Method and system for suppressing false alarm caused by false targets

Abstract

The present invention proposes a method for suppressing false alarms caused by false targets, including: when the speed of a target vehicle relative to a vehicle body is within the speed range of the vehicle body, there is no other target vehicle in front of the target vehicle, the mass of the target vehicle is greater than or equal to a mass setting value, the absolute speed of the target vehicle is less than a speed setting value, and the distance of the target vehicle relative to the vehicle body is greater than or equal to a distance setting value, a first alarm suppression time is set. A system for suppressing false alarms caused by false targets is also provided. By adding some judgment conditions for whether a target vehicle is a false target, false targets can be identified with a higher probability and the accuracy of judging false targets is also improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a method and a suppression system for suppressing false alarms caused by false targets. Background Art

[0002] At present, the method for suppressing false alarms caused by false targets includes: a millimeter wave radar is installed on the vehicle, which transmits and receives reflected electromagnetic waves, and the speed and mass of the target vehicle are calculated by a control unit. According to the working principle of the millimeter wave radar, since the fuzzy distance will produce false targets, when the relative speed of the target vehicle to the vehicle body is usually equal to or close to the speed of the vehicle body, the target vehicle is judged to be a false target, so the possible false targets can be identified according to the relative speed of the target vehicle to the vehicle body. In order to improve the reliability of identifying false targets, on the basis of the above determination of the speed of the target vehicle, whether it is a false target is further confirmed according to the mass of the target vehicle. When the mass of the target vehicle is lower than the set value, the target vehicle is judged to be a false target. For the false target determined by the speed and mass of the target vehicle, when the false target appears in the adjacent lane of the main vehicle and meets the alarm conditions of the speed change assist function, the alarm system sets the corresponding alarm suppression time to suppress the false target from causing the wrong lane change assist function alarm.

[0003] However, identifying possible false targets based solely on the speed of the target vehicle relative to the vehicle body and the mass of the target vehicle cannot completely determine the false targets. For example, the speed of the target vehicle relative to the vehicle body is equal to or close to the speed of the vehicle body, and the mass of the target vehicle is the same as or close to the mass of the vehicle body. For such false targets, the above method cannot determine that the target vehicle is a possible false target. When the false target appears in the left or right adjacent lanes of the vehicle body and meets the alarm conditions of the lane change assist function, an erroneous alarm will be generated. Summary of the invention

[0004] The present application provides a method and a suppression system for suppressing false alarms caused by false targets, so as to solve the problem of how to judge that a target vehicle is a possible false target when the speed of the target vehicle relative to the vehicle body is equal to or close to the speed of the vehicle body and the mass of the target vehicle is the same as or close to the mass of the vehicle body.

[0005] On the one hand, an embodiment of the present application provides a method for suppressing false alarms caused by false targets, comprising:

[0006] The speed of the target vehicle relative to the vehicle body is within the speed range of the vehicle body.

[0007] When there is no other target vehicle in front of the target vehicle, the mass of the target vehicle is greater than or equal to the mass setting value, the absolute speed of the target vehicle is less than the speed setting value, and the distance of the target vehicle relative to the vehicle body is greater than or equal to the distance setting value, the first alarm suppression time is set.

[0008] Furthermore, when the speed of the target vehicle relative to the vehicle body is within the speed range of the vehicle body, and there are other target vehicles between the target vehicle and the vehicle body, and the other target vehicles are located in the same lane as the target vehicle, a second alarm suppression time is set.

[0009] Furthermore, when the speed of the target vehicle relative to the vehicle body is within the speed range of the vehicle body, when there is no other target vehicle in front of the target vehicle, and the mass of the target vehicle is less than the mass setting value, a third alarm suppression time is set.

[0010] Furthermore, when the speed of the target vehicle relative to the vehicle body is within the speed range of the vehicle body, when there is no other target vehicle in front of the target vehicle, the mass of the target vehicle is greater than or equal to the mass setting value, and the absolute speed of the target vehicle is greater than or equal to the speed setting value, the fourth alarm suppression time is set.

[0011] Furthermore, the mass of the target vehicle is a signal-to-noise ratio value of the target vehicle.

[0012] On the other hand, an embodiment of the present invention provides a system for suppressing false alarms caused by false targets, comprising:

[0013] A radar transceiver unit, outputting an intermediate frequency signal;

[0014] A processor unit processes the intermediate frequency signal and calculates the speed of the target vehicle, the distance from the vehicle body, and the mass of the target vehicle, and sets the alarm suppression time according to the calculation results;

[0015] The communication control unit sends alarm status information to the outside.

[0016] In the system for suppressing false alarms caused by false targets, the mass of the target vehicle is the signal-to-noise ratio value of the target vehicle. The power P of the received electromagnetic wave is calculated according to the amplitude of the intermediate frequency signal, the power value Pn generated by the noise is set, and the signal-to-noise ratio value SNR of the target vehicle is calculated, SNR=P / Pn.

[0017] Finally, the present invention also provides a vehicle, comprising a system for suppressing false alarms caused by false targets.

[0018] The technical solution of the present invention includes at least the following advantages: the method for suppressing false alarms caused by false targets provided by the embodiment of the present invention not only makes judgments based on the speed of the target vehicle relative to the vehicle body and the mass of the target vehicle, but also adds judgments based on the absolute speed of the target vehicle and the distance of the target vehicle relative to the vehicle body. When the speed of the target vehicle relative to the vehicle body is equal to or close to the speed of the vehicle body, even if the mass of the target vehicle is close to or equal to the mass of the real target, if the absolute speed of the target vehicle is very high and out of touch with the actual situation, a higher alarm suppression time will be set. If the distance of the target vehicle relative to the vehicle body is very far, a higher alarm suppression time will also be set. In addition, if the speed of the target vehicle relative to the vehicle body is equal to or close to its own speed, but there are other target vehicles in front of the target vehicle, then the alarm of the lane change assistance function caused by the target vehicle can still be suppressed. Adding the above judgment conditions cannot completely and accurately determine that the target vehicle is a false target, but if there are other target vehicles in front of the false target and between the vehicle body, then the false target will not pose a danger to the lane change of the vehicle body, so a very high alarm suppression time can be set, and even the alarm of the lane change assistance function caused by the false target can be completely suppressed. If the absolute speed of the false target is much higher than the speed limit value (the speed allowed by traffic regulations), it means that the possibility of the false target is higher, and a higher alarm suppression time can be set for the false target. If the distance between the false target and the vehicle body is very far, even if the collision time between the false target and the vehicle body meets the alarm condition of the lane change assistance function, the system can still set a higher alarm suppression time to increase the accuracy of false target judgment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A schematic diagram showing the road condition when the target vehicle is a real target;

[0021] Figure 2 A schematic flow chart of the steps of a method for suppressing false alarms caused by false targets provided by an embodiment of the present invention;

[0022] Figure 3 A schematic diagram of the structure of a radar transceiver unit provided in an embodiment of the present invention;

[0023] Figure 4A frequency diagram of a frequency modulated continuous wave provided by an embodiment of the present invention;

[0024] Figure 5 A schematic diagram for comparing waveform diagrams of a transmitted frequency modulated continuous wave, a received frequency modulated continuous wave, and an intermediate frequency signal continuous wave generated by a mixer provided in an embodiment of the present invention;

[0025] Figure 6 A schematic diagram of a structure in which electromagnetic waves on a target vehicle are reflected onto two receiving antennas provided in an embodiment of the present invention;

[0026] Figure 7 A schematic diagram of road condition display provided in Embodiment 1 of the present invention. DETAILED DESCRIPTION

[0027] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in this application. Obviously, the described embodiments are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0028] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0029] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can also be the internal connection of two components, it can be a wireless connection, or it can be a wired connection. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] In the following description, the suffixes such as "module", "component" or "unit" used to represent elements are only used to facilitate the description of the present invention, and have no specific meanings. Therefore, "module" and "component" can be used interchangeably.

[0031] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0032] Figure 1 This is a schematic diagram showing the road conditions when the target vehicle is a real target. Figure 1 , a radar receiver unit is installed on the vehicle body 11. After detecting the target vehicle 12, the target vehicle 12 is a real target at this time. The lateral distance L1 of the target vehicle 12 from the vehicle body 11, the longitudinal distance L2 of the target vehicle 12 from the vehicle body 11, and the speed V of the target vehicle 12 relative to the vehicle body 11 are calculated. The processor unit calculates the collision time T=L2 / V. When the target vehicle 12 is in the left and right adjacent lanes of the vehicle body 11 and T is less than the alarm threshold, the processor unit sends an alarm signal of the driving assistance function to the alarm light driving unit, and the alarm light driving unit drives the alarm light device to issue a light warning to the driver. In an embodiment of the present invention, the alarm signal can also be sent to other control modules of the vehicle body 11 through the communication control unit, and finally the alarm light is lit.

[0033] Since the vehicle body is in a complex environment, the electromagnetic waves emitted by the radar receiver unit have multiple reflection paths, which will form false targets. After the electromagnetic waves are finally received by the receiving antenna of the radar receiver unit, the false target has distance ambiguity due to multi-path reflection of the electromagnetic waves. The speed of the false target calculated in the processor unit is equal to or close to the speed of the vehicle body relative to the speed of the vehicle body. When the false target meets the alarm conditions of the lane change assist function, the processor unit sends an alarm signal to the alarm light drive unit or the communication control unit, which eventually causes the alarm light to be mistakenly lit, forming a false alarm.

[0034] Therefore, a method for suppressing false alarms caused by false targets is proposed. The method calculates the corresponding alarm suppression time according to the processor unit. Even if the false target meets the alarm condition of the lane change assist function, the processor unit delays sending the alarm signal. Finally, the alarm light driving unit or the communication control unit does not send a signal to the alarm light device to light up the alarm light before the alarm suppression time ends.

[0035] Figure 2 A schematic flow chart of the steps of a method for suppressing false alarms caused by false targets provided by an embodiment of the present invention. Figure 2 ,The methods to suppress false targets and cause false alarms include:

[0036] The speed of the target vehicle relative to the vehicle body is within the speed range of the vehicle body.

[0037] When there is no other target vehicle directly in front of the target vehicle, the mass of the target vehicle is greater than or equal to the mass setting value, the absolute speed of the target vehicle is less than the speed setting value, and the distance of the target vehicle relative to the vehicle body is greater than or equal to the distance setting value, the first alarm suppression time is set.

[0038] In an embodiment of the present invention, the speed range refers to the speed of the vehicle body plus or minus a smaller speed fluctuation amplitude value. For example, the vehicle body travels at 75km / h and the speed fluctuation amplitude value is 5km / h, then the speed range of the vehicle body is [70km / h, 80km / h]. The quality setting value is the signal-to-noise ratio of the target vehicle. The higher the signal-to-noise ratio value, the higher the quality of the target vehicle. The speed setting value usually refers to the high-speed speed limit of 120km / h, and can also be set to 140km / h. For very distant target vehicles, it is safer to collide with the vehicle body, and the distance setting value can be set to 60 meters.

[0039] When the speed of the target vehicle relative to the vehicle body is within the speed range of the vehicle body, and there are other target vehicles between the target vehicle and the vehicle body, and the other target vehicles are located in the same lane as the target vehicle, a second alarm suppression time is set.

[0040] When the speed of the target vehicle relative to the vehicle body is within the speed range of the vehicle body, when there is no other target vehicle in front of the target vehicle, and the mass of the target vehicle is less than the mass setting value, the third alarm suppression time is set.

[0041] When the speed of the target vehicle relative to the vehicle body is within the speed range of the vehicle body, when there is no other target vehicle in front of the target vehicle, the mass of the target vehicle is greater than or equal to the mass setting value, and the absolute speed of the target vehicle is greater than or equal to the speed setting value, the fourth alarm suppression time is set.

[0042] When the speed of the target vehicle relative to the vehicle body is not within the speed range of the vehicle body, the alarm suppression time is not set; when the speed of the target vehicle relative to the vehicle body is within the speed range of the vehicle body, when there is no other target vehicle directly in front of the target vehicle, the mass of the target vehicle is greater than or equal to the mass setting value, the absolute speed of the target vehicle is less than the speed setting value, and the distance of the target vehicle relative to the vehicle body is less than the distance setting value, the alarm suppression time is not set.

[0043] When the target vehicle meets the alarm condition of the lane change assist function of the vehicle body, the above-mentioned alarm suppression time is used. If the alarm suppression time is not set, the output value is zero.

[0044] In addition to judging based on the speed of the target vehicle relative to the vehicle body and the mass of the target vehicle, the method for suppressing false alarms caused by false targets provided by the embodiment of the present invention also adds judging based on the absolute speed of the target vehicle and the distance of the target vehicle relative to the vehicle body. When the speed of the target vehicle relative to the vehicle body is equal to or close to the speed of the vehicle body, even if the mass of the target vehicle is close to or equal to the mass of the real target, if the absolute speed of the target vehicle is very high and out of touch with the actual situation, a higher alarm suppression time will be set. If the distance of the target vehicle relative to the vehicle body is very far, a higher alarm suppression time will also be set. In addition, if the speed of the target vehicle relative to the vehicle body is equal to or close to its own speed, but there are other target vehicles in front of the target vehicle, then the alarm of the lane change assistance function caused by the target vehicle can still be suppressed. Adding the above judgment conditions cannot completely and accurately determine that the target vehicle is a false target, but if there are other target vehicles in front of the false target and between the vehicle body, then the false target will not pose a danger to the lane change of the vehicle body, so a very high alarm suppression time can be set, and even the alarm of the lane change assistance function caused by the false target can be completely suppressed. If the absolute speed of the false target is much higher than the speed limit value (the speed allowed by traffic regulations), it means that the possibility of the false target is higher, and a higher alarm suppression time can be set for the false target. If the distance between the false target and the vehicle body is very far, even if the collision time between the false target and the vehicle body meets the alarm condition of the lane change assistance function, the system can still set a higher alarm suppression time to increase the accuracy of false target judgment.

[0045] The method for suppressing false alarms caused by false targets provided by the embodiment of the present invention can identify false targets with a higher probability by adding some judgment conditions that target vehicles are false targets, and also improves the accuracy of judging false targets.

[0046] The present invention provides a system for suppressing false alarms caused by false targets, comprising a radar transceiver unit, which outputs an intermediate frequency signal; a processor unit, which processes the intermediate frequency signal and calculates the speed of a target vehicle, the distance from the vehicle body and the mass of the target vehicle, and sets an alarm suppression time according to the calculation results; and a communication control unit, which sends alarm status information to the outside.

[0047] Figure 3 This is a schematic diagram of the structure of a radar transceiver unit provided by an embodiment of the present invention. Figure 3The radar transceiver unit includes a transmitting antenna 31, a receiving antenna 32, a mixer 33 and a synthesizer unit 34. The synthesizer unit 34 generates a frequency modulated continuous wave, which is sent by the transmitting antenna 31 to the surrounding environment. The receiving antenna 32 receives the electromagnetic wave reflected by the target vehicle. The mixer 33 combines the transmitted electromagnetic wave and the received electromagnetic wave to generate an intermediate frequency signal. The radar transceiver unit is controlled by the processor unit to control the parameters of the electromagnetic wave it transmits and inputs the intermediate frequency signal output by the mixer to the processor unit.

[0048] First, the radar transceiver unit sends a frequency modulated continuous wave (FMCS) to the front of the radar through the transmitting antenna. The frequency of the FMCS is proportional to time. Figure 4 A frequency diagram of a frequency modulated continuous wave provided by an embodiment of the present invention. Figure 4 , fc is the starting frequency of the FM continuous wave, S is the slope of the frequency rise, B is the frequency value of the FM continuous wave starting from fc, that is, the bandwidth, and T is the duration of the FM continuous wave.

[0049] The intermediate frequency signal can be expressed by the expression A×sin(2×π×f×t+φ), where A is the amplitude of the intermediate frequency signal, f is the frequency of the intermediate frequency signal, and φ is the initial phase of the intermediate frequency signal;

[0050] In the processor unit, the distance between the target vehicle and the vehicle body is calculated, wherein the point-to-point distance between the target vehicle and the vehicle body is calculated as Wherein, c is the speed of light, R is the point-to-point distance from the target vehicle to the vehicle body, f is the frequency of the intermediate frequency signal, and S is the slope of the frequency rise.

[0051] Secondly, the target vehicle speed is calculated as follows, Figure 5 A schematic diagram for comparing waveforms of the transmitted frequency modulated continuous wave, the received frequency modulated continuous wave, and the intermediate frequency signal continuous wave generated by the mixer provided in an embodiment of the present invention. Figure 5 , the time from A to D, B to E, and C to F are all Δτ, τ is the time delay of the received FM continuous wave relative to the transmitted FM continuous wave, and the phase difference between A to D (that is, the phase difference between C to F) is For two adjacent intermediate frequency signals from the same object, the phase difference is ω, Among them, v is the speed of the target object, T is the time interval between two adjacent intermediate frequency signals, and also the duration of a single frequency modulated continuous wave. The final calculated speed of the target vehicle is:

[0052] Finally, the angle of the target vehicle needs to be calculated based on the electromagnetic waves received by two or more receiving antennas. Figure 6A schematic diagram of a structure in which electromagnetic waves on a target vehicle are reflected onto two receiving antennas according to an embodiment of the present invention. Figure 6 , the distance between the left antenna 61 and the target vehicle 62 is d, the distance between the right antenna 63 and the target vehicle 62 is d+Δd, the angle of the target vehicle relative to the vehicle body is θ, and the distance between the two antennas is Y, satisfying the expression: The angle of the target object relative to the vehicle body is calculated as Based on the angle θ of the target object relative to the vehicle body and the point-to-point distance R from the target vehicle to the vehicle body, it can be known that the lateral distance D1 = Rcosθ of the target vehicle from the vehicle body and the longitudinal distance D2 = Rsinθ of the target vehicle from the vehicle body.

[0053] In the processor unit, the power value P of the electromagnetic wave received by the receiving antenna can be calculated according to the amplitude of the intermediate frequency signal, and a power value Pn generated by noise such as ground clutter is set at the same time. The signal-to-noise ratio SNR can be calculated according to P and Pn, SNR = P / Pn. The signal-to-noise ratio represents the quality of the target vehicle. The higher the signal-to-noise ratio, the higher the quality of the target vehicle.

[0054] The present invention also provides a computer device, wherein the processor unit runs a computer program, thereby causing the computer device to execute the functions of the various modules of the method for suppressing false alarms caused by false targets or the system for suppressing false alarms caused by false targets.

[0055] According to the method and system for suppressing false alarms caused by false targets provided by the present invention, the following embodiments illustrate possible false target situations.

[0056] Embodiment 1

[0057] Figure 7 This is a schematic diagram of road condition display provided by Embodiment 1 of the present invention. Figure 7 , the vehicle body 71 is traveling at 80km / h, and the radar transceiver unit detects a target vehicle B in the right adjacent lane of the vehicle body 71. The speed of the target vehicle B relative to the vehicle body is 82km / h, that is, the absolute speed of the target vehicle B is 162km / h. In the first embodiment of the present invention, the speed fluctuation amplitude of the vehicle body is 5km / h, the speed interval of the vehicle body is [75km / h, 85km / h], and the speed of the target vehicle B relative to the vehicle body is 82km / h, which is within the speed interval of the vehicle body [75km / h, 85km / h].

[0058] Then there is a target vehicle A between the target vehicle B and the vehicle body, and the target vehicle A is located in the same lane as the target vehicle B. The target vehicle B is very likely to be a false target, and the alarm suppression time is set to 10 seconds. If the target vehicle B meets the alarm condition of the lane change assist function, then according to the method for suppressing false alarms caused by false targets provided by the present invention, the alarm will be delayed by 10 seconds.

[0059] Embodiment 2

[0060] The vehicle body is traveling at 80 km / h, and the radar transceiver unit detects a target vehicle B in the right adjacent lane of the vehicle body. The speed of the target vehicle B relative to the vehicle body is 82 km / h, that is, the absolute speed of the target vehicle B is 162 km / h. In the second embodiment of the present invention, the speed fluctuation amplitude of the vehicle body is 5 km / h, the speed interval of the vehicle body is [75 km / h, 85 km / h], and the speed of the target vehicle B relative to the vehicle body is 82 km / h, which is within the speed interval of the vehicle body [75 km / h, 85 km / h].

[0061] Subsequently, there is no other target vehicle in front of the target vehicle B in the same lane. The radar transceiver unit calculates that the signal-to-noise ratio of the target vehicle B is 15dB, which is lower than the quality setting value of 20dB. The target vehicle B is very likely to be a false target. The alarm suppression time is set to 1 second. If the target vehicle B meets the alarm conditions of the lane change assist function, then according to the method for suppressing false alarms caused by false targets provided by the present invention, the alarm will be delayed by 1 second.

[0062] Embodiment 3

[0063] The vehicle body is traveling at 80 km / h, and the radar transceiver unit detects a target vehicle B in the right adjacent lane of the vehicle body. The speed of the target vehicle B relative to the vehicle body is 82 km / h, that is, the absolute speed of the target vehicle B is 162 km / h. In the second embodiment of the present invention, the speed fluctuation amplitude of the vehicle body is 5 km / h, the speed interval of the vehicle body is [75 km / h, 85 km / h], and the speed of the target vehicle B relative to the vehicle body is 82 km / h, which is within the speed interval of the vehicle body [75 km / h, 85 km / h].

[0064] Subsequently, there is no other target vehicle in front of the target vehicle B in the same lane. The signal-to-noise ratio of the target vehicle B is calculated by the radar transceiver unit to be 25dB, which is 20dB higher than the quality setting value. Since the absolute speed of the target vehicle B is 162km / h, which is greater than the speed setting value of 140km / h, there is a high possibility that the target vehicle B is a false target. The alarm suppression time is set to 2 seconds. If the target vehicle B meets the alarm conditions of the lane change assist function, then according to the method for suppressing false alarms caused by false targets provided by the present invention, the alarm will be delayed by 2 seconds.

[0065] Embodiment 4

[0066] The vehicle is traveling at 55 km / h, and the radar transceiver unit detects a target vehicle B in the right adjacent lane of the vehicle. The speed of the target vehicle B relative to the vehicle is 52 km / h, that is, the absolute speed of the target vehicle B is 107 km / h. In the second embodiment of the present invention, the speed fluctuation amplitude of the vehicle is 5 km / h, the speed interval of the vehicle is [50 km / h, 60 km / h], and the speed of the target vehicle B relative to the vehicle is 52 km / h, which is within the speed interval of the vehicle [50 km / h, 60 km / h].

[0067] Subsequently, there is no other target vehicle in front of the target vehicle B in the same lane. The signal-to-noise ratio of the target vehicle B is calculated by the radar transceiver unit to be 25dB, which is 20dB higher than the quality setting value. Since the absolute speed of the target vehicle B is 107km / h, which is less than the speed setting value of 140km / h, and the distance of the target vehicle B relative to the vehicle body is 70 meters, which is greater than the distance setting value of 60 meters, there is a high possibility that the target vehicle B is a false target. The alarm suppression time is set to 2 seconds. If the target vehicle B meets the alarm conditions of the lane change assist function, then according to the method for suppressing false alarms caused by false targets provided by the present invention, the alarm will be delayed by 2 seconds.

[0068] An embodiment of the present invention further provides a vehicle, comprising the above-mentioned system for suppressing false alarms caused by false targets.

[0069] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection created by this application.

Claims

1. A method for suppressing false alarms caused by false targets, characterized in that: include: The speed of the target vehicle relative to the vehicle body is within the speed range of the vehicle body. When there is no other target vehicle in front of the target vehicle, the mass of the target vehicle is greater than or equal to the mass setting value, the absolute speed of the target vehicle is less than the speed setting value, and the distance of the target vehicle relative to the vehicle body is greater than or equal to the distance setting value, the first alarm suppression time is set; The mass of the target vehicle is a signal-to-noise ratio value of the target vehicle.

2. The method for suppressing false alarms caused by false targets according to claim 1, characterized in that: When the speed of the target vehicle relative to the vehicle body is within the speed range of the vehicle body, and there are other target vehicles between the target vehicle and the vehicle body, and the other target vehicles are located in the same lane as the target vehicle, a second alarm suppression time is set.

3. The method for suppressing false alarms caused by false targets according to claim 1, characterized in that: When the speed of the target vehicle relative to the vehicle body is within the speed range of the vehicle body, when there is no other target vehicle in front of the target vehicle, and the mass of the target vehicle is less than the mass setting value, the third alarm suppression time is set.

4. The method for suppressing false alarms caused by false targets according to claim 1, characterized in that: When the speed of the target vehicle relative to the vehicle body is within the speed range of the vehicle body, when there is no other target vehicle in front of the target vehicle, the mass of the target vehicle is greater than or equal to the mass setting value, and the absolute speed of the target vehicle is greater than or equal to the speed setting value, the fourth alarm suppression time is set.

5. A system for suppressing false alarms caused by false targets, used to implement the method for suppressing false alarms caused by false targets as claimed in any one of claims 1 to 4, characterized in that: The system comprises: A radar transceiver unit, outputting an intermediate frequency signal; A processor unit processes the intermediate frequency signal and calculates the speed of the target vehicle, the distance from the vehicle body, and the mass of the target vehicle, and sets the alarm suppression time according to the calculation results; A communication control unit sends alarm status information to the outside; The mass of the target vehicle is a signal-to-noise ratio value of the target vehicle.

6. The system for suppressing false alarms caused by false targets according to claim 5, characterized in that: The power P of the received electromagnetic wave is calculated according to the amplitude of the intermediate frequency signal, the power value Pn generated by the noise is set, and the signal-to-noise ratio SNR of the target vehicle is calculated, SNR=P / Pn.

7. A vehicle comprising the system for suppressing false alarms caused by false targets as claimed in any one of claims 5 or 6.

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