JP2899349B2 - Sensor inspection device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sensor inspection device, and more particularly to a sensor inspection device configured to easily check for abnormalities of a plurality of sensors.

2. Description of the Related Art For example, in a gas station that handles combustible materials such as gasoline and light oil, various sensors such as an earthquake sensor, a flame sensor, and an optical sensor are provided to ensure safety, and when a detection signal is output from the sensor. An alarm is issued to notify the occurrence of an abnormality. When checking these various sensors, the power of the alarm device is turned off, and the operation check is performed by turning on an operation check lamp provided in each sensor.

Problems to be Solved by the Invention However, conventionally, in the case of a sensor without an operation confirmation lamp, or in a case where the operation confirmation lamp is directly visible depending on the mounting position of the sensor, an alarm device is sounded every time inspection work is performed. In order to prevent confusion, it is necessary to inform all the workers that the inspection of the sensor is to be performed in advance, and there has been a problem that the inspection work becomes large and troublesome.

Then, an object of the present invention is to provide a sensor inspection device which solved the above-mentioned subject.

Means for Solving the Problems The present invention provides a sensor in which a plurality of sensors are installed, each of which has a different detection target, an alarm unit that issues an alarm based on an output of the sensor, and a type and an installation position of the plurality of sensors. Display means for performing a graphic display by means of a sensor, and sensor checking means for disabling the alarm means, checking for an abnormality in each of the sensors, and displaying the result on the display means for each sensor.

Function The types and installation positions of multiple sensors are collectively displayed graphically on the display means, and the presence or absence of abnormalities of each sensor is checked sequentially, and the result is displayed on the display means to save labor for inspection work of each sensor. Can be

Embodiment FIG. 1 shows a schematic configuration of an embodiment of a sensor inspection device according to the present invention.

In FIG. 1, a control device (computer) 1 is a CRT.
A display (display means) 2; a keyboard 3 for performing various operations; and a sensor inspection means for checking the presence or absence of abnormalities of various sensors described later and displaying the result on the display 2.
4A, and sensor monitoring means 4B for monitoring various sensors.

FIG. 2 shows a sensor inspection monitor displayed on the screen of the display 2. The sensor inspection monitor has the same configuration as the plan view of the gas station 5 viewed from above. Note that various devices installed at the gas station 5 are indicated by symbol mar on the sensor inspection monitor for easy understanding.

Here, since the gas station 5 and the monitor have the same configuration and arrangement as described above, the specific structure of the gas station 5 will be described with reference to FIG.

The site of the refueling station 5 is substantially rectangular, and an office 6 in which the control device 1 is installed and a plurality of refueling devices 7a to 7d for refueling gasoline or light oil are provided in the site. I have. Although each of the four refueling devices 7a to 7d is indicated by a rectangular symbol mar in FIG. 2, it is actually installed at intervals enough to allow a customer's automobile (not shown) to pass through. I have. And each refueling device 7a ~ 7d
Although not shown, a refueling pump that pumps up the oil liquid stored in the underground tank, a flow meter that measures the refueling amount, a display that displays the integrated refueling amount, a refueling hose connected to the refueling pump, a refueling hose Each device such as a refueling nozzle provided at the tip is provided.

Optical sensors 8a and 8b for detecting that a customer's automobile has entered are installed near the entrance of the gas station 5 (the lower left corner in FIG. 2). 9a and 9b are flame sensors that detect fire,
It is installed near the refueling devices 7a to 7d. Reference numerals 10a to 10b denote earthquake sensors for detecting earthquakes, respectively, which are arranged on the corner diagonal of the site of the gas station 5.

The above-mentioned refueling devices 7a to 7d and various sensors (optical sensors 8a, 8b,
The flame sensors 9a and 9b and the earthquake sensors 10a to 10c) are each a control device 1
The control device 1 performs refueling management of each of the refueling devices 7a to 7d and monitoring and inspection processing of various sensors described later. Further, an alarm device 11 for issuing an alarm when an abnormality occurs is connected to the control device 1.

In addition, an underground tank (not shown) in which oil liquids such as gasoline and light oil are stored by oil type is buried under the gas station 1. At the time of refueling work, the oil liquid in the underground tank is pumped up by a pump (not shown) in each of the refueling devices 7a to 7b and supplied to a fuel tank (both not shown) of the vehicle.

As described above, when the refueling operation is performed, the sensor monitoring mode is set in the control device 1, and various sensors are monitored. Before or after the start of work, a sensor check mode is set by operating the keyboard 3 to check whether or not various sensors are operating normally.

Here, a process executed by the control device 1 operating as the sensor inspection device will be described. The operation program (sensor inspection means 4A, sensor monitoring means 4B) shown in FIG. 3 is stored in a memory in the control device 1.

In FIG. 3, in step S1 (hereinafter, "step" is omitted), the control device 1 first checks whether or not the sensor inspection mode is set. When the sensor monitoring mode is set in S1, the process proceeds to S2, executes the sensor monitoring mode process, and returns to S1. Normally, this sensor monitoring mode is set, for example, when the flame sensors 9a and 9b
When the occurrence of a flame is detected in the vicinity of a to 7d and its signal is output, or when the earthquake sensors 10a to 10c output the earthquake detection signal, a warning is issued from the alarm device 11 to notify the worker. At the same time, the oil supply pumps of the oil supply devices 7a to 7d are stopped to prevent the oil liquid from flowing out.

When the sensor inspection mode is set in S1, the process proceeds to S3 and the installation pattern of the entire fueling station 5 in which the arrangement positions of various sensors as shown in FIG. Display. Note that the symbol marks of various sensors are normally displayed in “blue” indicating that they are in the off state.

Subsequently, the flow proceeds to S4, where a command for checking the operation of the optical sensors 8a and 8b is transmitted. On the other hand, when the optical sensors 8a and 8b can operate normally, a response is returned from the optical sensors 8a and 8b.
The symbol marks 8a and 8b are switched from "blue" to "red" (on state). However, in the sensor inspection mode, the optical sensor
Even when 8a and 8b are turned on, the operation of the alarm device 11 and the abnormality detection processing is not performed.

However, when the optical sensors 8a and 8b cannot operate normally,
The symbol marks of the optical sensors 8a and 8b displayed on the display 2 remain "blue". As a result, the operator can see at a glance that the optical sensors 8a and 8b are inoperable due to some failure.

As described above, when there is an abnormality in the optical sensors 8a and 8b, the power supply to the abnormal optical sensors 8a and 8b is stopped and stopped. Therefore, the optical sensors 8a and 8b stop until they are repaired, and malfunction is prevented.

When the process of S5 is completed, the process proceeds to the next S6, where the flame sensors 9a, 9
Check the operation of b. In S6, an operation check command is transmitted to each of the flame sensors 9a and 9b as in S4. Then, in the next S7, when a response is returned from the flame sensors 9a and 9b, the flame sensor 9 displayed on the display 2 is returned.
The symbol marks a and 9b change from "blue" to "red" to indicate that they can operate normally. Also, the flame sensors 9a, 9
When b is inoperable due to some abnormality, the symbol mark remains "blue", indicating that the flame sensors 9a and 9b are out of order. Further, the abnormal flame sensors 9a and 9b are stopped, and power is not supplied until the repair is completed, thereby preventing malfunction.

When the process of S7 is completed, the process proceeds to the next S8, where the earthquake sensors 10a to 1
Check the operation of 0b. That is, in S8, each earthquake sensor 10
Send operation check commands to a to 10c. Then, in S9, when a response is returned from each of the earthquake sensors 10a to 10c, the symbol marks of the earthquake sensors 10a to 10c displayed on the display 2 are switched from "blue" to "red" and can operate normally. Show that. When the earthquake sensors 10a to 10c are inoperable, the symbol marks of the earthquake sensors 10a to 10c remain "blue" and the earthquake sensors 10a to 10c
Indicates that 0c is out of order. As described above, when an abnormality is detected in the earthquake sensors 10a to 10c, the earthquake sensors 10a to 10c are stopped together with the above display, and power is not supplied until the repair is completed, thereby preventing malfunction. When the process in S9 is completed, the process returns to S1.

When the sensor inspection mode is set as described above, the control device 1 sequentially checks for abnormalities of various sensors, and the result is displayed on the display 2, so that the operator can change the color of the symbol mark displayed on the display 2. Thus, the status of various sensors can be grasped at a glance. If there is a malfunctioning sensor, it can be repaired immediately so that the safety management of the gas station 5 can be performed normally.

In the above embodiment, the gas station has been described as an example.
The present invention is not limited to this, but can be applied to other facilities.

Needless to say, the type and number of sensors are not limited to those in the above embodiment.

As described above, in the sensor inspection device according to the present invention, the types and installation positions of various sensors are collectively and graphically displayed on the display means, and the presence or absence of abnormality of each sensor is sequentially checked. The presence or absence of abnormality of each sensor can be known at a glance by the display means. Accordingly, each sensor can be easily inspected without activating an alarm device or the like as in the related art, and labor for inspection work can be saved.
Further, even in a facility having many types of sensors, all sensors can be inspected in a short time by the display device, so that there is no omission of inspection and each sensor can always be maintained in an operable state.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an embodiment of a sensor inspection device according to the present invention, FIG. 2 is a plan view of a gas station showing installation patterns of various sensors displayed on a screen of a display device, and FIG. 5 is a flowchart for explaining a process executed by the control device. 1 ... Control device, 2 ... CRT display, 3 ... Keyboard, 4A ... Sensor inspection means, 4B ... Sensor monitoring means, 5 ... Refueling station, 7a-7d ... Refueling device, 8a-8d ... Optical sensors, 9a, 9b: Flame sensors, 10a to 10c: Earthquake sensors, 11: Alarm devices.

Claims (1)

(57) [Claims] 1. A sensor in which a plurality of different objects to be detected are installed, an alarm means for issuing an alarm based on an output of the sensor, and a display for collectively and graphically displaying the types and installation positions of the plurality of sensors. Means for checking the presence or absence of an abnormality in each of the sensors, and displaying the result on the display means for each sensor. apparatus.