JPS5954983A - Sound wave transmitter/receiver for measuring distance - Google Patents

Abstract

PURPOSE:To achieve a smaller size and a lighter weight with an integral formation of a transmitter and a receiver by providing a first conical reflection body adapted to convert and reflect a sound wave in the specified direction and a second reflection body for irradiating reflected waves to an object to be measured on the output side of the transmitter. CONSTITUTION:When a transmitter/receiver is operated at the position facing an object to be measured, a transmitter 1 transmits a sound wave having a specified frequency. The sound wave thus transmitted is reflected outwardly with the conical surface of a first reflection body 7 and reaches a second reflection body 8. The second reflection body 8 changes the angle of reflection freely to have the sound wave irradiating the object being measured accuately. The sound wave irradiated from the second reflection body 8 reaches the object and reflected to be inputted into a receiver 11 of the transmitter/receiver 11. The sound wave is converted into an electrical signal to be introduced to a processing circuit.

Description

[Detailed description of the invention] 沫□Kageki uses sound waves to measure the distance to an object 7;
: Concerning sending □ receiving fatigue'1. □
1 While driving a car, it is important to maintain a constant distance between vehicles and to maintain a constant distance between vehicles. □ □ ・ ・
： ・□Therefore, if it is possible to avoid contact with the vehicle in front by detecting the stopping distance and automatically □ or by issuing a warning, the automatic □ safety □ safe parking □ Contribution □ is a big deal.

,5. Eka8. So, j=ili,! ';*Nozomi, 5.
Target, S・6 Auto: Movement・Slip, ゛・: Distance with the car - 1 Accuracy, 1'<II・Detection, can be detected. A raw type, 111:1 knee... We needed a detector that could be mounted on a car. Hiro □By the way, conventionally, the detectors that can detect this type of i and 6 distances are, as shown in Figure 1, a transmitter that generates sound waves or ultrasonic waves, and A receiver that receives ultrasonic waves is placed separately, and the ultrasonic waves emitted from the transmitter or the ultrasonic waves from an object are transmitted.

Detect and receive reflected waves! It is a means of determining the presence of an object from the intensity of the reflected wave input to the device, and measuring the distance to an object from the phase shift between the transmitted and received waves.
□、・・．

However, since the transmitter and receiver are placed separately in the above means, in order to accurately detect the distance to the object, 1. The positional relationship becomes a problem and its adjustment is extremely difficult.

Furthermore, as mentioned above, since the transmitter and receiver are separate in order to use the above-mentioned means mounted on a car, it is necessary to have enough space to accommodate them.
Shoulder: '、 、 、 、 、 6 is complicated 、 、 、 Has some flaws ・
:ya:・,ra,'-□ The present invention is an improvement on the above-mentioned conventional 11Aut.

-Ya. @I) QGf, l@"eIMm・1st Lieutenant □-, Yo 1o71, Lung Gorge.

By integrally forming the transmitter and receiver, 1
This is an attempt to provide a device that can detect accurately without requiring strict adjustment of positional relationships.
″ □The transducer of the present invention comprises a transmitter that emits sound waves having a predetermined force frequency □ wave number, and a sound wave inputted at a position opposite to the output side of the transmitter that splits the incoming sound wave into a predetermined direction. Converting the reflection into the output-gate-like a first icr>reflection 4, and the 1st reflection □' □.

A predetermined distance from the position of the envelope, and the reflected wave from the first reflector is transmitted to the object to be measured! ＊It is made up of a second reflector placed at a predetermined angle and a receiver placed on the opposite back surface of the first reflector to receive the reflected wave from the object to be measured. It is something.

According to the present invention, it is possible to provide a small and lightweight distance measuring transducer that can be mounted on a moving object such as an automobile. In addition, the output signal is sequentially reflected from the cone. As a result, the output signal can be sent to the target object with a high power, and the distance can be measured with good accuracy. ,,.

9. Invention 9. Transmission and reception of waves. When an object to be measured exists within the measurement range, a transmitter is activated to detect the distance between the object and the object to be measured, and emits a sound wave. radiated. Since the first reflector is provided at the opposite position of the transmitter, the sound wave is transmitted to the reflector of the bamboo grass 2. The second reflector is arranged at a certain angle, F!, to ensure that the object to be measured is illuminated. This is the setting. Therefore, the sound and waves outputted by -1 can be output without any problems or problems.1. Irradiates the object to be measured. Sound waves irradiated to the buttocks of the object to be measured.

The beam is reflected and input to the receiver efficiently.

The reflected wave input to the receiver can detect the irradiation position of the object from the intensity of the reflector, and furthermore, the transmitted wave.

and chapter, double wave? ,Since the distance to the object can be detected from the phase shift, , , , , , , , , , , , , , ,.
, ::, ,.

Since the transducer of the present invention is configured so that the transmitter and the receiver are arranged on the same axis, when it is desired to detect the distance to an object to be measured, the object to be measured is placed on the axis of the transducer of the present invention. It is possible to accurately locate the position. Moreover, since the conditions based on the geometrical arrangement of the transmitter, the object to be measured, and the receiver are determined integrally, it can be made very simple. Moreover, it has high practical utility value because it can be compacted into one eave.

Further, in the transducer of the present invention, the first reflection.

The reason why the body is shaped like a cone is to transmit sound waves outward from the axis.2 If the transducer of the present invention is made smaller, the transmitter, receiver, and transmitter can be made the same. - Axial force! is necessary. It is also necessary to select materials that can reflect sound waves efficiently.

Furthermore 1. In Honkinmei's transducer, the second reflector is cone-shaped (funnel-shaped), which effectively absorbs the sound waves reflected from the first reflector placed on the central axis. It is intended to aim and aim at the object to be measured in front.

By adjusting the irradiation position, holding the object to be measured, and adjusting the geometry of the receiving fin edge and stopper to the ts2Ak beam reflection door ♀ self-stopping, it is easy to obtain and arrest the object. -□-Refer to the following 9 drawings and explain in detail how to use the 9 pieces.□
−′ □ −−−′□ :・1 Since the pressure wt that emits the sound wave is not from the bare body, etc., the 1 signal device 1 is designed to emit light to the outside through the through hole i- through the inside of the body 2. 1 l l :, l : l ''-A periphery i of the support 2 is provided with flanges 6 arranged at intervals □, 1 fringe part 6f is connected to the output of the support device 1a. Then, a conical first reflector 7 is formed on the axis of the body 2 in the cylindrical shape ★, and is made of a metal, boomstick, etc. that reflects sound waves well.
″ □ Kaoruta+ 1lII The outer surface of the cylindrical support plane is made of p-F made of metal, plastic, etc. that reflects sound waves well.
Set up a piece 1 of shape i.

Bonding: The second A reflector 1 field support Ms- is illuminated on the outer circumferential surface of the MM-shaped support i42 on the 1st leg 9, and the The threaded portion of the guide ring 9 is rotated by 1' to move the annular body lO forward.
,,.

Honor 1. A plurality of incisions 80 are provided from the outer i side to the i.6 part, and when the ring body 10 is pressed from the back side, the wide reflection crystal 8 is connected to the original jar mi'a''a. It is designed to be able to open and close inwardly and outwardly using the junction as a fulcrum, so that the degree of irradiation of the sound waves can be adjusted as desired.

The receiver i1, which has the same force as the electromagnetic element ii, is located opposite the axis lAf7 of the foreboard cylindrical sleeve support 2, the i-th □1.

The leads 44118 of the receiver 11 are led out along the side surface of the support 12 through the hole 5 of the cylindrical support 2.

The signal processing circuit connected to the above transducer is shown in Figure 4.
Drunk, ah, t:／・□ 1. ．． One. Kt! ! mm: [11'4,? Okayuya 1
．． 2. Consists of an indicator hand 16 and a phase meter 17, which detects the intensity of the received sound wave, and is connected to one input end of the transducer, the oscillator 14 that generates the measured object, and the differential amplifier 15. do. On the other hand, terminals 11@ of the receiver 11 are connected to one input terminal of the phase meter 17 and the other input terminal of the differential amplifier 15, respectively.

Further, the output end 11)a of the differential amplifier 15 is connected to a display meter 16 that displays the intensity of the sound wave.

The other input end 17b of the phase meter 17 is connected to the oscillation device 1.
4 and the distance to the object to be measured is to be displayed from the phase difference displayed on the 1 phase meter 17.

, 7i-7 With the above configuration, it is more effective than Lumi.

□ Place the sending I-1 opposite the IJ fixed object and make it.
, ・Sei ・ ・, .

When moved, the transmitter 1 of the transducer emits a sound wave having a predetermined frequency □. The emitted sound waves are reflected and emitted in the i direction by the conical surface of the first reflector 7, and are emitted from the second reflector.
II reaches the reflector 8 of. Since the second gate sealing body 8 can be freely changed from "Onmon HM 'ti"#Measurement i-Illumination □□, it can be adjusted as necessary.

The sound waves irradiated from the second reflector 8 reach the constant object, and the sound waves that have arrived are reflected here and input to the receiver 11 of the transducer. □The receiver 1'1 is intended to convert sound waves into electrical and electrical signals, so the input wave is accurately converted into an electrical signal and guided to the processing circuit.

One of the signals inputted to the processing circuit 1 is sent to the differential amplifier 15.
and is guided to the display meter 16.

The deflection of the pointer of the display meter 16 is responsible for the strength of the sound wave input to the receiver 11, and the y-ray angle of the second reflector 8 can be adjusted immediately. 111 As soon as the sound wave is strong, the display meter 1f3179 finger of the processing circuit swings inward, - force) object or 9 phase meter 17 is the 5th
As shown in the figure, the input signal of the qp unit 1 and the output signal of the receiver 11 correspond in phase. Therefore, if the relationship between one phase shift and range distance is engraved on the scale of the display hand, it can be directly displayed.

The above-mentioned implementation-〇The sending and receiving device has good accuracy and is easy to handle [this is of very high practical value.

By the way, the transducer of the above practical example can also be implemented in the following embodiments.

That is, in the *stream side transducer F, the 11p reflector 7 was formed into a conical shape, but a pyramid may be used as long as it does not reduce the radiation efficiency.

In addition, - Anagami Sonic Ω Jinpi is reduced by half, but the measurement device is thick and spicy! If you want to receive it, you can also use a shaft that is vertically divided through the main shaft. .

Furthermore, the second e reflection 8. It is also possible to make the funnel-shaped inner surface into one or more tanzaku-shaped reflecting surfaces. It is. Also, for convenience of measurement, the reflector of 2 is used as i Kumon. can also be used.

In addition, the transmitter/receiver on the Joki Shinji side
Fixed thing? Please confirm @2. Adjust the angle of the reflector 8 and adjust the pointer of the display meter that displays the input sound wave intensity so that the pointer of the display meter 16 is at its maximum value. The pointer on the display meter 16 is constantly detected, and based on this signal, the ring body 10 disposed on the outer circumferential surface of the cylindrical support body 2 is automatically moved back and forth.

It is also possible to adopt a configuration in which the angle of the 2.0th reflector 8 is adjusted optimally.

[Brief explanation of the drawing]

1 reflector, 8... second reflector, ' l O,...
... Ring body, 11 ... Receiver, 14 ... Oscillation device. 15...Differential amplifier, 16...Display meter, 17... ...Phase meter. Applicant Toyota Central Research Institute Co., Ltd. Representative Patent Attorneys: Takahashi, Shoyasu Patent Attorney Katsuhiko Takahashi Patent Attorney Masaru Sugigi 2nd (A) 3rd Tokou 4th 501-

Claims (1)

[Claims] (1) A transmitter that emits sound waves having a predetermined frequency;
a cone-shaped first reflector that faces the radiation side of the transmitter and reflects the incident sound waves in a predetermined direction;
A・□、：・：・□. A second reflector is located at a predetermined distance from the position of the -1 reflector and is arranged to direct the reflection 7 from the first reflector to the object to be measured;・It is characterized by consisting of a receiving l?i!t placed on the opposite side of the □ first reflector to receive the harmonic wave reflected from the measurement object: a transducer for distance measurement. (2) The second reflector can be freely changed to a desired right angle with respect to the wave axis radiating from the edge signal to the first reflector. Range No. 1 on board: 'Distance #□ Fixed transducer.'
□ □(8) The conical 1'lF) reflector is conical or cone-shaped.
A transducer for distance measurement as described in . (4) The second reflector is a cone-shaped body. Feature F) + Claim A - A single-wave □ device for distance measurement □ described in item 1 pL7. " - □ □ (5) 1. The constant-distance transducer according to item 4 of the so-called □ range of special age ice, characterized in that the second reflector 119 of the conical rim is a cone or a polygonal pyramid. 1 ■
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