KR101722465B1 - Removal sensor module of output sensor identification using one pin, apparatus and method of recognizing sensor of the removal sensor module using one pin - Google Patents

Abstract

The present invention relates to a detachable sensor module for outputting an identification value of a sensor with one pin, a sensor identification device for identifying the sensor of the detachable sensor module with one pin, and a sensor identification method, And an identification value output circuit for outputting the sensor identification value corresponding to the sensor through a single channel with an analog voltage.

Description

TECHNICAL FIELD [0001] The present invention relates to a detachable sensor module for outputting an identification value of a sensor with one pin, a sensor identification device for identifying the sensor of the detachable sensor module with one pin, and a sensor identification method. RECOGNIZING SENSOR OF REMOVAL SENSOR MODULE USING ONE PIN}

The present invention relates to a detachable sensor module that outputs an identification value of a sensor by outputting an analog voltage generated in a voltage applying circuit to a single pin, The present invention relates to a sensor identification device and a sensor identification method that uniquely identify a sensor of a detachable sensor module by using an analog / digital converter (ADC) value.

Internet of Things (IoT) is a technology that enables information to be shared by connecting objects in various fields such as home appliances and electronic devices as well as health care, remote meter reading, smart home, and smart car. The Internet of Things (IoT) can also be seen as an evolution from existing USN (Ubiquitous Sensor Network) or M2M (Machine to Machine).

In order to implement the Internet, sensor devices must collect data using at least one sensor.

Generally, in case of the sensor module required to implement the Internet, one communication module is connected to one sensor, and when several sensors are attached, only the circuit fixed to the fixed position can be designed.

2. Description of the Related Art In recent years, a sensor module that can be detached from a sensor device has been developed, and techniques for operating the sensor module regardless of the slot of the sensor device have appeared.

However, when two or more sensor modules are connected to one microcontroller unit (MCU), identification values must be assigned to different sensor modules in order to recognize the types of sensors included in the sensor module.

For sensor-based communication, it is necessary to use a universal serial bus (USB), a CAN (Controller Area Network), a 1-Wire, and an I2C to support buses or one-to-many communication. Each must be equipped with a separate microcontroller unit.

Korean Laid-Open Publication No. 2013-0056733

The present invention aims to uniquely identify a plurality of detachable sensor modules by utilizing an analog / digital converter (ADC) channel of a microcontroller unit.

The present invention aims at uniquely identifying a plurality of sensor modules using one pin.

The present invention aims to identify a plurality of sensor modules within an allowable error with low power.

The sensor module according to an embodiment includes a sensor outputting at least one sensor measurement value and an identification value output circuit unit outputting a sensor identification value corresponding to the sensor through a single channel with an analog voltage, The sensor identification value is input to an input terminal of an analog / digital converter (ADC) of a microcontroller and converted into an analog / digital converter (ADC) value according to the resolution of the microcontroller, The microcontroller identifies the sensor with a sensor identification value converted into the analog / digital converter (ADC) value.

The identification value output circuit unit outputs a voltage of an analog type corresponding to the sensor through a combination of at least one resistance value to a power input voltage Vcc of a predetermined size.

The value of the analog / digital converter (ADC) according to an exemplary embodiment includes a measurement value within an error range in which the resolution of the microcontroller is reflected.

The sensor may include an analog sensor outputting the sensor measurement value in an analog form, an analog composite sensor outputting at least two sensor measurement values in an analog form, a digital sensor outputting the sensor measurement value in a digital form, And a sensor.

The microcontroller according to an exemplary embodiment of the present invention refers to a table in which values of analog / digital converters (ADC) for each kind of sensor are recorded, and calculates the value of the converted analog / digital converter (ADC) Lt; RTI ID = 0.0 > a < / RTI >

A sensor identification apparatus according to an embodiment includes a collector for collecting a sensor identification value in the form of an analog voltage through a single channel corresponding to the sensor measurement value and the sensor measurement value, And an identification unit for identifying a sensor that senses the sensor measurement value from the converted analog / digital converter (ADC) value, .

The identification unit may refer to a table in which values of analog-to-digital (A / D) converters according to types of sensors are recorded, and calculate a value of the converted analog / digital converter And identifies the corresponding sensor.

The sensor identification apparatus according to an exemplary embodiment of the present invention may further include a storage unit for storing the table in which the value of the analog / digital converter (ADC) of the sensor is recorded.

A sensor identification method according to an embodiment includes the steps of collecting, at a collection section, a sensor identification value in the form of analog voltage through a single channel corresponding to a sensor measurement value; Converting an analog signal to an analog / digital converter (ADC) value, and identifying the sensor which senses the sensor measurement value from the converted analog / digital converter (ADC) Wherein the sensor identification value is output from a single pin among the pins of the sensor module that are detachably attached to the sensor device.

The step of identifying the sensor according to an exemplary embodiment of the present invention may be performed by referring to a table in which values of analog / digital converters (ADC) Converter) value of the sensor.

The method of identifying a sensor according to an exemplary embodiment of the present invention further includes storing the table in which the value of each type of the analog / digital converter (ADC) of the sensor is recorded.

The sensor identification program according to one embodiment includes a set of instructions for collecting sensor identification values in the form of analog voltages over a single channel corresponding to the sensor measurements, the sensor identification values of the collected analog voltage types in analog / digital converters (ADCs) And a command set that identifies a sensor that senses the sensor measurement value from the converted analog / digital converter (ADC) value.

According to embodiments, a plurality of detachable sensor modules can be uniquely identified using an analog-to-digital converter (ADC) channel of a microcontroller unit.

According to one embodiment, a single pin can be used to uniquely identify a plurality of sensor modules.

According to one embodiment, a plurality of sensor modules can be identified within an allowed error with low power.

1 is a view showing a sensor module according to an embodiment of the present invention and a sensor-based sensor device including a sensor identification device.
2A is a view for explaining a sensor module according to an embodiment of the present invention in more detail.
FIG. 2B is a view for explaining embodiments of the sensor unit included in the sensor module of FIG. 2A.
FIG. 2C is a view for explaining an embodiment of an identification value output circuit included in the sensor module of FIG. 2A. FIG.
3 is a view for explaining the sensor device according to an embodiment of the present invention in more detail.
4 is a view for explaining the sensor device according to another embodiment of the present invention in more detail.
5 is a view for explaining a table in which the sensor identification value and the type of sensor according to the value of an analog / digital converter (ADC) are recorded.
6A and 6B are diagrams illustrating values of an analog-to-digital converter (ADC) according to an input voltage.
7 is a view for explaining a sensor identification method according to an embodiment of the present invention.
FIG. 8 is a view for explaining a specific method of collecting sensor identification values among sensor identification methods according to an embodiment of the present invention.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. However, the scope of the rights is not limited or limited by these embodiments. Like reference symbols in the drawings denote like elements.

The terms used in the following description are chosen to be generic and universal in the art to which they are related, but other terms may exist depending on the development and / or change in technology, customs, preferences of the technician, and the like. Accordingly, the terminology used in the following description should not be construed as limiting the technical thought, but should be understood in the exemplary language used to describe the embodiments.

Also, in certain cases, there may be a term chosen arbitrarily by the applicant, in which case the meaning of the detailed description in the corresponding description section. Therefore, the term used in the following description should be understood based on the meaning of the term, not the name of a simple term, and the contents throughout the specification.

FIG. 1 is a diagram illustrating a sensor-based sensor device 100 including a sensor module 110 and a sensor identification device 120 according to an embodiment of the present invention.

The object-based sensor device 100 can detachably connect or disconnect the sensor module 110 to / from the sensor identification device 120.

The sensor module 110 according to an exemplary embodiment may include various sensors necessary to implement the object Internet service, such as a temperature sensor, a humidity sensor, a gas sensor, a distance sensor, and the like. In addition, a sensor identification value capable of uniquely identifying each sensor may be assigned to each sensor. The sensor identification device 120 identifies the kind of the sensor module 110 installed in the slot, It is possible.

To this end, the sensor module 110 outputs an analog voltage value using one pin, and the sensor identification device 120 receives the analog voltage value transmitted from the sensor module 110, 110 can be uniquely identified.

At this time, the voltage value outputted in the analog form corresponds to the sensor identification value as the voltage output according to the circuit configuration of the sensor module 110. [ The sensor identification value may be assigned to each sensor by a gap of more than the allowable value. For example, the sensor identification value may be given to the sensors at a voltage value of up to 5V at an interval of 0.2V starting from 0.2V.

For example, the sensor identification device 120 may be interpreted as a microcontroller unit. That is, in the microcontroller unit, a table indicating the sensor type by sensor identification value is recorded, and a command set or address information accessible to the table can be recorded.

To this end, the sensor identification device 120 must convert the sensor identification value transmitted from the first pin of the sensor module 110 into an analog / digital converter (ADC) value. A sensor identification device 120 such as a microcontroller unit includes an analog / digital channel, and sensor identification values transmitted from pin 1 of the sensor module 110 are analog / digital channels ). The sensor identification value input to the sensor identification device 120 through the analog / digital channel can be converted into an analog / digital converter (ADC) value.

At least one value among a sensor identification value and an analog / digital converter (ADC) value is recorded in the table, and the type of sensor corresponding thereto is also recorded.

The sensor identification device 120 can identify the type of the sensor corresponding to the sensor identification value or the analog / digital converter (ADC) value with reference to this table.

Since the sensor identification value is outputted through one pin of the sensor module 110, the circuit design is simple and low power consumption is required, so that price competitiveness can be ensured.

In addition, since a plurality of sensor modules can be connected to a limited analog / digital channel using a multiplexer or the like, compatibility can be improved at low cost.

In addition, since the sensor device according to the present invention does not require any additional hardware to identify the sensor modules, the sensor device can be driven with low power while maintaining the existing size.

2A is a view for explaining the sensor module 200 according to an embodiment of the present invention in more detail.

The sensor module 200 according to an exemplary embodiment may include a sensor unit 210 and an identification value output circuit unit 220.

The sensor unit 210 according to one embodiment includes a sensor that outputs at least one sensor measurement value. The sensors included in the sensor unit 210 can be interpreted as various devices capable of collecting various values and outputting sensor measurement values in the object Internet environment.

FIG. 2B is a view for explaining embodiments of the sensor unit included in the sensor module of FIG. 2A.

For example, the sensor units 211, 212, and 213 may include a sensor unit 211 including a single sensor outputting one sensor measurement value in the form of an analog voltage, a complex sensor outputting a plurality of sensor measurement values in the form of an analog voltage And a sensor unit 212 including a sensor. It may also be interpreted as a sensor unit 213 including a single sensor outputting one sensor measurement value in the form of a digital voltage through an SCL (Serial CLock) and an SDA (Serial DAta).

The identification value output circuit 220 according to an exemplary embodiment may output the sensor identification value corresponding to the sensor as an analog voltage.

FIG. 2C is a view for explaining an embodiment of the identification value output circuit portion 221 included in the sensor module of FIG. 2A.

The identification value output circuit unit 221 according to an embodiment can change and output a voltage of an analog form corresponding to the sensor through a combination of at least one resistance value to a power input voltage Vcc of a predetermined size have.

Specifically, the identification value output circuit portion 221 according to an embodiment includes the identification value output circuit 222, and the identification value output circuit 222 outputs the power Vcc to the sensor identification value through two different resistors So that no separate microcontroller is needed.

Below it can be in consideration of the power supply Vcc and the sensor identification _(ID V) by Equation 1 to calculate the resistance value (R1, R2).

[Equation 1]

For example, in order to output a sensor identification value of 0.2 V when the power supply Vcc is 5 V in the identification value output circuit 222, R1 = 100 ohms and R2 = 2.4 K ohms can be calculated by Equation (1) have.

That is, when two resistances of R1 = 100 ohms and R2 = 2.4K ohms are connected in series to the identification value output circuit 222 and 5V power is applied, the sensor identification value of the voltage of 0.2V can be outputted.

On the other hand, the sensor identification device capable of identifying the sensor of the sensor module can be interpreted as a microcontroller. The microcontroller also includes a collector for collecting sensor identification values in the form of analog voltages through a single channel corresponding to the sensor measurements and the sensor measurements, And an identification unit for identifying a sensor that senses the sensor measurement value from the converted analog / digital converter (ADC) value.

The collection unit, the conversion unit, and the identification unit may be implemented at least temporarily by at least one processor.

For example, the identification unit identifies a sensor corresponding to a converted analog-to-digital converter (ADC) value by referring to a table in which values of analog-to-digital converters (ADC) can do.

For example, the sensor identification device may further include a storage unit for storing a table in which values of analog-to-digital converters (ADC) of the sensor type are recorded.

The microcontroller can collect the sensor identification values output from the sensor, as well as the analog-type sensor output from the single channel.

Specifically, the sensor identification value of the analog type is input to an input terminal of an analog / digital converter (ADC) of a microcontroller through an analog / digital channel (analog / digital channel) To-digital converter (ADC) values. In addition, the microcontroller can identify the sensor with the sensor identification value converted into an analog / digital converter (ADC) value.

For example, an analog-to-digital converter (ADC) value includes a measurement value within an error range that reflects the resolution of the microcontroller.

For example, the microcontroller refers to a table in which values of analog / digital converters (ADC) of each kind of sensor are recorded, and calculates a sensor corresponding to the converted analog / digital converter (ADC) Can be identified.

Although FIG. 2 illustrates the present invention using a 4-pin sensor module, an 8-pin sensor module may be used.

The 4-pin sensor module can be applied to a single sensor, and the 8-pin sensor can be applied to a complex sensor that can use multiple sensor output values.

3 is a view for explaining the sensor device 300 according to an embodiment of the present invention in more detail.

The sensor device 300 according to an exemplary embodiment includes a sensor module 310 including a sensor and an identification value output circuit, a sensor measurement value output from the sensor module, and a sensor identification value to identify the sensor, And a sensor identification device 320 for providing the measurement value of the object Internet service to the platform of the object Internet service.

Among the sensor identification devices 320, a micro controller unit (MCU) collects sensor identification values to identify the sensors, and the sensor module interface unit has a function of interfacing the sensor module 310 and the sensor identification unit 320 Can be performed.

The power supply unit can supply driving power so that a microcontroller unit (MCU), a sensor module interface unit, a sensor module 310, and the like can be driven.

4 is a view for explaining the sensor device 400 according to another embodiment of the present invention in more detail.

The sensor device 400 according to an embodiment of the present invention has a structure in which a plurality of sensor modules 410 are connected to a sensor identification device 420 and is input to an analog channel of a microcontroller unit (MCU) .

The sensor device 400 may be supplied with driving power through a power control unit and a battery power source.

5 is a view for explaining a table 500 in which the sensor identification value and the type of sensor according to the value of an analog / digital converter (ADC) are recorded.

The table 500 includes a sensor identification value (VID) according to the sensor type and a field indicating an ADC value corresponding to the sensor identification value.

For example, the temperature sensor corresponds to a sensor identification value (VID) of 0.2 V and an analog-to-digital converter value (ADC value) of 39 to 41.

Specifically, if the identification value output circuit of the sensor module outputs an analog voltage of 0.2 V, it can be identified based on the table 500 that the corresponding sensor module is a module including a temperature sensor. However, this determination can be made by a sensor identification device including a microcontroller. When the analog voltage of 0.2 V is inputted, the microcontroller converts the analog value to an ADC value of 39 to 41. In other words, when the sensor identification value transmitted to the microcontroller is converted into the ADC value of 39 to 41, the microcontroller includes the temperature sensor which outputs the sensor identification value of 0.2 V Can be identified.

Likewise, the sensor module may include a composite sensor capable of outputting a plurality of sensor measurements.

For example, when a sensor module mounted on a sensor device outputs a sensor identification value of 0.8 V, the sensor identification device collects a sensor identification value of 0.8 V and outputs an ADC value corresponding to 161-164 ) Can be identified. Also, the sensor identification device can confirm that the identified ADC value by referring to the table 500 is a complex sensor capable of measuring both temperature and humidity.

6A and 6B are diagrams illustrating values of an analog-to-digital converter (ADC) according to an input voltage.

Reference numeral 610 in FIG. 6A denotes an analog-to-digital converter (ADC) value according to an input voltage.

For example, when an input voltage of 0.1 V occurs, the value of the corresponding analog / digital converter (ADC) is measured in a range of 17 to 18. When an input voltage of 0.2 V is generated, The corresponding analog-to-digital converter (ADC) value is measured in the range of 39 to 41. Also, when an input voltage of 0.3 V is generated, the corresponding analog-to-digital converter (ADC) value is measured in the range of 59 to 60.

That is, the value of the analog / digital converter (ADC) due to the voltage difference of 0.1 V can be uniquely identified according to the resolution of the microcontroller unit.

Reference numeral 620 in FIG. 6B is a graph showing an input voltage in FIG. 6A and an average (ADC avg) of an analog-to-digital converter (ADC) value with respect to the input voltage.

As can be seen at reference numeral 620, it can be seen that each analog-to-digital converter (ADC) value is clearly uniquely identified even in the case of an input voltage having a gap of 0.1V.

As a result, even if the sensor module according to an embodiment of the present invention outputs a sensor identification value having a gap of 0.1 V through one pin, the sensor identification device can refer to the table to uniquely identify the sensor included in the sensor module .

7 is a view for explaining a sensor identification method according to an embodiment of the present invention.

A sensor identification method according to an embodiment of the present invention collects sensor identification values in the form of an analog voltage (step 701).

In particular, the sensor identification method according to one embodiment may collect sensor identification values in the form of analog voltage through a single channel corresponding to the sensor measurements. For example, the sensor identification value may be output from one of the pins of the sensor module, which is detachably attached to the sensor device.

Next, the sensor identification method according to an embodiment of the present invention converts the sensor identification value into an analog / digital converter (ADC) value (step 702). A sensor identification method according to an exemplary embodiment converts a sensor identification value of the collected analog voltage type into an analog / digital converter (ADC) value.

Next, the sensor identification method according to an exemplary embodiment identifies the sensor from the converted analog-to-digital converter (ADC) value (step 703). Specifically, a sensor that senses the sensor measurement value is identified from a converted analog / digital converter (ADC) value.

A sensor identification method according to an exemplary embodiment of the present invention refers to a table in which values of analog / digital converters (ADCs) of respective types of sensors are recorded in order to identify a sensor, and a converted analog / Converter) value.

FIG. 8 is a view for explaining a specific method of collecting sensor identification values among sensor identification methods according to an embodiment of the present invention.

A sensor identification method according to one embodiment scans an analog input pin for a sensor module (step 801). That is, the microcontroller includes pins capable of collecting a plurality of analog input values. According to an embodiment of the present invention, a sensor identification method can perform scanning to find pins to which an analog voltage is applied to the pins.

In addition, the sensor identification method according to an exemplary embodiment may determine whether a pin in which an analog input value is generated exists (step 802).

If there is a pin in which an analog input value is generated, the pin information having the analog input value is stored (step 803), and it can be determined whether to complete the scan of the analog input pin for the sensor module (step 804).

If the pin where the analog input value is generated does not exist, the sensor identification method according to one embodiment may branch to step 804 and determine whether to complete the scan of the analog input pin for the sensor module.

Next, the sensor identification method according to an exemplary embodiment stores the number of scan-completed analog input pins (step 805). The sensor module outputs one sensor identification value through one pin, but a plurality of sensor modules may be mounted on the sensor device. That is, the sensor identification method according to one embodiment can record the number of the mounted sensor modules by storing the number of analog input pins through step 805. [

A sensor identification method according to one embodiment reads data of a sensor module connected to an analog pin (step 806). That is, the sensor identification method according to one embodiment can read the sensor measurement values collected from the mounted sensor module.

In addition, the sensor identification method reads and stores the sensor measurement value together with the sensor identification value of the sensor module through step 807. At this time, the sensor identification value and the sensor measurement value can be recorded in association with each other, thereby confirming which sensor has collected the sensing value.

The sensor identification method according to an embodiment may determine whether all the data (sensor measurement value and sensor identification value) of the mounted sensor module have been read (step 808).

If all of the sensor module data (sensor measurement value and sensor identification value) has been read as a result of the determination in step 808, the data (sensor measurement value and sensor identification value) of the sensor module collected for data processing can be transmitted to the processing unit (Step 809).

Thereafter, the sensor identification method according to an exemplary embodiment may determine whether it is a period for analog pin scanning (step 810). If the corresponding period has not elapsed, the sensor identification method according to an exemplary embodiment may be repeatedly performed from the process of reading data of the sensor module connected to the analog input pin by branching to step 806. If the period has elapsed, the process may again branch to step 801 and repeat the process from the analog input pin scanning process for the sensor module.

As a result, according to the present invention, it is possible to uniquely identify a plurality of detachable sensor modules by utilizing an analog / digital converter (ADC) channel of a microcontroller unit. In addition, one pin can be used to uniquely identify a plurality of sensor modules, and various sensor modules can be identified with low power within an allowable error.

The method according to an embodiment of the present invention can be implemented in the form of a program command which can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions recorded on the medium may be those specially designed and configured for the present invention or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. This is possible.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the equivalents of the claims, as well as the claims.

Claims (12)

A sensor outputting a sensor measurement value; And
And an identification value output circuit for outputting a sensor identification value in the form of an analog voltage through a single channel corresponding to the sensor measurement value,
The sensor identification value of the analog voltage type is inputted to one of the input terminals of an analog / digital converter (ADC) of the microcontroller and converted into an analog / digital converter value according to the resolution of the microcontroller,
Wherein the microcontroller is configured to scan analogue to digital converter input terminals including any one of the analogue to digital converter (ADC) input terminals and to convert the analogue voltage of the scanned analogue / A sensor input module for inputting an analog input value including a sensor identification value of the sensor identification value of the sensor input module and the number of the input terminals to determine the number of connected sensor modules, Receiving data including the sensor identification value of the analog voltage type, storing the sensor measurement value and the sensor identification value of the analog voltage type in association with each other, and storing the sensor identification value in the form of the analog voltage included in the received data From the analog-to-digital converter value Sensor A sensor module that identifies the sensor that issued the measurement.
The method according to claim 1,
Wherein the identification value output circuit section
And changes the voltage to an analog voltage corresponding to the sensor through a combination of at least one resistance value with respect to a power input voltage (Vcc) of a predetermined size.
The method according to claim 1,
Wherein the value of the analog-to-digital converter (ADC) is a measurement value within an error range in which the resolution of the microcontroller is reflected.
The method according to claim 1,
The sensor may include at least one of an analog sensor outputting the sensor measurement value in analog form, an analog composite sensor outputting at least two sensor measurement values in analog form, and a digital sensor outputting the sensor measurement value in digital form Included sensor module.
The method according to claim 1,
The microcontroller includes:
A sensor module that identifies the sensor corresponding to the converted analog-to-digital converter (ADC) value with reference to a table in which values of analog / digital converters (ADC) .
A collector for collecting sensor identification values in the form of analog voltages through a single channel corresponding to the sensor measurements and the sensor measurements;
A converter for converting the collected sensor identification value of the analog voltage type into an analog / digital converter (ADC) value; And
And an identification unit for identifying a sensor that senses the sensor measurement value from the converted analog / digital converter value,
Wherein the collecting unit stores the sensor measurement value and the sensor identification value of the analog voltage type in association with each other,
Scanning the input terminals of the analog-to-digital converter (ADC) inputs before collecting the sensor identification value and outputting an analog signal having the sensor identification value of the analog voltage type among the scanned analog- Wherein the sensor identification unit identifies an input terminal where an input value has occurred and determines the number of connected sensor modules by storing the number of the identified input terminals.
The method according to claim 6,
Wherein,
A sensor identification (ID) identifying the sensor corresponding to the converted analog / digital converter (ADC) value by referring to a table in which values of analog / digital converters (ADC) Device.
8. The method of claim 7,
A storage unit for storing the table in which the value of the analog / digital converter (ADC)
The sensor identification device further comprising:
Scanning analog-to-digital converter (ADC) input terminals;
Identifying an input terminal from which the analog input value of the scanned analog-to-digital converter input terminals occurred;
Storing the number of the identified input terminals to determine the number of connected sensor modules;
Collecting sensor identification values in the form of analog voltages through a single channel corresponding to the sensor measurements;
Converting the collected sensor identification value of the analog voltage type into an analog / digital converter (ADC) value; And
Identifying in the identification section a sensor that senses the sensor measurement value from the converted analog / digital converter value,
The step of collecting the sensor identification value comprises:
And associating and storing the sensor measurement value and the sensor identification value in the form of the analog voltage.
10. The method of claim 9,
Wherein identifying the sensor comprises:
Identifying the sensor corresponding to the converted analog-to-digital converter (ADC) value by referring to a table in which values of analog-to-digital (ADC)
/ RTI >
11. The method of claim 10,
Storing the table in which a value of an analog / digital converter (ADC) for each type of sensor is recorded in a storage unit
Further comprising the steps of:
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