JP2012198824A - System and method for snow removal service management - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a snow removal service management system for helping a manager who manages snowplows and snow removal work to do work such as keeping a work diary of the snow removal work.SOLUTION: A snow removal service management system 10 comprises: a management division transmitting/receiving device 110 possessed by a snow removal management division which controls and supervises the snow removal work; a work division transmitting/receiving device 310 possessed by a snow removal work division which carries out the snow removal work and reports work content to the snow removal management division; a provider computer 210 managed by a particular provider which relays communication between these transmitting/receiving devices; a snowplow 350 used by the snow removal work division and identified by an identification mark; and an on-vehicle recording device 400 corresponding to the identification mark which can be mounted on the snowplow and can measure and record at least a position of the snowplow. The work division transmitting/receiving device reads a record of the on-vehicle recording device to transmit it to the provider computer, and the computer analyzes the record to display the work diary on which the work content about the identification mark, the position, and speed of the snowplow is written down.

Description

  The present invention relates to a snow removal operation management system, and more particularly to support for creating a snow removal work diary for a snowplow.

  Snowfall will adversely affect all transportation media including cars, trains and airplanes. In particular, snow on a road network all over the country will disrupt the traffic of cars and buses, making it difficult for people and goods to move.

  In order to avoid such a situation, each local government agency must respond quickly to snow accumulation and remove snow from the road as appropriate. Usually, a large number of snow removal companies (hereinafter also referred to as “snow removal work departments”) have registered with local governments (hereinafter also referred to as “snow removal management departments”), and the relevant administrative organization (snow removal management department) If necessary, contact the snow removal department to request snow removal. Local snow removal management departments such as municipalities need to receive a report on snow removal work from the requested snow removal work department and grasp the snow removal status of the road network in their area.

  For example, in a local government (snow removal management unit), an e-mail via a specific provider is used to exchange information with a number of snow removal work units. When the snow removal management unit determines that snow removal is necessary, the snow removal management unit transmits a snow removal request mail to the snow removal working unit via the specific provider. Only the snow removal work department registered with the specific provider receives this transmission, but the section for snow removal may be allocated by the snow removal management department for each supplier, in which case the snow removal management department has designated The snow removal request mail may be transmitted only to the snow removal working unit allocated to the snow removal section. The snow removal work department identifies the road from which snow has been removed and the registered snowplow, summarizes it in the work diary together with the work time, amount of snow, snow quality, work contents, etc., and again passes it through the specified provider to the snow removal management department. Report. By using a specific provider, communication between the snow removal management unit and a large number of snow removal work units becomes reliable and efficient.

  However, such reports are only self-reported by the snow removal work department and workers, and the snow removal management department that received the report cannot confirm the details, work time, snow removal status, etc. of the snow removal work by itself. It was impossible. The staff of the snow removal management department checks the large number of work diaries submitted by the snow removal work department, identifies roads that have been snow-removed, accounts for payment to the snow removal work department, organizes work diaries, and It was necessary to make a snow removal plan and to instruct the snow removal work department many times, and the burden of work during the snowy season was tremendous.

  On the other hand, in recent years, position confirmation using a GPS (Global Positioning System) satellite radio wave (hereinafter referred to as “GPS”) has become possible, and it has been applied to a car navigation device (hereinafter referred to as “car navigation”), a mobile phone, and the like. Yes. Portable GPS loggers and the like are also commercially available at a low price, and it is possible to track the position of the GPS logger itself over time and record the locus data on general-purpose map data.

  An invention relating to such a snow removal work management system using GPS is disclosed in Patent Document 1. The snow removal work management system of Patent Document 1 is composed of an “on-board device mounted on a snowplow and a management device that receives the snow removal work status from this on-vehicle device”, and collects the position and work status of each snowplow. The purpose is to distribute the snow removal status to an information terminal of a general user so that the snow removal status can be easily grasped.

  The in-vehicle device is “first means for detecting the current position of the snowplow using GPS satellite radio waves, information on the snow removal work status, and information on the current position detected by the first means to the management device. 2 means ". In addition, the management device described above indicates that the information indicating the progress of the snow removal work is displayed on the road map based on the map database storing the road map information, the current position information of the snowplow received from the in-vehicle device and the information on the snow removal work status. A third means for recording, and a fourth means for transmitting a road map including information indicating the progress of the snow removal work to the inquiring information terminal in response to the inquiry request for the progress of the snow removal work via the network. Prepare.

  The above-mentioned invention makes it possible for an Internet user to grasp the progress of snow removal work with an information terminal such as a personal computer (hereinafter also referred to as “PC”), a mobile phone, or a car navigation system. In other words, it is possible to connect the in-vehicle device (snowplow), the management device that manages this device, and the Internet user via a communication network, so that the progress of snow removal work can be immediately known.

JP 2007-14917 A

  Therefore, the present invention takes into account the technical progress as described above and the problems of the snow removal business described above, and facilitates operations such as check of the manager who mainly manages the snowplow and the snow removal work and the creation of a snow removal work diary, The purpose is to provide a snow removal management system to support.

A snow removal operation management system according to the present invention includes a management unit transmitting / receiving device included in a snow removal management unit that directs and supervises snow removal work, and performs snow removal work by commanding and supervision of the snow removal management unit, and the work content is transferred to the snow removal management unit A snow removal operation management system comprising: a work part transmitting / receiving device included in a snow removal work unit that reports to the network; and a provider computer managed by a specific provider that relays communication between the management part transmitting / receiving device and the work part transmitting / receiving device via a network. A snow removal vehicle identified by an identification symbol used by the snow removal working unit, and a position R (t) ≡R of the snow removal vehicle at least at time t. a vehicle-mounted recording device that can measure and record (x (t), y (t), z (t)) and is associated with the identification symbol. The record of the in-vehicle recording device is read and transmitted to the provider computer, and the provider computer analyzes the transmitted record of the in-vehicle recording device, and at least the snowplow identification symbol and the snowplow at each time t position R (t), velocity _{v (t) ≡v (v x} (t), v y (t), v z (t)) and the work content to display the work diary describing the related, the snow removal management And the snow removal working unit can be renewed by making corrections and additions to the work diary via the management unit transmitting / receiving device and the working unit transmitting / receiving device, respectively.

Here, R (t) and v (t) are vector quantities. Hereinafter, in this specification, R (t) and v (t) are vector quantities, and x (t), y (t), z (t), v _x (t), v _y (t), v _z (T) is a scalar quantity.

  In the snow removal work management system according to the present invention, the in-vehicle recording device has a communication function, and may communicate with the working unit transmission / reception device, the provider computer, and the management unit transmission / reception device via the network. .

In the snow removal management system according to the present invention, the provider computer calculates an absolute value | v (t) | for each predetermined time interval Δt from the speed v (t) at each time t, and the predetermined speed threshold _v for each said time interval Δt with respect to _c | v (t) | determines _{<v c.}

を算出し、

かつ

を満足するとき、作業停止時間Ｔ_stop≡τ_２−τ_１および ［ｖ（ｔ）］_ｋに関する情報を前記作業日誌に表示する。ただし、Σ_{（ｉ＝０,ｋ−１）}：0からｋの整数ｉについての和の演算、ｆ（ｋ）：ｋに関する所定の関数。 Snow removal business management system according to the present invention, the provider computer, a predetermined time interval ΔT≡ relative (n-1) Δt (n is an integer), the | v (t) | satisfy _{<v c} 2 Two times τ ₁ and τ ₂ (τ ₂ −τ ₁ ≡ (k−1) Δt ≧ ΔT; k is an integer)

To calculate

And

Is satisfied, information regarding the work stop time T _stop ≡τ ₂ −τ ₁ and [v (t)] _k is displayed in the work diary. However, ₍ SIGMA) _{(i = 0, k-1)} : Operation of the sum about the integer i of 0 to k, f (k): The predetermined function regarding k.

In the snow removal work management system according to the present invention, the provider computer has a stop time T _stop '= τ ₂ ' -τ ₁ '= k'Δt in which the | v (t) | <v _c ' is continuously satisfied. When (k ′ is an integer) satisfies T _stop ′ ≧ ΔT ′ (k ′ ≧ n ′) for a predetermined time interval ΔT′≡n′Δt (n is an integer), information on the T _stop ′ is Display in work diary.

  In the snow removal work management system according to the present invention, the provider computer creates a snow removal map in which the locus of R (t) is represented on an electronic map.

  In the snow removal work management system according to the present invention, a snow removal work unit that has performed snow removal work on a snow removal section designated in advance by the snow removal management unit identifies the snow removal section according to a predetermined classification, and the work unit transmitting / receiving device performs the identification The snow removal section is transmitted to the provider computer, and the provider computer displays the specified snow removal section in the work diary.

In the snow removal work management system according to the present invention, the provider computer calculates an actual operation time T _work = T _reg -T _stop obtained by subtracting the T _stop from the work time T _reg , and at least the identified snow removal vehicle. Identification symbol, position R (t) at each time t of the snowplow, absolute value | v (t) |, the actual operating time T _work = (T _reg −T _stop ), the snow removal map, the identification Create a work diary that describes the snow removal section.

  In the snow removal work management system according to the present invention, the snow removal work unit performs work such as classification of snow quality, amount of snow, work contents, and downtime during snow removal work via the work part transmitting / receiving device in the work diary. The work diary can be updated by adding information.

  In the snow removal work management system according to the present invention, the snow removal management unit adds the correction / addition to the work diary by the snow removal work unit or the specific provider via the management unit transmitting / receiving device. Display instructions to update.

  In the snow removal work management system according to the present invention, the snow removal management unit displays on the work diary the approval of the contents of the work diary via the management unit transmitting / receiving device.

を算出し、

かつ

を判定し、最大の作業停止時間Ｔ_stop＝τ_２−τ_１を決定するステップと、
前記プロバイダー・コンピュータが、｜ｖ（ｔ）｜＜ｖ_ｃ’を連続して満足する停車時間Ｔ_stop’＝τ_２’−τ_１’＝（ｋ’−１）Δｔ（ｋ’は整数）が所定の時間間隔ΔＴ’≡（ｎ’−１）Δｔ（ｎは整数）に対してＴ_stop’≧ΔＴ’（ｋ’≧ｎ’）を満たすような最大の停車時間Ｔ_stop’＝τ_２’−τ_１’を決定するステップと、
前記プロバイダー・コンピュータが、前記作業停止時間Ｔ_stop＝τ_２−τ_１及び／又は停車時間Ｔ_stop’＝τ_２’−τ_１’より実質的な稼働時間Ｔ_work＝Ｔ_reg−Ｔ_stopを算出し、前記除雪作業部に支払う対価を算出するステップと、
前記プロバイダー・コンピュータが、前記除雪車の識別記号、該除雪車の実質稼働時間Ｔ_work＝（Ｔ_reg−Ｔ_stop）、除雪マップ、速度グラフ、除雪区間、除雪作業部に支払う対価等を記載した作業日誌を作成、表示するステップと、
前記管理部送受信装置と前記作業部送受信装置とを介して、前記除雪管理部と前記除雪作業部が前記作業日誌に修正・追加を加えてこれを更改するステップと、
前記管理部送受信装置を介して、前記除雪管理部は、前記作業日誌に該作業日誌の内容を
承認する旨の表示をして、除雪報告書を作成するステップと、
を含む。 The snow removal work management method according to the present invention comprises the steps of preparing a network in which the working unit transmitting / receiving device and the managing unit transmitting / receiving device communicate via a provider computer;
Preparing a snowplow for a snowplow working unit using the working unit transmitting / receiving device to perform a snowplow, and an in-vehicle recording device for mounting on the snowplow;
From the working unit transmitting / receiving device, registering the identification symbol of the snow removing working unit and the snowplow to be used and the in-vehicle recording device in the registration of the managing unit transmitting / receiving device;
Transmitting a request for snow removal request from the management unit transmission / reception device to the working unit transmission / reception device via the provider computer;
The vehicle-mounted recording device mounted on the snowplow records operation data during snow removal work of the snowplow;
The working unit transmitting / receiving device reads the record of the in-vehicle recording device and transmits it to the provider computer;
Arranging at least the identification symbol of the snowplow, the position R (t) of the snowplow at each time t, and the speed v (t) from the record of the in-vehicle recording device transmitted by the provider computer; ,
The provider computer calculates an absolute value | v (t) | of the speed from the speed v (t) at every predetermined time interval Δt, and at every time interval Δt with respect to a predetermined speed threshold value v _c | v (t) | determining the _{<v c,}
The provider computer, a predetermined time interval ΔT≡ relative (n-1) Δt (n is an integer), the _{| v (t) | <v} 2 two times tau ₁ satisfying _c, τ ₂ (τ ₂ −τ ₁ ≡ (k−1) Δt ≧ ΔT; k (≧ n) is an integer)

To calculate

And

Determining a maximum work stop time T _stop = τ ₂ −τ ₁ ;
The provider computer has a stop time T _stop '= τ ₂ ' -τ ₁ '= (k'-1) Δt (k' is an integer) that satisfies | v (t) | <v _c 'continuously. The maximum stop time T _stop '= τ ₂ ' that satisfies T _stop '≧ ΔT' (k ′ ≧ n ′) for a predetermined time interval ΔT′≡ (n′−1) Δt (n is an integer). Determining -τ ₁ ';
The provider computer calculates a substantial operation time T _work = T _reg -T _stop from the work stop time T _stop = τ ₂ −τ ₁ and / or the stop time T _stop '= τ ₂ ' −τ ₁ '. And calculating a price to be paid to the snow removal working unit,
The provider computer describes the identification code of the snowplow, the actual operation time T _work = (T _reg -T _stop ), the snow removal map, the speed graph, the snow removal section, the consideration paid to the snow removal work unit, and the like Creating and displaying a work diary,
The snow removal management unit and the snow removal work unit modify and add to the work diary through the management unit transmission / reception device and the work unit transmission / reception device,
Via the management unit transmission / reception device, the snow removal management unit displays on the work diary that the contents of the work diary are approved, and creates a snow removal report;
including.

  The snow removal management system according to the present invention includes a snow removal management unit (a snow removing jurisdiction local government) and a snow removal work unit (snow removal contractor), respectively, via a management unit transmission / reception device and a work unit transmission / reception device via a provider computer of a specific provider. Since the snow removal instruction and the snow removal work report are performed by the above, the snow removal business can be performed in a unified and well-organized manner.

  In this snow removal management system, the contents of snow removal work are automatically recorded on the on-board recording device installed in the snowplow and sent by the work unit transmitting / receiving device, and the provider computer that receives this automatically creates and displays the work diary. To do. This work diary is corrected by participation of the snow removal management department and the snow removal work department, and the provider computer creates the final work diary and sends it to the management section transmission / reception device. It is easy to direct and supervise the snow removal business by e-mail.

  In particular, the provider computer can automatically calculate the actual operating time of the snowplow and easily calculate the price paid by the snow removal management department to the snow removal work department, greatly reducing the administrative and administrative burden of the conventional snow removal management department. , Can establish a more accurate and reliable settlement system.

  The snow removal work management system of the present invention can be easily realized at low cost simply by supplementing an existing snowplow, provider, PC, etc. with an inexpensive portable in-vehicle recording device and creating a work diary creation program. .

In the snow removal work management system of the present invention, the provider computer and the management unit transmission / reception device identify the date of snow removal work, the snow removal vehicle, and the in-vehicle recording device based on the data transmitted from the snow removal work unit and the snow removal management unit, and perform snow removal. Record and save the position R (t), absolute value | v (t) |, actual operating time T _work (= T _reg -T _stop ) and snow removal map, photograph, snow-removed road, etc. Since it is possible, these records can be used as basic data when creating a snow removal plan of the snow removal management unit in the future.

1 is a schematic view of a snow removal work management system according to the present invention. The schematic diagram of the work diary concerning the present invention. The schematic of the snow removal map attached to the work diary concerning the present invention. The schematic diagram of the speed graph attached to the work diary concerning the present invention. Schematic of the work diary of Embodiment 1 concerning the present invention. Schematic of the speed graph of Embodiment 1 which concerns on this invention. Schematic of the work diary of Embodiment 2 concerning the present invention. The schematic of the speed graph of Embodiment 2 concerning the present invention.

Hereinafter, embodiments of a snow removal work management system according to the present invention will be described with reference to the drawings. Hereinafter, the same reference numerals are used for the same components throughout the drawings. As described above, R (t) and v (t) are vector quantities, and x (t), y (t), z (t), v _x (t), v _y (t), v _z ( t) is a scalar quantity.

  In the snow removal management system according to the present embodiment, as shown in FIG. 1, a jurisdiction local government in the snowy area (snow removal management unit 100), via a certain provider 200, one or more snow removal operators (snow removal work unit 300, 300 ′,..., Collectively referred to as “snow removal work unit 300” hereinafter) and requesting snow removal work, and receiving a snow removal report 30 regarding snow removal work from the snow removal work unit 300 via the specific provider 200. It shall be established by The specific provider 200 may be a department belonging to the snow removal management unit 100, or may be a provider operated by a specific person belonging to the snow removal operation unit 300.

  That is, referring to FIG. 1, the snow removal management system 10 according to the present invention includes a management unit transmission / reception device 110 included in the snow removal management unit 100 that directs and supervises snow removal work, and snow removal work by the command and supervision of the snow removal management unit 100. And a specific provider that relays communication between the management unit transmission / reception device 110 and the work unit transmission / reception device 310 via the network. 200 and a provider computer 210 managed by 200. As described above, the snow removal work unit 300 may be a plurality of snow removal operators (snow removal work units 300, 300 ′,...). It is assumed that / or registration 50 has been made. The communication includes communication via a telephone line, communication via mail or FTP via the Internet, and any other communication.

  The snow removal work management system 10 includes a snowplow 350Xi identified by an identification symbol (for example, Xi (X = A, B,..., I = 1, 2,...)) Used by the snow removal operation unit 300. Can be mounted on the identified snowplow 350Xi, and at least the position R (t) ≡R (x (t), y (t), z (t)) of the snowplow 350Xi at time t is measured / An in-vehicle recording device 400χj (χj is, for example, χj (χ = α, β,..., J = 1, 2,...)) That can be recorded and associated with the identification symbol Xi. To do. The x (t), y (t), and z (t) may be expressed by latitude, longitude, altitude, and the like, respectively. The in-vehicle recording device 400χj may be a commercially available portable GPS logger, which may be purchased by the snow removal management unit 100 or the specific provider 200, or may be owned by the snow removal operation unit 300, but at least the provider It needs to be registered in the registration 50 of the computer 210.

  Alternatively, the in-vehicle recording device 400χj may have a communication function and be able to communicate with the working unit transmission / reception device 310, the provider computer 210, and the management unit transmission / reception device 110 via the network. For example, a mobile phone having a GPS function and its record holding function may be used as the in-vehicle recording device 400χj. Therefore, in this case, when the work unit transmitting / receiving device 310 performs communication such as transmission / reception with the provider computer 210, the in-vehicle recording device 400χj directly communicates with the provider computer 210 without passing through the work unit transmitting / receiving device 310. Including the case where it is performed.

  X of the identification symbol Xi is, for example, the identification symbol of the type of the snowplow 350Xi (snowplow, truck, bulldozer, etc.) and the snowplow operation unit 300, 300 ′,. , 300 ′,..., And therefore, Xi is a registration symbol assigned to the snowplow 350Xi held by the snow removal work unit 300 by registering it in advance in the registration 50 of the provider computer 210, etc. is there. Also when registering in the registration 52 of the management unit transmitting / receiving apparatus 110, it is assumed that registration is performed with the same identification symbol.

  On the other hand, the identification symbol χj of the in-vehicle recording device 400χj is preferably a symbol corresponding to the identification symbol of the mounted snowplow 350Xi (for example, Xi = A3 and χj = α3), but the snow removal management unit 100 or the specific provider 200 For example, the serial number may be assigned arbitrarily, and each in-vehicle recording device 400 is registered in advance in the registration 50 and / or registration 52 of the provider computer 210 and / or the management unit transmission / reception device 110. The in-vehicle recording device 400χj mounted on the snowplow 350Xi records the position R (t) of the snowplow 350Xi at every time t, and the working unit transmitting / receiving device 310 reads the record and uploads it to the provider computer 210. To do.

That is, in the snow removal work management system 10, the work unit transmission / reception device 310 reads the record of the in-vehicle recording device 400χj and transmits it to the provider computer 210. Subsequently, the provider computer 210 analyzes the transmitted record of the in-vehicle recording device 400χj, and at least the identification symbol of the snowplow 350Xi, the position R (t) of the snowplow 350Xi at each time t, and the speed v (t) ≡v A work diary 20 in which work contents relating to (v _x (t), v _y (t), v _z (t)) are described is created and displayed. The on-vehicle recording device 400χj such as a normal commercially available GPS logger can record both the position R (t) and the speed v (t). The speed v (t) is determined by the provider computer 210 from the position R (t). It may be calculated directly.

  Accordingly, the provider computer 210 manages the snow removal work status of the snowplow 350Xi identified by the identification symbol Xi by recording at least the time t, the position R (t), and the speed v (t), and the work diary. By displaying in 20, it is possible to browse the snow removal management unit 100 and the snow removal work unit 300.

  Further, in the snow removal work management system 10 of the present invention, the snow removal management unit 100 and the snow removal work unit 300 add corrections and additions to the work diary 20 via the management unit transmission / reception device 110 and the work unit transmission / reception device 310, respectively. It is possible to renew. This renewal is made by using a known encryption method or authentication method, and making corrections and additions only from the management unit transmission / reception device 110 and the work unit transmission / reception device 310 used by the snow removal management unit 100 and the snow removal work unit 300, respectively. It is preferable to do so.

  For example, as shown in FIG. 2, the work diary 20 includes a snow removal date, a snow removal section, a route name, a snow removal distance, an identification symbol Xi of the snowplow 350Xi and an identification symbol χj of the in-vehicle recording device 400χj mounted on the snowplow 350Xi. The travel time, the amount of snowfall, the quality of snow, the status of snow removal work such as work classification, etc. are described.

  For example, in the present embodiment, the snow removal management unit 100 and the snow removal work units 300, 300 ′,... Contract in advance with respect to a predetermined snow removal section (route name) in which snow removal work is performed, the unit price of snow removal work, It is assumed that it is registered in the registration 52. When it is determined that snow removal is necessary, according to the snow removal plan created by the snow removal management unit 100, each work unit transmission / reception device 310, 310 ′,... From the management unit transmission / reception device 110 via the provider computer 210 based on the contract.・ Snow removal request is sent to. At this time, the provider computer 210 creates a work diary 20 in which, for example, the date and time related to “date and time” in FIG. 2, “route name” designated by the snow removal management unit 100, “snow removal distance”, and the like are described.

  Each of the working unit transmitting / receiving devices 310, 310 ′,... Mounts the in-vehicle recording device 400χj on the snowplow 350Xi to perform snow removal, and the record regarding the snow removal content is transmitted to the provider computer 210 together with the in-vehicle recording device 400χj. Then, the provider computer 210 writes this in the work diary 20. The data transmitted from the work unit transmitting / receiving device 310 to the provider computer 210 includes, for example, the identification symbols Xi and χj, time items related to “date and time”, “snow removal section”, “snow quality”, “work classification”, etc. Yes, the provider computer 210 is described in the work diary 20 as shown in FIG.

  The snow removal work unit that executed the snow removal work on the “snow removal section” designated in advance by the snow removal management unit 100 identifies the snow removal section according to a predetermined classification (route name), and the route name identified by the work unit transmitting / receiving apparatus 310 The information may be transmitted to the computer 210, and the provider computer 210 may display the specified “route name” in the work diary 20. Alternatively, the provider computer 210 holds the position data regarding the main trunk road in advance for the “route name” and “snow removal section”, and the snow removal locus R (t) of the snowplow 350Xi received from the work unit transmitting / receiving device 310. The “route name” on which the snowplow 350Xi removed snow may be identified and recorded in the work diary 20.

  The work diary 20 is attached with a snow removal map 22 and a speed graph 24 as shown in FIGS. 3 and 4, which is very useful for visualizing the work contents. Although the speed graph 24 will be described later, the provider computer 210 creates the snow removal map 22 in which the locus is overwritten on the predetermined electronic map 1000 based on the record of R (t) received from the working unit transmission / reception device 310. (FIG. 3). The electronic map 1000 may be general-purpose software such as a Google map, for example, and the snow removal map 22 can be created by recording the locus of R (t) on the electronic map 1000 by a known method. When displayed on the PC screen, the snow removal map 22 preferably has a function of displaying the time when the snowplow 350Xi was present at that position when one point of the locus of R (t) is clicked.

  The work diary 20 can describe other useful information in a useful format. Hereinafter, the contents and creation method of the work diary 20 including the above-described graph in the present invention will be described in more detail.

  One of the important items in creating the work diary 20 or the snow removal report 30 with as little human effort as possible is calculation of the compensation for the snow removal work that the snow removal management unit 100 pays to the snow removal work unit 300. Since the consideration paid by the snow removal management unit 100 is often a tax, the snow removal management unit 100 needs to verify the work time (such as the actual operation time of the snowplow 350Xi) reported by the snow removal work unit 300 and pay the consideration. However, there was not enough manpower to manage temporary snow removal work during the snowfall period, and sufficient verification was virtually impossible. Therefore, if the consideration is a reward for the actual operating time of the snowplow 350Xi, it is desirable that the provider computer 210 automatically calculates the actual operating time of the snowplow 350Xi.

Therefore, in the snow removal work management system 10 according to the present invention, the provider computer 210 calculates the absolute value | v (t) | of the speed from the speed v (t) at each time t for each predetermined time interval Δt, for each said time interval Δt relative velocity threshold _{v c} | _v (t) | determines _{<v c.} Predetermined time interval Δt is suitable as the time interval is determined, e.g., 30 seconds Toka 2 minutes, the predetermined speed threshold v _c, normally observed when doing removing snow Considering the content of the snow removal The speed of the snowplow 350Xi is, for example, 1.0 km / h. The absolute value | v (t) | of the speed v (t) of the snowplow 350Xi is calculated because v (t) <0 when the snowplow 350Xi backs, and v (t) even if it moves greatly. This is to eliminate <v _{c since it} is satisfied. Accordingly, the square of speed v ² (t) or the like may be used instead of the absolute value | v (t) |.

  In the work diary 20 or attached to the work diary 20, the horizontal axis represents time t (hours) and the vertical axis represents the absolute value of speed | v (t) | (Km / hour). By creating the speed graph 24 in which the motion is graphed, it is possible to visualize the state and progress of the snow removal work of the snowplow 350Xi as shown in FIG.

を算出し、

かつ

を満足するか否かを判定する。 In order to quantify the progress of the snow removal work and calculate the actual operation time, the provider computer 210 performs the above | v (n) for a predetermined time interval ΔT≡ (n−1) Δt (n is an integer). t) | _<v 2 two times satisfying _{c τ 1, τ 2 (τ} 2 -τ 1 ≡ (k-1) Δt ≧ ΔT; k (≧ n) is an integer) for

To calculate

And

It is determined whether or not the above is satisfied.

Here, Σ _{(i = 0, k−1)} represents a sum operation for an integer i of 0 or more and k−1 or less, and f (k) represents a predetermined function relating to k. Further, the predetermined time interval ΔT≡ (n−1) Δt is determined by Δt and an integer n determined to be appropriate. For example, when the snowplow 350Xi moves at a constant speed or less on average over ΔT = 10 minutes (| v (t) | <f (k) · v _c ; f (k) · v _c is, for example, 0.5 km / h )), If Δt = 2 minutes, n = 6.

In the above formula (1), the average speed [v (t)] _k of the snowplow 350Xi over the time interval (k−1) Δt (≧ ΔT) _k is the absolute value of the speed of the snowplow 350Xi in the same time interval | v ( t) represents the average of |. Further, in the expressions (2) and (3), f (k) is a predetermined function relating to k. For example, if f (k) = 0.5k, k [v (t)] _k <f ( k) · v _c means that the average speed [v (t)] _k of the speed v (t) of the snowplow 350Xi over the time interval (k−1) Δt (≧ ΔT) is 0.5v _c or less. To do. Therefore, Equation (2), the provider computer 210 in the formula (3) is, | average _<v a _c, which is a start point _{τ 1 | v (τ 1)} | <v c and | v (tau ₂₎ Speed [v (t)] The maximum time τ ₂ (τ ₂ −τ ₁ ≡ (k−1) Δt ≧ ΔT) at which _k is 0.5v _c or less is determined. In other words, the provider computer 210 determines that the time average speed ([v (t)] _k ) starting from τ ₁ where | v (τ ₁ ) | <v _c is constant speed (f (k) · v _c = 0.5v _c ) The maximum time τ ₂ (| v (τ ₂ ) | <v _c ) that is less than or equal to is found and the work stop time T _stop ≡ (k−1) Δt that is greater than or equal to ΔT that can be regarded as almost stopped. (= Τ ₂ −τ ₁ ≧ ΔT) is detected.

The provider computer 210 may display information on the work stop time T _stop ≡τ ₂ −τ ₁ , τ ₁ , τ ₂ and [v (t)] _k in the work diary 20.

The work stop time T _stop ≡τ ₂ −τ ₁ that satisfies the conditions of the above equations (1), (2), and (3) is one of the criteria for determining the rest time of the snowplow 350Xi. However, if it is difficult to remove snow depending on the snow condition, or if it is necessary to remove the snow at the same place multiple times, or if it is necessary to stop the snowplow 350Xi, such as when manually working with a scoop, etc. If the average speed [v (t)] _k is significantly reduced, it can be sufficiently assumed. Therefore, in order to verify the actual operation time (rest time) of the snowplow 350Xi, the present invention proposes another work stop time T _stop '(hereinafter, T _stop ' is referred to as "stop time") as follows. .

That is, the provider computer 210 determines that the stop time T _stop ′ = τ ₂ ′ −τ ₁ ′ = (k′−1) Δt (k ′ is an integer) that satisfies | v (t) | <v _c ′ continuously. ) Satisfies T _stop '≧ ΔT ′ (k ′ ≧ n ′) for a predetermined time interval ΔT′≡ (n′−1) Δt (n is an integer), information on T _stop ′ is stored in the work diary 20. Describe and display in For example using the above _{quantities, v c '= 0.1v c,} ΔT' = ΔT, n '= When n, a predetermined time interval ΔT' (= ΔT) between above, the speed of the snowplow 350Xi | v ( t) | 'if (= 0.1 v _c) less, ₁ the starting time tau' is continuously _{v c,} the end time 'as, stoppage time _{T stop' τ 2 = τ 2} '-τ 1 'Is displayed on the work diary 20 as if it were a substantial break time.

As described above, in the snow removal operations management system 10 according to the present invention, the operating time T _work of snowplow 350Xi to automatically calculated, work stop time T _stop = τ ₂ -τ ₁ and / or T _stop '= τ ₂ ′ −τ ₁ ′ was defined, and the provider computer 210 decided to detect these times. Hereinafter, for the sake of simplicity, when the work stop time T _stop is described, it is assumed that T _stop = τ ₂ −τ ₁ and T _stop ′ = τ ₂ ′ −τ ₁ ′ are represented at the same time unless otherwise specifically used.

Next, the operation time T _work = T _reg −T _stop (or T _stop ′) is calculated using the work stop time T _stop or the stop time T _stop ′. T _reg is the operational time T _reg of snowplows 350Xi, for example, receives the vehicle recording device 400χj snow removal worker in snow removing portion 300, a time when actuated brought to plow 350Xi T _s, the termination operation of this If the time is T _f , then T _reg = T _f −T _s . The provider computer 210 calculates an operation time T _work = T _reg −T _stop obtained by subtracting the above T _stop from the work time T _reg, and multiplies it by a predetermined unit price determined in advance by the snow removal management unit 100 to each snow removal work unit. (Snowplow) Calculate the price paid to 300.

As described above, the provider computer 210 calculates a substantial operation time T _work = T _reg −T _stop by subtracting the T _stop from the work time T _reg , and at least the identified snowplow identification symbol Xi, snow removal Position R (t) of vehicle 350Xi at each time t, absolute value of speed | v (t) |, actual operation time T _work = (T _reg -T _stop ), snow removal map 22, the above identified snow removal section, snow removal work The work diary 20 describing the consideration paid to the section 300 is created.

  Finally, in the snow removal work management system 10 of the present invention, the snow removal management unit 100 and the snow removal work unit 300 modify and add to the work diary 20 via the management unit transmission / reception device 110 and the work unit transmission / reception device 310, respectively. In addition, renewal is possible. This renewal is made by adding corrections and additions only from the management unit transmission / reception device 110 and the work unit transmission / reception device 310 used by the snow removal management unit 100 and the snow removal work unit 300, respectively, by using a known method as described above. It is preferable to do so.

  The snow removal work unit 300 only stores the snow removal work unit 300 in the work diary 20 such as classification of snow accumulation amount, snow quality, work contents (manual work, etc.), downtime, etc. during the snow removal work via the work part transmitting / receiving device 310. The work diary 20 can be renewed by correcting or adding work information that cannot be known. These pieces of information can also be transmitted from the working unit transmitting / receiving apparatus 310 to the provider computer 210 in association with the recording of the in-vehicle recording apparatus 400χj. Pictures of the snow removal site before and after snow removal can be taken with a digital camera or the like and easily transmitted to the provider computer 210.

  In particular, when there is an objection about “operation time” and “consideration” calculated by the provider computer 210 and displayed on the work diary 20, a comment is specifically transmitted to the provider computer 210 in association with FIG. 3 or FIG. can do. For example, “In FIG. 4, the absolute value of the speed | v (t) | is 0, but the vehicle stopped in this time zone and snow removal work was performed with a scoop”. This comment is displayed on the work diary 20, and the provider computer 210 corrects the “operation time” and “consideration” by transmitting to the provider computer 210 that the snow removal management unit 100 has acknowledged, for example, The diary 20 is updated and displayed again.

In this way, the snow removal management unit 100 stores the work log 20 in the work diary 20 via the management unit transmission / reception device 110.
The snow removal working unit 100 or the specific provider 200 can display an instruction to update the work diary 20 with corrections, additions, comments, and the like. Further, the snow removal management unit 100 can display on the work diary 20 that the contents of the work diary are approved via the management unit transmission / reception device 110, and after the final approval, creates the snow removal report 30. To do.

  The snow removal work management method performed by the snow removal work management system 10 according to the present invention as described above can be summarized in the following procedure.

を算出し、

かつ

を判定し、最大の作業停止時間Ｔ_stop＝τ_２−τ_１を決定するステップと、
（１０）プロバイダー・コンピュータ２１０が、｜ｖ（ｔ）｜＜ｖ_ｃ’を連続して満足する停車時間Ｔ_stop’＝τ_２’−τ_１’＝（ｋ’−１）Δｔ（ｋ’は整数）が所定の時間間隔ΔＴ’≡（ｎ’−１）Δｔ（ｎは整数）に対してＴ_stop’≧ΔＴ’（ｋ’≧ｎ’）を満たすような最大の停車時間Ｔ_stop’＝τ_２’−τ_１’を決定するステップと、
（１１）プロバイダー・コンピュータ２１０が、作業停止時間Ｔ_stop≡τ_２−τ_１及び／又は停車時間Ｔ_stop’＝τ_２’−τ_１’より実質的な稼働時間Ｔ_work＝Ｔ_reg−Ｔ_stopを算出し、除雪作業部３００に支払う対価を算出するステップと、
（１２）プロバイダー・コンピュータ２１０が、除雪車の識別記号Ｘｉ、除雪車３５０Ｘｉの実質稼働時間Ｔ_work＝（Ｔ_reg−Ｔ_stop）、除雪マップ２２、速度グラフ２４、除雪区間、除雪作業部３００に支払う対価等を記載した作業日誌２０を作成、表示するステップと、
（１３）管理部送受信装置１１０と作業部送受信装置３１０とを介して、除雪管理部１００と除雪作業部３００が作業日誌２０に修正・追加を加えてこれを更改するステップと、
（１４）管理部送受信装置１１０を介して、除雪管理部１００は、作業日誌２０に作業日誌２０の内容を承認する旨の表示をして、除雪報告書３０を作成するステップと、
を含む。 That is, the snow removal work management method according to the present invention is:
(1) preparing a network in which the working unit transmitting / receiving device 310 and the management unit transmitting / receiving device 110 communicate via the provider computer 210;
(2) a step of preparing a snowplow 350Xi for the snowplow working unit 300 using the work part transmitting / receiving device 310 to perform a snowplow work, and an in-vehicle recording device 400χj for mounting on the snowplow 350Xi;
(3) The step of registering the identification symbols of the snow removal work unit 300 and the snowplow 350Xi and the in-vehicle recording device 400χj used by the work unit transmission / reception device 310 in the registration 50 (and / or registration 52) of the management unit transmission / reception device 110. When,
(4) transmitting a request for snow removal request from the management unit transmission / reception device 110 to the working unit transmission / reception device 310 via the provider computer 210;
(5) the on-board recording device 400χj mounted on the snowplow 350Xi records operation data during snow removal work of the snowplow 350Xi;
(6) the work unit transmitting / receiving device 310 reads the record of the in-vehicle recording device 400χj and transmits it to the provider computer 210;
(7) Data on at least the identification symbol of the snowplow 350Xi, the position R (t) of the snowplow 350Xi at each time t, and the speed v (t) from the record of the in-vehicle recording device 400χj transmitted by the provider computer 210 Step to prepare,
(8) provider computer 210, the absolute value of the velocity from the velocity v (t) | v (t ) | was calculated for each predetermined time interval Delta] t, said time every interval Delta] t with respect to a predetermined speed threshold value _{v c} and <determining _{v c, | v (t)} | to the
(9) provider computer 210, a predetermined time interval ΔT≡ (n-1) with respect to Delta] t (n is an integer), the _{| v (t) | <v} 2 two times satisfying _{c τ 1, τ 2} About (τ ₂ −τ ₁ ≡ (k−1) Δt ≧ ΔT; k (≧ n) is an integer)

To calculate

And

Determining a maximum work stop time T _stop = τ ₂ −τ ₁ ;
(10) The stop time T _stop '= τ ₂ ' −τ ₁ '= (k′−1) Δt (k ′ is the value at which the provider computer 210 continuously satisfies | v (t) | <v _c ′ The maximum stop time T _stop '= such that (integer) satisfies T _stop ' ≧ ΔT ′ (k ′ ≧ n ′) for a predetermined time interval ΔT′≡ (n′−1) Δt (n is an integer). determining τ ₂ '-τ ₁ ';
(11) The provider computer 210 has a substantial operation time T _work = T _reg -T _stop from the work stop time T _stop ≡τ ₂ -τ ₁ and / or the stop time T _stop '= τ ₂ ' -τ ₁ '. Calculating the price to be paid to the snow removal working unit 300;
(12) provider computer 210, the snowplow identification symbol Xi, substantially operating time T of the snowplow _{350Xi work = (T reg -T stop} ), snow map 22, the speed graph 24, snow interval, the snow removing portion 300 Creating and displaying a work diary 20 that describes the consideration paid, etc .;
(13) Steps in which the snow removal management unit 100 and the snow removal work unit 300 make corrections / additions to the work diary 20 via the management unit transmission / reception device 110 and the work unit transmission / reception device 310 to update the work diary 20,
(14) via the management unit transmitting / receiving device 110, the snow removal management unit 100 displays on the work diary 20 that the contents of the work diary 20 are approved, and creates the snow removal report 30;
including.

  Further, a specific example of the snow removal work management system 10 according to the present invention will be described below using an embodiment.

As described above, the record in the in-vehicle recording device 400χj is transmitted from the working unit transmitting / receiving device 310 to the provider computer 210, and the provider computer 210 uses the velocity graph 24 to calculate the absolute value | v (t) | of the snowplow 350Xi. Is displayed on the work diary 20. In this embodiment, when the speed graph 24 as shown in FIG. 5B is obtained, the work stop time T _stop = τ ₂ −τ ₁ , the stop time T _stop '= τ ₂ ' −τ ₁ ′, and the average speed [V (t)] The relationship between _k and the snow removal map 22 (FIG. 3) and the speed graph 24 will be described. In the present embodiment, | v (t) | < v velocity threshold _v c = 1km / time determines _{c, ΔT = (n-1} ) Δt for n = 11, Δt = 1 minute, [Delta] T = 10 min, Therefore _{τ 2 -τ 1 ≡ (k-} 1) k from Delta] t ≧ [Delta] t is 11 or greater, the formula (2) of _{k [v (t)] k} <f (k) · v in the determination of _c f (k ) = 0.5k. In addition, the predetermined hourly unit price set in advance by the snow removal management unit 100 is 12,000 yen.

Referring to FIG. 5B, the operation start time when the in-vehicle recording device 400 is mounted on the snowplow 350Xi and operated is T _s = 4 o'clock, and the operation end time is T _f = 6: 20 o'clock. _{| V (τ 1) | <} v c and _{| v (τ 2) | <} v satisfy _c tau _1, tau ₂ is at tau ₁ = 5, a 20-minute time tau ₂ = 5, the average speed during this period [V (t)] _{k = 21} = 0, and the work stop time is T _stop = 20 minutes. Similarly, the stop time T _stop '= τ ₂ ' -τ ₁ 'satisfying | v (t) | <v _c (= 1 km / hour) continuously for ΔT = 10 minutes is τ ₁ ' = 5 τ ₂ ′ = 5: 20 and the stop time T _stop ′ = 20 minutes. In this embodiment, T _stop = T _stop ′, and the work stop time and the stop time coincide.

Accordingly, the provider computer 210 obtains information such as the work stop time T _stop ≡τ ₂ −τ ₁ , the stop time T _stop '= τ ₂ ' −τ ₁ ′, and the actual operation time T _work as shown in FIG. Can be displayed in the work diary 20. In addition, the provider computer 210 calculates and displays the value for the snow removal work paid by the snow removal management unit 100 to the snow removal work unit 300 based on the information, and the snow removal management unit 100 and the snow removal work unit 300 explain the details of the snow removal work. A comment field for approval can be provided.

Next, the case where the speed graph 24 of the snowplow 350Xi is as shown in FIG. 6B will be described. T _s , T _f , v _c , ΔT, Δt, n, k, f (k), a predetermined hourly unit price, and the like are the same as those in the first embodiment.

The characteristics of the speed graph 24 shown in FIG. 6 (b) are the same as those of Example 1 (FIG. 5 (b)) between T _s = 4 o'clock to 4:10 and between 5 o'clock and T _f = 6: 20. On the other hand, from 4:10 to 5 hours, the snowplow 350Xi repeats the pattern of moving for 1 minute after stopping for 9 minutes.

In this embodiment, the stop time T _stop '= τ ₂ ′ −τ ₁ ′ satisfying | v (t) | <v _c (= 1 km / hour) continuously for ΔT = 10 minutes is τ ₁ ′ = 5 Hour, τ ₂ ′ = 5: 20, and the stop time T _stop ′ = 20 minutes, which is the same as in the first embodiment. On the other _{hand, | v (τ 1) |} <v c and _{| v (τ 2) | <} v c and the formula (2), tau ₁ satisfying the formula (3), tau ₂ is Example 1 with different tau ₁ = 4: 10 and τ ₂ = 5: 20. The average speed during this time is [v (t)] _{k = 71} = 5/70 (<0.5) km, and the work stop time is T _stop = 70 minutes.

As in the above embodiment, the provider computer 210 provides information such as the work stop time T _stop = τ ₂ −τ ₁ , the stop time T _stop '= τ ₂ ' −τ ₁ ′, and the actual operation time T _work as shown in FIG. It can be displayed on the work diary 20 as in a). Further, FIG. 6A shows the operation time T _work and the value based on the _stop time T _stop = 70 minutes, but the snow removal working unit 300 explains the circumstances in the comment column and describes the stop time T _stop '. = 20 minutes may be required, and the snow removal management unit 100 may transmit a comment requesting the provider computer 210 to perform the calculation of the price again based on this comment.

Although the snow removal operation management system according to the present invention has been described above, the present invention is not limited to the above-described embodiment and examples. Other actual operating time T _work or the like may be defined, and the calculation method of the actual operating time or the like can be flexibly changed according to the actual condition of snow removal work, snow quality, road conditions, and the like.

  In addition, the present invention can be carried out in a mode in which various improvements, modifications, and changes are added based on the knowledge of those skilled in the art without departing from the gist thereof.

  The snow removal operation management system according to the present invention can be used for a snow removal operation management system for facilitating and supporting operations such as a check of an administrator who manages a snow removal vehicle and a snow removal operation and creation of a snow removal operation diary 20.

10: Snow removal business management system 20: Work diary 22: Snow removal map 24: Speed graph 30: Snow removal report 50, 52: Registration 100: Snow removal management department (community)
110: management unit transmitting / receiving device 200: specific provider 210: provider computer 300: snow removal working unit (snow removal contractor)
310: Working unit transceiver 350: Snowplow 400: On-board recording device 1000: Electronic map

Claims (12)

A management unit transmitting and receiving device of a snow removal management unit that directs and supervises snow removal work;
A work part transmitting / receiving device included in a snow removal work part that performs snow removal work by supervision and supervision of the snow removal management part, and reports the work content to the snow removal management part;
A provider computer managed by a specific provider that relays communication between the management unit transmission / reception device and the working unit transmission / reception device via a network;
A snow removal management system including
A snowplow identified by an identification symbol used by the snow removal working unit;
The snowplow can be mounted on the identified snowplow, and at least the position R (t) ≡R (x (t), y (t), z (t)) of the snowplow at time t can be measured and recorded. An in-vehicle recording device associated with the identification symbol;
With
The working unit transmitting / receiving device reads a record of the in-vehicle recording device, transmits the record to the provider computer,
The provider computer analyzes the transmitted record of the in-vehicle recording device, and at least the snowplow identification symbol, the position R (t) of the snowplow at each time t, and the speed v (t).
Display a work diary that describes the work content for ≡v (v _x (t), v _y (t), v _z (t));
The snow removal management unit and the snow removal work unit can be revised and modified by adding corrections and additions to the work diary via the management unit transmission / reception device and the work unit transmission / reception device, respectively. The snow removal operation management system according to claim 1, wherein the in-vehicle recording device has a communication function and can communicate with the working unit transmission / reception device, the provider computer, and the management unit transmission / reception device via the network. The provider computer the absolute value of the velocity from the velocity v (t) at each time t | v (t) | is calculated at every predetermined time interval Delta] t, said time interval Delta] t with respect to a predetermined speed threshold value v _{c v} (t) | | <v determines _c, snow removal business management system according to claim 1 or 2 for each. The provider computer is
For a given time interval ΔT≡ (n−1) Δt (n is an integer)
About; (k is an integer _{τ 2 -τ 1 ≡ (k-} 1) Δt ≧ ΔT) wherein _{| | v (t) <v} 2 two times satisfying _{c τ 1, τ 2}

To calculate

And

When you satisfy
The snow removal operation management system according to claim 3, wherein information related to work stop time T _stop ≡τ ₂ −τ ₁ and [v (t)] _k is displayed in the work diary.
However,
Σ _{(i = 0, k−1)} : sum operation for integer i from 0 to k f (k): a predetermined function relating to k The provider computer is
The stop time T _stop '= τ ₂ ' -τ ₁ '= (k′-1) Δt (k ′ is an integer) satisfying | v (t) | <v _c ′ continuously is a predetermined time interval ΔT. The information on the T _stop 'is displayed in the work diary when T _stop ' ≧ ΔT '(k' ≧ n ') is satisfied for' ≡n 'Δt (n is an integer). Snow removal management system. The snow removal operation management system according to any one of claims 1 to 5, wherein the provider computer creates a snow removal map in which a trajectory of the R (t) is represented on an electronic map. The snow removal work unit that has performed snow removal work on the snow removal section designated by the snow removal management unit in advance specifies the snow removal section according to a predetermined classification,
The working unit transceiver transmits the identified snow removal section to the provider computer,
The snow removal operation management system according to any one of claims 1 to 6, wherein the provider computer displays the identified snow removal section in the work diary. The provider computer is
The actual operation time T _work = T _reg -T _stop (or stop time T _stop ') obtained by subtracting the T _stop from the work time T _reg is calculated.
At least the identification symbol of the identified snowplow, the position R (t) of the snowplow at each time t, the absolute value of the speed | v (t) |, the actual operating time T _work , the snow removal map, and the identification The snow removal work management system according to any one of claims 2 to 7, wherein a work diary in which a snow removal section is created is created. The snow removal work unit adds work information such as classification of snow quality, amount of snow, work content, and downtime during snow removal work to the work diary via the work unit transmitting / receiving device, and the work diary The snow removal operation management system according to claim 1, which can be renewed. The snow removal management unit, in the work diary via the management unit transmitting and receiving device,
The snow removal work management system according to claim 1 or 9, wherein the snow removal work unit or the specific provider displays an instruction to modify and add to the work diary and update the work diary. The snow removal management unit, in the work diary via the management unit transmitting and receiving device,
The snow removal operation management system according to claim 1 or 9, wherein a display to approve the contents of the work diary is displayed. Preparing a network for communication between the working unit transmission / reception device and the management unit transmission / reception device via the provider computer;
Preparing a snowplow for a snowplow working unit using the working unit transmitting / receiving device to perform a snowplow, and an in-vehicle recording device for mounting on the snowplow;
From the working unit transmitting / receiving device, registering the identification symbol of the snow removing working unit and the snowplow to be used and the in-vehicle recording device in the registration of the managing unit transmitting / receiving device;
Transmitting a request for snow removal request from the management unit transmission / reception device to the working unit transmission / reception device via the provider computer;
The vehicle-mounted recording device mounted on the snowplow records operation data during snow removal work of the snowplow;
The working unit transmitting / receiving device reads the record of the in-vehicle recording device and transmits it to the provider computer;
Arranging at least the identification symbol of the snowplow, the position R (t) of the snowplow at each time t, and the speed v (t) from the record of the in-vehicle recording device transmitted by the provider computer; ,
The provider computer calculates an absolute value | v (t) | of the speed from the speed v (t) at every predetermined time interval Δt, and at every time interval Δt with respect to a predetermined speed threshold value v _c | v (t) | determining the _{<v c,}
The provider computer, a predetermined time interval ΔT≡ relative (n-1) Δt (n is an integer), the _{| v (t) | <v} 2 two times tau ₁ satisfying _c, τ ₂ (τ ₂ −τ ₁ ≡ (k−1) Δt ≧ ΔT; k (≧ n) is an integer)

To calculate

And

Determining a maximum work stop time T _stop = τ ₂ −τ ₁ ;
Stop time T _stop '= τ ₂ ' -τ ₁ '= (k'-1) Δt (k' is an integer) in which the provider computer 210 continuously satisfies | v (t) | <v _c '. Is the maximum stop time T _stop '= τ ₂ such that T _stop ' ≧ ΔT ′ (k ′ ≧ n ′) satisfies a predetermined time interval ΔT′≡ (n′−1) Δt (n is an integer). Determining '−τ ₁ ';
The provider computer calculates a substantial operation time T _work = T _reg -T _stop from the work stop time T _stop = τ ₂ −τ ₁ and / or the stop time T _stop '= τ ₂ ' −τ ₁ '. And calculating a price to be paid to the snow removal working unit,
The provider computer describes the identification code of the snowplow, the actual operation time T _work = (T _reg -T _stop ), the snow removal map, the speed graph, the snow removal section, the consideration paid to the snow removal work unit, and the like Creating and displaying a work diary,
The snow removal management unit and the snow removal work unit modify and add to the work diary through the management unit transmission / reception device and the work unit transmission / reception device,
Via the management unit transmission / reception device, the snow removal management unit displays on the work diary that the contents of the work diary are approved, and creates a snow removal report;
Including snow removal management methods.

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