CN108254105A - Pressure detection method and its application - Google Patents
Pressure detection method and its application Download PDFInfo
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- CN108254105A CN108254105A CN201810012069.4A CN201810012069A CN108254105A CN 108254105 A CN108254105 A CN 108254105A CN 201810012069 A CN201810012069 A CN 201810012069A CN 108254105 A CN108254105 A CN 108254105A
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- 238000001514 detection method Methods 0.000 title claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 238000004891 communication Methods 0.000 claims description 16
- 238000005070 sampling Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000013500 data storage Methods 0.000 claims description 2
- 230000002528 anti-freeze Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 11
- 230000006978 adaptation Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000013075 data extraction Methods 0.000 description 2
- 238000013499 data model Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000002123 temporal effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
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- 238000000151 deposition Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/18—Measuring force or stress, in general using properties of piezo-resistive materials, i.e. materials of which the ohmic resistance varies according to changes in magnitude or direction of force applied to the material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/26—Auxiliary measures taken, or devices used, in connection with the measurement of force, e.g. for preventing influence of transverse components of force, for preventing overload
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- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a kind of pressure detection methods, using the pressure-detecting device of this pressure detection method, and pressure-detecting device is applied on water pump, it, which has, overcomes temperature to influence, improve the advantage of accuracy of detection and reliability, its key points of the technical solution are that pass through set temperature sensor and pressure sensor, by controller, to the two, collected temperature value and pressure value calculate, it will be on temperature error compensation to pressure value, to improve the reliability of pressure detecting and accuracy, the startup and stopping of water pump can be controlled to the detection of water temperature, Auto Power On is carried out at 0 degree Celsius for a period of time with antifreeze, it is shut down at 100 degrees Celsius or more.
Description
Technical field
The present invention relates to technical field of pressure detection, more particularly to a kind of pressure detection method, using this pressure detecting side
The pressure-detecting device of method, and pressure-detecting device is applied on water pump.
Background technology
In pumping plant, it will usually which pressure sensor is set to check water pump hydraulic pressure, in order to water pump system
System, which is made, to be more preferably more accurately controlled.
Pressure sensor in the market can generate inevitable error in the production process, this leads to static parameter feature
Actual measured value deviation, and the relevant parameter of the undistorted conversion requirements sensor of signal occurs（Such as zero, sensitivity, non-
It is linear etc.）Certain required precision must be reached, therefore it is necessary to proving operation is implemented to pressure sensor, it is true to obtain
Performance parameter.
Since environmental factor can have an impact pressure sensor, lead to pressure sensor after a period of time is placed, pass
The relevant parameter of sensor can also change, particular in that the variation of temperature, there is significantly the inspection output of pressure sensor
Influence.
The calibration of pressure sensor refers to：For the reference pressure value obtained, using the mark of an one high order of magnitude
Quasi- device, which is acted on, to be calibrated on sensor, so as to obtain the correspondence of its input and output.
Pressure sensor for water pump is piezoresistive pressure sensor, and the design of the sensor internal acquisition module is base
In piezoelectric effect manufacture, operation principle is：When the pressure core of pressure sensor experiences pressure, generation and pressure size
Resistance value so as to which electric bridge resistance value be made to change, by internal signal modulate circuit, is carried out conversion output by directly proportional micro-displacement
Corresponding normal pressure measured value.
Existing pressure sensor has certain temperature applicable range, is learnt by experiment, is fitted beyond its temperature
After range, there is deviation in the testing result of pressure sensor, pressure sensor due to temperature applicable range and by office
Limit, particularly in water pump application, some fluid temperature variations ranges of water pump transmission are larger, and general pressure sensor can go out
The deviation of existing testing result, causes prohibited data detection true.
Invention content
In view of the deficiencies of the prior art, the present invention intends to provide a kind of pressure detection method, using this pressure
The pressure-detecting device of power detection method, and pressure-detecting device is applied on water pump, have and temperature is overcome to influence, improve
The advantage of accuracy of detection and reliability.
The present invention above-mentioned technical purpose technical scheme is that：A kind of pressure detection method, packet
Pressure sensor, temperature sensor, memory and controller are included, is included the following steps：
Step 1：The pressure value at the first moment is obtained by pressure sensor, first moment is obtained by temperature sensor
Temperature value；
Step 2：The pressure value obtained in step 1 and temperature value are transmitted in memory and stored；
Step 3：Temperature drift coefficient, lower-limit temperature value, ceiling temperature value, pressure value, temperature value are transmitted to control by memory
In device；
Step 4：Data of the controller in memory judge the first moment temperature value whether in lower-limit temperature value and
Range between ceiling temperature value：
S41, when temperature is less than lower-limit temperature value TLower limitWhen, controller is calculated using equation below：U=(1-(T-TLower limit)*k)* Ug；
S42, when temperature is between lower-limit temperature value and ceiling temperature value, U=Ug；
S43, when temperature is more than ceiling temperature value TThe upper limitWhen, controller is calculated using equation below：U=(1-(T-TThe upper limit)*k)* Ug；
In above formula, U is by the pressure value after temperature-compensating, and T is the Current Temperatures numerical value obtained in step 1, and Ug is in step 1
The pressure value of acquisition, k are temperature drift coefficient, and T benchmark are the reference temperature value pre-set in memory；
Step 5：Being conveyed into memory by the pressure value after temperature-compensating of obtaining of step 4 is stored.
By above-mentioned setting, the pressure data of the temperature at this moment and this moment is compared, by formula by temperature
Temperature-compensating is carried out to the data of pressure detecting, the numerical value after compensation is more accurate；And data before and after compensation can be remembered
It is traced and is adjusted as historical data after record.
Can be preferably as concrete scheme of the invention：The acquisition modes of temperature value in the step 1 include：
Multiple single temperature values are obtained in the equidistant range of pressure sensor, and are gone out averagely according to all single Temperature numerical calculations
It is worth the temperature value as the first moment.
By above-mentioned setting, in order to improve the reliability of temperature value acquisition, multiple pressure are acquired simultaneously by this moment
Multiple temperature values of sensor proximity are calculated, and avoid the one-sidedness of single temperature value so that temperature value is more
Meet variation tendency, more can really reflect temperature conditions.Because temperature change is a space heating power radiation and time transition
Change procedure, will not jump bust, it is possible thereby to the more accurate temperature for embodying detection.
Can be preferably as concrete scheme of the invention：The acquisition modes of temperature value in the step 1 include：Root
According to the temperature value at n moment after n moment before the first moment and the first moment, average value is calculated as the first new moment
Temperature value.
It is temporal variation based on temperature change by above-mentioned setting, therefore by acquiring the temperature number at each moment
Value, and pass through the temperature changing regularity at adjacent front and rear several moment, its average value is taken alternatively, then can be more close to temperature
Variation tendency, and avoid some bad data points, so-called bad data points refer to：In data acquisition, due to hardware or outside
Other factors interference causes apparent bigger than normal or less than normal, the ivory-towered data information of data.
Can be preferably as concrete scheme of the invention：2n+1 temperature value is excluded into a maximum value and a minimum
Value calculates temperature value of the average value of a temperature values of 2n-2a+1 as the first new moment, 2n-2a+1>1.
By above-mentioned setting, temperature value is further investigated, further improves the reliability of temperature data, and effectively
Some temperature bad points are rejected, to reduce annoyance level of the wrong data to Whole Data Model.
Can be preferably as concrete scheme of the invention：Before step 1, the temperature sampling frequency of set temperature sensor
Rate.
By above-mentioned setting, by the setting to temperature sampling frequency, the quantity of temperature value can be improved, convenient for more
Accurately temperature is acquired and fed back.
Can be preferably as concrete scheme of the invention：Ceiling temperature value T in step 3The upper limitWith lower-limit temperature value TLower limit
It is modified according to the conduction time of pressure sensor, when conduction time length t is more than b, takes the quotient m, T1=T of t divided by bThe upper limit-
Cm, T2=TLower limit+cm。
By above-mentioned setting, primarily to service life is overcome, to the ceiling temperature value of pressure sensor and lower limit temperature
The problem of angle value creates an impression and can not adjust carries out timing, so as to according to service life feelings using the energization period of pressure sensor
Condition is adjusted ceiling temperature value and lower-limit temperature value, improves detection reliability.
A kind of pressure-detecting device, including pressure sensor, temperature sensor, memory and controller, the pressure passes
Sensor connects controller, for obtaining the pressure value at the first moment, and passes to controller and memory；The temperature passes
Sensor connects controller, for obtaining the temperature value at first moment, and passes to controller and memory；Controller
Memory is connected, for calling temperature drift coefficient, lower-limit temperature value, ceiling temperature value, pressure value, the temperature number in memory
Whether value judges the temperature value at the first moment in the range between lower-limit temperature value and ceiling temperature value：
S41, when temperature is less than lower-limit temperature value TLower limitWhen, controller is calculated using equation below：U=(1-(T-TLower limit)*k)* Ug；
S42, when temperature is between lower-limit temperature value and ceiling temperature value, U=Ug；
S43, when temperature is more than ceiling temperature value TThe upper limitWhen, controller is calculated using equation below：U=(1-(T-TThe upper limit)*k)* Ug；
In above formula, U is by the pressure value after temperature-compensating, and T is the Current Temperatures numerical value obtained in step 1, and Ug is in step 1
The pressure value of acquisition, k are temperature drift coefficient, and T benchmark are the reference temperature value pre-set in memory；And by new data
It stores in memory.
By above-mentioned setting, by the way that above-mentioned method is applied on pressure-detecting device, so as to fulfill the detection of pressure,
This is detected so that pressure and temperature acquires, and pressure value will be compensated simultaneously, and compensation way is according to temperature change feelings
Condition carries out, so as to improve the reliability of pressure detecting.
Can be preferably as concrete scheme of the invention：A kind of water pump, including above-mentioned pressure-detecting device, the pressure
Memory in force checking device is connected with host computer, and the host computer is used to show temperature drift coefficient, lower-limit temperature value, upper limit temperature
Angle value, pressure value, temperature value.
By above-mentioned setting, above-mentioned pressure-detecting device is applied on water pump, and by connecting host computer so that
Data can be showed intuitively, personnel control easy to operation and debugging.
Can be preferably as concrete scheme of the invention：The host computer has and the RS485 of external device communication leads to
Believe interface.
By above-mentioned setting, using RS485 communication interfaces, communication and data extraction can be carried out with external equipment and is repaiied
Change.
Can be preferably as concrete scheme of the invention：The RS485 communication interfaces are also associated with USB converter, USB
Converter is used to RS485 communication interfaces switching to USB interface.
By above-mentioned setting, in order to improve the adaptation issues of operation convenience degree and connection, can use RS485 interfaces and
USB interface is attached.
In conclusion having the beneficial effect that in contrast to the prior art of the invention：By formula by temperature to pressure detecting
Data carry out temperature-compensating, and the numerical value after compensation is more accurate；And history is used as after being recorded to data before and after compensation
Data are traced and are adjusted.Temperature acquisition is relatively reliable.
Description of the drawings
Fig. 1 is the block diagram of embodiment 2；
Fig. 2 is the block diagram of embodiment 3.
Reference numeral：1st, pressure sensor；2nd, temperature sensor；3rd, memory；4th, controller；5th, host computer；6、RS485
Communication interface；7th, USB converter.
Specific embodiment
The present invention is described in further detail below in conjunction with attached drawing.
Embodiment 1：
A kind of pressure detection method, the hardware of use have pressure sensor 1, temperature sensor 2, memory 3 and controller 4, packet
Include following steps：
Step 1：The pressure value at the first moment is obtained by pressure sensor 1, the first moment was obtained by temperature sensor 2
Temperature value；First moment was a certain moment in detection process, was not refered in particular to, by taking the detection duration of 1 hour as an example, when first
Pointer body can be with some time point in 1 hour thus.For temperature and pressure detection, temperature value and pressure value
Inspection amount with detect frequency dependence, before step 1, can be with the temperature sampling frequency of set temperature sensor 2.By to temperature
The setting of sample frequency is spent, the quantity of temperature value can be improved, convenient for being more accurately acquired and feeding back to temperature.When
It is per minute for 60 to detect frequency, then is one second temperature value and pressure value.Then the temperature value amount of 1 hour is 360,
Pressure value amount is 360.Certainly, pressure value at this time does not process also.
Step 2：The pressure value obtained in step 1 and temperature value are transmitted in memory 3 and stored；Above-mentioned
In temperature value and all data storages to memory 3 of pressure value, it any can call to read and rewrite and replace.
Step 3：Temperature drift coefficient, lower-limit temperature value, ceiling temperature value, pressure value, temperature value are transmitted to by memory 3
In controller 4, pressure sensor 1 uses pressure resistance type, and for temperature drift coefficient 0.01, lower-limit temperature value, ceiling temperature value are following
Statement in statement can be：TLower limit、TThe upper limit。
Step 4：Whether data of the controller 4 in memory 3 judge the temperature value at the first moment in lower limit temperature
Range between angle value and ceiling temperature value：
S41, when temperature is less than lower-limit temperature value TLower limitWhen, controller 4 is calculated using equation below：U=(1-(T-TLower limit)*k)*
Ug；
S42 when temperature is between lower-limit temperature value and ceiling temperature value, can be equal to lower-limit temperature value and ceiling temperature
Value, U=Ug；
S43, when temperature is more than ceiling temperature value TThe upper limitWhen, controller 4 is calculated using equation below：U=(1-(T-TThe upper limit)*k)*
Ug；
In above formula, U is by the pressure value after temperature-compensating, and T is the Current Temperatures numerical value obtained in step 1, and Ug is in step 1
The pressure value of acquisition, k are temperature drift coefficient, and T benchmark are the reference temperature value being set in advance in memory 3.
Step 5：Being conveyed into memory 3 by the pressure value after temperature-compensating of obtaining of step 4 is stored.
The pressure data of the temperature at this moment and this moment is compared, by formula by temperature to the number of pressure detecting
According to temperature-compensating is carried out, the numerical value after compensation is more accurate；And history number is used as after being recorded to data before and after compensation
According to being traced and adjusted.
Further preferred for above-mentioned method, the acquisition modes of the temperature value in step 1 include：In pressure sensor
It obtains multiple single temperature values in 1 equidistant range, and goes out average value as the according to all single Temperature numerical calculations
The temperature value at one moment.Pressure sensor 1 is arranged on centre position, and temperature sensor 2 is circumferentially distributed in pressure sensor 1
Around, and be uniformly distributed.Such as shown in Fig. 1, temperature sensor 2 sets four, and four temperature sensors 2 are wired to pros
Shape, and pressure sensor 1 is in cornerwise intersection point.
In order to improve the reliability of temperature value acquisition, acquired simultaneously near multiple pressure sensors 1 by this moment
Multiple temperature values are calculated, and avoid the one-sidedness of single temperature value so that and temperature value is more in line with variation tendency,
It more can really reflect temperature conditions.Because temperature change is the change procedure of a space heating power radiation and time transition, will not
Jump bust, it is possible thereby to the more accurate temperature for embodying detection.
Another improved procedure for the above method is：The acquisition modes of temperature value in step 1 include：According to
Before one moment after n moment and the first moment n moment temperature value, calculate temperature of the average value as the first new moment
Number of degrees value.At least second moment point in the range of the first moment to detection time at this time, the data sampled such as second second,
N is the integer more than 0.
It is temporal variation based on temperature change, therefore by acquiring the temperature value at each moment, and passes through adjacent
The temperature changing regularity at front and rear several moment, take its average value alternatively, then can more close to the variation tendency of temperature, and
And some bad data points are avoided, so-called bad data points refer to：In data acquisition, since hardware or external other factors interference are made
Into apparent bigger than normal or less than normal, the ivory-towered data information of data.
2n+1 temperature value is excluded into a maximum value and a minimum value, calculates a temperature values of 2n-2a+1
Temperature value of the average value as the first new moment, 2n-2a+1>1.A is the integer more than 0.
Temperature value is further investigated, further improves the reliability of temperature data, and effectively rejects some temperature
Bad point, to reduce annoyance level of the wrong data to Whole Data Model.
Based on the above method, further to the ceiling temperature value T in step 3The upper limitWith lower-limit temperature value TLower limitIt is passed according to pressure
The conduction time of sensor 1 modifies, and when conduction time length t is more than b, takes the quotient m, T1=T of t divided by bThe upper limit- cm, T2=TLower limit+
cm.Primarily to overcome service life, create an impression to the ceiling temperature value and lower-limit temperature value of pressure sensor 1 and can not
The problem of adjusting, using pressure sensor 1 energization period carry out timing, so as to according to life situations to ceiling temperature value and under
Limit temperature value is adjusted, and improves detection reliability.Such as：Accumulative conduction time is 1.5 years, and b is 1 year, and c is allowance for depreciation, c
It is 10, TLower limitIt is 10 DEG C, TThe upper limit80 DEG C of position, m is 1 at this time, replaced T1=70 DEG C, T2=20 DEG C.
Embodiment 2：
A kind of pressure-detecting device, as shown in Figure 1, based on above-mentioned implementation, including pressure sensor 1, temperature sensor 2,
Memory 3 and controller 4, pressure sensor 1 connect controller 4, for obtaining the pressure value at the first moment, and pass to control
Device 4 and memory 3 processed；
Temperature sensor 2 connects controller 4, for obtaining the temperature value at the first moment, and passes to controller 4 and storage
Device 3；
Controller 4 connects memory 3, for calling temperature drift coefficient in memory 3, lower-limit temperature value, ceiling temperature value, pressure
Numerical value, temperature value.
Judge the temperature value at the first moment whether in the range between lower-limit temperature value and ceiling temperature value：S41, when
Temperature is less than lower-limit temperature value TLower limitWhen, controller 4 is calculated using equation below：U=(1-(T-TLower limit)*k)* Ug；
S42, when temperature is between lower-limit temperature value and ceiling temperature value, U=Ug；
S43, when temperature is more than ceiling temperature value TThe upper limitWhen, controller 4 is calculated using equation below：U=(1-(T-TThe upper limit)*k)*
Ug；
In above formula, U is by the pressure value after temperature-compensating, and T is the Current Temperatures numerical value obtained in step 1, and Ug is in step 1
The pressure value of acquisition, k are temperature drift coefficient, and T benchmark are the reference temperature value being set in advance in memory 3；And by new number
According in storage to memory 3.
By the way that above-mentioned method is applied on pressure-detecting device, so as to fulfill the detection of pressure, this is detected so that pressure
Power and temperature acquire simultaneously, and pressure value will be compensated, and compensation way is carried out according to temperature variations, so as to carry
The reliability of high pressure detection.
Embodiment 3：
A kind of water pump, based on embodiment 1, as shown in Fig. 2, including above-mentioned pressure-detecting device, depositing in pressure-detecting device
Reservoir 3 is connected with host computer 5, and host computer 5 is used to show temperature drift coefficient, lower-limit temperature value, ceiling temperature value, pressure value, temperature
Number of degrees value.Host computer 5 can be microcontroller 4 or display or PC machine etc..
Above-mentioned pressure-detecting device is applied on water pump, and by connecting host computer 5 so that data can be straight
That sees shows, personnel control easy to operation and debugging.
Host computer 5 has and the RS485 communication interfaces 6 of external device communication.Using RS485 communication interfaces 6, can with it is outer
Portion's equipment carries out communication and data extraction and changes.RS485 communication interfaces 6 are also associated with USB converter 7, and USB converter 7 is used
In RS485 communication interfaces 6 are switched to USB interface.In order to improve the adaptation issues of operation convenience degree and connection, Ke Yiyong
RS485 interfaces and USB interface are attached.The startup and stopping of water pump can be controlled to the detection of water temperature, in 0 degrees centigrade
When, carry out Auto Power On for a period of time so that water pump starts to preheat, antifreeze so as to achieve the effect that.It is right at 100 degrees Celsius or more
Water pump integrally carries out shutdown work.
The above be only the present invention exemplary embodiment, protection domain and is not intended to limit the present invention, this hair
Bright protection domain is determined by appended claim.
Claims (10)
1. a kind of pressure detection method, including pressure sensor (1), temperature sensor (2), memory (3) and controller (4),
It is characterized by comprising following steps：
Step 1：The pressure value at the first moment is obtained by pressure sensor (1), described the is obtained by temperature sensor (2)
The temperature value at one moment；
Step 2：The pressure value obtained in step 1 and temperature value are transmitted in memory (3) and stored；
Step 3：Temperature drift coefficient, lower-limit temperature value, ceiling temperature value, pressure value, temperature value are transmitted to control by memory (3)
In device (4) processed；
Step 4：Whether data of the controller (4) in memory (3) judge the temperature value at the first moment in lower limit temperature
Range between angle value and ceiling temperature value：
S41, when temperature is less than lower-limit temperature value TLower limitWhen, controller (4) is calculated using equation below：U=(1-(T-TLower limit)*k)*
Ug；
S42, when temperature is between lower-limit temperature value and ceiling temperature value, U=Ug；
S43, when temperature is more than ceiling temperature value TThe upper limitWhen, controller (4) is calculated using equation below：U=(1-(T-TThe upper limit)*k)*
Ug；
In above formula, U is by the pressure value after temperature-compensating, and T is the Current Temperatures numerical value obtained in step 1, and Ug is in step 1
The pressure value of acquisition, k are temperature drift coefficient, and T benchmark are the reference temperature value being set in advance in memory (3)；
Step 5：Being conveyed into memory (3) by the pressure value after temperature-compensating of obtaining of step 4 is stored.
2. pressure detection method according to claim 1, it is characterised in that：The acquisition of temperature value in the step 1
Mode includes：Multiple single temperature values are obtained in the equidistant range of pressure sensor (1), and according to all single temperature
Numerical computations go out temperature value of the average value as the first moment.
3. pressure detection method according to claim 1, it is characterised in that：The acquisition of temperature value in the step 1
Mode includes：According to the temperature value at n moment after n moment before the first moment and the first moment, average value conduct is calculated
The temperature value at the first new moment.
4. pressure detection method according to claim 3, it is characterised in that：2n+1 temperature value is excluded into a maximum
Value and a minimum value calculate temperature value of the average value of a temperature values of 2n-2a+1 as the first new moment, 2n-
2a+1>1。
5. pressure detection method according to claim 4, it is characterised in that：Before step 1, set temperature sensor
(2) temperature sampling frequency.
6. pressure detection method according to claim 1, it is characterised in that：Ceiling temperature value T in step 3The upper limitAnd lower limit
Temperature value TLower limitIt is modified according to the conduction time of pressure sensor (1), when conduction time length t is more than b, takes t's divided by b
Quotient m, T1=TThe upper limit- cm, T2=TLower limit+cm。
7. a kind of pressure-detecting device, including pressure sensor (1), temperature sensor (2), memory (3) and controller (4),
It is characterized in that：
Pressure sensor (1) the connection controller (4), for obtaining the pressure value at the first moment, and passes to controller
(4) and memory (3)；
Temperature sensor (2) the connection controller (4), for obtaining the temperature value at first moment, and passes to control
Device (4) processed and memory (3)；
Controller (4) connection memory (3), for calling temperature drift coefficient, lower-limit temperature value, the ceiling temperature in memory (3)
Value, pressure value, temperature value,
Judge the temperature value at the first moment whether in the range between lower-limit temperature value and ceiling temperature value：
S41, when temperature is less than lower-limit temperature value TLower limitWhen, controller (4) is calculated using equation below：U=(1-(T-TLower limit)*k)*
Ug；
S42, when temperature is between lower-limit temperature value and ceiling temperature value, U=Ug；
S43, when temperature is more than ceiling temperature value TThe upper limitWhen, controller (4) is calculated using equation below：U=(1-(T-TThe upper limit)*k)*
Ug；
In above formula, U is by the pressure value after temperature-compensating, and T is the Current Temperatures numerical value obtained in step 1, and Ug is in step 1
The pressure value of acquisition, k are temperature drift coefficient, and T benchmark are the reference temperature value being set in advance in memory (3)；
It and will be in new data storage to memory (3).
8. a kind of water pump, which is characterized in that including pressure-detecting device as claimed in claim 7, the pressure-detecting device
In memory (3) be connected with host computer (5), the host computer (5) is for showing temperature drift coefficient, lower-limit temperature value, upper limit temperature
Angle value, pressure value, temperature value.
9. water pump according to claim 8, which is characterized in that the host computer (5) has and external device communication
RS485 communication interfaces (6).
10. water pump according to claim 9, which is characterized in that the RS485 communication interfaces (6) are also associated with USB conversions
Device (7), USB converter (7) by RS485 communication interfaces (6) for switching to USB interface.
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| CN201810012069.4A CN108254105A (en) | 2018-01-05 | 2018-01-05 | Pressure detection method and its application |
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| CN201810012069.4A CN108254105A (en) | 2018-01-05 | 2018-01-05 | Pressure detection method and its application |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109489898A (en) * | 2018-12-20 | 2019-03-19 | 中国电子科技集团公司第四十八研究所 | A kind of pressure-measuring system and measurement method |
| CN109855356A (en) * | 2019-01-04 | 2019-06-07 | 青岛海尔股份有限公司 | Evaporimeter frosting degree judgment method in refrigerator and refrigerator |
| CN112763136A (en) * | 2021-04-08 | 2021-05-07 | 南京英锐创电子科技有限公司 | Power battery pack pressure alarm system and alarm method |
| CN116412860A (en) * | 2023-06-12 | 2023-07-11 | 深圳市鑫精诚传感技术有限公司 | Multifunctional test system |
| CN116952449A (en) * | 2023-07-27 | 2023-10-27 | 宁波得盛微纳智能科技有限公司 | Underwater pressure detection method and system |
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