JP2019092112A - Calibration apparatus, calibration method, and manufacturing method of sensor apparatus - Google Patents

Abstract

To provide a calibration apparatus, a calibration method, and a manufacturing method of a sensor apparatus capable of performing calibration on a plurality of objects with respect to the arrangement state of the plurality of objects in a communication line without considering the distance from a calibration device.SOLUTION: A calibration device connected with a plurality of objects to perform calibration of the plurality of objects, includes a voltage supply unit and a calibration control unit. The calibration device can set a different unique address for each of the plurality of objects by supplying a supply voltage of a different voltage value to the object when the plurality of objects are connected to the calibration device. As a result, when the calibration device transmits and receives various information to and from the plurality of objects, the calibration device can distinguish the objects on the basis of the unique address without considering the distance from the calibration device.SELECTED DRAWING: Figure 3

Description

  The present disclosure relates to a calibration device, a calibration method, and a method of manufacturing a sensor device in which a plurality of objects are connected to perform calibration of the plurality of objects.

  As a calibration device that performs calibration simultaneously on a plurality of objects requiring calibration, for example, unique addresses are set for each of the plurality of objects, and information is transmitted and received individually to the plurality of objects based on the unique addresses. Calibration devices have been proposed.

  That is, by setting unique addresses to a plurality of objects in advance and connecting the plurality of objects to the calibration apparatus, it becomes possible to perform calibration on a plurality of objects simultaneously.

  Alternatively, after connecting a plurality of objects to the calibration device, it is also possible to set unique addresses for the plurality of objects. For example, a configuration in which a calibration device (management device) outputs DC voltage to a plurality of objects (terminal devices) via a communication line, and each of the plurality of objects measures its voltage value and sets its own unique address. Has been proposed (Patent Document 1). At this time, since the measured voltage values become different values due to the difference in distance from the calibration apparatus, the plurality of objects can be set with different unique addresses.

  The calibration apparatus having such a configuration can transmit and receive various information with each of the plurality of objects using the unique address set after connection of the plurality of objects, so calibration can be performed simultaneously for the plurality of objects. Can run the

JP 2005-051507 A

  However, since the above-mentioned conventional calibration device is configured to output a DC voltage to each of a plurality of objects via the communication line, depending on the arrangement state (connection state) of the plurality of objects on the communication line Since the distances to the calibration device may be the same and the measured voltage values may be the same, there is a possibility that the unique address can not be set appropriately.

  That is, with regard to the arrangement state of the plurality of objects in the communication line, the plurality of objects are arranged such that the distances to the calibration device are not the same (in other words, the measured voltage values are not the same) There is a restriction that you need to

  Therefore, with regard to the arrangement state of a plurality of objects in a communication line, a calibration device capable of executing calibration on a plurality of objects without considering the distance from the calibration device, a calibration method, and a method of manufacturing a sensor device Intended to provide.

  One aspect of the present disclosure is a calibration device that is connected to a plurality of objects and performs calibration of the plurality of objects, and includes a voltage supply unit and a calibration control unit.

Each of the plurality of objects sets a unique address based on a communication unit that communicates using a unique address, a voltage determination unit that determines the voltage value of the supply voltage supplied from the outside, and the voltage value of the supply voltage And an address setting unit.
The voltage supply unit is configured to set a unique address by supplying supply voltages of different voltage values to each of the plurality of objects. The calibration control unit acquires the characteristic information corresponding to the unique address from each of the plurality of objects via the communication unit, and the unique address corresponding to the characteristic information is set with the parameter value calculated for each characteristic information. It is configured to transmit to an object.

  Such a calibration apparatus sets different unique addresses for each of a plurality of objects by supplying supply voltages of different voltage values to the plurality of objects when a plurality of objects are connected. it can.

  Thereby, the calibration device can distinguish the objects based on the unique address without considering the distance from the calibration device when transmitting and receiving various information to and from the plurality of objects. The calibration process can be appropriately performed and the parameter value can be set for each item.

  Another aspect of the present disclosure is a calibration method in which a plurality of objects are connected to perform calibration of the plurality of objects, and the method includes a voltage supply step and a calibration control step.

Each of the plurality of objects sets a unique address based on a communication unit that communicates using a unique address, a voltage determination unit that determines the voltage value of the supply voltage supplied from the outside, and the voltage value of the supply voltage And an address setting unit.
The voltage supply step is a step in which a unique address is set by supplying supply voltages of different voltage values to each of a plurality of objects. The calibration control step acquires characteristic information corresponding to the unique address from each of the plurality of objects via the communication unit, and the unique address corresponding to the characteristic information is set with the parameter value calculated for each of the characteristic information. It is a step of transmitting to an object.

  In such a calibration method, when a plurality of objects are connected, different unique addresses are set for the plurality of objects by supplying supply voltages of different voltage values to the plurality of objects. Can.

Thereby, the calibration method can distinguish the objects based on the unique address without taking into consideration the distance from the calibration device when transmitting and receiving various information to and from the plurality of objects. The calibration process can be appropriately performed and the parameter value can be set for each of the objects.
Another aspect of the present disclosure is a method of manufacturing a sensor device that detects a state of an environmental atmosphere, and a calibration step of performing calibration for adjusting individual differences in sensor output accuracy among a plurality of the sensor devices. In the calibration step, calibration is performed using the calibration method described above.
Each of the plurality of sensor devices sets a unique address based on a communication unit that communicates using a unique address, a voltage determination unit that determines a voltage value of a supply voltage supplied from the outside, and a voltage value of the supply voltage And an address setting unit.
According to this manufacturing method, when performing calibration in a plurality of sensor devices, supply voltages having different voltage values are supplied to the plurality of sensor devices when the plurality of sensor devices are connected. Different unique addresses can be set.
Thereby, the manufacturing method can distinguish the sensor device based on the unique address without considering the distance from the calibration device when transmitting and receiving various information to and from the plurality of sensor devices. It is possible to properly perform calibration processing and set parameter values for each device.

It is a figure showing composition of a calibration device. It is a figure which shows the structure of a sensor apparatus. It is a flowchart which shows the process sequence of a calibration process. While showing the voltage range of the after-conversion voltage Vdc which a voltage setting part can output, it is explanatory drawing showing the correspondence of each area | region of the non-use range at the time of detection, and the address n. It is the timing chart which represented typically the communication state of a control apparatus and a sensor apparatus at the time of execution of calibration processing.

Hereinafter, embodiments to which the present disclosure is applied will be described using the drawings.
The present disclosure is not limited to the following embodiments at all, and it goes without saying that various forms can be adopted within the technical scope of the present disclosure.

[1. First embodiment]
[1-1. overall structure]
The calibration apparatus 100 according to the first embodiment will be described with reference to the drawings. The calibration apparatus 100 is an apparatus to which a plurality (X) of sensor devices S1 to SX are connected to perform calibration of the sensor devices S1 to SX.
The calibration device 100 can be used, for example, in the calibration process included in the manufacturing process of the sensor devices S1 to SX. In the calibration process, calibration for adjusting individual differences in sensor output accuracy in the plurality of sensor devices S1 to SX is performed.

  As shown in FIG. 1, the calibration device 100 includes a control device 110, one communication line 150, X communication connectors CSA1 to CSAX, one voltage supply line 151, and X voltage setting units VS1. .About.VSX and X voltage connectors CVA1 to CVAX. X is an integer of 2 or more, and may be an integer of 5 or more.

The control device 110 includes a microcomputer having a CPU, a ROM, a RAM, an I / O, and the like. Communication line 150 and voltage supply line 151 are connected to control device 110.
The control device 110 communicates with the sensor devices S1 to SX via the communication line 150, and performs calibration of the sensor devices S1 to SX. In the present embodiment, the communication line 150 is a CAN communication bus used for communication in accordance with the CAN (registered trademark) protocol, and two data lines (a first data line 150a and a second data line 150b) through which communication data flow. See Figure 2).

  The communication connectors CSA1 to CSAX are respectively connected to connection points PS1 to PSX of the communication line 150. The communication connectors CSA1 to CSAX each include two first data terminals TSAa and TSAb (see FIG. 2) connected to two data lines.

  Control device 110 supplies drive voltage Vd to each of voltage setting units VS1 to VSX via voltage supply line 151. The voltage supply line 151 is a voltage supply line for supplying the drive voltage Vd output from the control device 110, and a power supply line 151a (see FIG. 2) connected to the positive electrode of the voltage output terminal of the control device 110 And a ground line 151b (see FIG. 2) connected to the negative electrode of the voltage output terminal of the device 110.

  The voltage setting units VS1 to VSX have their first ends respectively connected to the connection points PV1 to PVX of the voltage supply line 151 and their second ends connected to the voltage connectors CVA1 to CVAX, respectively, in parallel with each other. There is. The voltage setting units VS1 to VSX perform voltage conversion on the driving voltage Vd supplied from the control device 110, and output the converted voltage Vdc to the voltage connectors CVA1 to CVAX. The voltage setting units VS1 to VSX are configured such that the converted voltages Vdc have different voltage values.

  Voltage connectors CVA1 to CVAX are respectively connected to a first power supply terminal TVAa (see FIG. 2) connected to a positive electrode of voltage output terminals of voltage setting units VS1 to VSX, and connected to a negative electrode of voltage output terminals of voltage setting units VS1 to VSX. 1 ground terminal TVAb (see FIG. 2).

  In the present embodiment, calibration is processing for adjusting individual differences in sensor output accuracy in each of the sensor devices S1 to SX. Specifically, the calibration receives initial values from each of the sensor devices S1 to SX, and calculates correction parameters based on the difference between each initial value and the reference value. This is processing for transmitting correction parameters to each. The calibration of the sensor devices S1 to SX is performed, for example, before shipment of the sensor devices S1 to SX.

  Moreover, each initial value arrange | positions sensor apparatus S1-SX in the specific atmosphere to which the state quantity was set beforehand, and when state quantity is detected in each of sensor apparatus S1-SX, each of sensor apparatus S1-SX Output. Further, the reference value is a value corresponding to the outputs of the sensor devices S1 to SX at the time of detection of the above-described preset state quantity, and is stored in advance in a memory such as the ROM of the control device 110.

  The sensor devices S1 to SX are devices mounted on a vehicle to detect a state quantity, and for example, a hydrogen sensor device that detects a hydrogen concentration as a state quantity, an oxygen sensor device that detects an oxygen concentration as a state quantity, It is a temperature sensor device etc. which detect temperature as quantity. The sensor devices S1 to SX respectively include communication connectors CSB1 to CSBX and voltage connectors CVB1 to CVBX.

  The communication connectors CSB1 to CSBX respectively include two second data terminals TSBa and TSBb (see FIG. 2). The two second data terminals TSBa and TSBb are connected to the two first data terminals TSAa and TSAb in the communication connectors CSA1 to CSAX. The voltage connectors CVB1 to CVBX each include a second power supply terminal TVBa (see FIG. 2) and a second ground terminal TVBb (see FIG. 2). The second power supply terminal TVBa and the second ground terminal TVBb are connected to the first power supply terminal TVAa and the first ground terminal TVAb in the voltage connectors CVA1 to CVAX, respectively.

  Different addresses are set in the sensor devices S1 to SX based on the converted voltage Vdc from the calibration device 100. The address is a code for identifying the sensor devices S1 to SX in communication using the communication line 150.

[1-2. Sensor device]
Here, the configuration of the sensor device S1 will be described with reference to FIG. In addition to sensor apparatus S1, in FIG. 2, a part of calibration apparatus 100 is illustrated. The sensor devices S2 to SX1 have the same configuration as the sensor device S1.

The sensor device S1 includes a sensor control unit 121 (hereinafter also referred to as an MCU 121), a regulator 123, a detection unit 125, a voltage determination unit 127, and an internal communication line 129.
The sensor control unit 121 includes a microcomputer having a CPU, a ROM, a RAM, an I / O, and the like. The regulator 123 performs voltage conversion on the converted voltage Vdc supplied from the calibration device 100, and outputs the converted operating voltage Vrg to each part (such as the MCU 121) of the sensor device S1. Each part of sensor apparatus S1 is comprised so that it may operate | move by the electric power supply by the operating voltage Vrg.

  The detection unit 125 is configured to include a detection element for detecting the amount of state of the measurement target. Examples of the detection element include a gas detection element for detecting the gas concentration of a specific component (oxygen, hydrogen, NOx, etc.) contained in the measurement gas, and a temperature detection element for detecting the temperature of the measurement object.

  The voltage determination unit 127 includes two resistance elements (first resistance R1 and second resistance R2) connected in series. The voltage determination unit 127 divides the converted voltage Vdc output from the voltage setting unit VS1 using the first resistor R1 and the second resistor R2 and outputs a divided voltage Vj to the MCU 121.

  The MCU 121 determines the converted voltage Vdc based on the divided voltage Vj and each resistance value of the first resistor R1 and the second resistor R2. The MCU 121 sets an address based on the converted voltage Vdc.

  The MCU 121 and the voltage determination unit 127 have a function as a voltage determination unit that determines the voltage value of the converted voltage Vdc supplied from the calibration device 100. The MCU 121 has a function as an address setting unit that sets a unique address based on the voltage value of the converted voltage Vdc.

  The internal communication line 129 is a communication line connecting the MCU 121 and the communication connector CSB1, and includes two data lines (first internal data line 129a and second internal data line 129b) through which communication data flow.

  The MCU 121 communicates with the control device 110 via the internal communication line 129 and the communication connector CSB1. Specifically, the MCU 121 communicates with the control device 110 in accordance with the CAN protocol via the internal communication line 129, the communication connector CSB1, the communication connector CSA1, and the communication line 150, and performs communication with the control device 110. Send and receive various data. That is, the MCU 121 has a function as a communication unit that performs communication using a unique address.

[1-3. processing]
The processing procedure of the calibration process of the first embodiment will be described with reference to the flowchart of FIG. This calibration process is one of control processes executed by the control device 110.

  Control device 110 starts this calibration process in a state where communication connectors CSB1 to CSBX and voltage connectors CVB1 to CVBX of sensor devices S1 to SX are connected to communication connectors CSA1 to CSAX and voltage connectors CVA1 to CVAX. .

  First, at S110 (S represents a step), control device 110 starts output of drive voltage Vd to voltage setting units VS1 to VSX. Thus, the voltage setting units VS1 to VSX respectively convert the drive voltage Vd and output the converted voltage Vdc to the voltage connectors CVA1 to CVAX. That is, the voltage setting units VS1 to VSX respectively output the converted voltages Vdc of different voltage values to the sensor devices S1 to SX via the voltage connectors CVA1 to CVAX.

Here, the voltage range of the converted voltage Vdc that can be output by the voltage setting units VS1 to VSX will be described using FIG. 4.
The voltage setting units VS1 to VSX are configured to be able to output a voltage of at least 0 to 25 [V] as the post-conversion voltage Vdc. The sensor devices S1 to SX can perform normal operation (detection operation, calibration operation, etc.) when a voltage of 6 [V] or more is supplied.

  Therefore, sensor devices S1 to SX can not execute the normal operation of 0 to 6 [V] in the voltage range in which voltage setting units VS1 to VSX can output (in other words, the voltage range of converted voltage Vdc) The “inoperable range” is 6 to 25 [V] is the “operable range” in which the sensor devices S1 to SX can perform the normal operation.

  Further, 6 to 16 [V] in the “operable range” is a voltage range (hereinafter also referred to as “detection range used”) to be used at the detection operation of the sensor devices S1 to SX, and 16 to 25. [V] is a voltage range which is not used at the time of detection operation of the sensor devices S1 to SX (hereinafter, also referred to as “detection non-use range”). In the present embodiment, the “detection non-use range” is used as a voltage range used during the calibration operation of the sensor devices S1 to SX.

  In this embodiment, the “detection non-use range” is divided into a plurality of areas, and the correspondence between each area and the address n is set in advance. Each of the sensor devices S1 to SX determines which region the converted voltage Vdc supplied to itself corresponds to, and sets its own address n based on the above-described correspondence relationship. For example, when the correspondence between the area and the address n is set as shown in FIG. 4, if the converted voltage Vdc supplied to the sensor device S1 is 24 to 25 [V], the sensor device S1 sets an address 1 to itself and performs CAN communication.

Returning to FIG. 3, in the next S120, the control device 110 sets the counter variable n to “1” which is an initial value (n = 1).
At the next S130, the control device 110 outputs a command signal to the sensor device Sn at the address n. When receiving the command signal, the sensor device Sn sends an initial value back to the control device 110 based on the command signal. In addition, as described above, the sensor devices S1 to SX are disposed in a specific atmosphere in which the state amount is set in advance, and the sensor devices S1 to S1 are detected when the state amount is detected in each of the sensor devices S1 to SX. It is each output of SX.

  In the next S140, the control device 110 calculates a correction parameter based on the initial value received from the sensor device Sn. Specifically, the control device 110 calculates a correction parameter for correcting the output error of the sensor device Sn based on the difference between the received initial value and the reference value.

  At next S150, the control device 110 transmits the correction parameter to the sensor device Sn. The sensor device Sn stores the received correction parameter in a storage unit (such as a RAM). In addition, sensor apparatus Sn can suppress the fall of detection accuracy by reading the parameter for correction | amendment from a memory | storage part, and correcting an output difference | error at the time of the detection operation after shipment.

  At next S160, the control device 110 determines whether or not calculation of correction parameters has been performed for all the sensor devices S1 to SX. If a positive determination is made, the process proceeds to S180, and if a negative determination is made, the process proceeds to S170. Specifically, control device 110 determines whether or not counter variable n is a total number X or more (n ≧ X?).

When a negative determination is made in S160 and the process proceeds to S170, the control device 110 adds 1 to the counter variable n (n = n + 1). Thereafter, the process shifts to S130 again.
When an affirmative determination is made in S160 and the process proceeds to S180, the control device 110 instructs the user of the calibration device 100 that calibration processing (calculation of correction parameters) in all the sensor devices S1 to SX is completed. Inform. Examples of the notification method include a method of displaying a completion message on a display device and a method of outputting a completion message from a speaker.

The control device 110 repeatedly executes the processing of setting the correction parameters for the X sensor devices S1 to SX by repeatedly executing the processing of S130 to S170.
When S180 is completed, the calibration process ends.

  As described above, the control device 110 has a function as a calibration control unit that transmits and receives various information to and from the plurality of sensor devices S1 to SX based on the unique address. In addition, the control device 110 acquires initial values (characteristic information) from each of the plurality of sensor devices S1 to SX based on the unique address, and performs correction parameters calculated based on the initial values to the plurality of sensor devices S1 to SX. Function as a calibration control unit to transmit to each of

[1-4. Operation]
The communication state of the control device 110 and the sensor devices S1 to S3 and SX at the time of execution of the calibration process by the control device 110 will be described using the timing chart of FIG.

  When the control device 110 transmits a command signal to the address 1 at time t1, communication is performed between the control device 110 and the sensor device S1 during a period from time t1 to time t4, and calibration of the sensor device S1 is performed. Event takes place.

  In FIG. 5, each state is schematically represented, and a period from time t1 to t2 represents a transmission state from the control device 110 to the sensor device S1, and a period from time t2 to t3 is The reply state from the sensor device S1 to the control device 110 is shown. In actual communication, various information is transmitted and received between the control device 110 and the sensor device S1 by performing not only one-reciprocation communication as shown in FIG. 5 but also two-way communication.

  Thereafter, when the control device 110 transmits a command signal to the address 2 at time t4, communication between the control device 110 and the sensor device S2 is performed in a period from time t4 to time t7, and the sensor device S2 is Calibration is performed. Similarly, when control device 110 transmits a command signal to address 3 at time t7, calibration of sensor device S3 is performed.

  Thereafter, calibration processing of a plurality of sensor devices Sn is sequentially performed, and after the control device 110 starts calibration of the sensor device SX at the address X at time t10, transmission and reception of various information is performed and the sensor device When the calibration of SX is completed, the calibration process of all the sensor devices S1 to SX is completed.

[1-5. effect]
According to the first embodiment described above, the following effects can be obtained.
When X sensor devices S1 to SX are connected, the calibration device 100 supplies the converted voltages Vdc of different voltage values to the plurality of sensor devices S1 to SX, thereby a plurality of sensor devices S1 to SX. A different unique address can be set for each of.

  As a result, when transmitting and receiving various types of information to and from the plurality of sensor devices S1 to SX, the calibration device 100 does not consider the distance from the calibration device 100 to the sensor devices S1 to SX, and targets the unique address. Objects can be distinguished, and calibration processing can be appropriately performed and parameter values can be set for each of a plurality of objects.

[1-6. Correspondence of wording]
Here, the correspondence relationship of words is demonstrated.
The calibration apparatus 100 corresponds to a calibration apparatus, the control apparatus 110 that executes S110 and the voltage setting units VS1 to VSX correspond to a voltage supply unit, the converted voltage Vdc corresponds to a supply voltage, and the initial value is characteristic information The correction parameter corresponds to the parameter value, and the control device 110 that executes S130 to S150 corresponds to the calibration control unit.

  The X sensor devices S1 to SX correspond to a plurality of objects, the sensor control unit 121 (MCU 121) corresponds to a communication unit and an address setting unit, and the sensor control unit 121 (MCU 121) and the voltage determination unit 127 determine voltages. It corresponds to the department.

S110 corresponds to a voltage supply step, and S130 to S150 correspond to a calibration control step.
[2. Other embodiments]
As mentioned above, although embodiment of this indication was described, this indication is not limited to the above-mentioned embodiment, It is possible in the range which does not deviate from the gist of this indication to carry out in various modes.

  For example, in the above embodiment, the calibration device includes two connectors (a communication connector CSAn, a voltage connector CVAn) for one sensor device. However, the present invention is not limited to such a configuration. For example, a configuration in which the communication connector CSAn and the voltage connector CVAn are integrated into one connector may be employed.

  The calibration device (specifically, the control device) is not limited to the configuration that executes the calibration process with a plurality of sensor devices connected to all of the X connectors, and the X connectors The calibration process may be performed in a state where a plurality of sensor devices are connected to a part.

  The object to be connected to the calibration device is not limited to the sensor device as described above, and another object requiring calibration is one that performs communication by setting a unique address for communication. It may be a thing.

  Next, the function of one component in the above embodiment may be shared by a plurality of components or the function of a plurality of components may be performed by one component. Further, part of the configuration of the above embodiment may be omitted. In addition, at least a part of the configuration of the above-described embodiment may be added to or replaced with the configuration of the other above-described embodiment. In addition, all the aspects contained in the technical thought specified from the wording as described in a claim are an embodiment of this indication.

  In addition to the computer system described above, a host system having the computer system as a component, a program for causing the computer to function as the computer system, a non-transient actual recording medium such as a semiconductor memory storing the program, and a concentration calculation method The present disclosure can also be implemented in various forms.

  DESCRIPTION OF SYMBOLS 100 ... Calibration apparatus, 110 ... Control apparatus, 121 ... Sensor control part, 123 ... Regulator, 125 ... Detection part, 127 ... Voltage determination part, 129 ... Internal communication line, 150 ... Communication line, 151 ... Voltage supply line, CSA1 ~ CSAX ... communication connector, CSB1-CSBX ... communication connector, CVA1-CVAX ... voltage connector, CVB1-CVBX ... voltage connector, PS1-PSX ... connection point, PV1-PVX ... connection point, S1-SX ... sensor device, VS1- VSX ... voltage setting unit.

Claims (3)

A calibration apparatus that is connected to a plurality of objects and performs calibration of the plurality of objects.
The plurality of objects respectively have a communication unit that performs communication using a unique address, a voltage determination unit that determines a voltage value of a supply voltage supplied from the outside, and the unique value based on the voltage value of the supply voltage. An address setting unit for setting an address;
The calibration device
A voltage supply unit configured to set the unique address by supplying supply voltages of different voltage values to each of the plurality of objects;
The characteristic information corresponding to the unique address is acquired from each of the plurality of objects via the communication unit, and the object is set with the characteristic address corresponding to the characteristic information, the parameter value calculated for each of the characteristic information A calibration control unit that transmits to the object;
Equipped with
Calibration device. A calibration method in which a plurality of objects are connected and calibration of the plurality of objects is performed,
The plurality of objects respectively have a communication unit that performs communication using a unique address, a voltage determination unit that determines a voltage value of a supply voltage supplied from the outside, and the unique value based on the voltage value of the supply voltage. An address setting unit for setting an address;
The calibration method is
A voltage supply step in which the unique address is set by supplying supply voltages of different voltage values to each of the plurality of objects;
The characteristic information corresponding to the unique address is acquired from each of the plurality of objects via the communication unit, and the object is set with the characteristic address corresponding to the characteristic information, the parameter value calculated for each of the characteristic information Calibration control steps to send to objects;
Equipped with
Calibration method. A method of manufacturing a sensor device for detecting the state of an environmental atmosphere, comprising:
It has a calibration process of performing calibration for adjusting individual differences in sensor output accuracy in a plurality of the sensor devices,
The plurality of sensor devices respectively have a communication unit that performs communication using a unique address, a voltage determination unit that determines a voltage value of a supply voltage supplied from the outside, and the unique value based on the voltage value of the supply voltage. An address setting unit for setting an address;
In the calibration step, calibration is performed using the calibration method according to claim 2.
Method of manufacturing sensor device.