KR102280801B1 - Steel trading system - Google Patents

Abstract

Embodiments of the present invention are a receiver that receives transaction information including reinforcing bar information from a user terminal, a transmitter that provides transaction information to a user terminal, registers transaction information and deals with transaction information made between a seller and a buyer through the receiver and transmitter. It provides a reinforcing bar trading system comprising an analysis section for calculating the demand for rebar by receiving the buyer's process data or building characteristic data through the transaction intermediary unit and the receiving unit that mediate the transaction.
Accordingly, the embodiments of the present invention can diversify the rebar distribution structure by mediating rebar transactions online through the transaction intermediary that brokers the transaction of rebar and calculating the type, quantity, and input timing of rebar through the analysis unit. Reliable rebar unit price can be formed and rebar can be purchased at a low price in a timely manner according to the time of rebar input.

Description

Rebar trading system {STEEL TRADING SYSTEM}

The present invention relates to a rebar trading system, and more particularly, by accurately predicting the price of rebar to benefit the buyer or seller of rebar, and predicting the type, quantity, and input timing of rebar to be input according to construction progress. It relates to a rebar trading system for securing rebar at low cost before input.

Rebar is a rod-shaped steel material used to reinforce concrete by embedding it in concrete.

Since rebar is sold offline to construction companies through large, medium, or small distributors, it is difficult to diversify the distribution structure.

In addition, as rebar goes through several stages of distribution, an intermediate margin is added, and price fixing of rebar is possible between rebar manufacturers or distributors, so it is not possible to form a reasonable and reliable consumer unit price.

In addition, reinforcing bars are not input all at once during construction, but are divided several times during the construction period, so there is no need to purchase rebars all at once, and there is a difficulty in storing rebars when they are purchased all at once. Therefore, it is necessary to purchase reinforcing bars at a low price in a timely manner according to the time of rebar input. It is difficult for small and medium-sized builders to determine the appropriate rebar input time by themselves, and it is difficult to purchase rebar at a low price according to the rebar input time.

Korean Patent Registration No. 10-1723887 discloses a trade in waste metal resources that can efficiently trade by maximizing total profits for users who purchase or sell waste metal resources by accurately predicting the market price of waste metal resources. It relates to a transaction condition review system for , a purchase management module for inducing the purchase of a waste metal resource by calculating a profit or loss to be generated during a transaction according to transaction conditions including quantity and grade for a waste metal resource to be purchased; a sales management module for inducing the sale of waste metal resources that maximize the total profit of the waste metal resources by comparing and reviewing transaction conditions including quantity, grade, and market price for the waste metal resources to be sold with the total profit of the waste metal resources; an inventory management module for managing the inventory of waste metal resources by the amount of waste metal resources purchased and sold by the purchase management module and the sales management module and the storage and retrieval information of the waste metal resources stored in the server database; a transaction profit and loss review simulation module for examining the profit and loss between transactions by calculating the total profit generated during the transaction of the waste metal resource using the input/output information of the waste metal resource stored by the server database; and a market price prediction module for predicting a future price based on the past and present price of the waste metal resource using the input/output information of the waste metal resource stored by the server database. .

However, since the conventional resource trading system predicts unit price based only on the past or present unit price, it cannot actively reflect the transaction environment that affects the unit price of resources, such as actual supply or demand pattern, so that unit price prediction is inaccurate. In particular, as the natural environment such as the economic situation or climate is changing rapidly in recent years, it is necessary to predict the unit price by actively reflecting the transaction environment of resources.

In addition, the conventional resource trading system does not provide an efficient purchasing method for resources that can be purchased by dividing it several times, such as reinforcing bars required for construction work.

In order to solve the above-described problems, embodiments of the present invention include a receiver for receiving transaction information including reinforcing bar information from a user terminal, a transmitter for providing transaction information to a user terminal, and a seller through the receiver and transmitter to register transaction information. An object of the present invention is to provide a reinforcing bar transaction system including a transaction intermediary unit that mediates transactions for transaction information made between buyers and an analysis unit that receives the buyer's process data or building characteristic data through the receiver and calculates the demand for reinforcing bars.

In addition, embodiments of the present invention have an object to provide a rebar trading system that calculates the demand for underground and above-ground reinforcing bars among the total rebar quantity according to the number of floors through process data.

Another object of the present invention is to provide a rebar trading system that calculates rebar demand for each type of rebar from underground and ground rebar demand analyzed according to the number of floors.

In addition, embodiments of the present invention have an object to provide a rebar trading system that stores the total quantity correction coefficient divided according to the number of floors and calculates the total quantity of rebar by multiplying the total floor area by the total quantity correction coefficient.

In addition, embodiments of the present invention have an object to provide a rebar trading system for calculating the construction period according to the structure and the number of floors through the building characteristic data.

In addition, embodiments of the present invention provide a rebar trading system for predicting the unit price of rebar by estimating the supply amount of rebar through the production schedule of rebar or predicting the unit price of rebar based on the demand pattern of rebar.

One embodiment of the present invention for achieving the above object is a receiving unit for receiving the transaction information including the reinforcing bar information from the user terminal; a transmitter providing the transaction information to a user terminal; a transaction intermediary unit that registers the transaction information and mediates a transaction for the transaction information made between the seller and the buyer through the receiving unit and the transmitting unit; and an analysis unit for receiving the purchaser's process data or building characteristic data through the receiving unit and calculating the rebar demand.

In an embodiment, the process data includes the number of floors, an area, a ground and underground process schedule, and the analysis unit may calculate the demand for underground and above-ground reinforcing bars among the total amount of reinforcing bars according to the number of floors through the process data.

In an embodiment, the analysis unit may calculate the rebar demand for each type of reinforcing bar from the underground and above-ground rebar demand analyzed according to the number of floors.

In an embodiment, the analyzer may store the total quantity correction coefficient divided according to the number of floors and calculate the total quantity of reinforcing bars by multiplying the total floor area by the total quantity correction coefficient.

In an embodiment, the building characteristic data may include a structure and the number of floors, and the analysis unit may calculate a construction period according to the structure and the number of floors through the building characteristic data.

In one embodiment, the analysis unit may predict the unit price of the rebar by estimating the supply amount of rebar through the production schedule of the rebar or predict the unit price of the rebar based on the demand pattern of the rebar.

As described above, embodiments of the present invention include a receiver for receiving transaction information including reinforcing bar information from a user terminal, a transmitter for providing transaction information to a user terminal, registering transaction information and performing between the seller and the buyer through the receiver and transmitter. By providing a rebar trading system that includes an analysis section that calculates the demand for rebar by receiving the buyer's process data or building characteristic data through the transaction intermediary section and the receiving section that mediates transactions for transaction information, the rebar distribution structure can be diversified. It is possible to form a reasonable and reliable rebar unit price and has the effect of purchasing rebar at a low price in a timely manner according to the time of rebar input.

In addition, the embodiments of the present invention calculate the demand for underground and above-ground reinforcing bars among the total rebar volume according to the number of floors through process data, thereby accurately calculating the rebar volume according to the input timing of rebar, and purchasing reinforcing bars at a low price in a timely manner. there is an effect

In addition, the embodiments of the present invention calculate the rebar demand for each type of rebar from the underground and above ground rebar demand analyzed according to the number of floors, so that the type of rebar is accurately calculated according to the input timing of rebar to purchase rebar at a low price in a timely manner. can have an effect.

In addition, the embodiments of the present invention store the total quantity correction factor divided according to the number of floors and calculate the total quantity of rebar by multiplying the total area by the total quantity correction factor, thereby accurately calculating the quantity of reinforcing bars according to the time of reinforcing bar input. It has the effect of being able to purchase reinforcing bars at a price.

In addition, the embodiments of the present invention have an effect that, by calculating the construction period according to the structure and the number of floors through the building characteristic data, it is possible to purchase reinforcing bars at a low price in a timely manner according to the input timing of rebars.

In addition, the embodiments of the present invention predict the unit price of rebar by estimating the supply amount of rebar through the production schedule of rebar or predicting the unit price of rebar based on the demand pattern of rebar, thereby having the effect of accurately predicting the rebar unit price there is.

It is not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those of ordinary skill in the art to which the present invention belongs from the following description.

The accompanying drawings are provided to help the understanding of the present invention, and provide embodiments together with detailed description. However, the technical features of the present invention are not limited to specific drawings, and features disclosed in each drawing may be combined with each other to form a new embodiment.
1 is a block diagram illustrating an example of a rebar trading system according to the present invention.
2 is a block diagram illustrating an example of a rebar transaction server according to the present invention.
3 is a block diagram illustrating an example of the type and quantity of reinforcing bars for each input period according to the present invention.
4 is a flowchart showing an example of a rebar trading method according to the present invention.

Since the description of the present invention is merely embodiments for structural or functional description, the scope of the present invention should not be construed as being limited by the embodiments described in the text. That is, since the present embodiments are capable of various modifications and may have various forms, it should be understood that the scope of the present invention includes equivalents capable of realizing the technical idea. In addition, since the object or effect presented in the present invention does not mean that a specific embodiment should include all of them or only such effects, it should not be understood that the scope of the present invention is limited thereby.

The rebar trading system disclosed in the following embodiments will be described in more detail with reference to each drawing.

1 is a block diagram illustrating an example of a rebar trading system according to the present invention.

Referring to FIG. 1 , a rebar trading system according to an embodiment may include a rebar trading server 100 , a user terminal 200 , and a rebar management server 300 .

The rebar transaction server 100 may be connected to the user terminal 200 and the rebar management server 300 through a communication network. Here, the communication network may refer to a network of a broad concept including a wired or wireless communication network.

The reinforcing bar transaction server 100 may receive transaction information including reinforcing bar information from the user terminal 200 . Here, the transaction information may correspond to sales information or purchase information.

Hereinafter, unless otherwise stated, sales information or purchase information is used as the same concept as transaction information.

The reinforcing bar transaction server 100 may also receive information for establishing a transaction, such as an intention to sell, an intention to purchase, a sales approval, or a purchase approval, from the user terminal 200 . When the rebar transaction server 100 receives sales information or purchase information, the rebar transaction server 100 may register the information to make a rebar transaction.

Here, the sales information may be information including the type and quantity of rebar the seller wants to sell, and the purchase information may be information including the type and quantity of rebar the buyer wants to buy. The sales information or purchase information may include a price, and the price may be a unit price or a total price.

On the other hand, here the type of reinforcing bar may be classified based on the diameter of the reinforcing bar. More specifically, each numerical value of the diameter may be viewed as one species, or a numerical range of the diameter may be viewed as one species, such as above or below the reference value, based on a specific numerical value of the diameter.

For example, a diameter of 13mm, a diameter of 16mm, and a diameter of 19mm may be classified into three types by considering the three figures of 13mm, 16mm, and 19mm as one species, and the range of less than 16mm in diameter and the range of 16mm or more in diameter based on the diameter of 16mm can be classified into two types by considering each as one species.

In addition, the intention to sell may be information indicating the seller's intention to sell with respect to the purchase information registered in the rebar transaction server 100, and the purchase intention is information indicating the purchaser's intention to purchase the registered sale information can be The reinforcing bar transaction server 100 may receive and register the purchase intention or the sale intention.

On the other hand, the intention to sell or purchase may include the quantity to be traded so that some transactions can be made. In addition, if the price is not included in the registered purchase information or the registered sales information, the intention to sell or purchase may include the price to be traded.

In addition, the sales approval may be information that establishes a transaction by approving the sale according to the contents of the purchase intention to the registered purchase intention purchaser when the purchase intention is registered with respect to the sale information registered in the rebar transaction server 100. . The purchase approval may be information for establishing a transaction by approving a purchase according to the contents of the sale intention to the registered seller of the sale intention when the sale intention is registered with respect to the purchase information registered in the rebar transaction server 100 .

The reinforcing bar transaction server 100 may receive information for canceling a transaction, such as purchase cancellation and sale cancellation, from the user terminal 200 .

The rebar transaction server 100 establishes a transaction such as sale information, purchase information, sale intention, purchase intention, sale approval or purchase approval to the user terminal 200 of the buyer or seller, or executes a transaction such as purchase cancellation or sale cancellation. It is possible to transmit information recommending transmission of information to be canceled or information informing that transmission is to be suspended. Through such transmission, the reinforcing bar transaction server 100 may recommend a transaction or inform a buyer or a seller to suspend or cancel the transaction.

The reinforcing bar transaction server 100 may receive process data or building characteristic data from the user terminal 200 of the purchaser. Process data or building characteristic data will be described in FIG. 2 .

In addition, the reinforcing bar transaction server 100 recommends a transaction for the sale information to the buyer or suspends or cancels the transaction depending on whether the sale information is related to the type, quantity, and input timing of the rebar required for construction. ) can be sent to inform

The rebar transaction server 100 may receive a production schedule of rebar from the rebar management server 300 .

Each configuration of the rebar transaction server 100 will be described in detail with reference to FIG. 2 .

The user terminal 200 may be connected to the reinforcing bar transaction server 100 through a communication network, and the user terminal 200 may mean a terminal of a buyer or a seller. Here, the user terminal 200 and the terminal are a notebook computer, a mobile phone, a smart phone (2G/3G/4G/LET, smart phone), a PMP (Portable Media Player), a PDA (Personal Digital Assistant) and a tablet PC (Tablet PC) may be any one of

The user terminal 200 may automatically recognize the reinforcing bar information included in a tag attached to the reinforcing bar in order to produce or manage rebar by a rebar manufacturer or a rebar distributor through a sensor of the user terminal 200 .

Here, the tag may include a character string or a barcode, and the sensor of the user terminal 200 may be a camera.

The user terminal 200 recognizes the reinforcing bar information such as the type of reinforcing bar by recognizing the characters on the tag through the sensor, or reinforcing bar information such as the type of reinforcing bar corresponding to the barcode after recognizing the bar code from the rebar manufacturer. there is.

In this way, by allowing the user terminal 200 to automatically recognize the reinforcing bar information, such as the type of reinforcing bar included in the tag attached to the rebar, the seller sells it to the reinforcing bar transaction server 100 through the user terminal 200 . When transmitting the information, it is possible to reduce the effort required to input the reinforcing bar information included in the sales information, and it is possible to prevent an error in rebar information input.

The rebar management server 300 may be connected to the rebar transaction server 100 through a communication network. The rebar management server 300 may transmit a production schedule of rebars to the steel transaction server 100 .

Here, the production schedule of the reinforcing bar may be information including the type, production amount, and production date of the reinforcing bars produced by each reinforcing bar manufacturer with respect to the reinforcing bars produced by various rebar manufacturers.

2 is a block diagram illustrating an example of a rebar transaction server according to an embodiment.

Referring to FIG. 2 , the reinforcing bar transaction server 100 according to an embodiment includes a receiving unit 110 , a transmitting unit 120 , an analysis unit 130 , a transaction intermediary unit 140 , a database 150 and a control unit 160 . may include.

The receiving unit 110 may receive sales information or purchase information from the user terminal 200, and in addition to the sales information or purchase information, information for establishing a transaction such as sales intention, purchase intention, sales approval or purchase approval can be received. and can receive information to cancel the transaction, such as purchase cancellation and sale cancellation.

In addition, the receiving unit 110 may receive the production schedule of the rebar from the rebar management server (300).

In addition, the receiver 110 may receive the process data or the building characteristic data from the user terminal 200 of the purchaser. The process data may include the number of floors, the area, the ground and underground process schedule, and the building characteristic data may include the structure and characteristics. Process data and building characteristic data will be described later.

Transmitting unit 120 establishes a transaction such as sales information, purchase information, sale intention, purchase intention, sale approval or purchase approval to the user terminal 200 of the buyer or seller, or cancel the transaction such as purchase cancellation or sale cancellation It may transmit information recommending the transmission of information for this purpose or information informing that the transaction is to be suspended.

The analysis unit 130 may predict the unit price of the reinforcing bar based on the transaction unit price of the reinforcing bar. More specifically, the analysis unit 130 predicts the price of the reinforcing bar by using a prediction technique after obtaining the transaction unit price for a certain period from the database 150 to be described later. Here, as the prediction technique, a simple moving average method, a weighted moving average method, or the like may be used.

In addition, the analysis unit 130 may estimate the rebar supply amount through the production schedule of the rebar to predict the unit price of the reinforcing bar. More specifically, if the analysis unit 130 obtains the production schedule of rebars from the rebar management server 300 through the receiver 110 or from the database 150 to be described later, it is possible to estimate the production and production date for each type of rebar. there is. Therefore, the analysis unit 130 estimates that the supply of each type of rebar will increase after each production date for each type of reinforcing bar, so that the unit price of each type of reinforcing bar will be lower than the current unit price by a certain value for a certain period from a specific date around the production date. predict that

At this time, the analysis unit 130 obtains the past rebar unit price and the past rebar production schedule from the database 150 to be described later in order to accurately predict the specific date, the constant period, and the constant value, and then the production schedule determines the rebar unit price. It can be reflected in the prediction by analyzing the effect on the

On the other hand, the analysis unit 130 may obtain the production schedule of the past rebar from the steel management server (300).

In addition, the analysis unit 130 may predict the unit price of the reinforcing bar based on the demand pattern of the rebar. More specifically, the analysis unit 130 every year, the construction starts mainly at the beginning of the year after the cold season, and the construction is delayed due to the rainy season or heat wave in the summer. In the fall, the construction is accelerated to prevent construction delay, and the construction is mainly completed at the end of the year. It is possible to analyze the demand pattern in which the demand for rebar increases and decreases through characteristics such as, and predicts the unit price of rebar based on the demand pattern of rebar.

For example, the analysis unit 130 estimates that the demand for rebar will increase at the beginning of the year when construction is mainly started, and estimates that the demand for rebar will decrease from the end of the year when the construction is mainly completed every year. It can be predicted that the unit price will be higher than the unit price before the construction start date by a certain value for a period similar to

In addition, the analysis unit 130 estimates that the demand for reinforcing bars will decrease from around the beginning of the rainy season and that the demand for rebars will increase from around the end of the rainy season, so that the unit price of rebar is constant than the unit price before the start of the rainy season for a period similar to the rainy season. It can be predicted that the value will decrease by the same amount.

At this time, the analysis unit 130 calculates the past rebar unit price, the past construction trend, the past rainy season start date or the rainy season from the database 150 to be described later in order to accurately predict the constant value and the start date when the unit price changes or the period in which the unit price changes. After obtaining the period, etc., it is possible to analyze the effect of the construction trend or the change in demand pattern due to the rainy season on the rebar unit price and reflect it in the forecast.

In this way, the analysis unit 130 can predict the rebar unit price based on the actual supply amount and demand pattern, such as a production schedule, rather than predicting the future rebar unit price based only on the past rebar unit price, so that the accuracy of rebar unit price prediction is increased. can

In addition, the analysis unit 130 may calculate the demand for reinforcing bars through the purchaser's process data or building characteristic data received through the receiving unit 110 .

Here, the process data may be information including the number of floors, area, and ground and underground process schedules, and the building characteristic data may be information including the structure and number of floors of a construction object.

More specifically, the analysis unit 130 obtains process data or building characteristic data from the user terminal 200 of the purchaser through the receiving unit 110 and needs to be put into construction as construction progresses through the process data or building characteristic data. Calculate the type, quantity and input timing of reinforcing bars.

First, we will look at how to calculate the type, quantity, and input timing of rebar to be input as construction progresses through process data.

First, let's look at how to calculate the input timing of rebar.

The time of rebar input can be set in advance at the beginning of every month or every week, or it can be set by the construction start date of each floor. Even if the rebar input period is set in advance at the beginning of each month or week, if the quantity of rebar is not secured at the beginning of each month or every week, in order to prevent construction delay, the quantity of rebar required for the construction of each floor is It is important to calculate the construction start date of each floor so that it can be secured.

However, since the process data can include the above-ground and underground process schedules for constructing a construction object, the construction start date of each above-ground and underground floor can be known directly through the process schedule, or the entire construction period can be divided by the number of floors. can be found indirectly. In the latter case, it is desirable to set the construction start date of each floor by making the construction period longer than other floors for floors that require special work, such as the lowest or upper floors. Here, the period for which the construction of the special floor is longer than that of the other floors may also be predetermined according to the complexity of the structure of the special floor.

That is, the input timing of the reinforcing bars of each layer can be calculated through the process data.

Second, we will look at how to calculate the quantity of rebar.

* The quantity of rebar can be viewed by dividing it into total rebar quantity, underground and aboveground rebar quantity, and rebar quantity by input period. Here, rebar quantity and rebar demand are used interchangeably.

Let's look at how to calculate the total rebar quantity.

The total amount of rebar required for construction can be calculated using the following formula. Here, the total floor area is the sum of the areas of all floors, and the total amount of reinforcing bars may mean the total weight of reinforcing bars input for construction.

<Equation 1>

In Equation 1, A is a total quantity correction coefficient, and the value of A may be different depending on the number of floors of a building.

Therefore, the analysis unit 130 stores the total quantity correction coefficient A divided according to the number of floors, searches for the value of A corresponding to the number of floors of the building through the number of floors of the building included in the process data, and calculates the area included in the process data. After calculating the total area through the above, it is possible to calculate the total amount of reinforcing bars by multiplying the value of A by the total area.

However, if the total amount of reinforcing bars is included in the process data, the total amount of reinforcing bars can be obtained directly from the process data without the need for the above calculation.

Next, we will look at how to calculate the quantity of underground and above-ground reinforcing bars.

Since the basement must be constructed to withstand the pressure from the ground in contact with the basement, more reinforcing bars per floor may be required than the ground floor. Therefore, in order to determine the amount of rebar required per floor or to determine the amount of rebar to be input every week or at the beginning of each month when constructing the basement or above ground, it is necessary to know the demand for rebar in the basement and above ground separately.

The underground and aboveground rebar demand can be determined as a ratio to the total rebar volume. For example, the ratio of demand for rebar to underground and above ground can be 4 to 6 or 3 to 7.

On the other hand, as the number of floors of a building increases, more pressure is applied to the basement floor than to the ground floor, so the ratio of the demand for reinforcing bars between the basement and the ground may vary depending on the number of floors of the building. For example, if the building has 10 floors, the ratio of the demand for rebar in the basement to the ground is 2 to 8, but if the building has 20 floors, the ratio of demand for rebar in the basement to the ground may be 3 to 7.

Therefore, the analysis unit 130 stores the ratio of the underground and above-ground rebar demand by dividing it according to the number of floors of the building, and through the number of floors of the building included in the process data, the underground and above-ground rebar demand ratio corresponding to the number of floors of the building is calculated. Search and divide the total amount of reinforcing bars obtained by the above-mentioned method according to the above ratio to calculate the amount of reinforcing bars in the basement and above ground.

Let's look at how to calculate the quantity of reinforcing bars for each input period.

As mentioned above, the time of reinforcing rebar can be set in advance at the beginning of every month or every week, or it can be set at the start date of each floor. If the input time of rebar is predetermined every month or at the beginning of every week, the analysis unit 130 can obtain the underground and above-ground construction periods through the underground and above-ground process schedules included in the process data, respectively, and set each construction period to the number of months. Alternatively, after converting to the number of weeks, by dividing the underground and above-ground rebar quantity obtained by the above-mentioned method by the number of underground and above-ground months or weeks, it is possible to calculate the quantity of reinforcing bars to be input at the beginning of each month or week.

For example, if the input time of rebar is set in advance at the beginning of each month, if the underground and above-ground process schedules are 10 and 20 months, respectively, and the underground and above-ground rebar volume is 300 kg and 700 kg, respectively, 300 kg is used for 10 months of underground construction. 30kg, which is the value divided by 10 months, can be input at the beginning of every month, and 35kg, which is 700kg divided by 20 months, can be input at the beginning of each month during 20 months of ground construction.

When the input time of rebar is determined as the construction start date of each floor, the analysis unit 130 divides the amount of rebar in the basement and above the ground by the number of basement floors and the number of above-ground floors, etc. The amount of reinforcing bars to be input on the construction start date of each floor can be calculated.

For example, if the input time of rebar is set as the construction start date of each floor, if the amount of rebar in the basement and above is 300kg and 700kg, respectively, and the number of floors in the basement and above is 3 and 10, respectively, 300kg on the construction start date of each basement floor 100kg divided by 3 should be input, and 700kg divided by 10 should be input on the construction start date of each floor above ground.

Third, the method of calculating the quantity of underground and above-ground rebar for each type of reinforcing bar and how to calculate the quantity of rebar for each type required at the time of input will be examined.

We will look at how to calculate the quantity of underground and above-ground reinforcing bars for each type of rebar.

Various reinforcing bars with different diameters can be used during construction, and reinforcing bars used for construction are generally classified into two types, based on the diameter of a specific value: rebar with a diameter less than a specific value and rebar with a diameter greater than a specific value. and the two types of reinforcing bars may have a weight ratio.

For example, in order to construct a building that requires a total rebar quantity of 100 kg, two types of rebar having a diameter of less than 20 mm and a rebar having a diameter of 20 mm or more form a weight ratio of 3:2, and 60 kg and 40 kg may be required, respectively.

On the other hand, as mentioned above, since the basement layer receives more pressure than the above-ground layer, more large-diameter reinforcing bars may be required for the basement layer. In addition, as the number of floors increases, the basement layer receives more pressure than the above-ground layer, so the ratio of large-diameter reinforcing bars required for the basement layer may increase more than the above-ground layer.

For example, since the basement layer receives more pressure than the above-ground layer, the weight ratio of reinforcing bars having a diameter of 20 mm or more to rebars having a diameter of less than 20 mm may be 6 to 4 in the basement and 2 to 8 in the above-ground layer. That is, the weight ratio of reinforcing bars having a large diameter in the basement layer may be greater than the weight ratio of rebars having a large diameter in the ground layer.

In addition, since the pressure applied to the basement increases as the number of floors increases, if the weight ratio of the basement floor in a 10-story building is 6 to 4 and the weight ratio of the ground floor is 2 to 8, in a 20-story building, the weight ratio of the basement floor is 9 to 1 and the above-ground layer may have a weight ratio of 3 to 7. That is, as the number of layers increases, the weight ratio of large-diameter reinforcing bars in the basement layer may increase more than the weight ratio of large-diameter reinforcing bars in the above-ground layer.

Therefore, the analysis unit 130 stores the two weight ratios of the underground and the above ground by dividing it according to the number of floors of the building, and through the number of floors of the building included in the process data, the two types of the underground and above corresponding to the number of floors of the building If you find the weight ratio and divide the quantity of underground reinforcing bars obtained by the above-mentioned method according to the above weight ratio, the quantity of reinforcing bars required in the basement is the quantity of two types of reinforcing bars: rebar having a diameter less than a specific value and rebar having a diameter greater than or equal to a specific value. can be calculated

Similarly, if the analysis unit 130 divides the quantity of ground reinforcing bars obtained by the above-mentioned method according to the above-mentioned weight ratio on the ground, the quantity of reinforcing bars required on the ground includes two reinforcing bars having a diameter less than a specific value and a rebar having a diameter greater than or equal to a specific value. You can calculate the quantity of reinforcing bars of each type.

Let's look at how to calculate the quantity of rebar for each type required at the time of input.

The analysis unit 130 stores the two weight ratios of the underground and above ground by dividing it according to the number of floors of the building, and the weight ratio of the two underground and above corresponding to the number of floors of the building through the number of floors of the building included in the process data. If the quantity of reinforcing bars obtained by the above-mentioned method is divided according to the above-mentioned weight ratio underground, the quantity of reinforcing bars required at the time of insertion in the basement is divided into two groups, one having a diameter less than a specific value and one having a diameter greater than or equal to a specific value. You can calculate the quantity of reinforcing bars of each type

Similarly, if the analysis unit 130 divides the amount of reinforcing bars on the ground obtained by the above-mentioned method according to the above-mentioned weight ratio on the ground, the amount of reinforcing bars required at the time of input on the ground includes reinforcing bars having a diameter less than a specific value and more than a specific value. The quantity of two types of reinforcing bars with diameter can be calculated.

In this way, the analysis unit 130 may calculate the type, quantity, and input timing of the reinforcing bar to be input as the construction progresses through the process data.

3 is a block diagram exemplarily showing an example of the type and quantity of reinforcing bars for each input period according to the present invention.

Referring to FIG. 3 , the type and quantity of reinforcing bars (lower graph) for each input period according to an embodiment may be calculated through process data (upper graph). More specifically, the analysis unit 130 calculates that reinforcing bars with large diameters (Maximum and Extended) are mainly input at the beginning of every month until September 2015, when the basement is mainly constructed in the process data (upper graph), and the process data (upper graph) In the graph), it can be calculated that from September 2015, when the ground floor is mainly constructed, rebar (Standard) with a relatively small diameter is mainly input at the beginning of each month.

Next, a method of calculating the type, quantity, and input timing of reinforcing bars to be input as construction progresses through the building characteristic data will be examined.

First, a method of calculating the input timing of rebar through the building characteristic data will be examined.

As mentioned above, the input timing of rebar can be set in advance at the beginning of every month or every week, or it can be set as the construction start date of each floor. Since the building characteristic data does not include the process schedule, it is possible to directly determine the construction start date of each floor. can't Therefore, the method of calculating the construction period can be looked at and the construction start date of each floor can be calculated through the construction period calculation method.

We will look at the method of calculating the construction period through building characteristic data and the method of calculating the construction start date of each floor in reverse.

If the structure of a construction object becomes complicated or the number of floors increases, the time required for construction may increase, and the total construction time may be as follows.

<Equation 2>

* In Equation 1, B, D, and C may mean the time required to construct the first floor above the ground, the uppermost floor, and the remaining floors except for the first floor and the uppermost floor, respectively. In addition, in Equation 1, B, D, and C may refer to the time required to construct the basement floor, the first basement floor, and the remaining basement floors except for the basement floor and the first basement floor, respectively.

The reason for the distinction between the basement and the ground is that, as mentioned above, the basement layer receives more pressure than the above-ground layer, so more work is required for the basement construction so that the basement layer can withstand the pressure well. Therefore, B, C, and D for calculating the construction time of the basement may be larger than B, C, and D for calculating the construction time of the above-ground floor.

Meanwhile, as the structure of the building becomes more complex, the values of B, C, and D may gradually increase. In general, the complexity of the structure of the building can be divided into three stages: simple, normal, and complex. Therefore, the B, C, and D values of the above formula can be obtained in advance through the structure of the building, so the time required for each floor can be calculated. If the construction start date of each floor is determined after the start of construction through the required time for each floor, the process schedule can be obtained, so the time to insert the rebar required for each floor can be calculated.

Therefore, the analysis unit 130 stores B, C, and D having two values of ground and underground according to the structure of the building, and through the structure of the building included in the building characteristic information, the underground and ground corresponding to the structure of the building. You can search for B, C, and D of the two types and calculate the input time of rebar required for each floor for each floor after the start of construction.

Second, we look at how to calculate the type and quantity of reinforcing bars to be input at the time of input as construction progresses through building characteristic data.

Since the process schedule can be calculated through the building property data in the above-mentioned way, if the building property data includes the number of floors and the area, the process data can be obtained through the building property data.

Therefore, the analysis unit 130 calculates the type, quantity, and input timing of the rebar through the above-mentioned process data through the method of calculating the type, quantity, and input timing of the rebar through the building characteristic data to be input as the construction progresses. can be calculated

The transaction intermediary unit 140 may register sales information, purchase information, sales intention, or purchase intention received from the user terminal 200 , and sales information made between the seller and the buyer through the receiver 110 and the transmitter 120 , or You can broker transactions for purchase information.

In addition, the transaction intermediary unit 140 may recommend a transaction for sale information or purchase information to the purchaser to benefit the purchaser according to the predicted rebar unit price, or inform the purchaser to suspend or cancel the transaction.

More specifically, the transaction intermediary unit 140 recommends the transaction if the current or future rebar price is higher than the price of the transaction for sales information or purchase information based on the price predicted by the analysis unit 130 and Alternatively, if the price of the future rebar is lower than the price of the transaction for sale information or purchase information, it notifies the user terminal 200 of the purchaser through the transmitter 120 to suspend or cancel the transaction.

Here, the price may mean a unit price, and the following price may correspond to the unit price.

In addition, here, the price of a transaction for sales information is the transaction price when a transaction is established through sales information. If the sales information includes a price, it may mean the price. If the sales information does not include a price, the purchase intention may mean the included price.

In addition, here, the price of the transaction for purchase information is the transaction price when the transaction is established through the purchase information. If the purchase information includes a price, it may mean the price. If the purchase information does not include a price, the price of the sale may mean the included price.

Also, here, recommending the transaction for the sale information may mean that the transaction intermediary unit 140 transmits information recommending that the purchase intention be transmitted with respect to the sale information to the user terminal 200 of the purchaser.

If the sale information does not include a price, the transaction intermediary unit 140 transmits information recommending that the purchase intention including the lowest price as the current or future rebar price be transmitted to the user terminal 200 of the purchaser. can

In addition, here, recommending a transaction for purchase information means that when the seller registers the intention to sell for the purchase information, the transaction intermediary unit 140 transmits the purchase approval for the purchase intention to the user terminal 200 of the purchaser. It may mean sending information recommending to do so.

If there are several sales intentions and each sales intention includes a price, the transaction broker 140 provides information recommending that the purchase approval be transmitted to the sales intention including the lowest price to the user terminal 200 of the purchaser. can send

Also, here, notifying that the transaction for sale information is withheld or canceled means that the transaction intermediary unit 140 transmits information recommending that the user terminal 200 of the purchaser do not transmit the purchase intention for the sale information but withhold Alternatively, when the purchaser has already transmitted an intention to purchase, it may mean transmitting information to the user terminal 200 of the purchaser to recommend that the purchase be cancelled.

Also, here, notifying that the transaction for purchase information is withheld or canceled means that when the seller registers the intention to sell with respect to the purchase information, the transaction intermediary unit 140 informs the user terminal 200 of the purchaser of the intention to sell. It may mean transmitting information recommending to withhold purchase approval instead of transmitting the purchase approval, or transmitting information recommending sending purchase cancellation to the user terminal 200 of the purchaser when the purchaser has already transmitted purchase approval.

On the other hand, the transaction intermediary unit 140 may recommend a transaction for the sale information to the buyer or inform the buyer to suspend or cancel the transaction depending on whether the sale information is related to the reinforcing bar predicted to be put into construction.

More specifically, the transaction intermediary unit 140 determines the type of rebar included in the sales information based on the type, quantity, and input time of the rebar predicted to be input to the construction by the analysis unit 130 . If it belongs to the type, it recommends a transaction for the sales information, and if the type of reinforcing bar included in the sales information does not belong to the predicted type of rebar, the buyer through the sending unit 120 to suspend or cancel the transaction for the sales information. of the user terminal 200 is informed.

Here, the meaning of recommending a transaction for sales information and notifying that a transaction on sales information is suspended or canceled is the same as described above.

In addition, when recommending a transaction for the sales information, the transaction intermediary unit 140 may preferentially recommend a transaction for sales information belonging to the type of rebar whose input time is imminent based on the predicted input time of the rebar. .

In addition, the transaction intermediary unit 140 is included in the sales information on the basis of the price predicted by the analysis unit 130 together with the type, quantity, and input time of the reinforcing bar predicted to be put into the construction by the analysis unit 130 . If the type of rebar belongs to the predicted type of reinforcing bar and the price of the predicted type of reinforcing bar from the present to the predicted input time is higher than the price of the transaction for the sales information, the transaction for the sales information is performed. can recommend

On the other hand, the type of rebar included in the sales information does not belong to the predicted type of rebar, or the price of the predicted type of rebar from the present to the predicted input time is lower than the price of the transaction for the sale information. In many cases, it is possible to notify the user terminal 200 of the purchaser through the transmitter 120 to suspend or cancel the transaction for the sale information.

Here, the price of the transaction for the sales information and the meaning of recommending the transaction on the sales information and notifying the suspension or cancellation of the transaction on the sales information are the same as described above.

Meanwhile, the transaction intermediary unit 140 may register the predicted type and quantity of reinforcing bars as the purchase information with reference to the input timing.

More specifically, the transaction intermediary unit 140 is based on the type, quantity, and input time of the rebar predicted to be input to the construction by the analysis unit 130 before the predicted input time, the type and quantity of the rebar predicted. is included in the purchase information and registered.

In addition, the transaction intermediary unit 140 predicts the prediction from the present on the basis of the price predicted by the analysis unit 130 together with the type, quantity, and input time of the rebar predicted to be put into the construction by the analysis unit 130 . It is possible to register the type and quantity of the predicted reinforcing bar in the purchase information at a time when the price of the predicted reinforcing bar is the lowest among the time until the input time.

The transaction intermediary unit 140 may recommend a transaction for sale information or purchase information to the seller, or inform the seller to suspend or cancel the transaction so as to benefit the seller according to the predicted price.

More specifically, the transaction broker 140 recommends the transaction if the current or future rebar price is lower than the price of the transaction for sales information or purchase information based on the price predicted by the analysis unit 130 and Alternatively, if the price of the future rebar is higher than the price of the transaction for the sale information or purchase information, it notifies the user terminal 200 of the seller through the transmitter 120 to suspend or cancel the transaction.

Here, the price of the transaction for the sale information and the price of the transaction for the purchase information are the same as described above.

Also, here, recommending a transaction for sale information means that when the buyer registers the intention to sell for the purchase information, the transaction intermediary unit 140 transmits the sale approval for the purchase intention to the user terminal 200 of the seller. It may mean sending information recommending to do so.

If there are multiple purchase intentions and each purchase intention includes a price, the transaction intermediary unit 140 provides information to the user terminal 200 of the seller for recommending transmission of sales approval for the purchase intention including the highest price. can send

Also, here, recommending a transaction for purchase information may mean that the transaction intermediary unit 140 transmits information recommending that the user terminal 200 of the seller transmit an intention to sell with respect to the purchase information.

If the purchase information does not include a price, the transaction intermediary unit 140 transmits, to the user terminal 200 of the seller, information recommending that the sale intention including the maximum price as the current or future rebar price be transmitted. can

Also, here, notifying that the transaction for sale information is withheld or canceled means that when the buyer registers the purchase intention with respect to the sale information, the transaction intermediary unit 140 informs the user terminal 200 of the seller about the purchase intention. It may mean transmitting information recommending to withhold sales approval instead of transmitting the sales approval to the seller, or transmitting information recommending sending sales cancellation to the user terminal 200 of the seller when the seller has already transmitted the sales approval.

Also, here, notifying that the transaction for purchase information is withheld or canceled means that the transaction intermediary unit 140 transmits information recommending that the user terminal 200 of the seller not transmit the intention to sell the purchase information but to hold it. Alternatively, when the seller has already sent an intention to sell, it may mean transmitting information to the user terminal 200 of the seller to recommend sending cancellation of the sale.

The database 150 may store the production schedule of the reinforcing bar received through the receiver 110 . In addition, it is possible to store the rebar unit price made in the rebar transaction server (100).

The database 150 is a concept including a computer-readable recording medium, and refers not only to a narrow database but also a database in a broad sense including a data record based on a file system, and even a simple set of logs is searched for. If data can be extracted by doing so, it is included in the scope of the database in the present invention.

Finally, the control unit 160 controls the overall operation of the reinforcing bar transaction server 100 , and controls between the receiving unit 110 , the transmitting unit 120 , the analyzing unit 130 , the transaction intermediary unit 140 , and the database 150 . You can control the flow or data flow.

4 is a flowchart showing an example of a rebar trading method according to the present invention.

Referring to FIG. 4 , the rebar trading method 400 according to an embodiment may include a receiving step 410 , an analyzing step 420 , and a determining step 430 .

In the receiving step 410 , the rebar transaction server 100 may receive sales information or purchase information from the user terminal 200 , and may receive a production schedule of rebars from the rebar management server 300 .

In addition, the reinforcing bar transaction server 100 can register sales information or purchase information, and receives the sales intention for the registered purchase information or the purchase intention for the registered sales information from the user terminal 200, can be registered.

In addition, the reinforcing bar transaction server 100 may receive, from the user terminal 200 , purchase approval for the registered sales intention or sales approval for the registered purchase intention.

The reinforcing bar transaction server 100 may perform the analysis step 420 and the determination step 430 when the sale information, purchase information, sale intention, purchase intention, sale approval, or purchase approval is received or at regular intervals.

In addition, the reinforcing bar transaction server 100 may predict the unit price of rebar by estimating the supply amount of rebar through the production schedule of rebar or predict the unit price of rebar based on the demand pattern.

In this case, the rebar transaction server 100 may predict the price by referring to the effect of the past production schedule or the past demand pattern on the past rebar unit price.

In addition, the reinforcing bar transaction server 100 may predict the type, quantity and input timing of rebar to be put into construction as construction progresses through process data or building characteristic data.

In the determination step 430 , the reinforcing bar transaction server 100 may recommend a transaction for sale information or purchase information to the purchaser to benefit the purchaser according to the predicted price, or inform the purchaser to suspend or cancel the transaction.

In addition, the reinforcing bar transaction server 100 may recommend a transaction for the sale information to the buyer or inform the purchaser to suspend or cancel the transaction depending on whether the sale information is related to the rebar predicted to be put into construction.

In addition, the rebar transaction server 100 may register the predicted type and quantity of rebar as the purchase information with reference to the input timing.

In addition, the reinforcing bar transaction server 100 may recommend a transaction for sale information or purchase information to the seller or inform the seller to suspend or cancel the transaction so as to benefit the seller according to the predicted price.

As described above, although described with reference to preferred embodiments of the present application, those skilled in the art can variously modify the present application within the scope without departing from the spirit and scope of the present invention described in the claims below. and may be changed.

100: rebar trading system 110: receiver
120: transmitter 130: analysis unit
140: transaction intermediary 150: database
160: control unit
200: user terminal

Claims (4)

delete a receiver for receiving transaction information including reinforcing bar information from a user terminal;
a transmitter providing the transaction information to a user terminal;
a transaction intermediary unit that registers the transaction information and mediates a transaction for the transaction information made between the seller and the buyer through the receiving unit and the transmitting unit; and
It includes an analysis unit that predicts the unit price of rebar by estimating the supply of rebar through the production schedule of rebar or predicts the unit price of rebar based on the demand pattern of rebar,
The analysis unit receives the production schedule including the type of reinforcing bar produced for each reinforcing bar manufacturer, the production amount and the production date from the reinforcing bar transaction server, and increases or decreases the unit price after the corresponding production date according to the increase or decrease of the production,
The transaction intermediary unit compares the current price of rebar with the predicted price based on the price predicted by the analysis unit and recommends or cancels the transaction. delete delete

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