JP2003130725A - Diagnostic system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a diagnostic system by which the state of a trap as an object to be diagnosed can be diagnosed in a diagnostic part having a small memory capacity. SOLUTION: An oscillation device 1 by which the control number and the diagnostic reference of the trap 3 as the object to be diagnosed are oscillated is attached to an exit-side pipe 4 in the trap 3 via a rubber band 5. By a diagnostic device 2 in which a vibration detection part 6 and the CPU (the diagnostic part) 16 are built, the control number and the diagnostic reference of the trap 3 oscillated from the oscillation device 1 and a vibration due to the operation of the trap 3 are detected, and the trap 3 is diagnosed on the basis of the detected diagnostic reference of the tarp 3 and on the basis of a detection value of the vibration due to the operation of the trap 3.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to valves such as a pressure reducing valve, a safety valve, an automatic control valve, a check valve, etc., and a steam trap, a gas trap, etc. A diagnostic system that detects and diagnoses vibrations for maintenance and inspection of traps or various plant equipment, and is particularly suitable for diagnosing different types of diagnostic standards, such as steam traps, depending on the type. Related to diagnostic systems. 2. Description of the Related Art At a production site in various plant facilities and factories, many plant facilities and valves such as various rotary machines and driving machines are installed, and these facilities and valves are used for maximum production with minimum energy consumption. In order to obtain the quantity and to maintain the highest production quality, the condition is constantly or periodically checked according to its importance by detecting vibrations. [0003] Conventional diagnostic systems include, for example,
There is one disclosed in Japanese Patent Publication No. Hei 7-11319. The diagnostic system disclosed herein is an oscillation device that is attached to a diagnostic object itself or in the vicinity thereof via a vibration isolation member, and oscillates an identification symbol such as a management number of the diagnostic object and a code number such as an operation principle as a vibration signal. And a vibration detection unit that detects the identification symbol and code number of the diagnostic object oscillated from the oscillation device and detects vibration accompanying the operation of the diagnostic object, and stores all diagnostic criteria for each code number of the diagnostic object. The diagnostic criterion of the diagnostic object is selected from the code number of the diagnostic object detected by the vibration detecting unit, and the diagnostic criterion of the selected diagnostic object and the operation of the diagnostic object detected by the vibration detecting unit are selected. A diagnosis unit that diagnoses the state of the diagnosis target based on the vibration value. [0004] In the conventional diagnostic system, the diagnostic object oscillated from the oscillating device can be used without manually inputting the identification symbol and code number of the diagnostic object to the diagnostic unit separately. The vibration detection unit detects the identification code and code number of the object and the vibration associated with the operation of the diagnosis object, and the diagnosis unit stores all the diagnostic criteria for each code number of the diagnosis object. A diagnostic criterion of the diagnostic object is selected from the code number of the detected diagnostic object, and the diagnostic object is determined based on the diagnostic criterion of the selected diagnostic object and the vibration value associated with the operation of the diagnostic object detected by the vibration detection unit. Can be diagnosed. However, the diagnostic criteria for the diagnostic object are very different since they differ for each code number due to a difference in the structure of the diagnostic object, a difference in the manufacturer, and the like, and there is a problem that a large storage capacity is required for the diagnostic unit. Was. Therefore, a technical problem of the present invention is to provide a diagnosis system that can diagnose the state of a diagnosis target with a diagnosis unit having a small storage capacity. [0005] The technical means of the present invention, which has been taken to solve the above-mentioned technical problems, is attached to a diagnostic object itself or in the vicinity thereof through a vibration isolating member, and is used for diagnosis. An oscillation device that oscillates the control number and the diagnostic reference of the object as a vibration signal, and a vibration detection that detects the control number and the diagnostic reference of the diagnostic object oscillated from the oscillator and detects vibration accompanying the operation of the diagnostic object A diagnostic device comprising: a diagnostic unit for diagnosing the state of the diagnostic object based on a diagnostic criterion of the diagnostic object detected by the vibration detecting unit and a vibration value accompanying operation. A diagnostic system according to the present invention detects a control number of a diagnostic object oscillated from an oscillating device, a diagnostic criterion, and a vibration associated with the operation of the diagnostic object by a vibration detecting unit. The diagnostic unit diagnoses the state of the diagnostic object based on the diagnostic criteria of the diagnostic object detected by the detecting unit and the vibration value accompanying the operation. Therefore, it is not necessary for the diagnostic unit to store all diagnostic criteria for each code number of the diagnostic object. Therefore, the state of the diagnosis target can be diagnosed by the diagnosis unit having a small storage capacity. An embodiment in which the present invention is applied to a trap diagnostic system for diagnosing a steam trap, for example, will be described with reference to FIGS. 1 and 2. FIG. 1 is a schematic configuration diagram of the trap diagnostic system of the present embodiment, and FIG.
FIG. 3 is a block diagram of an oscillation device constituting the embodiment. [0008] The trap diagnosis system of this embodiment comprises an oscillation device 1 and a diagnosis device 2. The oscillating device 1 oscillates the management number and diagnostic reference of the trap 3 to be diagnosed, and is attached to the trap 3 itself or piping before and after the trap 3 via a vibration isolation member. In this embodiment, the trap 3 is attached to the outlet pipe 4 via a rubber band 5.
The oscillating device 1 includes a casing 7 for inserting the tip of the vibration detecting unit 6 of the diagnostic device 2, a piezoelectric element 8 connected to the casing 7, an oscillator 9, and a microswitch 10. The oscillator 9 includes a signal pulse generation circuit 11, a condition setting switch 12, an oscillation circuit 13, and a battery 19. The management number and diagnostic criteria of the trap 3 are, for example, one character is represented by six digits of a binary number, and 1, 0 can oscillate by distinguishing by the length of vibration. The diagnostic device 2 has a vibration detector 6 at its tip for detecting the control number of the trap 3 oscillated from the oscillating device 1, the diagnostic reference, and the vibration accompanying the operation of the trap 3. By inserting the tip of the vibration detection unit 6 into the casing 7 of the oscillation device 1, the micro switch 10 is turned on and oscillation is started. By pressing the tip of the vibration detecting unit 6 against the surface of the housing of the trap 3, vibration accompanying the operation of the trap 3 is detected. The vibration detection signal detected by the vibration detecting section 6 is amplified by an amplifier 14 in the diagnostic device 2 and then digitized by an A / D converter 15 to be converted into a digital signal by a CPU 16 as a diagnostic section.
To enter. The CPU 16 diagnoses the trap 3 based on the inputted diagnostic reference of the trap 3 and the detected vibration value accompanying the operation of the trap 3. The diagnostic result diagnosed by the CPU 16 is stored in the storage unit 17 in the diagnostic device 2 together with the management number of the trap 3 and displayed on the display unit 18. As described above, in the diagnostic system according to the present invention, the control number of the diagnostic object oscillated from the oscillating device, the diagnostic reference, and the vibration accompanying the operation of the diagnostic object are detected by the vibration detecting section. Since the state of the diagnostic object is diagnosed by the diagnostic unit based on the diagnostic reference of the diagnostic object detected by the vibration detecting unit and the vibration value accompanying the operation, the diagnostic device performs all of the diagnostic object code numbers for each code number. There is no need to store the diagnostic reference, and an excellent effect is obtained that the state of the diagnostic object can be diagnosed by a diagnostic device having a small storage capacity.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic configuration diagram of a trap diagnostic system according to an embodiment of the present invention. FIG. 2 is a block diagram of an oscillation device constituting the embodiment. [Description of Signs] 1 Oscillator 2 Diagnostic device 3 Trap 5 Rubber band (Vibration blocking member) 6 Vibration detector 16 CPU (Diagnosis unit)

Claims (1)

Claims 1. An oscillating device which is attached to a diagnostic object itself or in the vicinity thereof via a vibration isolation member and oscillates a management number and a diagnostic reference of the diagnostic object as a vibration signal, and an oscillating device. A vibration detector that detects the control number and diagnostic reference of the diagnostic object to be oscillated and detects the vibration associated with the operation of the diagnostic object, the diagnostic reference of the diagnostic object detected by the vibration detector and the vibration value associated with the operation. And a diagnostic unit for diagnosing the state of the diagnostic object based on the diagnostic device.