JP2007153371A - Fluid commodity automatic delivery system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a fluid commodity automatic delivery system for accurate production planning by using a hysteresis characteristic in judging a liquid level and by surely understanding the uncertain state of the liquid level. <P>SOLUTION: This fluid commodity automatic delivery system comprises a fluid body storage tank 9 installed at each of a plurality of users, a fluid amount measuring sensor 8 for measuring the fluid amount in each tank, a device for collecting the information of the measured amount and a remote center 1 for receiving the collected information and for collectively controlling the reduction of the fluid amount at the users. As a means to monitor the lower limit level of the fluid level, two levels, i.e. a higher level and a lower level are set. When the fluid level comes down, no alarm is emitted when the level comes lower than the higher level and an alarm is emitted when the level comes lower than the lower level. When the fluid body is refilled, no alarm is emitted when the level rises above the lower level and an alarm is emitted when the level rises above the higher level. When the alarm is generated, a delivery destination is determined automatically for delivery. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  This invention issues an alarm when the remaining amount of fluid goods such as kerosene, light oil, gasoline, LP gas, etc. falls below the set level, sends information, performs centralized management at the center, and automatically determines the delivery destination The present invention relates to a fluid goods automatic delivery system.

  In the conventional fluid commodity monitoring system, the second state is maintained for a predetermined time as a discriminating means for transitioning the state from the first state in which the amount of fluid in the tank is equal to or higher than the set level to the second state below the set level. As a result, the completion of the state movement is determined. Further, when the remaining amount of the fluid tank is equal to or higher than the set level, data is not transmitted to the seller, and an alarm is issued to the seller after the remaining amount falls below the set level (for example, see Patent Document 1). ).

Japanese Patent Laid-Open No. 9-24999 (page 7, FIG. 4)

  However, in the conventional fluid merchandise monitoring system, when the time from when the level falls below the set level (lower limit) until the alarm is issued is t, when t is set short, the liquid level fluctuates because the measurement target is liquid. Depending on the situation, there is a possibility of catching a state that happens to be below the lower limit. Conversely, if t is set longer, the liquid level may fluctuate within the time t even though it is actually lower, so that the lower limit may be exceeded and the t count may be reset. Can not monitor the amount of. In addition, when issuing an alarm to the seller after the remaining amount falls below the set level, if the number of users to be monitored increases, replenishment is performed after the alarm is issued. It is very inefficient because the lorry is dispatched and replenished. In addition, there is a possibility that it becomes impossible to respond when an alarm is issued by a plurality of users at the same time.

  The present invention has been made to solve the above-described problems. By using hysteresis characteristics in the liquid level determination method, it is possible to more reliably grasp the indeterminate state of the liquid level, and to perform accurate production. It is an object of the present invention to provide an automatic fluid goods delivery system that can make a plan.

  In the fluid merchandise automatic delivery system according to the present invention, fluid storage tanks installed respectively for a plurality of users, a liquid amount measuring sensor capable of measuring the liquid amount in each fluid storage tank, and measurement by the sensor Product that collects information on the amount of liquid collected and a remote center equipped with a device that receives the collected information via a communication line and performs centralized management of liquid volume reduction for multiple users at once In the automatic delivery system, as a means to monitor the lower limit level of the liquid level, two levels, a higher level and a lower level, are set, and when the liquid level drops, the level drops below the higher level. When the time falls below the lower level without giving an alarm at the time, an alarm is issued. Up By turn off the alarm when Tsu, in which multiple users of liquid loss is monitored at a time at a remote center, to determine the destination automatically when the alarm came out, to delivery.

  According to the present invention, the hysteresis level is used in the liquid level determination method, and the liquid level status transition conditions are set to different conditions, so that the liquid level indeterminate state can be more reliably determined. . In general, a liquid level fluctuates in a liquid, and a precise remaining amount detector cannot absorb the characteristics of the liquid. In addition, this characteristic of the liquid can be easily realized by detecting the state of the remaining amount with the control device instead of absorbing the characteristic of the liquid at the sensor portion. Further, by changing the level setting according to the characteristics of the liquid and the frequency of use, it is possible to make a determination according to the field device and the liquid type. Since these methods can be realized by a control device, they can be readily applied to existing devices.

Embodiment 1.
FIG. 1 is a system configuration diagram showing the configuration of an automatic fluid goods delivery system in Embodiment 1 of the present invention, and FIG. 2 shows the amount of liquid in the tank and time of the fluid goods automatic delivery system in Embodiment 1 of the invention. FIG. 3 is a flowchart for explaining the operation of the fluid merchandise automatic delivery system according to the first embodiment of the present invention.
In FIG. 1, reference numeral 1 denotes a remote center system, which includes a CRT display 2, a server 3, and a transmission / reception device 4. Reference numerals 10a to 10c are a plurality of user systems connected to the center system 1 by a network 5 which is a communication line, and includes a transmission / reception device 6, a control device 7, a liquid amount measuring sensor 8, and a storage tank 9. 11 is a lorry vehicle. In the present invention, it is assumed that the remote center system 1 collectively monitors the state of the storage tank 9. The liquid quantity in the storage tank 9 is measured by the liquid quantity measuring sensor 8, and the control device 7 obtains the measurement data at a constant period. When an abnormality occurs in the amount of liquid in the storage tank 9, the information is transmitted from the transmission / reception device 6 on the user side to the transmission / reception device 4 on the center side via the network 5. Such information can be stored and managed by the server 3 in the center and confirmed on the CRT display 2. By transmitting the liquid amount information from the storage tank 9 to the center system 1, the liquid amount information can be inquired from the server 3 in the center. Further, the user systems 10a, 10b, 10c,... And a plurality of user systems are collectively managed by one center system 1.
FIG. 2 shows the relationship between the liquid level h in the storage tank 9 and the time t. Level 1 and level 2 are set for determining the liquid level, and 0 <level 1 <level 2. When the water level h of the liquid level becomes higher and lower and h <level 1, the control device 7 detects a liquid level abnormality in the tank and passes it to the center side through the transmitting / receiving device 6 on the user side. An alarm for abnormal liquid amount and information on the remaining amount of liquid are transmitted to a certain transmission / reception device 4, and the server 3 obtains the information. The center system 1 makes and executes a supply plan based on the information. When the liquid is supplied to the storage tank 9 and the water level h becomes h> level 2, the control device 7 detects the recovery of the liquid amount in the tank, and the transmitting / receiving device 4 on the center side through the transmitting / receiving device 6 on the user side. The information on the alarm release and the remaining amount of liquid is transmitted to the server 3 and the server 3 obtains the information.

The control device 7 on the user side is controlled as shown in the flowchart of FIG. That is, it starts when the control device 7 samples the amount of liquid in the storage tank 9. When starting, it is determined in step S1 whether a warning is being issued. If no warning has been issued, the process proceeds to steps S2 and S3. In steps S2 and S3, the amount of liquid in the storage tank 9 is determined. If the liquid water level h is level 2 <h in step S2, and if the liquid water level h is level 1 <h <level 2 in step S3, it is determined that the amount of liquid is sufficient, and the process is started. Return to. If level 1> h in step S3, it is determined that the remaining amount of liquid is insufficient, and the process proceeds to step S4 to issue an alarm. Then, the user who has issued the warning is specified in step S5, the delivery destination is determined in step S6, and delivery is started in step S7.
If a warning is being issued in step S1, the process proceeds to steps S8 and S9. In steps S8 and S9, the amount of liquid in the storage tank 9 is determined. If the liquid level h is not level 2 <h in step S8, and if the liquid level h is level 1 <h <level 2 in step S9, the warning level continues because the liquid level h is insufficient. To do. If the liquid water level h is level 2 <h in step S8, it is determined that the liquid amount has recovered, and the alarm is canceled in step S10.
By performing the control as described above, an indefinite state of the liquid level can be detected not by the sensor portion but by the control device.
According to the first embodiment, any liquid monitoring system terminal exchanges data with the storage tank 9. At this time, information of the storage tank 9 is transmitted to the center system 1 by the control device 7 and is collectively managed by the center system 1. Further, since the interface with the storage tank 9 is independent, the control device 7 can communicate with a plurality of types of storage tanks 9 with the same S / W. In addition, by sampling the liquid volume at a constant period and making a replenishment plan by predicting a decrease in the liquid volume, when there are a plurality of user systems, it can be replenished efficiently when an alarm is issued.

と表すことができるので、補給優先度が同じ場合は予測される液体がなくなるまでの時間で順位を決定することができる。
このように自動で補給の計画を立案することにより効率よく自動配送を行うことができる。 At this time, the delivery order is determined at the top of the supply priority play. When the replenishment priority is the same, the time estimated to run out of liquid is calculated.
When the current water level is _hl , the time until the liquid runs out is

Therefore, when the replenishment priority is the same, the rank can be determined by the time until the predicted liquid runs out.
Thus, automatic delivery can be performed efficiently by making a replenishment plan automatically.

Embodiment 3.
FIG. 5 is a flowchart for explaining the operation of the fluid merchandise automatic delivery system according to the third embodiment of the present invention.
The amount of liquid in the tank is monitored by the same method as in the first and second embodiments, and the amount of liquid in the tank is predicted by the same method as in the second embodiment. If a replenishment plan is made by the method of the second embodiment, replenishment can be performed efficiently, but there is a possibility that replenishment may be delayed if the liquid is suddenly reduced.
In this third embodiment, the amount of liquid decrease is predicted by the method of the second embodiment, a replenishment plan is made, and at the same time, the amount of liquid is monitored by the method of the first embodiment. An alarm is issued when it becomes. When an alarm is issued, the user is given the highest replenishment priority and the replenishment plan is reviewed.
Next, an example of the operation will be described. It is assumed that the liquid amount of each user is predicted by the method of Embodiment 2 at a certain time t1 and a replenishment plan is made, as shown in Table 2.

このように予測値だけで補給計画を立てるのではなく、液体の水位も同時に監視することにより、正確に自動配送を行うことができる。

Thus, instead of making a replenishment plan only with the predicted value, it is possible to accurately perform automatic delivery by simultaneously monitoring the liquid level.

BRIEF DESCRIPTION OF THE DRAWINGS It is a system block diagram which shows the structure of the fluid goods automatic delivery system in Embodiment 1 of this invention. It is a graph which shows the relationship between the liquid quantity in the tank of the fluid goods automatic delivery system in Embodiment 1 of this invention, and time. It is a flowchart for demonstrating operation | movement of the fluid goods automatic delivery system in Embodiment 1 of this invention. It is a graph which shows the relationship between the liquid quantity in the tank of the fluid goods automatic delivery system in Embodiment 2 of this invention, and time. It is a flowchart for demonstrating operation | movement of the fluid goods automatic delivery system in Embodiment 3 of this invention. It is a graph which shows the relationship between the liquid quantity in the tank of the fluid goods automatic delivery system in Embodiment 4 of this invention, and time. It is a graph which shows the relationship between the liquid quantity in the tank of the fluid goods automatic delivery system in Embodiment 5 of this invention, and time.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Center system 2 CRT display 3 Server 4 Transmission / reception apparatus 5 Network 6 Transmission / reception apparatus 7 Control apparatus 8 Liquid quantity measurement sensor 9 Storage tank 10a-10c User system 11 Raleigh vehicle

Claims (5)

Fluid storage tanks installed by multiple users, liquid volume measurement sensors that can measure the liquid volume in each fluid storage tank, equipment that collects information on the liquid volume measured by the sensors, and collection A fluid product automatic delivery system comprising a remote center equipped with a device that centrally manages a decrease in the liquid volume of a plurality of users in a collective manner.
As a means to monitor the lower limit level of the liquid level, the higher level and the lower level are set, and when the liquid level is lowered, the alarm is not issued yet when the lower level is lowered. In addition, an alarm is issued when the level falls below the lower level, and when the liquid is replenished, the alarm is not turned off when the level above the lower level is exceeded, and the alarm is turned off when the level exceeds the higher level. The fluid goods automatic delivery system, which monitors the decrease in the liquid volume of a plurality of users at a remote center, determines the delivery destination automatically when an alarm is issued, and delivers it.   2. The fluid commodity automatic according to claim 1, wherein the amount of liquid in each fluid storage tank is monitored, the amount of liquid decrease is estimated based on past liquid decrease data, and a delivery plan is automatically prepared. Delivery system.   It is characterized by monitoring the amount of liquid in each fluid storage tank, inferring a decrease in the amount of liquid and automatically formulating a delivery plan, and when the amount of liquid falls below the set level, an alarm is issued and the delivery plan is automatically reestablished. The fluid goods automatic delivery system according to claim 1 or 2.   Monitor the amount of liquid in each fluid storage tank, and take into account various factors that affect consumption, such as the season, to estimate the amount of liquid decrease. The fluid goods automatic delivery system according to claim 2.   Monitors the amount of liquid in each fluid storage tank, estimates the amount of liquid decrease, automatically creates a delivery plan, issues a warning if the actual decrease amount is far from the estimated decrease amount, leaks liquid, etc. The fluid goods automatic delivery system according to claim 4, wherein an abnormality of the product can be detected in advance.

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