JPH0656388B2 - Impact measuring device - Google Patents

Description

The present invention is applied to the inside or outside of a product with an adhesive tape to intentionally generate a shock condition in the laboratory which the product receives during transportation. The present invention relates to a device for detecting and displaying an impact value in each part of a product.

2. Description of the Related Art Conventionally, there is an example shown in FIG. 3 as a device for measuring an impact received on a product during transportation or in a laboratory.

In this conventional example, a shock detector 1 attached to a product
Outputs an output according to the magnitude of the shock received, amplifies this output with the amplifier 2, shapes the waveform with the filter 3, and receives the waveform-shaped signal and converts it with the absolute value converter 4. Then, the output from the absolute value converter 4 is received by the peak hold 5, the peak is held here, the peak-held output is AD-converted by the AD converter 6, and the AD-converted output is stored in the digital hold 7. In the case where the digital switch 7 is input and is input to the digital hold 7 from the display switch 8, the display 9 is displayed according to the input to the digital hold 7.
In addition, the magnitude of the shock received by the shock detector 1 is displayed. In FIG. 2, 10 is a power supply, 11 is a power switch, 12 is a voltage detection switch, 13 is a voltage detection unit, and 14 is an LED.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the case of this conventional example, since the shock detector 1 and the display unit 9 of the measured value are incorporated in the main body of one body, repeated measurement or mechanical shocks of a plurality of parts are simultaneously measured. For that purpose, it was inconvenient to reset for re-measurement and change the mounting position, and the workability was poor.

The apparatus of the present invention mounts only the shock detector on the inside or the side of the product with the adhesive tape, intentionally generates the shock in the laboratory, and measures the shock received by each part of the product at that time.

Therefore, the impact measuring device of the present invention is provided with an impact detector which is attached to an object to be measured and detects a mechanical impact received by the object to be measured and outputs an electric signal, and the impact detector. Impact measuring instrument main body having a display section for displaying the magnitude of the impact by receiving the electric signal, and a flexible lead for electrically connecting the impact measuring instrument main body and the impact detector to transmit the electrical signal It is composed of lines and lines.

Operation Since the main body of the impact measuring instrument and the impact detector are separated and connected by the lead wire, only the impact detector can be used as a product when repeating the impact test by exchanging with the product in the laboratory. Workability can be improved by mounting it.

Embodiment An impact measuring device in an embodiment of the present invention will be described with reference to FIGS. 1 and 2 of the drawings.

In FIG. 1, reference numerals 21 are shock detectors each using a piezoelectric type acceleration pickup, and are connected to a control circuit provided in a shock measuring device main body 22 by a long flexible lead wire 23. The three shock detectors 21 are in the X direction,
In order to detect a three-dimensional shock in the Y direction and the Z direction, the shock directions are shared and detected. The impact detectors 21 are attached to the object to be measured with an adhesive tape. The shock-measuring device main body 22 is provided with three display portions 24 for displaying the strength of shock on its surface.
The impact strengths in the X direction, Y direction, and Z direction are displayed respectively. Reference numeral 25 is a power switch, and 26 is a reset switch, both of which are provided on the surface of the impact measuring device main body 22.

Next, the operation will be described with reference to FIG.

When the power switch 25 is turned on and the impact measurement test is started in the laboratory, X, from the impact measuring instrument 22 attached to the product,
An electric signal corresponding to the impact value in each of the Y and Z directions is output, enters the amplifier unit 27 via the lead wire, is amplified here, and is then input to the filter unit 28. After removing unnecessary high-frequency noise by the filter unit 28, the absolute value conversion unit 29 amplifies it at a constant rate determined by the relationship between the output voltage of the acceleration pickup and the impact acceleration value.
It is guided to the peak hold unit 30. Peak hold part 3
The value of 0 is immediately sent to the analog-digital converter unit 31 and output as a digital value corresponding to the impact acceleration value. This output is sent to and held by the digital hold circuit 32, and immediately the three-dimensional impact acceleration values in the X, Y and Z directions are displayed on the display 24. That is, the impact acceleration value in the three-dimensional direction can be known at once. The reset switch 26 is used to put all the measurement circuits in a reset state.

On the other hand, 33 is a power source, and the voltage detection unit 34 constantly monitors the power source voltage, and when the power source voltage becomes a certain voltage or less, the state is displayed on a part of the display.

The power switch 25 connects or disconnects the supply of electric power to the electric circuit. As described above, three independent measurement circuit systems may be provided to enable the impact acceleration value in the three-dimensional direction to be measured at one time.

As described above, according to the present invention, as compared with the conventional electric shock measuring device, the shock detector is separated and independent from the shock measuring device main body to detect the shock to the product whose shock is to be measured. The effect of facilitating the attachment of the detector and the fact that the impact detector is small and lightweight makes it possible to perform measurement while ignoring the influence of the weight of the impact detector even in a product having relatively small penetrability. Also, since the shock detector is attached to the object to be measured with adhesive tape, its mounting position can be selected arbitrarily and can be freely attached and detached, so shock measurement can be performed while changing the measuring position of the object to be measured. It can be repeated. As a result, it is possible to provide a device having an excellent measuring function.

[Brief description of drawings]

FIG. 1 is a perspective view of an impact measuring instrument according to an embodiment of the present invention, FIG. 2 is a block circuit diagram of the impact measuring instrument, and FIG. 3 is a block circuit diagram of a conventional impact measuring instrument. 21 ... impact detector, 22 ... impact measuring device main body, 23 ...
… Lead wire, 24 …… Display section.

Claims (2)

[Claims] 1. A shock detector which is attached to an object to be measured with an adhesive tape to detect a mechanical shock received by the object to be measured and outputs an electric signal, and a magnitude of the shock when an electric signal from the shock detector is received. An impact measuring device comprising: an impact measuring device main body having a display section for displaying the height; and a flexible lead wire for electrically connecting the impact measuring device main body and the impact detector to transmit the electric signal. 2. A shock absorber main body is provided with a control device for receiving an electric signal from the shock detector and immediately displaying as a shock having a magnitude corresponding to the electric signal on a display section. The impact measuring device according to claim 1.