CN102404987A

CN102404987A - A sensor profile adjuster

Info

Publication number: CN102404987A
Application number: CN2009801587886A
Authority: CN
Inventors: 冯锦祥; 叶宁
Original assignee: Mimos Bhd
Current assignee: Mimos Bhd
Priority date: 2009-02-19
Filing date: 2009-12-21
Publication date: 2012-04-04
Anticipated expiration: 2029-12-21
Also published as: WO2010095920A1; CN102404987B

Abstract

A sensor profile adjusting module (10) where a method of adjusting and converting sensor readings in an agricultural management system (20) is provided, where the method includes the steps of receiving sensor data from sensor, determining if sensor data packet contains moisture, retrieving moisture reading from data packet, retrieving dependent constants based on moisture reading or calculating drift value based on lab research for each sensor and storing data in the system (20) database and displaying in a user interface.

Description

Sensor characteristics curve adjuster

Technical field

The present invention relates to a kind of sensor characteristics curve adjuster, relate more specifically to a kind of also method of conversion sensor data readings of in the agricultural management system, adjusting.

Background technology

For modern agriculture, accuracy and skillfully be primary.Maintenance is write down exactly and the accurate data collection has all become the key factor of improving whole agricultural system.The agricultural system of most of operations has a plurality of sensors that between operational period, are used to monitor a plurality of parameters in order to control purpose.

In some cases, the sensor in the said system may reduce the accuracy of reading or inaccurate reading is provided.The further use of the data that these are wrong may cause the conclusion about the mistake of the system in using.Otherwise failure condition may not be detected perhaps, and pseudo-fault may be sent unnecessary warning to the user by report.This type of incident can cause enormous economic loss and potential danger.

Therefore need to propose a solution, make its inaccuracy in can the compensation sensor hardware system, to guarantee that these mistakes can not be exaggerated and and then to influence the accuracy of whole system.

Summary of the invention

Correspondingly; But the invention provides a kind of in the agricultural management system method when humidity value time spent adjustment and conversion sensor reading, said method comprises: from the step of sensor receiving sensor data, confirm sensor data packet whether comprise the step of humidity, from packet obtain moisture readings step, obtain based on the step of the independent constant of moisture readings and system database storage data and the step that in user interface, shows.

The present invention also provides a kind of also method of conversion sensor reading of in the agricultural management system, when humidity value is unavailable, adjusting, and said method comprising the steps of: from sensor receiving sensor data; Confirm whether sensor data packet comprises humidity; For each sensor calculates drift value, wherein said drift value is used to calculate the real sensor data; And in system database storage data and in user interface, showing.

The present invention also provides a kind of sensor characteristics curve adjusting module; Wherein module is the part in the agricultural management system; It allows adjustment and conversion to be stored in the sensor reading in the database, and wherein said module comprises that a kind of humidity compensate calculates and drift value compensation Calculation Method.

The present invention includes a plurality of novel characteristics and described in following specification and the accompanying drawing and shown in the part combination; Be appreciated that; Not deviating from scope of the present invention or not sacrificing on the basis of any advantage of the present invention, can make the change on the multiple details to the present invention.

Description of drawings

In conjunction with the following accompanying drawing that specifies and only provide but not limit the invention with by way of example, can make much of the present invention, wherein:

Fig. 1 illustrates the structure chart of the agricultural management system among the present invention.

Fig. 2 illustrates the input handling process in the sensor characteristics curve adjusting module among the present invention.

Embodiment

The present invention relates to the method for a kind of sensor characteristics curve adjusting module and adjustment and conversion sensor data.To in specification, the present invention be described preferred embodiment according to the present invention below.But, be appreciated that only describing preferred embodiment of the present invention here is in order to help to understand the present invention, can to imagine, on the basis of the scope that does not deviate from accompanying claims, those skilled in the art can make multiple adjustment and equivalence replacement.

To combine accompanying drawing with alone or in combination mode below, describe preferred embodiment in detail.

The invention provides a kind of sensor characteristics curve adjusting module 10, the value that it utilizes the formula adjustment and changes the reading that is sent by the sensor in the system.Said formula directly applies to all sensing datas from the input of sensor output.If receive with other unit from the data of sensor, millivolt for example, the sensing data of then proofreading and correct will be converted into the unit of more user friendlyization subsequently, PPM (ppm) for example, and be stored in the system database.Sensor characteristics curve adjusting module 10 is parts of bigger agricultural management system 20 shown in Figure 1.

Specify a particular constant for each sensor, this constant is based on sensor type and induction element.Therefore, each sensor loads different constant values, and each sensor is with designated one particular constant based on its type, to be different from other sensor.

The user interface connected system 20 and the sensor of this system 20 utilize asynchronous JavaScript and XML (AJAX) technology, adjust said constant or variable on the table that the user can be listed in database.In case sensing data is sent to system 20, the table after this change will come into force and will be embodied on the data that are stored in the database.

Adjustment and the method for conversion sensor data comprise the drift value of the humidity that compensates the soil that is placed with sensor, compensation sensor data and from the conversion of millivolt to PPM (ppm).

Shown in the embodiments of the invention among Fig. 2, agricultural management system 20 is from sensor receiving sensor data.This system confirms whether sensor data packet comprises any humidity value.When comprising humidity value in its specified data bag, system 20 uses this humidity value to obtain specific constant value, for example is used for m, c and the f of distinguishing sensor.Module 10 uses these constants to calculate the ppm value that is used for packet subsequently.Said data are stored in system's 20 databases now and are presented in the user interface of system 20.The constant value of the taking from moisture readings following formula that is used to derive:

Y＝[mX+c]×f

Wherein, Y is the real sensor data, and X serve as reasons this updating formula push away final sensing data.Be moisture readings in this example.This value will be presented on the PAMS user interface.

Otherwise if system does not indicate humidity value from the data that sensor receives, sensor characteristics curve adjusting module 10 will and then calculate the drift value that begins from sensor deployment time so.Therefore, need know the precise time of disposing sensor.Utilize this information, can calculate drift value.For example, sensor is in 10 deployment in the morning, and the current time is 2 pm.The drift value value of being appointed as x.By system 20 in the afternoon the sensor reading of 2 receptions be y.

Therefore,

Real sensor data=[total hourage * drift value]+sensor reading

=[(4 hours) * (x)]+y

＝4x+y

Subsequently, system 20 is the applied transformation formula in module 10, converting the real sensor data into PPM from millivolt, and it is presented on the user interface of system 20.The constant value of the taking from moisture readings following formula that is used to derive:

Y＝[mX+c]×f

Wherein m, c and f are the constant values of taking from moisture readings, and Y is the real sensor data.

The value of these corrections is stored in system's 20 databases and is presented on the user interface.

If the user is any drift value of configuration or humidity value in system 20 not, so module 10 will be in database in the corresponding position storing value " 0 " with expression sensor reading null value.

Said invention can be used in any sensor system that need adjust sensor reading, and said sensor reading needs offset drift value and humidity value.

Claims

One kind in agricultural management system (20) but in when the method for humidity value time spent adjustment and conversion sensor reading, said method comprising the steps of:

I. from sensor receiving sensor data;

Ii. confirm whether sensor data packet comprises humidity;

Iii. obtain moisture readings from packet;

Iv. obtain independent constant based on moisture readings; And

V. storage data and in user interface, showing in system (20) database.
2. method according to claim 1 is characterized in that, in sensor characteristics curve adjusting module (10), utilizes the independent constant that obtains will convert PPM (ppm) with the said sensing data that millivolt receives into.
3. method according to claim 2 is characterized in that the sensing data of being changed is presented in the user interface of said agricultural management system (20).
4. method according to claim 1 is characterized in that, the not configuration in said system (20) of said humidity value will be worth " 0 " and be stored in the said database.
5. in agricultural management system (20), when humidity value is unavailable, adjust the also method of conversion sensor reading for one kind, said method comprising the steps of:

I. from sensor receiving sensor data;

Ii. confirm whether sensor data packet comprises humidity;

Iii. each sensor is calculated the drift value based on laboratory research; Wherein said drift value is used to calculate the real sensor data; And

Iv. storage data and in user interface, showing in system (20) database.
6. method according to claim 5 is characterized in that, is utilized in the drift value that calculates in the sensor characteristics curve adjusting module (10), will convert PPM (ppm) with the said sensing data that millivolt receives into.
7. method according to claim 6 is characterized in that the sensing data of being changed is presented in the user interface of said agricultural management system (20).
8. method according to claim 5 is characterized in that, the not configuration in said system (20) of said drift value will be worth " 0 " and be stored in the said database.
9. according to claim 1 and 5 described methods, it is characterized in that the said data that are stored in the database utilize asynchronous JavaScript and XML (AJAX) technology to adjust.
10. a sensor characteristics curve adjusting module (10); Wherein said module (10) is the part in the agricultural management system (20); It allows adjustment and conversion to be stored in the sensor reading in the database, and wherein said module (10) comprises that a kind of humidity compensate calculates and drift value compensation Calculation Method.