JP2002071445A - Vibration meter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vibration meter where the magnitude of a vibration measurement value relative to an alarm set level can be instantaneously and visually judged by a measurer, and to provide a vibration meter where the relative positions of a vibration alarm set point and the vibration measurement value can be instantaneously and visually confirmed. SOLUTION: A backlight display part 11b of the display part 11 is switched, in display color, to a color different from normal one if a vibration value measured by bringing a contact part 13a of a vibration meter 1 into contact with an object which is to be measured is judged to be higher than the upper limit value of alarm display which is set by an operation button 12a in advance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibrometer for measuring a vibration of an object to be measured, and more particularly, to a vibrometer having an alarm display function.

[0002]

2. Description of the Related Art There are various types of vibrometers. One of them is a detector serving as a sensor for detecting vibration, a display unit for displaying a detection result by the detector, and a memory for storing the detection result. 2. Description of the Related Art A small-sized hand-held vibrometer provided with a storage unit for storing data is known. In such a vibrometer, the measurer brings a part of the detector into contact with the measurement target, thereby measuring the vibration of the measurement target, and displaying the measurement result on the display unit.

[0003]

However, in the conventional digital display vibrometer, the measurer determines whether the measured vibration value is larger or smaller than the alarm set level by measuring the vibration value of the display section. There is a problem that it is necessary to make a judgment by looking at it, and it is difficult to make a judgment while measuring. In particular, when the change in the vibration measurement value is large, it is difficult to make an instantaneous determination.

Further, in a vibrometer of an analog display,
Since the vibration alarm set point was not on the level meter, there was also a problem that it was difficult to know how far the vibration value currently being measured is located with respect to the alarm set point.

SUMMARY OF THE INVENTION In view of the above circumstances, it is an object of the present invention to provide a vibrometer that allows a measurer to visually and instantaneously determine the magnitude of a vibration measurement value with respect to an alarm setting level, and a relative position between the vibration alarm set point and the vibration measurement value. Is to provide a vibrometer that can be visually confirmed instantaneously.

[0006]

In order to solve the above-mentioned problems, the invention according to claim 1 comprises a vibration measuring means (for example, a detector 13 or the like) for measuring a vibration of an object to be measured, and the vibration measuring means. In a portable vibrometer 1 having a display unit 11 for displaying the measured vibration measurement value, an alarm display condition setting means (for example, the operation unit 12 or the like) for setting a predetermined condition regarding a vibration value to be displayed as an alarm ), When the vibration measurement value measured by the vibration measuring means becomes a predetermined condition for displaying an alarm set by the alarm display condition setting means, an alarm display in a mode different from a normal mode is displayed on the display unit. Alarm display control means (for example, the judgment circuit 1
7, display control circuit 18 and the like).

According to the first aspect of the present invention, when the vibration measurement value becomes the predetermined condition for displaying the alarm set by the alarm display condition setting means, the alarm display control means normally displays the information on the display unit. For example, when an alarm display upper limit is set as the alarm display condition, the measurer does not always watch the vibration measurement value, and the magnitude of the vibration measurement value with respect to the alarm display upper limit is not monitored. Can be visually judged instantaneously. Therefore, even when a test is performed on an object whose vibration is larger than that of a conventional vibration meter, it is possible to further prevent the user from overlooking that the vibration measurement value has exceeded the alarm display upper limit value.

Here, the predetermined condition relating to the vibration value to be displayed as an alarm is, for example, an upper limit value of a permissible range of the vibration with respect to the test object or a set value for judging an abnormality in the vibration test. It may be set arbitrarily for each test object. The alarm display in a mode different from the normal mode may be, for example, a white display in a normal state, and when a predetermined condition is satisfied, the display may be switched to another color (for example, red),
Further, when a predetermined condition is met, a blinking display may be performed. Any mode may be used as long as the measurer can visually recognize that the vibration measurement value has reached the predetermined condition. In addition, a method of displaying an alarm is, for example, a liquid crystal display, but any other display method such as a display using a light bulb may be used as long as it is visually recognizable.

According to a second aspect of the present invention, in the vibration meter according to the first aspect, the display unit includes a liquid crystal display unit (for example, a backlight display unit 11b), and the alarm display control unit includes: It is characterized in that an alarm display is performed by changing the display color of the liquid crystal display unit to a color different from a normal color.

[0010] According to the vibration meter of the second aspect of the invention, particularly, the alarm display is performed by changing the display color of the liquid crystal display unit to a color different from the normal color. Alarm indication can be visually recognized instantaneously.

The invention according to claim 3 is, for example, shown in FIGS.
As shown in (1), a portable type including a vibration measuring means (for example, a detector 23 or the like) for measuring the vibration of the measurement object, and a display unit 21 for displaying the vibration measurement value measured by the vibration measuring means. In the vibrometer 2, the alarm display value setting means (for example, the operation unit 22) for setting a vibration value or a vibration range to be alarm-displayed, and the vibration value or the vibration range set by the alarm display value setting means, Alarm display value display control means (for example, a display control circuit 25 or the like) for performing control to display the vibration measurement value on the display unit, and the display unit displays a vibration level display unit (for example,
An analog display section 21c) and an alarm display section 21a for displaying a vibration value or a vibration range set by the alarm display value setting section at a position where correspondence between the scale and the scale of the vibration level display section can be understood. It is characterized by.

According to the third aspect of the present invention, the vibration value or the vibration range set by the alarm display value setting means is displayed on the alarm display at a position where the correspondence with the scale of the vibration level display is known. The relationship between the displayed vibration value or vibration range and the vibration measurement value during vibration measurement can be instantaneously grasped, and the measurer can use the vibration measurement values to correspond to the vibration value or vibration range one by one. You do not need to think. Therefore, even when a test is performed on an object whose vibration is larger than that of a conventional vibrometer, it can be more easily grasped whether or not the measured vibration value is within the set vibration range. Here, the vibration level display unit may be an analog display using a needle or the like, or a digital display that displays a level by increasing or decreasing the number of blinking liquid crystals.

According to a fourth aspect of the present invention, in the vibration meter according to the third aspect, the alarm display section includes a liquid crystal display section, and the alarm display value display control section is controlled by the alarm display value setting section. The set vibration value or vibration range is displayed on the liquid crystal display unit in a liquid crystal mode.

According to the vibration meter of the present invention, the vibration value or the vibration range set by the alarm display value setting means is displayed on the liquid crystal display section of the alarm display section.
With this liquid crystal display, the correspondence with the vibration measurement value during vibration measurement can be instantaneously grasped.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a schematic front view of a vibration meter 1 according to a first embodiment of the present invention. FIG. 2 is a block diagram for explaining the outline of the configuration of the vibrometer 1.

First, the configuration of the vibrometer 1 will be described. The vibration meter 1 includes a signal processing unit 10 (see FIG. 2) in a case 19, as shown in FIG.

The display unit 11 is provided on the front of the case 19.
And an operation unit 12, and a detector 13 for detecting vibration is provided at an upper end of the case 19.

The case 19 is made of, for example, resin, and has a front portion having a diameter larger than that of a rear portion, thereby improving ease of holding.

The display section 11 is, for example, a liquid crystal display, and has a front display section 11a for displaying real-time measurement values when vibration is measured, various data calculated by a storage section 16 to be described later, and a front display section 11a. A backlight display section 11b located on the rear surface and capable of switching color display.

The operation unit 12 is provided with operation buttons 12a which can be pressed by a finger while holding the vibrometer 1 with one hand.

By pressing the operation buttons 12a, a measurement start signal for starting vibration measurement, a measurement end signal for ending vibration measurement, and a measurement result are stored in the storage unit 16. And the like, and the input signals are output to the signal processing unit 10. The alarm display upper limit value or the alarm display lower limit value for displaying an alarm at the time of vibration measurement can be set by the operation buttons 12a... The setting signal is also output to the signal processing unit 10 and stored in the storage unit 16. Is done. Specifically, for example, the numerical value displayed on the display unit 11 is increased / decreased by an operation button for increasing / decreasing a numerical value, and when a numerical value to be set is reached, setting is performed by a setting operation button.

The detector 13 has a detector body 13b and a conical contact portion 13a for detecting a vibration analog signal by contacting the object to be measured. The vibration analog signal detected by the contact portion 13a is The signal is output to the signal processing unit 10 via the container body 13b.

As shown in FIG. 2, the signal processing section 10 includes an amplifier 14, an A / D converter 15, a storage section 16, a determination circuit 17, a display control circuit 18, and the like.

The amplifier 14 amplifies the vibration analog signal output from the detector body 13b, and outputs the amplified vibration analog signal to the A / D converter 15.

The A / D converter 15 receives the vibration analog signal amplified by the amplifier 14 and converts it into a digital signal, and outputs this vibration digital signal to the determination circuit 17.

The storage unit 16 stores an alarm set level set by the operation unit 12, a measurement result, and the like.

The determination circuit 17 compares the vibration digital signal output from the A / D converter 15 with the alarm set level signal stored in the storage unit to determine the magnitude of the vibration measurement value with respect to the alarm set level. The determination is made and the result of the determination is output to the display control circuit 18.

The display control circuit 18 controls the backlight display section 11b of the display section 11 based on the determination result of the determination circuit 17.
Color display switching control.

Next, the operation of the vibrometer 1 according to the present embodiment will be described. First, the contact part 13a of the detector 13 is brought into contact with the object to be measured, and the measurement start signal is input by pressing the operation button 12a of the operation part 12, thereby starting the measurement of the vibration. In this state, the vibration analog signal detected by the contact unit 5 is output to the signal processing unit 10 via the detector main body 13b. In the signal processing unit 10, the vibration analog signal is amplified by the amplifier 14 and then converted into a digital signal by the A / D converter 15.

Next, the alarm set level stored in the storage section 16 is read out, and the judgment circuit 17 compares the digital signal with a signal indicating the alarm set level,
It is determined whether the vibration measurement value is larger than the alarm display upper limit value.

When the determination circuit 17 determines that the measured vibration value is larger than the alarm display upper limit value, the display control circuit 18 changes the backlight display portion 11b of the display portion 11 to a color different from the normal color (for example, , From white to red), and if the vibration measurement value is smaller than the alarm display upper limit, the backlight display section 11b is displayed on the display section 11 in a normal color (for example, white).

When the vibration measurement is completed, the contact portion 13a of the detector 13 is separated from the object to be measured, and the operation unit 1
By pressing the second operation button 12a, a measurement end signal is input.

As described above, according to the vibrometer 1 of one embodiment of the present invention, even if the change of the vibration measurement value is large, the determination circuit 17 makes the vibration measurement value larger than the alarm display upper limit value. Can be determined by the color of the backlight display section 11b of the display section 11, and it can be visually confirmed instantaneously even in a dark place or a place where the numbers on the display section 11 are difficult to see.

[Second Embodiment] FIG. 3 is a schematic front view of a vibration meter 2 to which the present invention is applied. FIG. 4 is a block diagram for explaining the outline of the configuration of the vibrometer 2.

The vibrometer 2 includes an analog display control unit 26 and an alarm set value control unit 20 in a case 29, as shown in FIGS. The display unit 21 and the operation unit 22 are provided on the front surface of the case 29.
9 is provided at its upper end with a detector 23 for detecting vibration.

The display unit 21 is provided with an alarm display unit 21a composed of, for example, a liquid crystal display, and displays an alarm set value (left: lower limit value, right: upper limit value), various data stored in the storage unit 24, and the like. Can be displayed. During the vibration measurement, the alarm set point is blinked on the vibration level meter.

The display unit 21 is also provided with an analog display unit 21c for displaying, in an analog manner, a real-time measurement value obtained when the vibration is measured by the hand 21b.

The operation unit 22 is provided with operation buttons 22a... As in the first embodiment, and the operation buttons 22a.
By pressing, the alarm display upper limit value or the alarm display lower limit value at the time of vibration measurement can be set, and the setting signal is stored in the storage unit 24 of the alarm display control unit 20.

Specifically, for example, the numerical value displayed on the display unit 21 is increased or decreased by an operation button for increasing or decreasing the numerical value, and when the numerical value to be set is reached, the value is set by the setting operation button.

As in the first embodiment, the detector 23 has a detector main body 23b and a conical contact portion 23a for detecting a vibration analog signal by contacting the object to be measured. Is output to the analog display control unit 26.

The alarm display control unit 20 includes a storage unit 24, a display control circuit 25, and the like, as shown in FIG.

The storage unit 24 stores an alarm display upper limit value, an alarm display lower limit value, a measurement result, and the like set by the operation unit 22.

The display control circuit 25 performs a control for blinking a portion of the alarm display unit located at the alarm display upper limit value or the alarm display lower limit value stored in the storage unit 24.

The analog display control unit 26 amplifies the vibration analog signal detected by the detector 23 and
The control to move the hand according to the strength of the amplified signal is performed on the analog display section 21c.

Next, the operation of the vibrometer 2 according to the second embodiment of the present invention will be described. First, the contact portion 23a of the detector 23 is brought into contact with the object to be measured, and the measurement start signal is input by pressing the operation button 22a of the operation portion 22 to start measuring the vibration.

Then, based on the alarm display upper limit value and the alarm display lower limit value stored in the storage unit 24, the display control circuit 25 causes a portion corresponding to the alarm display upper limit value and the alarm display lower limit value of the alarm display unit 21a to blink. Is displayed.

In this state, the vibration analog signal detected by the contact portion 23a is output to the analog display control unit 26 via the detector main body 23b. After the vibration analog signal is amplified by the analog display control unit 26, the hand 21b moves to a position corresponding to the strength of the signal to display a vibration value.

When the vibration measurement is completed, the contact portion 23a of the detector 23 is separated from the object to be measured, and the operation unit 2
By pressing the second operation button 22a, a measurement end signal is input.

As described above, according to the vibrometer 2 of the second embodiment of the present invention, the position of the analog hand is compared with the alarm display upper limit value or the alarm display lower limit value while measuring the vibration. You can instantly visually check how far it is.

The present invention is not limited to the present embodiment, and can be arbitrarily modified without departing from the gist.
For example, in the first embodiment, the same effect can be obtained by switching the color of characters on the front display unit 11a instead of switching the color display of the backlight display unit 11b of the display unit 11.

[0052]

According to the first aspect of the present invention, the magnitude of the vibration measurement value with respect to the alarm display upper limit value can be visually and instantaneously determined by the alarm display condition setting means and the alarm display control means.

According to the second aspect of the present invention, the magnitude of the vibration measurement value with respect to the alarm display upper limit can be visually and instantaneously confirmed by the liquid crystal display unit and the alarm display control means.

According to the third aspect of the present invention, the alarm display value setting means, the alarm display value display control means, the vibration level display section and the alarm display section allow the vibration measurement value to correspond to the alarm display upper limit value or the alarm display lower limit value. The position can be visually confirmed instantaneously.

According to the present invention, the position of the vibration measurement value with respect to the alarm display upper limit value and the alarm display lower limit value can be visually and instantly confirmed by the liquid crystal display unit and the alarm display value display control means.

[Brief description of the drawings]

FIG. 1 is a schematic front view of a vibration meter 1 according to an embodiment of the present invention.

FIG. 2 shows a vibration meter 1 according to an embodiment of the present invention.
FIG. 2 is a block diagram showing a configuration of a main part of FIG.

FIG. 3 is a schematic front view of a vibration meter 2 according to an embodiment of the present invention.

FIG. 4 is a vibration meter 2 according to an embodiment to which the present invention is applied.
FIG. 2 is a block diagram showing a configuration of a main part of FIG.

[Explanation of symbols]

 1, 2 Vibrometer 10 Signal processing unit 11, 21 Display unit 11a Front display unit 11b Backlight display unit 21a Alarm display unit 21b Needle 21c Analog display unit 12, 22, Operation unit 12a, 22a Operation buttons 13, 23 Detector 13a, 23a contact part 13b, 23b detector main body part 16, 24 storage part 17 judgment circuit 18, 25 display control circuit 20 alarm set value control part 26 analog display control part

Claims (4)

[Claims] 1. A portable vibrometer having a vibration measuring means for measuring the vibration of an object to be measured and a display for displaying a vibration measurement value measured by the vibration measuring means, an alarm should be displayed. Alarm display condition setting means for setting a predetermined condition relating to a vibration value; and a case where the vibration measurement value measured by the vibration measurement means is a predetermined condition for displaying an alarm set by the alarm display condition setting means. And a warning display control means for performing a warning display in a mode different from a normal mode on the display unit. 2. The vibrometer according to claim 1, wherein the display unit includes a liquid crystal display unit, and the alarm display control unit changes the display color of the liquid crystal display unit to a color different from a normal color to generate an alarm. A vibrometer characterized by being configured to display. 3. A portable vibrometer having a vibration measuring means for measuring vibration of an object to be measured and a display for displaying a vibration measurement value measured by the vibration measuring means, an alarm should be displayed. Alarm display value setting means for setting a vibration value or a vibration range; and alarm display value display control means for performing control for displaying the vibration value or the vibration range set by the alarm display value setting means on the display unit. The display unit includes a vibration level display unit that displays the level of the vibration measurement value, and a vibration value or a vibration range set by the alarm display value setting unit at a position where the correspondence between the vibration level display unit and the scale is known. A vibrometer, comprising: an alarm display unit for displaying. 4. The vibrometer according to claim 3, wherein the alarm display unit includes a liquid crystal display unit, and the alarm display value display control unit controls the vibration value or the vibration range set by the alarm display value setting unit. A liquid crystal display on the liquid crystal display section.