专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JPH11326515A LIGHT WAVE DISTANCE MEASURING APPARATUS 失效
公开(公告)号：JPH11326515A
公开(公告)日：1999-11-26
申请号：JP13291598
申请日：1998-05-15
申请人： NIKON CORP
发明人： TANAKA TOSHIHIRO
IPC分类号： G01S7/481 , G01S7/486 , G01S7/497 , G01S17/10
摘要： PROBLEM TO BE SOLVED: To provide a light wave distance measuring apparatus which eliminates a measuring error due to stray light or the like even in a light transmitting-receiving coaxial optical system. SOLUTION: In a light wave distance measuring apparatus, a light transmitting means 3 which transmits pulsed light toward an object is provided, a light receiving means 4 which receives reflected pulsed light reflected by the object is provided, and a time measuring part 2 which measures the time elapsed until the pulsed light is received since it is transmitted is provided so that a distance up to the object is found on the basis of the measured time. In addition, in the electronic distance measuring apparatus, a pulse-number detection part 62 which detects whether the number of beams of received reflected pulsed light is one beam or a plurality of beams is installed. The pulse-number detection part 62 responds to the stray light of the pulsed light so as to exclude a value at a time when the plurality of beams of reflected pulsed light are detected.

2. 发明专利

JPH01156617A OPTICAL FIBER AZIMUTH SENSOR 失效
公开(公告)号：JPH01156617A
公开(公告)日：1989-06-20
申请号：JP31682887
申请日：1987-12-15
申请人： NIKON CORP
发明人： TANAKA TOSHIHIRO , YOSHIDA NOBUAKI , NAKAZAWA KIYOHIKO , HASHINO NORICHIKA
IPC分类号： G01C19/64 , G01C17/00 , G01C19/72
摘要： PURPOSE:To improve the S/N by combining two optical fiber gyros and erasing a noise and a drift by a processing of output signals of each of them. CONSTITUTION:The first and the second loops are provided by forming the first optical fiber 12 and the second optical fiber 13 in a loop shape, respectively, and these first and second loops are placed adjacently. As for the first and the second optical fibers 12, 13, a modulating part 51 is provided on a position of the same distance from their each different end parts. In this state, a light beam from a light source 21 is led into the optical fibers 12, 13 through a branch coupler 22, and light beams from the optical fibers 12, 13 are detected by photodetectors 41, 42. Outputs of these photodetectors 41, 42 contain a noise of the same phase, and by processing these outputs, the noise is erased.

3. 发明专利

JPH11281744A Distance measuring instrument 有权
标题翻译：距离测量仪器
公开(公告)号：JPH11281744A
公开(公告)日：1999-10-15
申请号：JP36785698
申请日：1998-12-24
申请人： Nikon Corp , 株式会社ニコン
发明人： TANAKA TOSHIHIRO , YOSHIDA HISASHI
IPC分类号： G01B11/00 , G01C3/06 , G01S17/10 , G04F10/00
摘要： PROBLEM TO BE SOLVED: To provide a distance measuring instrument which is improved in accuracy of short-distance measurement, by eliminating the measurement error of fractional time.
SOLUTION: A distance measuring instrument is provided with a light emitting section which emits pulsed light toward a target in response to a measurement start signal, a light receiving section which outputs a measurement stop signal in response to received reflected pulse light from the target, and a time measuring section 10 which measures the time spent until the measurement stop signal is outputted after receiving the measurement start signal by measuring start-side fractional time shorter than a prescribed number of reference clocks after receiving the measurement start signal, stop-side fractional time shorter than a prescribed number of reference clocks after receiving the measurement stop signal, and the number of reference clocks until the stop-side fractional time ends after the start-side fractional time ends and finds the distance to a target from the measured time. The measuring instrument has such a feature that the instrument emits the pulsed light with a prescribed time lag after receiving the measurement start signal.
COPYRIGHT: (C)1999,JPO
摘要翻译：要解决的问题：提供通过消除分数时间的测量误差来提高短距离测量精度的距离测量仪器。解决方案：距离测量仪器具有响应于测量开始信号向目标发射脉冲光的发光部分，响应于来自目标的接收到的反射脉冲光而输出测量停止信号的光接收部分，以及时间测量部分10，其在接收到测量开始信号之后测量直到测量停止信号输出的时间，在接收到测量开始信号之后，通过在接收到测量开始信号之后测量比规定数量的基准时钟短的开始分数时间，停止侧分数时间在接收到测量停止信号之后比指定数量的参考时钟短，并且在起始侧分数时间结束之后直到停止侧分数时间结束的参考时钟的数量从测量时间找到到目标的距离。测量仪器具有以下特征：仪器在接收到测量开始信号后以规定的时间滞后发射脉冲光。

4. 发明专利

JPH1123709A DISTANCE-MEASURING DEVICE 失效
公开(公告)号：JPH1123709A
公开(公告)日：1999-01-29
申请号：JP18147397
申请日：1997-07-07
申请人： NIKON CORP
发明人： TANAKA TOSHIHIRO
IPC分类号： G01B11/00 , G01C3/06 , G01S7/48 , G01S7/487 , G01S7/489 , G01S17/10
摘要： PROBLEM TO BE SOLVED: To accurately measure distance even if there are large reflection pulses from an object at the rear of a target by allowing an quantity-of-light control means to control a quantity-of-light variable part in accordance with the quantity of light of initial light pulses through an external light path and light pulses through an internal light path. SOLUTION: A light pulse light transmission means 100 selects either an external light path 106 for transmitting light pulses toward a target 105 or an internal light path 107 for transmitting light pulses for obtaining the reference level of light pulses in a state where the quantity of light is balanced toward the inside of a device, thus emitting the light pulses. A light pulse reception means 101 receives light pulses through the external light path 106 or the internal light path 107, converts them to electrical signals, and output them to a time measurement means 102. A quantity-of-light control means 103 controls a quantity-of-light variable part 104 and balances quantity of light for making equal the quantity of received light of light pulses through the external light path 106 and the internal light path 107. The time difference between the emission timing from the light transmission means 100 and the reception timing from the light reception means 101 is measured by the measurement means 102, thus obtaining distance.

5. 发明专利

JPH07198846A DISTANCE MEASURING APPARATUS 失效
公开(公告)号：JPH07198846A
公开(公告)日：1995-08-01
申请号：JP35125993
申请日：1993-12-28
申请人： NIKON CORP
发明人： TANAKA TOSHIHIRO , KAYAMA YASUNAGA
IPC分类号： G01S17/10 , G01S17/93
摘要： PURPOSE:To suppress the cost and power consumption by providing gradient detecting means for checking gradient of waveform of a received signal and a predicting means for predicting peak position of the signal based on data of the detecting means. CONSTITUTION:A reflected pulse from an object 11 to be measured is condensed by a receiving lens 6, and made incident on a photoreceiver 7. The incident light is photoelectrically converted by the photoreceiver 7, a received signal S4 is amplified by an amplifier 8, and input to a comparator 9. The comparator 9 switches over threshold level to high and low stages based on a threshold switching-over signal S9 from a computer 1, and sends received trigger signals S6 at the respective threshold levels to a counter 10. The counter 10 decides gradient of waveform of the signal S4 from a set value of amplitude in an amplitude direction of the signal and a width in a time base direction of the signal to the set value. The amplitude and a peak position of the signal S4 are predicted from its gradient by the computer 1.

6. 发明专利

JPH07167955A DISTANCE MEASURING DEVICE 失效
公开(公告)号：JPH07167955A
公开(公告)日：1995-07-04
申请号：JP34229893
申请日：1993-12-15
申请人： NIKON CORP
发明人： IOHARA KENJIRO , TANAKA TOSHIHIRO
IPC分类号： G01S7/48 , G01S17/10 , G01S17/93
摘要： PURPOSE:To prevent erroneous determination of distance due to interferential light or external turbulent light by furnishing a lighting signal continuing means to shut transmission of the lighting signal to a light emitting means for a specified period of time, and calculating the distance by a calculating means while the time measured during the specified period is excluded. CONSTITUTION:When a light emission admitting signal S1 is issued from a CPU 1, lighting pulse S5 is given from a lighting signal generation part 2 to an LD lighting switch 10, which sends a lighting pulse S6 to an LD driver 3. The driver 3 prepares a pulse S7 synchronous with the pulse S6 and sends it S7 to a light source 5, which emits light pulse to outside via a lens 6. A light pulse from an object 9 is passed through a receiving lens 12, converted by a light receiving element 6 into a signal S8, amplified 7, and fed to a comparator 8, which emits digital signal 10 to a counter 5. The counter 5 counts reference clocks CK corresponding to the time from signal S5 to signal 10, and the count data S3, or overflow signal, is entered into the CPU 1 to serve for calculating of the distance from the object 9.

7. 发明专利

JPH01209317A AZIMUTH SENSOR 失效
公开(公告)号：JPH01209317A
公开(公告)日：1989-08-23
申请号：JP3484888
申请日：1988-02-17
申请人： NIKON CORP
发明人： TANAKA TOSHIHIRO , NARA MAKOTO , NAKAZAWA KIYOHIKO , YOSHIDA NOBUAKI
IPC分类号： G01C19/72 , G01C17/00 , G01C19/00 , G01C19/64
摘要： PURPOSE:To make it possible to obtain a correct azimuth signal without being affected by noises caused by the rotation of an optical gyroscope, by obtaining said azimuth signal on the basis of signals when said optical gyroscope stands still. CONSTITUTION:A rotation controlling device 2 rotates a fiber-optic gyroscope 1 intermittently every fixed rotary angles and generates a stopping signal to a signal reading device 3. When the stopping signal is inputted from the rotation controlling device 2 to the fiber-optical gyroscope 1, the signal reading device 3 reads an azimuth signal at that time from the fiber-optic gyroscope 1. The azimuth signal read by the signal reading device 3 is outputted, together with the rotary angles of the fiber-optic gyroscope 1, to an operating device 4. The operating device 4 obtains a correct azimuth signal of the fiber-optic gyroscope 1 on the basis of the inputted data, and a display means 5 indicates the azimuth of a target position at the rotation starting position based on the obtained azimuth signal.

8. 发明专利

JPH01148724A PRODUCTION OF POLARIZATION RETAINING FIBER 失效
公开(公告)号：JPH01148724A
公开(公告)日：1989-06-12
申请号：JP30672387
申请日：1987-12-03
申请人： NIKON CORP
发明人： YOSHIDA NOBUAKI , KAYAMA YASUNAGA , TANAKA TOSHIHIRO , NAKAGAWA YOSHIYUKI
IPC分类号： C03B37/012 , G02B6/00 , G02B6/024 , G02B6/10
摘要： PURPOSE:To obtain the title fiber having a high extinction ratio irrespective of the absence of a stress imparting part by inserting a quadrangular prismatic core into the quadrangular prismatic hollow part formed at the center of a clad vitrifying the materials, regulating the clad outer diameter, and then drawing the materials. CONSTITUTION:The sooty clad 21 of fiber made by the CVD, VAD, duplex crucible methods, etc., is bored at its center to form the part 22 in the form of a quadrangular prism. The core 11 in the form of a quadrangular prism is inserted into the hollow part. The materials are heated in a high-temp. furnace, and vitrified to obtain a preform. The preform is then pressed from the outside, if necessary, to eliminate the gap between the hollow part 22 and the core 11, ground into a circle, and further heated to shape the surface. The preform is drawn while keeping its circular profile, and the fiber having the rectangular core 11 is obtained. The clad is then coated, as required, with a protective primary coat, a buffer layer, a jacket layer, etc.

9. 发明专利

JPH09189766A TIME/VOLTAGE CONVERSION CIRCUIT AND DISTANCE MEASURING DEVICE 失效
公开(公告)号：JPH09189766A
公开(公告)日：1997-07-22
申请号：JP166996
申请日：1996-01-09
申请人： NIKON CORP
发明人： TANAKA TOSHIHIRO
IPC分类号： G04F10/10 , G01S7/48 , G01S13/08 , G01S17/08 , H03K3/013 , H03K11/00
摘要： PROBLEM TO BE SOLVED: To provide a time/voltage conversion circuit for converting time to voltage which is capable of reducing the effect of noise and a distance measuring device for measuring distance to a measuring object by measuring a part or all of return time of measuring wave which is capable of improving distance accuracy with the use of the conversion circuit. SOLUTION: Provided are a measuring pulse generation circuit 21 generating a measuring positive pulse signal and a measuring negative pulse signal which are two measuring pulses with different polarity and pulse widths of a comparator output as the first signal and of the generation time interval of a reference clock as the second signal, pulse width/voltage conversion circuits 22 and 23 receiving the measuring positive pulse signal and the measuring negative pulse signal, charging capacitors from the front end to the back end of them and outputting a voltage value corresponding to the pulse width.

10. 发明专利

JPH08124100A MONITORING DEVICE FOR DISTANCE BETWEEN VEHICLES 失效
公开(公告)号：JPH08124100A
公开(公告)日：1996-05-17
申请号：JP26567194
申请日：1994-10-28
申请人： NIKON CORP
发明人： TANAKA TOSHIHIRO
IPC分类号： G08G1/16 , B60W30/00 , G01S13/93 , G01S17/93
摘要： PURPOSE: To accurately detect the possibility of a collision based on the predicted value of the distance secured between an obstance and a vehicle at the time of turning motion, regarding a monitoring device for a distance between vehicles. CONSTITUTION: This device is provided with an angular velocity detection means 15 detecting the angular velocity of a vehicle, a prediction means 16 performing an arithmetic operation by an expression d=(D +R -2DRcosθ) -R for the relative distance D of a target, a rotary virtual radius R given by the ratio of running speed and the angular velocity and the difference θof the rotary virtual center point in a prescribed location and the azimuth of the target and predicting the distance (d) of the target along the straight line connecting the virtual center point and the target and the prescribed location, and a decision result correction means 17 comparing the difference of the distance in a vehicle width direction of the object located on the opposite side to the virtual center point of the side part of the vehicle and the prescribed location and the distance (d) that the prediction means 16 predicts with a preliminarily determined threshold and invalidating the possibility of a collision via a detection means 14 or at the output terminal of the detection means when the former exceeds the latter.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式