JP7253277B2 - Measuring device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a portable measuring device that detects the vibration intensity of a measurement target such as a steam trap or piping through which steam or condensate flows by pressing a measurement probe against the measurement target.

As an example of the above measuring device, a measuring device disclosed in Patent Document 1, for example, is known. This measuring device comprises a box-shaped device main body provided with a liquid crystal display, and an axial probe protruding from the end face of the device. The probe consists of a detection needle, a protective tube placed around it, and a thermocouple provided at the tip of the protective tube. , it is possible to simultaneously measure the vibration intensity and the surface temperature of the measurement surface.

In this measuring device, the vibration input from the detection needle is converted into an electric signal by the piezoelectric element, and sent to the circuit board for arithmetic processing of the signal. In the circuit board, the electric signal sent from the piezoelectric element is amplified by the amplifier and input to the controller via the A/D converter. Then, the control unit diagnoses the state of the object to be measured based on, for example, the correlation between the vibration intensity of the surface to be measured and the surface temperature.

JP 2020-34419 A

In the case of a portable measuring device like the one described above, if the object to be measured is in a complicated pipework, it may be difficult to properly press the tip of the probe against the object to be measured because the main body of the device gets in the way. . Therefore, it is convenient for the probe to be as long as possible, but it is difficult to actually lengthen the probe due to restrictions due to the frequency of vibration to be detected (resonant frequency) and restrictions on strength.

Therefore, for example, a structure in which the protection tube is elongated and the detection needle is held at the tip of the protection tube is conceivable. Noise is likely to enter the electrical signal sent from the piezoelectric element through the piezoelectric element, and as a result of the electrical signal including this noise being amplified by the amplifier, the measurement accuracy is affected.

The present invention has been made in view of the above circumstances, and is a portable type that can easily measure the vibration intensity of an object to be measured in a place where piping is complicated and can ensure high measurement accuracy. The object is to provide a measuring device for

A measuring device according to one aspect of the present invention includes a shaft-shaped vibration probe including a vibration sensor that outputs a signal corresponding to the vibration intensity of an object to be measured, a circuit board for processing the signal, and the vibration sensor. a case in which the probe and the circuit board are incorporated; the case includes a box-shaped case main body in which the circuit board is incorporated; The circuit board includes a main portion accommodated in the case body, and an extension portion extending from the main portion and inserted into the sleeve, The vibration sensor is electrically connected to the extension portion.

According to this measuring device, the dimension of the shaft-like portion from the end surface of the case main body to the tip of the vibration probe can be lengthened by the length of the protruding dimension of the sleeve portion. In other words, a structure equivalent to that of an elongated vibration probe can be achieved without lengthening the vibration probe itself. Moreover, a portion of the circuit board (extended portion) is inserted inside the sleeve portion, and the vibration probe and the circuit board are electrically connected at this extended portion. ) can also be kept narrow, thereby suppressing noise intrusion into the output signal from the vibrating probe. Therefore, according to this measuring device, it is possible to provide a portable measuring device that can easily measure the vibration intensity of an object to be measured in a place where pipes are complicated and that can ensure high measurement accuracy. becomes.

In the measuring device described above, it is preferable that the extension portion is fixed to the sleeve portion. More specifically, the extended portion is fixed to the case at both end portions in an orthogonal direction perpendicular to the axial direction of the vibration probe, the vibration sensor has connection wiring, and the It is preferable that the extension portion is electrically connected to regions inside the end portions through the connection wiring.

According to these configurations, it is possible to stably maintain a good electrical connection state between the vibration probe and the extension portion (circuit board). That is, it can be said that the extension portion of the circuit board is an unstable portion that extends from the body portion to the inner side of the sleeve portion. Therefore, if the extended portion is not fixed, it is conceivable that cracks may occur in the connecting portion between the vibration probe and the extended portion due to vibration during transportation, resulting in poor connection. However, according to the above configuration, the extended portion is fixed to the case and stabilized, so the occurrence of the phenomenon described above is suppressed. In particular, according to the configuration in which both end portions of the extension portion are fixed and the connection wiring is connected to the inner region thereof, the electrical connection state between the vibration probe and the extension portion is more stable and favorable. can be kept at

In this case, a wiring-side connector is provided at the end of the connection wiring of the vibration sensor, a board-side connector is provided in the inner region of the extension portion, and the wiring-side connector is connected to the board-side connector. It is preferable that the vibration sensor is electrically connected to the circuit board by being connected.

According to this configuration, it is possible to easily connect and disconnect the wiring between the vibration sensor and the circuit board, and the ease of assembly and maintenance of the measuring device is improved.

The above measuring device further includes a temperature probe for detecting the surface temperature of the object to be measured, the vibration probe includes a cylindrical vibration input section at its tip, and the temperature probe is configured to detect the vibration input. It may be arranged inside the portion and electrically connected to the extension portion.

According to this configuration, it is possible to measure the surface temperature of the object to be measured at the center portion of the tip of the vibration probe while enjoying the effects as described above. Therefore, it is possible to simultaneously measure the vibration intensity and the surface temperature of the object to be measured in a place where piping is complicated.

In this case, the extension part is fixed to the case at both ends, and the temperature probe has a connection wiring, and the extension part has a higher temperature than the both ends. It is preferable that they are electrically connected to the inner region via the connection wiring.

According to this configuration, as with the vibration probe, it is possible to stably maintain the electrical connection state of the connection portion of the temperature probe with the extended portion (circuit board).

According to the measuring apparatus of the present invention described above, it is possible to easily measure the vibration intensity of the object to be measured located in a place where piping is complicated, and to ensure high measurement accuracy.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the measuring device which concerns on this invention, (a) is a front view, (b) is a side view, (c) is a rear view. 1 is a perspective view of a measurement probe; FIG. FIG. 4 is a cross-sectional view of the measurement probe; It is a top view which shows the internal structure of a measuring device. FIG. 5 is an enlarged view of a portion surrounded by a circle frame in FIG. 4;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[Overall Configuration of Measuring Device]
FIG. 1 shows an example of a measuring device 1 according to the present invention, wherein (a) is a front view, (b) is a side view, and (c) is a rear view of the measuring device 1, respectively.

The measuring device 1 shown in the figure detects the state of objects to be measured such as steam traps and pipes through which steam or condensate (drain) flows, and wirelessly transmits the results to a diagnostic device (not shown). In this example, the measuring device 1 measures the vibration intensity and the surface temperature of the object to be measured. The direction and arrangement used in the following description of the measuring device 1 are based on the state (orientation) of the measuring device 1 shown in FIG. 1A unless otherwise specified.

As shown in FIGS. 1(a) to 1(c), the measuring device 1 includes a rectangular parallelepiped device body 6 elongated in the vertical direction and flat in the front-rear direction (left-right direction in FIG. 1(b)), and a device body A shaft-shaped measuring probe 2 extending upward from the upper end of the portion 6 and a cap 9 are provided. The device main body 6 is a portion to be gripped during measurement, and the operator holds the device main body 6 and presses the tip of the measurement probe 2 against the surface of the measurement object, thereby It becomes possible to measure vibration intensity and surface temperature. As will be described below, the device main body 6 is also a portion for performing operations such as displaying various information and inputting commands in the measuring device 1 .

An operation unit 12 and a display unit 14 are provided on the front surface of the device body 6 . The display unit 14 displays various information such as measurement results (vibration intensity, surface temperature) and diagnosis results of a diagnostic device based on the measurement results, and is composed of, for example, a liquid crystal display (LCD).

The operation unit 12 is provided below the display unit 14 . The operation unit 12 is provided with a plurality of operation switches each configured by a membrane switch or a mechanical switch. For example, a power switch 12a for turning on/off the power, a scroll switch 12b for sending/returning data display, and a plurality of command switches 12c for executing various commands are provided.

A controller is provided inside the device body 6 . A circuit board 8 constituting a controller is mounted with a microprocessor including a CPU, RAM, ROM, etc., peripheral circuits for realizing various functions, and the like. The controller (circuit board 8) has a function of displaying the measurement result on the display unit 14 and wirelessly transmitting the measurement result to the diagnostic device. It also has a function of receiving diagnostic results transmitted from the diagnostic device and displaying the diagnostic results on the display unit 14 .

A battery housing portion that can be opened and closed by a cover member 44 is provided on the back surface of the device main body 6. In this example, as a power source for driving the measuring device 1, for example, a AA dry battery 60 (primary battery) is provided. is stored removably. The cap 9 is a protective member for the measurement probe 2 formed in a hollow shape with an open bottom, and is formed to be detachably fitted on the tip portion 42c of the sleeve portion 42 described later in the case 10. there is

[Configuration of measurement probe]
2 and 3 show the measuring probe 2, with FIG. 2 showing a perspective view and FIG. 3 showing a cross-sectional view of the measuring probe 2, respectively. 2 and 3, the left side is the distal end side of the measurement probe 2. As shown in FIG.

The measurement probe 2 includes a vibration probe 3 for measuring the vibration intensity of the object to be measured, and a temperature probe 4 for measuring the surface temperature of the object to be measured.

The vibration probe 3 includes a vibration probe main body 20 to which vibration from the object to be measured is input, and a vibration sensor 26 that outputs a signal according to the vibration intensity input to the vibration probe main body 20 .

The vibration probe main body 20 includes a vibration input portion 22 made of a metal pipe having an annular cross section extending in the vertical direction (horizontal direction in FIG. 3), specifically a pipe made of stainless steel, and a lower end (base) of the vibration input portion 22. and a pedestal portion 24 connected to the end portion).

The pedestal portion 24 is a stepped metal body including a lower step portion 24a, a middle step portion 24b, and an upper step portion 24c in order from the device main body portion 6 side (the right side in FIG. 3), and is made of the same metal material as the vibration input portion 22. The lower step portion 24a, the middle step portion 24b, and the upper step portion 24c are integrally formed of (stainless steel). The lower part 24a has a rectangular parallelepiped shape that is flattened in the vertical direction. Both the middle step portion 24b and the upper step portion 24c are cylindrical, and the diameter of the upper step portion 24c is set smaller than that of the middle step portion 24b. The outer diameter of the intermediate step portion 24b is set to be equal to or slightly smaller than the inner diameter of the vibration input portion 22, and the outer diameter of the upper step portion 24c is set to be equal to or smaller than the inner diameter of the housing 30 described later on the temperature probe 4. is set slightly smaller.

The vibration input portion 22 (metal pipe) is fitted onto the middle portion 24b of the pedestal portion 24, and is fixed to the pedestal portion 24 with screws B2 while being abutted against the upper surface of the lower portion 24a. As a result, the vibration probe main body 20 having a cylindrical vibration input portion 22 at its tip is configured.

The vibration sensor 26 is composed of a piezoelectric acceleration sensor using piezoelectric ceramic as a piezoelectric element. The vibration sensor 26, as shown in FIG. 3, is arranged on the lower surface of the pedestal 24 and fixed to the central portion thereof with a screw B1. The vibration sensor 26 is provided with two connection wirings 27 including a signal output line, and is connected to the circuit board 8 via the connection wirings 27 and connectors 28 and 29 which will be described later. Thus, when vibration is input to the vibration probe main body 20, an electric signal (analog signal) corresponding to the vibration intensity is output from the vibration sensor 26 to the controller (circuit board 8).

The controller (circuit board 8) includes an A/D conversion unit for converting an analog signal input from the vibration sensor 26 via the connection wiring 27 into a digital signal, and an amplitude converter for the A/D converted digital signal. , an integral value calculator that calculates the integral value of the signal in a predetermined frequency range, and the integral value calculated by the integral value calculator to calculate the vibration intensity of the object to be measured. and a vibration intensity calculator.

The temperature probe 4 is arranged inside the vibration input section 22 of the vibration probe body 20 , more specifically, at the center of the vibration input section 22 . The temperature probe 4 includes a cylindrical housing 30 extending in the axial direction along the vibration input portion 22, a contact plate 34 disposed at the tip of the housing 30 so as to be retractable, and an elastic contact plate 34 in the projecting direction. thermocouples 32 arranged in the space inside the housing 30; and a holding member holding the thermocouples 32 inside the housing 30. The housing 30 and contact plate 34 are made of metal material.

The housing 30 is fitted onto the upper portion 24c of the pedestal portion 24 and is fixed to the pedestal portion 24 from the outside with screws B3 while being abutted against the upper surface of the middle step portion 24b. As a result, the temperature probe 4 is integrally attached to the central portion of the vibration input portion 22 with a certain gap S between the temperature probe 4 and the inner peripheral surface of the vibration input portion 22 .

As shown in FIG. 3, the distal end of the housing 30 and the distal end of the vibration input portion 22 are flush with each other, and the contact plate 34 moves between the housing 30 and the vibration input portion 22 by the biasing force of the biasing member. It is arranged at a position slightly projecting upward (to the left in FIG. 3) from the end face. As a result, when the tip of the vibration probe 3 contacts the measurement surface, the contact plate 34 is pushed back against the biasing force of the biasing member, and as a result, the contact plate 34 comes into close contact with the measurement surface. It is configured.

The thermocouple 32 includes two thermocouple wires 32a and 32b made of metal wires of different materials. For example, one thermocouple wire 32a is made of chromel wire, and the other thermocouple wire 32b is made of alumel wire. Each thermocouple wire 32a is covered with a covering material such as glass fiber or fluororesin.

One end (tip) of each thermocouple wire 32a, 32b is welded to the center of the lower surface (the right surface in FIG. 3) of the contact plate 34 (reference numeral 33 indicates the welded portion). Thus, the contact plate 34 constitutes a temperature measuring junction of the thermocouple 32 . As described above, the temperature probe 4 is arranged at the center of the vibration input section 22, so the temperature measuring junction of the thermocouple 32 is located at the center of the vibration input section 22, that is, on the axis of the vibration probe 3. To position.

As shown in FIG. 3, each thermocouple wire 32a, 32b is routed along the housing 30. As shown in FIG. The other ends of the thermocouple wires 32a and 32b are led out of the vibration probe 3 through a slit-shaped groove portion 25 formed in the base portion 24, and through connectors 36 and 37 described later, a controller (circuit board 8) is connected to the temperature measurement circuit.

[Specific Configuration of Vibration Probe 3]
When the vibration is measured in a measurement object such as a steam trap through which either steam or condensate (drain) flows, the vibration of a specific frequency component depends on whether the fluid flowing through the inspection object is steam or not. By examining the vibration intensity, which differs greatly in intensity, especially around 10 kHz, it is possible to determine with relatively high accuracy whether or not the fluid flowing through the inspection object is steam (Japanese Patent Application Laid-Open No. 2016-11904).

Therefore, the vibration probe 3 used for diagnosing a steam leak in a steam trap or the like must be configured so as to be able to accurately measure the vibration intensity in the vicinity of 10 kHz. We have found that it is important to set each value of the vibration probe 3 shown in FIG. 3 so as to satisfy the following relational expression (1).
f=C×(D/L1) (Formula 1)
In the above relational expression, f is the resonance frequency, C is the vibration acceleration of the constituent material, L1 is the total length of the vibration probe main body 20, and D is the outer diameter of the vibration input portion 22.

Further, as a result of extensive studies, the inventors of the present application have found that, as shown in FIG. We have found that the relational expression 1 can be modified as follows. The shape factor β is a value set according to the ratio of the length L2 of the hollow portion to the length L1.
f=C×((D−d)/L1)×β (Formula 2)
Therefore, in the present embodiment, when the vibration input portion 22 is made of stainless steel, the resonance frequency is around 10 kHz while ensuring the balance between the reduction in diameter and the strength based on the above relational expression 2. , values L1, L2, D, and d of the vibration probe 3 are set.

If the vibration input portion 22 is made of a metal material other than stainless steel, the value of C will be different. be able to.

[Built-in structure of measurement probe 2 and circuit board 8]
As shown in FIGS. 1(a) to 1(c), the device main body 6 of the measuring device 1 has a box-shaped case 10 made of heat-resistant plastic or the like, which forms its outer shell.

The case 10 is composed of a front case portion 11a and a rear case portion 11b divided along a split line 15. As shown in FIG. These case portions 11a and 11b are fitted to each other and integrally fixed by a plurality of screws B5. Specifically, a screw B5 is inserted from the outside of the rear case portion 11b into a through hole (not shown) formed in the rear case portion 11b, and the screw B5 is inserted into the front case portion 11a (not shown). The front and rear case portions 11a and 11b are integrally fixed by being screwed and inserted into the screw holes.

The case 10 includes a rectangular parallelepiped case main body portion 40 that is flat in the front-rear direction, and a cylindrical portion (sleeve portion) formed integrally with the case main body portion 40 so as to protrude upward from the upper surface of the case main body portion 40. 42).

The case body portion 40 is a portion into which the circuit board 8, the display portion 14, etc. are mainly incorporated, and the sleeve portion 42 is a portion into which the measurement probe 2 is incorporated, in other words, a portion that holds the measurement probe 2. is.

The sleeve portion 42 has a three-stage structure including a proximal end portion 42a, an intermediate portion 42b and a distal end portion 42c. The distal end portion 42c is cylindrical and has an inner diameter equal to or slightly larger than the outer diameter of the measurement probe 2 (that is, the vibration input portion 22 of the vibration probe 3). The intermediate portion 42b has a rectangular cross section, and is dimensioned so that the proximal end portion of the measurement probe 2 (that is, the lower stage portion 24a of the pedestal portion 24) can be inserted. The base end portion 42a has a rectangular cross section like the intermediate portion 42b, but is formed to be slightly larger in the lateral direction than the intermediate portion 42b.

4 and 5 are plan views showing the internal structure of the measuring device 1, showing how the measuring probe 2 and the circuit board 8 are incorporated into the case 10. FIG. Note that FIG. 5 is an enlarged view of a portion surrounded by a circle frame in FIG.

As shown in the figure, the measurement probe 2 is incorporated in the case 10 with its proximal end disposed inside the sleeve portion 42 . Specifically, in a state where the pedestal portion 24 and the vibration sensor 26 of the vibration probe 3 are positioned at the intermediate portion 42b of the sleeve portion 42, and the proximal end portion of the vibration input portion 22 is positioned at the distal end portion 42c of the sleeve portion 42, A measuring probe 2 is sandwiched between the case portions 11a and 11b. Then, the screws B5 are screwed into the screw holes of the rear case portion 11b through the through holes of the front case portion 11a and through a pair of through holes 241 formed in the lower portion 24a of the pedestal portion 24. A measuring probe 2 is fixed to the case 10 .

As shown by hatching in FIG. 4 , the circuit board 8 includes a main portion 50 housed in the case body portion 40 of the case 10 and a sleeve portion 42 extending upward from the main portion 50 . and an extension 52 into which it is inserted. The main portion 50 has a substantially rectangular shape elongated in the vertical direction along the inner wall surface of the case main body portion 40 in a plan view. The extending portion 52 has a rectangular shape elongated in the left-right direction and extending upward from the central portion of the upper end of the main portion 50 in a plan view.

The circuit board 8 is also fixed to the case 10 in the same manner as the measurement probe 2 . That is, through holes 50a are formed in the left and right end portions of the extension portion 52 and the left and right end portions of the upper, lower, central portion and the lower end portion of the main portion 50, and the screw B5 is inserted into the through hole of the front case portion 11a. The circuit board 8 is screwed into the screw hole of the rear case portion 11b through the through hole 50a of the circuit board 8, so that the circuit board 8 is inserted into the case 10 while being sandwiched between the front and rear case portions 11a and 11b. Fixed.

A connector 29, a 37 are provided adjacent to each other in the left-right direction. Wiring side connectors 28 and 36 provided on the measurement probe 2 are connected to these connectors 29 and 37 .

More specifically, a wiring-side connector 28 attached to the terminal end of the connection wiring 27 of the vibration sensor 26 is connected to a board-side connector 29 mounted on the circuit board 8, and the thermocouple wire 32a of the temperature probe 4 is connected to the board-side connector 29 mounted on the circuit board 8. , 32b are connected to board-side connectors 37 mounted on the circuit board 8. FIG. Thereby, the vibration sensor 26 (vibration probe 3 ) is electrically connected to the vibration intensity measuring circuit on the circuit board 8 , and the temperature probe 4 is electrically connected to the temperature measuring circuit on the circuit board 8 . The vibration intensity measurement circuit is a circuit including the A/D conversion section, signal amplification section, integral value calculation section, vibration strength calculation section, and the like.

[Effects, etc.]
According to the measuring device 1 of the above-described embodiment, the measuring probe 2 is held by the sleeve portion 42 projecting from the case body portion 40, so that the case body portion The dimension of the shaft-like portion from the end surface (upper surface) of 40 to the tip of the measurement probe 2 can be lengthened. In other words, it is possible to achieve a structure equivalent to that of an elongated vibration probe 3 without lengthening the vibration probe 3 itself. Moreover, a part of the circuit board 8 (extending portion 52) is inserted inside the sleeve portion 42, and the vibration probe 3 and the circuit board 8 are electrically connected at this extending portion 52. The distance between (vibration sensor 26 ) and circuit board 8 (extending portion 52 ) can be kept narrow, thereby suppressing noise from entering the output signal from vibration sensor 26 . Therefore, according to this measuring device 1, it becomes easy to measure the vibration intensity of the object to be measured located in a complicated place of pipes, and it is also possible to ensure high measurement accuracy.

In this case, in the measuring device 1, since the extended portion 52 is fixed to the case 10, the electrical connection between the vibration probe 3 and the circuit board 8 can be stably maintained in good condition. That is, the extension portion 52 is an unstable portion that extends from the main portion 50 of the circuit board 8 to the inner side of the sleeve portion 42 . Therefore, if the extended portion 52 is not fixed, vibrations or the like during transportation may cause stress in the connecting portion between the connector 29 and the circuit board 8, causing cracks and poor connection, for example. Conceivable. However, according to the structure of the measuring device 1, since the extension part 52 is fixed to the case 10 in a state of being sandwiched between the front and rear case parts 11a and 11b, it is stable. Therefore, the occurrence of poor connection as described above is suppressed.

In particular, the extended portion 52 has its left and right ends fixed to the case 10 (fixed portions 50a), and the wiring 27 for connection of the vibration probe 3 (vibration sensor 26) is connected to the pair of fixed portions 50a. Since it is connected to the extension portion 52 in the inner region, the electrical connection state between the vibration sensor 26 and the circuit board 8 can be maintained more stably and favorably. Therefore, it is possible to highly suppress the occurrence of connection failure as described above. This point also applies to the electrical connection state between the thermocouple wires 32 a and 32 b of the temperature probe 4 and the circuit board 8 .

[Modification]
The measuring device 1 described above is an example of a preferred embodiment of the measuring device 1 according to the present invention, and its specific configuration can be changed as appropriate without departing from the gist of the present invention.

For example, in the embodiment, the base end portion 42a of the sleeve portion 42 in the case 10 is formed to have a rectangular cross section, and the extension portion 52 of the circuit board 8 is configured to be inserted into the base end portion 42a. However, the base end portion 42a and the intermediate portion 42b may be formed in a single cylindrical shape, and the extension portion 52 may be inserted into the cylindrical shape. That is, the specific shape of the sleeve portion 42 is not limited to the embodiment, and can be changed as appropriate.

In the embodiment, the extended portion 52 of the circuit board 8 is fixed to the case 10 at both left and right ends, but is fixed at a middle portion in the left and right direction, for example, and the connectors 29 and 37 are distributed on both left and right sides. It may be a configuration in which the

Further, in the embodiment, the extension portion 52 is sandwiched between the front and rear case portions 11a and 11b and integrally fixed together with the case portions 11a and 11b with the screws B5. , it may be directly fixed to the front side case portion 11a (or the rear side case portion 11b) inside the case 10 by screws. Alternatively, the fixing means other than screws, such as a clip for fixing the substrate, may be used.

Further, in the above-described embodiment, the measuring device 1 that uses steam traps and pipes as measurement objects has been described, but the configuration of the measuring device 1 described above can also be applied to measurement objects other than steam traps and pipes. .

REFERENCE SIGNS LIST 1 measurement device 2 measurement probe 3 vibration probe 4 temperature probe 6 device main body 8 circuit board 10 case 11a front case portion 11a
11b Rear side case portion 11b
20 vibration probe main body 22 vibration input portion 24 pedestal portion 26 vibration sensor 32 thermocouple 32a thermocouple wire 32b thermocouple wire 40 case body portion 40
42 sleeve portion 42
50 main part 50
52 extension part 52

Claims (6)

A shaft-shaped vibration probe including a vibration sensor that outputs a signal corresponding to the vibration intensity of the object to be measured;
a circuit board for processing the signal;
a case in which the vibration probe and the circuit board are incorporated,
The case includes a box-shaped case main body portion in which the circuit board is incorporated, and a sleeve portion that is provided so as to protrude from an end face of the case main body portion and holds the vibration probe,
The circuit board includes a main portion accommodated in the case body portion and an extension portion extending from the main portion and inserted into the sleeve portion,
The measuring device, wherein the vibration sensor is electrically connected to the extension portion. In the measuring device according to claim 1,
The measuring device, wherein the extension portion is fixed to the sleeve portion. In the measuring device according to claim 2,
Both end portions of the extension portion in an orthogonal direction orthogonal to the axial direction of the vibration probe are fixed to the case,
The measuring device, wherein the vibration sensor has a connection wire, and is electrically connected to regions of the extension portion inside the end portions through the connection wire. In the measuring device according to claim 3,
A wiring-side connector is provided at the end of the connection wiring of the vibration sensor,
A board-side connector is provided in the inner region of the extension,
A measuring device, wherein the vibration sensor is electrically connected to the circuit board by connecting the wiring-side connector to the board-side connector. In the measuring device according to claim 3 or 4 ,
Further comprising a temperature probe for detecting the surface temperature of the measurement object,
The vibration probe has a cylindrical vibration input section at its tip,
The measuring device according to claim 1, wherein the temperature probe is arranged inside the vibration input section and electrically connected to the extension section. In the measuring device according to claim 5,
Both ends of the extended portion are fixed to the case,
The measuring device, wherein the temperature probe has a connection wire, and is electrically connected to a region of the extension portion inside the end portions through the connection wire. .

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