CN108254105A - Pressure detection method and its application - Google Patents

Pressure detection method and its application Download PDF

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Publication number
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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China
Prior art keywords
temperature
value
pressure
temperature value
moment
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张灵辉
陈建国
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Taizhou Phaeton Pump Industry Ltd Co
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Taizhou Phaeton Pump Industry Ltd Co
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Priority to CN201810012069.4A priority Critical patent/CN108254105A/en
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00Measuring force or stress, in general
    • G01L1/18Measuring 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
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01LMEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00Measuring force or stress, in general
    • G01L1/26Auxiliary 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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  • Physics & Mathematics (AREA)
  • 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

Pressure detection method and its application
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.
CN201810012069.4A 2018-01-05 2018-01-05 Pressure detection method and its application Pending CN108254105A (en)

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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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