JP2011095118A - Hammer-mounted microphone - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a low-cost and highly versatile hammer-mounted microphone with improved working efficiency. <P>SOLUTION: The hammer-mounted microphone capable of being mounted on an impact hammer for measuring a response impact sound from a concrete structure in response to impact power, includes: a microphone 2 for measuring the response impact sound; a belt-like tape 3 having the microphone 2 attached to the inner surface, a plurality of openings 4, 4, ... at positions corresponding to the attachment position, and mechanical joining-type fastening tapes 5, 5 at both ends, and designed to be wrapped around and attached to the outer periphery of the impact hammer 10; and a cushion material 6 covering the microphone 2. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a hammer mounting microphone that can be mounted on a hammer that is used when measuring a response hammering sound of a concrete structure to a hammering force.

  Conventionally, a so-called hammering test has been performed in soundness diagnosis of concrete structures. In this hammering inspection, the inspection object is hit with a small hammer for inspection, and the person who is the inspector listens to the `` sound '' generated at that time, and the soundness of the structure to be inspected is determined based on the experience of the inspector. It is a method of evaluating. However, since this method does not record the measurement data of the hitting sound, the objectivity of soundness judgment may be questioned.

  For this reason, a method called a percussion method is known as a test method for objectively evaluating the soundness of a concrete structure. As disclosed in Patent Document 1 below, the sound-striking method generates a vibration by striking a concrete surface with striking means, and a striking sound propagated through the concrete by a microphone disposed at a position away from the striking position. In this method, sound (vibration) is collected as air vibration and converted into an electrical signal, and the soundness of concrete is determined by analyzing the signal.

JP 2001-31724 A

  However, in the test method described in Patent Document 1, it takes time and labor to install a microphone at a predetermined position. In addition, since hammering is performed by a human hand, the relative position between the hammering point and the response measurement point by the microphone is different for each impact and is not in a fixed distance relationship. There was a problem that the influence of the route was mixed.

  In addition, while holding the microphone with one hand, the work is to hit the concrete surface with a hammer with the other hand, so both hands are blocked during the inspection. In some cases, at least two inspectors who operate the measuring device main body and the inspector are required. In addition, if the relative position between the hammer hit point and the microphone response measurement point is different for each measurement, the analysis results will be affected. Therefore, it is necessary to pay sufficient attention to the installation of the microphone, reducing work efficiency. There was also a problem of doing.

  In view of the above-mentioned problems, the present applicant has proposed a batting hammer in which a microphone is embedded in advance in the batting hammer in Japanese Patent Application No. 2009-121905.

  In this case, the relative position between the hammer hit point and the microphone response measurement point is always a constant distance, and the analysis result becomes stable, and one inspector can easily work. Come to have advantages. However, the production cost of the hammer becomes expensive, and problems such as the inability to use the hammer that the worker is familiar with usually occur, and the versatility is lacking.

  Accordingly, a main object of the present invention is to provide a microphone for mounting a hammer that is inexpensive and versatile, while improving work efficiency.

In order to solve the above-mentioned problems, the present invention according to claim 1 is a hammer mounting microphone that can be mounted on a hammer for measuring the response hammering sound of a concrete structure against the hammering force,
The microphone for measuring the response hitting sound, the microphone is attached to the inner surface side, a large number of holes are provided corresponding to the attachment position, and mechanically joined fastening tape is provided at both ends, There is provided a microphone for mounting a hammer characterized by comprising a strip-shaped tape that can be mounted so as to be wound around an outer periphery of the hammer and a cushion material that covers the microphone.

  In the first aspect of the present invention, the microphone for measuring the response sound and the microphone are attached to the inner surface side, and a large number of holes are provided corresponding to the attachment positions, and both ends are mechanical. A belt-type tape provided with a joining type fastening tape, which can be attached to be wound around the outer circumference of the hammer, and a cushion material covering the microphone.

  Therefore, it is possible to manufacture at a low cost, and since it becomes possible to attach a microphone to an arbitrary hammer without regard to the type, workers can easily attach a microphone to a hammer that they are familiar with, It will be versatile. In addition, since the microphone is attached to the hammer, the relative position between the strike point and the response sound measurement point is always constant, the analysis result can be stabilized, and a single inspector can easily perform diagnostic work. Will be able to do.

  In addition, the response sound is captured by the microphone through a number of apertures formed in the strip tape, and the cushion material is interposed between the hammer and the microphone so that the impact force at the time of impact is directly applied to the microphone. Since a buffer function that prevents transmission is provided, it is possible to capture the response sound firmly while preventing noise generation and deterioration due to impact.

  According to a second aspect of the present invention, there is provided the hammer mounting microphone according to the first aspect, wherein a windshield screen is provided on the outer surface side of the belt-like tape in correspondence with the position of the microphone.

  According to the second aspect of the present invention, in order to suppress noise caused by wind of the microphone, a windscreen is provided on the outer surface side of the belt-like tape corresponding to the position of the microphone.

  According to a third aspect of the present invention, there is provided the microphone for mounting a hammer according to any one of the first and second aspects, wherein an identification mark capable of identifying the position of the microphone is displayed on the outer surface side of the strip-shaped tape. Provided.

  In the invention according to the third aspect, the position of the microphone can be identified on the outer surface side of the belt-like tape so that the direction of the diaphragm surface of the microphone can be easily confirmed with respect to the striking direction. A unique identification mark is displayed.

  As described in detail above, according to the present invention, it is possible to provide a hammer mounting microphone that is inexpensive and has improved work efficiency, and that is inexpensive and versatile.

1 shows a microphone mounting structure 1 according to the present invention, in which (A) is a plan view and (B) is a side view. It is a side view of the hammering hammer 10 in a state where a microphone is mounted.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  The microphone 1 for mounting a hammer according to the present invention is configured such that a microphone can be mounted on a hammering hammer 10 for measuring a response hammering sound of a concrete structure with respect to a hammering force.

  As shown in FIG. 1, the hammer mounting microphone 1 includes a microphone 2 for measuring the response hitting sound of a concrete structure to a striking force, and the microphone 2 attached to the inner surface side, and at the mounting position. Correspondingly, a large number of apertures 4, 4 ... penetrating to the outer surface side are provided, and mechanically joined fastening tapes 5, 5 are provided at both ends so that they can be wound around and mounted on the outer periphery of the hammering hammer 10. It is mainly composed of a strip-shaped tape 3 and a cushion material 6 that covers the microphone 2.

  Hereinafter, each member will be described in more detail.

  As shown in FIG. 2, the hammering hammer 10 includes a hammerhead portion 11 having a striking surface 11 a that strikes the surface of a concrete structure, a grip portion 13 held by an inspector at the time of hammering, and the hammerhead portion. 11 and a shaft portion 12 for connecting the grip portion 13 to each other. The hitting hammer 10 may be a hitting hammer for soundness diagnosis with a built-in accelerometer for measuring the hitting force acting on the hitting hammer, or a general tool hammer.

  The microphone 2 is attached to the inner surface side of the belt-like tape 3 so that the surface direction of the diaphragm surface for detecting the hitting sound is on the belt-like tape 3 side. The microphone 2 is thin, and is 10 mm or less, preferably 5 mm or less. The microphone 2 is connected to an electric cord 2a for transmitting a measured sound signal to an input amplifier or the like, and the electric cord 2a is fixed to the striking hammer 10 at an appropriate position by an adhesive tape or the like.

  The belt-like tape 3 is a belt-like tape material made of a cloth such as cotton, a sheet material such as polyethylene, polypropylene, and nylon. The length is 100 to 200 mm, the width is 10 to 20 mm, the thickness is about 1 mm, and it is made of a flexible material that can be easily deformed. In addition, it is preferable to use the belt-like tape 2 having a slight stretchability in the longitudinal direction because the fixed state is maintained by the contraction action when being mounted on the hammer.

  Further, the strip-shaped tape 3 is provided with a large number of apertures 4, 4... Penetrating in the thickness direction corresponding to the mounting position of the microphone 2. The apertures 4 are formed to cause the response sound to be captured by the microphone 2 and have a circular shape with a diameter of about 0.5 to 1.0 mm and a pitch of about 1 to 1.5 mm. preferable. The opening 4 is preferably formed over a wider range than the outer shape of the microphone 2 to be attached.

  The mechanical joining type fastening tape 5 provided at both ends of the belt-like tape 3 includes a male member 5a having a hook-like engagement piece disposed on one end side, and a loop-shaped member disposed on the other end side. It consists of a female member 5b having engaging pieces, and each engaging piece is joined to the base sheet in a protruding state. As shown in FIG. 1, each member 5 a, 5 b is male in the illustrated example so that the engagement pieces overlap with each other in a state where both ends are overlapped with the belt-like tape 3 being annular when attached to the hammering hammer 10. A mold member 5 a is provided on the inner surface side of one end portion of the strip tape 3, and a female mold member 5 b is provided on the outer surface side of the other end portion of the strip tape 3.

  The cushion member 6 is made of a sponge material such as rubber or resin, and is disposed so as to cover at least the surface side of the microphone 2. That is, the cushion material 6 is interposed between the hammering hammer 10 and the microphone 2 when the mounting structure 1 is mounted on the hammering hammer 10, and has a buffer function so that the hammering force is not directly transmitted to the microphone 2 at the time of the hammering. It is what you have. In the illustrated example, the microphone 2 is provided so as to extend from the central portion where the microphone 2 is attached to the positions where the fastening tapes 5 are provided at both ends. As a result, the cushioning function of the cushion member 6 makes it difficult for the striking force of the striking hammer 10 to be transmitted directly to the microphone, and the problem that noise occurs or deteriorates in the microphone 2 due to the impact caused by the striking can be solved.

  Moreover, it is preferable to provide a windshield screen 7 on the outer surface side of the strip-shaped tape 3 corresponding to the position where the microphone 2 is disposed. The windshield 7 is made of a urethane sponge material, and is preferably provided in a range that completely covers the formation region of the holes 4, 4.

  Furthermore, it is preferable that an identification mark (not shown) that can identify the position of the microphone 2 is displayed on the outer surface side of the belt-like tape 3. Thereby, it becomes easy to visually confirm the mounting direction of the microphone 2 with respect to the striking direction.

  In order to attach the microphone mounting structure 1 having the above structure to the striking hammer 10, a strip-shaped tape with the mounting direction of the microphone 2 positioned in the vicinity of the hammer head portion 11 with respect to the shaft portion 12 of the striking hammer 10. 3 are wound around the outer periphery of the shaft portion 12 and the fastening tapes 5 and 5 are overlapped and fixed. Thereafter, the electric cord 2a of the microphone 2 is fixed to the hammer, and the mounting of the microphone is completed.

  At this time, the microphone 2 can be attached in any direction such that the surface direction of the diaphragm surface of the microphone 2 is attached perpendicularly to the striking direction (see FIG. 2) or attached in parallel. It is possible to attach to.

  DESCRIPTION OF SYMBOLS 1 ... Microphone for hammer mounting, 2 ... Microphone, 3 ... Band-shaped tape, 4 ... Opening hole, 5 ... Fastening tape, 6 ... Cushion material, 7 ... Windshield screen, 10 ... Blow hammer, 11 ... Hammer head part, 12 ... Shaft Part, 13 ... grip part

Claims (3)

A hammer mounting microphone capable of being mounted on a hammer for measuring the response hammering sound of a concrete structure to a hammering force,
The microphone for measuring the response hitting sound, the microphone is attached to the inner surface side, a large number of holes are provided corresponding to the attachment position, and mechanically joined fastening tape is provided at both ends, A hammer mounting microphone comprising a strip-shaped tape that can be mounted to be wound around an outer periphery of the hammer and a cushion material that covers the microphone.   The hammer mounting microphone according to claim 1, wherein a windscreen is provided on an outer surface side of the belt-like tape in correspondence with a position where the microphone is disposed.   The microphone for mounting a hammer according to any one of claims 1 and 2, wherein an identification mark capable of identifying an arrangement position of the microphone is displayed on an outer surface side of the strip-shaped tape.

Images