JPH04151800A - Disaster preventing system - Google Patents

Abstract

PURPOSE:To properly set a forecast level in accordance with circumstances of the place where each analog sensor is installed by raising the forecast level at the time when the difference value between a maximum value and a minimum value of the analog quantity exceeds a preliminarily set upper limit value but reducing the forecast level at the time when the difference value is lower than a lower limit value. CONSTITUTION:A maximum value and a minimum value of the analog quantity returned for each analog sensor S are stored in a storage means to take a history for a prescribed period. The difference value between the maximum value and the minimum value is obtained by a forecast level adjusting means and is compared with preliminarily set upper and lover limit values of the difference value, and the forecast level is raised when the difference value exceeds the upper limit value, and the forecast level is reduced when the difference value is lower than the lower limit value. Thus, the forecast level is properly set in accordance with circumstances of the place where each analog sensor is installed, and frequent forecasting is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a disaster prevention system that includes a monitoring device connected to a plurality of analog sensors through signal lines.

[Prior Art] As shown in FIG. 3, a conventional disaster prevention system has a plurality of analog sensors S and a repeater B installed on each floor, etc., and the repeater B sequentially and periodically connects the sensor line l. A plurality of analog sensors S connected with the . Repeater B judges whether there is a fire, etc., and transmits the above judgment result to receiver A, which is connected to repeater B through a transmission line, and displays the occurrence status of a busy area or above. There are distributed processing types.

By the way, if the above-mentioned disaster prevention system is a fire alarm system, repeater B determines that there is a fire when the temperature etc. exceeds a predetermined level as shown in Fig. 4 (the above level is hereinafter referred to as the fire level). In addition, there are levels that have not reached the level where it is determined that there is a fire but requires caution (hereinafter, this level is referred to as the forecast level), and those that are determined to be a fire and require the activation of fire prevention equipment such as fire doors. The level (hereinafter, this level will be referred to as the interlocking axis level) is determined. Then, when the repeater B determines the respective stratification, the repeater B transmits the fire report, forecast, and interlocking axis to the receiver A.

[Problems to be Solved by the Invention] By the way, in the conventional disaster prevention system of this type, the standards for setting each analog level of the fire level, forecast level, and interlocking axis level set at repeater B are based on the standards set by a person with extensive experience in the field. With such analog level setting standards, which are determined by humans, the forecast level is often set at an inappropriate level after the start of operation, resulting in frequent forecasts.
Even when security personnel check on-site, there are many cases where it is not considered to be a forecast, and this poses a problem in that the reliability of the disaster prevention system is compromised.

The present invention has been made in view of the above-mentioned points, and its purpose is to provide a disaster prevention system that does not cause frequent forecasts.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a monitoring device that includes a storage means for storing the maximum and minimum values of the analog quantities returned for each analog sensor, and Forecast level adjusting means is provided for raising the forecast level when the difference value between the maximum value and the minimum value exceeds a preset upper limit value, and lowering the forecast level when it falls below the lower limit value.

[Operation] As described above, the present invention provides a storage means for storing the maximum and minimum values of the analog quantities returned by the monitoring device for each analog sensor, and a storage means for storing the maximum and minimum values of the analog quantities returned for each analog sensor, and the difference between the maximum and minimum values of the analog quantities. By providing a forecast level adjustment means that increases the forecast level when the value exceeds a preset upper limit value and lowers the forecast level when the value falls below the lower limit value, the environment of the place where each analog sensor is installed can be adjusted. This allows the forecast level to be set appropriately depending on the situation, and prevents frequent occurrence of forecasts.

[Example] An embodiment of the present invention is shown in FIGS. 1 and 2. FIG.

In the disaster prevention system of this embodiment, a storage means for storing the maximum and minimum values of the analog quantities returned for each analog sensor S, and a difference value between the maximum and minimum values of the analog quantities are set in advance. This embodiment is characterized in that the repeater B is provided with a forecast level adjusting means that increases the forecast level when the upper limit value is exceeded and lowers the forecast level when the lower limit value is exceeded.6 In other words, in this embodiment, each analog sensing The maximum value and the minimum value of the analog quantity returned for each device S are stored in a storage means, and a history for a predetermined period is kept. Then, the difference value between the maximum value and the minimum value is determined by the forecast level adjustment means, and this difference value is compared with the preset upper and lower limit values of the difference value, and if the difference value exceeds the upper limit value, In this case, raise the forecast level as shown in Figure 1, and if the difference value is below the lower limit (then lower the forecast level as shown in Figure 2). The forecast level can be set appropriately according to the environment of the location where the prediction is made.
This prevents frequent forecasts from occurring. However, it goes without saying that the forecast level to be changed needs to be smaller than the fire level and larger than the maximum value of the analog quantity detected by the analog sensor S.

[Effects of the Invention] As described above, the present invention includes a storage means for storing the maximum and minimum values of the analog quantities returned for each analog sensor, and a storage means for storing the maximum and minimum values of the analog quantities returned for each analog sensor. The location where each analog sensor is installed is equipped with a forecast level adjustment means that increases the forecast level when the difference value exceeds a preset upper limit value and lowers the forecast level when it falls below the lower limit value. This has the advantage that the forecast level can be set appropriately depending on the environment, and forecasts do not occur frequently.

[Brief explanation of drawings]

1 and 2 are explanatory diagrams of a method of changing the forecast alarm according to an embodiment of the present invention, and FIG. 3 is a schematic configuration diagram of a disaster prevention system.
FIG. 4 is an explanatory diagram of the determination operation of the same repeater as above. A is a receiver, B is a repeater, S is an analog sensor, l is a sensor line, and L is a transmission line. Agent Patent Attorney Ishi 1) Chief 7 1 Figure 2

Claims (1)

[Claims] (1) A plurality of analog sensors and a monitoring device are connected by a signal line, and the monitoring device sequentially and periodically accesses each analog sensor, and receives temperature information from each accessed analog sensor.
In a disaster prevention system, the monitoring device sends back reply data indicating the smoke concentration or the analog amount of gas, etc., and the monitoring device makes a determination of fire, gas leak, etc. based on this reply data. storage means for storing the maximum and minimum values of the analog quantities; and a storage means for raising the forecast level when the difference value between the maximum and minimum values of the analog quantities exceeds a preset upper limit and falls below the lower limit. A disaster prevention system comprising: a forecast level adjusting means for lowering the forecast level in case of a disaster.