JPH0448884B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a snowplow construction data recording method that is attached to a snowplow or the like and collects information on snow removal work actually performed.

[Problems to be solved by conventional technology and invention]

Conventionally, in order to collect information indicating the status of snow removal work by snowplows, the record of the tachograph attached to the snowplow and the like was compared with the daily vehicle driving report prepared by the snowplow driver, and the actual snow removal work was carried out. The time spent working (actual working time) was checked.

With a tachograph, the distance traveled is recorded on a single sheet of recording paper.
Engine speed and running speed are mechanically recorded,
The actual working time is mainly determined based on the state of the traveling speed, but it is difficult to accurately determine the working state due to the relationship between forwarding, idling, etc. Furthermore, since the recording paper of a tachograph records very fine analog records within a narrow recording width, it is difficult to read the records and it is easy to make mistakes, making it difficult to check and confirm the actual working time. Ta.

Therefore, the detection output of a sensor that detects whether snow removal is being performed or not, and the output of a travel sensor that generates a signal related to the travel of the snowplow to which this sensor is attached, are sent at regular intervals, for example, every minute. Intake,
For example, Japanese Patent Laid-Open No. 61-90289 discloses a recording device that determines whether or not the vehicle is running based on the captured data, and writes the result of this determination to a storage medium together with data indicating the working status, etc. It has been proposed.

However, this proposed device does not collect detailed data on the operating status based on the constantly changing vehicle speed, so it is still not possible to accurately investigate and analyze the work status. Of course, it is possible to collect the daily operation status of snowplows using vehicle speed data and store it in a storage medium, but for example, if 10 hours worth of vehicle speed data is recorded in 1 byte in 0.5 second increments, In fact, a storage medium with a storage capacity of 72,000 bytes is required. There are any number of such large-capacity storage media available unless a particular storage medium is selected, but it is best to have each driver carry a storage medium, put it on at the beginning of the operation, take it out at the end, and hand over the storage medium to the administrator. If you want to use a storage medium such as an IC card, it is preferable to use a card-shaped storage medium such as an IC card, which is convenient to carry. However, this type of storage medium does not currently have a large capacity, and this is not possible.

SUMMARY OF THE INVENTION Therefore, the present invention seeks to provide a snowplow construction data recording method that allows detailed data on the snowplow work status of a snowplow to be collected using a storage medium with a storage capacity as small as possible. be.

[Means for solving problems]

In order to solve the above problems, the snowplow construction data recording method according to the present invention detects whether or not the snow removal device attached to the snowplow is being used for snow removal work, as shown in Fig. 1. The state data based on the detection output of the snow removal work state detection means (state sensors 23 ₁ to 23 _o ) is stored at first fixed time intervals, and the work time series data is stored in the state storage means (RAM 1
5) and detects the speed of the snowplow to which the snow removal device is attached (speed sensor 2).
2) The speed data detected in step 2) is stored at second fixed time intervals shorter than the first fixed time, and the speed time series data is recorded in the speed storage means (RAM 15), and the speed recorded in the speed storage means is The speed time series data is compressed by comparing the time series data with a predetermined pattern, and the working time series data stored in the state storage means and the compressed speed time stored in the speed storage means are It is characterized by collecting work time series data by writing series data to a portable storage medium (IC card 18).

In the above configuration, the work time series data consists of the state data detected by the snow removal work state detection means (state sensors 23 ₁ to 23 _o ) and the speed data detected by the snow removal vehicle speed detection means (speed sensor 22 ). Since the speed time series data is written to a portable storage medium (IC card 18),
By data-analyzing the contents of the portable storage medium by the processing device, it becomes possible to immediately know the detailed contents of the construction status of the snowplow. In addition, since the speed time series data is compressed by comparison with a predetermined pattern and then written to a portable storage medium, a storage medium with a small storage capacity, small size, and excellent portability is used. It becomes possible to do so.

〔Example〕

Hereinafter, a snowplow construction data recording method according to the present invention will be explained based on the drawings.

FIG. 2 is a block diagram showing an example of a snowplow construction data recording device configured using a microcomputer (CPU) and implementing the snowplow construction data recording method according to the present invention.
It is the CPU. The CPU 11 operates according to a predetermined control program stored in a read-only memory (ROM), not shown.
Performs many tasks such as display control, data exchange, and data processing. First of all, the CPU 11 has a display section 12.
and a keyboard 13 are connected. Display section 1
2 is composed of display elements such as LCD, VFT, and LED, and displays various information such as time and messages. The keyboard 13 is used as an input means for inputting various data to be described later, and is composed of a numeric keypad, various selection keys, and the like.

The CPU 11 also includes a real time generation circuit (RTC) 1.
4. Setting ROM 16 consisting of random access memory (RAM) 15 and electrically erasable programmable read-only memory (E ² PROM)
is connected. The RTC 14 generates real time data and constantly supplies it to the CPU 11. RAM15
temporarily stores data written by the CPU 11, and temporarily stores data written by the CPU 11.
11, and the temporarily stored data is backed up by a battery or the like so that it will not be erased if the power supply from the main power source (in-vehicle battery) is cut off. The setting ROM 16 is a non-volatile memory in which data such as a vehicle number, which will be described later, which is input by key operations on the keyboard 13, is written by the CPU 11. Since it is non-volatile, power supply is required to retain the data. I don't need it.

Further, an IC card 18 as a portable recording medium is removably connected to the CPU 11 via an IC card holder section 17. Furthermore, CPU1
1 is connected to a running pulse counter 19 and an interface circuit (I/F) 20. The driving pulse counter 19 has an I/F 20 connected to its input, and a vehicle speed sensor 2 via the I/F 20.
The running pulses supplied from the CPU 11 are counted and the count value is supplied to the CPU 11. The counter value of the running pulse counter 19 is changed at regular intervals.
It is read by the CPU 11 and reset immediately after being read.

In addition to the vehicle speed sensor 21 mentioned above, the I/F 20 has a rotation sensor 22 and a snow removal work status sensor 23 as its inputs.
₁ to 23 _o are connected. The vehicle speed sensor 21 generates a pulse every time the snowplow travels a predetermined distance, the rotation sensor 22 detects the rotation of the snowplow's engine, and the snow removal work status sensors 23 ₁ to 23 _o detect the snow removal equipment used for snow removal. For example, the snow removing device is composed of a correspondingly provided proximity switch, and detects whether or not the corresponding snow removal device is in use.

The data collected by the method of the present invention configured as described above is snow removal work data and speed time series data. Further, the snow removal work data consists of occasional data and work time series data, and the occasional data includes the type of snow removal device, classification of work, amount of fuel, driver code, etc. inputted using the keyboard 13.
When these data are input using the keyboard 13, the CPU 11 temporarily records them in the RAM 15 together with the date and time data from the RTC 14. Work time series data is obtained from vehicle speed sensor 21 and rotation sensor 2.
2. It consists of data representing the running of the snowplow, the engine operation, and the state of the snow removal work equipment based on the signals from the working state sensors 23 ₁ to 23 _o , and the CPU 11 reads the outputs of these sensors every second, for example, and calculates the cumulative value. Based on the value, it is written to the RAM 15, for example, every minute.

The speed time series data is obtained by the CPU 11 reading the count value of a running pulse counter 19 that counts pulses from the vehicle speed sensor 21 every 0.5 seconds, for example.
The data are obtained by converting the data into speed and are sequentially recorded in a predetermined area of the RAM 15.

The speed time series data temporarily collected in the RAM 15 is sorted into several patterns when recorded on the IC card 18 at a certain timing. An example of this pattern will be explained below.

Vehicle speed data Basically, when a sudden speed change occurs that exceeds the previous speed data by ±1 step (speed unit, e.g. 2.5 km/h), the speed at that point is recorded as is, as shown in Figure 3. The data length is fixed at 8 bits. Top 2 out of 8 bits
The bits represent the data pattern flag, and the lower 6 bits represent the speed. Each of the lower 6 bits is weighted from 1 to 32 as shown, and recorded so that speed data x speed unit (2.5 km/h) = speed. For example, the speed data shown in Figure 4 represents (1+2)×2.5Km/h=7.5Km/h.

Time compressed data The duration time when the same speed as the previous speed continues is recorded as shown in FIG. 5, and the data length is fixed at 8 bits. The upper 2 bits of the 8 bits represent the data pattern flag, and the lower 6 bits represent the time. Each of the lower 6 bits is weighted from 1 to 23 as shown in the figure, and is recorded so that time data x unit time (0.5 seconds) = duration time. For example, the example shown in FIG. 6 can represent (1+2+4+8) x 0.5 seconds = 7.5 seconds or (1+2+4+8+1) x 0. seconds = 8.0 seconds. Note that the latter is a case where time data 0 represents a unit time. In this example, only up to 32 seconds can be represented, but by increasing the number of bits used in units of 8 bits, a longer time can be represented.

Compressed data Recorded as shown in Figures 7 and 8, depending on whether the speed is accelerating in the range of +1 step or decelerating in the range of -1 step compared to the previous speed. The data length is variable from 10 bits to 73 bits. The upper two bits represent the pattern flag of this data, the next one bit represents an acceleration or deceleration flag, and the following bit represents the data area and data portion. The data area records how many bits are used in the data section, and the data section records speed changes from +1 step to -1 step.

For example, data "0" in the data section indicates that the speed is the same as the previous time in both acceleration and deceleration trends, and data "1" indicates a speed change of +1 step in acceleration trend and -1 step in deceleration trend. Represent each.

In the data example in Figure 8, the data area is 2+1
= 3, and +1 is added here because it is impossible for there to be no data, so "0" represents the number of data, 1. Data 1 is the previous speed
If it is 27.5Km/h, it represents 30Km/h, data 2 represents 30Km/h, which is the same as data 1, and data 3 represents 32.5Km/h. The data after data 3 is separate data, which can be seen from the value in the data area.

Compressed data +1 step to the reference value set at any point
This is a pattern in which the speed changes only in the range of 0 steps, recording as shown in FIGS. 9 and 10 is performed, and the data length is variable from 10 bits to 42 bits. That is, the upper 3 bits represent this pattern, and the following 1 bit represents the reference value determination flag. For example, the reference value flag "0" indicates that the same value as the previous speed is used as the reference value, and "1" indicates that the reference value is the previous speed minus one step.

The bits that follow are divided into a data area and a data section representing the number of data in the data section. For example, when the data part is "0", it represents the same speed as the reference value, and when it is "1", it represents the speed that is +1 step higher than the reference value.

In the data example in Figure 10, the number of data is 4+1
=5, data 1 is the same as the standard value, for example 30Km/h,
Data 2 is 32.5Km/h, Data 3 is 32.5Km/h,
Data 4 represents 32.5 km/h, and data 5 represents 30 km/h.

Compressed data When the speed changes by +1 step or -1 step with respect to the previous speed, recording is performed with a fixed length of 4 bits as shown in FIG.

By compressing the speed time series data as described above, it becomes possible to record one day's worth of speed data on the IC card 18. However, the driving patterns of snowplows vary depending on the vehicle type, driver, road conditions, etc., and if sufficient compression is not possible and the amount of data becomes large, multiple IC cards 18
It is necessary to record the

Therefore, when the capacity of one IC card 18 is exceeded, a message such as "memory over" is displayed on the display unit 12, and a buzzer (not shown) sounds to warn the driver, and the IC card is Urges you to replace 18 with a new one.
In this way, when recording is performed on a plurality of IC cards 18, a code indicating that recording is also performed on another IC card 18 is also recorded on the previous IC card 18.

The IC card 18 on which the predetermined recording has been performed is taken out from the IC card holder 17 and subjected to data analysis by a computer in the office.

During data analysis, in order to be able to distinguish which snowplow and which driver the data on the IC card 18 belongs to, the IC card 18 must have a number, for example, recorded therein. After specifying the mode by simultaneously operating two keys on the keyboard 13, inputs are made using the numeric keypad to distinguish between the two keys, and are recorded in advance in the setting ROM 16 and used. The designated mode is canceled by pressing a SET button (not shown).

Next, the overall operation will be explained with reference to the flowcharts of FIGS. 12 and 13.

When first started, initial data values are set in step S1, and the IC card 18 is set in step S2.
It is checked whether the IC card is set in the IC card holder 17 or not. If the IC card 18 is set, it is checked in step S3 whether or not it is the first IC card. If it is the first IC card, a key input by key operation on the keyboard 13 is performed in step S4. It is checked whether or not. If there is a key input, it is read in step S5, and based on the read input, key input processing is performed in step S6, and based on the processing result, work-time data is created in step S7. This work data is written to the RAM 15 in step S8.

In addition, when checking in step S3 above, the first
If it is not an IC card, proceed to step S9 to set RAM15.
The remaining data is read from. Also, if there is no key input at the check in step S4 above,
Steps S5 to S8 are skipped.

In step S10, it is checked whether the IC card 18 has any remaining capacity.
This is done by looking at the write address to card 18. If there is remaining capacity in the IC card 18, data is written to the IC card 18 in step S11.
If there is no remaining amount, in step S12, the IC card 18 is informed that there is no remaining amount, for example, by the sound of a buzzer and the display 12.
You will be warned by the display.

By the way, if it is found by checking in step S2 that the IC card 18 is not set, it is checked in step S13 whether or not a number has been written. If a number has been written, the key input is read in step S14, and then the setting ROM 16 is read in step S15.
The data read is written to. and step
Data is written to the IC card 18 in S16. On the other hand, if there is no number written in the check in step S13, it is checked in step S17 based on the signal from the rotation sensor 22 whether or not the engine is on. If the engine is on, a warning is given in step S18 that the IC card 18 is not set in the IC card holder 17.

After completing the above steps S11, S12, S16 or S18,
Alternatively, if the engine is off as determined by the check in step S17, the process returns to step S2, and the steps S2 to S18 described above are repeated.

If a timer interrupt is activated during the execution of each step in the flowchart in FIG. 12, especially if interrupts are not disabled, execution of the flowchart in FIG.
11) is added in the time counter. In the following step S21, the count value of the running pulse counter 19 is read. Then, based on the count value read in step S22, a distance calculation process is performed, and a speed calculation process is performed in step S23. In the subsequent step S24, processing for a warning buzzer is performed.

In step S25, each sensor 22, 23 ₁ to 23
It is checked whether the sensor _o is on or not, and if the check result indicates that the sensor is on, the sensor time counter (in the CPU 11) is incremented in step S26. When the sensor is not turned on as determined by the check in step S25, or after step S26 is executed, the process advances to step S27, where work time series data is created. step
The data created in S27 is transferred to RAM 1 in step S28.
5 is written.

Thereafter, in step S29, speed data compression processing is performed based on the speed data in the RAM 15. This compression process is performed by sequentially checking each piece of speed data in the RAM 15 to see if any of the speed data corresponds to one of the five patterns, as described above with reference to FIGS. 13 to 11.
Based on this processing result, speed time series data is created in step S30, and this is created in step S31.
It is written to RAM 15 and temporarily stored.

Next, in step S32, it is checked whether there is any remaining capacity in the IC card 18. If there is remaining capacity in the IC card 18, writing is performed in the IC card 18 in step S33, and if there is no remaining capacity, writing is performed on the IC card 18. Step S34
A warning that the battery is empty will be issued. After executing step S33 or S34, the process returns to the interrupted step in the main flowchart of FIG.

Note that in the above embodiment, an IC is used as a recording medium.
In the case of an IC card, the memory element part is used so that a backup power supply is not required.
Since it is composed of E ² PROM, writing time is slow, so it may be advantageous to provide a writing-only CPU. However, when a RAM pack is used as the recording medium, the configuration shown in the figure is sufficient because the writing time is fast.

In addition, although a running pulse counter is used in the illustrated embodiment, the running pulses are counted by the CPU 1.
1, and in this case, the traveling pulse counter is no longer necessary.

〔effect〕

As explained above, according to the present invention, work data and speed data of the snowplow can be obtained in chronological order, so subsequent analysis of the work situation can be performed very accurately and easily. By compressing the data, the capacity of the recording medium can be reduced, which is extremely advantageous in terms of handling and cost.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an apparatus for implementing the snowplow construction data recording method according to the present invention, FIG. 2 is a block diagram showing an embodiment of the present invention, and FIGS. 3 to 11 are data formats of speed data. Figures 12 and 13 are CPUs shown in Figure 2.
FIG. 23 ₁ to 23 _o ...Snow removal work state detection means (state sensor), 15...Status storage means, speed storage means (RAM15), 22...Speed detection means (speed sensor), 18...Portable storage medium ( IC card).

Claims (1)

[Scope of Claims] 1. Status data based on the detection output of a snow removal operation state detection means for detecting whether or not a snow removal device attached to a snow removal vehicle is being used for snow removal operation is stored at a first fixed time interval. record the work time series data in a state storage means, and record the speed data detected by the speed detection means for detecting the speed of the snow plow to which the snow removal device is attached to a second constant time shorter than the first constant time. storing the speed time series data for each time in a speed storage means, compressing the speed time series data by comparing the speed time series data recorded in the speed storage means with a predetermined pattern, and storing the state. Writing the work time series data stored in the means and the compressed speed time series data stored in the speed storage means into a portable storage medium to collect the work time series data and the speed time series data. A snowplow construction data recording method characterized by the following.