JPH01219555A - Impact tester - Google Patents

Abstract

PURPOSE:To facilitate handling, to make the output of a sensor constant, and to take an accurate measurement by proving an exciter and a sensor part successively in a casing and allowing the sensor to receive vibrations applied to a body to be measured by the exciter through a point contactor. CONSTITUTION:The exciter 10 has a solenoid 2 and an iron core 3 in the casing 1, a driving case 5 is provided, and the contactor 9 for striking is fitted to the center part of its reverse surface. The case 5 is lowered by a contact pressure spring 7 to make a contactor 9 contact the body 6 to be measured. The sensor part 17 is constituted by supporting a sensor (piezoelectric element) 13 on the edge part of a rubber ring 12 fixed to a support part 11 fitted on the reverse surface of the casing 1 and providing the point contactor 14 to the center part of its reverse surface. The contactor 14 comes into point contact with the body 6 to be measured with a sensor pressing spring 16. When the solenoid 2 is fed with electricity, the iron core 3 moves down to strike the body 6 to be measured through the contactor 9. Consequently, the generated vibration of the body 6 to be measured is received by the sensor 13 through the contactor 14 and transduced into an electric signal. The extent of separation of the body 6 to be measured is detected with the output of the sensor 13.

Description

[Detailed Description of the Invention] [Industrial Application Field] In aging concrete buildings, the finishing layer on the surface of the building may peel off from the concrete surface, damaging the appearance, or
It may cause water leakage or fall, causing harm to the surrounding area.

The present invention relates to an impact tester for testing the degree of peeling of finishing layers such as mortar, tiles, etc. or aluminum sash on the surface of such concrete buildings, the degree of filling in the chisel, and the degree of vacuum.

[Conventional technology]

In a method for inspecting the lifting of the finishing layer of a concrete building whose surface is finished with mortar, tiles, etc., the present applicant has proposed a method for inspecting the lifting of the finishing layer of a concrete building whose surface is finished with mortar, tiles, etc. Finishing of the surface of a concrete building object, characterized in that the state of floating of the finishing layer is detected by contacting the surface of the concrete building object with the sensor and detecting the state of vibration of the finishing layer caused by the impact from the vibrator. A method for detecting layer lifting has already been proposed in Japanese Patent Application No. 314072/1983.

In this conventional example, a vibrator and a sensor are brought into contact with a suitable location to be inspected, and when an impact is applied to the finished layer with the vibrator, mainly the finished layer portion vibrates in response to the impact. This vibration is detected by a sensor, but there is a difference in vibration between places where the finishing layer is in close contact with the concrete layer and places where it is floating. is large, so the state of floating can be easily detected by the amplitude detected by the sensor.

[Problem to be solved by the invention]

However, in the conventional example above, since the vibrator and sensor are separate, it is difficult to maintain a constant distance between them.
Since the vibration applied to the sensor is captured by the receiving surface of the sensor, the sensor output is not constant, making accurate measurement difficult (and the vibration exciter and sensor must be brought into contact with the object to be measured separately). However, the problem remained that it was difficult to handle.

[Summary of the invention]

The first impact tester of the present invention solves the above problems,
As shown in the first diagram, there is a vibrator 10 in a casing 1 that operates a magnetic core 3 by energizing a solenoid 2 to strike a striking contact 9 against an object to be measured 6, and an object to be measured by the striking contact 9. A sensor unit 17 is installed in parallel to receive the vibration generated by hitting the object 6 by the sensor 13 via a sensor point contact 14 that makes point contact with the object 6 and convert it into an electric signal. .

In this first impact tester, when the solenoid 2 is energized, the magnetic core 3 is activated and the striking contact 9 strikes the object 6 to be measured. Vibration generated by this tapping is transmitted to the sensor 13 via the sensor point contact 14 that makes point contact with the object to be measured 6, and is converted into an electrical signal.

There is a difference in vibration between places where the object to be measured 6 is peeled and places where it is not; the amplitude is small where the object 6 is in close contact with the object, and the vibration is large where it is peeled off. You can easily know the extent of peeling.

In this case, since the vibration is received by the sensor 13 via the sensor point contact 14 that makes point contact with the object to be measured 6, the output of the sensor 13 becomes constant, making accurate measurement easy. In addition, since the vibrator 10 and the sensor section 17 are arranged side by side in the casing 1, they can contact the object to be measured 6 at the same time.
Easier to handle.

In order to solve the same problem, the second impact tester of the present invention has a solenoid 2 in a casing 1 and a magnetic core 3 that is set to move by energization of the solenoid 2, as shown in the first diagram, and has a magnetic core 3 that moves along a slide guide 4. A drive case 5 is provided to be able to move in and out, and between the drive case 5 and the casing 1 and between the drive case 5 and the magnetic core 3, an elastic body 7 for applying contact pressure to the object to be measured 6 and a magnetic core 3 are provided, respectively. Elastic body 8 for support
A striking contactor 9 is attached to the lower surface of the drive case 5 to constitute a vibrator 10, and a support portion 11 is attached to the lower surface of the casing 1 on the side of the vibrator 10.
A sensor 13 is supported on the edge of a flexible ring 12 fixed to a The sensor section 17 is constructed by providing a sensor pressing elastic body 16 between the sensor 13 and the holding section 15 on the anti-sensor point contact 14 side in order to press the sensor 14 against the object 6 to be measured.

Since this second impact tester is the same as the first impact tester except for some parts, it will be described in detail in the detailed description of the invention.

A third impact tester of the present invention solves the same problem and processes test data, as shown in FIG.

As shown in FIG. 3, a handle 20 is attached to a casing 1 in which a vibrator 10 and a sensor section 17 are arranged side by side, and has a hand switch 19 that opens and closes two solenoid circuits, and a handle 20 that has a hand switch 19 that opens and closes two solenoid circuits, and a striking contact 9 that is activated by energizing the solenoid 2. A filter 21 that extracts a required signal from the vibration signal detected by the sensor 13 when the object to be measured 6 is hit, a peak hold circuit 22 that holds the signal obtained from the filter 21, and an output of the peak hold circuit 22. an A-D converter 24 which converts the analog signal into a digital signal by inputting the output of the level setter 23 which sets a value below a certain value to zero;
- A function to print the test data and date and time by inputting the output of the D converter 24, the date and time signal of the timer 25, and the opening/closing information of the hand switch 19, and a function to open and close the two solenoid circuits by opening and closing the hand switch 19. The configuration includes a processor 26 that functions to hold the signal of the hold circuit 22, and a printer 27 that prints test data and date and time.

In this third impact tester, when the handle 20 is gripped and the hand switch 19 is closed, the solenoid 2 is energized, the striking contact 9 strikes the object to be measured 6, and the sensor 13 obtains a vibration signal. This vibration signal is input to a filter 21, which outputs a required signal, which is input to a peak hold circuit 22 and held according to a command from a processor 26.

The output of this peak hold circuit 22 is the level setter 23.
It is input to the A-D converter 24 together with the output of , and from this, a one-pulse digital signal with values below a certain value set to zero is output. This digital signal, the date and time signal of the timer 25, and the opening/closing information of the hand switch 19 are input to the processor 26 and processed, and the printer 27 prints the test data and date and time, and cuts off the power to the solenoid 2.

The degree of peeling of the object to be measured 6 can be determined by the magnitude of the test data. When the test data is zero value, the measured object 6
It can be seen that it has not peeled off.

[Detailed description of the invention]

The present invention will be described in detail below based on the drawings.

FIG. 1 is an explanatory diagram showing the structure of a first embodiment of the impact tester of the present invention, and 1 is a casing. Inside the casing 1, a vibrator 10 and a sensor section 17 are arranged side by side.

The vibrator 10 has a solenoid 2 in a casing 1 and an iron core 3 that is moved vertically by energization of the solenoid 2, and a drive case 5 that is moved vertically along a slide rail 4. Between the drive case 5 and the casing 1 and between the drive case 5 and the iron core 3, an object to be measured, for example, a finishing layer 6 on the surface of a concrete building, is placed.
A contact pressure spring 7 and a support spring 8 for the iron core 3 are provided,
A striking contact 9 is attached to the center of the lower surface of the drive case 5.

Further, the sensor section 17 is connected to the casing 1 on the side of the vibrator 10.
A support part 11 is attached to the lower surface of the support part 11, and a sensor, for example a piezoelectric element 1, is attached to the edge of a rubber ring 12 fixed to this support part 11.
A sensor point contact 14 is provided at the center of the lower surface of the piezoelectric element 13 to make point contact with the finishing layer 6. 13 and the holding portion 15 on the anti-sensor point contact 14 side, a sensor pressing spring 16 is provided.

41 is a leg of the casing.

In the above structure, the driving case 5 is moved downward along the guide rail 4 by the contact pressure spring 7, so that the striking contact 9 is in contact with the finishing layer 6 with a predetermined pressure. on the other hand,
The sensor point contact 14 is in point contact with the finishing layer 6 by a sensor pressing spring 16.

When the solenoid 2 is energized in this state, the iron core 3 is activated and the striking contact 9 strikes the finishing layer 6.

Vibration generated by this tapping is transmitted to the piezoelectric element 13 via the sensor point contact 14 that makes point contact with the finishing layer 6, and is converted into an electrical signal.

In this case, since the piezoelectric element 13 is supported by the rubber ring 12, the rubber ring 12 causes the piezoelectric element 13 to vibrate and is passed from the vibrator 10 through the casing 1 to the piezoelectric element 13.
It plays the role of preventing vibrations transmitted to the

There is a difference in vibration between areas where the finishing layer 6 is peeled off and areas where it is not; the amplitude is small where the finishing layer 6 is in close contact, and the vibration is large where it is peeled off. The degree of peeling can be easily detected.

In this case, since the vibration is received by the piezoelectric element 13 via the sensor point contact 14 that makes point contact with the finishing layer 6, the output of the piezoelectric element 13 becomes constant, making accurate measurement easy. Furthermore, since the vibrator 10 and the sensor section 17 are arranged side by side in the casing 1, they can contact the finishing layer 6 at the same time, making handling easier.

In the first embodiment, a backing material 18 is provided on the lower surface of the piezoelectric element 13.
The piezoelectric element 13 is supported on the rubber ring 12 with this backing material 18, and the sensor point contact 14 is attached to the backing material 18.
By providing this, the piezoelectric element 13 can uniformly receive vibrations, and also serves to protect the piezoelectric element 13.

FIG. 2 is a connection diagram showing the structure of a second embodiment of the impact tester of the present invention, and FIG. 3 is a schematic perspective view thereof.

Second. In FIG. 3, the vibrator 10 and the sensor section 17 are arranged side by side in the casing 1. A handle 20 is attached to the casing 1 and has a hand switch 19 for opening and closing two solenoid circuits. 21 is the striking of the striking contact 9 to the finish N6 by energizing the solenoid 2 (Fig. 4 fa)
) is detected by the piezoelectric element 13 (see Fig. 4(
This is a filter that extracts the required signal (see FIG. 4(C)) from the signal (see FIG. 4(C)). An amplifier 30 amplifies the output of the filter 21, and outputs a signal adjusted by the sensitivity adjustment section 31. Sensitivity can be adjusted, for example, in three stages.

22 is a peak hold circuit which inputs the output of the amplifier 30, and holds the required signal (trigger pulse) shown in FIG. Reference numeral 24 inputs the output of the peak hold circuit 22 via the zero adjustment section 32, and also inputs the output of the level setter 23 which sets a value below a certain value to zero, and outputs the analog signal. It is an A-D converter that converts into a digital signal.

26 inputs the output of this A-D converter 24, the date and time signal of the timer 25, and the opening/closing information of the hand switch 19.

A function to print the test data and date and time on the printer 27, a function to open and close two solenoid circuits by opening and closing the hand switch 19, a function to hold the signal of the peak hold circuit 22, and the test data.

A function to display the date and time on the display section 28, and a reset section 2
This processor has the function of resetting test data, date and time, etc. by the reset input of 9.

33 is a level setter 23 as shown in the third diagram. printer 2
71 display section 28. Reset section 29. Sensitivity adjustment section 31° Zero adjustment section 32. Power supply voltage drop display section 34. Power switch 35. Power input terminal 36. External signal outlet 37. Sensor connection port 42. 1 of the timer 25. Second date and time adjustment section 39
, 40, etc. are set on the outer surface.

Inside this main body 33 is a filter 21. Amplifier 30. Peak hold circuit 22. A-D converter 24. A processor 26 and a timer 25 are built-in. timer 25
To set the date and time, see step 1. Second date and time adjustment section 39, 4
By pressing 0, the numbers are set in the order of seconds, 5 minutes, 1:09, January, and 5 years, together with numerical values, and are output to the display unit 28 and printer 27 through the processor 26.

The electrical connection between the casing 1 and the main body 33 is made by a cable 38.

In the above configuration, when the handle 20 is held and the striking contact 9 of the vibrator 10 and the sensor point contact 14 of the sensor unit 17 are brought into contact with the finishing layer 6 and the hand switch 19 is closed, the solenoid 2 is energized, and the striking contact 9 strikes (excites) the finishing layer 6 due to the operation of the iron core 3.
As shown in FIG. 4 (see al), vibration is generated. This vibration is transmitted to the piezoelectric element 13 via the sensor point contact 14,
An electric signal is generated by this piezoelectric element 13 (see Fig. 4 fbl).
is converted to This signal is input to the filter 21, from which a desired signal (see FIG. 4(C)) is output. This signal is transmitted to the amplifier 3 whose sensitivity has been adjusted by the sensitivity adjustment section 31.
The signal is amplified by 0 and input to the peak hold circuit 22, where it is held according to a command from the processor 26.

This held signal passes through the zero adjustment section 32^-D
The signal (analog signal) is input to the converter 24, and the output of the level setter 23 which sets a value below a certain value to zero is input, and the signal (analog signal) is converted into a digital signal. This A-Di
The output of the converter 24 and the date and time signal of the timer 25 are input to the processor 26 and processed, and the test data (the magnitude of vibration) and the date and time are printed by the printer 27 and displayed on the display section 28.

When the reset section 29 is operated, the test data and date and time stored in the memory section of the processor 26 are reset.

Therefore, by measuring the magnitude of vibration, the degree of peeling of the finishing layer 6 can be determined. When the vibration value is large, it can be determined that the degree of peeling of the finish layer 6 is large, and when the vibration value is zero, it can be determined that the finish layer 6 has not peeled off, that is, it is in close contact with the surface of the concrete building.

As is clear from the above description, according to the first impact tester of the present invention, since the vibrator 10 and the sensor section 17 are arranged side by side in the casing 1, the distance between them is constant, and the vibration Since the vibration applied to the object to be measured 6 by the device 10 is captured by the sensor point contact 14, the output of the sensor 13 is constant, which not only allows accurate measurement but also makes it easy to handle.

According to the second impact tester of the present invention, in addition to the effects of the first impact tester, the sensor 13 is supported by the flexible ring 12, so the flexible ring 12 vibrates the sensor 13 and applies Since it serves to prevent vibrations from being transmitted from the vibrator 10 to the sensor 13 via the casing 1, more accurate measurements are possible.

According to the third impact tester of the present invention, in addition to the effects of the first tester, it is possible to perform consistent processing from vibration to printing of test data and date and time.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the structure of the first embodiment of the impact tester of the present invention, Fig. 2 is a connection diagram showing the structure of the second embodiment of the impact tester of the present invention, and Fig. 3 is a schematic perspective view thereof. , Fig. 4 (al~
(C) is the second. FIG. 4 is an explanatory diagram of the operation of the second embodiment of FIG. 3; 1... Casing, 2... Solenoid, 3... Magnetic core (iron core), 4... Slide guide (rail), 5... Drive case, 6.
...Object to be measured (finishing layer), 7...Elastic body for contact pressure (spring), 8... Elastic body for support (spring), 9... Impact contact, 10... Vibrator, 11... Support part, 12... Flexible ring (rubber link), 13... Sensor (Piezoelectric element), 14...Sensor point contact, 15.
...Holding part, 16...Elastic body for sensor pressing (spring), 17...Sensor part, 18...
・・Backing material, 19・・Hand switch, 20・
・・・Handle, 21・Old・Filter, 22・・・・
...Peak hold circuit, 23...Level setter, 24...A-D converter, 25...
Timer, 26... Processor, 27...
...Printer, 28...Display section, 29...
...Reset section.

Claims (4)

[Claims] (1) A vibrator 10 inside the casing 1 that activates the magnetic core 3 by energizing the solenoid 2 to strike the striking contact 9 against the object to be measured 6; An impact tester is provided with a sensor unit 17 that receives vibrations generated by hitting by a sensor 13 via a sensor point contact 14 that makes point contact with an object 6 to be measured and converts it into an electric signal. (2) A drive case 5 that has a solenoid 2 and a magnetic core 3 that is moved by energization of the solenoid 2 and is moved along a slide guide 4 is provided in the casing 1 so as to be able to appear and retract, and the drive case 5 and the casing 1 and between the drive case 5 and the magnetic core 3, an elastic body 7 for contact pressure to the object to be measured 6 and an elastic body 8 for supporting the magnetic core 3 are provided, respectively.
A striking contact 9 is attached to the lower surface of the drive case 5 to constitute a vibrator 10, and the casing 1 on the side of the vibrator 10 is
A support part 11 is attached to the lower surface of the sensor 13, and a sensor 13 is supported on the edge of a flexible ring 12 fixed to the support part 11. A contact 14 is provided, and a sensor pressing elastic body 16 is provided between the sensor 13 and the holding portion 15 on the side opposite to the sensor point contact 14 in order to press the sensor point contact 14 against the measured object 6. An impact tester comprising a sensor section 17. (3) A backing material 18 is bonded to the lower surface of the sensor 13, the sensor 13 is supported by the flexible ring 12 with this backing material 18, and a point contact 14 for the sensor is provided on the backing material 18. Impact tester according to scope 2. (4) A handle 20 that is attached to the casing 1 in which the vibrator 10 and the sensor section 17 are arranged side by side and has a hand switch 19 that opens and closes two solenoid circuits, and the object to be measured of the striking contact 9 when the solenoid 2 is energized. Sensor 13 for hitting 6
a filter 21 that extracts a required signal from the vibration signal detected by the filter 21, a peak hold circuit 22 that holds the signal obtained from the filter 21, and a level setter that sets the output of the peak hold circuit 22 and the output below a certain value to zero. 23 and converts the analog signal into a digital signal. , a function to print test data and date and time, a function to open and close two solenoid circuits by opening and closing the hand switch 19, and a peak hold circuit 2.
Processor 2 which performs the function of holding the signal of 2.
6, and a printer 27 for printing test data and date and time.