connected to judging unit 153, the judging result for receiving judging unit 153 is when being, prewarning unit 154 is triggered to described
The signal of filter core progress service life early warning.
During above-mentioned flow detection, it is respectively necessary for through subtotal unit 123, total unit 132 and amounts to unit
152 carry out the calculating of flow step by step, and subtotal unit 123, total unit 132 and the data transmission amounted between unit 152 are such as schemed
Shown in 13.
The flow detector of the disclosure, can include above-mentioned automatic cut out module 14 and warning module 15 simultaneously,
It can only include one of automatic cut out module 14 and warning module 15.
About the device in above-described embodiment, wherein modules execute the concrete mode of operation in related this method
Embodiment in be described in detail, no detailed explanation will be given here.
Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to its of the disclosure
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the disclosure, these modifications, purposes or
Person's adaptive change follows the general principles of this disclosure and including the undocumented common knowledge in the art of the disclosure
Or conventional techniques.The description and examples are only to be considered as illustrative, and the true scope and spirit of the disclosure are by following
Claim is pointed out.
Claims (13)
1. a kind of flow rate testing methods, be used for flowmeter, which is characterized in that the flow rate testing methods comprising steps of
At set time intervals, the pulsewidth for the pulse signal that the sensor of the flowmeter is issued is detected；
According to the pulsewidth, the subtotal flow in the time interval is calculated；And
It is total to stop each subtotal flow by the flowmeter by flowmeter to fluid from fluid, obtain total flow.
2. flow rate testing methods according to claim 1, which is characterized in that at set time intervals, detect the stream
In the step of pulsewidth for the pulse signal that the sensor of meter is issued, to detect the rising edge of the pulse signal to detection
To the pulse signal failing edge duration as the pulsewidth.
3. flow rate testing methods according to claim 1, which is characterized in that at set time intervals, detect the stream
In the step of pulsewidth for the pulse signal that the sensor of meter is issued, the time interval is one second.
4. flow rate testing methods according to claim 1, which is characterized in that according to the pulsewidth, calculate between the time
Every the interior subtotal flow the step of, comprising:
The frequency of the pulse signal is obtained by the pulsewidth；
By the flow of the flowmeter and the corresponding relationship of the pulse signal frequency, the wink in half of pulse signal cycle is obtained
Shi Liuliang；And
With the multiple of the time interval and the pulsewidth multiplied by the instantaneous flow, the subtotal flow is obtained.
5. flow rate testing methods according to claim 1, which is characterized in that the flow rate testing methods further include step,
Obtain a setting flow value；
Judge whether the current value of total flow is more than or equal to the setting flow value, continues to judge Ru no；It is then
Signal of the triggering one for the fluid that stops.
6. flow rate testing methods according to claim 1, which is characterized in that the flow rate testing methods further include step,
Obtain the filtering water maximum value of a filter core；
Each total flow of the filter core from after using is accumulated as aggregate flow；
Judge whether the aggregate flow is greater than a setting percentage of the filtering water maximum value, continues to judge Ru no；It is
Then
Trigger the signal that service life early warning is carried out to the filter core.
7. a kind of flow detector, it to be used for flowmeter, which is characterized in that the flow detector includes:
Detection module, the arteries and veins for the pulse signal that the sensor at set time intervals, detecting the flowmeter is issued
It is wide；
Computing module, for calculating the subtotal flow in the time interval according to the pulsewidth；And
Total module, for adding up to each subtotal stream when stopping from fluid by the flowmeter to fluid by the flowmeter
Amount obtains total flow.
8. flow detector according to claim 7, which is characterized in that the detection module includes detection unit and meter
When device, the detection unit is used to detect the rising edge and failing edge of the pulse signal, and the timer is described to detecting
Duration of the rising edge to detection to the failing edge carries out timing using as the pulsewidth.
9. flow detector according to claim 8, which is characterized in that further include time interval in the detection unit
Setup unit, the time interval that the time interval setup unit is set is one second.
10. flow detector according to claim 7, which is characterized in that
The computing module includes:
Frequency computing unit calculates the frequency of the pulse signal according to the pulsewidth；
Instantaneous flow calculates unit, corresponding relationship and the frequency for flow and pulse signal frequency according to the flowmeter
The frequency that rate computing unit transmits calculates the instantaneous flow in half of pulse signal cycle；And
Subtotal unit, for, multiplied by the instantaneous flow, calculating the time with the multiple of the time interval and the pulsewidth
Subtotal flow in interval；
Total module, comprising:
Storage unit, for storing the current total flow obtained according to the subtotal flow rate calculation that the subtotal unit transmits；
Current total flow of total unit, subtotal flow and storage unit storage for transmitting to the subtotal unit carries out
It adds up and updates currently total flow, and currently flow is added up to be stored in the storage unit for updated.
11. flow detector according to claim 7, which is characterized in that the flow detector further includes automatic
Stop module, is connected to total module, the module that automatically shuts down includes:
Input unit, for receiving a setting flow value；
Whether comparing unit, the current total flow transmitted for total module are more than or equal to the setting flow
Value, currently whether total flow is more than or equal to the setting flow value；And
Signal trigger unit makes the signal of the fluid cutout for triggering one.
12. flow detector according to claim 7, which is characterized in that the flow detector further includes early warning
Module, the warning module include:
Input unit, for receiving the filtering water maximum value of a filter core；
Unit is amounted to, is flowed for accumulating each total flow that total module of the filter core from after using transmits as total
Amount；
Judging unit, for judging whether the aggregate flow is greater than a setting percentage of the filtering water maximum value, directly
It is yes to judging result；And
Prewarning unit, is connected to the judging unit, and the judging result of the judging unit is when being, triggering to the filter core into
The signal of row service life early warning.
13. a kind of purifier, which is characterized in that the purifier includes any flow detection of claim 7-12
Device.
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| CN201410729346.5A CN104949720B (en) | 2014-12-03 | 2014-12-03 | Flow rate testing methods and device, purifier |
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| CN106915837B (en) * | 2015-12-28 | 2019-06-25 | 珠海格力电器股份有限公司 | Water purification system and filter element service life determining method thereof |
| CN106500783B (en) * | 2016-12-08 | 2023-04-21 | 深圳市锐能微科技有限公司 | Hydrothermal meter and water flow detection device thereof |
| CN107906751A (en) * | 2017-11-16 | 2018-04-13 | 合肥美的暖通设备有限公司 | Water tank cleans based reminding method and device |
| CN109932199B (en) * | 2019-03-22 | 2020-12-01 | 中国家用电器研究院 | Method for testing water purifier |
| CN110231074B (en) * | 2019-07-08 | 2021-11-30 | 无锡水表有限责任公司 | Method for rapidly detecting error of water meter |
| CN110354570B (en) * | 2019-07-22 | 2021-05-25 | 福建智恒优水科技有限公司 | Method and system for judging service life of filter element through water quality detector |
| CN110440866A (en) * | 2019-08-09 | 2019-11-12 | 佛山市顺德区美的饮水机制造有限公司 | Obtain method, apparatus, water purifier and the storage medium of fluid flow |
| CN114815719B (en) * | 2022-06-28 | 2022-09-27 | 江苏交科能源科技发展有限公司 | Vehicle-mounted ship pollutant intelligent receiving system and control method thereof |
| CN115290149A (en) * | 2022-10-08 | 2022-11-04 | 青岛鼎信通讯股份有限公司 | Metering signal filtering method applied to electronic remote water meter |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2313445A (en) * | 1996-05-23 | 1997-11-26 | Japan National Oil | Multiphase cross-correlation flowmeter |
| CN200979511Y (en) * | 2006-10-20 | 2007-11-21 | 叶建荣 | A flow sensor for a water purifier |
| CN101704601A (en) * | 2009-10-29 | 2010-05-12 | 朱鸽 | water purifier controller |
| CN201716043U (en) * | 2009-12-11 | 2011-01-19 | 北京工业大学 | High-sensitivity turbine flowmeter for automobile |
| CN201903372U (en) * | 2010-11-30 | 2011-07-20 | 深圳市博特朗科技有限公司 | Liquid flow sensor |
| CN202018310U (en) * | 2011-03-06 | 2011-10-26 | 烟台真子工贸有限公司 | Pulse flowmeter |
| US8181512B2 (en) * | 2010-03-18 | 2012-05-22 | Ching-Chih Yu | Timing device having a flow control function |
-
2014
- 2014-12-03 CN CN201410729346.5A patent/CN104949720B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2313445A (en) * | 1996-05-23 | 1997-11-26 | Japan National Oil | Multiphase cross-correlation flowmeter |
| CN200979511Y (en) * | 2006-10-20 | 2007-11-21 | 叶建荣 | A flow sensor for a water purifier |
| CN101704601A (en) * | 2009-10-29 | 2010-05-12 | 朱鸽 | water purifier controller |
| CN201716043U (en) * | 2009-12-11 | 2011-01-19 | 北京工业大学 | High-sensitivity turbine flowmeter for automobile |
| US8181512B2 (en) * | 2010-03-18 | 2012-05-22 | Ching-Chih Yu | Timing device having a flow control function |
| CN201903372U (en) * | 2010-11-30 | 2011-07-20 | 深圳市博特朗科技有限公司 | Liquid flow sensor |
| CN202018310U (en) * | 2011-03-06 | 2011-10-26 | 烟台真子工贸有限公司 | Pulse flowmeter |
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