JP6992439B2 - Object detector - Google Patents

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JP6992439B2
JP6992439B2 JP2017225031A JP2017225031A JP6992439B2 JP 6992439 B2 JP6992439 B2 JP 6992439B2 JP 2017225031 A JP2017225031 A JP 2017225031A JP 2017225031 A JP2017225031 A JP 2017225031A JP 6992439 B2 JP6992439 B2 JP 6992439B2
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敦 中林
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Aisin Corp
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Description

本発明は、物体検出装置に関する。 The present invention relates to an object detection device.

車両等に設けられて、車両の周辺の障害物等の物体を検出する物体検出装置が知られている。例えば、物体検出装置は、超音波等の探査波を送信し、物体に反射された探査波を受信することによって物体を検出している。このような物体検出装置は、探査波を送受信する複数の送受信部を有する。物体検出装置は、送受信部が送受信した探査波を同じ送受信部が受信した直接波及びいずれかの送受信部が送信した探査波を他の送受信部が受信した間接波等による三測量によって、物体の位置等を検出している。 An object detection device installed in a vehicle or the like and detecting an object such as an obstacle around the vehicle is known. For example, an object detection device detects an object by transmitting an exploration wave such as an ultrasonic wave and receiving the exploration wave reflected by the object. Such an object detection device has a plurality of transmission / reception units for transmitting / receiving exploration waves. The object detection device is an object by three- sided survey using a direct wave received by the same transmission / reception unit for the exploration wave transmitted / received by the transmission / reception unit and an indirect wave received by the other transmission / reception unit for the exploration wave transmitted by one of the transmission / reception units. The position of is detected.

特開2016-80641号公報Japanese Unexamined Patent Publication No. 2016-80641

しかしながら、上述の物体検出装置は、送受信部が間接波しか受信できなかった場合、受信した間接波を物体の検出に利用できないといった課題がある。 However, the above-mentioned object detection device has a problem that when the transmission / reception unit can receive only an indirect wave, the received indirect wave cannot be used for detecting an object.

本発明は、上記に鑑みてなされたものであって、送受信部が間接波しか受信できなかった場合でも、受信した間接波を物体の存在の判定に利用できる物体検出装置を提供することを目的とする。 The present invention has been made in view of the above, and an object of the present invention is to provide an object detection device that can use the received indirect wave for determining the existence of an object even when the transmitting / receiving unit can receive only an indirect wave. And.

上述した課題を解決し、目的を達成するために、本発明の物体検出装置は、物体を検出するために周辺に探査波を送受信する第1送受信部及び第2送受信部から取得した前記探査波の送受信に関する送受信情報に基づいて、前記第1送受信部及び前記第2送受信部が直接波または間接波を受信したか否かを判定して判定結果を出力する探査波判定部と、前記判定結果に基づいて、三測量が成立すると判定した場合の第1信頼度と、前記第1送受信部及び前記第2送受信部の両方が前記間接波を受信した場合の第2信頼度との和である判定用総和とを算出して、当該判定用総和に基づいて物体の存在を判定する物体判定部と、を備える。 In order to solve the above-mentioned problems and achieve the object, the object detection device of the present invention has the exploration wave acquired from the first transmission / reception unit and the second transmission / reception unit that transmit and receive the exploration wave to the surroundings in order to detect the object. A search wave determination unit that determines whether or not the first transmission / reception unit and the second transmission / reception unit have received a direct wave or an indirect wave and outputs a determination result based on the transmission / reception information related to the transmission / reception of the above, and the determination result. Based on the above, the sum of the first reliability when it is determined that the three- sided survey is established and the second reliability when both the first transmission / reception unit and the second transmission / reception unit receive the indirect wave. It is provided with an object determination unit that calculates a certain sum for determination and determines the existence of an object based on the sum for determination.

このように、本発明の物体検出装置では、物体判定部が、直接波を受信して三測量が可能な場合のみならず、第1送受信部及び第2送受信部の両方が間接波を受信した場合でも第2信頼度によって判定用総和を増加させている。これにより、物体検出装置は、間接波しか受信できなかった場合の間接波を利用して、物体の存在を判定することができる。 As described above, in the object detection device of the present invention, not only the case where the object determination unit receives the direct wave and the three- sided measurement is possible, but also both the first transmission / reception unit and the second transmission / reception unit receive the indirect wave. Even if this is the case, the sum of judgments is increased by the second reliability. As a result, the object detection device can determine the existence of the object by using the indirect wave when only the indirect wave can be received.

上述の本発明の物体検出装置において、前記物体判定部は、前記判定結果が前記第1送受信部及び前記第2送受信部の両方が前記間接波を受信したことを示し、前記判定結果に基づいて前記三測量が成立しないと判定すると、前記第2信頼度を前記判定用総和に足してもよい。 In the above-mentioned object detection device of the present invention, the object determination unit indicates that both the first transmission / reception unit and the second transmission / reception unit have received the indirect wave, and the determination result is based on the determination result. If it is determined that the three- sided survey does not hold, the second reliability may be added to the total for determination.

このように、本発明の物体検出装置では、物体判定部が、三測量が成立すると判定した場合、第1信頼度を判定用総和に足し、三測量が成立しないと判定した場合、第2信頼度を判定用総和に足す。これにより、物体検出装置は、判定用総和に第1信頼度及び第2信頼度が一度に足されることを抑制して、物体の存在の判定精度を向上させることができる。 As described above, in the object detection device of the present invention, when the object determination unit determines that the three- sided survey is established, the first reliability is added to the total for determination, and when it is determined that the three- sided survey is not established, the first 2 Add the reliability to the sum for judgment. As a result, the object detection device can suppress the addition of the first reliability and the second reliability to the sum of determinations at once, and can improve the accuracy of determining the existence of the object.

上述の本発明の物体検出装置において、前記物体判定部は、前記三測量が成立すると判定した場合、前記判定用総和に基づいて前記物体の存在を判定してもよい。 In the above-mentioned object detection device of the present invention, when the object determination unit determines that the three- sided survey is established, the existence of the object may be determined based on the summation for determination.

このように、本発明の物体検出装置では、物体判定部は、直接波を受信できた三測量が成立する場合に、物体の存在を判定するので、物体検出装置は、より精度の高い物体の存在判定を実行することができる。また、物体検出装置では、物体判定部は、三測量が成立しないと判定した場合でも、第2信頼度を判定用総和に足すので、三測量が成立した場合、既に第2信頼度が足された判定用総和に基づいて物体の存在を短時間で確定することができる。 As described above, in the object detection device of the present invention, the object determination unit determines the existence of the object when the three- sided survey that can directly receive the wave is established, so that the object detection device is a more accurate object. The existence of can be determined. Further, in the object detection device, even if the object determination unit determines that the three- sided survey is not established, the second reliability is added to the total for determination. Therefore, when the three- sided survey is established, the second reliability is already established. The existence of the object can be determined in a short time based on the added sum for determination.

上述の本発明の物体検出装置において、前記物体判定部は、前記判定結果が前記第1送受信部及び前記第2送受信部の両方が前記間接波を受信し、かつ、前記直接波を受信していないことを示していると、前記第2信頼度を前記判定用総和に足してもよい。 In the object detection device of the present invention described above, in the object determination unit, both the first transmission / reception unit and the second transmission / reception unit receive the indirect wave and the direct wave as the determination result. If it is shown that there is no such second reliability, the second reliability may be added to the total for determination.

このように、本発明の物体検出装置では、物体判定部が、三測量が成立すると判定した場合、第1信頼度を判定用総和に足し、第1送受信部及び第2送受信部の両方が間接波を受信し、かつ、直接波を受信していない場合、第2信頼度を判定用総和に足す。これにより、物体検出装置は、判定用総和に第1信頼度及び第2信頼度が一度に足されることを抑制して、物体の存在の判定精度を向上させることができる。また、物体検出装置は、第1送受信部及び第2送受信部の両方が直接波を受信していない場合、物体の位置が第1送受信部及び第2送受信部の探査波の送信方向上ではなく、即ち、第1送受信部及び第2送受信部の間と判定することができる。従って、物体検出装置は、第2信頼度を判定用総和に足して、物体の存在を判定した場合、物体の位置が第1送受信部及び第2送受信部の間と判定できる。 As described above, in the object detection device of the present invention, when the object determination unit determines that the three- sided survey is established, the first reliability is added to the total determination amount, and both the first transmission / reception unit and the second transmission / reception unit perform. When the indirect wave is received and the direct wave is not received, the second reliability is added to the sum for determination. As a result, the object detection device can suppress the addition of the first reliability and the second reliability to the sum of determinations at once, and can improve the accuracy of determining the existence of the object. Further, in the object detection device, when both the first transmission / reception unit and the second transmission / reception unit do not directly receive the wave, the position of the object is not on the transmission direction of the exploration wave of the first transmission / reception unit and the second transmission / reception unit. That is, it can be determined between the first transmission / reception unit and the second transmission / reception unit. Therefore, when the object detection device adds the second reliability to the total for determination and determines the existence of the object, the object detection device can determine that the position of the object is between the first transmission / reception unit and the second transmission / reception unit.

上述の本発明の物体検出装置において、前記物体判定部は、前記第1信頼度と、前記第1信頼度以下の前記第2信頼度とに基づいて前記判定用総和を算出してもよい。 In the above-mentioned object detection device of the present invention, the object determination unit may calculate the determination sum based on the first reliability and the second reliability of the first reliability or less.

これにより、本発明の物体検出装置は、三測量が成立する場合の第1信頼度を重視して、物体の存在を判定できる。 As a result, the object detection device of the present invention can determine the existence of an object with an emphasis on the first reliability when the three- sided survey is established.

上述の本発明の物体検出装置において、前記探査波判定部は、前記第1送受信部及び前記第2送受信部の外側の両側に配置され、前記探査波を送受信する第3送受信部及び第4送受信部から取得した前記探査波に関する送受信情報に基づいて、前記第3送受信部及び前記第4送受信部が前記間接波を受信したか否かを判定し、前記物体判定部は、前記判定結果が、前記第1送受信部及び前記第2送受信部の両方が前記間接波を受信したことを示し、かつ、前記第3送受信部及び前記第4送受信部の両方が前記間接波を受信していないことを示す場合、前記第2信頼度を前記判定用総和に足してもよい。 In the above-mentioned object detection device of the present invention, the exploration wave determination unit is arranged on both sides outside the first transmission / reception unit and the second transmission / reception unit, and the third transmission / reception unit and the fourth transmission / reception unit for transmitting / receiving the exploration wave. Based on the transmission / reception information regarding the exploration wave acquired from the unit, it is determined whether or not the third transmission / reception unit and the fourth transmission / reception unit have received the indirect wave. It indicates that both the first transmission / reception unit and the second transmission / reception unit have received the indirect wave, and that both the third transmission / reception unit and the fourth transmission / reception unit have not received the indirect wave. When shown, the second reliability may be added to the total for determination.

このように、本発明の物体検出装置では、物体判定部は、外側の第3送受信部及び第4送受信部が間接波を受信していない場合に第2信頼度を判定用総和に足す。これにより、物体検出装置は、三測量が成立しない場合でも、第3送受信部及び第4送受信部が間接波を受信しにくい領域である第1送受信部及び第2送受信部の間に物体が存在すると判定することができる。 As described above, in the object detection device of the present invention, the object determination unit adds the second reliability to the total determination when the outer third transmission / reception unit and the fourth transmission / reception unit do not receive the indirect wave. As a result, in the object detection device, even if the three- sided survey is not established, the object is placed between the first transmission / reception unit and the second transmission / reception unit, which is a region where the third transmission / reception unit and the fourth transmission / reception unit are difficult to receive the indirect wave. It can be determined that it exists.

図1は、第1実施形態の物体検出システムの複数の送受信部が搭載された車両の平面図である。FIG. 1 is a plan view of a vehicle equipped with a plurality of transmission / reception units of the object detection system of the first embodiment. 図2は、物体検出システムの構成を示すブロック図である。FIG. 2 is a block diagram showing a configuration of an object detection system. 図3は、物体検出装置の機能を説明する機能ブロック図である。FIG. 3 is a functional block diagram illustrating the function of the object detection device. 図4は、探査波による遠方の物体の検出・未検出を説明する車両の後側の平面図である。FIG. 4 is a plan view of the rear side of the vehicle for explaining the detection / non-detection of a distant object by the exploration wave. 図5は、遠方の物体によって反射されて受信した探査波を説明するグラフである。FIG. 5 is a graph illustrating exploration waves reflected and received by a distant object. 図6は、探査波による近辺の物体の検出・未検出を説明する車両の後側の平面図である。FIG. 6 is a plan view of the rear side of the vehicle for explaining the detection / non-detection of nearby objects by the exploration wave. 図7は、近辺の物体によって反射されて受信した探査波を説明するグラフである。FIG. 7 is a graph illustrating an exploration wave reflected and received by a nearby object. 図8は、閾値波高と送受信時間との関係を示すグラフである。FIG. 8 is a graph showing the relationship between the threshold wave height and the transmission / reception time. 図9は、処理部が実行する第1実施形態の物体検出処理のフローチャートである。FIG. 9 is a flowchart of the object detection process of the first embodiment executed by the processing unit. 図10は、処理部が実行する第2実施形態の物体検出処理のフローチャートである。FIG. 10 is a flowchart of the object detection process of the second embodiment executed by the processing unit. 図11は、処理部が実行する第3実施形態の物体検出処理のフローチャートである。FIG. 11 is a flowchart of the object detection process of the third embodiment executed by the processing unit.

以下の例示的な実施形態等の同様の構成要素には共通の符号を付与して、重複する説明を適宜省略する。 Similar components such as the following exemplary embodiments are given common reference numerals, and duplicate description will be omitted as appropriate.

<第1実施形態>
図1は、第1実施形態の物体検出システムの複数の送受信部14Fa、14Fb、・・・が搭載された車両10の平面図である。図1に矢印で示す方向を、車両10の前後左右方向とする。
<First Embodiment>
FIG. 1 is a plan view of a vehicle 10 on which a plurality of transmission / reception units 14Fa, 14Fb, ... Of the object detection system of the first embodiment are mounted. The direction indicated by the arrow in FIG. 1 is the front-rear, left-right direction of the vehicle 10.

図1に示すように、複数の送受信部14Ra、14Rb、14Rc、14Rd、14Fa、14Fb、14Fc、14Fdが、車両10の外周部に設けられている。送受信部14を区別する必要がない場合、送受信部14R、14F、14等と記載する。送受信部14は、車両10の周辺の物体を検出するために周辺に探査波を送受信して、探査波の送受信に関する送受信情報を出力する。 As shown in FIG. 1, a plurality of transmission / reception units 14Ra, 14Rb, 14Rc, 14Rd, 14Fa, 14Fb, 14Fc, and 14Fd are provided on the outer peripheral portion of the vehicle 10. When it is not necessary to distinguish the transmission / reception unit 14, the transmission / reception units 14R, 14F, 14 and the like are described. The transmission / reception unit 14 transmits / receives an exploration wave to the periphery in order to detect an object in the vicinity of the vehicle 10, and outputs transmission / reception information regarding transmission / reception of the exploration wave.

例えば、4個の送受信部14Ra、14Rb、14Rc、14Rdが、左右方向に沿って一定の間隔をあけて車体12の後端部に設けられている。具体的には、送受信部14Rb、14Rcが左右方向の中央部に配置され、送受信部14Ra、14Rdが送受信部14Rb、14Rcの外側の両側に配置されている。送受信部14Rb、14Rcが第1送受信部及び第2送受信部の一例である。別の4個の送受信部14Fa、14Fb、14Fc、14Fdが、左右方向に沿って一定の間隔をあけて車両10の車体12の前端部に設けられている。具体的には、送受信部14Fb、14Fcが左右方向の中央部に配置され、送受信部14Fa、14Fdが送受信部14Fb、14Fcの外側の両側に配置されている。 For example, four transmission / reception units 14Ra, 14Rb, 14Rc, and 14Rd are provided at the rear end portion of the vehicle body 12 at regular intervals along the left-right direction. Specifically, the transmission / reception units 14Rb and 14Rc are arranged in the central portion in the left-right direction, and the transmission / reception units 14Ra and 14Rd are arranged on both outer sides of the transmission / reception units 14Rb and 14Rc. The transmission / reception units 14Rb and 14Rc are examples of the first transmission / reception unit and the second transmission / reception unit. Another four transmission / reception portions 14Fa, 14Fb, 14Fc, and 14Fd are provided at the front end portion of the vehicle body 12 of the vehicle 10 at regular intervals along the left-right direction. Specifically, the transmission / reception units 14Fb and 14Fc are arranged in the central portion in the left-right direction, and the transmission / reception units 14Fa and 14Fd are arranged on both outer sides of the transmission / reception units 14Fb and 14Fc.

送受信部14は、例えば、超音波等の探査波を送信するセンサまたはソナーである。例えば、送受信部14Rは、後方に探査波を送信する。送受信部14Fは、前方に探査波を送信する。尚、各送受信部14は、後方または前方のうち、左右方向(例えば、外側)に傾斜した方向に探査波を送信してもよい。各送受信部14は、時間をずらして探査波を送信する。例えば、送受信部14Ra、14Rdが最初に探査波を送信して、次に、一定の時間(以下、送信間隔)をあけて送受信部14Rbが探査波を送信して、更に送信間隔後に送受信部14Rcが探査波を送信する。送信間隔は、検出範囲内の物体を検出するために最低限必要な探査波の送受信時間以上の時間であれば適宜設定してよい。送受信部14は、物体によって反射された探査波を受信する。ここで、送受信部14は、自身が送信して物体に反射された探査波(以下、直接波)、及び、他の送受信部14が送信して物体に反射された探査波(以下、間接波)を受信する。送受信部14は、自身が送信した送信時刻、探査波を受信した受信時刻、及び、受信した探査波の強度である波高の情報を含む送受信情報を出力する。 The transmission / reception unit 14 is, for example, a sensor or sonar that transmits an exploration wave such as an ultrasonic wave. For example, the transmission / reception unit 14R transmits an exploration wave to the rear. The transmission / reception unit 14F transmits an exploration wave forward. In addition, each transmission / reception unit 14 may transmit the exploration wave in the direction inclined in the left-right direction (for example, the outside) in the rear or the front. Each transmission / reception unit 14 transmits the exploration wave at different times. For example, the transmission / reception units 14Ra and 14Rd first transmit the exploration wave, then the transmission / reception unit 14Rb transmits the exploration wave after a certain time (hereinafter, transmission interval), and then the transmission / reception unit 14Rc after the transmission interval. Sends exploration waves. The transmission interval may be appropriately set as long as it is longer than the minimum transmission / reception time of the exploration wave required to detect an object within the detection range. The transmission / reception unit 14 receives the exploration wave reflected by the object. Here, the transmission / reception unit 14 transmits the exploration wave (hereinafter, direct wave) transmitted by itself and reflected on the object, and the exploration wave (hereinafter, indirect wave) transmitted by the other transmission / reception unit 14 and reflected on the object. ) Is received. The transmission / reception unit 14 outputs transmission / reception information including information on the transmission time transmitted by itself, the reception time when the exploration wave is received, and the wave height which is the intensity of the received exploration wave.

図2は、物体検出システム16の構成を示すブロック図である。物体検出システム16は、車両10の周辺の障害物等の物体を検出して、ブレーキ等の制動部92を含む制動システム90に検出した物体の情報を出力することにより、車両10と物体との衝突を回避する。図2に示すように、物体検出システム16は、複数の送受信部14と、物体検出装置20と、車内ネットワーク22とを備える。 FIG. 2 is a block diagram showing the configuration of the object detection system 16. The object detection system 16 detects an object such as an obstacle around the vehicle 10 and outputs information on the detected object to the braking system 90 including the braking unit 92 such as a brake, thereby causing the vehicle 10 and the object to interact with each other. Avoid collisions. As shown in FIG. 2, the object detection system 16 includes a plurality of transmission / reception units 14, an object detection device 20, and an in-vehicle network 22.

複数の送受信部14は、車内ネットワーク22に接続されている。複数の送受信部14は、車内ネットワーク22を介して、送受信情報を物体検出装置20へ送信する。 The plurality of transmission / reception units 14 are connected to the in-vehicle network 22. The plurality of transmission / reception units 14 transmit transmission / reception information to the object detection device 20 via the in-vehicle network 22.

物体検出装置20は、複数の送受信部14のそれぞれから取得した送受信情報が示す送信時刻、受信時刻、及び、波高に基づいて、物体の存在及び物体の位置を判定する。物体検出装置20は、検出した物体に関する情報を制動部制御部94等へ出力して、車両10の衝突を抑制する。 The object detection device 20 determines the existence of the object and the position of the object based on the transmission time, the reception time, and the wave height indicated by the transmission / reception information acquired from each of the plurality of transmission / reception units 14. The object detection device 20 outputs information about the detected object to the braking unit control unit 94 and the like to suppress the collision of the vehicle 10.

物体検出装置20は、ECU(Electronic Control Unit)等のマイクロコンピュータを含むコンピュータである。物体検出装置20は、CPU(Central Processing Unit)20aと、ROM(Read Only Memory)20bと、RAM(Random Access Memory)20cと、SSD(Solid State Drive)20fとを備える。CPU20a、ROM20b及びRAM20cは、同一パッケージ内に集積されていてもよい。 The object detection device 20 is a computer including a microcomputer such as an ECU (Electronic Control Unit). The object detection device 20 includes a CPU (Central Processing Unit) 20a, a ROM (Read Only Memory) 20b, a RAM (Random Access Memory) 20c, and an SSD (Solid State Drive) 20f. The CPU 20a, ROM 20b and RAM 20c may be integrated in the same package.

CPU20aは、ハードウェアプロセッサの一例であって、ROM20b等の不揮発性の記憶装置に記憶されたプログラムを読み出して、当該プログラムにしたがって各種の演算処理および制御を実行する。 The CPU 20a is an example of a hardware processor, reads a program stored in a non-volatile storage device such as a ROM 20b, and executes various arithmetic processes and controls according to the program.

ROM20bは、各プログラム及びプログラムの実行に必要なパラメータ等を記憶する。RAM20cは、CPU20aでの演算で用いられる各種のデータを一時的に記憶する。SSD20fは、書き換え可能な不揮発性の記憶装置であって、物体検出装置20の電源がオフされた場合にあってもデータを維持する。 The ROM 20b stores each program and parameters and the like necessary for executing the program. The RAM 20c temporarily stores various data used in the calculation by the CPU 20a. The SSD 20f is a rewritable non-volatile storage device, and maintains data even when the power of the object detection device 20 is turned off.

車内ネットワーク22は、例えば、CAN(Controller Area Network)である。車内ネットワーク22は、複数の送受信部14、物体検出装置20、及び、制動部制御部94を互いに信号及び情報を送受信可能に電気的に接続する。 The in-vehicle network 22 is, for example, CAN (Controller Area Network). The in-vehicle network 22 electrically connects a plurality of transmission / reception units 14, an object detection device 20, and a braking unit control unit 94 so as to be able to transmit and receive signals and information to each other.

制動システム90は、制動部92と、制動部制御部94とを有する。 The braking system 90 has a braking unit 92 and a braking unit control unit 94.

制動部制御部94は、ECU等のコンピュータである。制動部制御部94は、車内ネットワーク22に接続されている。制動部制御部94は、ブレーキ等の制動部92と情報を送信可能に接続されている。制動部制御部94は、車内ネットワーク22を介して、物体検出装置20が検出した車両10の周辺の物体の位置または有無に関する物体情報を取得する。制動部制御部94は、取得した物体情報に基づいて、制動部92に制御信号を送信して制御する。 The braking unit control unit 94 is a computer such as an ECU. The braking unit control unit 94 is connected to the in-vehicle network 22. The braking unit control unit 94 is connected to the braking unit 92 such as a brake so as to be able to transmit information. The braking unit control unit 94 acquires object information regarding the position or presence / absence of an object around the vehicle 10 detected by the object detection device 20 via the in-vehicle network 22. The braking unit control unit 94 transmits a control signal to the braking unit 92 to control the braking unit 92 based on the acquired object information.

図3は、物体検出装置20の機能を説明する機能ブロック図である。図3に示すように、物体検出装置20は、処理部24と、記憶部26とを有する。 FIG. 3 is a functional block diagram illustrating the function of the object detection device 20. As shown in FIG. 3, the object detection device 20 has a processing unit 24 and a storage unit 26.

処理部24は、例えば、CPU20aの機能として実現される。処理部24は、探査波判定部30と、物体判定部32とを有する。処理部24は、例えば、記憶部26に格納された物体検出プログラム34を読み込むことによって、探査波判定部30及び物体判定部32として機能してよい。探査波判定部30及び物体判定部32の一部または全部は、ASIC(Application Specific Integrated Circuit)、または、FPGA(Field-Programmable Gate Array)を含む回路等のハードウェアによって構成してもよい。 The processing unit 24 is realized, for example, as a function of the CPU 20a. The processing unit 24 has an exploration wave determination unit 30 and an object determination unit 32. The processing unit 24 may function as the exploration wave determination unit 30 and the object determination unit 32 by reading the object detection program 34 stored in the storage unit 26, for example. A part or all of the exploration wave determination unit 30 and the object determination unit 32 may be configured by hardware such as an ASIC (Application Specific Integrated Circuit) or a circuit including an FPGA (Field-Programmable Gate Array).

探査波判定部30は、送受信部14から取得した送受信情報に基づいて、各送受信部14が受信した探査波が直接波か間接波かを判定する。具体的には、探査波判定部30は、自身が送信した探査波の送信時刻、探査波を受信した受信時刻、及び、受信した探査波の強度である波高を示す送受信情報を各送受信部14から取得する。探査波判定部30は、いずれかの送受信部14の受信時刻が自身の送信時刻から予め定められた判定時間(例えば、送信間隔)内であれば、当該送受信部14が受信した探査波を直接波と判定し、それ以外の送受信部14が受信した探査波を間接波と判定してよい。尚、判定時間は、一の送受信部14と他の送受信部14との送信間隔よりも長い。換言すれば、いずれかの送受信部14が探査波を送信した送信時刻から判定時間までの間、他の送受信部14は、探査波を送信しない。探査波判定部30は、各送受信部14に探査波を送信する指示信号を出力して、送信間隔を制御してもよい。探査波判定部30は、全ての送受信部14から送受信情報を取得すると、各送受信部14が受信した探査波が直接波か間接波かを判定した判定結果とともに、送受信情報を物体判定部32へ出力する。 The exploration wave determination unit 30 determines whether the exploration wave received by each transmission / reception unit 14 is a direct wave or an indirect wave based on the transmission / reception information acquired from the transmission / reception unit 14. Specifically, the exploration wave determination unit 30 transmits and receives transmission / reception information indicating the transmission time of the exploration wave transmitted by itself, the reception time of receiving the exploration wave, and the wave height which is the intensity of the received exploration wave. Get from. If the reception time of any of the transmission / reception units 14 is within a predetermined determination time (for example, transmission interval) from its own transmission time, the exploration wave determination unit 30 directly transmits the exploration wave received by the transmission / reception unit 14. It may be determined that it is a wave, and the exploration wave received by the transmission / reception unit 14 other than that may be determined as an indirect wave. The determination time is longer than the transmission interval between one transmission / reception unit 14 and the other transmission / reception unit 14. In other words, during the period from the transmission time when one of the transmission / reception units 14 transmits the exploration wave to the determination time, the other transmission / reception unit 14 does not transmit the exploration wave. The exploration wave determination unit 30 may output an instruction signal for transmitting an exploration wave to each transmission / reception unit 14 to control the transmission interval. When the exploration wave determination unit 30 acquires transmission / reception information from all transmission / reception units 14, the exploration wave determination unit 30 transmits the transmission / reception information to the object determination unit 32 together with a determination result of determining whether the exploration wave received by each transmission / reception unit 14 is a direct wave or an indirect wave. Output.

物体判定部32は、探査波判定部30から取得した判定結果及び送受信情報に基づいて、車両10の周辺の物体の存在を判定する。具体的には、物体判定部32は、判定結果に基づいて、三測量が成立すると判定した場合の第1信頼度と、送受信部14Rb、14Rcの両方が間接波を受信した場合の第2信頼度との和である判定用総和を算出して、当該判定用総和に基づいて、物体の存在を判定する。例えば、判定結果が、隣接する一対の送受信部14Rb、14Rcのうち一方の送受信部14Rが直接波を受信して他方の送受信部14Rが間接波を受信していることを示している場合、物体判定部32は、判定結果に基づいて三測量が成立すると判定して、第1信頼度を判定用総和に足す。尚、物体判定部32は、上記の条件とともに、当該直接波及び間接波の波高が閾値波高以上の場合に、第1信頼度を判定用総和に足してもよい。一方、判定結果が、隣接する一対の送受信部14Rb、14Rcの両方が直接波を受信していないこと及び間接波を受信したことを示している場合、物体判定部32は三測量が成立しないと判定して第2信頼度を判定用総和に足す。尚、物体判定部32は、上記の条件とともに、間接波の波高が閾値波高以上であって、隣接する一対の送受信部14Rb、14Rcの両方が直接波を受信していない場合に、第2信頼度を判定用総和に足してもよい。第1信頼度及び第2信頼度は、予め定められた数値であって、数値データ36の一部として記憶部26に格納されていてよい。第2信頼度は、例えば、第1信頼度以下である。例えば、第1信頼度が“3”の場合、第2信頼度は3以下1以上の数値であってよい。 The object determination unit 32 determines the existence of an object around the vehicle 10 based on the determination result and transmission / reception information acquired from the exploration wave determination unit 30. Specifically, the object determination unit 32 has a first reliability when it is determined that the three- sided survey is established based on the determination result, and a second when both the transmission / reception units 14Rb and 14Rc receive the indirect wave. The sum of the determinations, which is the sum of the reliability, is calculated, and the existence of the object is determined based on the sum of the determinations. For example, when the determination result indicates that one of the pair of transmission / reception units 14Rb and 14Rc adjacent to the transmission / reception unit 14R receives the direct wave and the other transmission / reception unit 14R receives the indirect wave, the object. The determination unit 32 determines that the three- sided survey is established based on the determination result, and adds the first reliability to the total determination. In addition to the above conditions, the object determination unit 32 may add the first reliability to the total determination when the wave heights of the direct wave and the indirect wave are equal to or higher than the threshold value. On the other hand, if the determination result indicates that both of the adjacent pair of transmission / reception units 14Rb and 14Rc have not received the direct wave and the indirect wave has been received, the object determination unit 32 does not establish the three- sided survey. And add the second reliability to the sum for judgment. In addition, the object determination unit 32 has the above condition, and when the wave height of the indirect wave is equal to or higher than the threshold wave height and both the pair of transmission / reception units 14Rb and 14Rc adjacent to each other do not receive the direct wave, the second reliability is obtained. The degree may be added to the sum of judgments. The first reliability and the second reliability are predetermined numerical values and may be stored in the storage unit 26 as a part of the numerical data 36. The second reliability is, for example, equal to or less than the first reliability. For example, when the first reliability is "3", the second reliability may be a numerical value of 3 or less and 1 or more.

物体判定部32は、判定用総和が閾値信頼度以上となった場合、物体が存在すると判定する。閾値信頼度は、予め定められた数値であって、数値データ36の一部として記憶部26に格納されていてよい。閾値信頼度は、例えば、10以上15以下の数値であってよい。物体判定部32は、物体が存在すると判定すると、車内ネットワーク22を介して、物体が存在する旨の判定結果を制動部制御部94へ出力する。 The object determination unit 32 determines that an object exists when the total determination value is equal to or higher than the threshold reliability. The threshold reliability is a predetermined numerical value and may be stored in the storage unit 26 as a part of the numerical data 36. The threshold reliability may be, for example, a numerical value of 10 or more and 15 or less. When the object determination unit 32 determines that an object exists, it outputs a determination result indicating that the object exists to the braking unit control unit 94 via the in-vehicle network 22.

記憶部26は、処理部24が実行するプログラム、プログラムの実行に必要なデータを記憶する。例えば、記憶部26は、処理部24が実行する物体検出プログラム34を記憶する。記憶部26は、物体検出プログラム34の実行に必要な信頼度、閾値、及び、判定時間等を含む数値データ36を記憶する。 The storage unit 26 stores a program executed by the processing unit 24 and data necessary for executing the program. For example, the storage unit 26 stores the object detection program 34 executed by the processing unit 24. The storage unit 26 stores numerical data 36 including the reliability, the threshold value, the determination time, and the like necessary for executing the object detection program 34.

制動部制御部94は、物体判定部32から物体が判定する旨の判定結果を物体判定部32から取得すると、制動部92を制御して、車両10を停車させる。 When the braking unit control unit 94 acquires the determination result that the object is determined from the object determination unit 32 from the object determination unit 32, the braking unit control unit 94 controls the braking unit 92 to stop the vehicle 10.

図4は、探査波による遠方の物体OJの検出・未検出を説明する車両10の後側の平面図である。図5は、遠方の物体OJによって反射されて受信した探査波を説明するグラフである。図4及び図5は、車両10と物体OJとの距離が長い場合の図である。物体OJは、車体12の後端部から2mの位置に配置されている。 FIG. 4 is a plan view of the rear side of the vehicle 10 for explaining the detection / non-detection of the distant object OJ by the exploration wave. FIG. 5 is a graph illustrating an exploration wave reflected and received by a distant object OJ. 4 and 5 are views when the distance between the vehicle 10 and the object OJ is long. The object OJ is arranged at a position 2 m from the rear end portion of the vehicle body 12.

図4において、二点鎖線は探査波の進路を示す。一点鎖線は、左右方向における車体12の中心CEを示す。車両10の左右方向の幅である車幅は、Wacm(例えば、73cm)である。送受信部14Rb、14Rcは、車体12の中心CEからPacm(例えば、23cm)の位置に配置されている。送受信部14Ra、14Rdは、車体12の中心CEからPbcm(例えば、62cm)の位置に配置されている。車体12の中心CEは、左右方向において、物体OJの中心と同じ位置である。物体OJの左右方向の幅は、Wbcm(例えば、40cm)の壁である。ここで、2×Wa<Wbである。従って、物体OJは、左右方向において、送受信部14Rb、14Rcの間に配置されている。 In FIG. 4, the alternate long and short dash line indicates the course of the exploration wave. The alternate long and short dash line indicates the central CE of the vehicle body 12 in the left-right direction. The vehicle width, which is the width of the vehicle 10 in the left-right direction, is Wacm (for example, 73 cm). The transmission / reception units 14Rb and 14Rc are arranged at a position of Pacm (for example, 23 cm) from the center CE of the vehicle body 12. The transmission / reception units 14Ra and 14Rd are arranged at a position Pb cm (for example, 62 cm) from the center CE of the vehicle body 12. The center CE of the vehicle body 12 is at the same position as the center of the object OJ in the left-right direction. The width of the object OJ in the left-right direction is a wall of Wb cm (for example, 40 cm). Here, 2 × Wa <Wb. Therefore, the object OJ is arranged between the transmission / reception units 14Rb and 14Rc in the left-right direction.

図5の縦軸は受信した探査波の強度を示す。図5の左図は直接波の受信の強度を示し、右図は間接波の受信の強度を示す。 The vertical axis of FIG. 5 shows the intensity of the received exploration wave. The left figure of FIG. 5 shows the reception intensity of the direct wave, and the right figure shows the reception intensity of the indirect wave.

図5の左図の横軸の各符号は以下の通りである。
W1a :送受信部14Raが受信した直接波。
W1b :送受信部14Rbが受信した直接波。
W1c :送受信部14Rcが受信した直接波。
W1d :送受信部14Rdが受信した直接波。
The symbols on the horizontal axis in the left figure of FIG. 5 are as follows.
W1a: Direct wave received by the transmission / reception unit 14Ra.
W1b: Direct wave received by the transmission / reception unit 14Rb.
W1c: Direct wave received by the transmission / reception unit 14Rc.
W1d: Direct wave received by the transmission / reception unit 14Rd.

図5の右図の横軸の各符号は以下の通りである。
W2a:送受信部14Raが送信し、送受信部14Rbが受信した間接波。
W2b:送受信部14Rbが送信し、送受信部14Raが受信した間接波。
W2c:送受信部14Rbが送信し、送受信部14Rcが受信した間接波。
W2d:送受信部14Rcが送信し、送受信部14Rbが受信した間接波。
W2e:送受信部14Rcが送信し、送受信部14Rdが受信した間接波。
W2f:送受信部14Rdが送信し、送受信部14Rcが受信した間接波。
The symbols on the horizontal axis in the right figure of FIG. 5 are as follows.
W2a: An indirect wave transmitted by the transmission / reception unit 14Ra and received by the transmission / reception unit 14Rb.
W2b: An indirect wave transmitted by the transmission / reception unit 14Rb and received by the transmission / reception unit 14Ra.
W2c: An indirect wave transmitted by the transmission / reception unit 14Rb and received by the transmission / reception unit 14Rc.
W2d: An indirect wave transmitted by the transmission / reception unit 14Rc and received by the transmission / reception unit 14Rb.
W2e: An indirect wave transmitted by the transmission / reception unit 14Rc and received by the transmission / reception unit 14Rd.
W2f: An indirect wave transmitted by the transmission / reception unit 14Rd and received by the transmission / reception unit 14Rc.

図4及び図5に示すように、車体12と物体OJとの間の距離が2mの場合、送受信部14Rbは、送受信部14Rcが送信した探査波である間接波を受信する。送受信部14Rcは、送受信部14Rbが送信した探査波である間接波を受信する。送受信部14Rb、14Rcは、自身が送信した探査波である直接波を受信しない。尚、車体12のコーナーに設けられた送受信部14Ra、14Rdは直接波を受信しているが、送受信部14Rb、14Rcは送受信部14Ra、14Rdが送信した探査波を間接波として受信していない。送受信部14Ra、14Rdが受信した直接波は路面によって反射された探査波の可能性が高い。従って、当該直接波による物体OJの検出は、信頼度が低い。また、送受信部14Raは間接波を受信しているが、路面等によって反射された間接波と考えられ、当該間接波による物体OJの検出は信頼度が低い。従って、物体判定部32は、当該直接波及び間接波を閾値波高によって排除するので、当該探査波を受信しても判定用総和に信頼度を足さない。 As shown in FIGS. 4 and 5, when the distance between the vehicle body 12 and the object OJ is 2 m, the transmission / reception unit 14Rb receives an indirect wave which is an exploration wave transmitted by the transmission / reception unit 14Rc. The transmission / reception unit 14Rc receives an indirect wave which is an exploration wave transmitted by the transmission / reception unit 14Rb. The transmission / reception units 14Rb and 14Rc do not receive the direct wave which is the exploration wave transmitted by themselves. The transmission / reception units 14Ra and 14Rd provided at the corners of the vehicle body 12 receive direct waves, but the transmission / reception units 14Rb and 14Rc do not receive the exploration waves transmitted by the transmission / reception units 14Ra and 14Rd as indirect waves. The direct wave received by the transmission / reception units 14Ra and 14Rd is likely to be an exploration wave reflected by the road surface. Therefore, the detection of the object OJ by the direct wave has low reliability. Further, although the transmission / reception unit 14Ra receives the indirect wave, it is considered to be an indirect wave reflected by the road surface or the like, and the detection of the object OJ by the indirect wave has low reliability. Therefore, since the object determination unit 32 excludes the direct wave and the indirect wave by the threshold wave height, the reliability is not added to the determination sum even if the exploration wave is received.

本実施形態では、図4及び図5に示すように、送受信部14Rb、14Rcが間接波を受信して、直接波を受信していない場合、物体判定部32は第2信頼度を判定用総和に足す。 In the present embodiment, as shown in FIGS. 4 and 5, when the transmission / reception units 14Rb and 14Rc receive the indirect wave and do not receive the direct wave, the object determination unit 32 determines the second reliability for determination. Add to.

図6は、探査波による近辺の物体OJの検出・未検出を説明する車両10の後側の平面図である。図7は、近辺の物体OJによって反射されて受信した探査波を説明するグラフである。図6及び図7は、車両10と物体OJとの距離が短い場合の図である。物体OJは、車体12の後端部から1mの位置に配置されている。物体OJと車体12との距離以外の図6及び図7の状況は、図4及び図5と同様である。 FIG. 6 is a plan view of the rear side of the vehicle 10 for explaining the detection / non-detection of the nearby object OJ by the exploration wave. FIG. 7 is a graph illustrating an exploration wave reflected and received by a nearby object OJ. 6 and 7 are views when the distance between the vehicle 10 and the object OJ is short. The object OJ is arranged at a position 1 m from the rear end portion of the vehicle body 12. The situations of FIGS. 6 and 7 other than the distance between the object OJ and the vehicle body 12 are the same as those of FIGS. 4 and 5.

図6及び図7に示すように、車体12と物体OJとの間の距離が1mの場合、送受信部14Rbは、自身が送信した探査波である直接波を受信するとともに、送受信部14Rcが送信した探査波である間接波を受信する。送受信部14Rcは、自身が送信した探査波である直接波を受信するとともに、送受信部14Rbが送信した探査波である間接波を受信する。この場合、物体判定部32は、三測量が成立すると判定する。 As shown in FIGS. 6 and 7, when the distance between the vehicle body 12 and the object OJ is 1 m, the transmission / reception unit 14Rb receives the direct wave which is the exploration wave transmitted by itself, and the transmission / reception unit 14Rc transmits. Receives indirect waves, which are exploration waves. The transmission / reception unit 14Rc receives a direct wave which is an exploration wave transmitted by itself, and also receives an indirect wave which is an exploration wave transmitted by the transmission / reception unit 14Rb. In this case, the object determination unit 32 determines that the three- sided survey is established.

尚、車体12のコーナーに設けられた送受信部14Ra、14Rdは直接波を受信しているが、送受信部14Rb、14Rcは送受信部14Ra、14Rdが送信した探査波を間接波として受信していない。当該直接波は路面によって反射された探査波の可能性が高い。従って、当該直接波による物体OJの検出は、信頼度が低い。また、送受信部14Raは間接波を受信しているが、路面等によって反射された間接波と考えられ、当該間接波による物体OJの検出は信頼度が低い。従って、物体判定部32は、これらの直接波及び間接波を閾値波高によって排除し、これらの探査波を受信しても判定用総和に信頼度を足さない。 The transmission / reception units 14Ra and 14Rd provided at the corners of the vehicle body 12 receive direct waves, but the transmission / reception units 14Rb and 14Rc do not receive the exploration waves transmitted by the transmission / reception units 14Ra and 14Rd as indirect waves. The direct wave is likely to be an exploration wave reflected by the road surface. Therefore, the detection of the object OJ by the direct wave has low reliability. Further, although the transmission / reception unit 14Ra receives the indirect wave, it is considered to be an indirect wave reflected by the road surface or the like, and the detection of the object OJ by the indirect wave has low reliability. Therefore, the object determination unit 32 excludes these direct waves and indirect waves by the threshold wave height, and even if these exploration waves are received, the reliability is not added to the determination sum.

本実施形態では、図6及び図7に示すように、送受信部14Rb、14Rcの一方が直接波を受信して、かつ、送受信部14Rb、14Rcの他方が間接波を受信している場合、物体判定部32は三測量が成立すると判定して第1信頼度を判定用総和に足す。 In this embodiment, as shown in FIGS. 6 and 7, when one of the transmission / reception units 14Rb and 14Rc receives a direct wave and the other of the transmission / reception units 14Rb and 14Rc receives an indirect wave, the object. The determination unit 32 determines that the three- sided survey is established, and adds the first reliability to the total determination.

図8は、閾値波高と送受信時間との関係を示すグラフである。図8の縦軸は、送受信部14が受信した探査波の強度を判定する閾値波高を示す。図8に示す閾値波高は、間接波の閾値波高である。横軸は、送受信部14が送受信した探査波の送受信時間を示す。尚、送受信時間は、物体OJまでの距離と関連する。図8に示す閾値波高は、図4等に示す物体OJによる探査波の受信状況を測定して予め設定された値であってよい。 FIG. 8 is a graph showing the relationship between the threshold wave height and the transmission / reception time. The vertical axis of FIG. 8 shows the threshold wave height for determining the intensity of the exploration wave received by the transmission / reception unit 14. The threshold wave height shown in FIG. 8 is the threshold value wave height of the indirect wave. The horizontal axis shows the transmission / reception time of the exploration wave transmitted / received by the transmission / reception unit 14. The transmission / reception time is related to the distance to the object OJ. The threshold wave height shown in FIG. 8 may be a preset value obtained by measuring the reception state of the exploration wave by the object OJ shown in FIG. 4 or the like.

図8に示すように、閾値波高は、送受信時間とともに変化する。具体的には、閾値波高は、2つのピークPk1、Pk2を有する。第1ピークPk1は、ほぼ“0”の送受信時間で最大値となる。これにより、物体判定部32は、探査波を送信した送受信部14のほぼ真下の路面によって反射された後、受信された探査波を、第1ピークPk1に基づいて破棄する。第2ピークPk2は、数十cmの距離に対応する送受信時間で最大値となる。これにより、物体判定部32は、車両10から数十cm離れた路面上に存在するスピードブレーカー、スピードバンプ及び車輪止め等によって反射された後、受信された探査波を、第2ピークPk2に基づいて破棄する。閾値波高は、送受信時間T以上の遠方で一定値となる。これにより、物体判定部32は、ノイズと考えられる遠方からの波を排除する。尚、直接波の閾値波高は、図8に示す閾値波高とスケールの異なる同様の形状であってよい。 As shown in FIG. 8, the threshold wave height changes with the transmission / reception time. Specifically, the threshold wave height has two peaks Pk1 and Pk2. The first peak Pk1 reaches the maximum value at a transmission / reception time of approximately "0". As a result, the object determination unit 32 discards the received exploration wave based on the first peak Pk1 after being reflected by the road surface substantially directly below the transmission / reception unit 14 that has transmitted the exploration wave. The second peak Pk2 has a maximum value in the transmission / reception time corresponding to a distance of several tens of centimeters. As a result, the object determination unit 32 uses the second peak Pk2 to reflect the received exploration wave after being reflected by the speed breaker, speed bump, wheel chock, etc. existing on the road surface several tens of centimeters away from the vehicle 10. And discard. The threshold wave height becomes a constant value at a distance of the transmission / reception time T or more. As a result, the object determination unit 32 eliminates waves from a distance, which are considered to be noise. The threshold wave height of the direct wave may have a similar shape with a different scale from the threshold value wave height shown in FIG.

図9は、処理部24が実行する第1実施形態の物体検出処理のフローチャートである。処理部24は、記憶部26に格納された物体検出プログラム34を読み込むことによって、物体検出処理を実行する。尚、送受信部14Rが探査波を送信した場合の物体検出処理について説明するが、送受信部14Fが探査波を送信した場合の処理も同様である。 FIG. 9 is a flowchart of the object detection process of the first embodiment executed by the processing unit 24. The processing unit 24 executes the object detection process by reading the object detection program 34 stored in the storage unit 26. The object detection process when the transmission / reception unit 14R transmits the exploration wave will be described, but the process when the transmission / reception unit 14F transmits the exploration wave is also the same.

図9に示すように、物体検出処理では、探査波判定部30が、探査波の送信時刻、受信時刻及び波高に関する情報を含む送受信情報を各送受信部14Rから取得する(S102)。尚、ここで取得する送受信情報は、全ての送受信部14Ra、14Rb、14Rc、14Rdが順に探査波を送信した後、受信した全ての探査波に関する情報である。 As shown in FIG. 9, in the object detection process, the exploration wave determination unit 30 acquires transmission / reception information including information on the transmission time, reception time, and wave height of the exploration wave from each transmission / reception unit 14R (S102). The transmission / reception information acquired here is information about all the exploration waves received after all the transmission / reception units 14Ra, 14Rb, 14Rc, and 14Rd transmit the exploration waves in order.

探査波判定部30は、送受信情報に基づいて、各送受信部14Rが受信した探査波が直接波か間接波かを判定する(S104)。例えば、探査波判定部30は、いずれかの送受信部14Rが探査波を送信した送信時刻から受信時刻までの送受信時間が判定用時間内であれば、当該探査波を送信した送受信部14Rが受信した探査波を直接波と判定し、他の送受信部14Rが受信したそれ以外の探査波を間接波と判定してよい。探査波判定部30は、送受信情報とともに、探査波が直接波か間接波かの判定結果を物体判定部32へ出力する。 The exploration wave determination unit 30 determines whether the exploration wave received by each transmission / reception unit 14R is a direct wave or an indirect wave based on the transmission / reception information (S104). For example, in the exploration wave determination unit 30, if the transmission / reception time from the transmission time at which one of the transmission / reception units 14R transmits the exploration wave to the reception time is within the determination time, the transmission / reception unit 14R that transmits the exploration wave receives the information. The exploration wave may be determined to be a direct wave, and the other exploration waves received by the other transmission / reception unit 14R may be determined to be an indirect wave. The exploration wave determination unit 30 outputs the determination result of whether the exploration wave is a direct wave or an indirect wave to the object determination unit 32 together with the transmission / reception information.

物体判定部32は、探査波判定部30から取得した判定結果に基づいて、三測量が成立するか否かを判定する(S106)。物体判定部32は、例えば、送受信部14Rbが直接波を受信し、かつ、送受信部14Rbと隣接する送受信部14Rcが直接波または間接波を受信している場合、三測量が成立すると判定し、それ以外の場合、三測量が成立しないと判定する。 The object determination unit 32 determines whether or not the three- sided survey is established based on the determination result acquired from the exploration wave determination unit 30 (S106). The object determination unit 32 determines that the three- sided survey is established, for example, when the transmission / reception unit 14Rb receives the direct wave and the transmission / reception unit 14Rc adjacent to the transmission / reception unit 14Rb receives the direct wave or the indirect wave. , In other cases, it is determined that the three- sided survey does not hold.

物体判定部32は、三測量が成立すると判定すると(S106:Yes)、三測量に用いる直接波及び間接波の波高が閾値波高以上か否かを判定する(S108)。物体判定部32は、三測量に用いる直接波及び間接波の両方の波高が閾値波高以上と判定すると(S108:Yes)、判定用総和に第1信頼度を足して(S110)、ステップS120を実行する。物体判定部32は、三測量に用いる直接波及び間接波の波高のいずれかが閾値波高以上でないと判定すると(S108:No)、判定用総和に第1信頼度を足すことなく、ステップS120を実行する。 When the object determination unit 32 determines that the three- sided survey is established (S106: Yes), the object determination unit 32 determines whether or not the wave heights of the direct wave and the indirect wave used for the three- sided survey are equal to or higher than the threshold value (S108). When the object determination unit 32 determines that the wave heights of both the direct wave and the indirect wave used for the three- sided survey are equal to or higher than the threshold value (S108: Yes), the first reliability is added to the total determination amount (S110), and step S120. To execute. When the object determination unit 32 determines that either the height of the direct wave or the indirect wave used for the three- sided survey is not equal to or higher than the threshold value (S108: No), the object determination unit 32 does not add the first reliability to the total determination for determination, and steps S120. To execute.

一方、物体判定部32は、三測量が成立しないと判定すると(S106:No)、送受信情報に基づいて、隣接する一対の送受信部14R(例えば、送受信部14Rb、14Rc)の両方が間接波を受信したか否かを判定する(S111)。物体判定部32は、送受信部14Rb、14Rcの少なくとも一方が間接波を受信していないと判定すると(S111:No)、ステップS120を実行する。 On the other hand, when the object determination unit 32 determines that the three- sided survey is not established (S106: No), both of the adjacent pair of transmission / reception units 14R (for example, transmission / reception units 14Rb and 14Rc) are indirect waves based on the transmission / reception information. Is determined (S111). When the object determination unit 32 determines that at least one of the transmission / reception units 14Rb and 14Rc has not received the indirect wave (S111: No), the object determination unit 32 executes step S120.

物体判定部32は、送受信部14Rb、14Rcの両方が間接波を受信したと判定すると(S111:Yes)、送受信部14Rb、14Rcが受信した間接波の両方の波高が閾値波高以上か否かを判定する(S112)。物体判定部32は、間接波のいずれかの波高が閾値波高以上でないと判定すると(S112:No)、ステップS120を実行する。 When the object determination unit 32 determines that both the transmission / reception units 14Rb and 14Rc have received the indirect wave (S111: Yes), the object determination unit 32 determines whether or not the wave heights of both the indirect waves received by the transmission / reception units 14Rb and 14Rc are equal to or higher than the threshold value. Judgment (S112). When the object determination unit 32 determines that the wave height of any of the indirect waves is not equal to or higher than the threshold value (S112: No), the object determination unit 32 executes step S120.

物体判定部32は、間接波の両方の波高が閾値波高以上であると判定すると(S112:Yes)、送受信部14Rb、14Rcのいずれかが直接波を受信しているか否かを判定する(S114)。物体判定部32は、送受信部14Rb、14Rcのいずれかが直接波を受信していると判定すると(S114:Yes)、ステップS120を実行する。物体判定部32は、送受信部14Rb、14Rcの両方が直接波を受信していないと判定すると(S114:No)、判定用総和に第2信頼度を足して(S116)、ステップS120を実行する。 When the object determination unit 32 determines that both wave heights of the indirect wave are equal to or higher than the threshold wave height (S112: Yes), the object determination unit 32 determines whether or not any of the transmission / reception units 14Rb and 14Rc receives the direct wave (S114). ). When the object determination unit 32 determines that any of the transmission / reception units 14Rb and 14Rc is directly receiving the wave (S114: Yes), the object determination unit 32 executes step S120. When the object determination unit 32 determines that both the transmission / reception units 14Rb and 14Rc have not received the direct wave (S114: No), the object determination unit 32 adds the second reliability to the determination sum (S116), and executes step S120. ..

物体判定部32は、判定用総和が閾値信頼度以上か否かを判定する(S120)。物体判定部32は、判定用総和が閾値信頼度以上でないと判定すると(S120:No)、物体OJの存在が未確定であると判定して(S122)、処理部24は、ステップS102以降を繰り返す。 The object determination unit 32 determines whether or not the total determination value is equal to or higher than the threshold reliability (S120). When the object determination unit 32 determines that the total determination value is not equal to or higher than the threshold reliability (S120: No), the object determination unit 32 determines that the existence of the object OJ is undetermined (S122), and the processing unit 24 performs steps S102 and subsequent steps. repeat.

物体判定部32は、判定用総和が閾値信頼度以上であると判定すると(S120:Yes)、判定用総和をリセットするとともに、物体OJの存在を確定して(S124)、物体OJに関する情報である物体情報を制動部制御部94等へ出力する(S126)。ここで、物体判定部32は、三測量が成立する場合、三測量を実行して物体OJの位置を特定して、物体OJが存在する旨とともに、物体OJの位置を物体情報として制動部制御部94等へ出力してもよい。また、物体判定部32は、三測量が成立しない場合、送受信部14Rb、14Rcの両方が直接波を受信していないので、物体OJの位置が送受信部14Rb、14Rcの探査波の送信方向上でない、即ち、送受信部14Rb、14Rcの間であると判定することができる。この場合、物体判定部32は、物体OJが存在する旨とともに、物体OJの位置が送受信部14Rb、14Rcの間である旨を物体情報として制動部制御部94等へ出力してもよい。制動部制御部94は、物体情報を取得すると、当該物体OJの位置等に応じて、制動部92を制御して、車両10を減速及び停車させる。この後、処理部24は、ステップS102以降を繰り返す。 When the object determination unit 32 determines that the determination sum is equal to or higher than the threshold reliability (S120: Yes), the object determination unit 32 resets the determination sum and determines the existence of the object OJ (S124). A certain object information is output to the braking unit control unit 94 or the like (S126). Here, when the three- sided survey is established, the object determination unit 32 executes the three- sided survey to specify the position of the object OJ, indicates that the object OJ exists, and brakes the position of the object OJ as object information. It may be output to a unit control unit 94 or the like. Further, in the object determination unit 32, when the three- sided survey is not established, both the transmission / reception units 14Rb and 14Rc do not directly receive the wave, so that the position of the object OJ is on the transmission direction of the exploration wave of the transmission / reception units 14Rb and 14Rc. That is, it can be determined that it is between the transmission / reception units 14Rb and 14Rc. In this case, the object determination unit 32 may output to the braking unit control unit 94 or the like as object information that the object OJ exists and that the position of the object OJ is between the transmission / reception units 14Rb and 14Rc. When the braking unit control unit 94 acquires the object information, the braking unit control unit 94 controls the braking unit 92 according to the position of the object OJ and the like to decelerate and stop the vehicle 10. After that, the processing unit 24 repeats steps S102 and subsequent steps.

上述したように、第1実施形態の物体検出装置20では、直接波を受信して三測量が成立する場合のみならず、送受信部14Ra、14Rbの両方が間接波を受信した場合でも、物体判定部32が第2信頼度によって判定用総和を増加させている。これにより、物体検出装置20は、柱またはポール等のように物体OJの幅が送受信部14の間隔よりも狭いため直接波を受信できず、間接波しか受信できない場合でも、間接波を利用して、物体OJの存在を判定することができる。この結果、物体判定部32は、隣接する送受信部14間よりも幅が狭い物体OJを遠方からでも検出することができる。 As described above, in the object detection device 20 of the first embodiment, not only when the direct wave is received and the three- sided survey is established, but also when both the transmission / reception units 14Ra and 14Rb receive the indirect wave, the object. The determination unit 32 increases the total determination for determination according to the second reliability. As a result, the object detection device 20 uses the indirect wave even when the object OJ cannot receive the direct wave because the width of the object OJ is narrower than the distance between the transmission / reception units 14 such as a pillar or a pole, and can only receive the indirect wave. Therefore, the existence of the object OJ can be determined. As a result, the object determination unit 32 can detect an object OJ whose width is narrower than that between the adjacent transmission / reception units 14 even from a distance.

物体検出装置20では、物体判定部32が、三測量が成立すると判定した場合、第1信頼度を判定用総和に足し、三測量が成立しないと判定し、かつ、隣接する送受信部14Rb、14Rcの両方が間接波を受信した場合、第2信頼度を判定用総和に足す。これにより、物体検出装置20は、判定用総和に第1信頼度及び第2信頼度が一度に足されることを抑制して、物体OJの存在の判定精度を向上させることができる。 In the object detection device 20, when the object determination unit 32 determines that the three- sided survey is established, the first reliability is added to the total for determination, it is determined that the three- sided survey is not established, and the adjacent transmission / reception unit 14Rb. When both 14Rc and 14Rc receive the indirect wave, the second reliability is added to the sum for determination. As a result, the object detection device 20 can suppress the addition of the first reliability and the second reliability to the sum of determinations at once, and can improve the determination accuracy of the existence of the object OJ.

物体検出装置20では、物体判定部32が、三測量が成立すると判定した場合、第1信頼度を判定用総和に足し、隣接する送受信部14Rb、14Rcの両方が直接波を受信していない場合、第2信頼度を判定用総和に足す。これにより、物体検出装置20は、判定用総和に第1信頼度及び第2信頼度が一度に足されることを抑制して、物体OJの存在の判定精度を向上させることができる。また、物体検出装置20は、隣接する送受信部14Rb、14Rcの両方が直接波を受信していないことによって、送受信部14Rb、14Rcの間に物体OJが存在すると判定できる。 In the object detection device 20, when the object determination unit 32 determines that the three- sided survey is established, the first reliability is added to the determination sum, and neither of the adjacent transmission / reception units 14Rb and 14Rc receives the direct wave. If so, add the second reliability to the sum of judgments. As a result, the object detection device 20 can suppress the addition of the first reliability and the second reliability to the sum of determinations at once, and can improve the determination accuracy of the existence of the object OJ. Further, the object detection device 20 can determine that the object OJ exists between the transmission / reception units 14Rb and 14Rc because neither of the adjacent transmission / reception units 14Rb and 14Rc directly receives the wave.

物体検出装置20では、物体判定部32が、第1信頼度と、第1信頼度以下の第2信頼度とに基づいて、判定用総和を算出する。これにより、物体検出装置20は、三測量が成立する場合の信頼度を重視して、物体OJの存在を判定できる。 In the object detection device 20, the object determination unit 32 calculates the total determination for determination based on the first reliability and the second reliability equal to or lower than the first reliability. As a result, the object detection device 20 can determine the existence of the object OJ with an emphasis on the reliability when the three- sided survey is established.

<第2実施形態>
上述の第1実施形態の一部を変更した第2実施形態の物体検出装置20について説明する。
<Second Embodiment>
The object detection device 20 of the second embodiment, which is a partial modification of the first embodiment described above, will be described.

第2実施形態の物体判定部32は、三測量が成立すると判定した場合、判定用総和に基づいて物体OJの存在を判定する。一方、物体判定部32は、送受信部14Rb、14Rcの両方が間接波を受信したと判定すると判定用総和に第2信頼度を足すが、三測量が成立しないと判定した場合、物体OJの存在を判定しない。従って、物体判定部32は、判定用総和が閾値信頼度以上となっていても、三測量が成立しないと判定した場合、物体OJの存在を確定しない。 When it is determined that the three- sided survey is established, the object determination unit 32 of the second embodiment determines the existence of the object OJ based on the summation for determination. On the other hand, when the object determination unit 32 determines that both the transmission / reception units 14Rb and 14Rc have received the indirect wave, the second reliability is added to the determination sum, but when it is determined that the three- sided survey is not established, the object OJ Does not determine existence. Therefore, the object determination unit 32 does not determine the existence of the object OJ when it is determined that the three- sided survey is not established even if the determination sum is equal to or higher than the threshold reliability.

図10は、処理部24が実行する第2実施形態の物体検出処理のフローチャートである。第2実施形態の物体検出処理のステップのうち、第1実施形態の物体検出処理と同様のステップについては説明を省略または簡略化する。 FIG. 10 is a flowchart of the object detection process of the second embodiment executed by the processing unit 24. Of the steps of the object detection process of the second embodiment, the same steps as the object detection process of the first embodiment will be omitted or simplified.

図10に示すように、第2実施形態の物体検出処理において、物体判定部32が、三測量が成立しないと判定すると(S106:No)、送受信情報に基づいて、隣接する一対の送受信部14R(例えば、送受信部14Rb、14Rc)の両方が間接波を受信したか否かを判定する(S211)。物体判定部32は、送受信部14Rb、14Rcの少なくとも一方が間接波を受信していないと判定すると(S211:No)、ステップS102に戻って実行する。 As shown in FIG. 10, in the object detection process of the second embodiment, when the object determination unit 32 determines that the three- sided survey is not established (S106: No), a pair of adjacent transmission / reception units based on the transmission / reception information. It is determined whether or not both of the 14Rs (for example, the transmission / reception units 14Rb and 14Rc) have received the indirect wave (S211). When the object determination unit 32 determines that at least one of the transmission / reception units 14Rb and 14Rc has not received the indirect wave (S211: No), the object determination unit 32 returns to step S102 and executes the process.

物体判定部32は、送受信部14Rb、14Rcの両方が間接波を受信したと判定すると(S211:Yes)、送受信部14Rb、14Rcが受信した間接波の両方の波高が閾値波高以上か否かを判定する(S212)。物体判定部32は、間接波のいずれかの波高が閾値波高以上でないと判定すると(S212:No)、ステップS102に戻って実行する。 When the object determination unit 32 determines that both the transmission / reception units 14Rb and 14Rc have received the indirect wave (S211: Yes), the object determination unit 32 determines whether or not the wave heights of both the indirect waves received by the transmission / reception units 14Rb and 14Rc are equal to or higher than the threshold value. Judgment (S212). When the object determination unit 32 determines that the wave height of any of the indirect waves is not equal to or higher than the threshold value (S212: No), the object determination unit 32 returns to step S102 and executes the process.

物体判定部32は、間接波の波高が閾値波高以上であると判定すると(S212:Yes)、送受信部14Rb、14Rcのいずれかが直接波を受信しているか否かを判定する(S214)。物体判定部32は、送受信部14Rb、14Rcのいずれかが直接波を受信していると判定すると(S214:Yes)、ステップS102に戻って実行する。物体判定部32は、送受信部14Rb、14Rcの両方が直接波を受信していないと判定すると(S214:No)、判定用総和に第2信頼度を足して(S216)、ステップS102に戻って実行する。 When the object determination unit 32 determines that the wave height of the indirect wave is equal to or higher than the threshold wave height (S212: Yes), the object determination unit 32 determines whether or not any of the transmission / reception units 14Rb and 14Rc receives the direct wave (S214). When the object determination unit 32 determines that any of the transmission / reception units 14Rb and 14Rc is directly receiving the wave (S214: Yes), the object determination unit 32 returns to step S102 and executes the process. When the object determination unit 32 determines that both the transmission / reception units 14Rb and 14Rc have not received the direct wave (S214: No), the object determination unit 32 adds the second reliability to the determination sum (S216), and returns to step S102. Execute.

一方、物体判定部32は、三測量が成立すると判定すると(S106:Yes)、第1信頼度及び第2信頼度の和である判定用総和が閾値信頼度以上か否かの判定を実行した後(S120)、ステップS122、S124以降を実行する。 On the other hand, when the object determination unit 32 determines that the three- sided survey is established (S106: Yes), the object determination unit 32 determines whether or not the total determination for determination, which is the sum of the first reliability and the second reliability, is equal to or higher than the threshold reliability. After that (S120), steps S122 and S124 and subsequent steps are executed.

このように、第2実施形態の物体検出装置20では、物体判定部32は、三測量が成立しないと判定した場合、判定用総和が閾値信頼度以上か否かを判定せず、三測量が成立すると判定した場合のみ、判定用総和が閾値信頼度以上か否かを判定する。即ち、物体判定部32は、直接波を受信できた三測量が成立する場合のみ、物体OJが存在すると判定するので、第2実施形態の物体検出装置20は、より精度の高い物体OJの存在判定を実行することができる。これにより、制動部制御部94は、より適切に制動部92を制御して、車両10を停車させることができる。 As described above, in the object detection device 20 of the second embodiment, when the object determination unit 32 determines that the three- sided survey is not established, it does not determine whether or not the summation for determination is equal to or higher than the threshold reliability, and the three- sided measurement unit 32 does not determine. Only when it is determined that the survey is established, it is determined whether or not the sum for determination is equal to or higher than the threshold reliability. That is, since the object determination unit 32 determines that the object OJ exists only when the three- sided survey that can directly receive the wave is established, the object detection device 20 of the second embodiment is a more accurate object OJ. Existence determination can be performed. As a result, the braking unit control unit 94 can control the braking unit 92 more appropriately to stop the vehicle 10.

また、物体判定部32は、三測量が成立しないと判定した場合でも、第2信頼度を判定用総和に足すので、三測量が成立した場合、既に第2信頼度が足された判定用総和に基づいて物体OJの存在を短時間で確定することができる。 Further, the object determination unit 32 adds the second reliability to the total for determination even when it is determined that the three- sided survey is not established. Therefore, when the three- sided survey is established, the determination that the second reliability has already been added is added. The existence of the object OJ can be determined in a short time based on the summation.

<第3実施形態>
上述の第1実施形態の一部を変更した第3実施形態の物体検出装置20について説明する。
<Third Embodiment>
The object detection device 20 of the third embodiment, which is a partial modification of the first embodiment described above, will be described.

第3実施形態の物体判定部32は、探査波判定部30の判定結果が、送受信部14Rb、14Rcの両方が直接波を受信していないことを示し、かつ、送受信部14Ra、14Rdの両方が間接波を受信していないことを示す場合、判定用総和に第2信頼度を足す。送受信部14Ra、14Rdが第3送受信部及び第4送受信部の一例である。 The object determination unit 32 of the third embodiment shows that the determination result of the exploration wave determination unit 30 indicates that both the transmission / reception units 14Rb and 14Rc do not receive the direct wave, and both the transmission / reception units 14Ra and 14Rd If it indicates that the indirect wave is not received, the second reliability is added to the sum of judgments. The transmission / reception units 14Ra and 14Rd are examples of the third transmission / reception unit and the fourth transmission / reception unit.

図11は、処理部24が実行する第3実施形態の物体検出処理のフローチャートである。第3実施形態の物体検出処理のステップのうち、第1実施形態の物体検出処理と同様のステップについては説明を省略または簡略化する。 FIG. 11 is a flowchart of the object detection process of the third embodiment executed by the processing unit 24. Of the steps of the object detection process of the third embodiment, the same steps as the object detection process of the first embodiment will be omitted or simplified.

図11に示すように、第3実施形態の物体検出処理において、物体判定部32は、三測量が成立しないと判定すると(S106:No)、送受信情報に基づいて、隣接する一対の送受信部14R(例えば、送受信部14Rb、14Rc)の両方が間接波を受信したか否かを判定する(S111)。物体判定部32は、送受信部14Rb、14Rcの少なくとも一方が間接波を受信していないと判定すると(S111:No)、ステップS120を実行する。 As shown in FIG. 11, in the object detection process of the third embodiment, when the object determination unit 32 determines that the three- sided survey is not established (S106: No), a pair of adjacent transmission / reception units based on the transmission / reception information. It is determined whether or not both of the 14Rs (for example, the transmission / reception units 14Rb and 14Rc) have received the indirect wave (S111). When the object determination unit 32 determines that at least one of the transmission / reception units 14Rb and 14Rc has not received the indirect wave (S111: No), the object determination unit 32 executes step S120.

物体判定部32は、送受信部14Rb、14Rcの両方が間接波を受信したと判定すると(S111:Yes)、送受信部14Rb、14Rcが受信した間接波の両方の波高が閾値波高以上か否かを判定する(S112)。物体判定部32は、間接波のいずれかの波高が閾値波高以上でないと判定すると(S112:No)、ステップS120を実行する。 When the object determination unit 32 determines that both the transmission / reception units 14Rb and 14Rc have received the indirect wave (S111: Yes), the object determination unit 32 determines whether or not the wave heights of both the indirect waves received by the transmission / reception units 14Rb and 14Rc are equal to or higher than the threshold value. Judgment (S112). When the object determination unit 32 determines that the wave height of any of the indirect waves is not equal to or higher than the threshold value (S112: No), the object determination unit 32 executes step S120.

物体判定部32は、間接波の波高が閾値波高以上であると判定すると(S112:Yes)、隣接する一対の送受信部14Rb、14Rcのいずれかが直接波を受信しているか否かを判定する(S114)。物体判定部32は、送受信部14Rb、14Rcの両方が直接波を受信していないと判定すると(S114:No)、送受信情報に基づいて送受信部14Ra、14Rdのいずれかが間接波を受信しているか否かを判定する(S315)。 When the object determination unit 32 determines that the wave height of the indirect wave is equal to or higher than the threshold wave height (S112: Yes), the object determination unit 32 determines whether or not any of the pair of adjacent transmission / reception units 14Rb and 14Rc is directly receiving the wave. (S114). When the object determination unit 32 determines that both the transmission / reception units 14Rb and 14Rc do not receive the direct wave (S114: No), either the transmission / reception unit 14Ra or 14Rd receives the indirect wave based on the transmission / reception information. Whether or not it is determined (S315).

物体判定部32は、送受信部14Ra、14Rdのいずれかが間接波を受信していると判定すると(S315:Yes)、第2信頼度を判定用総和に足すことなく、ステップS120を実行する。物体判定部32は、送受信部14Ra、14Rdの両方が間接波を受信していないと判定すると(S315:No)、判定用総和に第2信頼度を足して(S116)、ステップS120を実行する。 When the object determination unit 32 determines that any of the transmission / reception units 14Ra and 14Rd is receiving the indirect wave (S315: Yes), the object determination unit 32 executes step S120 without adding the second reliability to the determination sum. When the object determination unit 32 determines that both the transmission / reception units 14Ra and 14Rd have not received the indirect wave (S315: No), the second reliability is added to the determination sum (S116), and step S120 is executed. ..

この後、物体判定部32は、判定用総和が閾値信頼度以上か否かを判定した後(S120)、ステップS122、S124以降を実行する。 After that, the object determination unit 32 determines whether or not the determination sum is equal to or higher than the threshold reliability (S120), and then executes steps S122 and S124 and subsequent steps.

上述したように、第3実施形態の物体検出装置20では、物体判定部32は、送受信部14Ra、14Rdが間接波を受信していない場合に第2信頼度を判定用総和に足す。これにより、物体判定部32は、三測量が成立しない場合でも、送受信部14Ra、14Rdが間接波を受信しにくい領域である送受信部14Rb、14Rcの間に物体OJが存在すると判定することができる。 As described above, in the object detection device 20 of the third embodiment, the object determination unit 32 adds the second reliability to the total determination when the transmission / reception units 14Ra and 14Rd do not receive the indirect wave. As a result, the object determination unit 32 determines that the object OJ exists between the transmission / reception units 14Rb and 14Rc, which is a region where the transmission / reception units 14Ra and 14Rd are difficult to receive indirect waves, even if the three- sided survey is not established. can.

上述した各実施形態の構成の機能、接続関係、個数、配置等は、発明の範囲及び発明の範囲と均等の範囲内で適宜変更、削除等してよい。各実施形態を適宜組み合わせてもよい。各実施形態の各ステップの順序を適宜変更してよい。 The functions, connection relationships, numbers, arrangements, etc. of the configurations of the above-described embodiments may be appropriately changed or deleted within the scope of the invention and the scope of the invention. Each embodiment may be combined as appropriate. The order of each step of each embodiment may be changed as appropriate.

上述の実施形態では、閾値波高が送受信時間(または距離)とともに変化する例を挙げたが、閾値波高はこれに限定されない。例えば、閾値波高は送受信時間(または距離)に関わらず一定であってもよい。 In the above-described embodiment, the threshold wave height changes with the transmission / reception time (or distance), but the threshold value wave height is not limited to this. For example, the threshold wave height may be constant regardless of the transmission / reception time (or distance).

上述の実施形態では、車両10に設けられた物体検出装置20を例に挙げて説明したが、物体検出装置20はこれに限定されない。例えば、物体検出装置20は、駆動源を有する他の移動体、例えば、飛行機、船舶、二輪車等に設けられてもよく、移動体以外の装置に設けられてもよい。 In the above-described embodiment, the object detection device 20 provided in the vehicle 10 has been described as an example, but the object detection device 20 is not limited to this. For example, the object detection device 20 may be provided in another mobile body having a drive source, for example, an airplane, a ship, a two-wheeled vehicle, or the like, or may be provided in a device other than the mobile body.

上述の実施形態では、隣接する一対の送受信部14Rのいずれか一方が直接波を受信して、かつ、他方が間接波を受信している場合、物体判定部32は、三測量が成立すると判定する例を挙げたが、三測量が成立すると判定する状況はこれに限定されない。例えば、物体判定部32は、隣接する一対の送受信部14R(または一対の送受信部14F)の両方が直接波を受信している場合、三測量が成立すると判定してもよい。 In the above-described embodiment, when one of the pair of adjacent transmission / reception units 14R receives the direct wave and the other receives the indirect wave, the object determination unit 32 determines that the three- sided survey is established. An example of determination is given, but the situation in which it is determined that the three- sided survey is established is not limited to this. For example, the object determination unit 32 may determine that the three- sided survey is established when both the pair of adjacent transmission / reception units 14R (or the pair of transmission / reception units 14F) receive the direct wave.

上述の実施形態では、送受信部14Rb、14Rcが第1送受信部及び第2送受信部である例を挙げて説明したが、送受信部14Ra、14Rdが第1送受信部及び第2送受信部として機能してもよい。送受信部14Fa、14Fb、14Fc、14Fdが第1送受信部及び第2送受信部として機能してもよい。送受信部14Fb、14Fcが第1送受信部及び第2送受信部として機能して、送受信部14Fa、14Fdが第3送受信部及び第4送受信部として機能してもよい。 In the above-described embodiment, the transmission / reception units 14Rb and 14Rc have been described with reference to the first transmission / reception unit and the second transmission / reception unit. However, the transmission / reception units 14Ra and 14Rd function as the first transmission / reception unit and the second transmission / reception unit. May be good. The transmission / reception units 14Fa, 14Fb, 14Fc, and 14Fd may function as the first transmission / reception unit and the second transmission / reception unit. The transmission / reception units 14Fb and 14Fc may function as the first transmission / reception unit and the second transmission / reception unit, and the transmission / reception units 14Fa and 14Fd may function as the third transmission / reception unit and the fourth transmission / reception unit.

14,14F,14Fa,14Fb,14Fc,14Fd,14R,14Ra,14Rb,14Rc,14Rd:送受信部、 16:物体検出システム、 20:物体検出装置、 30:探査波判定部、 32:物体判定部、 OJ:物体、 Pk1:第1ピーク、 Pk2:第2ピーク。 14, 14F, 14Fa, 14Fb, 14Fc, 14Fd, 14R, 14Ra, 14Rb, 14Rc, 14Rd: Transmission / reception unit, 16: Object detection system, 20: Object detection device, 30: Exploration wave determination unit, 32: Object determination unit, OJ: Object, Pk1: 1st peak, Pk2: 2nd peak.

Claims (4)

物体を検出するために周辺に探査波を送受信する第1送受信部及び第2送受信部から取得した前記探査波の送受信に関する送受信情報に基づいて、前記第1送受信部及び前記第2送受信部が直接波または間接波を受信したか否かを判定して判定結果を出力する探査波判定部と、
前記判定結果に基づいて、三測量が成立すると判定した場合の第1信頼度と、前記第1送受信部及び前記第2送受信部の両方が前記間接波を受信した場合の第2信頼度とを加算する処理を1回以上実行することにより算出される判定用総和に基づいて物体の存在を判定する物体判定部と、
を備え
前記物体判定部は、前記判定結果に基づいて三辺測量が成立しないと判定され、かつ、前記第1送受信部及び前記第2送受信部の両方が前記間接波を受信した場合の前記第2信頼度が加算された前記判定用総和が閾値以上となったときに、前記第1送受信部と前記第2送受信部との間よりも幅が狭い物体が存在すると判定する
物体検出装置。
Based on the transmission / reception information related to the transmission / reception of the exploration wave acquired from the first transmission / reception unit and the second transmission / reception unit that transmit / receive the exploration wave to the periphery to detect the object, the first transmission / reception unit and the second transmission / reception unit directly perform. An exploration wave determination unit that determines whether a wave or indirect wave has been received and outputs the determination result,
Based on the determination result, the first reliability when it is determined that the three- sided survey is established, and the second reliability when both the first transmission / reception unit and the second transmission / reception unit receive the indirect wave. An object determination unit that determines the existence of an object based on the determination sum calculated by executing the process of adding the above one or more times .
Equipped with
The object determination unit determines that the three-sided survey is not established based on the determination result, and the second reliability when both the first transmission / reception unit and the second transmission / reception unit receive the indirect wave. When the sum of the determinations to which the degrees are added becomes equal to or greater than the threshold value, it is determined that an object having a width narrower than that between the first transmission / reception unit and the second transmission / reception unit exists.
Object detector.
前記物体判定部は、前記三測量が成立すると判定した場合、前記判定用総和に基づいて前記物体の存在を判定する
請求項1に記載の物体検出装置。
The object detection device according to claim 1, wherein the object determination unit determines the existence of the object based on the total determination for determination when it is determined that the three- sided survey is established.
前記物体判定部は、前記第1信頼度と、前記第1信頼度以下の前記第2信頼度とに基づいて前記判定用総和を算出する
請求項1または2に記載の物体検出装置。
The object detection device according to claim 1 or 2 , wherein the object determination unit calculates the total determination for determination based on the first reliability and the second reliability equal to or lower than the first reliability.
前記探査波判定部は、前記第1送受信部及び前記第2送受信部の外側の両側に配置され、前記探査波を送受信する第3送受信部及び第4送受信部から取得した前記探査波に関する送受信情報に基づいて、前記第3送受信部及び前記第4送受信部が前記間接波を受信したか否かを判定し、
前記物体判定部は、前記判定結果が、前記第1送受信部及び前記第2送受信部の両方が前記間接波を受信したことを示し、かつ、前記第3送受信部及び前記第4送受信部の両方が前記間接波を受信していないことを示す場合、前記第2信頼度を前記判定用総和に足す
請求項1から請求項のいずれか1項に記載の物体検出装置。
The exploration wave determination unit is arranged on both sides outside the first transmission / reception unit and the second transmission / reception unit, and transmission / reception information regarding the exploration wave acquired from the third transmission / reception unit and the fourth transmission / reception unit for transmitting and receiving the exploration wave. Based on, it is determined whether or not the third transmission / reception unit and the fourth transmission / reception unit have received the indirect wave.
The object determination unit indicates that the determination result indicates that both the first transmission / reception unit and the second transmission / reception unit have received the indirect wave, and both the third transmission / reception unit and the fourth transmission / reception unit. The object detection device according to any one of claims 1 to 3 , wherein the second reliability is added to the total for determination when indicates that the indirect wave is not received.
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JP2015200563A (en) 2014-04-08 2015-11-12 パナソニックIpマネジメント株式会社 Object detection apparatus
JP2016080642A (en) 2014-10-22 2016-05-16 株式会社デンソー Object detector
JP2016080647A (en) 2014-10-22 2016-05-16 株式会社デンソー Object detector
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