JP2021063770A - Device and method for measuring moving distance and program - Google Patents

Abstract

To provide a device and a method for measuring a moving distance and a program that can obtain a more proper moving distance easily.SOLUTION: A moving distance measuring device includes: a measurement unit for measuring a physical amount related to a moving amount; and a control unit for performing first addition processing of adding a positional difference value of a results of last twice positioning to an accumulated value of the moving distance of an own vehicle, calculating the moving amount on the basis of a result of measurement by the measuring unit in a period of time determined according to a predetermined condition, and performing second addition processing of adding the calculated moving amount to the accumulated value instead of performing the first addition processing. The control unit does not perform the first addition processing related to the difference value including the moving distance in the predetermined period of time.SELECTED DRAWING: Figure 3

Description

The present invention relates to a moving distance measuring device, a moving distance measuring method and a program.

There is a movement distance measuring device that can acquire the movement status of a user in real time by satellite positioning that acquires the current position by using a satellite positioning system such as GPS (Global Positioning System). In particular, in measurement for activities such as jogging and walking, the current position and moving distance can be displayed in real time to inform the user of the progress of the activity.

However, satellite positioning cannot be performed in areas where radio waves from a sufficient number of positioning satellites cannot be received accurately, such as under an elevated structure, a tunnel, or a valley of a high-rise building. On the other hand, there is known a technique for measuring a relative movement amount using an acceleration sensor, a geomagnetic field sensor, or the like. In this case, if the relative movement amounts are simply integrated, the measurement error, particularly not only the movement distance but also the direction error, tends to accumulate and expand, and the deviation from the accurate position tends to increase. Therefore, there is a technique for specifying the current position by selecting more accurate information in combination with satellite positioning (Patent Document 1).

Japanese Unexamined Patent Publication No. 2004-233186

However, when counting the integrated movement amount by using a plurality of types of movement amount measurement values in combination, the movement distance obtained must be properly managed and added according to the acquisition characteristics of the movement distance to be used. There is a problem that it becomes strange.

An object of the present invention is to provide a moving distance measuring device, a moving distance measuring method, and a program capable of easily obtaining an appropriate moving distance.

In order to achieve the above object, the present invention
A measurement unit that measures physical quantities related to the amount of movement,
The first addition process of adding the difference value between the positions of the results of the last two positionings to the cumulative value of the movement distance of the own machine is performed, and during the period determined based on the predetermined conditions, the first addition process is performed. Instead, a control unit that performs a second addition process that calculates the movement amount based on the measurement result of the measurement unit and adds it to the cumulative value.
With
The control unit is a movement distance measuring device characterized in that the first addition process relating to the difference value including the movement distance within the period is not performed.

According to the present invention, there is an effect that a more appropriate moving distance can be easily obtained.

It is a front view of an electronic clock. It is a block diagram which shows the functional structure of an electronic clock. It is a figure which shows the example of switching of acquisition of the movement distance in the 1st addition process and acquisition of the movement amount in the 2nd addition process. It is a sequence diagram which shows the exchange and processing of data between a CPU and a satellite radio wave reception processing unit. It is a figure which shows the display example of the movement distance on the display screen of an electronic clock. It is a flowchart which shows the control procedure of the movement distance calculation process. It is a flowchart which shows the modification of the movement distance calculation processing.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a front view of the electronic clock 1 which is the moving distance measuring device of the present embodiment.
The electronic clock 1 is an electronic wristwatch including a main body 10 and a band 20. The band 20 is for attaching the main body 10 to the user's arm or the like. The main body 10 includes a display screen 11, a push button switch 12, and the like.

The display screen 11 performs a digital display. The digital display is, for example, a dot matrix type liquid crystal display or the like. Although one pushbutton switch 12 is shown on the side surface side with respect to the display screen 11, there may be a plurality of pushbutton switches 12 or one located in the same plane as the display screen 11. ..

FIG. 2 is a block diagram showing a functional configuration of the electronic clock 1.
The electronic clock 1 includes a CPU 41 (Central Processing Unit) (second control unit), a RAM 42 (Random Access Memory) (storage unit), a display unit 43, an operation reception unit 44, a measurement unit 45, and an oscillation circuit 46. A frequency dividing circuit 47, a time measuring circuit 48, a communication unit 49, a satellite radio wave reception processing unit 50, a memory 60, and the like are provided.

The CPU 41 is a processor that performs various operations to perform integrated control of the operation of the electronic clock 1. The CPU 41 executes the movement distance calculation process described later.

The RAM 42 provides the CPU 41 with a working memory space and stores temporary data. The RAM 42 stores the accumulated movement distance (cumulative value 421) within the measurement period.

The display unit 43 has the above-mentioned display screen 11, and causes the display screen 11 to perform digital display under the control of the CPU 41. The displayed contents include the current date and time (time). Further, the CPU 41 may cause the display unit 43 to display the travel distance, the elapsed time related to the stopwatch function, and the like in addition to or temporarily instead of displaying the current time (date and time). Further, the display of the current date and time may be temporarily excluded from the display of a part or all of the display other than the hour and minute.

The operation receiving unit 44 has the above-mentioned push button switch 12, detects an input operation from the outside, and outputs the input signal to the CPU 41. The configuration for accepting an input operation is not limited to the push button switch 12. For example, the operation reception unit 44 may have a touch panel located so as to overlap the display screen 11, or may have a crown.

The measuring unit 45 has a sensor that measures a physical quantity related to the motion (movement amount) of the electronic clock 1 (own machine). The sensor is one in which the CPU 41 can calculate a moving distance, particularly a walking / running distance by walking, based on the measurement data, or a combination thereof, and examples thereof include an acceleration sensor and a geomagnetic field sensor.

The oscillation circuit 46 generates and outputs a predetermined frequency signal (clock signal). The oscillation circuit 46 has, for example, a crystal oscillator here. In the frequency dividing circuit 47, a clock signal is input from the oscillation circuit 46, converted (divided) into a required desired frequency signal, and output to the CPU 41 and the timekeeping circuit 48. The frequency to be converted and output may be a plurality of frequencies, and the setting of the output frequency may be changed by the control of the CPU 41 or the like.

The timekeeping circuit 48 counts the signal input from the frequency dividing circuit 47, counts the current date and time (time and date), and outputs the signal to the CPU 41. The CPU 41 may count the date and time with high accuracy, and the timekeeping circuit 48 may be an RTC (Real Time Clock) or the like.

The satellite radio wave reception processing unit 50 is a module that receives radio waves transmitted from a positioning satellite, performs calculations, and calculates the current position (performs processing related to positioning). The satellite radio wave reception processing unit 50 includes a reception unit 51, a control unit 52 (first control unit), and the like. The receiving unit 51 can capture the transmitted radio wave from the positioning satellite received via the antenna (not shown) and continue (track) the reception. The control unit 52 controls the operation of the reception unit 51 to acquire a required number of signals from the positioning satellites, and calculates the current position and the date and time by performing a predetermined calculation. The control unit 52 can exchange signals with and from the CPU 41, controls the operating state based on the instructions of the CPU 41, and outputs the calculated current position and date and time. Further, the control unit 52 calculates the moving distance based on the measured change amount of the current position (difference value of the position specified by the last two positionings). The movement distance is held as an integrated value 521 by adding a value (difference value) after the timing of initialization (reset) in response to a reset (initialization) instruction from the CPU 41. Further, the integrated value 521 is output to the CPU 41 each time the latest travel distance is added.
The CPU 41 and the control unit 52 form a control unit in the movement distance measuring device of the present embodiment.

The memory 60 has a non-volatile memory such as a flash memory, and stores and holds the program 62, setting data, and measurement data 61. The program 62 includes a program related to the movement distance calculation process described later. The measurement data 61 includes a history of stored positioning results and the like. The plurality of current position data obtained by continuous positioning do not have to be all stored in memory, and include at least the characteristic points of the change when the start and stop timings and the traveling direction change, and other than these. May be appropriately thinned out and retained. The memory 60 can be accessed by both the control unit 52 and the CPU 41 of the satellite radio wave reception processing unit 50, but the power consumption required for reading and writing is high as compared with other operations of each unit in the electronic clock 1. In particular, frequent access from the CPU 41 may not be performed.

Next, the movement distance calculation operation in the electronic clock 1 will be described.
In the electronic clock 1, the satellite radio wave reception processing unit 50 performs positioning at predetermined time intervals to obtain a moving distance (difference value) between the predetermined time intervals. Since it takes some time to convert the difference between the latitude and longitude values into a plane distance and calculate the distance, the load on the CPU 41 can be calculated by the satellite radio wave reception processing unit 50 having high computing power according to the positioning process. The rise can be suppressed. On the other hand, the movement distance within a predetermined time can be calculated (movement measurement) based on the measurement data of the measurement unit 45. Further, here, for example, by calculating and adding the movement distance every second, the total movement distance along the movement route can be obtained.

Here, the data of the integrated value 521, which is the travel distance calculated by the satellite radio wave reception processing unit 50, is output to the CPU 41, and the CPU 41 further integrates the acquired integrated value and the cumulative travel distance (cumulative value 421). ) Is calculated. The reception of the data transmitted from the satellite radio wave reception processing unit 50 by the CPU 41 can often be omitted depending on the processing load of the CPU 41. Therefore, when the CPU 41 receives the travel distance (integrated value) and adds it to the cumulative travel distance (cumulative value) of the electronic clock 1 (own machine), the satellite radio wave reception processing unit 50 initializes the integrated value 521 as reception confirmation. The command is output, and the satellite radio wave reception processing unit 50 initializes the integrated value 521 held in response to the initialization command to zero. If the CPU 41 does not receive the data of the integrated value 521 and the initialization command is not acquired, the satellite radio wave reception processing unit 50 sets the next acquired travel distance to the value of the uninitialized integrated value 521. Add and hold. After that, the data of the integrated value 521 is output to the CPU 41, so that the CPU 41 acquires the total travel distance including the previous travel distance that was not acquired.

The satellite radio wave reception processing unit 50 can perform positioning if it can receive radio waves from a predetermined number (usually four) of positioning satellites, but the situation where a wide area of the sky is blocked (in a tunnel, under an elevated building). In buildings, underground and valleys of skyscrapers, etc., it becomes difficult to perform positioning with normal accuracy (not only when the current position cannot be completely determined, but also the accuracy of the obtained position is the specified minimum. Including cases lower than the standard). In this case, the moving distance is not calculated, and the data of the integrated value 521 is not output to the CPU 41. After that, when the situation returns to the state where positioning is possible with normal accuracy, the satellite radio wave reception processing unit 50 determines the difference between the current position obtained by the first positioning after the return and the position when the previous positioning was successful, that is, a straight line. The distance will be obtained. If the time during which positioning was not possible is short, it is unlikely that a large difference will occur between the obtained difference value and the actual travel distance (distance along the travel route), but positioning is possible. The longer the time that cannot be done, the more likely it is that the effects of changes in the direction of movement (curves, bends, folds, etc.) during that time cannot be ignored. Further, when the total movement distance is displayed on the display screen 11 in real time, the user cannot know the movement distance while positioning is not possible.

On the other hand, the measurement of the moving distance (moving measurement) based on the measurement result of the measuring unit 45 is continued as long as the electronic clock 1 is held by the user. Here, for example, the number of moving steps is specified according to the acceleration change pattern measured by the acceleration sensor, and the moving distance is calculated by multiplying the number of moving steps by the set value of the stride per step (predetermined stride). To do. The stride length may be calibrated by comparing the moving distance obtained by the satellite radio wave reception processing unit 50 with the moving distance based on the measurement result of the measuring unit 45, for example, the initial value is defined by the height or the like. In this measurement, even if there is a change in the moving direction, the measurement of the moving distance is not affected. However, since the stride length can change depending on the user's condition, the road surface condition, and the like, an error is likely to occur according to this change.

In the electronic clock 1 of the present embodiment, the cumulative value of the travel distance is calculated by preferentially using the travel distance (integrated value 521) obtained from the satellite radio wave reception processing unit 50 (first addition processing), and a predetermined upper limit is obtained. If the integrated value 521 is not acquired from the satellite radio wave reception processing unit 50 within the standby time (upper limit time), until an appropriate integrated value 521 can be acquired again (based on the predetermined conditions related to the positioning state). During the period of (), the movement amount is calculated based on the measurement result of the measurement unit 45, and the process of adding to the cumulative value 421 (second addition process) is performed instead of the first addition process.

FIG. 3 is a diagram showing an example of switching between acquisition of the movement distance in the first addition process and acquisition of the movement amount in the second addition process.
In the period i1 that is continuously successful (displayed as ◯) at the interval dt (predetermined time interval) in FIG. 3A, the distance between the positions by the satellite positioning is acquired by the CPU 41 as the moving distance. Further, each time the moving distance is acquired, the moving distance held by the satellite radio wave reception processing unit 50 is initialized. Even if satellite positioning fails or is not received normally by the CPU 41 (x display. Since the moving distance (integrated value 521) cannot be obtained at this timing, the first addition process is not selectively executed), the number of times is 2. If satellite positioning is successful within the number of times, that is, within an interval of 3 dt (here, 3 times the interval dt (an integer multiple of 2 or more)) from the previous successful positioning (period i2), it was obtained by the previous positioning. The linear distance from the position is acquired and added to the cumulative value 421. However, if satellite positioning is not successful during the interval of 3 dt, a time lag may occur from the positioning to the acquisition of the data of the integrated value 521 by the CPU 41 as described above. At the timing t1 when the processing time of the reception processing unit 50 and the additional time α which is the sum of the CPU 41 input timeout time of the output data have elapsed), the positioning timing (depending on the upper limit time) of the interval 3 dt by the movement measurement Change the setting so that the amount of movement after (timing of positioning) is acquired. Then, in the period i4 after the timing t1, the result of the movement measurement is acquired for each interval dt.

Since the measurement unit 45 is also used for determining the movement status (stop, direction change, etc.), it is continuously performed regardless of the success or failure of satellite positioning. In FIG. 3A, it was explained that the movement distance of the period i3 is not added to the cumulative value 421, but the number of movement steps is continuously counted, and the movement distance of the period i3 from the positioning timing of the most recently acquired positioning result is The movement distance is calculated according to the number of movement steps, and may be added to the cumulative value 421 at the timing t1.

As shown in FIG. 3B, while the satellite positioning failure continues (period i5), the movement distance obtained by the movement measurement is continuously added to the cumulative value 421. At the timing t2 when the satellite positioning is successful again, the linear distance between the period Ndt from the position at the time of the previous successful positioning is calculated and output to the CPU 41. Therefore, at the first timing when the acquisition of the travel distance (integrated value 521) data based on satellite positioning is resumed, this acquired straight line is used to avoid duplication with the travel distance due to the travel measurement already added to the cumulative value 421. The distance (difference value (integrated value) including the movement distance during the period in which the movement amount by the movement measurement was added) is discarded without being added to the cumulative value 421. Even in this case, the moving distance held by the satellite radio wave reception processing unit 50 is initialized according to the acquisition of the moving distance. As the moving distance of the period i6 up to the timing t2, the value obtained by the moving measurement may be continuously acquired.

If satellite positioning is successful twice in a row (timing t3), the integrated value 521 will also be the value between the two positionings. Therefore, after the restart, the CPU 41 will acquire the integrated value 521 from the second time onward after the timing t3. Then (the movement period is period i7. That is, the period in which the movement amount by movement measurement is added is up to timing t2 (including timing t2)), the setting is returned to the setting in which this integrated value 521 is added to the cumulative value 421. (Switched), the addition to the cumulative value 421 of the movement distance obtained by the movement measurement is stopped. That is, during the period from timing t1 to timing t2 (a period determined based on a predetermined condition), the second addition process is executed instead of the first addition process.

Although not particularly limited, when the interval for calculating the movement amount based on the movement measurement is synchronized with the calculation of the movement distance based on the positioning result and an integral multiple (usually 1 time) of the update cycle (interval dt) of the integrated value 521. Good. The transition of the addition target to the cumulative value 421 is smoothly performed, and no unnecessary blank is generated.

FIG. 4 is a sequence diagram showing data exchange and processing between the CPU 41 and the satellite radio wave reception processing unit 50 (control unit 52).
When a request for starting continuous acquisition of movement information is sent from the CPU 41 to the satellite radio wave reception processing unit 50, the satellite radio wave reception processing unit 50 starts positioning at a predetermined time interval dt. At this time, the integrated value 521 is initialized.

If the positioning is successful two or more times in a row, the satellite radio wave reception processing unit 50 calculates the moving distance and adds it to the integrated value 521. The satellite radio wave reception processing unit 50 (control unit 52) appropriately adds status data to the data of the integrated value 521 and outputs the data to the CPU 41. The status data may include determination information such as determination of whether or not the user has moved and whether or not the direction of travel has been changed.

When the CPU 41 acquires the data of the integrated value 521, it adds it to the cumulative value 421. Further, the CPU 41 uses the status data to determine whether or not the current position is saved. In addition, the counting value for counting the interval at which the CPU 41 has acquired the data of the integrated value 521 is initialized. The CPU 41 outputs a request for initializing the integrated value to the satellite radio wave reception processing unit 50, and outputs a save signal when it is necessary to save the current position. The satellite radio wave reception processing unit 50 initializes the integrated value 521 in response to the input initialization command of the integrated value and returns it to zero.

If it is determined that the user is not walking (running) based on the measurement result of the measurement unit 45, the CPU 41 adds the movement distance acquired from the satellite radio wave reception processing unit 50 to the cumulative value 421. You may not do it. Due to the movement of the positioning satellite or the like, the current position required within the range of positioning accuracy may change according to the passage of time even if the user does not move. By combining with the measurement result of the measurement unit 45, it is possible not to add the movement distance due to the position change without the actual movement to the cumulative value 421, and thereby the calculation accuracy of the cumulative value 421 can be improved. Further, the CPU 41 outputs the determination result of the presence / absence of walking (running) to the satellite radio wave reception processing unit 50, and calculates the moving distance according to the position change caused by the accuracy of positioning or the like while not walking, as an integrated value 521. It can be decided not to add to.

If the satellite radio wave reception processing unit 50 fails in positioning, the satellite radio wave reception processing unit 50 does not transmit the integrated value data to the CPU 41. The CPU 41 continues counting the positioning result acquisition interval, and when this value reaches a predetermined upper limit value (value corresponding to the upper limit waiting time), the CPU 41 calculates the movement amount by the movement measurement and reaches the cumulative value 421. Switch the setting to addition.

If the satellite radio wave reception processing unit 50 succeeds in positioning again during the calculation of the movement amount by the movement measurement, the satellite radio wave reception processing unit 50 calculates the movement distance in the same manner as above, adds it to the integrated value 521, and then causes the CPU 41. It is output. Even if the CPU 41 acquires the data of the integrated value 521, it discards this value without adding it to the cumulative value 421 once, and continues to calculate the movement amount by the movement measurement and add it to the cumulative value. The CPU 41 outputs an initialization command for the integrated value and a storage signal as needed, and causes the satellite radio wave reception processing unit 50 to initialize the integrated value 521. If the positioning is successful (or within 3 dt of the interval), the setting is changed so that the travel distance based on satellite positioning is added to the cumulative value 421.

FIG. 5 is a diagram showing a display example of the moving distance on the display screen 11 of the electronic clock 1.
As shown in FIG. 5A, for example, on the display screen 11, the cumulative movement distance (value of the cumulative value), the elapsed time, and the current time are displayed in order from the upper row to the lower row. In addition, the cumulative value obtained by the movement measurement after failing to acquire the movement distance by satellite positioning (updated value within the period. The cumulative value obtained by adding the movement amount obtained by the movement measurement until the end of the period is displayed. When displaying (including the update to), as shown in FIG. 5 (b), a sign M indicating that fact may also be indicated so that the user can know it.

FIG. 6 is a flowchart showing a control procedure by the CPU 41 of the moving distance calculation process (including the moving distance measuring method of the present embodiment) executed by the electronic clock 1. This movement distance calculation process is started when, for example, a movement distance measurement command is acquired by an input operation to the operation reception unit 44 by a user or the like.

When the movement distance calculation process is started, the CPU 41 requests the satellite radio wave reception processing unit 50 (control unit 52) to continuously acquire the movement distance (step S101; output request step, output request means). Specifically, the CPU 41 performs positioning by the satellite radio wave reception processing unit 50 at a predetermined time interval (1 second interval), and when the position is specified with a predetermined reference accuracy or higher, the difference from the previous specific position. It is requested that the value be added to the integrated value 521 and transmitted to the CPU 41. At this time, the CPU 41 also initializes the cumulative value 421 to zero, and sets the setting (acquisition setting) related to the priority acquisition of the moving distance in the satellite positioning. Further, the CPU 41 starts counting the standby time (or causes an external timer to start counting).

The CPU 41 determines whether or not the movement distance measurement end command has been acquired (step S102). If it is determined that the distance has been acquired (“YES” in step S102), the CPU 41 outputs a request to the satellite radio wave reception processing unit 50 (control unit 52) to end the acquisition of the travel distance (step S131). , Ends the movement distance calculation process.

When it is determined that the movement distance measurement end command has not been acquired (“NO” in step S102), the CPU 41 acquires (inputs) the travel distance, that is, the data of the integrated value 521 from the satellite radio wave reception processing unit. ) Is determined (step S103). If it is determined that the acquisition has been made (“YES” in step S103), the CPU 41 determines whether or not the acquisition setting is satellite positioning (step S104). When it is determined that the satellite positioning is performed (“YES” in step S104), the CPU 41 adds the acquired integrated value value to the cumulative value 421 (step S105; first addition step, first addition means). ). The CPU 41 outputs a control signal to the display unit 43, and displays the cumulative value 421 on the display unit 43 (step S106). The CPU 41 outputs a command for initializing the integrated value 521 to the satellite radio wave reception processing unit 50 (step S107; initialization command step, initialization command means). Then, the process of the CPU 41 returns to step S102.

If it is determined in the determination process of step S103 that the movement distance has not been acquired (“NO” in step S103), the CPU 41 determines whether or not the acquisition setting is satellite positioning (step S121). .. If it is determined that the satellite positioning is performed (“YES” in step S121), the CPU 41 determines whether or not the counting standby time has elapsed the upper limit standby time (step S122). Here, it takes time to capture the radio waves from the positioning satellite and two receptions before outputting the movement distance continuation acquisition request to the satellite radio wave reception processing unit 50 and acquiring the first movement distance. The first upper limit waiting time may be set to a longer time (for example, 15 seconds) than the second and subsequent upper limit waiting times. If it is determined that the upper limit waiting time has not elapsed (“NO” in step S122), the processing of the CPU 41 returns to step S102.

When it is determined that the waiting time has elapsed (exceeded) the upper limit waiting time (“YES” in step S122), the CPU 41 switches the acquisition setting to the movement measurement by the measuring unit 45 (step S123). Then, the process of the CPU 41 proceeds to step S124. If it is determined in the determination process of step S121 that the acquisition setting is not satellite positioning (“NO” in step S121), the process of the CPU 41 shifts to step S124.

When the process proceeds to step S124, the CPU 41 determines whether or not a unit time (here, 1 second) has elapsed (step S124). This unit time may be determined according to the clock signal at the unit time interval (1 second interval). If it is determined that the unit time has not elapsed (“NO” in step S124), the processing of the CPU 41 returns to step S102.

When it is determined that the unit time has elapsed (“YES” in step S124), the CPU 41 acquires the measurement data for the unit time from the measurement unit 45 and calculates the movement amount (step S125). The measurement data itself may be acquired in real time, not limited to the timing of the unit time, and the processing for calculating the latest movement amount of the unit time may be performed at the timing when the unit time has elapsed. The CPU 41 adds the calculated movement amount to the cumulative value 421 (step S126, the above steps S125 and S126 are collectively the second addition step, the second addition means). The CPU 41 outputs a control signal to the display unit 43 and displays the updated cumulative value on the display screen 11 (step S127). At this time, the CPU 41 indicates that the cumulative value is being calculated by the movement measurement together with the display screen (or the cumulative value is not being calculated based on the positioning result. That is, the cumulative value is currently calculated by any of them. (It is possible to determine whether or not it is) may be displayed. Then, the process of the CPU 41 returns to step S102.

If it is determined in the determination process of step S104 that the acquisition setting is not satellite positioning (“NO” in step S104), the CPU 41 switches the acquisition setting to satellite positioning (step S111; switching step, switching means). .. The CPU 41 outputs an instruction to initialize the integrated value 521 to the satellite radio wave reception processing unit 50 (control unit 52) (step S112). At this time, the CPU 41 does not add the value of the integrated value obtained as described above to the cumulative value 421. Then, the process of the CPU 41 proceeds to step S124. Since the passage of the unit time is the same for satellite positioning and mobile measurement, it is from the satellite radio wave reception processing unit 50 that the process of step S112 shifts to the discrimination process of step S124 and branches to "NO". This is a case where the acquisition of the output moving distance by the CPU 41 is delayed due to an overload of the processing of the CPU 41 or the like. In this case, the travel distance in the latest unit time included in the acquired integrated value has already been added to the cumulative value.

FIG. 7 is a flowchart showing a modified example of the movement distance calculation process.
In the movement distance calculation process of this modification, the process of step S126 in the movement distance calculation process of the above embodiment is replaced with the process of step S126a, and the processes of steps S128 and S129 are added. In addition, the order of processing has been partially changed. The same code will be used for the same processing content, and detailed description thereof will be omitted.

When the process branches to "NO" in the determination process of step S104, the process of the CPU 41 shifts to step S124.

If it is determined in the process of step S124 that the unit time has not elapsed (“NO” in step S124), the process of the CPU 41 proceeds to step S128.

When the process of step S124 branches to "YES" and the movement amount is calculated based on the measurement result of the measurement unit 45 (step S125), the CPU 41 adds the movement amount to the cumulative value 421, and the acquisition setting is set. The integrated value of the movement amount after switching to the movement measurement, that is, the total of the movement amount added to the cumulative value 421 is counted (step S126a). After executing the process of step S127, the CPU 41 shifts the process to step S128.

When the process of steps S124 and S127 shifts to the process of step S128, the CPU 41 determines whether or not the movement distance has been acquired based on satellite positioning (branched to “YES”) in the latest determination process of step S103. (Step S128). If it is determined that there was no acquisition (“NO” in step S128), the processing of the CPU 41 returns to step S102.

When it is determined that the travel distance has been acquired based on the satellite positioning (“YES” in step S128), the CPU 41 determines the travel distance obtained based on the satellite positioning (integration from the satellite radio wave reception processing unit 50). The integrated value 521) first acquired after the transmission of the value 521 is resumed and the integrated value of the movement amount calculated in step S126a (the total of the movement amounts added to the cumulative value 421 within the specified period) are combined. It is stored in the RAM 42 in association with each other (step S129). The stored data may be further associated with time (date and time) information during the period in which the satellite positioning result was not acquired and stored. Then, the process of the CPU 41 shifts to step S111. After the processes of steps S111 and S112 are performed, the process of the CPU 41 returns to step S102.

The data held in parallel in this way may be able to be compared and referenced by the user after being output to an external device (for example, a smartphone) via the communication unit 49. When the CPU 41 cannot continuously acquire the integrated value data even though the satellite positioning is successful, or when the user's movement direction is linear and the linear distance between two distant points is the actual travel distance. If it is almost equal to, the cumulative value is obtained by subtracting the total value of the movement amount by movement measurement from the obtained cumulative value (total movement distance) and adding the movement distance based on satellite positioning instead. Can be modified. These may be manually selected based on the judgment of each situation by the user, or automatic determination such as replacement when the movement distance by satellite positioning is larger than the integrated value of the movement amount is performed. May be good.

As described above, in the electronic clock 1 of the present embodiment, the difference value between the measurement unit 45 that measures the physical quantity related to the movement amount and the position of the result of the latest two positionings is the cumulative value of the movement distance of the own machine. A second addition process for adding to 421 is performed, a movement amount is calculated based on the measurement result of the measuring unit 45 during a period determined based on a predetermined condition, and the movement amount is added to the cumulative value 421. A control unit (CPU 41 and control unit 52) that performs the addition process in place of the first addition process is provided. The control unit does not perform the first addition process relating to the difference value including the movement distance within the measurement period of the movement amount added to the cumulative value 421.
In this way, when the movement amount based on the movement measurement is used together with the calculation of the movement distance by the cumulative calculation of the distance between the two latest points based on satellite positioning in the situation where the distance between the two latest points cannot be obtained, the movement is performed. Since the distance initially obtained when returning from measurement to satellite positioning overlaps halfway with the distance added based on the movement measurement, it is possible to obtain the integrated movement distance more appropriately by discarding this. it can. In addition, the real-time property of numerical value acquisition can be appropriately maintained.
In addition, the absolute position is calculated based on the result of the movement measurement, and the distance between the absolute position immediately before the restart and the current position obtained by the first positioning result after the restart depends on the cumulative value of the measurement error of the absolute position. Since the deviation of the movement amount is included, the accuracy of the integrated movement distance can be improved by not using the distance between the current positions obtained by different methods.

Further, the CPU 41 performs a second addition process based on a predetermined condition relating to the positioning state (including not only the success or failure of the actual positioning but also the transmission / reception state of the moving distance (integrated value 521) from the control unit 52 to the CPU 41). The period for adding the movement amount is determined by. That is, when the positioning result or the movement distance is not properly acquired, the movement amount obtained by the movement measurement is flexibly switched to the process of adding the cumulative value 421 so as not to cause duplication as described above when switching between the two. Since the timing processing is performed, the accuracy of the integrated movement distance can be improved.

Further, when the difference value is not obtained between the time when the positioning for which the difference value is acquired most recently is performed and the time when the upper limit reference time (3dt + α) elapses, the CPU 41 determines the positioning timing according to the upper limit reference time. That is, here, when the acquisition period of the movement amount to be added to the cumulative value 421 is started at the timing of positioning when the interval 3d elapses, and the difference value is acquired after this start, that is, the positioning is successfully obtained. When the difference value is acquired by the CPU 41, the acquisition period of the movement amount to be added to the cumulative value 421 is terminated at the timing of the second positioning in the calculation of the difference value. As a result, in particular, it is possible to appropriately adjust so that the overlap with the amount of movement to be added included in the total value 521 (movement distance) first obtained after returning to positioning is not added to the cumulative value 421. The accuracy of the distance can be improved.

Further, positioning is performed at a predetermined time interval (interval dt), and the upper limit standby time is twice or more (here, three times or more) of this time interval. Even if the acquisition is skipped a small number of times, if the integrated value 521 that is not initialized is acquired after that, the effect on the actual travel distance is small, and in many cases it does not lead to a decrease in accuracy, so some data acquisition skips are allowed. It may be done, and it is possible to continue to acquire an appropriate movement distance in a stable manner rather than switching to the movement measurement frequently.

Further, the control unit includes a CPU 41 and a control unit 52 of the satellite radio wave reception processing unit 50. The control unit 52 calculates the moving distance (difference value) based on satellite positioning and the integrated value 521. The CPU 41 requests the control unit 52 to output the integrated value 521, and when the output integrated value 521 is acquired, the CPU 41 adds the value of the integrated value 521 to the cumulative value 421 and integrates the integrated value 521 with the control unit 52. Command the initialization of the value 521. Since the CPU of the control unit 52 of the satellite radio wave reception processing unit 50 is set to have higher specifications than the CPU 41, the processing load can be appropriately distributed by performing the positioning calculation and the calculation of the moving distance in the control unit 52. Can be done. In this case, it may not be possible to reliably acquire the moving distance from the control unit 52 at the update interval of the moving distance according to the load of the CPU 41. In consideration of such a case, the control unit 52 calculates and holds the integrated value 521 to calculate a more accurate cumulative value 421 (total travel distance) without being affected by a slight failure to acquire the travel distance. can do.

Further, if the CPU 41 does not obtain the difference value (integrated value 521) according to the positioning between the time when the positioning for which the difference value is acquired most recently is performed and the time when the upper limit reference time (3dt + α) elapses, the CPU 41 does not obtain the difference value (integrated value 521). Do not select the first addition process. That is, when the difference value is not acquired even though the positioning operation should have been performed before the second addition process is selected (when the positioning result is not obtained or the positioning result is obtained). If it is not normally acquired by the CPU 41), it waits without performing the first addition process. As described above, since the control unit 52 calculates and holds the integrated value 521, even if the latest travel distance is not acquired due to an overload of the CPU 41 or the like, the travel distance for that amount can be acquired immediately at once. Become. Further, even if the positioning fails, the moving distance is often accurately represented by the straight line distance between them for a short period of time. Therefore, the moving distance can be appropriately obtained without further increasing the load on the CPU 41.

Further, the CPU 41 specifies the number of steps taken by the user based on the measurement result of the measuring unit 45, and multiplies the number of steps taken by a predetermined stride to calculate the amount of movement. In the case of movement by walking or running, it is difficult to calculate the direct movement distance in a stable manner such as the rotation of tires, so that a well-known technique for specifying the number of movement steps can be used. In the calculation of only the movement amount, which is a scalar value, the current position that can be estimated according to the movement amount by the movement measurement is separated from the position by satellite positioning, so that the influence of the deviation in the movement direction is suppressed to a small extent and the stride is set. It is possible to obtain an appropriate moving distance within the error range of.

Further, the electronic clock 1 includes a display unit 43, and the CPU 41 causes the display unit 43 to display a cumulative value 421. That is, by displaying the cumulative value 421 that is updated by the integration on the display unit 43, it is possible to make the user know the moving distance with appropriate accuracy in real time.

Further, the CPU 41 can add the movement amount by the movement measurement to the cumulative value and determine whether or not it is within the updating period. Here, the presence or absence of the sign M is switched and the cumulative value 421 is displayed. This makes it possible to know whether or not the travel distance is continuously and accurately calculated based on satellite positioning.

Further, the electronic clock 1 includes a receiving unit 51 of a satellite radio wave receiving processing unit 50 that receives radio waves from a positioning satellite. As described above, even if the electronic clock 1 in which the satellite radio wave reception processing unit 50, the CPU 41, and the measurement unit 45 are integrated, the amount of movement by the measurement unit 45 is easily and appropriately according to the positioning situation by the satellite radio wave reception processing unit 50. In combination with the measurement of, it is possible to display the total movement distance that is appropriately calculated with a simple configuration in the real-time measurement of the movement distance.
Further, since the judgment control in the processing on the side of the satellite radio wave reception processing unit 50 is complicated and it is not necessary to dedicate it to the application of the moving distance measurement of the present embodiment, the satellite radio wave reception processing unit 50 and eventually the satellite radio wave reception processing It is possible to suppress an increase in the cost of the electronic clock 1 including the unit 50.

Further, the moving distance measuring method (moving distance calculation process) of the present embodiment is a predetermined addition step of adding the difference value between the positions of the results of the last two positionings to the cumulative value 421 of the moving distance of the own machine. In the period determined based on the conditions of the above, instead of the first addition step, a second addition step of calculating the movement amount based on the measurement result of the measuring unit 45 and adding it to the cumulative value 421 is included. The period is determined so that the first addition step relating to the difference value including the travel distance within the period is not executed.
In this way, the distance initially obtained when returning from mobile measurement to satellite positioning overlaps halfway with the distance added based on mobile measurement, so the part containing this overlap is discarded (cumulative value). By starting the addition from the second time (without adding to 421), the integrated movement distance can be acquired more appropriately. In addition, the real-time property of numerical value acquisition can be appropriately maintained.

Further, by installing the program 62 that executes the processing of each of the above steps on the computer of the electronic clock 1 and executing the program 62, it is possible to easily and appropriately acquire the moving distance without imposing a load on the control operation itself.

The present invention is not limited to the above embodiment, and various modifications can be made.
For example, in the above embodiment, the walking state of the user is determined by the combination of the acceleration sensor and the geomagnetic field sensor, but another measuring unit may be used. For example, the method of gravitational acceleration may be specified by the tilt sensor to determine each direction component of the acceleration sensor. Further, the movement amount is not limited to the measurement of the movement amount by multiplying the number of movement steps and the stride length. For example, the amount of rotation of a bicycle wheel may be measurable.

Further, in the above embodiment, when the movement distance (integrated value 521) according to the positioning result is not acquired three times in succession from the satellite radio wave reception processing unit 50, the movement amount based on the movement measurement is added to the cumulative value 421. I switched to doing it, but it is not limited to 3 times. It may be any number of times, and may be one time.

Further, in the above embodiment, the positioning interval by the satellite radio wave reception processing unit 50 and the calculation of the movement amount by the movement measurement are both performed at 1-second intervals, but the present invention is not limited to this. Moreover, these time intervals may be different from each other. If the time interval is different and the addition of the travel distance (integrated value) by satellite positioning to the cumulative value 421 is resumed, the travel distance is calculated only at this timing so that there is no gap in the addition of the travel distance. The interval may be changed.

Further, in the above embodiment, after the acquisition of the positioning result is interrupted (consecutively failed), the distance at the time of restart and the total amount of movement by the movement measurement are stored in association with each other, and later the log is stored in the external device. Although it is possible to correct it at the time of browsing, the log may be confirmed and corrected by the electronic clock 1 itself. Further, for example, switching display may be possible between the two even during measurement based on a predetermined user operation on the operation reception unit 44.

Further, in the above embodiment, the display screen 11 of the display unit 43 is displayed in real time, but it is not always necessary to display the display. It may be switched to display other contents based on the user's input operation to the operation reception unit 44, or there may be no function of displaying the measurement distance in real time in the first place.

Further, in the above embodiment, the cumulative value 421 is displayed on the display screen 11 that performs digital display, but the display may be performed by another method. For example, the cumulative value 421 is operated by operating a pointer or the like. May be displayed.

Further, in the above embodiment, only the point where the cumulative value 421 is counted and displayed is shown, but the moving distance according to the split time or the moving distance for each predetermined measurement time according to the operation input or automatically ( It may be possible to count and display the movement pace) and the like.

Further, in the above embodiment, the satellite radio wave reception processing unit 50 is described as being provided in the electronic clock 1, but the integrated value of the moving distance from the satellite radio wave reception processing unit of the external device carried by the user together with the electronic clock 1 is calculated. It may be acquired. Further, the moving distance measuring device may be a module including a control microcomputer such as a CPU 41 and a measuring unit 45, to which the satellite radio wave receiving processing unit 50 can be connected.

Further, in the above embodiment, the cumulative value 421 is counted and displayed on the electronic clock 1, but it may be a portable electronic device other than the electronic clock 1. The portable electronic device may or may not have a timekeeping function.

Further, in the above embodiment, a memory 60 such as a flash memory has been described as an example as a computer-readable medium of the program 62 related to the movement distance calculation process, but the present invention is not limited to this. As other computer-readable media, other non-volatile memories and portable recording media such as CD-ROMs and DVD discs can be applied. A carrier wave is also applied to the present invention as a medium for providing data of a program according to the present invention via a communication line.
In addition, specific details such as the configuration, processing contents, and procedure shown in the above-described embodiment can be appropriately changed without departing from the spirit of the present invention.

Although some embodiments of the present invention have been described, the scope of the present invention is not limited to the above-described embodiments, but includes the scope of the invention described in the claims and the equivalent scope thereof.
The inventions described in the claims originally attached to the application of this application are added below. The claims in the appendix are as specified in the claims originally attached to the application for this application.

[Additional Notes]
<Claim 1>
A measurement unit that measures physical quantities related to the amount of movement,
The first addition process is performed to add the difference value between the positions of the results of the last two positionings to the cumulative value of the movement distance of the own machine, and the measurement result of the measurement unit is added during the period determined based on the predetermined conditions. A control unit that calculates a movement amount based on the movement amount and performs a second addition process of adding the movement amount to the cumulative value instead of the first addition process.
With
The control unit is a movement distance measuring device, characterized in that the first addition process related to the difference value including the movement distance within the period is not performed.
<Claim 2>
The moving distance measuring device according to claim 1, wherein the control unit determines the period for adding the moving amount by the second addition process according to the predetermined condition related to the positioning state.
<Claim 3>
The control unit starts the period at the timing of positioning according to the upper limit time when a predetermined upper limit time elapses from the positioning related to the latest addition of the difference value, and the difference value is set after the start of the period. The moving distance measuring device according to claim 2, wherein when obtained, the period is terminated at the timing of positioning at which the second result of the difference value is obtained.
<Claim 4>
The positioning is performed at predetermined time intervals,
The moving distance measuring device according to claim 3, wherein the upper limit time is at least twice the time interval.
<Claim 5>
The control unit includes a first control unit and a second control unit.
The first control unit calculates the difference value and its integrated value, and then
The second control unit requests the first control unit to output the integrated value, and when the integrated value output from the first control unit is acquired, the acquired integrated value is used as the cumulative value. The moving distance measuring device according to any one of claims 1 to 4, wherein the first control unit is instructed to initialize the integrated value in addition to the above.
<Claim 6>
When a predetermined upper limit time has elapsed from the latest positioning related to the addition of the difference value, the second control unit starts the period at the timing of positioning according to the upper limit time, and adds the latest difference value. The moving distance according to claim 5, wherein the first addition process is not selected when the difference value corresponding to the positioning is not obtained from the positioning according to the above to the elapse of the upper limit time. Measuring device.
<Claim 7>
Any of claims 1 to 6, wherein the control unit specifies the number of steps moved by the user based on the measurement result of the measuring unit, and calculates the amount of movement by multiplying the number of steps moved by a predetermined stride. The moving distance measuring device according to the first paragraph.
<Claim 8>
Equipped with a display
The moving distance measuring device according to any one of claims 1 to 7, wherein the control unit displays the cumulative value on the display unit.
<Claim 9>
The moving distance measuring device according to claim 8, wherein the control unit displays the cumulative value so that it can be determined whether or not the value is an updated value within the period.
<Claim 10>
The moving distance measuring device according to any one of claims 1 to 9, further comprising a receiving unit for receiving radio waves from a positioning satellite.
<Claim 11>
It is a moving distance measuring method of a moving distance measuring device provided with a measuring unit for measuring a physical quantity related to a moving amount.
The first addition step of adding the difference value between the positions of the results of the last two positionings to the cumulative value of the movement distance of the own aircraft,
A second addition step, in which, instead of the first addition step, a movement amount is calculated based on the measurement result of the measurement unit and added to the cumulative value during a period determined based on a predetermined condition.
Including
The moving distance measuring method, wherein the period is determined so that the first addition step related to the difference value including the moving distance within the period is not executed.
<Claim 12>
A computer equipped with a measuring unit that measures the physical quantity related to the amount of movement,
The first addition means, which adds the difference value between the positions of the results of the last two positionings to the cumulative value of the movement distance of the own aircraft.
A second addition means, which calculates a movement amount based on the measurement result of the measurement unit and adds it to the cumulative value, instead of the first addition means, during a period determined based on a predetermined condition.
To function as
The program is characterized in that the period is determined so that the difference value including the travel distance within the period is not added by the first addition means.

1 Electronic clock 10 Main unit 11 Display screen 12 Push button switch 20 Band 41 CPU
42 RAM
43 Display unit 44 Operation reception unit 45 Measurement unit 46 Oscillation circuit 47 Division circuit 48 Timekeeping circuit 49 Communication unit 50 Satellite radio wave reception processing unit 51 Reception unit 52 Control unit 60 Memory 61 Measurement data 62 Program 421 Cumulative value 521 Cumulative value M sign dt interval

Claims (12)

A measurement unit that measures physical quantities related to the amount of movement,
The first addition process is performed to add the difference value between the positions of the results of the last two positionings to the cumulative value of the movement distance of the own machine, and the measurement result of the measurement unit is added during the period determined based on the predetermined conditions. A control unit that calculates a movement amount based on the movement amount and performs a second addition process of adding the movement amount to the cumulative value instead of the first addition process.
With
The control unit is a movement distance measuring device, characterized in that the first addition process related to the difference value including the movement distance within the period is not performed. The moving distance measuring device according to claim 1, wherein the control unit determines the period for adding the moving amount by the second addition process according to the predetermined condition related to the positioning state. The control unit starts the period at the timing of positioning according to the upper limit time when a predetermined upper limit time elapses from the positioning related to the latest addition of the difference value, and the difference value is set after the start of the period. The moving distance measuring device according to claim 2, wherein when obtained, the period is terminated at the timing of positioning at which the second result of the difference value is obtained. The positioning is performed at predetermined time intervals,
The moving distance measuring device according to claim 3, wherein the upper limit time is at least twice the time interval. The control unit includes a first control unit and a second control unit.
The first control unit calculates the difference value and its integrated value, and then
The second control unit requests the first control unit to output the integrated value, and when the integrated value output from the first control unit is acquired, the acquired integrated value is used as the cumulative value. The moving distance measuring device according to any one of claims 1 to 4, wherein the first control unit is instructed to initialize the integrated value in addition to the above. When a predetermined upper limit time has elapsed from the latest positioning related to the addition of the difference value, the second control unit starts the period at the timing of positioning according to the upper limit time, and adds the latest difference value. The moving distance according to claim 5, wherein the first addition process is not selected when the difference value corresponding to the positioning is not obtained from the positioning according to the above to the elapse of the upper limit time. Measuring device. Any of claims 1 to 6, wherein the control unit specifies the number of steps moved by the user based on the measurement result of the measuring unit, and calculates the amount of movement by multiplying the number of steps moved by a predetermined stride. The moving distance measuring device according to the first paragraph. Equipped with a display
The moving distance measuring device according to any one of claims 1 to 7, wherein the control unit displays the cumulative value on the display unit. The moving distance measuring device according to claim 8, wherein the control unit displays the cumulative value so that it can be determined whether or not the value is an updated value within the period. The moving distance measuring device according to any one of claims 1 to 9, further comprising a receiving unit for receiving radio waves from a positioning satellite. It is a moving distance measuring method of a moving distance measuring device provided with a measuring unit for measuring a physical quantity related to a moving amount.
The first addition step of adding the difference value between the positions of the results of the last two positionings to the cumulative value of the movement distance of the own aircraft,
A second addition step, in which, instead of the first addition step, a movement amount is calculated based on the measurement result of the measurement unit and added to the cumulative value during a period determined based on a predetermined condition.
Including
The moving distance measuring method, wherein the period is determined so that the first addition step related to the difference value including the moving distance within the period is not executed. A computer equipped with a measuring unit that measures the physical quantity related to the amount of movement,
The first addition means, which adds the difference value between the positions of the results of the last two positionings to the cumulative value of the movement distance of the own aircraft.
A second addition means, which calculates a movement amount based on the measurement result of the measurement unit and adds it to the cumulative value, instead of the first addition means, during a period determined based on a predetermined condition.
To function as
The program is characterized in that the period is determined so that the difference value including the travel distance within the period is not added by the first addition means.

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