JPS59163579A - Speed measuring device - Google Patents
Speed measuring deviceInfo
- Publication number
- JPS59163579A JPS59163579A JP3765283A JP3765283A JPS59163579A JP S59163579 A JPS59163579 A JP S59163579A JP 3765283 A JP3765283 A JP 3765283A JP 3765283 A JP3765283 A JP 3765283A JP S59163579 A JPS59163579 A JP S59163579A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- signal
- speed
- amplifier
- reflected wave
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/50—Systems of measurement based on relative movement of target
- G01S13/58—Velocity or trajectory determination systems; Sense-of-movement determination systems
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、移動物体の速度全測定する速度測定装置に関
する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a velocity measuring device for measuring the total velocity of a moving object.
従来例の構成とその問題点
速度測定装置は、たとえは、路上端に配置せられ、車両
等の通過速度を測定するなとに用いられる。この速度測
定装置の１つに、高周波電波を用い、その’Ｉｔ波を移
動物体に放射し、その反射波のドプラーシフ） ｉｆ検
出して、速度を測定する方法がある。このときに、放射
波およびその反射波の周波数をそれぞれ、ｆｏ （ｊｌ
Ｚ） 、ｆｒ（’Ｚ）とすると、
ｆｒｘｆｏ ±ｆｄ （口Ｚ ） −・＝＝（１
）となる。ここで、ｊＯｉｉ徒一般的にドプラーシフト
周阪数と呼称され、゛その値は、
ｆｃｉ−（２・ｆｏ／ Ｃ） ”Ｚ／ （、”Ｚ） −
−＠））として表わされる。なお、Ｃは光の速度であっ
て、その値は、Ｃ＝ ２，９９８Ｘ１０” ｒｎ １５
ｅｃである。Conventional Structure and Problems The speed measuring device is, for example, placed at the end of a road and used to measure the passing speed of a vehicle or the like. One of these speed measurement devices is a method that uses high-frequency radio waves, radiates the 'It wave to a moving object, and detects the Doppler shift (if) of the reflected wave to measure the speed. At this time, the frequencies of the radiated wave and its reflected wave are respectively fo (jl
Z), fr('Z), then frxfo ±fd (mouth Z) −・==(1
). Here, jOii is generally called the Doppler shift periodic number, and its value is fci-(2・fo/C) ”Z/ (, ”Z) −
−@)). Note that C is the speed of light, and its value is C= 2,998X10”rn 15
It is ec.
上記の原理全利用するならば、放射波の周波数ｊＯヲ任
意に設定して、移動物体の速度７）ｋ測定することが可
能となる。If all the above principles are utilized, it becomes possible to arbitrarily set the frequency jO of the radiation wave and measure the velocity 7)k of a moving object.
第１図は、従来の速度測定装置の回路構成全売すブロッ
ク図である。図中１は信号入力端子、２は前置増幅器、
３は主増幅器、４はンユミノトトリガ回路、５は演算回
路、そして６は速度測定端子を示す。FIG. 1 is a block diagram showing the entire circuit configuration of a conventional speed measuring device. In the figure, 1 is a signal input terminal, 2 is a preamplifier,
3 is a main amplifier, 4 is a digital trigger circuit, 5 is an arithmetic circuit, and 6 is a speed measurement terminal.
第１図示回路の描成下においては、たとえば、被測定物
（図示せず）の移動中車両等からの反射波信号のエネル
ギーが、障害物などで小さくなると、信号入力端子１に
は光分な電波が入来されず、したがって、以降の前置増
幅器２、主増幅器３では、シュミットトリガ回路４が正
常に作動するレベルまでには至らず、その結果、シーミ
ツトトリガ回路４の出力には、速度に比例したパルスが
発生しないために、演算回路５より、速度測定端子６に
、速度に比例しだ信号が伝達されず、したがって、その
速度測定；ｉ！ｉ！子６の信号は正確な速度信号を示さ
ないという不都合が存在していた。In the drawing of the circuit shown in the first diagram, for example, when the energy of the reflected wave signal from a vehicle or the like while the object to be measured (not shown) is moving becomes small due to an obstacle, etc., the signal input terminal 1 Therefore, the subsequent preamplifier 2 and main amplifier 3 do not reach the level at which the Schmitt trigger circuit 4 operates normally, and as a result, the output of the Schmitt trigger circuit 4 , since a pulse proportional to the speed is not generated, a signal proportional to the speed is not transmitted from the arithmetic circuit 5 to the speed measurement terminal 6, and therefore, the speed measurement; i! i! A disadvantage existed in that the signal of child 6 did not represent an accurate speed signal.
発明の目的
本発明は、上記の不都合全排除するためになされたもの
であって、所定の入力信号以下の」易合には、速度測定
全実行することのない速度測定装置を提供するものであ
る。OBJECTS OF THE INVENTION The present invention has been made to eliminate all of the above-mentioned disadvantages, and provides a speed measuring device that does not perform full speed measurement when the input signal is less than a predetermined input signal. be.
発明の構成
本発明は、高周波の電波を用いて移動物体の速度を測定
する速度測定装置でろって、前記移動物体からの反射波
信号を速度測定端子に伝達する主信号路と、前記反射波
信号の大きさに応じて前記主信号路を制御する制御信号
生成手段を具え、これによシ、反射波信号の強要が所定
の設定値以下のときに、速度測定が停止されるものとな
る。Structure of the Invention The present invention provides a speed measurement device that measures the speed of a moving object using high-frequency radio waves, and includes a main signal path that transmits a reflected wave signal from the moving object to a speed measurement terminal, and a main signal path that transmits a reflected wave signal from the moving object to a speed measurement terminal. A control signal generating means is provided for controlling the main signal path according to the magnitude of the signal, whereby speed measurement is stopped when the force of the reflected wave signal is less than a predetermined set value. .
実施例の説明、
第２図は、本発明の一実施例装置の回路構成ブロック図
を示す。図中７は論理積回路、８は増幅器、９は横波整
流ｌユ路、そして１０（ｄレベル設定回路である。なお
、第１図と同しものは同一番号食刺した。DESCRIPTION OF EMBODIMENTS FIG. 2 shows a circuit configuration block diagram of an embodiment of the present invention. In the figure, 7 is an AND circuit, 8 is an amplifier, 9 is a transverse wave rectifier circuit, and 10 (d level setting circuit).Items that are the same as those in FIG. 1 have been replaced with the same numbers.
つき゛に動作を説明する。いぼ、被測定物体（図示せず
）刀）ら反射された入力信号が、信号入力端子１に入来
すると、この入力信号（・１、前置増幅器２、王〕・占
輻器３、シュミットトリガ回路４、演算回路５によって
形成される主信号路に供給される。Explain the operation in detail. When an input signal reflected from a wart, object to be measured (not shown) enters the signal input terminal 1, this input signal (1, preamplifier 2, oscillator 3, Schmidt The signal is supplied to a main signal path formed by a trigger circuit 4 and an arithmetic circuit 5.
ここでの主信号路は、第１図の従来例と同じ機能を有し
、したかって、作用も同じである。即ち、前置増幅器２
からの信号は、主増幅器３でさらに増幅、され、シーミ
ツトトリガ回路４に加えられる。The main signal path here has the same function as in the prior art example of FIG. 1, and therefore has the same effect. That is, preamplifier 2
The signal from the main amplifier 3 is further amplified and applied to the seamit trigger circuit 4.
このシュミットトリガ回路４によって、パルス波に整形
された後、論理積回路７を介して演算回路６に加えられ
る。この演算回路５にあらがしめ設定されたクロック周
波数をもとに演算さＪ′シ、速度測定端子６に加えられ
て、移動物体の速１盟が測定されるものとなる。After being shaped into a pulse wave by the Schmitt trigger circuit 4, it is applied to the arithmetic circuit 6 via the AND circuit 7. This calculation circuit 5 calculates J' based on the preset clock frequency and applies it to the speed measurement terminal 6 to measure the speed of the moving object.
一方、信号入力端子１に入来した入力（、ｇ号（は、増
幅器８、検波整流回路９、レベル設定回路１０および論
理積回乎７によって形成される１１Ｊ記主信号全制御す
る制御信号生成手段にも供給される。On the other hand, the input (, g) input to the signal input terminal 1 generates a control signal that controls all of the main signals 11J formed by the amplifier 8, the detection rectifier circuit 9, the level setting circuit 10, and the AND circuit 7. Means are also supplied.
制御信号生成手段の動作は、っき゛に述べる通りである
。いま、信号入力端子−１に入来した入カイ菖号が充分
に大きい場合には、レベル設定回路１゜より制御信号を
受けた論理積回路７は、７−ミノトトリガ回路４の出力
パルスを、常時、演算回路６に伝達するように保持する
。The operation of the control signal generating means is as described above. Now, if the input signal input to the signal input terminal -1 is sufficiently large, the AND circuit 7 which has received the control signal from the level setting circuit 1° converts the output pulse of the 7-minoto trigger circuit 4 into It is held so as to be transmitted to the arithmetic circuit 6 at all times.
また、信号入力端子１に外米した入力信号（反射波信号
）が弱く小さいときには、前置増幅器２および増幅器８
に収り出される信号は、当然のことながら小さいことか
ら、検波整流回路９に生じる直流電圧も低く、レベル設
定回１１１０が作動するまでに至らない。レベル設定回
路１０は検波整流回路９からの直流電圧を受けて、論理
積回路７に所定の電位を与える目的を有し、前記入力信
号が弱く小さい場合には、論理積回路７が、シュミット
トリガ回路４の出力信号を、演乗二回ＩＪ ５ Ｋ伝達
する作用全停止させる電位に設定する。In addition, when the input signal (reflected wave signal) applied to signal input terminal 1 is weak and small, preamplifier 2 and amplifier 8
Since the signal received by the detector is naturally small, the DC voltage generated in the detection rectifier circuit 9 is also low and does not reach the point where the level setting circuit 1110 is activated. The level setting circuit 10 has the purpose of receiving the DC voltage from the detection rectifier circuit 9 and applying a predetermined potential to the AND circuit 7. When the input signal is weak and small, the AND circuit 7 The output signal of the circuit 4 is set to a potential that completely stops the action of transmitting IJ 5 K twice.
第３図は、第２図の増幅器８、検波整流回路９およびレ
ベル設定回路１０のそれぞれ具体的な−実施クリを示す
。増幅器８は、たとえは演算増幅器１１を主体に、抵抗
ＩＲ１，Ｒ２，ｌＲ５およびコンデンサＣ１，Ｃ２よシ
形成することが可能である。丑だ、検波整流回路９は、
ダイオードＩｈ、Ｄ２およびコンデンサＣ３より形成さ
れる。さらに、レベル設定回路１ｏは、トランジスタＱ
ｉ ＋可変抵抗器Ｒ４および抵抗Ｒ５より構成されてい
る。FIG. 3 shows specific implementations of the amplifier 8, detection rectifier circuit 9, and level setting circuit 10 shown in FIG. 2. The amplifier 8 can be formed, for example, mainly by the operational amplifier 11, along with resistors IR1, R2, lR5, and capacitors C1, C2. Unfortunately, the detection rectifier circuit 9 is
It is formed by diodes Ih, D2 and capacitor C3. Further, the level setting circuit 1o includes a transistor Q
i + variable resistor R4 and resistor R5.
発明の効果
以上に述べたように本発明の速度測定装置は、速度測定
の実行もしくは停止は、被測定物体から入来される反射
波入力信号のレベルに応じて作動される制御信号生成手
段によって判し１されることから、信号が弱く小さい場
合に生じた従来＋Ｊ、〒の誤った速度測定を排除でき、
その工業的価値は大きい０Effects of the Invention As described above, in the speed measuring device of the present invention, speed measurement is executed or stopped by the control signal generating means operated in accordance with the level of the reflected wave input signal received from the object to be measured. 1, it is possible to eliminate the erroneous speed measurements of +J and 〒 that occurred in the past when the signal was weak and small.
Its industrial value is large 0
第１図は、従来の速度測定装置図、第２図は本発明の速
度測定装置図、第３図は、第２図の要部の具体的回路図
である。
１・・・・・・信号入力端子、２ ・・・・前置増幅器
、３・・・主増幅器、４・・・・・・シュミノトドリカ
回路、５・・・・・演算回路、６・・・・・・速度測定
端子、７・・−・・・論理積回路、８・・・・・増幅器
、９・・・・・検波整流回路、１゜・・・・・・レベル
設定回路、１１・・・・・・演算増幅器。FIG. 1 is a diagram of a conventional speed measuring device, FIG. 2 is a diagram of a speed measuring device of the present invention, and FIG. 3 is a specific circuit diagram of the main part of FIG. DESCRIPTION OF SYMBOLS 1...Signal input terminal, 2...Preamplifier, 3...Main amplifier, 4...Shiminotodorika circuit, 5...Arithmetic circuit, 6... ...Speed measurement terminal, 7...-AND circuit, 8...Amplifier, 9...Detection rectifier circuit, 1゜...Level setting circuit, 11... ...Operation amplifier.
Claims (2)
速度測定装置であって、前記移動物体力・らの反射波信
号を速度測定端子に伝達する主信号路と、前記反射波信
号の大きさに応じて前記生貝 信号路を制御する制御信号生成手段ヲサえる速度測定装
置。(1) A speed measurement device that measures the speed of a moving object using high-frequency radio waves, which includes a main signal path that transmits the reflected wave signal of the moving object force to a speed measurement terminal, and a main signal path that transmits the reflected wave signal of the moving object force and A speed measuring device capable of controlling a control signal generating means for controlling the raw shellfish signal path according to the size of the raw shellfish.
の信号を直流電圧に変換する検波整流回路と、同検波整
流回路の電圧の大きさで作動されるレベル設定回路と、
同レベル設定回路で・制御１される論理積回路と金具え
た特許請求の範囲第１項記載の速度測定装置。(2) The control signal generation means includes an amplifier, a detection rectifier circuit that converts the signal of the PIB device into a DC voltage, and a level setting circuit that is activated depending on the voltage of the detection rectifier circuit;
A speed measuring device according to claim 1, comprising an AND circuit controlled by the same level setting circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3765283A JPS59163579A (en) | 1983-03-08 | 1983-03-08 | Speed measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3765283A JPS59163579A (en) | 1983-03-08 | 1983-03-08 | Speed measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59163579A true JPS59163579A (en) | 1984-09-14 |
Family
ID=12503570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3765283A Pending JPS59163579A (en) | 1983-03-08 | 1983-03-08 | Speed measuring device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59163579A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110221091A (en) * | 2019-06-10 | 2019-09-10 | 合肥工业大学 | A kind of weak signal extraction for surveying Rotational Speed of Asynchronous Motor based on actinobolia |
-
1983
- 1983-03-08 JP JP3765283A patent/JPS59163579A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110221091A (en) * | 2019-06-10 | 2019-09-10 | 合肥工业大学 | A kind of weak signal extraction for surveying Rotational Speed of Asynchronous Motor based on actinobolia |
| CN110221091B (en) * | 2019-06-10 | 2021-05-28 | 合肥工业大学 | Weak signal extraction method for measuring rotating speed of asynchronous motor based on induction method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5937459A (en) | Body detector by ultrasonic wave | |
| DE58909190D1 (en) | Device for measuring ultrasound propagation times. | |
| US4567766A (en) | Piezoelectric ultrasonic apparatus and method for determining the distance from a predetermined point to a target | |
| JP2005524063A (en) | Ultrasonic Doppler effect velocity measurement method | |
| GB2170907A (en) | Improvements relating to distance measuring devices | |
| JPS5856085B2 (en) | Method and device for measuring thickness or depth of abnormal area using ultrasonic pulses | |
| JPS59163579A (en) | Speed measuring device | |
| JP3117372B2 (en) | Ultrasonic distance measuring device | |
| JPH0221257B2 (en) | ||
| JPH0645276Y2 (en) | Received pulse detection circuit for DME | |
| JPH07325151A (en) | Ultrasonic distance measuring equipment | |
| JPS5997069A (en) | Ultrasonic car height measuring apparatus | |
| JPS54119953A (en) | Ultrasonic wave detection type kalman vortex flow meter | |
| JPS57187609A (en) | Measuring device for decrease in wall thickness | |
| JP2545029Y2 (en) | Ultrasonic sensor | |
| SU373610A1 (en) | A DEVICE FOR MEASURING THE SPEED OF ULTRASOUND 'POE UNION ^' '•' '; ~' 'G;.:: P ((““ <i <- • - - • •.!.. „• • itif. , -. yi? JJJ-lOTE; • • | |
| JPS62144011A (en) | Apparatus for measuring reflected wave signal of ultrasonic wave | |
| JP2778300B2 (en) | Ultrasonic distance measuring device | |
| KR960012072B1 (en) | Wheel balancer | |
| JPS5836062Y2 (en) | Doppler radar device | |
| JPH08226843A (en) | Signal processing circuit of ultrasonic liquid-surface level meter | |
| JPS6339659Y2 (en) | ||
| JPS59218973A (en) | On-vehicle obstacle detector | |
| JPH02203291A (en) | Ultrasonic doppler speedometer | |
| JPS61145470A (en) | Ultrasonic range finder |