JPH075027A - Measuring and indicating apparatus for vibration and temperature - Google Patents

Abstract

PURPOSE:To make it possible to observe a measured indication value while confirming the pressing condition of a probe against an object to be measured by building a vibration sensor, a temperature sensor and a signal processing circuit in the probe and providing an output indication section thereto. CONSTITUTION:A protection pie 3 is projected from a top end of a probe 1, a top end of a thermocouple 5 is projected therefrom and a tip portion of vibration detection needle 7 is projected from the center thereof. An indication section 8 of the measured values of the vibration and temperature is provided on the central portion of the probe 1. The probe 1 is grabbed by a hand and the needle 7 and thermocouple 5 are pressed against a surface of an object and furthermore, the top face of a contact plate of the thermocouple 5 is pushed in up to the top face of the pipe 3. A mechanical vibration of the object acts to a piezoelectric element via the needle 7 and the voltage variation of the piezoelectric elements is transmitted to an earphone 10 via a signal processing circuit to generate a vibration sound. The voltage variation is also transmitted to a CPU so that the average or a peak value thereof is indicated on the indication section 8 with a digital value 8a or a bar graph 8b. A temperature signal of the object is detected by the thermocouple 5 and is transmitted to the CPU to be indicated on the indication section 8 with a digital value 8a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compressor, a turbine, a pump, various rotary machines such as bearings and gears, and vibrations caused by the operation of valves and steam traps through which a fluid passes. The present invention relates to a vibration and temperature measurement display device used for detecting temperature and confirming whether the operation is good or bad.

A large number of various rotary machines and valves are installed in the production sites of factories and plants, and these machines and valves obtain the maximum production amount with the minimum energy consumption and maintain the highest production quality. In order to do so, its operating status is checked constantly or regularly.

[0003]

2. Description of the Related Art As a conventional vibration and temperature measurement display device, there is one disclosed in Japanese Utility Model Publication No. 4-25625. This is a probe main body with a built-in vibration sensor and a temperature sensor, a signal processing circuit for processing signals from the sensor and a display section for displaying the output from the signal processing circuit, and the probe. It consists of a connection cable for connecting to the instrument body.

[0004]

In the above-mentioned conventional device, since the probe and the instrument body are separated from each other, the measurement was performed while confirming the pressing state of the probe against the object to be measured. Since the displayed values of vibration and temperature cannot be seen, when the measured vibration and temperature values are greatly different depending on the contact state of the probe, or the measured object is at high temperature or is rotating at high speed. Had problems such as being dangerous.

Therefore, a technical object of the present invention is to provide a vibration and temperature measurement indicator capable of safely and accurately measuring vibration and temperature.

[0006]

Means for Solving the Problems The technical means of the present invention, which has been devised to solve the above-mentioned technical problems, includes a vibration sensor, a temperature sensor, and a signal processing circuit for processing electric signals from both sensors. It is characterized in that the probe is provided with a display section for displaying the output from the signal processing circuit while being built in the probe.

[0007]

The operation of the above technical means is as follows.
Since the probe is provided with a vibration sensor, a temperature sensor, a signal processing circuit for processing electric signals from both sensors, and a display section for displaying the output from the signal processing circuit, the probe for the object to be measured is provided. It is possible to see the measured values of vibration and temperature while keeping the pressed state safe and in good condition.

[0008]

EXAMPLES Examples showing specific examples of the present invention will be described (see FIGS. 1 to 3). FIG. 1 shows a front view of the vibration and temperature measurement indicator of the present invention. Screw 2 from the top of probe 1
The protective tube 3 fixed by a and 2b projects, the upper end of the thermocouple 5 of the temperature sensor 4 slightly projects from the upper end of the protective tube 3, and the vibration detection needle 7 of the vibration sensor 6 extends from the center of the thermocouple 5.
The tip of is slightly protruding. Further, a display portion 8 for displaying measured values of vibration and temperature is provided in the approximate center of the probe 1. The display unit 8 displays the measured value as a digital 8a and a bar graph 8b. Below the display unit 8, a power source and a key 9 for shifting and displaying a desired measurement result are provided. An earphone 10 is connected to the side surface of the probe 1.

FIG. 2 shows a cross section of only the upper portion of the probe 1. A small-diameter male screw is formed in the lower portion of the vibration detecting needle 7, and a vibration transmitting plate 11 having a female screw is screwed to the upper surface of the vibration transmitting plate 11 to abut the lower surface of the large diameter portion. Further, the electrode plate 12, the piezoelectric element 13, the electrode plate 14, and the weight 15 are sequentially inserted below the vibration transmission plate 11,
The nuts 16 are brought into contact with each other and fixed to the vibration detecting needle 7. The vibration detecting needle 7 and the vibration transmitting plate 11 are made of stainless steel, and the weight 15 is made of zirconia ceramic. The vibration detection needle 7, the vibration transmission plate 11, the electrode plate 12, the piezoelectric element 13, the electrode plate 14, and the weight 15 form a unit of the vibration sensor 6. The upper surface of the vibration transmitting plate 11 and the lower surface of the weight 15 are sandwiched by the switch fittings 17 fixed to the probe 1. The switch fitting 17 is formed by an upper wall, two side walls on both sides extending downward from the upper wall, and a bifurcated spring portion extending further downward from an end on the opposite side of the upper wall. It is fixed to Bu 1. Further, the vibration sensor 6 is biased upward by the spring portion, and the upper surface of the vibration transmitting plate 11 is in contact with the lower surface of the upper wall. Further, the upper wall is provided with a notch from the front side to the opposite side, and the vibration detection needle 7 is inserted from the front side. The conductors (not shown) from the electrode plates 12 and 14 are signal processing circuits 1.
8 terminals 19 and 20 are connected.

The thermocouple 5 is a contact plate 21 in which the upper ends of the chromel and alumel long thin plates 5a and 5b are respectively bent inward, and a disk-like shape having a hole at the center above and below the bent part and the circumference being bent downward. It is formed by welding and fixing a disc-shaped protective plate 22 having a hole in the center. The lower portions of the thin plates 5a and 5b of the thermocouple 5 are wound around a large diameter hole in the lower portion of the heat insulating tube 23 and fixed by a ring 24 press-fitted into the large diameter hole of the heat insulating tube 23. A small gap is provided between the lower surface of the protective plate 22 of the thermocouple 5 and the upper surface of the heat insulating tube 23. Two windows 25a and 25b are provided on both sides of the heat insulating pipe 23. The protective tube 3 is inserted outside the heat insulating tube 23. Thermocouple 5, heat insulation tube 23, ring 24, and protection tube 3
A unit of the temperature sensor 4 is formed from the above. Thermocouple 5
The thin plates 5a and 5b are connected to terminals 27 and 28 of the signal processing circuit 18 via thermocouple contacts 26a and 26b, respectively.
The tip of the vibration detecting needle 7 slightly protrudes through the ring 24, the heat insulating pipe 23, and the thermocouple 5.

The block diagram of FIG. 3 shows the electrical circuit of the vibration and temperature measurement indicator of the present invention. The vibration sensor 6 built in the probe 1 shown in FIG. 2 is connected to the amplification circuit 31 of the signal processing circuit 18 also built in the probe 1, and the detection circuit 3
2 and further through the central processing circuit 33 to the display unit 8 also provided on the probe 1. Further, the amplifier circuit 31 is connected to the earphone 10 connected to the probe 1. The temperature sensor 4 built in the probe 1 shown in FIG. 2 is connected to the amplifier circuit 34 of the signal processing circuit 18, and is connected to the display unit 8 through the central arithmetic processing circuit 33.

When measuring the operating state of the object to be measured,
Grab the probe 1 with your hand and press the tip of the vibration detection needle 7 against the surface of the object to be measured to resist the elastic force of the spring part of the switch fitting 17 to the upper surface of the contact plate 21 of the thermocouple 5. By pushing in, the thermocouple 5 is also pressed against the object to be measured. Further, the thin plates 5a and 5b of the thermocouple 5 are bent to push the tip of the vibration detecting needle 7 and the upper surface of the contact plate 21 to the upper surface of the protective tube 3. The mechanical vibration of the object to be measured is transmitted to the vibration transmission plate 11 through the vibration detection needle 7, and the piezoelectric element 1 is generated as a pressure fluctuation.
Act on 3. In response to this, a voltage change occurs in the piezoelectric element 13. This voltage fluctuation is sent from the electrode plates 12 and 14 to the terminals 19 and 20 of the signal processing circuit 18 through the lead wires, amplified by the amplifier circuit 31 and sent to the earphone 10 to generate a vibration sound. Further, the signal is sent from the amplifier circuit 31 to the central processing circuit 33 through the detection circuit 32, and the average value, the peak value, etc. are displayed on the display unit 8 as a digital 8a or a bar graph 8b. On the other hand, the temperature signal of the object to be measured is detected by the thermocouple 5, sent to the terminals 27 and 28 of the signal processing circuit 18 through the thermocouple contacts 26a and 26b, and sent to the central processing unit 33 through the amplifier circuit 34. , Digital 8a is displayed on the display unit 8.

[0013]

The present invention produces the following unique effects. As described above, according to the present invention, by providing the probe with the vibration sensor, the temperature sensor, the signal processing circuit that processes the electrical signals from both sensors, and the display unit that displays the output from the signal processing circuit, Since the measured values of vibration and temperature can be viewed while confirming the pressing state of the probe against the object to be measured, the vibration and temperature can be measured safely and accurately.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a vibration and temperature measurement indicator of the present invention.

FIG. 2 is a sectional view of only the upper part of FIG.

FIG. 3 is a block diagram of an electric circuit.

[Explanation of symbols]

 1 Probe 4 Temperature Sensor 5 Thermocouple 6 Vibration Sensor 7 Vibration Detection Needle 8 Display 10 Earphone 13 Piezoelectric Element 18 Signal Processing Circuit 31, 34 Amplification Circuit 32 Detection Circuit 33 Central Processing Circuit

Claims (1)

[Claims] 1. A vibration sensor, a temperature sensor, and a signal processing circuit for processing electric signals from both sensors are built in the probe, and a display section for displaying an output from the signal processing circuit is provided in the probe. A vibration and temperature measurement display characterized in that