JP6915554B2 - Transmitter / receiver and vehicle - Google Patents

Description

The technology disclosed herein relates to a transmitter / receiver and a vehicle having a plurality of devices capable of communicating with each other.

At the development site of a vehicle, a plurality of sensors for detecting the state of the vehicle may be attached to various parts of the vehicle in order to investigate changes in the state of the vehicle over time (see Patent Documents 1 and 2). In Patent Document 1, the sensor is connected to the data collecting device by a signal line. In Patent Document 2, the detected data is wirelessly transmitted from the sensor to the data collecting device.

Japanese Unexamined Patent Publication No. 2013-2538998 Japanese Unexamined Patent Publication No. 2008-164467

Whether the data is communicated by wire or wirelessly, the detection data continuously acquired by each sensor will be collected by the data collection device and then compared with each other. That is, changes over time in the state are compared between the parts of the vehicle to which the respective sensors are attached. In this case, it is preferable that the timing at which the detection data is acquired by each sensor coincides with each other. However, in reality, each sensor acquires detection data at a timing based on individually generated clock signals. Therefore, the acquisition timings of the detection data in each sensor are usually different from each other. This deviation increases over time.

It is an object of the technique disclosed herein to provide a transmission / reception device and a vehicle capable of suppressing an excessive increase in the deviation of the acquisition timing of detection data in each sensor.

One aspect of the technology disclosed herein is:
A transmission / reception device including a master unit and a first slave unit and a second slave unit configured to be able to communicate with the master unit, respectively.
The first slave unit is
A first state detection unit that outputs first state data indicating the state of the first mounting location, and
1st memory and
The first oscillator that outputs the clock signal and
A first counter whose count value is counted up in the first sampling cycle generated by using the clock signal output from the first oscillator, and
The first state data is acquired for each count-up of the first count value, which is the count value of the first counter, and is stored in the first storage unit in association with the counted-up first count value. 1 Data control unit and
The second handset is
A second state detection unit that outputs second state data representing the state of the second mounting place different from the first mounting place, and
Second memory and
The second oscillator that outputs the clock signal and
A second counter whose count value is counted up in the second sampling cycle generated by using the clock signal output from the second oscillator, and
The second state data is acquired for each count-up of the second count value, which is the count value of the second counter, and is stored in the second storage unit in association with the counted-up second count value. 2 Data control unit and
The master unit simultaneously transmits the first count value and the synchronization signal for resetting the second count value to the first slave unit and the second slave unit in a predetermined synchronization cycle. Including the collection control unit
When the first slave unit receives the synchronization signal, the first data control unit resets the first count value.
The second data control unit resets the second count value when the second slave unit receives the synchronization signal.

In this embodiment, the period of the clock signal output from the first oscillator and the period of the clock signal output from the second oscillator usually vary, so that even if the same product is used, they are strictly equal. Not a value. Therefore, even if the first sampling cycle and the second sampling cycle are set to the same value, the acquisition timing of the first state data and the acquisition timing of the second state data shift as time elapses.

Therefore, in this embodiment, the first slave unit resets the first count value when the synchronization signal is received, and the second slave unit resets the second count value when the synchronization signal is received. Therefore, even if the acquisition timing of the first state data and the acquisition timing of the second state data are different, the first count value and the second count value will be different when the synchronization signal transmitted from the master unit is received. It will be reset at the same time and will match. Therefore, according to this aspect, it is possible to suppress an excessive increase in the deviation between the acquisition timing of the first state data and the acquisition timing of the second state data.

In the above aspect, for example, the data collection control unit may transmit a data request signal requesting transmission of the first state data to the first slave unit, and the first data control unit may transmit the data request signal. When the synchronization signal is received, the synchronization flag indicating the reception timing of the synchronization signal may be stored in the first storage unit in association with the first state data stored in the first storage unit, and the data request may be performed. Upon receiving the signal, the synchronization flag, all the first state data, and the first count value stored in the first storage unit may be transmitted to the master unit, and the data may be transmitted. The collection control unit may specify the data number count value, which is the first count value immediately before the reset, based on the synchronization flag, and should be stored in the first sampling cycle during the synchronization cycle. When the number of regular data, which is the number of data of the first state data, and the count value of the number of data are different, the first state data is corrected and the number of data of the first state data matches the number of regular data. You may let me.

In this embodiment, when the number of regular data, which is the number of data of the first state data to be stored in the first sampling cycle, and the data number count value are different during the synchronization cycle, the first state data is corrected. Therefore, the number of data of the first state data is matched with the number of regular data. Therefore, according to this aspect, the number of data of the first state data in the first slave unit can always be unified to the number of regular data.

In the above aspect, for example, the first data control unit has a number of regular data, which is the number of data of the first state data to be stored in the first sampling cycle during the synchronization cycle, and a number of regular data immediately before reset. When the data number count value, which is the first count value, is different, the first state data may be corrected so that the number of data of the first state data matches the number of regular data.

In this embodiment, when the number of regular data, which is the number of data of the first state data to be stored in the first sampling cycle, and the data number count value are different during the synchronization cycle, the first state data is corrected. Therefore, the number of data of the first state data is matched with the number of regular data. Therefore, according to this aspect, the number of data of the first state data in the first slave unit can always be unified to the number of regular data.

In the above aspect, for example, the difference between the regular data number and the data number count value may be calculated, or the division size obtained by adding 1 to the absolute value of the difference may be calculated, and the data number count may be calculated. The division position obtained by dividing the value by the division size may be calculated, or the first state data to be corrected may be determined based on a multiple of the division position.

In this embodiment, the difference between the number of regular data and the count value of the number of data represents the number of first state data to be corrected in order to match the number of data of the first state data with the number of regular data. For example, if the data number count value is larger than the regular data number, the first state data may be reduced by the difference. On the other hand, if the data number count value is smaller than the regular data number, the first state data may be increased by the difference.

A division size obtained by adding 1 to the absolute value of the difference, and a multiple of the division position obtained by dividing the data number count value represents a position where the first state data to be corrected are evenly separated. For example, if the difference is 2, the division size is 3. Therefore, for example, if the data number count value is 30, the division position is 10. Therefore, the tenth first state data and the twentieth first state data may be corrected. Thus, according to this aspect, the corrected first state data are determined at evenly separated positions. As a result, the adverse effect of the correction can be reduced as much as possible.

In this embodiment, the data collection control unit calculates the difference between the regular data number and the data number count value, adds 1 to the absolute value of the difference to calculate the division size, and calculates the data number count value. The division position may be calculated by dividing the above division size by the division size, and the first state data to be corrected may be determined based on a multiple of the division position. Alternatively, the first data control unit calculates the difference between the number of regular data and the count value of the number of data, adds 1 to the absolute value of the difference to calculate the division size, and counts the number of data. The division position obtained by dividing the value by the division size may be calculated, and the first state data to be corrected may be determined based on a multiple of the division position.

In the above aspect, for example, the data collection control unit may generate a stop notification signal for notifying that the operating master unit stops operating, and the master unit may generate a stop notification signal for which the stop notification signal is the first. The operation may be stopped after being transmitted to one slave unit, and the first data control unit sets the first sampling cycle to the sampling cycle Tc1 before the stop notification signal is transmitted from the master unit. After the stop notification signal is transmitted from the master unit, the first sampling cycle may be set to a sampling cycle Tc2 longer than the sampling cycle Tc1.

In this embodiment, the first state data is stored in the first storage unit in the sampling cycle Tc1 before the operation of the master unit is stopped, and after the operation of the master unit is stopped, the first state data is stored in the first state data in the sampling cycle Tc2 longer than the sampling cycle Tc1. Is stored in the first storage unit. Therefore, according to this aspect, the first state data can be stored in the first storage unit while reducing the power consumption of the first slave unit while the master unit is stopped.

In the above aspect, for example, the data collection control unit may generate a restart notification signal for notifying that the master unit has resumed operation after the operation is stopped, and the master unit operates after the operation is stopped. When restarting, the restart notification signal may be transmitted to the first slave unit, and the first data control unit operates the first data control unit when the stop notification signal is transmitted from the master unit. No sleep mode is entered, and the sleep mode is temporarily shifted to the normal mode in which the first data control unit operates at predetermined time intervals to determine whether or not the restart notification signal is transmitted from the master unit. You may judge.

In this aspect, the first data control unit shifts to the sleep mode when the stop notification signal is transmitted from the master unit, temporarily shifts from the sleep mode to the normal mode at predetermined time intervals, and the restart notification signal is the parent. Determine if it is being transmitted from the machine. Therefore, according to this aspect, it is possible to determine the restart of the operation of the master unit while reducing the power consumption of the first data control unit while the master unit is stopped.

In the above aspect, for example, the first state detection unit and the second state detection unit may each include a corrosion sensor that outputs a current value according to the degree of corrosion of the mounting location as the state data.

In this aspect, the first state detection unit and the second state detection unit each include a corrosion sensor that outputs a current value according to the degree of corrosion of the mounting location as state data. When the master unit is stopped, the current value according to the degree of corrosion is stored in the first storage unit as the first state data in the sampling cycle Tc2. Even while the base unit is stopped, the degree of corrosion at the mounting location continues. Therefore, according to this aspect, the current value according to the degree of corrosion that progresses can be continuously stored in the first storage unit even while the operation of the master unit is stopped.

Other aspects of the technology disclosed herein are:
A vehicle equipped with the transmission / reception device of the above aspect.
The vehicle
In-vehicle battery and
The ignition switch that starts the operation of the vehicle and
A cigarette lighter socket in which power is supplied from the vehicle-mounted battery when the ignition switch is turned on, and power supply from the vehicle-mounted battery is stopped when the ignition switch is turned off.
With more
The master unit is connected to the cigarette lighter socket.

In this embodiment, the master unit is connected to a cigarette lighter socket in which power is supplied from the vehicle-mounted battery when the ignition switch is turned on and power supply from the vehicle-mounted battery is stopped when the ignition switch is turned off. .. Therefore, according to this aspect, since the operation of the master unit is stopped while the ignition switch is off, it is possible to prevent the power loss of the in-vehicle battery.

According to this transmission / reception device, even if the acquisition timing of the first state data and the acquisition timing of the second state data are different, the first count value and the first count value are obtained when the synchronization signal transmitted from the master unit is received. Since the two count values are reset at the same time and match, it is possible to suppress an excessive increase in the deviation between the acquisition timing of the first state data and the acquisition timing of the second state data.

It is a block diagram which shows the structure of the vehicle which includes the transmission / reception device of 1st Embodiment. It is a figure which shows schematic arrangement example of each part in a vehicle. It is a sequence diagram which shows an example of the operation of each wireless transmission device and data collection device. It is a sequence diagram which shows an example of the operation of each wireless transmission device and data collection device. It is a sequence diagram which shows an example of the operation of each wireless transmission device and data collection device. It is a sequence diagram which shows typically an example of the procedure of transmitting the detection data from each wireless transmission device of a slave unit to a data collection device. It is a flowchart which shows typically an example of the correction procedure of data executed in a data collection apparatus. It is a figure which shows typically the 1st example of the data correction in a data collecting apparatus. It is a figure which shows the calculation result of each value such as the number of regular data in the example of FIG. It is a figure which shows typically the 2nd example of the data correction in a data collecting apparatus. It is a figure which shows the calculation result of each value such as the number of regular data in the example of FIG. It is a figure which shows typically the 3rd example of the data correction in a data collecting apparatus. It is a figure which shows the calculation result of each value such as the number of regular data in the example of FIG. It is a figure which shows typically the 4th example of the data correction in a data collecting apparatus. It is a figure which shows the calculation result of each value such as the number of normal data in the example of FIG. It is a figure which shows schematic 5th example of the data correction in a data collecting apparatus. It is a figure which shows the calculation result of each value such as the number of regular data in the example of FIG. FIG. 5 is a sequence diagram schematically showing an example of the operation of each wireless transmission device and data collection device of the slave unit in the second embodiment.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In each figure, similar elements are designated by the same reference numerals, and description thereof will be omitted as appropriate.

(First Embodiment)
FIG. 1 is a block diagram schematically showing a configuration of a vehicle 1 including the transmission / reception device of the first embodiment. FIG. 2 is a diagram schematically showing an arrangement example of slave units 4, 5, 6 and 7, which are provided with a wireless transmission device 10 and a detection unit 20, a data collection device 30, and an antenna unit 40, respectively.

(Constitution)
The vehicle 1 shown in FIG. 1 is, for example, a four-wheeled vehicle. As shown in FIG. 1, the vehicle 1 includes a slave unit 4, 5, 6, 7, a data collection device (corresponding to an example of a master unit) 30, an antenna unit 40, an in-vehicle battery 42, an ignition switch 44, and a cigarette lighter socket. It includes 46, a secondary battery 48, and an electronic control unit (ECU) 50. The slave units 4, 5, 6 and 7, respectively, include a wireless transmission device 10 and a detection unit 20.

This vehicle 1 is for evaluating the performance of a vehicle by using a large number of sensors attached to the vehicle at a vehicle development site. In the present embodiment, the detection unit 20 includes a corrosion sensor 21 and a temperature / humidity sensor 22 as such sensors. The corrosion sensor 21 is connected to the wireless transmission device 10 by a connection cable 23, and the temperature / humidity sensor 22 is connected to the wireless transmission device 10 by a connection cable 24. The antenna unit 40 is connected to the data collection device 30 by a connection cable 41. The vehicle 1 is configured such that the detection data of the detection unit 20 is wirelessly transmitted by the wireless transmission device 10 and stored in the data collection device 30 via the antenna unit 40.

The corrosion sensor 21 (an example of the state detection unit) detects the degree of corrosion at the place where the corrosion sensor 21 is attached in the vehicle 1. The corrosion sensor 21 may be a general sensor element capable of detecting the degree of corrosion of the vehicle 1. As the corrosion sensor 21, for example, an atmospheric corrosion monitor (ACM) type corrosion sensor may be used.

The temperature / humidity sensor 22 detects the temperature and humidity of the place where the temperature / humidity sensor 22 is attached in the vehicle 1. A general detection element may be used as the temperature / humidity sensor 22. As the temperature detecting element of the temperature / humidity sensor 22, for example, a known platinum resistance temperature detector may be used. As the humidity detection element of the temperature / humidity sensor 22, for example, a known polymer capacitance type humidity detection element may be used.

In FIG. 2, the detection unit 20 of the slave unit 4 is attached to, for example, the engine room of the vehicle 1. The detection unit 20 of the slave unit 5 is attached to, for example, the front wheel house of the vehicle 1. The detection unit 20 of the slave unit 6 is attached to, for example, the outer plate of the lift gate of the vehicle 1. The detection unit 20 of the slave unit 7 is attached to, for example, the undercover of the engine of the vehicle 1. The wireless transmission devices 10 of the slave units 4 to 7 connected to the detection units 20 of the slave units 4 to 7 by the connection cables 23 and 24, respectively, are attached in the vicinity of the detection units 20. The data collecting device 30 is arranged, for example, in the trunk room 2 of the vehicle 1. The antenna unit 40 is arranged on the ceiling of the interior front portion 3 of the vehicle 1, for example.

Returning to FIG. 1, the wireless transmission device 10 wirelessly transmits the detection data of the detection unit 20 to the data collection device 30. Hereinafter, the data collection device 30 is also referred to as a “master unit”.

The wireless transmission device 10 includes a memory 11, a central processing unit (CPU) 12, an antenna unit 13, a battery 14, an oscillator 15, and the like. The antenna unit 13 is controlled by the CPU 12, and in the present embodiment, for example, it transmits data or the like by radiating a radio wave having a frequency of 2.4 GHz with a power of 3 mW. The antenna unit 13 receives a request signal or the like transmitted from the antenna unit 40. The battery 14 supplies electric power for operating the memory 11, the CPU 12, the corrosion sensor 21, and the temperature / humidity sensor 22. The oscillator 15 includes, for example, a ceramic oscillator, a frequency divider circuit, and the like, and generates a clock signal for operating the CPU 12.

The memory 11 (an example of a storage unit) of the wireless transmission device 10 is composed of, for example, a semiconductor memory such as a flash memory or another storage element. The memory 11 includes a memory for temporarily storing the detection data detected by the detection unit 20, a memory for storing a program, and the like. The memory 11 may be composed of a single memory element including an area for temporarily storing the detection data detected by the detection unit 20 and an area for storing the program.

As described above with reference to FIG. 2, the slave units 4 to 7 are attached to four different locations of the vehicle 1, respectively. Therefore, the memory 11 of the wireless transmission device 10 of the slave units 4 to 7 stores in advance a unique slave unit ID that identifies the wireless transmission device 10 of the slave units 4 to 7, respectively.

The CPU 12 functions as a data control unit 120, a mode control unit 121, and a counter 122 by operating according to a program stored in the memory 11. The data control unit 120 functions as a detection control unit 12a and a communication control unit 12b. The counter 122 counts up the count value in the sampling period (described later) set by the detection control unit 12a based on the clock signal generated by the oscillator 15.

The detection control unit 12a acquires the corrosion data detected by the corrosion sensor 21 via the connection cable 23. The detection control unit 12a acquires the temperature data and the humidity data detected by the temperature / humidity sensor 22 via the connection cable 24. The detection control unit 12a acquires corrosion data, temperature data, and humidity data at the timing when the count value of the counter 122 is counted up. The detection control unit 12a stores the acquired corrosion data, temperature data, and humidity data in the memory 11 in association with the count value of the counter 122 when the corrosion data, temperature data, and humidity data are acquired. In the following, corrosion data, temperature data and humidity data may be collectively referred to as "detection data".

When the communication control unit 12b receives the request signal for transmitting the detection data (corrosion data, temperature data, and humidity data in this embodiment) transmitted from the data collection device 30, the communication control unit 12b is stored in the memory 11. , Detection data, slave unit ID, etc. are generated. The communication control unit 12b transmits the generated transmission signal from the antenna unit 13.

The mode control unit 121 controls the operation mode of the CPU 12 (data control unit 120). The mode control unit 121 controls the CPU 12 into a normal mode in which normal operations are performed and a sleep mode in which the minimum necessary operations are performed.

The mode control unit 121 first shifts the CPU 12 from the normal mode to the sleep mode. The mode control unit 121 counts the elapsed time in the sleep mode based on the clock signal from the oscillator 15, and shifts the CPU 12 to the normal mode in a predetermined sampling cycle. In the normal mode, the detection control unit 12a performs a predetermined operation. When the predetermined operation is completed, the mode control unit 121 shifts the CPU 12 to the sleep mode. The mode control unit 121 extends the life of the battery 14.

The mode control unit 121 operates the CPU 12 in the power-on mode when the data collection device 30 is in operation. The mode control unit 121 operates the CPU 12 in the power-off mode when the operation of the data collection device 30 is stopped. The sampling cycle is the sampling cycle Tc1 in the power-on mode and the sampling cycle Tc2 in the power-off mode, which are different from each other. Specific examples of sampling cycles Tc1 and Tc2 will be described in detail later.

Here, the acquisition timing of the detection data of each detection unit 20 by each detection control unit 12a in the slave units 4 to 7 will be described. As described above, the detection control unit 12a acquires corrosion data, temperature data, and humidity data at the timing when the count value of the counter 122 is counted up. Further, the counter 122 counts up the count value based on the clock signal generated by the oscillator 15. Further, the oscillator 15 includes, for example, a ceramic oscillator, a frequency divider circuit, and the like, and generates a clock signal for operating the CPU 12.

Ceramic oscillators have lower oscillation frequency accuracy than crystal oscillators. However, due to its low cost, ceramic oscillators are generally used except for applications that require a high-precision oscillation frequency, such as watches. According to the specifications of the ceramic oscillator used in the first embodiment, there is a deviation of up to 10.45 seconds per 24 hours between the slave units 4 to 7. Therefore, for example, if the sampling cycle for acquiring the detected data is set to 10 seconds, the number of times the detected data is acquired will be deviated by one or more times after 24 hours or more. Therefore, in the first embodiment, the number of detected data does not become inconsistent between the slave units 4 to 7 due to the difference in the number of times the detected data is acquired.

Returning to FIG. 1, the antenna unit 40 receives the radio waves radiated from the antenna unit 13 to detect the detection data (corrosion data, temperature data, and humidity data in this embodiment) of the detection unit 20, and the slave unit ID. The above transmission signal including the above is received. As described above, the antenna unit 40 is connected to the data collection device 30 by the connection cable 41.

The data collecting device 30 collects the detection data (corrosion data, temperature data, and humidity data in this embodiment) of the detection unit 20. The data collection device 30 includes a memory 31, a CPU 32, and other peripheral circuits. The data collection device 30 is composed of, for example, a personal computer.

The memory 31 is composed of, for example, a semiconductor memory such as a flash memory, a hard disk, or another storage element. The memory 31 includes a memory for storing the data detected by the detection unit 20, a memory for storing the data collection program, a memory for temporarily storing the data, and the like. The memory 31 may be composed of a single memory element including an area for storing the data detected by the detection unit 20, an area for storing the data collection program, and an area for temporarily storing the data. .. The memory 31 stores the slave unit IDs of the slave units 4 to 7 in advance.

The CPU 32 functions as the data collection control unit 33 by operating according to the data collection program stored in the memory 31. The data collection control unit 33 transmits a request signal requesting transmission of the detected data to each of the wireless communication devices 10 of the slave units 4 to 7 via the antenna unit 40.

When the ignition switch 44 is turned off, the data collection control unit 33 generates an instruction signal instructing the mode change from the power-on mode to the power-off mode. The data collection control unit 33 controls the transmission of the instruction signal to each of the wireless transmission devices 10 of the slave units 4 to 7. When the ignition switch 44 is turned on after the ignition switch 44 is turned off, the data collection control unit 33 gives a preparation signal instructing each wireless transmission device 10 of the slave units 4 to 7 to prepare for data collection. To generate. The data collection control unit 33 controls the transmission of the preparation signal to each of the wireless transmission devices 10 of the slave units 4 to 7.

The data collection control unit 33 transmits a synchronization signal to each of the wireless transmission devices 10 of the slave units 4 to 7 in a predetermined synchronization cycle Tc3. The data collection control unit 33 stores the detection data (corrosion data, temperature data, and humidity data in this embodiment) of the detection unit 20 received by the antenna unit 40 in the memory 31 for each slave unit ID. The data collection control unit 33 corrects the detected data so that the numbers of detected data transmitted from the wireless transmission devices 10 of the slave units 4 to 7 match each other. Specific examples of correction of detection data will be described in detail later.

In the present embodiment, the instruction signal is an example of a stop notification signal for notifying that the operating data collection device 30 stops operating. In the present embodiment, the preparation signal is an example of a restart notification signal for notifying that the data collection device 30 has resumed operation after the operation is stopped.

The in-vehicle battery 42, the ignition switch 44, and the cigarette lighter socket 46 are all well-known configurations mounted on a general vehicle. The cigarette lighter socket 46 is connected to the positive electrode of the secondary battery 48, and the positive electrode of the secondary battery 48 is connected to the data collecting device 30.

The cigarette lighter socket 46 is connected to the vehicle-mounted battery 42 via the ignition switch 44. Therefore, the vehicle-mounted battery 42 charges the secondary battery 48 via the cigarette lighter socket 46 only while the ignition switch 44 is on (while the engine of the vehicle 1 is operating). In the present embodiment, the secondary battery 48 is configured to be able to supply electric power to the data collecting device 30 regardless of whether the ignition switch 44 is turned on or off (that is, the operating state of the engine of the vehicle 1).

The ECU 50 controls the overall operation of the vehicle 1. The ECU 50 detects the on / off of the ignition switch 44. The ECU 50 notifies the CPU 32 (data collection control unit 33) of the data collection device 30 of the detected on / off state of the ignition switch 44. In other words, the CPU 32 (data collection control unit 33) of the data collection device 30 determines the on / off state of the ignition switch 44 based on the signal output from the ECU 50. The ECU 50 and the CPU 32 of the data collection device 30 may be directly connected by wire or wirelessly, or may be indirectly connected via another controller (CPU).

(motion)
3 to 5 are sequence diagrams schematically showing an example of the operation of each wireless transmission device 10 and data collection device 30 (master unit) of the slave units 4 to 7.

In step S1000 of FIG. 3, for example, the user turns on the power of the wireless transmission device 10. In step S2000, for example, after the ignition switch 44 is turned on by the user, the data acquisition device 30 is turned on in step S3000.

For example, when the secondary battery 48 is connected to the data collection device 30 by the user and the power supply from the secondary battery 48 to the data collection device 30 is started, the power of the data collection device 30 is turned on. It may be configured. Alternatively or additionally, the data collection device 30 may be configured to be powered on when the power switch provided in the data collection device 30 is turned on by the user.

In step S3010, the data collection control unit 33 of the data collection device 30 transmits a preparation signal instructing preparation for data collection to each wireless transmission device 10 of the slave units 4 to 7.

In step S1010, the communication control unit 12b of the data control unit 120 of each wireless transmission device 10 of the slave units 4 to 7 starts preparing for data collection. In step S1020, the communication control unit 12b transmits a response signal including the slave unit ID and the initial signal indicating that the power is turned on to the data collection device 30. In step S3020, the data collection control unit 33 of the data collection device 30 confirms the response signal including the slave unit ID and the initial signal transmitted from each wireless transmission device 10 of the slave units 4 to 7.

In step S3030, the data collection control unit 33 of the data collection device 30 transmits a start signal instructing the start of data collection to the wireless transmission device 10 corresponding to the responding slave unit ID. In step S1030, the communication control unit 12b of the data control unit 120 of the wireless transmission device 10 that has received the start signal transmits the response signal including the slave unit ID to the data collection device 30 and receives the start signal. Notify the mode control unit 121.

In step S3040, the data collection control unit 33 of the data collection device 30 confirms the response signal transmitted from each wireless transmission device 10 of the slave units 4 to 7. In step S1040, the mode control unit 121 shifts the CPU 12 to the sleep mode upon receiving the notification that the start signal has been received. Further, the mode control unit 121 resets the count value of the counter 122 and starts the counting operation of the counter 122 from 0.

Subsequent steps S2100 are repeated at a predetermined power-on mode sampling cycle Tc1 (in this embodiment, for example, Tc1 = 10 seconds). In the power-on mode, the detection control unit 12a counts up the count value of the counter 122 in the sampling cycle Tc1. Step S2100 is executed every time the count value of the counter 122 is counted up. When the count value of the counter 122 is counted up, first, in step S1050, the mode control unit 121 shifts the CPU 12 to the normal mode. In step S1060, the detection control unit 12a supplies power from the battery 14 to the corrosion sensor 21 and the temperature / humidity sensor 22 to operate, and acquires the detection data (corrosion data, temperature data, and humidity data) of the detection unit 20. The detection control unit 12a stores the acquired detection data in the memory 11 in association with the count value of the counter 122. In step S1070, the mode control unit 121 of each wireless transmission device 10 of the slave units 4 to 7 shifts the CPU 12 to the sleep mode.

Step S2150 following step S3040 is repeated with a predetermined sampling period Tc3 (in this embodiment, for example, Tc3 = 24 hours). First, in step S3050, the data collection control unit 33 of the data collection device 30 transmits a synchronization signal to each wireless transmission device 10 of the slave units 4 to 7. When the synchronization signal from the data collecting device 30 is received in step S1080, the detection control unit 12a of the data control unit 120 of each wireless transmission device 10 of the slave units 4 to 7 resets the count value of the counter 122.

In step S1090, the detection control unit 12a writes a synchronization flag (described later) in the detection information including the detection data stored in the memory 11. In step S1092, the communication control unit 12b of the data control unit 120 of each wireless transmission device 10 of the slave units 4 to 7 transmits a response signal including the slave unit ID to the data collection device 30. After the response signal is transmitted (step S1092), the process proceeds to step S1070. In step S3060, the data collection control unit 33 of the data collection device 30 confirms the response signal transmitted from each wireless transmission device 10 of the slave units 4 to 7.

In each of the wireless transmitters 10 of the slave units 4 to 7, the above step S2100 is executed in the sampling cycle Tc1 of the power-on mode. Further, in the data collecting device 30, the above step S2150 is executed in the sampling cycle Tc3.

As described above, in step S2100 repeated in the sampling cycle Tc1 of each of the wireless transmission devices 10 of the slave units 4 to 7, when the synchronization signal is not transmitted from the data collection device 30, step S1070 is executed following step S1060. NS. On the other hand, when the synchronization signal is transmitted from the data collecting device 30 in step S2100, step S1080, S1090, and S1092 are executed following step S1060, and then step S1070 is executed.

Subsequently, in step S2200 of FIG. 4, the ignition switch 44 is turned off by the user. On the other hand, also at this time, in the wireless transmission device 10, the step S2100 is executed in the sampling cycle Tc1 in the power-on mode (for example, Tc1 = 10 seconds in this embodiment).

When the data collection control unit 33 of the data collection device 30 determines that the ignition switch 44 has been turned off based on the output signal from the ECU 50, in step S3100, an instruction to instruct the mode change from the power on mode to the power off mode. Generate a signal. The data collecting device 30 transmits the above-mentioned instruction signal to each wireless transmitting device 10 of the slave units 4 to 7.

When the instruction signal (step S3100) from the data collection device 30 is received after the wireless transmission device 10 shifts to the normal mode (step S1050), in step S1110, the mode control unit 121 of the wireless transmission device 10 sets the CPU 12 to the CPU 12. Change to power off mode. In step S1120, the communication control unit 12b of the data control unit 120 of each wireless transmission device 10 of the slave units 4 to 7 transmits a response signal including the slave unit ID to the instruction signal of step S3100 to the data collection device 30. .. In step S1130, the CPU 12 (data control unit 120) of each wireless transmission device 10 of the slave units 4 to 7 shifts to the sleep mode by the mode control unit 121.

In step S3120, the data collection control unit 33 of the data collection device 30 confirms the response signal transmitted from each wireless transmission device 10 of the slave units 4 to 7. Then, in step S3130, the power of the data collecting device 30 is turned off.

For example, based on the output signal from the ECU 50, the data collection control unit 33 determines that the ignition switch 44 has been turned off, and when the processes of steps S3100 and S3120 are normally completed, the power of the data collection device 30 is automatically turned off. It may be configured to be. Alternatively, when the user instructs the data collection device 30 to end the data collection program during the operation of the data collection program stored in the memory 31, the power of the data collection device 30 is turned off. It may be configured as follows. In place of or in addition to these configurations, the data collection device 30 may be configured to be powered off when the power switch provided in the data collection device 30 is turned off by the user.

While the power of the data collecting device 30 is off, the CPU 12 of each wireless transmitting device 10 of the slave units 4 to 7 repeats the operation of step S2300 every predetermined time (for example, 30 seconds in this embodiment). That is, the mode control unit 121 shifts the CPU 12 (data control unit 120) to the normal mode (step S1140). The CPU 12 (data control unit 120) waits for a predetermined time (for example, 5 seconds), and the communication control unit 12b of the data control unit 120 receives data as a preparation signal transmitted when the power of the data collection device 30 is turned on. It is determined whether or not the data is transmitted from the collection device 30 (step S1150). If the preparation signal has not been transmitted from the data acquisition device 30, the mode control unit 121 shifts the CPU 12 (data control unit 120) to the sleep mode (step S1160).

Further, in the power-off mode in which the power of the data collecting device 30 is off, the CPU 12 of each wireless transmission device 10 of the slave units 4 to 7 performs the operation of step S2400 in the sampling cycle Tc2 in the power-off mode (for example, Tc2 in this embodiment). = 30 minutes). In the power-off mode, the count value of the counter 122 is counted up in the sampling cycle Tc2. Step S2400 is executed every time the count value of the counter 122 is counted up. First, the mode control unit 121 shifts the CPU 12 to the normal mode (step S1170). The detection control unit 12a supplies power from the battery 14 to the corrosion sensor 21 and the temperature / humidity sensor 22 to operate the sensor, acquires the detection data (corrosion data, temperature data, and humidity data) of the detection unit 20, and acquires the detection data. Is stored in the memory 11 in association with the count value of the counter 122 (step S1180). After that, the mode control unit 121 shifts the CPU 12 to the sleep mode (step S1190). By this step S2400, while the operation of the data collecting device 30 is stopped, the detection data of the detection unit 20 can be acquired at a longer interval (sampling cycle Tc2) than during the operation (sampling cycle Tc1). can.

Subsequently, when the ignition switch 44 is turned on by the user in step S2500 of FIG. 5, the power of the data collecting device 30 is turned on in step S3200. On the other hand, in the wireless transmission device 10, the step S2300 is executed every 30 seconds, for example.

In step S3210, the data collection control unit 33 of the data collection device 30 generates a preparation signal instructing each wireless transmission device 10 of the slave units 4 to 7 to prepare for data collection. The data collection control unit 33 repeats the generated preparation signal every predetermined time (for example, 1 second) and continuously transmits the generated preparation signal for a predetermined time (for example, 1 minute). On the other hand, in each of the wireless transmission devices 10 of the slave units 4 to 7, the step S2300 is executed every 30 seconds, for example.

In FIG. 5, even if the preparation signal is transmitted from the data collecting device 30 (step S3210) before the step S1140 is executed, the CPU 12 does not respond because the CPU 12 of the wireless transmitting device 10 is in the sleep mode. While the CPU 12 shifts to the normal mode (step S1140), the CPU 12 waits, and the communication control unit 12b of the data control unit 120 determines whether or not a preparation signal is transmitted from the data collection device 30 (step S1140). In step S1150), when the preparation signal is transmitted from the data collection device 30 (step S3210), in step S1200, the mode control unit 121 of each wireless transmission device 10 of the slave units 4 to 7 causes the CPU 12 to use the data collection device 30. Confirm the restart of and change to the power-on mode.

In step S1210, the communication control unit 12b of the data control unit 120 of each wireless transmission device 10 of the slave units 4 to 7 collects a response signal including a slave unit ID and a non-initial signal indicating that it is not the first time since the power is turned on. Send to 30. In step S3220, the data collection control unit 33 of the data collection device 30 confirms the response signal including the slave unit ID and the non-initial signal transmitted from each wireless transmission device 10 of the slave units 4 to 7. After that, the processing in the data collecting device 30 returns to before step S3030 in FIG. Further, the processing in each wireless transmission device 10 of the slave units 4 to 7 returns to the front of step S1030 in FIG.

In the first embodiment, for example, the slave unit 4 corresponds to an example of the first slave unit, and the detection unit 20 (corrosion sensor 21) of the slave unit 4 corresponds to an example of the first state detection unit, and the slave unit 4 The memory 11 of the slave unit 4 corresponds to an example of the first storage unit, the oscillator 15 of the slave unit 4 corresponds to an example of the first oscillator, and the counter 122 of the slave unit 4 corresponds to an example of the first counter. The data control unit 120 (detection control unit 12a) of the machine 4 corresponds to an example of the first data control unit. Further, for example, the slave unit 5 corresponds to an example of the second slave unit, the detection unit 20 (corrosion sensor 21) of the slave unit 5 corresponds to an example of the second state detection unit, and the memory 11 of the slave unit 5 corresponds to. , Corresponds to an example of the second storage unit, the oscillator 15 of the slave unit 5 corresponds to an example of the second oscillator, the counter 122 of the slave unit 5 corresponds to an example of the second counter, and the data of the slave unit 5 The control unit 120 (detection control unit 12a) corresponds to an example of the second data control unit.

FIG. 6 is a sequence diagram schematically showing an example of a procedure for transmitting detection data from each wireless transmission device 10 of the slave units 4 to 7 to the data collection device 30 (master unit). The operation of FIG. 6 is started when, for example, an instruction to the data collecting device 30 is input by the user.

In step S3300, the data collection control unit 33 of the data collection device 30 transmits a request signal requesting detection data to each wireless transmission device 10 of the slave units 4 to 7. In step S2400, the communication control unit 12b of each wireless transmission device 10 of the slave units 4 to 7 transmits the detection information including the detection data stored in the memory 11 to the data collection device 30 together with the slave unit ID. After that, the processing in each wireless transmission device 10 of the slave units 4 to 7 is completed.

In step S3310, the data collection control unit 33 of the data collection device 30 receives the detection information and the slave unit ID transmitted from each of the wireless transmission devices 10 of the slave units 4 to 7, and receives the received detection information as the slave unit ID. Is stored in the memory 31 in association with.

In step S3320, the data collection control unit 33 of the data collection device 30 corrects the detection data included in the detection information stored in the memory 31. The data correction procedure in step S3320 will be described below with reference to FIG. After that, the processing in the data collecting device 30 ends.

FIG. 7 is a flowchart schematically showing an example of a data correction procedure executed by the data collection device 30 (master unit).

In step S4000, the data collection control unit 33 calculates the number of regular data. The number of regular data is the number of data that should be detected by each of the detection units 20 of the slave units 4 to 7 during the synchronization cycle Tc3. For example, the sampling cycle Tc1 is Tc1 = 10 seconds, the sampling cycle Tc2 is Tc2 = 30 minutes, and the synchronization cycle Tc3 is Tc3 = 24 hours. Further, of the 24 hours, the time in the power-on mode (that is, the time when the detection data is acquired in the sampling cycle Tc1) is 6 hours, and the time in the power-off mode (that is, the time when the detection data is acquired in the sampling cycle Tc2). ) Is 18 hours.

In this case, the number of data that should be detected in power-on mode is
6 x 60 x 60/10 = 2160
Therefore, the number is 2160. Also, the number of data that should be detected in the power off mode is
18 x 60/30 = 36
Therefore, there are 36 pieces. Therefore, the number of regular data is
2160 + 36 = 2196
Will be. The data collection control unit 33 may count the time in the power-on mode and the time in the power-off mode during the synchronization cycle Tc3, and store the counted integrated values in the memory 31.

In step S4010, the data collection control unit 33 acquires the data number count value. The data number count value represents the number of measurement data actually detected by each of the detection units 20 of the slave units 4 to 7 during the synchronization cycle Tc3. As described above, the detection control unit 12a of each wireless transmission device 10 of the slave units 4 to 7 acquires the detection data of the detection unit 20 each time the count value of the counter 122 is counted up. Therefore, in each CPU 12 of the slave units 4 to 7, the count value (data number count value) immediately before the count value of the counter 122 is reset by the synchronization signal from the data collection device 30 is detected by each of the slave units 4 to 7. The number of measurement data actually detected in the unit 20 is represented.

As described above, each of the memories 11 of the slave units 4 to 7 stores the detection information in which the detection data and the count value of the counter 122 when the detection data is acquired are associated with each other. This detection information is transmitted from each wireless transmission device 10 of the slave units 4 to 7 to the data collection device 30 and stored in the memory 31. Therefore, the data collection control unit 33 acquires the count value immediately before the count value of the counter 122 is reset from the memory 31 as the data number count value.

In step S4020, the data collection control unit 33 calculates the difference according to the equation (1).
Difference = number of data Count value-number of regular data (1)
In step S4030, the data collection control unit 33 determines whether or not the calculated difference is zero. If the calculated difference is zero (YES in step S4030), the process proceeds to step S4100. If the calculated difference is not zero (NO in step S4030), the process proceeds to step S4040.

In step S4040, the data collection control unit 33 calculates the division size according to the equation (2).
Divided size = | Difference | +1 (2)
Division position = number of data count value / division size (3)
In step S4050, the data collection control unit 33 calculates the division position according to the equation (3). The division size and division position will be described later with reference to specific examples.

In step S4060, the data collection control unit 33 determines the data to be the target of the operation for correcting the data. The data to be operated is determined to be the data before or after the division position, for example, by rounding the division position. In step S4070, the data collection control unit 33 determines whether or not the data number count value is larger than the normal data number. Since it is NO in step S4030, one of the data number count value and the regular data number is larger than the other. If the data number count value is larger than the regular data number (YES in step S4070), the process proceeds to step S4080. On the other hand, if the data number count value is equal to or less than the regular data number (NO in step S4070), the process proceeds to step S4090.

In step S4080, the data collection control unit 33 deletes the data to be operated. In step S4090, the data collection control unit 33 duplicates the data to be operated and inserts it at the next position. In step S4100, the data collection control unit 33 deletes the synchronization flag. Since the synchronization flag is not required for the data to be stored in the memory 31 of the data collection device 30, the synchronization flag is deleted. After that, the process of FIG. 7 ends.

(First example of data correction)
FIG. 8 is a diagram schematically showing a first example of data correction in a data collecting device. FIG. 9 is a diagram schematically showing a calculation result 200 of each value such as the number of regular data in the example of FIG. A first example of data correction will be described with reference to FIGS. 8 and 9.

The stored information 100 shown in FIG. 8 is generated using the detection information transmitted from each of the wireless transmission devices 10 of the slave units 4 to 7, and is stored in the memory 31 of the data collection device 30. As shown in FIG. 8, the stored information 100 includes a synchronization flag column 101, a count value column 102 before correction, a count value column 103 after correction, a temperature data column 104, a humidity data column 105, and corrosion. Includes data column 106. The data correction operation content column 110 added to the stored information 100 represents the content operated for each data of the temperature data column 104, the humidity data column 105, and the corrosion data column 106 for data correction.

When a synchronization signal is received, the synchronization flag "1" is written in the synchronization flag column 101. "0" is described in advance in the synchronization flag column 101. When each detection control unit 12a of each wireless transmission device 10 of the slave units 4 to 7 receives a synchronization signal from the data collection device 30, the synchronization flag "1" is written in the synchronization flag column 101 (step S1090 in FIG. 3). In the count value column 102 before correction, a count value when transmitted from each wireless transmission device 10 of the slave units 4 to 7 is described. The corrected count value column 103 represents the count value after the data correction is performed. The temperature data column 104, the humidity data column 105, and the corrosion data column 106 each describe the detection data acquired when the count value of the counter 122 is counted up.

In this way, the synchronization flag column 101 of the stored information 100, the count value column 102 before correction, the temperature data column 104, the humidity data column 105, and the corrosion data column 106 are displayed from the wireless transmission devices 10 of the slave units 4 to 7. The data of the transmitted detection information is described respectively.

In the first example of this data correction, as shown in the calculation result 200 of FIG. 9, the number of regular data is “100” and the number of measured data is “102”. Therefore, in the count value column 102 before correction in FIG. 8, the synchronization flag column 101 is set to "1" (that is, the synchronization signal is received), the count value is reset to 0, and then the synchronization flag column 101 is next. Is set to "1" (that is, a synchronization signal is received), and the count value (data number count value) immediately before the count value is reset to 0 is "102". As described above, the number of measured data is equivalent to the data number count value.

Since the detection data is not acquired at the timing when the synchronization flag "1" is written in the synchronization flag column 101 (that is, the synchronization signal is received) and the count value is reset to 0, the temperature data is as shown in FIG. No data is described in column 104, humidity data column 105, and corrosion data column 106. Then, the temperature data Tp1, Tp2, ..., Tp10 are acquired for each count-up of the count value in the count value column 102 before correction. The same applies to humidity data and corrosion data.

In FIG. 9, according to the above equation (1),
Difference = number of measured data-number of regular data = 102-100 = 2
Will be. That is, in order to match the number of measurement data with the number of regular data, it is necessary to reduce the number of measurement data by two. Therefore, the data to be deleted is determined.

The division size is determined by the above formula (2).
Divided size = | Difference | + 1
= 2 + 1 = 3
Will be. Therefore, the number of 102 measurement data is divided into three.

The division position is determined by the above equation (3).
Division position = number of data count value / division size = 102/3 = 34
Will be.

Therefore, as shown in FIG. 9, the first division position 1 is "34" and the second division position 2 is "68". As a result, as for the data of the operation target, the first operation target 1 becomes the 34th data, and the second operation target 2 becomes the 68th data.

Therefore, as shown in FIG. 8, the temperature data, the humidity data, and the corrosion data corresponding to the count value “34” in the count value column 102 before the correction are deleted. Therefore, the count value "35" in the count value column 102 before the correction is corrected to the count value "34" in the count value column 103 after the correction.

Similarly, as shown in FIG. 8, the temperature data, the humidity data, and the corrosion data corresponding to the count value “68” in the count value column 102 before correction are deleted. Therefore, the count value "69" in the count value column 102 before the correction is corrected to the count value "67" in the count value column 103 after the correction.

As a result, the count value "101" in the count value column 102 before correction is corrected to the count value "99" in the count value column 103 after correction, and the count value "102" in the count value column 102 before correction is corrected. , In the corrected count value column 103, the count value is corrected to "100". By such data correction, the number of detected data of the stored information 100 matches the number of regular data "100".

(Second example of data correction)
FIG. 10 is a diagram schematically showing a second example of data correction in a data collecting device. FIG. 11 is a diagram schematically showing a calculation result 200 of each value such as the number of regular data in the example of FIG. A second example of data correction will be described with reference to FIGS. 10 and 11.

In the second example of this data correction, as shown in the calculation result 200 of FIG. 11, the number of regular data is “100” and the number of measured data is “98”. Therefore, in the count value column 102 before correction in FIG. 10, the synchronization flag column 101 is set to "1" (that is, the synchronization signal is received), the count value is reset to 0, and then the synchronization flag column 101 is next. Is set to "1" (that is, a synchronization signal is received), and the count value (data number count value) immediately before the count value is reset to 0 is "98".

In FIG. 11, according to the above equation (1),
Difference = number of measured data-number of regular data = 98-100 = -2
Will be. That is, in order to match the number of measurement data with the number of regular data, it is necessary to increase the number of measurement data by two. Therefore, the data to be duplicated is determined.

The division size is determined by the above formula (2).
Divided size = | Difference | + 1
= 2 + 1 = 3
Will be. Therefore, the number of 98 measurement data is divided into three.

The division position is determined by the above equation (3).
Division position = number of data count value / division size = 98/3 = 32.67
Will be.

Therefore, as shown in FIG. 11, the first division position 1 is “32.67” and the second division position 2 is “65.33”. As a result, as for the data of the operation target, the first operation target 1 becomes the 33rd data by rounding, and the second operation target 2 becomes the 65th data by rounding.

Therefore, as shown in FIG. 10, the temperature data Tp3, the humidity data Hm3, and the corrosion data Cr3 corresponding to the count value “33” in the count value column 102 before correction are duplicated and inserted at the next position. NS. Therefore, the count value "34" in the count value column 102 before the correction is corrected to the count value "35" in the count value column 103 after the correction.

Similarly, as shown in FIG. 10, the temperature data Tp5, the humidity data Hm5, and the corrosion data Cr5 corresponding to the count value “65” in the count value column 102 before correction are duplicated and inserted at the next position. Will be done. Therefore, the count value "66" in the count value column 102 before the correction is corrected to the count value "68" in the count value column 103 after the correction.

As a result, the count value "97" in the count value column 102 before correction is corrected to the count value "99" in the count value column 103 after correction, and the count value "98" in the count value column 102 before correction is corrected. , In the corrected count value column 103, the count value is corrected to "100". By such data correction, the number of detected data of the stored information 100 matches the number of regular data "100".

(Third example of data correction)
FIG. 12 is a diagram schematically showing a third example of data correction in a data collecting device. FIG. 13 is a diagram schematically showing a calculation result 200 of each value such as the number of regular data in the example of FIG. A third example of data correction will be described with reference to FIGS. 12 and 13.

In the third example of this data correction, as shown in the calculation result 200 of FIG. 13, the number of regular data is “100” and the number of measured data is “97”. Therefore, in the count value column 102 before correction in FIG. 12, the synchronization flag column 101 is set to "1" (that is, the synchronization signal is received), the count value is reset to 0, and then the synchronization flag column 101 is next. Is set to "1" (that is, a synchronization signal is received), and the count value (data number count value) immediately before the count value is reset to 0 is "97".

In FIG. 13, according to the above equation (1),
Difference = number of measured data-number of regular data = 97-100 = -3
Will be. That is, in order to match the number of measurement data with the number of regular data, it is necessary to increase the number of measurement data by three. Therefore, the data to be duplicated is determined.

The division size is determined by the above formula (2).
Divided size = | Difference | + 1
= 3 + 1 = 4
Will be. Therefore, the number of measurement data of 97 is divided into four.

The division position is determined by the above equation (3).
Division position = number of data count value / division size = 97/4 = 24.25
Will be.

Therefore, as shown in FIG. 13, the first division position 1 becomes "24.25", the second division position 2 becomes "48.50", and the third division position 3 becomes "48.50". , "72.75". As a result, as for the data of the operation target, the first operation target 1 becomes the 24th data by rounding, the second operation target 2 becomes the 49th data by rounding, and the third operation target 3 Is rounded to the 73rd data.

Therefore, as shown in FIG. 12, the temperature data Tp3, the humidity data Hm3, and the corrosion data Cr3 corresponding to the count value “24” in the count value column 102 before correction are duplicated and inserted at the next position. NS. Therefore, the count value "25" in the count value column 102 before the correction is corrected to the count value "26" in the count value column 103 after the correction.

Similarly, as shown in FIG. 12, the temperature data Tp5, the humidity data Hm5, and the corrosion data Cr5 corresponding to the count value “49” in the count value column 102 before correction are duplicated and inserted at the next position. Will be done. Therefore, the count value "50" in the count value column 102 before the correction is corrected to the count value "52" in the count value column 103 after the correction.

Similarly, as shown in FIG. 12, the temperature data Tp7, the humidity data Hm7, and the corrosion data Cr7 corresponding to the count value “73” in the count value column 102 before correction are duplicated and inserted at the next position. Will be done. Therefore, the count value "74" in the count value column 102 before the correction is corrected to the count value "77" in the count value column 103 after the correction.

As a result, the count value "96" in the count value column 102 before correction is corrected to the count value "99" in the count value column 103 after correction, and the count value "97" in the count value column 102 before correction is corrected. , In the corrected count value column 103, the count value is corrected to "100". By such data correction, the number of detected data of the stored information 100 matches the number of regular data "100".

(Fourth example of data correction)
FIG. 14 is a diagram schematically showing a fourth example of data correction in a data collecting device. FIG. 15 is a diagram schematically showing a calculation result 200 of each value such as the number of regular data in the example of FIG. A fourth example of data correction will be described with reference to FIGS. 14 and 15.

In the fourth example of this data correction, as shown in the calculation result 200 of FIG. 15, the number of regular data is “10” and the number of measured data is “15”. Therefore, in the count value column 102 before correction in FIG. 14, the synchronization flag column 101 is set to "1" (that is, the synchronization signal is received), the count value is reset to 0, and then the synchronization flag column 101 is next. Is set to "1" (that is, a synchronization signal is received), and the count value (data number count value) immediately before the count value is reset to 0 is "15".

In FIG. 15, according to the above equation (1),
Difference = number of measured data-number of regular data = 15-10 = 5
Will be. That is, in order to match the number of measurement data with the number of regular data, it is necessary to reduce the number of measurement data by five. Therefore, the data to be deleted is determined.

The division size is determined by the above formula (2).
Divided size = | Difference | + 1
= 5 + 1 = 6
Will be. Therefore, the number of measurement data of 15 is divided into 6.

The division position is determined by the above equation (3).
Division position = number of data count value / division size = 15/6 = 2.50
Will be.

Therefore, as shown in FIG. 15, the first division position 1 becomes "2.50", the second division position 2 becomes "5.00", and the third division position 3 becomes "5.00". , "7.50", the fourth division position 4 is "10.00", and the fifth division position 5 is "12.50". As a result, as for the data of the operation target, the first operation target 1 becomes the third data by rounding, the second operation target 2 becomes the fifth data by rounding, and the third operation target 3 Is the 8th data by rounding, the 4th operation target 4 is the 10th data by rounding, and the 5th operation target 5 is the 13th data by rounding.

Therefore, as shown in FIG. 14, the temperature data, the humidity data, and the corrosion data corresponding to the count value “3” in the count value column 102 before the correction are deleted. Therefore, the count value "4" in the count value column 102 before the correction is corrected to the count value "3" in the count value column 103 after the correction.

Similarly, as shown in FIG. 14, the temperature data, the humidity data, and the corrosion data corresponding to the count value “5” in the count value column 102 before correction are deleted. Therefore, the count value "6" in the count value column 102 before the correction is corrected to the count value "4" in the count value column 103 after the correction.

Similarly, as shown in FIG. 14, the temperature data, humidity data, and corrosion data corresponding to the count value “8” in the count value column 102 before correction are deleted. Therefore, the count value "9" in the count value column 102 before the correction is corrected to the count value "6" in the count value column 103 after the correction.

Similarly, as shown in FIG. 14, the temperature data, the humidity data, and the corrosion data corresponding to the count value “10” in the count value column 102 before correction are deleted. Therefore, the count value "11" in the count value column 102 before the correction is corrected to the count value "7" in the count value column 103 after the correction.

Similarly, as shown in FIG. 14, the temperature data, the humidity data, and the corrosion data corresponding to the count value “13” in the count value column 102 before correction are deleted. Therefore, the count value "14" in the count value column 102 before the correction is corrected to the count value "9" in the count value column 103 after the correction.

As a result, the count value "15" in the count value column 102 before the correction is corrected to the count value "10" in the count value column 103 after the correction. By such data correction, the number of detected data in the stored information 100 matches the number of regular data "10".

(Fifth example of data correction)
FIG. 16 is a diagram schematically showing a fifth example of data correction in a data collecting device. FIG. 17 is a diagram schematically showing a calculation result 200 of each value such as the number of regular data in the example of FIG. A fifth example of data correction will be described with reference to FIGS. 16 and 17.

In the fifth example of this data correction, as shown in the calculation result 200 of FIG. 17, the number of regular data is “10” and the number of measured data is “5”. Therefore, in the count value column 102 before correction in FIG. 16, the synchronization flag column 101 is set to "1" (that is, the synchronization signal is received), the count value is reset to 0, and then the synchronization flag column 101 is next. Is set to "1" (that is, a synchronization signal is received), and the count value (data number count value) immediately before the count value is reset to 0 is "5".

In FIG. 15, according to the above equation (1),
Difference = number of measured data-number of regular data = 5-10 = -5
Will be. That is, in order to match the number of measurement data with the number of regular data, it is necessary to increase the number of measurement data by five. Therefore, the data to be duplicated is determined.

The division size is determined by the above formula (2).
Divided size = | Difference | + 1
= 5 + 1 = 6
Will be. Therefore, the number of 5 measurement data is divided into 6.

The division position is determined by the above equation (3).
Division position = number of data count value / division size = 5/6 = 0.83
Will be.

Therefore, as shown in FIG. 17, the first division position 1 becomes "0.83", the second division position 2 becomes "1.67", and the third division position 3 becomes "1.67". , "2.50", the fourth division position 4 is "3.33", and the fifth division position 5 is "4.17". As a result, as for the data of the operation target, the first operation target 1 becomes the first data by rounding, the second operation target 2 becomes the second data by rounding, and the third operation target 3 Is rounded to the third data, the fourth operation target 4 is the third data by rounding, and the fifth operation target 5 is the fourth data by rounding.

Therefore, as shown in FIG. 16, the temperature data Tp1, the humidity data Hm1, and the corrosion data Cr1 corresponding to the count value “1” in the count value column 102 before correction are duplicated and inserted at the next position. NS. Therefore, the count value "2" in the count value column 102 before the correction is corrected to the count value "3" in the count value column 103 after the correction.

Similarly, as shown in FIG. 16, the temperature data Tp2, the humidity data Hm2, and the corrosion data Cr2 corresponding to the count value “2” in the count value column 102 before correction are duplicated and inserted at the next position. Will be done. Therefore, the count value "3" in the count value column 102 before the correction is corrected to the count value "5" in the count value column 103 after the correction.

Similarly, as shown in FIG. 16, two temperature data Tp3, humidity data Hm3, and corrosion data Cr3 corresponding to the count value “3” in the count value column 102 before correction are duplicated and are placed at the next position. Is inserted continuously in. Therefore, the count value "4" in the count value column 102 before the correction is corrected to the count value "8" in the count value column 103 after the correction.

Similarly, as shown in FIG. 16, the temperature data Tp4, the humidity data Hm4, and the corrosion data Cr4 corresponding to the count value “4” in the count value column 102 before correction are duplicated and inserted at the next position. Will be done. Therefore, the count value "5" in the count value column 102 before the correction is corrected to the count value "10" in the count value column 103 after the correction. By such data correction, the number of detected data in the stored information 100 matches the number of regular data "10".

(effect)
As described above, in the first embodiment, the data collection control unit 33 of the data collection device 30 calculates the number of measurement data acquired by the slave units 4 to 7, respectively, by the data collection control unit 33. Matches the number of regular data. That is, when the number of measured data is larger than the number of regular data, the detected data is deleted, and when the number of measured data is smaller than the number of regular data, the detected data is duplicated to match the number of measured data with the number of regular data. There is. Thereby, according to the first embodiment, the detection data of the same acquisition timing can be compared between the slave units 4 to 7. As a result, in the vehicle 1, the progress of corrosion can be suitably compared between the locations where the corrosion sensors 21 are attached.

Further, in this first embodiment, the division size is calculated using the difference between the data number count value (measured data number) and the regular data number, the division position is calculated using the division size, and the division position is rounded off. As a result, the data before or after the division position is set as the data to be operated in the data correction. That is, the data is corrected by duplicating or deleting the data at the positions evenly divided excluding the beginning and the end of the detected data. Therefore, it is possible to suppress the gradual change of the detected data continuously acquired in the sampling cycles Tc1 and Tc2 from being hindered by the data correction as much as possible.

Further, in the first embodiment, when the synchronization signal is received, in each of the wireless transmission devices 10 of the slave units 4 to 7, the data control unit 120 (detection control unit 12a) only writes the synchronization flag. The data correction is performed in the data collecting device 30. Therefore, the consumption of the battery 14 of each wireless transmission device 10 of the slave units 4 to 7 can be avoided as much as possible.

Further, in the first embodiment, for example, as shown in FIG. 8, the stored information 100 stored in the memory 31 of the data collecting device 30 is provided with a corrected count value column 103, and the count value is corrected. There is. Therefore, by checking the count value in the corrected count value column 103, it is possible to easily grasp that the number of measured data matches the number of regular data by the data correction. Further, when comparing with the detection data of other slave units, the detection data at the same timing can be easily extracted.

(Second Embodiment)
FIG. 18 is a sequence diagram schematically showing an example of the operation of each of the wireless transmission devices 10 and the data collection device 30 (master unit) of the slave units 4 to 7 in the second embodiment. The operation following FIG. 18 is the same as the operation of the first embodiment shown in FIGS. 4 and 5. Further, the configuration of the vehicle 1 including the transmission / reception device of the second embodiment is the same as that of the first embodiment shown in FIGS. 1 and 2.

In the second embodiment, step S1094 is executed instead of step S1090 (FIG. 3). In step S1094, the detection control unit 12a corrects the detection data in the detection information including the detection data stored in the memory 11. That is, in the first embodiment, the data collection control unit 33 of the data collection device 30 corrects the data, and in the second embodiment, the detection control unit 12a of the wireless transmission device 10 executes the correction.

In the second embodiment, since the detection control unit 12a corrects the detection data each time the synchronization signal is received, it is not necessary to write the synchronization flag as in the first embodiment. The second embodiment is the same as the first embodiment except that the subject that executes the data correction is different. Therefore, according to the second embodiment, the same effect as that of the first embodiment can be obtained.

(Transformed embodiment)
(1) In each of the above embodiments, as shown in FIG. 4, step S2300 and step S2400 are executed separately, but the present invention is not limited to this.

For example, the repetition period of step S2300 and the repetition period of step S2400 may be the same. In this case, step S1180 may be executed between step S1140 and step S1150, or between step S1150 and step S1160. In this embodiment, step S2400 can be omitted.

Alternatively, normally, step S2300 is executed every 30 seconds, and step S1180 is executed between step S1140 and step S1150, or between step S1150 and step S1160 only at the timing of every 30 minutes. You may. In this embodiment as well, step S2400 can be omitted.

(2) In each of the above embodiments, the detection unit 20 is attached to, for example, the engine room, the front wheel house, the outer panel of the lift gate, and the undercover of the engine of the vehicle 1, but is limited to this. do not have. For example, the detection unit 20 may be attached to a place other than the above four places. Further, the detection unit 20 may be attached to three or less places, or may be attached to five or more places. The wireless transmission device 10 may be mounted in the vicinity of the detection unit 20.

(3) In each of the above embodiments, the detection unit 20 includes, but is not limited to, the corrosion sensor 21 and the temperature / humidity sensor 22. The detection unit 20 may include only the corrosion sensor 21, may include only the temperature / humidity sensor 22, and may further include another sensor in addition to the corrosion sensor 21 and the temperature / humidity sensor 22.

(4) In each of the above embodiments, the secondary battery 48 is provided, but the present invention is not limited to this. The secondary battery 48 is in steps S3100, S3110, S3120 after the ignition switch 44 is turned off (step S2200 in FIG. 4) until the power of the data collecting device 30 is turned off (step S3130 in FIG. 4). A battery having a small capacity capable of operating may be used. Alternatively, an electric double layer capacitor may be provided instead of the secondary battery 48.

In the case of such a secondary battery 48 or an electric double layer capacitor, the secondary battery 48 or the electric double layer capacitor 48 or the electric double layer capacitor is charged only when the secondary battery 48 or the electric double layer capacitor is charged (that is, the ignition switch 44 is turned on). The electric double layer capacitor may be configured to supply power to the data acquisition device 30.

(5) In each of the above embodiments, the secondary battery 48 powers the data collecting device 30 from the secondary battery 48 only when the secondary battery 48 is charged (that is, the ignition switch 44 is turned on). May be configured to be supplied.

In such a configuration, for example, when the ignition switch 44 is turned on, the power of the data collecting device 30 may be automatically turned on.

Further, for example, when the data collection control unit 33 determines that the ignition switch 44 has been turned off based on the output signal from the ECU 50 and the processing of steps S3100 and S3120 (FIG. 4) is normally completed, the data collection device 30 It may be configured to be powered off automatically. Alternatively, when the user instructs the data collection device 30 to end the data collection program during the operation of the data collection program stored in the memory 31, the power of the data collection device 30 is turned off. It may be configured as follows. In place of or in addition to these configurations, the data collection device 30 may be configured to be powered off when the power switch provided in the data collection device 30 is turned off by the user.

(6) In each of the above embodiments, for example, as shown in FIG. 8, a corrected count value column 103 is provided, and the corrected count value after data correction is clearly indicated, but the corrected count value column is specified. It is not necessary to provide 103. Alternatively, the count value before correction may be described as it is in the count value column 103 after correction. In this case, for example, in FIG. 8, since the 34th and 68th data are deleted, the count values "34" and "68" are missing numbers. Further, for example, in FIG. 10, since the 33rd and 65th data are duplicated, the count values "33" and "65" are shown in duplicate.

(7) In each of the above embodiments, the synchronization flag is deleted in step S4100 (FIG. 7). In this case, the data collection control unit 33 may delete the entire line in which "1" is written in the synchronization flag column 101 in the stored information 100 shown in FIG. 8, for example. Alternatively or additionally, the data collection control unit 33 may delete the synchronization flag column 101 (for example, FIG. 8) for which the data correction is completed. Alternatively, the data collection control unit 33 may delete the entire synchronization flag column 101 after all the data corrections included in the stored information 100 are completed.

(8) In each of the above embodiments, for example, as shown in FIGS. 8 and 14, the corrected count value column 103 and the data columns 104, 105, 106 of the deleted row are shown as blanks, and the data is displayed. It is made to know that it has been deleted. However, the line deleted by the data collection control unit 33 may not be included in the stored information 100.

(9) In each of the above embodiments, for example, the stored information 100 shown in FIG. 8 may include information on sampling cycles Tc1 and Tc2 in which the count value of the counter 122 is counted up. In this case, the data collection control unit 33 can easily calculate the number of regular data from the information included in the stored information 100.

(10) In each of the above embodiments, when the number of measured data is smaller than the number of regular data, the detected data is duplicated, but the present invention is not limited to this. For example, instead of rounding off the calculated division position, the average value of the detection data before and after the division position may be used as new detection data.

1 Vehicle 4, 5, 6, 7 Slave unit 10 Wireless transmitter 11, 31 Memory 12a Detection control unit 12b, 33 Communication control unit 120 Data control unit 121 Mode control unit 13, 40 Antenna unit 14 Battery 20 Detection unit 21 Corrosion sensor 22 Temperature / humidity sensor 30 Data collection device 42 In-vehicle battery 44 Ignition switch 46 Cigar lighter socket 48 Secondary battery

Claims (8)

A transmission / reception device including a master unit and a first slave unit and a second slave unit configured to be able to communicate with the master unit, respectively.
The first slave unit is
A first state detection unit that outputs first state data indicating the state of the first mounting location, and
1st memory and
The first oscillator that outputs the clock signal and
A first counter whose count value is counted up in the first sampling cycle generated by using the clock signal output from the first oscillator, and
The first state data is acquired for each count-up of the first count value, which is the count value of the first counter, and is stored in the first storage unit in association with the counted-up first count value. 1 Data control unit and
The second handset is
A second state detection unit that outputs second state data representing the state of the second mounting place different from the first mounting place, and
Second memory and
The second oscillator that outputs the clock signal and
A second counter whose count value is counted up in the second sampling cycle generated by using the clock signal output from the second oscillator, and
The second state data is acquired for each count-up of the second count value, which is the count value of the second counter, and is stored in the second storage unit in association with the counted-up second count value. 2 Data control unit and
The master unit simultaneously transmits the first count value and the synchronization signal for resetting the second count value to the first slave unit and the second slave unit in a predetermined synchronization cycle. Including the collection control unit
When the first slave unit receives the synchronization signal, the first data control unit resets the first count value.
When the second slave unit receives the synchronization signal, the second data control unit resets the second count value.
Transmitter / receiver. The data collection control unit transmits a data request signal requesting the transmission of the first state data to the first slave unit, and then transmits the data request signal.
The first data control unit
When the synchronization signal is received, a synchronization flag indicating the reception timing of the synchronization signal is stored in the first storage unit in association with the first state data stored in the first storage unit.
Upon receiving the data request signal, the synchronization flag, all the first state data, and the first count value stored in the first storage unit are transmitted to the master unit.
The data collection control unit
Based on the synchronization flag, the data number count value, which is the first count value immediately before the reset, is specified.
When the number of regular data, which is the number of data of the first state data that should be stored in the first sampling cycle, is different from the data number count value during the synchronization cycle, the first state data is corrected. Then, the number of data of the first state data is matched with the number of regular data.
The transmitter / receiver according to claim 1. The first data control unit
The number of regular data, which is the number of data of the first state data that should be stored in the first sampling cycle during the synchronization cycle, and the number of data count value, which is the first count value immediately before reset, are different. When, the first state data is corrected so that the number of data of the first state data matches the number of regular data.
The transmitter / receiver according to claim 1. The difference between the number of regular data and the count value of the number of data is calculated.
The division size is calculated by adding 1 to the absolute value of the difference.
The division position is calculated by dividing the data number count value by the division size.
The first state data to be corrected is determined based on the multiple of the division position.
The transmitter / receiver according to claim 2 or 3. The data collection control unit generates a stop notification signal for notifying that the operating master unit stops its operation.
The master unit stops its operation after the stop notification signal is transmitted to the first slave unit.
The first data control unit sets the first sampling cycle to the sampling cycle Tc1 before the stop notification signal is transmitted from the master unit, and after the stop notification signal is transmitted from the master unit. , The first sampling cycle is set to a sampling cycle Tc2 longer than the sampling cycle Tc1.
The transmitter / receiver according to any one of claims 1 to 4. The data collection control unit generates a restart notification signal for notifying that the master unit has resumed operation after the operation is stopped.
When the master unit resumes operation after the operation is stopped, the master unit transmits the restart notification signal to the first slave unit.
When the stop notification signal is transmitted from the master unit, the first data control unit shifts to a sleep mode in which the first data control unit does not operate, and the first data control unit shifts from the sleep mode to the first data control unit at predetermined time intervals. Temporarily shifts to the normal mode in which the unit operates, and determines whether or not the restart notification signal is transmitted from the master unit.
The transmitter / receiver according to claim 5. The first state detection unit and the second state detection unit each include a corrosion sensor that outputs a current value according to the degree of corrosion of the mounting location as the state data.
The transmitter / receiver according to claim 5 or 6. A vehicle including the transmission / reception device according to any one of claims 1 to 7.
The vehicle
In-vehicle battery and
The ignition switch that starts the operation of the vehicle and
A cigarette lighter socket in which power is supplied from the vehicle-mounted battery when the ignition switch is turned on, and power supply from the vehicle-mounted battery is stopped when the ignition switch is turned off.
With more
The master unit is connected to the cigarette lighter socket.
vehicle.

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