JP2591801Y2 - Portable vibration display - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable vibration display.

[0002]

2. Description of the Related Art Vibrating machines, such as vibrating conveyors, vibrating feeders or vibrating parts feeders, are currently widely used in the industrial world. For example, in a car manufacturing plant, a number of vibration feeders and vibration part feeders are provided side by side, and workers periodically measure the amplitude and frequency of the vibrating section to determine whether these vibrators are operating normally. The maintenance is carried out to correct or repair the structure of the drive unit if it is not within the normal range.

However, in order to detect the amplitude of vibration of these vibrators, a so-called amplitude nameplate 1 as shown in FIG. 11 is currently used. This is made of a rectangular mount 2, on which graduation lines 3 are printed in parallel at a constant pitch. V-shaped display lines 4a, 4b intersecting these
Is printed. A film for protecting the adhesive film is attached to the back side of the backing paper 2 of the nameplate 1. The film is peeled off and attached to the vibration surface of the vibrator V whose amplitude is to be measured as shown in the figure. As shown in FIG. 12, the amplitude display lines 4a, 4b
Are strips P and Q having a width proportional to the amplitude as an afterimage. As a result, the tip of the overlapped portion 5 of these bands becomes the scale line 3
The amplitude of the vibrator V is visually detected depending on the position of the vibrator V. However, in order to accurately measure the amplitude, it is necessary to attach the scale line 3 in parallel with the vibration direction a of the vibrator V as shown in FIG. Even if it is worn, there is a reading error by each worker. Further, even if the same worker is used, a reading error occurs due to the brightness or the like at that time. This error varies depending on the operator, but may be about ± 10%.

As for the vibration frequency, a vibrating frequency meter having a large number of leads arranged thereon is applied to a part of the vibrator. At this time, the lead resonating with the vibration is observed, and the vibrating frequency is displayed by the frequency corresponding to the lead. Although the vibration frequency is read, it is not very accurate, depending on the number of leads.Also, not only one lead resonates and swings greatly, but the leads before and after it are slightly smaller. May swing in a moderate size. At this time, the vibration frequency is calculated based on the ratio of these vibration magnitudes, but the personal error is large.

In view of the above-mentioned problems, the applicant of the present invention has a vibration display device capable of accurately and accurately detecting the amplitude and frequency of a large number of vibrators in a short time and performing maintenance easily and reliably. For the purpose of providing at least a microcomputer, a battery, and a display element connected to an output terminal of the microcomputer, the output of the display element is received on a front panel portion of a casing, and at least the amplitude and / or A main body provided with a display unit for digitally displaying the vibration frequency, a vibration detector detachable from a part of the vibrating body to be measured, and a detection force of the vibration detector are derived and connected to a connector section of the main body. And a vibration frequency and / or vibration frequency of the vibrating body as a calculation result of the microcomputer from a detection force of the vibration detector attached to a part of the vibrating body to be measured. Portable vibration indicator is characterized in that so as to be displayed on the display unit in a digital value, proposed (Jitsugantaira No. 2-59283).

However, in the above portable vibration display,
The battery is built-in. For example, an AA battery is used, and when the display is used, a power switch is turned on, and a microcomputer and a driving device of the display unit built in the casing are used. Supply DC power to
As is well known, the life of a battery is limited, and the power supply voltage of the battery may decrease during use, making the battery unusable. In such a case, the battery may be replaced, but if there is no battery to be replaced nearby, the vibration measurement by the display must be stopped for a considerable time.
In other models, for example, in a tape recorder, when the battery power supply voltage is so low that recording becomes impossible, the lamp is turned on or extinguished in the recording mode to inform the operator that the battery should be replaced. When continuously measuring the frequency and frequency of this vibrating body for a large number of vibrating machines at a factory, even if it has a sufficiently high power supply voltage at first and can be used, it cannot be used during use. Voltage.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides a portable vibration display capable of recognizing in advance that the power supply voltage of a battery drops to an unusable state in any use state. The purpose is to do.

[0008]

The object of the present invention is to receive the output of the display element on a front panel of a casing containing at least a microcomputer, a battery, and a display element connected to an output terminal of the microcomputer. A body provided with a display unit for digitally displaying at least the amplitude and / or vibration frequency, a vibration detector detachable to a part of a vibration conveyor or a vibration feeder , and a detection force of the vibration detector, The vibration conveyor or the vibration feeder as a calculation result of the microcomputer from the detection force of the vibration detector attached to a part of the vibration conveyor or the vibration feeder. A portable vibration display device in which the amplitude and / or vibration frequency of the portable vibration display is displayed as a digital value on the display unit. Upon displaying the voltage digital value bets
In particular, a graph showing the relationship between the battery voltage and the operating time
Affixed to the rear panel of the casing or the display unit
The portable vibration display is characterized in that it is displayed on a part of the portable vibration display.

[0009]

The power supply voltage of the battery at that time is displayed as a digital value on the display unit. Therefore, if the user of the display unit knows in advance the voltage at which the battery cannot be used for the display unit, It is possible to know to what extent it is not possible and refer to the graph showing the voltage-time characteristics .
Thereby, it is possible to recognize how many hours can be used from the voltage read by the display unit. Therefore, the use of the display can be effectively performed. Further, when a separate switch is provided for displaying the voltage on the display unit, the battery is not consumed at all times for this purpose, so that the life of the battery is not shortened unnecessarily.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a portable vibration display according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 to FIG. 4 are front views of the portable vibration display device of the present embodiment. In the drawings, the portable vibration display device is indicated as a whole by reference numeral 10 and has a substantially rectangular casing 11. This has a built-in microcomputer 45, a liquid crystal display driving device 47, and a battery 70 as shown in FIG. 6, and the battery 70 is stably supported in the casing 11 via the holder 18. Although not shown, the microcomputer 45 and the above-described liquid crystal display driving device 47 are mounted on a chassis, and the chassis is held at a predetermined position on the casing 11 by mounting screws 15. A power switch 17 is provided on the left wall of the casing 11 and is a known forward switch. When the switch is pressed to the "on" side, the battery supplies power to each part, and the power switch 17 is turned to the "off" side. Pressing it shuts off the power. A lamp 20 that is turned on when the power switch 17 is turned on is provided on the front panel unit, and when it is on, it indicates that the power of the built-in battery 70 is being supplied to each unit.
The liquid crystal display unit 21 is provided on the lower side, which consists of a Fuhaba display unit 22a and the vibration frequency display unit 22b arranged in the lateral direction in the embodiment, it is driven by a liquid crystal display driving device 47 described above Then, as will be described later, the microcomputer detects the detection force from the vibration detector, and the resulting digital value is driven by the driver output as the output of the microcomputer to drive the liquid crystal display driving device 47. , 22b, the amplitude and the vibration frequency are displayed as digital values, for example, as shown in the figure. Above the amplitude display area 22a, the unit of the amplitude is displayed outside the liquid crystal unit (mm).
Is engraved, and the vibration frequency is displayed as a digital value on the vibration frequency display section 22b. Above this, in the vibration frequency display section 22b, according to the present embodiment, the unit is VPM or Hz. Since they are displayed, they are selectively displayed.

A hold button 2 is provided below the display section 21.
8 and a trigger button 31 are provided. When the hold button 28 is pressed, the amplitude value and the frequency during continuous operation are displayed on the display unit 21 in a hold manner. Normally, the frequency and amplitude during continuous operation at a low sampling rate are displayed every moment. When the trigger button 31 is pressed after the hold button 28 is pressed, the mode is switched to high frequency sampling. When the operation is stopped, the driving force to the vibrator is cut off, but the vibration up to the stop causes resonance free vibration, so this frequency is detected by a vibration detector as described later, and calculated by a microcomputer. This frequency is displayed as a digital value on the vibration frequency display section 22b. Therefore, the resonance frequency of the vibration conveyor or the vibration feeder can be detected. Furthermore Battery Voltage display switch 32 is in the lower portion of the front panel portion 12 is provided. When this button is pressed, the voltage of the battery can be displayed on the amplitude display section 22a instead of the amplitude of the vibration object to be measured, as shown in FIG. Therefore, in this embodiment,
Is provided on the rear panel of the casing 11 in FIG.
Is a graph showing the relationship between the voltage of the battery 70 and the use time.
Is pasted, and the operator can refer to this
Hours remaining from battery voltage indicated by
To be able to recognize
ing.

As shown in FIG. 4, trimmer resistance adjusters 35 and 36 are further provided on the side wall of the casing 11.
One 36 is for adjusting the amplitude of the feeder and the other 35 is for adjusting the amplitude of the conveyor. Thereby, the analog input of the A / D converter in the circuit diagram of FIG. 6 is also manually adjusted.

Next, an electric circuit built in the portable vibration display 10 will be described with reference to FIG. In FIG. 6, the vibration detector 40 has a shape as shown in FIG. 8, and as will be described later, this detection force is supplied to a low-pass filter 41, where a high-cycle signal component such as noise is generated. Is removed and the output is supplied to the amplifier 42. The amplified output is supplied to the A / D converter 43 to convert an analog value into a digital value, and this digital value is supplied to the microcomputer 45. Microcomputer 45
A switch section 46 is further connected to the input terminal side of the switch, which collectively shows various switches 28, 31, 32, etc. shown in FIG. It is supposed to be. The microcomputer 45 receives the switch signal of the digital output and the switch unit 46 from the A / D converter 43 performs a predetermined operation, the liquid crystal display driving instrumentation the result of the calculation
It is supplied to the device 47. This includes a driving circuit or a liquid crystal unit as the display unit 21 as shown in FIG. The output terminal of the microcomputer 45 further has an output terminal d for performing personal computer communication.
This sends a signal to the personal computer 48.
The automatic voltage regulator 49 is indicated by a broken line in FIG. 6, and the adjusting unit of the automatic voltage regulator is automatically driven by the detection force of the vibration detector at this time to automatically obtain a desired amplitude and frequency. It can be adjusted. When the microcomputer 45 presses the hold button 28 in FIG. 1, the microcomputer 45 has a holding circuit for holding the amplitude and frequency values at that time. When the trigger button 31 is pressed, the amplitude and frequency are measured by high-speed sampling. Like that. Normally, low-speed sampling is performed.
The second is 0.2 seconds in high-speed sampling.

Next, the details of the vibration detector 40 will be described with reference to FIG. This is an almost cylindrical casing 5
Has a 0, a force detecting element 51 made in the internal example zirconate lead is held on the mounting plate 52. The flange portion of the casing 50 is fixed to the mounting plate 52 by, for example, screwing. Also force detection element 5
In FIG. 1, the detected force is derived by a lead wire 53. A vibration display line 55 is engraved on the upper surface of the casing 50. This is stamped so as to be parallel to and in the same direction as the force detection direction F of the force detection element 51 incorporated in the casing 50. It is also assumed that a flat magnet is mounted on the back surface of the mounting plate 52. Therefore, the whole vibration detector 40 can be easily attached to and detached from the vibrating body by the magnet.

In FIG. 6, the microcomputer 45 is connected to a terminal of a trimmer resistance device 44 composed of trimmer resistance adjusters 35 and 36 shown in FIG. 4, thereby performing manual adjustment of the analog input in the A / D converter 43. ing. The microcomputer 45 receives the digital output of the A / D converter 43 in the gain control section 42a of the amplifier 42. A gain control signal for changing the gain of the amplifier 42 in order to use a fixed number of bits effectively is provided. I am going to receive it. The magnitude of this gain control signal depends on the trimmer resistance adjusters 35, 3
6 can also be adjusted by manual adjustment.

According to the present invention, the green backlight 6 is provided inside the casing 11 behind the liquid crystal display unit 21.
1 is provided, which is illuminated only when a backlight switch 60 arranged next to the power switch 17 is pressed. That is, the power of the battery 70 is supplied to the backlight 61. When not pressed, the battery 70 is shut off.

A portable vibration display 1 according to an embodiment of the present invention.
0 is configured as described above. Next, this operation will be described.

FIG. 8 shows the vibration detector 40 according to the present embodiment. Next, an operation of attaching the vibration detector 40 to the vibrator will be described. In this embodiment, the vibration of the vibration feeder 60 as shown in FIG. 7 is measured. As is well known, the vibration feeder 60 includes a trough 61 having a U-shaped cross section and a drive unit 62 for transmitting a vibration force to the trough 61. The drive unit 62 is configured by a leaf spring, an electromagnet, or the like. The entire vibration feeder 60 is suspended from a part of the building by the coil springs 63a and 63b. When a commercial power supply is applied to the coil of the electromagnet of the drive unit 62, the coil vibrates at 50 Hz, for example, at about 2 mm in the direction indicated by the arrow m. When the mounting plate 52 of the vibration detector 40 shown in FIG. 8 is applied to the side surface of the trough 61, the trough 61 can be easily mounted by the magnet mounted on the back surface thereof.
It is fixed to the side of. Vibration detector 4 with trough 61
Although the vibration also occurs at 0, a vibration display line 55 is engraved on the upper surface of the casing 50. In the first mounting, the mounting is performed so as to be parallel to the expected vibration direction m. However, if the vibration display line 55 is sufficiently thin and exactly coincides with the vibration direction, the thickness of the vibration display line 55 is substantially the same as the thickness of the line at rest. However, if it is tilted in any direction, it is left on the retina of the eye as an afterimage, so that it can be seen with a certain width or a tilted width. Therefore, while observing this, the mounting direction is adjusted while the casing 50 is pinched so as to be approximately the thickness of the vibration display line 55 in the stationary state. When the magnet is fixed to the side surface of the trough 61 at a predetermined angle by a magnet, the force detection direction 51 of the force detection element 51 made of lead zirconate in the casing 50 is parallel to and coincides with the direction of the force detection. Can be measured. This vibration detection force, that is, the voltage is supplied to the low-pass filter 41 shown in FIG.

The detected force from the vibration detector 40 is supplied to a low-pass filter 41, which is not an ideal sine waveform as shown by a waveform S but contains a large amount of noise in a ripple shape. As a result, the ripple noise is removed as a high frequency component as shown on the output side, and a signal S ′ of a low frequency component is supplied to the amplifier 42. Here, it is amplified to a predetermined size and A
/ D converter 43. The microcomputer 45 performs an operation according to the characteristics of the feeder. That is, as described above, the vibration feeder 60 vibrates about 2 mm at 50 Hz, for example.
The maximum value is about 5 to 30 g, and the analog input of the A / D converter is determined by this maximum value so as to be a full-scale digital value. Therefore, the amplitude can be accurately detected in accordance with the number of bits. A clock pulse generator is provided in the microcomputer 45 in a known manner. The clock pulse has a predetermined number of pulses and has a high precision which does not fluctuate with time. The output oscillation frequency is detected by low-speed sampling.

The output of the microcomputer 45 is an LCD (Liquid)
d Crystal Display) Liquid Crystal Display 4
7 is supplied. That is, the amplitude and vibration frequency of the vibration feeder 60 calculated by the microcomputer 45 are displayed as digital values on the display unit 21 as shown in FIG. That is, it can be seen that the amplitude of the vibration feeder 60 during the measurement is 1.25 mm and the vibration frequency is 50.25 Hz. Conventionally, the amplitude nameplate 1 as shown in FIGS.
On the side of the scale line 3 so that it matches the vibration direction,
The operator has read this intersection using the residual images of the amplitude display lines 4a and 4b due to the retina of the eyes. However, as described above, there is an individual difference and the intersection varies depending on the surrounding conditions. According to the present embodiment, the amplitude and the vibration frequency are displayed as digital values as shown in FIG. 2, so that the measurement can be performed accurately and unified without any personal error.

In a factory, a large number of vibration feeders as shown in FIG. 7 are usually operated in parallel, and since the maintenance is performed simultaneously, another vibration feeder 60 is similarly operated. Immediately after the mounting of the vibration feeder 40, the amplitude and vibration frequency of the vibration feeder can be accurately detected and read.

The amplifier 42 has a gain control unit 4
2a is provided, which receives the output of the A / D converter 43 supplied to the microcomputer 45, and controls the gain of the amplifier 42 according to this output. In other words, although the number of bits of the A / D converter is constant, the accuracy differs greatly between when the detected acceleration is low and when the detected acceleration is high. The gain is increased. Therefore, the measurement can be performed with the same accuracy regardless of whether the analog input of the gain control unit 42a, that is, the detection force is large or small.

In this embodiment, the amplitude is measured with higher accuracy than the conventional one as follows. That is, as shown in FIG. 9, the output of the vibration detector 40 has a sinusoidal waveform S as a whole but includes noise, and large noises P and P 'are often present for some reason. When the amplitude is calculated by performing the double integration on the appropriate output S, the amplitude is measured from the maximum value and the minimum value by the double integration, so that a large noise P as shown in FIG. , P 'occurs, the measured amplitude is larger than the actual amplitude. With an ideal sine waveform without such noise, accurate measurement can be performed without any problem.
As shown in (1), noise of various sizes is often present, but according to the method of this embodiment, this effect can be eliminated. That is, if the amplitude to be measured is At, the displacement X at each time is X = At sin ωt / 2,
This is differentiated twice [the second derivative of X] = − Atω ²
sin ωt / 2.

In this embodiment, the acceleration mean square R.S. M.
S. (Root Mean Square), that is, calculate the effective value. That is, the acceleration at each moment is integrated over time, divided by the time during this time, and the average value is taken. Therefore, [ the second derivative of X] r. m. s. = A
_t ω ² / (2√2). When this is expressed in g, G
r. m. s. = Atω ² / (2√2 g) (g = 980
0). Therefore, the amplitude At = 2√2Gr.
m. s. g / ω ² .

[0026] so that to calculate the Fuhaba A _t by this i.e. [twice differential value of X] measured at each instant, taking the temporal average value of this. Therefore, even if large noises P and P ′ as shown in FIG. 9 are generated in a short time by taking an average value at a certain time, this effect can be almost ignored.

Next, a case where the vibration of the vibration conveyor is measured will be described. This is generally connected by a leaf spring inclined in a predetermined direction between a long trough and a base block disposed in parallel below the trough, and the trough is vibrated in a direction substantially perpendicular to the longitudinal direction of the leaf spring by crank driving. However, the frequency is much lower than the vibration feeder, for example, at 552 VPM . But the amplitude is 12.8mm
However, since the acceleration is proportional to the square of the frequency and proportional to the amplitude, the acceleration is much smaller than that of the vibration feeder. Generally, the acceleration of a vibrating conveyor is about 1 g to 5 g. Therefore, the output detected by the force detection element 51 in the vibration detector 40, that is, the voltage per gram is low. However, according to the present embodiment, even in such a case, the output of the A / D converter 43 can be measured with the same high accuracy as the vibration feeder by controlling the gain of the amplifier 42 . Although not shown, the vibration detector 40 is fixed to the side of the trough of the conveyor in the same manner as in the case of the vibration feeder. Thereby, as shown in FIG. 1, the amplitude of 12.8 mm and the frequency of 552.0 VPM are displayed as digital values. Since the amplitude is the same unit, it is mm, but in the case of a conveyor, it is in VPM, so the display is switched from Hz to VPM in the vibration frequency display section 22b.

Next, a method for measuring the resonance frequency of a vibrator, for example, the vibration feeder 60 will be described. In this case, the hold button 28 shown in FIG. 1 is first pressed, and the amplitude at that time is held in the microcomputer 45. Next, when the trigger button 31 is pressed, the microcomputer 45 is switched to high-speed sampling. In this state, the power supply to the drive unit 62 of the vibration feeder 60 is cut off. When the amplitude held by the microcomputer 45 is reduced to a predetermined ratio, in this embodiment to 80%, the frequency during a predetermined time from this point is measured.
Accordingly, the resonance frequency of the vibration feeder 60 is digitally displayed on the vibration frequency display section 22b as 52.5 Hz as shown in FIG.

When the power supply to the drive unit 62 of the vibration feeder 60 is cut off, the displacement of the trough 61 does not become zero immediately from the vibration shown in FIG. 9 but becomes zero through a transient phenomenon as shown in FIG. This is because the amplitude decreases exponentially, but attenuates due to free vibration because the driving force has already been cut off. This free vibration has a resonance frequency as apparent from vibration engineering. Therefore Fuhaba From this point exponentially decreases assuming that the power is turned off by switching off now time t _1. When the time t ₂ Fuhaba is to have dropped to 80%, the number of waves is calculated by the microcomputer 45 during future time T, as compared with the clock pulses built now microcomputer reads this number,
Therefore, the number of waves per unit time, that is, the resonance frequency (same meaning as the resonance frequency) is calculated.
This corresponds to 5 in the vibration frequency display section 22b shown in FIG.
2.5 Hz. Thus, for example, in this type of resonance type vibrator, the weight of the trough and the spring constant of the leaf spring are set so that the resonance frequency is close to the drive frequency in order to obtain a large amplitude with a small drive force. But,
When the resonance frequency detected by this method is largely changed, for example, when driving frequency is 50 Hz, 70 Hz
Alternatively, when a resonance frequency such as 30 Hz is read, it is considered that a trouble has occurred in any part of the vibration feeder 60. For example, a broken portion of the leaf spring, a sliding of a weight adjusting block, or the like can be considered. Also in the measurement of the resonance frequency, the vibration detectors 40 shown in FIG. 8 can be immediately and reliably detected by, for example, sequentially attaching the vibration detectors 40 to a number of vibrators arranged side by side. Much easier than that.

The portable vibration display of the present embodiment normally performs the above-described operations. According to the present embodiment, the following operations are further performed and the effects are exhibited.

According to the present embodiment, the switch 32 for displaying the battery voltage and the switch 6 for supplying the battery power to the backlight for turning on the backlight and for cutting off the power from the battery are provided.
0 is provided. By pressing the battery voltage display switch 32, as shown in FIG. 3, the battery voltage display switch 32 is normally pressed to the amplitude display sound 22a in which the amplitude of the vibrator currently being measured is displayed. Sometimes
The voltage of the battery 70 incorporated in the display 10 is displayed. FIG. 13 shows the relationship between the voltage of the battery and the operating time in one shell, and shows the alkaline battery, the manganese battery, and the nickel cadmium battery, respectively. The battery is held or taken out by opening and closing the battery holder 18 using the present invention. In FIG. 13, for example, an alkaline battery initially shows a voltage of 6 volts or more, but if the use time exceeds about 40 hours (this use time is assumed to be a continuous use time), it becomes inoperable below 4 volts . That is, if the voltage is lower than this, the microcomputer, the analog-digital converter, the amplifier and the like may not operate normally. Similarly, the voltage drops to an inoperable state in about 20 hours for a manganese battery and 11 to 12 hours for a nickel cadmium battery. In general, normal operation cannot be guaranteed for any battery when the voltage is 4 volts or less.

According to the present embodiment, when the battery voltage display switch 32 is pressed, the voltage of the battery 70 at this time is displayed on the amplitude display section 22a, for example, at 5.5 as shown in FIG.
The operator of the display 10 can confirm that the operation is still operable because it is displayed as volts and is 4 volts or more. Further back panel of the graph casing 11 showing the relationship between the voltage and the operating time as shown in FIG. 13
, The operator can recognize how many hours the battery can be used continuously after the voltage of 5.5 volts at this time.
It is very convenient when traveling on a business trip with a telephone. Knowing how long the battery can be used continuously can determine whether a new battery should be prepared. Further, according to the present embodiment, when the voltage becomes 4 volts or less and the operation becomes impossible, the lamp 19 is turned on, and the operator is notified that the battery should be replaced.

Further, according to this embodiment, since the backlight 58 is provided behind the liquid crystal display unit 21, the surroundings of the vibrator to be measured are dark and the digital display value of the display unit 21 is difficult to see. By turning on the switch 57 , the value of the display unit 21 can be read by the backlight 58 . That is, when the operator operates the switch 57 with one hand, for example, the backlight is turned on by pushing with the thumb, and the amplitude display value and the frequency display value on the display unit 21 can be reliably read even when the surroundings are dark. .

Further, according to the present embodiment, the color of the backlight is green, and the contrast with the surroundings is particularly strong so that the eyes can easily recognize the color.

Further , as described above, the use time of the battery is limited to a certain value, and if the backlight is turned on, it consumes 2 to 2.5 times the power of the normal one. Battery life is significantly reduced. According to this embodiment, the power of the battery is supplied to the backlight only when the switch 60 is pressed, so that the life of the battery is not shortened. It should be noted that the illuminance of the backlight decreases when the voltage of the battery becomes 4 volts or less. Also, according to the present embodiment, the lamp 19 is turned on, so that the operator can recognize that the voltage of the battery is 4 volts or less. Therefore, when the battery is replaced, the backlight can be further brightened. Recognize that you can do it.

The embodiments of the present invention have been described above. Of course, the present invention is not limited thereto, and various modifications can be made based on the technical concept of the present invention.

For example, in the above-described embodiment, the vibration detector 40 is configured such that the detection direction of the acceleration detecting element made of lead zirconate and the surface of the mounting member are parallel to each other. Instead of such a vibration detector, it was simply mounted so that it would be parallel to the vibration direction.However, instead of such a vibration detector, a vertical vibration detector widely used in the past, that is, the detection direction of lead zirconate was attached to the mounting member. On the other hand, when detecting the amplitude of the vibrator since it is in the vertical direction, a member for attaching the same is particularly required, but such a conventional vibration detector can also be applied. Alternatively, all other conventionally known vibration detectors are applicable.

In the above embodiment, the portable vibration display 10
The size of is not particularly limited, and is described only as a portable type, but may be a hand-held unit (Handheld) type, that is, a size such that an operator can operate various buttons with one hand. Thereby, maintenance of each vibrator can be further facilitated.

In the above embodiment, the magnet of the mounting portion is used to mount the vibration detector 40 to a part of the vibrator to be measured. However, instead of this, a suction plate using a vacuum action may be used. . This is effective when a part of the vibrator is made of a non-magnetic material.

By pressing the battery voltage display switch 32 or the battery voltage display switch 32, the voltage of the battery at this time, for example, 5.5 volts is digitally displayed on the amplitude display section 22a. The unit may be provided separately from the amplitude display unit 22a and the vibration frequency display unit 22b, and only when the battery voltage display switch 32 is pressed, the battery voltage at this time may be displayed as a digital value. . Alternatively, the battery voltage display switch 32 may be omitted, and the display may always be made here.

When the battery voltage drops and the operation becomes impossible, the lamp 19 is turned on so that the operator can recognize it. However, this lamp 19 is omitted, and the amplitude is displayed on the amplitude display section 22a by blinking, for example, with a backlight. May be recognized.

In the above embodiment, the color of the backlight is green, but it is needless to say that the color of the backlight may be white light or another color such as red or orange. Alternatively, the colors may be changed in the amplitude display section 22a and the vibration frequency display section 22b so that the operator can recognize whether the amplitude is displayed or the frequency is displayed based on the color. .

In the above embodiment, the graph shown in FIG. 13 is attached to the back panel of the portable vibration display 12 , and when the user presses the battery voltage display switch 32 while viewing the graph, the graph is displayed on the amplitude display 22a. Compared to the displayed voltage value so that you can recognize how much more can be used
However, instead of this, the amplitude display section 22 a of the display section 21,
Either the vibration frequency display unit 22b or a separate display unit is provided, and when the battery voltage display switch 32 is pressed, the graph of FIG. 13 is compactly displayed together with the digital display of 5.5 volts of the battery voltage. It may be.

[0044]

[Effects of the Invention] As described above, according to the portable vibration display of the present invention, the voltage of the built-in battery can be displayed at any time by simply pressing the battery voltage display switch without using a tester. Because it can be displayed as a digital value on the unit, or because it is always displayed, the relationship between battery voltage and usage time is shown.
From the graph, you can know how many hours can be used continuously without interruption. Also, at this voltage, it is possible to recognize whether or not this indicator can be used with the battery that is currently built in.

[Brief description of the drawings]

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

FIG. 2 is a similar front view for explaining the operation of the portable vibration display.

FIG. 3 is a similar front view for explaining the operation of the portable vibration display.

FIG. 4 is a right side view of the portable vibration display.

FIG. 5 is a left side view of the same.

FIG. 6 is a block diagram of an electric circuit built in the display.

FIG. 7 is a side view of a vibration feeder as an example of a vibrator measured by the portable vibration display device of the embodiment.

FIG. 8 is a perspective view of a vibration detector in the portable vibration display device.

9 is a detection force waveform of a vibration detector attached to the vibration of the vibrating machine to be measured shown in FIG. 7;

FIG. 10 is a waveform chart showing a transient phenomenon of the output of the detector when the power supply of the drive unit of the vibrator is cut off.

FIG. 11 is a front view of a conventional amplitude plate for reading an amplitude.

FIG. 12 is a side view for explaining the same operation.

FIG. 13 is a graph generally showing the relationship between battery voltage and usage time.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Portable vibration display 22a Amplitude display part 32 Battery voltage display switch 40 Vibration detector 47 Liquid crystal display drive 58 Backlight 70 Battery

Claims (3)

(57) [Scope of request for utility model registration] An output of the display element is received on a front panel portion of a casing including at least a microcomputer, a battery, and a display element connected to an output terminal of the microcomputer.
A main body having a display unit for digitally displaying at least the amplitude and / or the vibration frequency; and a vibration conveyor or a vibration filter.
The vibration conveyor or the vibration filter, comprising: a vibration detector which is detachably attached to a part of the vibration detector; and a conductive cord which derives a detection force of the vibration detector and is connected to a connector of the main body.
The vibration conveyor as the operation result of the microcomputer from the detection Todoroki of the vibration detector attached to a portion of Ida
Alternatively , in a portable vibration display device in which a vibration value and / or a vibration frequency of the vibration feeder is displayed in a digital value on the display unit, the voltage of the battery is displayed in a digital value on the display unit.
Together with the graph showing the relationship between voltage and time of use of the cell case
Affixed to the back panel of the housing or part of the display
A portable vibration display device characterized in that it is displayed on a display. 2. When the voltage of the battery drops to a predetermined value.
And inside the casing behind the display
The portable vibration display according to claim 1, wherein the backlight is turned on and off . (3) A voltage display button was provided and pressed.
Only when the battery voltage is displayed on the display unit.
3. A portable vibration display according to claim 1 or claim 2.
vessel.