JP2001013002A - Oscillation detecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oscillation detecting device capable of setting a threshold value at many times an oscillation value, judging the present operating condition of an object of oscillation measurement, and performing start-up inspections and control on a machine at the site. SOLUTION: This device is provided with a threshold setting part 12 to set a setting value (threshold) of an object of oscillation measurement, a level display part 15 to display the present oscillation value of the object of oscillation measurement, which is the magnitude of a detection signal, and the setting value (threshold), an output part 14 to output the detection signal to the outside to make the present oscillation value and the set value (threshold) measurable, and an output/display switching part 13 to switch between the present oscillation value and the setting value to be displayed on the level display part 15 and to switch between the present oscillation value and the setting value to be outputted to the outside in the output part 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vibration detecting device for detecting and displaying abnormal vibration used for automating failure diagnosis of, for example, a machine tool.

[0002]

2. Description of the Related Art As a conventional vibration detecting device of this kind,
There is an installation type vibration detecting device shown in FIG. In this vibration detection device, a level display section 70 using LEDs for displaying output levels in four stages, a power supply display section 71, and a variable volume 72 for setting a threshold value are provided on the front side.

[0003] The detection signal of the vibration sensor 73 is taken into the controller of the vibration detecting device, passes through the amplifier, and is processed into a signal having an amplitude component suitable for subsequent processing.
The detection signal is displayed on the level display section 70 in one to four stages (first level to fourth level) depending on the magnitude of the detection signal.

[0004]

In the above-described conventional vibration detecting device, the level display section 70 displays the level in one to four stages according to the magnitude of the signal. However, there is a problem that it is difficult to understand how much vibration the vibration measurement object has.

The threshold value is set by, for example, using the variable volume 72 to adjust the threshold value to the current vibration level and, for example, turning the threshold value by about 30 degrees. It cannot be set and used several times, and it is very difficult to set the threshold value to a fixed value. There are problems that the setting of the threshold value is difficult and that it is difficult to use.

Further, it is conceivable to increase the number of LEDs (the number of levels) of the level display section 70, but there is a problem that the current consumption of the LEDs increases.

[0007] The present invention has been made in view of the above-mentioned problems, and an object thereof is to set a set value (threshold) several times the vibration value. Another object of the present invention is to provide a vibration detection device that can determine the current operation state of a vibration measurement target at a site, can perform an inspection at the time of starting a machine, and can easily perform management at the site. .

[0008]

To achieve the above object, a vibration detecting apparatus according to the first aspect of the present invention takes in a detection signal of a vibration sensor, performs signal processing by signal processing means, and converts the detection signal. A setting value setting means for setting a set value of the vibration of the vibration measuring object, and a current value of the vibration measuring object which is the magnitude of the detection signal. Display means for displaying the set value set by the vibration value and the set value setting means, output means for outputting a detection signal to the outside to measure the current vibration value and the set value, and Switching means for switching the display of the vibration value and the set value and switching the output of the current vibration value and the set value to the outside at the output unit is provided.

With this configuration, the current vibration value of the output means is output to the outside, the current vibration value is set to, for example, a voltage (current) value, and the external output of the output means is switched by the switching operation of the switching means. Output the set value (threshold),
This set value (threshold) can be, for example, a voltage (current) value. Also, the current vibration value of the vibration measurement object is read from the display means, and the set value (threshold) can be displayed on the display means by the switching operation of the switching means.

For this reason, the set value (threshold value) can be set while looking at the value of the voltage (current), and can be set while looking at the display on the display means. Can be set finely, and the set value (threshold) can be set to several times the vibration value.

Further, by grasping the current vibration value and the set value (threshold value) as described above, it is possible to judge the current operation state of the vibration measurement object at the site, and Inspections and on-site management becomes easier.

According to a second aspect of the present invention, there is provided a vibration detecting apparatus according to the first aspect of the present invention, wherein the display means has a large number of unit level portions and the detection signal The level display unit displays the current vibration value of the vibration measurement object and the set value of the vibration of the vibration measurement object in the number of levels, which is the number of unit level parts.

With this configuration, the current vibration value of the output means is output to the outside, the current vibration value is set to, for example, a voltage (current) value, and the external output of the output means is switched by the switching operation of the switching means. Output the set value (threshold),
This set value (threshold) can be, for example, a voltage (current) value. For this reason, the set value (threshold) can be set while observing the value of the voltage (current), and the set value (threshold) can be set finely.
It becomes possible to set a set value (threshold) to several times the vibration value.

Further, by grasping the current vibration value and the set value (threshold) as described above, it is possible to judge the current operation state of the vibration measurement object at the site, and Inspections and on-site management becomes easier.

According to a third aspect of the present invention, there is provided a vibration detecting apparatus according to the first aspect of the present invention, wherein the display means is a vibration measuring object whose magnitude is a detection signal. Is a numeral display section for displaying the current vibration value and the set value of the vibration of the vibration measurement object by numbers.

With this configuration, the current vibration value of the vibration measurement object can be read from the numeral on the numeral display unit, and the set value (threshold) can be displayed on the numeral display unit by the switching operation of the switching unit. For this reason, it becomes possible to set this set value finely, and because of the numerical display, the vibration value can be found more finely than the level meter. Also,
Numerical display makes it easy to maintain and manage numerical values of machines and vibrating bodies in TPM.
The D display makes it easy to see even in a dark place.

Further, the current vibration value is measured by the magnitude of the signal displayed on the numeral display section, and the set place (threshold) is displayed on the numeral display section by the switching operation of the switching means. It is possible to judge the current operating state of the vibration measurement object, to perform an inspection at the time of starting the machine, and to facilitate on-site management.

According to a fourth aspect of the present invention, there is provided a vibration detecting apparatus according to the first, second, or third aspect, further comprising a vibration sensor. A substrate mounted with a surface-mounted piezoelectric element that generates a voltage by being vibrated, an impedance conversion circuit that controls the impedance of a detection signal of the piezoelectric element, and an amplification circuit that amplifies the detection signal, and a housing that incorporates the substrate The vibration sensor comprises a body case, and a screw member insertion hole for mounting the vibration sensor to a vibration measurement object with a mounting screw member is provided in the housing case.

With this configuration, not only can the same operation and effect as the above-described first embodiment be obtained, but also when the vibration sensor is attached to the vibration measurement object,
This can be performed by inserting the mounting screw member into the screw member insertion hole and screwing the mounting screw member into the vibration measurement object, without rotating the vibration sensor. Since the cable is not rotated (twisted), the cable is not entangled and the gear is not entangled.

In order to achieve the above object, a vibration detecting apparatus according to a fifth aspect of the present invention captures a detection signal of a vibration sensor, performs signal processing by signal processing means, and converts the detection signal into a signal having a magnitude of A vibration detection device configured to display according to a surface mounted piezoelectric element that generates a voltage by being excited, an impedance conversion circuit that controls the impedance of a detection signal of the piezoelectric element, and a detection signal. A vibration sensor having an amplification circuit mounted on a substrate, a set value setting unit for setting a set value of the vibration of the vibration measurement object, and a current vibration value and a set value of the vibration measurement object which is a magnitude of a detection signal. Display means for displaying the current vibration value and the set value by outputting a detection signal to the outside so that the current vibration value and the set value can be measured; and a table of the current vibration value and the set value on the display means. And a switching means for switching the output of the current vibration value and the set value to the outside in the output means, and the vibration sensor, the set value setting means, the display means, the output means, and the switching means are unitized. is there.

With this configuration, the set value (threshold) can be set finely, the set value (threshold) can be set to several times the vibration value, and the vibration measurement target can be set at the site. The current operating state of the machine can be judged, the machine can be checked at the start of operation, and not only is it easier to manage on site, but it is also low in height, that is, thin,
A compact vibration detection device can be provided.

According to a sixth aspect of the present invention, there is provided a vibration detecting apparatus according to the sixth aspect of the present invention, wherein the display means has a large number of unit level portions and the detection signal is high. The level display unit displays the current vibration value of the vibration measurement object and the set value of the vibration of the vibration measurement object in the number of levels, which is the number of unit level parts.

With this configuration, the set value (threshold value) can be set finely, and the set value (threshold value) can be set several times as large as the vibration value. Thus, a compact vibration detection device can be provided.

According to a sixth aspect of the present invention, there is provided a vibration detecting apparatus according to the fifth aspect, wherein the display means comprises a vibration measuring object whose magnitude is a detection signal. Is a numeral display section for displaying the current vibration value and the set value of the vibration of the vibration measurement object by numbers.

With this configuration, the set value (threshold) can be set finely, and the set value (threshold) can be set several times as large as the vibration value. Thus, a compact vibration detection device can be provided.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

(Embodiment 1) FIGS. 1 to 6 show Embodiment 1 of a vibration detecting device according to the present invention.

The vibration detecting device A according to the present invention has a housing 1
, An electronic device mounting unit 30 and a vibration sensor 8. The housing 1 has one case 2 and the other case 3. Then, one of the cases 2 has a terminal block 4,
5, an operation unit 6, and a display unit 7 are provided.

The terminal block 4 has a power terminal 4 A for supplying power from the outside and a sensor terminal 4 for connecting the vibration sensor 8.
B, an output terminal 5A which is an output unit 14 which outputs an analog signal (AD) of the vibration sensor 8 and outputs a monitor by switching, and a detection of abnormal vibration. For example, an output unit 1 that relays output to an output relay
4 and a relay terminal 5B.

The terminal block 5 is provided with a surface portion 5A, on which an insertion hole 5a, a switching operation portion insertion hole 5b, and a display portion insertion portion 5c are formed. In addition, surface part 5
A has an amplification factor setting switch 9A and a power-on display LED
16, a window (not shown) such as a threshold exceeded display LED 12A is provided.

The electronic device mounting section 30 has first, second, and third boards 31, 32, and 33. The first board 31 has a level display section 15 as display means, A threshold value setting unit (threshold value setting volume) 12 as a setting value setting unit for setting a threshold value as a setting value, and an output / display switching unit 13 as a switching unit are mounted.

The other case 3 houses the second and third substrates 32 and 33 connected to each other, and also houses the first substrate 31 while being connected to the second substrate 32. Then, one case 2 is engaged with the other case 3, the threshold setting unit 12 is inserted into the insertion hole 5 a, and the output / display switching unit 13 is inserted.
The operation bar 13A is inserted into the switching operation section insertion hole 5b, and the level display section 15 is inserted into the display section insertion section 5c, so that the housing 1 and the electronic device mounting section 30 are assembled.

As shown in FIG. 3, the electronic equipment mounting section 30 includes a controller section 20 as a signal processing means. The controller section 20 includes an amplifying section 9 for amplifying a detection signal of the vibration sensor 8, A frequency filter section 10 and a rectifier circuit (not shown) on the output side of the frequency filter section 10
A microcomputer 11, which is connected via a microcomputer, the threshold setting unit 12, the output / display switching unit 13 which is connected to the output side of the threshold setting unit 12 and is connected to the microcomputer 11, and the output / display The output unit 14 connected to the output side of the switching unit 13 and the level display unit 15 connected to the output side of the microcomputer 10
Connected to an external power supply, for example, + 5V and + 8V.
And a power supply circuit 18 which is a system stabilized power supply.

The output unit 14 serving as an output means outputs a current vibration value and a threshold value to a (DC) analog output, and outputs a monitor output and a relay output. (DC) The analog output, that is, the DC analog output or the analog output outputs the magnitude of vibration at 4 to 20 mA or 0 to 5 V, and the output is close to DC. Further, the monitor output is a waveform output with the vibration as it is, and this output is an AC output. The relay output is a comparison output between the set value (threshold) and the current vibration value. Further, the output / display switching unit 13 includes the level display unit 1.
5, the display of the current vibration value and the threshold value is switched, and the output of the current vibration value and the threshold value to the outside is switched.

The operation section 6 has the threshold value setting section 12, the output / display switching section 13, and an amplification rate setting switch 9A for setting the amplification rate of the amplification section 9.

The display unit 7 includes a power-on display LED 16 for displaying a power-on state, an output display LED 17 for displaying an abnormality detection output, and a threshold-exceeding display LED 12A for indicating that a detection signal has exceeded a threshold. And the level display section 15 for displaying the level of the detection signal. This level display section 15 has a large number (about 10) of unit level sections 1
5a are laminated.

The signal line 22a, the power supply line 22b and the ground line 22c of the cable 22 of the vibration sensor 8 are connected to the sensor terminal 4B.

Next, the operation of the vibration detecting device will be described. When a voltage of + 12V to + 24V is supplied from an external power supply,
The power supply circuit 18 serves as a two-system stabilized power supply of +5 V and +8 V. +5 V is mainly supplied to a digital circuit, and +8 V is mainly supplied to an analog circuit and the vibration sensor 8.

The detection signal of the vibration sensor 8 passes through the amplification section 9 and the frequency filter section 10, and is processed into a signal of amplitude and frequency components suitable for subsequent processing. This detection signal is taken into the microcomputer 11 via a rectifier circuit (not shown). This signal is output from a (DC) analog output of the output unit 14 and the level of the signal is displayed on the level display unit 15. Is done.

The detection signal of the vibration sensor 8 is compared with a set value of the threshold setting unit 12 by a comparison means built in the microcomputer 11 and is converted into a binary signal indicating whether or not the threshold has been exceeded. . Whether the vibration is normal or abnormal is determined from the binary signal data, and if the result is abnormal, the threshold display LED 12A and the output display LED 17 are turned on, and the output relay as the output unit 14 is operated.

The current vibration value is output from the (DC) analog output of the output unit 14 to the outside, and the current vibration value is measured as a voltage (current) value. The external output of the output unit is switched by the switching operation, and the threshold value is measured by a voltage (current) value from the (DC) analog output. As described above, since the current vibration value and the threshold value can be measured by the value of the voltage (current), the threshold value can be set while observing the value of the voltage (current). It can be set finely and the threshold value can be set to several times the vibration value.

Further, by grasping the current vibration value and the threshold value as described above, it is possible to judge the current operation state of the vibration measurement object at the site, and it is possible to inspect the machine at the start of operation. Also, on-site management becomes easier.

The controller 20-1 shown in FIG. 4 may be used as the controller. The controller unit 20-1 is provided with the microcomputer 1 described above.
Except for 1, a comparator 19 as a signal processing unit is interposed between the amplifying unit 9 and the output / display switching unit 13, and the comparator 19 compares the detection signal with the set value of the threshold value setting unit 12. , May be converted into a binary signal indicating whether or not the threshold value is exceeded. In this case, the other configuration is the same as that of the above-described controller unit 20, so that the same reference numerals are given and the description is omitted.

In this case, the detection signal of the vibration sensor 8 passes through the amplification unit 9 and the frequency filter unit 10, and is processed into a signal of an amplitude and a frequency component suitable for the subsequent processing. The detection signal is output from the output unit 14 as a monitor signal through a monitor output circuit (not shown), and the level display unit 15 displays the magnitude of the signal.

The detection signal of the vibration sensor 8 is compared with the set value of the threshold setting unit 12, that is, the threshold by the comparator 19, and converted into a binary signal indicating whether or not the threshold is exceeded. It is determined whether the vibration is normal or abnormal based on the binary signal data.
12A and the output display LED 17 are turned on, and the output unit 14
Activate the output relay.

Also, as shown in FIG.
The second substrate 32-1 is attached to one end of the first substrate 31-1.
On the other end of the first substrate 31-1.
And the first, second, and third boards 31-1, 32-1, and 33-1 are assembled into a unit, and the unitized electronic device mounting unit 30 is connected to the other case 3. And one of the cases 2 is engaged with the other case 1 so that the level display unit 15 is set to the threshold setting unit 12.
Is inserted into the unit insertion hole 5a, the operation bar 13A of the output / display switching unit 13 is inserted into the switching operation unit insertion hole 5b, and the level display unit 15 is inserted into the display unit insertion unit 5c. The unit 30 may be assembled.

According to the first embodiment of the present invention described above, the current vibration value is output from the (DC) analog output of the output unit 14 to the outside, and this current vibration value is expressed as a voltage (current) value. By measuring and switching the external output of the output unit by the switching operation of the output / display switching unit 13, the threshold value can be measured by the voltage (current) value from the (DC) analog output. For this purpose, the threshold is determined by the voltage (current)
Can be set while looking at the value of, the threshold value can be set finely, and the threshold value can be set to several times the vibration value.

Further, by grasping the current vibration value and the threshold value as described above, it is possible to judge the current operation state of the vibration measurement object at the site, and to perform an inspection at the start of the machine. Also, on-site management becomes easier.

As the controller section 20, FIG.
As shown in the figure, the number display A and the level display B are switched by the changeover switch 36, and this switching signal is input to the microcomputer 11 so that the display section is switched to the number display section 2.
1 or the level display unit 15 may be used.

(Embodiment 2) FIGS. 7 to 10 show Embodiment 2 of a vibration detecting apparatus according to the present invention.

In the second embodiment of the vibration detecting apparatus according to the present invention, the display means is changed to the level display section 15 of the first embodiment, and the numerical display section 21 capable of displaying three or more digits is used. Since the other configuration is the same as that of the vibration detecting device of the first embodiment, the same reference numerals are given and the description is omitted.

In the second embodiment of the vibration detecting apparatus according to the present invention, there are a case where the controller 20 shown in FIG. 8 is used and a case where the controller 20-1 shown in FIG. 9 is used.

The case of the vibration detecting device A using the controller section 20 shown in FIG. 8 will be described. In this case, when a voltage of +12 V to +24 V is supplied from an external power supply, the power supply circuit 18 becomes a two-system stabilized power supply of +5 V and +8 V, and +5 V is mainly used for digital circuits and +8 V is mainly used for analog systems. It is supplied to the circuit and the vibration sensor 8.

The threshold value, which is a set value, is displayed on the numeric display unit 21 by the switching operation of the output / display switching unit 13, and the threshold value is set finely. And output / display switching unit 1
By switching “3”, the display of the threshold from the numeric display unit 21 is erased.

The detection signal of the vibration sensor 8 passes through the amplification unit 9 and the frequency filter unit 10 and is processed into a signal of an amplitude and a frequency component suitable for the subsequent processing. This detection signal is taken into the microcomputer 11 via the rectifier circuit, and the magnitude of the signal is displayed by a numeral on the numeral display unit 21.

The detection signal is compared with a set value of the threshold setting unit 12 by a comparison means built in the microcomputer 11 and converted into a binary signal indicating whether or not the threshold value has been exceeded. It is determined whether the vibration is normal or abnormal based on the binary signal data.
12A and the output display LED 17 are turned on, and the output relay is operated.

The current vibration value is measured by the magnitude of the signal displayed on the numeric display unit 21, and the threshold value is displayed on the numeric display unit 21 by the switching operation of the output / display switching unit 13, so that the on-site In, the current operation state of the vibration measurement object can be determined.

In the case of the vibration detecting device A using the controller unit 20-1 shown in FIG. 9, the detection signal of the vibration sensor 8 passes through the amplifying unit 9 and the frequency filter unit 10 and has an amplitude suitable for the subsequent processing. And processed into frequency component signals. This detection signal is sent to the number display unit 21 via the output / display switching unit 13.
The number of the signal is displayed by the number.

The detection signal is compared with the set value of the threshold setting unit 12 in the comparator 19, and is converted into a binary signal indicating whether or not the threshold value has been exceeded. Whether the vibration is normal or abnormal is determined from the binarized signal data, and if the result is abnormal, the threshold display LED 12A and the output display LE
D17 is turned on, and the output relay is operated.

Further, as shown in FIG. 10, one end of the first substrate 31-1 of the electronic device mounting section 30 is attached to the second substrate 32-1.
1 on the other end of the first substrate 31-1.
1, the first, second, and third boards 31-1, 32-1, and 33-1 are assembled into a unit, and the unitized electronic device mounting unit 30 is connected to the other case 3. And one of the cases 2 is engaged with the other case 1 so that the level display unit 15 is set to the threshold setting unit 12.
Into the insertion hole 5a and the operation bar 1 of the output / display switching unit 13.
The housing 1 and the electronic device mounting unit 30 may be assembled by inserting 3A into the switching operation unit insertion hole 5b and inserting the level display unit 15 into the display unit insertion unit 5c.

According to the second embodiment described above, by displaying the number display section 21 with the LED display, it is easy to see even in a dark place, and for displaying the number, the vibration value can be understood more finely than the level display section. Become like Further, by switching the display to the threshold value, the value can be set finely, and the current can be saved as compared with a level display unit having 15 or more levels.
In addition, the numerical display makes it possible to easily perform numerical management of the machine and the vibrating body in the maintenance / TPM, to perform an inspection at the start of the machine, and to facilitate on-site management.

If the number display unit has an additional A / D conversion function, it is easy to understand (in this case, a microcomputer is used) if acceleration, velocity, and displacement are displayed in the unit system, and inexpensive parts cost is reduced. Up can respond.

FIGS. 11 to 1 show a vibration sensor.
There is a vibration sensor 8-1 shown in FIG. This vibration sensor 8-
An operational amplifier 47 includes a base 40, a piezoelectric element 44, an impedance conversion circuit 45, and an amplification circuit 46.
And a case 42.

The base 40 is a rectangular plate, and a hole 43 is formed in the surface 40 a of the base 40.

A vibration sensor 8-1 shown in FIG.
Surface mount type piezoelectric element 44 as shown in the circuit configuration of
An operational amplifier 47 having an impedance conversion circuit 45 and an amplification circuit 46 is mounted. Further, a hole 48 is formed in the substrate 41, and a cable 49 connected to a detection signal input side of the vibration detection device A is connected to a base of the substrate 41.

The cover 42 is made of an insulating synthetic resin, and has a box shape having a bulging portion 42A on its front side.
A hole 50 is formed in the surface 42 a of the cover 42, and the periphery of the hole 50 is reinforced by a metal frame edge 51.

Then, the substrate 41 is overlaid on the base 40,
The vibration sensor 8-1 is configured by assembling the base 42 with the case 42 placed thereon. In this case, cover 4
The second hole 50, the hole 47 of the substrate 41, and the hole 43 of the base 40 are coaxially located, and these constitute a mounting hole (screw member insertion hole) 52. .

The vibration sensor 8-1 configured as described above
The mounting bolt 52 (not shown), which is a mounting screw member inserted into the mounting hole 52, is screwed into the screw hole (not shown) of the vibration measurement object (not shown) using the mounting hole 52. And attached to the vibration measurement object.

When the vibration sensor 8 is vibrated in a state where current is supplied from the power supply line 49 A of the cable 49, a voltage is generated in the piezoelectric element 44. This voltage, that is, the signal, is lowered in impedance by the impedance conversion circuit 45 of the operational amplifier 47 and is amplified (increases sensitivity) by the amplification circuit 46, and is output from the output line 49 of the cable 49.
B is sent to the detection signal input side of the vibration detection device A.

As shown in FIGS. 16A and 16B, the vibration sensor 8 conventionally used generally has a case 57 provided with a mounting screw portion 56 at one end thereof. A cable 58 protrudes from the other end or the periphery of the cable.

When such a vibration sensor 8 is attached to a vibration measurement object, the mounting screw portion 56 is screwed into a screw hole of the vibration measurement object and attached to the vibration measurement object. , The case 57 needs to be rotated. For this reason, the cable 58 must also be rotated (twisted), and this cable 58 becomes entangled with other objects, and the power source for the rotating objects such as motors and gears is turned off. If the vibration sensor 8 is attached without being cut, the cable 58 may be entangled with a gear or the like. However, in the embodiment of the present invention, the vibration sensor 8-1 of the third embodiment is applied to the vibration measurement target. At the time of mounting, the vibration sensor 8-1 is not rotated, and the cable 49 is not rotated (twisted), so that the cable 49 is not entangled or entangled in a gear or the like. .

Further, as shown in FIG.
In -1, the hum noise can be removed by covering the piezoelectric element 44 with the shield cover 60, and
As shown in FIG. 15, the substrate 61 is connected to the tip of the substrate 41, the piezoelectric element 44 is mounted on the substrate 61, and the substrate 61 is covered with the shield cover 60, so that the substrate 61 becomes a part of the shield cover 60. You can also.

(Embodiment 3) As a vibration detecting apparatus (Embodiment 3) according to the present invention, as shown in FIG.
(Or the controller unit 20-1) may be incorporated to constitute the vibration sensor A-1 integrated with the vibration sensor.

In the vibration detecting device A-1, the cover 42
And a display unit 7 including an operation unit 6 and a level display unit 15 (or a numeric display unit 21).

The attachment of the vibration detecting device A-1 to the vibration measuring object is performed by using the mounting hole 52 in the same manner as the mounting of the vibration sensor 8-1 to the vibration measuring object. The mounting bolt inserted into the mounting hole 52 is screwed into the screw hole of the vibration measurement object, and attached to the vibration measurement object.

Since the vibration detecting device A-1 is constructed by incorporating the controller section 20 or the controller section 20-1 into the above-described vibration sensor 8-1, it is low in height, that is, thin and small. A vibration detection device can be provided.

As described above, in the vibration detecting device A-1, the surface mount type piezoelectric element 44 that generates a voltage by being vibrated, and the impedance conversion for controlling the impedance of the detection signal of the piezoelectric element 44 A vibration sensor 8-1 in which a circuit 45 and an amplification circuit 46 for amplifying a detection signal are mounted on a substrate 41, and a threshold setting unit 12 for setting a threshold
A display unit (the level display unit 15 or the numeric display unit 21) for displaying the current vibration value and the set value of the vibration measurement object that is the magnitude of the detection signal, and outputting the detection signal to the outside to display the current vibration Output unit 1 capable of measuring values and threshold values
4 and a display unit (level display unit 15 or numeric display unit 2)
An output / display switching unit 13 which is a switching unit for switching the display of the current vibration value and the set value in 1) and for outputting the current vibration value and the set value to the outside in the output unit 14; 8-1 and a display unit (the level display unit 15 or the number display unit 21), the output unit 14, and the output / display switching unit 13 are unitized.

With this configuration, the threshold value can be set finely, the threshold value can be set to several times the vibration value, and the current operating state of the vibration measurement object is determined at the site. Not only can the machine be checked at the start of operation, but it also makes it easier to perform on-site management,
It is possible to provide a small vibration detection device having a low height, that is, a thin shape.

[0079]

As described above, according to the vibration detecting device of the present invention, the current vibration value at the output unit is output to the outside, and the current vibration value is set to, for example, a voltage (current) value. An external output of the output unit is switched by the switching operation of the switching unit, and a set value (threshold) is output, and the set value (threshold) can be set to, for example, a voltage (current) value. Also, the current vibration value of the vibration measurement object can be read from the display means, and the set value (threshold) can be displayed on the display unit by the switching operation of the switching means.

For this reason, the set value (threshold) can be set while looking at the value of the voltage (current), and can be set while looking at the display on the display means. Can be set finely, and the set value (threshold) can be set to several times the vibration value.

Further, by grasping the current vibration value and the set value (threshold value) as described above, it is possible to judge the current operation state of the vibration measurement object at the site, and Inspections and on-site management becomes easier.

Further, according to the vibration detecting apparatus of the present invention, the display means includes the present vibration value and the vibration measurement object of the vibration measurement object having a large number of unit level portions and having the magnitude of the detection signal. By setting the vibration set value to the level display section that displays the number of levels that is the number of unit level sections,
The current vibration value in the output unit is output to the outside, the current vibration value is set to, for example, a voltage (current) value, and the external output of the output unit is switched by the switching operation of the switching unit, and the set value (threshold) is output. Then, the set value (threshold) can be set to, for example, a voltage (current) value. For this reason, it is possible to set the set value (threshold) while observing the value of the voltage (current), so that the set value (threshold) can be set finely and several times the vibration value. It is possible to set a set value (threshold).

Further, by grasping the current vibration value and the set value (threshold value) as described above, it is possible to judge the current operating state of the vibration measurement object at the site, and Inspections and on-site management becomes easier.

Further, according to the vibration detecting apparatus of the present invention, the display means displays the current vibration value of the vibration measuring object and the set value of the vibration of the vibration measuring object, which are the magnitudes of the detection signals, by numbers. By making the number display part to display,
The current vibration value of the vibration measurement object is read from the numeral on the numeral display unit, and the set value (threshold) can be displayed on the numeral display unit by the switching operation of the switching unit. For this reason, it becomes possible to set this set value finely, and because of the numerical display, the vibration value can be found more finely than the level meter. In addition, for display of numbers,
The numerical control of the machine and the vibrating body can be easily performed by using the digital camera, and the LED display on the numeral display makes it easy to see even in a dark place.

Further, the current vibration value is measured by the magnitude of the signal displayed on the numeric display, and the set place (threshold) is displayed on the numeric display by the switching operation of the switching means, so that the It is possible to judge the current operating state of the vibration measurement object, to perform an inspection at the time of starting the machine, and to facilitate on-site management.

According to the vibration detecting device of the present invention, the vibration sensor generates a voltage by being vibrated, the surface mount type piezoelectric element, and the impedance conversion for controlling the impedance of the detection signal of the piezoelectric element. A circuit for mounting a circuit and an amplifier circuit for amplifying a detection signal, and a housing case incorporating the substrate, and a screw for mounting at least the vibration sensor to the vibration measurement target with a mounting screw member on the housing case. By providing a member insertion hole,
Attachment of the vibration sensor to the vibration measurement object can be performed by inserting the mounting screw member into the screw member insertion hole and screwing the mounting screw member into the vibration measurement object. Since the cable is not rotated and the cable of the vibration sensor is not rotated (twisted), the cable is not entangled or entangled in a gear or the like.

Further, according to the vibration detecting device of the present invention, a surface mount type piezoelectric element for generating a voltage by being excited, an impedance conversion circuit for controlling the impedance of a detection signal of the piezoelectric element, and a detection signal A vibration sensor having an amplification circuit mounted on a substrate for amplifying the vibration, a set value setting means for setting a set value of the vibration of the vibration measurement object, and a current vibration value and setting of the vibration measurement object which is the magnitude of the detection signal Display means for displaying a value, output means for outputting a detection signal to the outside so that the current vibration value and the set value can be measured, and switching between display of the current vibration value and the set value on the display means, and output Switching means for switching the output of the current vibration value and the set value to the outside in the means, wherein the vibration sensor, the set value setting means, the display means, the output means, and the switching means are combined. The set value (threshold value) can be set finely, and the set value (threshold value) can be set several times as large as the vibration value. Can provide a low-height, thin, and compact vibration detection device that not only makes it possible to judge the current operating state of the machine, perform inspections at the start of the machine, and facilitate on-site management. be able to.

[Brief description of the drawings]

FIG. 1A is a perspective view of a vibration detection device (first embodiment) according to the present invention. FIG. 2B is a front view of the vibration detection device.

FIG. 2 is an exploded perspective view of the vibration detecting device.

FIG. 3 is an explanatory diagram of a configuration of a controller unit in the vibration detection device.

FIG. 4 is an explanatory diagram of a configuration of another controller unit in the vibration detection device.

FIG. 5 is a configuration explanatory diagram of another controller in the vibration detection device.

FIG. 6 is a perspective view of the vibration detection device in an exploded state.

FIG. 7 is a vibration detection device according to the present invention (Embodiment 2);
FIG. 4 is a perspective view of a disassembled state.

FIG. 8 is an explanatory diagram of a configuration of a controller unit in the vibration detection device.

FIG. 9 is a configuration explanatory diagram of another controller unit in the vibration detection device.

FIG. 10 is a perspective view of the vibration detecting device in an exploded state.

FIG. 11 is a perspective view of a vibration sensor in the vibration detection device.

FIG. 12 is a perspective view of the vibration sensor in an exploded state.

FIG. 13 is an explanatory diagram of a configuration of a circuit section of the vibration sensor.

FIG. 14 is a perspective view showing another configuration of the substrate portion in the vibration sensor.

FIG. 15 is a perspective view showing another configuration of the substrate part in the vibration sensor.

16 (1) and (2) are perspective views of a conventional vibration sensor.

FIG. 17 is a perspective view of a vibration detection device (third embodiment) according to the present invention.

FIG. 18 is a perspective view of a conventional vibration detection device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 2 One case 3 The other case 4 Terminal block part 5 Terminal block part 6 Operation part 7 Display part 8 Vibration sensor 8-1 Vibration sensor 9 Amplification part 10 Frequency filter 11 Microcomputer 12 Threshold value setting part (setting value setting Means 13 output / display switching unit (output / display switching unit) 14 output unit 15 level display unit (display unit) 16 power-on display LED 17 output display LED 18 power supply circuit 19 comparator (signal processing unit) 20 controller unit (signal Processing unit) 20-1 Controller unit (signal processing unit) 21 Numeric display unit (display unit) 22 Cable 30 Electronic component mounting unit 31 First substrate 32 Second substrate 33 Third substrate 40 Base (housing case) 41 substrate 42 cover (housing case) 43 hole 44 piezoelectric element 45 impedance conversion circuit 46 increase Circuit 47 operational amplifier 48 hole 49 cable 50 pore 51 frame edge portion 52 mounting holes (screw member insertion hole) 60 shield cover 61 substrate A vibration detecting device A-1 vibration detecting device

Claims (7)

[Claims] 1. A vibration detecting apparatus which receives a detection signal of a vibration sensor, performs signal processing by signal processing means, and displays the detection signal according to the magnitude thereof. Setting value setting means for setting a setting value of vibration; display means for displaying a current vibration value of the vibration measurement object which is the magnitude of the detection signal and the setting value set by the setting value setting means; Output means for outputting a detection signal to the outside so that the current vibration value and the set value can be measured, and switching between the display of the current vibration value and the set value on the display means, and the output means Switching means for switching the current vibration value and the set value to an external output. 2. A display device, comprising: a plurality of unit level portions, wherein a current vibration value of a vibration measurement object and a set value of vibration of the vibration measurement object, which are magnitudes of a detection signal, are displayed on the unit level. The vibration detecting device according to claim 1, wherein the vibration detecting device is a level display unit that displays the number of levels, which is the number of units. 3. A numerical display unit for displaying a current vibration value of a vibration measurement object, which is a magnitude of a detection signal, and a set value of vibration of the vibration measurement object by numbers, respectively. Vibration detection device. 4. A surface mount type piezoelectric element that generates a voltage by vibrating a vibration sensor, an impedance conversion circuit that controls the impedance of a detection signal of the piezoelectric element, and an amplifier circuit that amplifies the detection signal. 2. A mounting board, comprising: a housing case housing the board; wherein the housing case is provided with a screw member insertion hole for mounting the vibration sensor to an object to be measured with a mounting screw member. Or the vibration detection device according to claim 2 or 3. 5. A vibration detecting device which receives a detection signal of a vibration sensor, performs signal processing by signal processing means, and displays the detection signal in accordance with the magnitude thereof. Surface-mounted piezoelectric element that generates a voltage according to the above, a vibration sensor in which an impedance conversion circuit that controls the impedance of a detection signal of the piezoelectric element and an amplification circuit that amplifies the detection signal are mounted on a substrate, Setting value setting means for setting the set value of, a display means for displaying the current vibration value of the vibration measurement object that is the magnitude of the detection signal and the set value, and outputting the detection signal to the outside, An output unit configured to measure a current vibration value and the set value; and a display unit configured to switch display of the current vibration value and the set value on the display unit. Switching means for switching the output of the current vibration value and the set value to the outside in the means, wherein the vibration sensor, the display means, the set value setting means, the output means, and the switching means are unitized. A vibration detecting device characterized by the above-mentioned. 6. The display means has a number of unit level portions and displays the current vibration value of the vibration measurement object and the set value of the vibration of the vibration measurement object, which are the magnitude of the detection signal, in the unit. 6. The vibration detecting device according to claim 5, wherein the vibration detecting device is a level display unit that displays the number of levels, which is the number of the level units. 7. A numerical display unit for displaying a current vibration value of a vibration measurement object, which is a magnitude of a detection signal, and a set value of vibration of the vibration measurement object by numbers, respectively. Vibration detection device.