JPH07139995A - Portable vibrometer - Google Patents

Abstract

PURPOSE:To obtain a portable vibrometer wherein a sheet for a name plate mounted near a steam trap can be automatically made. CONSTITUTION:A vibration pickup 5, an input part 6 for inputting various conditions of a steam trap 1, a signal processing part 7 for processing a vibration signal picked up by the vibration pickup 5, a memory 15 provided in the signal processing part 7 for storing the various condition input through the input part 6 and measurement values detected with the signal processing part 7, a display 8 for displaying the various conditions and the measurement values stored in the memory 15 and a printing part 9 for printing the various conditions stored in the memory 15 are included. The various conditions input through the input part 6 are automatically printed by the printing part 9, and a printed sheet 16 is stuck to a nameplate 3 attached to inlet side steam piping 2a of the steam trap 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a compressor, a turbine, a pump, various rotary machines such as bearings and gears, and fluid control equipment such as valves and steam traps through which fluid passes. The present invention relates to a portable vibrometer that is used to detect abnormalities and failures by detecting vibrations associated with the operation of mechanical equipment.

At the production site in factories and plants, a large number of mechanical equipments such as various rotary machines and fluid control equipments are installed, and these equipments obtain the maximum production amount with the minimum energy consumption and are the best. In order to maintain production quality, vibration measurements are regularly made by portable vibrometers to check the operating conditions.

[0003]

2. Description of the Related Art A conventional portable vibrometer 21 will be described with reference to FIG. This is a key for inputting the vibration pickup 22 and various conditions such as the number of the mechanical equipment to be measured and the model of the mechanical equipment necessary for judging an abnormality or failure.
An input unit 23 such as a board and a signal processing unit 2 into which the vibration signal detected by the vibration pickup 22 is input as an electric signal.
4, the signal processing unit 24 for storing various conditions input from the input unit 23 and the measured values detected by the signal processing unit 24.
And a display unit 26 for displaying the data stored in the storage unit 25.

A procedure for detecting the vibration associated with the operation of the steam trap 20 using the portable vibrometer 21 will be described below. The measurer goes to the installation location of the steam trap 20 having the steam trap number 1, and first inputs various conditions such as the number of the steam trap, the model, the working pressure, and the pipe size from the input unit 23. The inputted conditions are stored in the storage unit 25 of the signal processing unit 24 and displayed on the display unit 26. Further, these conditions are separately handwritten on a sheet 27 and attached to a name plate 29 attached to the inlet pipe 28 of the steam trap 20 or the like. Next, the vibration pickup 22 is pressed against the steam trap 20 to measure the vibration. The vibration signal of the steam trap 20 detected by the vibration pickup 22 is input to the signal processing unit 24 as an electric signal,
The processed measurement value is stored in the storage unit 25 of the signal processing unit 24 and displayed on the display unit 26. The above procedure is sequentially performed for other steam traps to be measured, and the measurement is completed. After the measurement is completed, the operating state is judged by printing out the data stored in the storage unit 25 or transmitting it to the host computer.

The input of the model and the working pressure is convenient when judging whether the operation is good or not if they are output together with the measured value by displaying or printing out, and the signal processing section or the host computer judges whether the operation is good or bad. This is because it is necessary to automatically perform the above, and the pipe size is convenient for replacement when this is output. Further, the handwriting of these various conditions is to enable the user to enter the various conditions by looking at the nameplate at the next measurement.

[0006]

SUMMARY OF THE INVENTION In the above-mentioned conventional apparatus, not only the work of inputting various conditions of the mechanical equipment is required when measuring the mechanical equipment with a portable vibrometer, but also the same contents for making a nameplate. Since it is also necessary to manually write the various conditions of the sheet on the sheet, there is a problem that the measurement work becomes complicated. There was also the risk of making handwriting mistakes.

Therefore, a technical object of the present invention is to obtain a portable vibrometer which enables simple and accurate measurement without the need for handwriting of various conditions of mechanical equipment to be measured.

[0008]

Means for Solving the Problems The technical means of the present invention taken to solve the above technical problems are a vibration pickup, an input section for inputting various conditions of a machine under test, and a vibration pickup. A signal processing unit that processes the detected vibration signal, a storage unit that stores various conditions from the input unit and measurement values detected by the signal processing unit, and a display unit that displays the various conditions and measurement values stored in the storage unit. And a printing unit for printing the various conditions stored in the storage unit.

[0009]

The operation of the above technical means is as follows.
Various conditions such as the number, model, working pressure, and pipe size of the measured mechanical equipment input from the input unit are stored in the storage unit, displayed together with the measured value on the display unit, and printed by the printing unit. Therefore, even if the conditions for the nameplate sheet are not handwritten, the sheet printed by the printing unit can be used for the nameplate.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment showing a concrete example of the above technical means will be described by taking vibration measurement of a steam trap as an example (see FIG. 1). The steam trap 1 is attached to a steam pipe (inlet steam pipe 2a, outlet steam pipe 2b). A name plate 3 is attached to the inlet-side steam pipe 2a. A portable vibrometer 4 for detecting vibrations associated with the operation of the steam trap 1 includes a vibration pickup 5 for converting mechanical vibrations associated with the operation of the steam trap into an electric signal by using a piezoelectric element, an input section 6, and the like. , Signal processing unit 7 and display unit 8
And a measuring unit 10 having a printing unit 9 and a cable 11 connecting them. The signal processing unit 7 includes an amplification unit 12, an A / D conversion unit 13, a determination unit 14, and a storage unit 15.

The input section 6 is for inputting various conditions such as a number of a steam trap, a model, a working pressure, a pipe size, etc. by a key board. The input various conditions are stored in the storage unit 15 of the signal processing unit 7. Further, the storage unit 15 stores in advance judgment criteria based on the type of the steam trap and the working pressure.

In the signal processing unit 7, the electric signal detected by the vibration pickup 5 is amplified by the amplification unit 12, digitally converted by the A / D conversion unit 13, and stored by the judgment unit 14 with the digitally converted electric signal. Based on the model and the working pressure stored in the unit 15, the quality of the operation is determined based on the determination standard stored in the storage unit 15 in advance, and the determination result is stored in the storage unit 15. The display unit 8 displays various conditions and determination results stored in the storage unit 15 of the signal processing unit 7, and the printing unit 9 prints various conditions stored in the storage unit 15 of the signal processing unit 7. It is a thing.

The measurement procedure will be described below. The measurer goes to the installation location of the steam trap 1 of the steam trap number 1, and first inputs various conditions such as the number of the steam trap, the model, the working pressure, and the pipe size from the input unit 6. The input various conditions are stored in the storage unit 15 of the signal processing unit 7, displayed on the display unit 8 and printed by the printing unit 9. The sheet 16 on which various conditions are printed by the printing unit 9 is attached to the nameplate 3. Next, the vibration pickup 5 is pressed against the steam trap 1 to measure the vibration. The vibration signal of the steam trap 1 detected by the vibration pickup 5 is input to the signal processing unit 7 as an electric signal, amplified by the amplification unit 12, digitally converted by the A / D conversion unit 13, and then determined by the determination unit 1.
The quality of the operation is determined in 4, and the determination value is stored in the storage unit 15 as a measured value. The measured value stored in the storage unit 15 is displayed on the display unit 8. The above procedure is sequentially performed for other steam traps to be measured, and the measurement is completed. After the measurement is completed, the operating state is judged by printing out the data stored in the storage unit 15 or transmitting it to the host computer.

[0014]

The present invention produces the following unique effects. As described above, according to the present invention, since the conditions input from the input unit are printed by the printing unit, it is not necessary to separately write the conditions for the nameplate, and the measurement is simple and accurate.

[Brief description of drawings]

FIG. 1 is a schematic view of a portable vibrometer according to an embodiment of the present invention.
It is a block diagram which shows the case where a mutrap is measured.

FIG. 2 is a configuration diagram showing a case where a steam trap is measured using a conventional portable vibrometer.

[Explanation of symbols]

 1 Steam trap 3 Name plate 4 Portable vibrometer 5 Vibration pickup 6 Input section 7 Signal processing section 8 Display section 9 Printing section 15 Storage section 16 sheet

Claims (1)

[Claims] 1. A vibration pickup, an input section for inputting various conditions of a machine under test, a signal processing section for processing a vibration signal detected by the vibration pickup, and various conditions from the input section and detection by the signal processing section. A portable device characterized by comprising a storage unit for storing the measured values, a display unit for displaying the various conditions and the measured values stored in the storage unit, and a printing unit for printing the various conditions stored in the storage unit. Vibration meter.