JP2575202B2 - Transport shockwave memory - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shock wave storage device capable of analyzing a shock wave generated during the transportation of a product and applied to the product, and accurately determining the cause thereof. The present invention relates to a shock wave storage device that stores information necessary for analysis of a shock wave, and retrieves the stored information to the outside as necessary and records it on a screen or on a recording paper.

2. Description of the Related Art As represented by Japanese Patent Application Laid-Open No. 61-66165, a shock wave generated during the transportation of a product is detected by an acceleration sensor (vibration sensor), and the shock information is stored together with a peak value and an occurrence time. A known shock wave memory is known.

Problems to be Solved by the Invention Since the shock wave storage device is used for storing shocks by attaching it to a package during transportation, it is necessary to drive the battery, but it has a short life. Batteries cannot properly respond to shock information storage during long-term transport, and the information storage capacity of the shock wave memory is limited, so the shock information required for long-term transport is efficiently stored and grasped efficiently. Had the problem that it was difficult.

This type of shock wave memory for transportation is required to meet the above-mentioned problem and to be small and lightweight with excellent mobility and portability.

The present invention has been developed to solve the above-mentioned conventional disadvantages.

Means for Solving the Problems The present invention, as a shock wave memory to solve the above problems,
A reference level setting circuit for setting a reference level of a shock wave in a transport shock wave storage device in which an information processing storage circuit for storing shock wave information detected by a vibration sensor is driven by a battery. A comparator circuit that compares the reference level with the shock wave and instructs the information processing storage circuit to take in the shock wave only when a shock wave of the reference level or more is input, and the comparator circuit stores the reference level in the information processing storage circuit equal to or more than the reference level. And a power saving circuit for supplying power to the information processing storage circuit according to the command of the comparator circuit at the same time.

According to the present invention, only the portion of the shock wave exceeding the reference level can be stored as shock information by the cooperation of the operation of the reference level setting circuit, the comparator circuit, and the power saving circuit. The power saving circuit that responds when the power exceeds
Only the necessary minimum information to be noted according to each transport condition can be efficiently stored and collected with the minimum power consumption.

Embodiment Hereinafter, the configuration of the present invention will be described with reference to the drawings showing one embodiment.

1 to 3, reference numeral 1 denotes a mounting plate having a mounting hole 2 for mounting on a transport product or a carrier, and a case 3 is fixed to the mounting plate 1. Inside the case 3 is a partition plate 4a.
The lower chamber is divided into two upper and lower chambers. The lower chamber has a power supply battery V, a power supply assurance capacitor 5 when the battery V comes out of contact with the vibration, and a vertical direction X fixed to the vibration sensor holder 6. A vibration sensor 7a, a vibration sensor 7b in the left-right direction Y,
A vibration sensor 7c in the front-rear direction Z is provided.
Reference numerals 7a ', 7b', and 7c 'are conductor connection ports provided in the respective vibration sensors 7a, 7b, and 7c.

Wiring boards 4b and 4c forming an information processing memory circuit to be described later are mounted in the upper chamber, and a start switch 8 of a shock wave memory and an indicator for confirming the operation of the shock wave memory are mounted on the wiring boards 4b and 4c. 9 and a range changeover switch 10 having a range changeover switch 10 for changing the magnitude of a shock wave to be taken from the vibration sensors 7a, 7b, 7c into multiple stages of, for example, 10G, 20G, 30G.
10 is switched to a range suitable for the transportation conditions such as road surface conditions.

Also, on the wiring boards 4b and 4c, a reference level setting knob 11 for setting a reference level (slice level) of a shock wave in each range, and a check button for checking the capacity of the power battery V
12, an indicator light 13 for displaying the capacity of the same power supply battery, a time setting dial 14 for setting the time at which the shock wave occurred, for example, year, month, day, hour, minute, and a time setting set button 15 for setting the time setting, which will be described later. A connector 16 for transmitting the stored information of the shock wave to be transmitted to an external personal computer, for example, and displaying it on a screen or recording paper; and an information transmitting button 17 operated when transmitting the stored information to, for example, the external personal computer. , An information erasing button 18 for erasing the stored information, a power switch 19, etc., and
An IC constituting a CPU such as an MPU is mounted and can be operated on the upper surface of the case 3.

FIG. 4 is a block diagram showing the circuit configuration of the present invention. In the figure, 7a, 7b, 7c are X, Y, generated during the above-described product transfer.
This shows a vibration sensor that detects vibrations in each direction of Z. These vibration sensors 7a, 7b, 7c detect vibrations in the X, Y, and Z directions individually, and these detection signals are switched by a range changeover switch 10. Amplifier set to sensitivity according to the specified range
The detection signal is amplified by the amplifier circuit 20 and rectified. The amplified and rectified output signal of the amplifier circuit 20 is supplied to the next-stage peak hold circuit 21. The peak hold circuit 21 determines and holds the peak value and the waveform width of the output signal of the amplifier circuit 20. I do.

On the other hand, the comparator circuit 23 in which the output signal of the amplifier circuit 20 is set to the reference level by the reference level setting knob 11
The shock wave corresponding to each range setting is compared with the reference level, and an output signal is transmitted only when a signal higher than the reference level is input. An instruction is given to an information processing storage circuit including a processing device (hereinafter referred to as a CPU) and the like. At the same time, the power control circuit 25 is set to an operation state for a predetermined time, for example, 0.5 sec by the output signal of the comparator circuit 23, and the power supply line 26
Is turned on. That is, one measurement process is set to, for example, 0.5 sec, and the data therein is stored as valid data. When the switching circuit 27 is turned on, the power required for the operation is supplied to the CPU 22 for the predetermined time.

The supply of the power causes the CPU 22 to be in the operation state for the predetermined time, receive the output signal of the peak hold circuit 21, and perform the processing. The information on the peak value and the waveform width of each of the X, Y, and Z directions of the shock wave processed by the CPU 22 is written into the temporary write memory 32 (SRAM) through the line 31, and the timer 33 Time information is written. The information written in the temporary writing memory 32 is stored in the writing memory 34 (EPROM).

19 is a power switch, 29 is a voltage supply line for placing the CPU 22 in an operation standby state, 30 is a release line for releasing the peak value and waveform width of the shock wave held by the peak hold 21, and 36 is the above stored In the driver receiver circuit for transmitting information in series, the output side of the driver receiver circuit 36 is connected to the connector 16 described above.

In FIG. 4, the same reference numerals as those shown in FIGS. 1 to 3 denote the same items.

Further, the processing of the detection signal of the vibration sensor of the present invention will be described based on the circuit explanatory diagram of FIG. 5 and the shock waveform explanatory diagram of FIG.

FIG. 5 shows only the vibration sensor 7a in the X direction to simplify the description. First, the detection signal of the vibration sensor 7a is the range set by the range changeover switch 10, for example, the charge amplifier circuit 20a switched to the sensitivity corresponding to 30G.
The signal a of the shock wave amplified according to the above range is output from the output side of the charge amplification circuit 20a as shown in FIG. 6A. This shock wave signal a is supplied to the absolute value amplifier circuit 20b at the next stage, and the output side of the absolute value amplifier circuit 20b outputs a rectified shock wave signal b as shown in FIG. 6B. This output signal b is supplied to a peak hold circuit 21 whose reference level is set by a reference level setting knob 11, and this peak hold circuit
As shown in FIG. 6C, an output signal c having a peak value P exceeding the reference level L and a waveform width T as shown in FIG. 6C, that is, a shock wave corresponding to each range detected by the vibration sensor. The information in the X direction, the information on the peak value, and the information on the waveform width are output to the CPU 22 in accordance with the command from the comparator circuit 23, processed and stored.

In FIG. 6C, S indicates a sampling signal at 1 ms intervals, for example. The power source uses a battery because of its portable type. In order to minimize the consumption of the battery, the above-described comparator circuit 23 and the CPU 22 are operated in the above-described predetermined time by the output signal of the comparator circuit 23 for the above-mentioned predetermined time (the above-described operation state). A power saving circuit including a power control circuit 25 and a switching circuit 27 for receiving the output of the peak hold circuit 21) is provided.

By setting the reference level arbitrarily while setting the range according to the transport condition by the range switching circuit as described above, only the necessary shock wave information can be stored. That is, the range switching circuit, the reference level setting circuit, the comparator circuit, and the power saving circuit cooperate to increase the number of information to be stored in the shock wave in each range,
By reducing the value, it is possible to select the peak value required under various transport conditions and determine the nature of the shock wave.

When actually using the shock wave storage device of the present invention, first, the power switch 19 is turned ON, the battery capacity is checked with the battery capacity check button 12, the current time is set with the time setting dial 14, and the current time setting is set with the set button 15 The range setting switch 10 is used to set the range, and the reference level setting knob 11 is used to perform each operation of setting the reference level of the comparator circuit 23 by the reference level setting circuit 11 '. For example, the start switch 8 is attached to a product to be transported or a carrier for transporting the product, and the start switch 8 is turned to the start side.

As described above, the vibration applied to the product during transportation of the product, that is, the shock wave, is detected by the vibration sensor in three directions of X, Y, and Z, and the detection signal is used as an information source to obtain information on the direction of the shock wave. Are stored as information on the peak value of the shock wave in each direction, information on the waveform width of the shock wave, information on the time of occurrence of the shock wave, and the like. After the measurement, the shock wave memory is detached from the object to be measured, and is used for analyzing the stored information. That is, in order to read out the shock wave information stored in the shock wave storage device, a personal computer or the like is connected to the connector 16 of the shock wave storage device and the information transmission button 17 is operated to send the information to the personal computer. On the screen, or take it out as recording paper from the printer and analyze the shock wave.

As described above, according to the present invention, only the portion of the shock wave exceeding the reference level can be accurately stored as shock information by the cooperation of the operation of the reference level setting circuit, the comparator circuit, and the power saving circuit. At the same time, power can be saved by the action of a power saving circuit that responds when the above shock wave exceeds the reference level, and only the necessary minimum information to be focused on according to each transport condition can be used with the minimum power consumption. Can be collected and collected.

The above power saving circuit effectively and simultaneously achieves the purpose of selecting information (securing necessary minimum impact information exceeding a reference level) and the purpose of power saving at the same time in cooperation with the above circuits.

Therefore, it is possible to efficiently store required impact information in long-term transportation, respond to long-term transportation, and accurately grasp impact information in a transportation process.

Also, the shock wave memory for transportation can be properly implemented by using a battery so as to add portability and mobility. At the same time, it can be attached to an appropriate place such as a carrier of a transportation vehicle to obtain necessary vibration information during transportation. Only storage is performed, and after transportation, the stored information can be easily taken out by using the connector by carrying it from the vehicle to another place and providing a shock wave storage device for transportation suitable for the purpose of use.

[Brief description of the drawings]

The drawings show an embodiment of the shock wave storage device of the present invention, FIG. 1 is a plan view of the shock wave storage device, FIG. 2 is a longitudinal sectional view schematically showing the internal structure, FIG. FIG. 4 is a block diagram of a circuit configuration of the shock wave memory, FIG. 5 is a circuit diagram for processing a detection signal, and FIGS. 6A, 6B and 6C are output waveform diagrams of each stage in FIG. 3 ... Case, 6 ... Vibration sensor holder, 7a ... X
Vibration sensor in direction, 7b …… Vibration sensor in Y direction, 7c
... Z-direction vibration sensor, 10 ... Range switch, 11 ... Reference level setting knob, 14 ... Time setting dial, 16 ... Connector, 20 ... Charge absolute value amplifier circuit, 21 ... Peak hold Circuit, 22 CPU, 23 Comparator circuit, 32 Temporary write memory, 33 Timer, 34 Write memory, V Power battery.

 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-55-131774 (JP, A) JP-A-61-66165 (JP, A) JP-A-58-158335 (JP, A)

Claims (1)

(57) [Claims] 1. A transportation comprising: a vibration sensor for detecting a shock wave applied during transportation; an information processing storage circuit for storing shock wave information detected by the vibration sensor; and a battery for supplying power to the information processing storage circuit. In a shock wave memory for use, a reference level setting circuit for setting a reference level of a shock wave, a reference level set by the reference level setting circuit and a shock wave are compared, and information is taken in only when a shock wave of a reference level or more is input. A comparator circuit for instructing the processing storage circuit, and the comparator circuit instructing the information processing storage circuit to capture a shock wave equal to or higher than the reference level, and at the same time, supplying power to the information processing storage circuit in accordance with the instruction of the comparator circuit A shock wave memory for transportation, comprising a power saving circuit.