JPH04115387A - Recording slip and its reading method - Google Patents

Abstract

PURPOSE:To surely record information in a recording slip even when the recording slip has been used on the outdoors for a long time by forming a reflective recording part by an ultrasonic wave reflecting material, and even if the slip is exposed to sunbeams, preventing the reflective recording part from being erased due to ultraviolet rays. CONSTITUTION:While depressing a prescribed operation button, the surface of the recording slip is traced from a position separated from the reflective recording part 2 of the slip by an optional height (l) in a fixed direction approximately horizontal to the surface of the slip at an optional speed (nu). Thereby, an ultrasonic wave with prescribed frequency projected from an ultrasonic wave generating means 4 is reflected on the reflective recording part 2 or a non-reflecting part 14 and made incident upon a receiving means 5 and an electric signal with a large sound pressure is outputted from the ultrasonic wave reflected by the recording part 2 and an electric signal with a small sound pressure is outputted from the ultrasonic wave reflected by the non- reflecting part 14. A large sound pressure is outputted in proportion to the depth (DELTAl) of a groove engraved on the base 1 of the recording slip.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a record slip for reading coded information via ultrasonic waves and a method for reading this record slip.

[Conventional technology]

For example, in order to streamline and save labor in various operations such as sales calculations, inventory management, and sorting operations, various types of information about these items are stored in boxes used to package various products and items for delivery. Bar code labels are affixed and are widely used.

[Problem to be solved]

By the way, such barcode labels usually have a black bar printed on a white label material, but the label surface may become dirty or exposed to sunlight (ultraviolet rays).
If a portion of the bar code fades and becomes thin due to Usage is problematic.

Therefore, in view of the above-mentioned drawbacks of the conventional technology, the present invention eliminates the risk of poor reading due to staining, fading, etc., and has high reliability with no loss of information even when used outdoors for a long period of time. The purpose of this invention is to provide a record slip and a method for reading this record slip.

[Means to solve the problem]

That is, the invention according to claim 1 is a record slip on which coded information is recorded, and has a reflective recording section formed of a material that reflects ultrasonic waves into a shape corresponding to the information.

Further, the record slip reading method according to claim 2 of the present invention emits ultrasonic waves of a predetermined frequency toward the record slip, receives the ultrasonic waves reflected by the reflective recording part of the record slip, and generates an electrical signal. , amplify this converted electrical signal, detect the peak value and peak value indicating the waveform of each reflective recording part and non-reflective part of the record slip from the waveform of this amplified electrical signal, and The signal width is converted into a signal width corresponding to the width of each reflection recording part and the recording part interval between the peak values. This detected signal width forms a digital signal having a width corresponding to each reflective recording portion.

[Effect]

In the record slip according to claim 1 of the present invention, the reflective recording part is formed of an ultrasonic reflective material, so that even if mud or the like adheres to it, the dirt can be easily removed by washing. Even if exposed to sunlight, there is no risk that the reflective Mi recording section will disappear due to ultraviolet rays.

Further, according to the method for reading a record slip according to claim 2 of the present invention, by using ultrasonic waves, it is possible to use the record slip in a non-contact state, and wear of the record slip can be prevented accordingly. .

Further, according to the reading method according to claim 2 of the present invention, by reading the peak of the signal waveform output in response to the reflected ultrasonic wave, both end portions of the reflection recording portion can be reliably detected. By comparing the signal waveforms between the peaks, the width of the reflective recording portion 9 and the width between adjacent reflective recording portions can be reliably detected.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a recording slip according to claim 1 of the present invention, and this recording slip has a reflective recording section 2 on the surface of a substrate 1.

The substrate 1 is made of a material that easily absorbs ultrasonic waves, which are a means of reading recorded information. In other words, aluminum (Ajri, plastic resin material, etc.) with low acoustic impedance is used as an ultrasonic absorbing material, and depending on the information to be recorded, In order to form the reflective recording portion 2, this embodiment has a structure in which bar-shaped grooves are carved with a predetermined width and a predetermined interval.

The reflection recording section 2 is made of a predetermined high acoustic impedance material that has a high reflectance to ultrasonic waves, such as tin (in this embodiment).
It is formed by plating a thin film of S, , ), and is formed on the surface of the substrate 1 except for the grooves. Note that the shape of this reflective recording portion is not particularly limited to the bar shape as in this embodiment, and various shapes are possible. Further, the reflective recording portion is not limited to the type in which grooves are carved on the substrate as in this embodiment, but a reflective recording portion having a predetermined shape and no irregularities is formed on the surface of the substrate. Good too.

Next, a reading device to which the recording slip reading method according to claim 2 of the present invention is applied will be described.

FIG. 2 shows a record slip reading device according to the present invention, and this reading device includes an ultrasonic generating means 4, a receiving means 5, an amplifying means 6, and a detecting means 7 inside a housing 3.
, a waveform shaping means 8, and an encoding means 9, and can be operated while holding the housing 3 by hand.

In the figure, reference numeral 10 indicates a decoding means, 11 an interface, and 12 a display means such as a CRT (cathode ray tube), which are all provided in a housing 13 on the main body side.

The ultrasonic wave generating means 4 is configured to emit ultrasonic waves of a predetermined frequency toward the record slip, and in this embodiment, a piezoelectric element is used.

The receiving means 5 is for receiving the ultrasonic waves emitted from the ultrasonic generating means 4 and reflected by the record slip, and detecting the presence or absence of the reflection recording section 2 and the length of the reflection recording section 2. . This receiving means 5 records the reflection recording because the sound pressure ratio is different between the ultrasonic waves reflected and returned by the reflection recording section 2 and the ultrasonic waves reflected and returned from other parts (hereinafter referred to as non-reflection parts). Information about the section 2 is detected and output as an electrical signal. A piezoelectric element is used as the receiving means, and converts the sound pressure signal into an electrical signal. The output side is connected to the input end of the amplification means 6.

The amplifying means 6 is for amplifying the weak electrical signal output from the receiving means 5, and the input side is connected to the receiving means 5.
The output side is connected to the input side of the differentiating means 7.

The differentiating means 7 detects the start signal of the amplified analog voltage waveform and also differentiates the analog voltage waveform.

When the reflective recording section 2 of the record sheet is scanned manually, for example, the waveform shaping means 8 is configured to scan each reflective recording section 2 and the non-reflective section even if some speed unevenness occurs in the scanning speed. The input end is connected to the output side of the differentiating means 7, and the output side is connected to the input side of the encoding means 9.

The encoding means 9 outputs a coded signal having a length corresponding to the width dimension of each reflection recording section 20 based on the output signal outputted by the waveform shaping means 8, and the input side is connected to the waveform shaping means 8. It is connected to the output side, and the output side is connected to the input side of the decoding means 10.

Next, a reading method of the record slip reading device according to this embodiment will be explained.

■ The operator grasps the housing 3 of the device with his/her hand, presses a predetermined operation button, and presses it in a certain direction from a position spaced at an arbitrary height l from the reflective display section 2 of the record slip, as shown in Fig. 3. Trace the record sheet approximately horizontally at an arbitrary speed υ.

(2) Then, the ultrasonic wave of a predetermined frequency emitted from the ultrasonic generating means 4 is reflected by either the reflection recording section 2 or the non-reflecting section 14, and then enters the receiving means 5.

■ The ultrasonic waves incident on the receiving means 5 are reflected by the reflection recording section 2 as electrical signals with a high sound pressure, and those reflected on the non-reflecting section 14 are produced with a low sound pressure. An electrical signal is output.

In addition, the depth (Δβ) of the groove engraved on the substrate 1 of the record slip
The deeper the depth, the better, and the greater the difference in sound pressure will be output.

■ After that, the amplifying means 6, the differentiating means 7, the waveform shaping means 8
And predetermined signal processing is performed by the encoding means 9.

〔effect〕

As explained above, according to the record sheet of claim 1 of the present invention, the reflective recording part is formed of an ultrasonic reflective material, and when used outdoors, for example, mud etc. may adhere to it. It can be easily removed by washing, and there is no risk of the reflective recording section being erased by ultraviolet rays even if exposed to sunlight, so information can be retained even when used outdoors for a long time. It can be recorded reliably.

Further, according to the method for reading a record slip according to claim 2 of the present invention, by using ultrasonic waves, it is possible to read the record slip in a non-contact state, and there is no risk of the record slip being worn out. Moreover, by detecting the peak, the reflection recording part can be reliably detected, and by waveform shaping the signal width between these peaks, the reflection recording part width and the width between adjacent reflection recording parts can be reliably detected. The distance from the record sheet and the scanning speed during scanning do not necessarily need to be constant, and anyone can easily and reliably read the information.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a record slip according to claim 1 of the present invention, FIG. 2 is a configuration block diagram showing a reading device to which the reading method according to claim 2 of the present invention is applied, and FIG. 3 is a block diagram of the present invention. FIG. 2 is a diagram illustrating a reading method according to claim 2. 2... Reflection recording section, 4... Ultrasonic generation means, 5... Receiving means, 6... Amplifying means, 7... Differentiating means, 8... Waveform shaping means, 9... Coding means.

Claims (1)

[Claims] 1. A record slip on which coded information is recorded, characterized by having a reflective recording part formed in a shape according to the information using a material that reflects ultrasonic waves. . 2. Emit ultrasonic waves of a predetermined frequency toward the record slip, receive the reflected ultrasonic waves from the reflective recording section of the record slip, convert them into electrical signals, amplify this converted electrical signal, and From the waveform of the amplified electrical signal, detect the difference in waveform size between each reflective recording part and the non-reflective part of the record slip, and correspond to the width of each reflective recording part and the recording part interval between the detected peak values. 1. A record slip reading method comprising: detecting a signal width of the detected signal width, and forming a digital signal having a width corresponding to each reflective recording portion from the detected signal width.