JP2001241973A - Impact recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an impact recorder which detects the deviation of the impact recorder when the impact recorder is deviated from an object, measures and records a time when the recorder is deviated from the object, and judges the reliability of the record for acceleration that is measured and recorded even when the recorder is deviated from the object, and herewith can record unauthorized handling to the recorder. SOLUTION: The impact recorder measures the acceleration that the object is exerted by various kinds of operation to record, where an optical sensor is built and light quantity is measured by the sensor and both of the acceleration measured and light quantity measured are recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an impact recorder for measuring and recording an acceleration applied to an article by various operations.

[0002]

2. Description of the Related Art When an article is handled or transported, the article may be damaged by an impact due to a drop, collision, or bounce. When damaged, it is necessary to clarify at what point of impact, such as during handling and transportation, the damage. Since an item is subject to acceleration when subjected to an impact, measuring and recording the acceleration in chronological order makes it clear at which point of impact during handling and transport, it is possible to grasp the cause of damage. it can. Such an impact recorder (acceleration recorder) is used by being attached to an article, receiving the same handling and transportation as the article, measuring the generated acceleration, recording, handling, transporting, and then storing it in the impact recorder. Read the stored records to determine the impact that the item may have received. A personal computer or the like is used for reading the record.

[0003] For example, the impact detector of Japanese Patent No. 2666926 senses physical variables of physical changes that an article undergoes during handling operations such as packaging and shipping, and satisfies predetermined criteria. In an acceleration detecting method for recording a time history portion of the sensed physical variable, (a)
An acceleration in a range of ± 256 g due to a physical change in the X, Y, and Z axis directions is detected, and 0 corresponding to the detected acceleration is detected.
A program that stores an acceleration detection means, a clock means, a storage means, a communication means, a microprocessor means, and a power supply for outputting an electric signal in a range of from 5.12 volts to a housing, and constitutes an instruction to the microprocessor means. The acceleration is detected under the control of (1) and quantified, and the detected and quantified acceleration and the time when the acceleration is detected are stored in the storage unit, and the acceleration is detected by the acceleration detection unit. Attaching the housing to the article such that the applied acceleration is physically approximately equal to the article, and (b) subjecting the article to a handling operation such that the housing receives the same acceleration as the article; (C) detecting the acceleration exerted by the housing, and (d) detecting the acceleration that satisfies the predetermined criteria. Storing each time interval over time in said storage means, wherein said time interval is of a predetermined duration, and each said duration initially starts with an acceleration that satisfies said criterion; And
(E) The stored acceleration is read out from the storage means to a device outside the housing, and thereby, while the article is being handled, the magnitude of the acceleration, its occurrence time and occurrence frequency are determined by the article handling. Acceleration measurement method determined after execution. An acceleration detection / recording device that can be stored in the housing, wherein acceleration detection means for detecting acceleration due to a physical change in the X, Y, and Z directions and generating a quantified digital signal of the detected acceleration; Storage means for storing program instructions and data representing the digital signal; communication means for communicating with the separator by the digital information; and the acceleration detection means, clock means, storage means and communication means To read and execute the program instruction from the storage means, and to store the digital signal generated by the acceleration detection means and the storage means in the storage means during a time interval of a predetermined duration. Data representing both a digital timer signal generated by the clock means at the beginning of the duration Microprocessor means for controlling said communication means to start said time interval when at least one of said accelerations meets a predetermined criterion and to communicate with said separator by said digital information. The acceleration detection recording device provided with. Etc. are described.

In the shock storage unit disclosed in Japanese Patent No. 2719580, a processing module box having a built-in operation storage means for calculating and storing shock information from a shock detection signal and a sensor module box having a built-in shock sensor are separated. And a shock storage unit configured to supply a shock detection signal obtained from the sensor module box to the processing module box via a signal transmission medium, wherein the shock detection signal is an electric signal as the signal transmission medium. Using a signal transmission cable that transmits as
The signal transmission cable is connected to one or both of the sensor module box and the processing module box via a detachable connector, and further converts a shock wave signal output from the shock sensor into a voltage or current signal in the sensor module box. A signal converter for amplifying is built in, and a battery for supplying power to the arithmetic storage means is built in the other processing module box, and the power of the battery is supplied to the signal converter in the sensor module box through the signal transmission cable. A shock memory unit characterized in that the shock memory unit is designed to be used. Is described.

[0005] Further, the shock data recording method and the shock data recording card for dropping a conveyed product disclosed in Japanese Patent Application Laid-Open No. 8-62240 collect and record the shock data received by the transported luggage L during transportation. A shock data recording card for detecting and storing a shock on the baggage L and transporting the card. After the transportation, the shock data recording card is loaded into a data display device to transfer the shock data. A method of recording impact data such as a drop of a transported product, characterized by obtaining a graph. In a housing formed in a card shape having a predetermined shape and a predetermined thickness, such as a rectangular shape, a small and thin impact detection sensor and an impact history recording means for storing a gravitational acceleration G value by its output in relation to time are provided. A card for recording impact data, comprising: The G value memory is normally a memory for a fixed time, such as every minute, and stores a G value and a time in real time when a large G value of a predetermined value or more such as 10 G or more is input. An impact data recording card, characterized in that: And so on.

[0006] When these impact recorders are used, they are attached to a target article or packed together with the target article. Since it is desirable that the acceleration to be recorded is the acceleration that would have been received by the item, a mounting method and a packing method that are in close contact with the item and that do not come off even when an impact is applied are required.

However, the measured and recorded acceleration needs to be read out after transportation, and when the transportation of the goods is completed,
The mounting method must be removable so that it can be used again after being attached to another item.

Conventionally, screwing and the like are often used for such an attaching method, and a method of sticking to an article that cannot be screwed is used. In other words, it is an attachment method that can be easily attached and detached without using a special material.

Therefore, there is a high possibility that the impact recorder may be detached from the article while the article is being transported. In addition, since it is an installation method that can be easily attached and detached, the impact recorder is removed from the item before transportation, the impact recorder is attached to the item again after transportation, and the impact is applied to the item during transportation. It is also possible to fraudulently forge records so that they do not exist.

[0010]

In the conventional measurement and recording of only acceleration, there is no means for detecting the above-mentioned impact recorder coming off the article when the impact recorder comes off the article, and the impact recorder comes off the article at any time. I don't know. Therefore, if the impact recorder is removed from the item after transportation, the measured and recorded acceleration will be the acceleration when the impact recorder is properly attached to the item, and the acceleration will be removed from the item. And the acceleration after it is mixed, the acceleration when the shock recorder is attached to the item in a normal state loses the reliability, and all the measured and recorded accelerations are wasted I will.

Further, even if the impact recorder is incorrectly removed and attached, there is no means for detecting the fact.
I do not know that the impact recorder was removed. Therefore, measurement,
It is indistinguishable whether the recorded acceleration was fraudulently fabricated or obtained by normal transport.

The present invention solves the above problems, detects when the impact recorder comes off the article, measures and records when the impact recorder comes off the article, and removes the impact recorder from the article. However, it is possible to provide an impact recorder that can determine whether the measured and recorded acceleration is a reliable record and that can record improper handling of the impact recorder.

[0013]

SUMMARY OF THE INVENTION In an impact recorder for measuring and recording an acceleration applied to an article by various operations, an impact recorder having a built-in optical sensor is provided.

An impact recorder for measuring and recording the acceleration applied to an article by various operations incorporates an optical sensor, measures the amount of light with the optical sensor, and records both the measured acceleration and the measured amount of light. Use as an impact recorder.

[0015]

FIG. 1 is a block diagram illustrating the present invention. The shock recorder comprises an acceleration sensor unit 11, an optical sensor unit 12, a processing circuit unit 13, and a power supply unit 14, and can measure and record with a single shock recorder. The acceleration sensor unit 11 includes an acceleration sensor and a detection circuit, the optical sensor unit 12 includes an optical sensor and a detection circuit, and the power supply unit 14 includes a battery. The processing circuit unit 13 includes an AD conversion unit, a recording unit, a communication unit, and the like, and details will be described in the following embodiments.

FIG. 2 is a block diagram showing a first embodiment of the present invention. The acceleration detected by the sensor unit 11 that detects the acceleration is converted into a voltage and input to the AD conversion unit 21. The AD converter 21 converts the input voltage into a digital signal and outputs the digital signal to the CPU 22. The CPU 22 captures the converted digital signal, that is, the acceleration data, and records it in the recording unit 23. Optical sensor unit 12 for detecting light intensity
Similarly, the light amount detected by the A / D converter is converted into a voltage,
Is input to The AD converter 21 converts the input voltage into a digital signal and outputs the digital signal to the CPU 22. CPU 22
Captures the converted digital signal, that is, the light amount data, and records it in the recording unit 23 together with the acceleration data. The acceleration data and the light amount data recorded in the recording unit 23 are read from the communication unit 24 as necessary. The communication unit 24 is capable of transmitting data as well as receiving data, and can receive conditions to be recorded in the recording unit 23, such as time conditions, and setting information of the main body of the shock recorder, such as clock setting information. The CPU 22 operates the shock recorder according to the received recording conditions and the setting information of the shock recorder main body.

FIG. 3 is an external view of the first embodiment of the present invention. The functions of the block diagram in FIG. 2 are all incorporated in the main body 31 of the impact recorder. Holes are formed in each surface (six surfaces) of the impact recorder main body 31, and an optical sensor 32 is arranged in each hole. The amounts of light obtained from the optical sensors 32 disposed in the holes are converted into voltages, and are recorded in the recording unit 23 for each location of the optical sensors 32. For explanation,
The optical sensor attached to the lower surface is the optical sensor 1, the optical sensor attached to the upper surface is the optical sensor 2, and the optical sensors attached to the side surfaces are the optical sensors 3, 4, 5,.
6 is assumed.

FIG. 4 is a diagram showing a state of attachment to an article to be transported according to the first embodiment of the present invention. The impact recorder main body 31 is attached with a screw 42 so that the lower surface of the impact recorder main body 31 is in close contact with the article 41.

FIG. 5 is a time-series graph of acceleration data and light amount data obtained after being mounted and transported according to FIG. 4 in the first embodiment of the present invention. The light amount data is data of the optical sensor 1 (lower surface).

If the shock recorder main body 31 is normally attached to the article 41, the light does not hit the optical sensor 1, so that the light quantity data is at a level close to zero. However, if the screw 42 is loosened, the main body 31 of the strike recorder and the article 41 do not come into close contact with each other, the light hits the optical sensor 1, and the light amount data gradually increases. Therefore, by looking at the light amount data, it is possible to infer a change in the attachment state between the impact recorder main body 31 and the article 41.

In the graph of FIG. 5, there is no change in the light amount data at the first portion, and the light amount data changes at a level close to zero. However, from a certain point (point A), the light amount data gradually increases. From this fact, it can be seen that the screw 42 is gradually loosened from the point A, and the shock absorber main body 31 and the article 41 are not properly attached. Accompanying this, the acceleration data also shows a large value, but since point A, the shock absorber main body 31 and the article 41 are not in a properly mounted state, and are not reliable data. However, the data before the point A indicates that there is no abnormality in the mounting state of the impactor body 31 and the article 41,
It is reliable data.

FIG. 6 is a time-series graph of acceleration data and light amount data obtained after being mounted and transported according to FIG. 4 in the first embodiment of the present invention.

In the graph of FIG. 6, there is no change in the light amount data at the first portion, and the light amount data changes at a level close to zero. However, at a certain point (point C), the light amount data is rapidly increasing. Further, at a certain point (point D), the light amount data suddenly decreases and returns to the same level close to 0 as before point C. Thus, the mounting state of the impactor body 31 and the article 41 is unlikely to suddenly change in this way, and there is almost no possibility of suddenly returning to the previous state after the change. It can be easily inferred that the state of attachment of 41 may have been changed. The data before point C and after point D are reliable data.
It is highly probable that between the points, the impactor body 31 was incorrectly removed and the acceleration data was forged.

FIG. 7 is a view showing a state of attachment to an article to be transported according to the first embodiment of the present invention. The impact recorder main body 31 is packed in an outer box 71 together with the article 41 to be transported. The impact recorder main body 31 is attached to the article 41 such that the lower surface of the impact recorder main body 31 is in close contact with the article 41.
The outer box 71 is attached and packed so that the upper surface faces the opening of the outer box 71.

FIG. 8 is a time-series graph of acceleration data and light amount data obtained after being mounted and transported according to FIG. 7 in the first embodiment of the present invention.

In the graph of FIG. 8, in the first part, there is no change in the light amount data of the optical sensors 1 and 2, and the light amount data changes at a level close to zero. However, at a certain point (point E), the light amount data of the optical sensor 2 is rapidly increasing. Also, at a certain point (F
Point), the light amount data of the optical sensor 1 is rapidly increasing.
At points H and I, the opposite change is observed. Thus, it can be inferred that the outer box 71 is unpacked at the point E, the impact recorder main body 31 is removed at the point F, and the original is restored at the points H and I.

[0027]

According to the present invention, it is possible to detect and record that the impact recorder has come off the article during transportation, and to determine whether the measured and recorded acceleration is a reliable record.

Since the time when the impact recorder comes off the product during transportation can be specified, the measured and recorded acceleration is not wasted.

It is possible to specify the time at which the impact recorder and the article were improperly handled.

It is possible to prevent fraudulent fabrication of records.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating the present invention.

FIG. 2 is a block diagram showing a first embodiment of the present invention.

FIG. 3 is an external view of the first embodiment.

FIG. 4 is a mounting state diagram of the first embodiment of the present invention.

FIG. 5 is a time-series graph of acceleration data and light amount data after transportation according to the first embodiment of the present invention.

FIG. 6 is a time-series graph of acceleration data and light amount data after transportation according to the first embodiment of the present invention.

FIG. 7 is a mounting state diagram of the first embodiment of the present invention.

FIG. 8 is a time-series graph of acceleration data and light amount data after transportation according to the first embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Acceleration sensor part 12 Light quantity sensor part 13 Processing circuit part 14 Power supply part 21 AD conversion part 22 CPU 23 Recording part 24 Communication part 31 Shock recorder main body 32 Optical sensor 41 Article 42 Screw 71 Outer box

Claims (2)

[Claims] 1. An impact recorder for measuring and recording an acceleration applied to an article by various operations, wherein the impact recorder has a built-in optical sensor. 2. An impact recorder for measuring and recording acceleration applied to an article by various operations, wherein a light quantity is measured by an optical sensor, and both the measured acceleration and the measured light quantity are recorded. The impact recorder according to claim 1.