TWI784618B - Radar detection system with low power consumption - Google Patents

Abstract

A radar detection system with low power consumption, which is suitable for detecting a measurement, such as people, vehicle, etc, and includes an arithmetic controller having a time-sharing control unit, a driving unit and a computing unit, the time-sharing control unit is provided for inputting a time axis and distinguishing it into a continuous first time period, a second time period and a third time period, the driving unit drives the computing unit to operate during the second time period, and a radar detection system connected to the arithmetic controller, detects a detection object through the radar and generates a radar signal that is transmitted to the computing unit, the computing unit divides the radar signal into a background scene signal and a measurement signal, finally the drive unit drives the computing unit to calculate the measurement signal at the second time period and sleeps at the third time period to reduce power consumption.

Description

Low Power Radar Detection System

The invention relates to a radar detection system, in particular to a low power consumption radar detection system.

Take the technology of automatically detecting whether a car is parked in a parking space as an example. At present, image detection systems are commonly used in the market to judge whether a car is parked in a parking space, and then calculate the parking time of the car and charge for it. The same technology can also be used to detect the movement of people, the number of animals passing in a certain area, the number of cars passing in a certain road section, etc. However, the above-mentioned detection is mainly to capture the current situation in the form of an image, and then transmit the image to the cloud server for analysis and calculation, analyze the target objects such as people, cars, animals, etc. from the image, and finally obtain the target object. status and duration.

However, although the above-mentioned image analysis technology can obtain the status and residence time of the target measurement object, since the data structure of the image is composed of a two-dimensional pixel array, the amount of data is extremely large, and it requires not only a high-performance server or processor to process, but also The time is lengthy. Image analysis technology usually needs to analyze multiple images in a very short period of time. In order not to cause delays in the detection system, the server or processor must be turned on for a long time with high-performance continuous computing, resulting in a large amount of power consumption. In view of this, it is indeed necessary to provide a technical means to solve the aforementioned problems.

The first object of the present invention is to solve the problem that the computing processing system must perform image processing with high performance for a long time due to the image analysis technology.

The second object of the present invention is to solve the problem of large power consumption caused by the long-time high-efficiency operation of the computing processing system.

In order to solve the aforementioned problems, the present invention is a low-power radar detection system, which is suitable for a detection object, such as a person, a vehicle, and the like. And the radar detection system with low power consumption includes: an operation controller, a time-sharing control unit, a drive unit and a calculation unit with mutual information connection, the time-sharing control unit is for inputting a time axis, and The time axis is divided into a continuous first time period, a second time period and a third time period, and the driving unit drives the calculation unit to operate during the second time period; a radar detection device, and The computing controller is connected to information, and the radar detection device detects the detected object through radar and generates a radar signal, and the radar signal is transmitted to the computing unit of the computing controller, and the computing unit divides the radar signal into A background scene signal and a measured object signal. Finally, the drive unit drives the calculation unit to calculate the measured object signal in the second time period, and reduces the power consumption of the calculation unit in the third time period through the drive unit.

In a preferred embodiment, the calculation unit of the calculation controller has a timing block. When the calculation unit receives the measured object signal, the timing block starts timing, and when the calculation unit does not receive Stop timing after the measured object signal, and finally, the timing block subtracts the stop timing from the start timing to obtain the dwell time of the detection object.

In a preferred embodiment, after the computing unit receives the radar signal, the continuous signal is judged as the background scene signal, while the non-persistent signal is judged as the measured object signal.

In a preferred embodiment, the radar signal emitted by the radar detection device has different strengths depending on the material and is sent back to the calculation controller, and the calculation unit ignores signals with lower than a predetermined strength.

In this way, the central processing unit only drives the radar detection device for detection in the first time period, and performs calculations in the second time period, and is in a standby dormant state in the third time period, so that the operation controller and radar detection The detection device is in a standby state to achieve the effect of saving power. Moreover, since the radar detection device is used for detection, the amount of signal data generated by it is small, and the processing of the calculation unit is easier. Compared with the conventional Judging by images not only saves power because of the small amount of calculation, but also effectively improves the calculation speed because of the simple calculation.

10: Operation controller

11: Time-sharing control unit

12: Drive unit

13: Calculation unit

20: Radar detection device

30: Timeline

31: The first time period

32: Second time period

33: The third time period

Fig. 1 is a structural schematic diagram of the present invention in a preferred embodiment; Fig. 2 is a schematic diagram of the present invention divided into three time periods on a time axis; Fig. 3 is a schematic diagram of implementation steps of the present invention.

Please refer to FIG. 1 to FIG. 2 , the present invention is a low-power radar detection system, which is applicable to a detection object, such as a person, a vehicle, and the like. And the radar detection system of this low power consumption has an operation controller 10 and a radar detection device 20, wherein: the operation controller 10 has a time-sharing control unit 11, a drive unit 12 and a calculation unit connected with each other. Unit 13, this time-sharing control unit 11 is provided for inputting a time axis 30, and this time axis 30 is divided into a continuous first time segment 31, a second time segment 32 and a third time segment 33, and the The drive unit 12 drives the calculation unit 13 to operate during the second time period 32; in this embodiment, the calculation controller 10 is a calculation controller, a main device of a computer, a central processing unit (English: Central Processing Unit, abbreviated as: CPU) is an arithmetic controller whose main function is to interpret computer instructions and process data in computer software.

The radar detection device 20 is informationally connected with the calculation controller 10, and the radar detection device 20 detects the detected object through radar and generates a radar signal, and the radar signal is transmitted to the calculation unit of the calculation controller 10 13. The calculation unit 13 divides the radar signal into a background scene signal and a measurement object signal, and finally the drive unit 12 drives the calculation unit 13 to calculate the measurement object signal in the second time period 32, and through the drive unit 12 Reduce the power consumption of the computing unit 13 during the third time period 33 . By dividing the time axis 30 into a first time period 31, a second time period 32 and a third time period 33, only radar detection is performed in the first time period 31, and the third time period 33 presents a standby dormant state, In this way, all computing operations that consume more power are concentrated in the second time period 32, so as to greatly reduce power consumption and achieve the purpose of saving power.

In this embodiment, the calculation unit 13 of the calculation controller 10 has a timing block. When the calculation unit 13 receives the measured object signal, the timing block starts timing, and the calculation unit 13 The timing is stopped when the signal of the measuring object is not received, and finally, the timing block subtracts the time of stopping the timing and the time of starting the timing from each other to obtain the dwell time of the detection object. In this way, the arithmetic controller 10 can determine the time when the measured object stops at the designated position, so that the present invention can be applied to parking detection management or person residence time management.

Secondly, after the computing unit 13 receives the radar signal, the continuous signal is judged as the background scene signal, while the non-persistent signal is judged as the measured object signal. Since the radar detection device 20 can continuously detect a specific signal at the beginning of the first detection, and after the specific signal is judged to be a background scene signal, the arithmetic controller 10 can delete the background scene signal, thereby let the operation control The calculation load of the controller 10 is reduced, which not only improves the calculation performance of the calculation controller 10, but also reduces the power consumption of the calculation controller 10 during calculation.

Furthermore, depending on the material of the radar signal emitted by the radar detection device 20 , the strength of the signal sent back to the calculation controller 10 is different, and the calculation unit 13 ignores the signal lower than a predetermined strength. When the present invention is applied to parking detection management, since the car body is made of metal, the signal reflected by the car from the radar detection device 20 is stronger. If the position is measured, the radar signal of the reflected radar detection device 20 is relatively weak, and the signal lower than the predetermined strength is ignored through the calculation unit 13, thereby reducing the calculation burden of the calculation controller 10, thereby improving the calculation of the calculation controller 10. efficacy.

The above is the structural configuration and connection relationship thereof in a preferred embodiment of the present invention, the use mode of the present invention and the effect it can produce are as follows: please refer to Fig. 3, carry out an initial setting earlier in the initial stage of setting, In the initial setting stage, the radar detection device 20 can be set in the area to be detected first, and the non-detection targets and objects in the area to be detected can be excluded, so that the radar detection device 20 can first detect the area to be detected. For the first detection, since the radar detection device 20 can only measure the background scene at this time, the computing unit 13 of the computing controller 10 judges that the signal detected for the first time is the background scene signal, and then in the computing controller 10 Input the detection area and installation method (such as inclination angle and azimuth angle) of the radar detection device 20 to complete the initial setting of the radar detection device.

Secondly, after starting the radar detection device 20, the radar detection device 20 detects the detection area, and sends the data back to the operation controller 10, and performs spectrum analysis through the operation controller 10 to eliminate background scene signals, and the radar The detection device 20 enters the first time period 31 and sends a signal after detecting the detection area It is transmitted to the operation controller 10, and enters the second time period 32, and the operation controller 10 judges whether there is a moving measuring object, and enters the third time period 33 if there is no moving measuring object.

In the second time period 32, if a moving measuring object is detected, the coordinate position of the moving measuring object is calculated, and it is judged whether the moving measuring object is within the detection area; if not, the third time period 33 is entered. .

In the second time period 32, if the moving measuring object is located in the detection area, the arithmetic controller 10 will judge the material of the measuring object. The frequency spectrum judges whether it is a vehicle and calculates the characteristics of the measured object. After the vehicle is detected, it enters the third time period 33, and then repeats the loop of the first time period 31, the second time period 32, and the third time period 33.

In this way, since the amount of spectrum data generated by the radar detection device 20 is relatively small, the calculation controller 10 can perform fast calculations during processing. Therefore, the calculation controller 10 can only drive the radar detection device 20 during the first time period 31 The detection is performed, and calculation is performed in the second time period 32, and the third time period 33 is in a standby dormant state. At this time, the information generated by the radar detection module has been calculated, so the calculation controller 10 and the radar detection device 20 can be set to standby sleep state to achieve power saving effect. Furthermore, since the radar detection device 20 is used for detection, the amount of signal data generated by it is relatively small, which makes the processing of the calculation unit 13 easier. Compared with the conventional judgment based on images, it is not only more efficient because of the small amount of calculation In order to save power, the calculation speed is effectively improved because of the simplicity of the calculation.

10: Operation controller

11: Time-sharing control unit

12: Drive unit

13: Calculation unit

20: Radar detection device

Claims (8)

A radar detection system with low power consumption includes the following sub-systems: an operation controller, a time-sharing control unit, a drive unit and a calculation unit with mutual information connection, and the time-sharing control unit is used to input a time axis , and the time axis is divided into a continuous first time period, a second time period and a third time period, and the drive unit drives the calculation unit to operate during the second time period; a radar detection device , connected with the operation controller, and the radar detection device sends radar waves and receives radar echoes from a detection object, generates a radar signal after comparison processing, and transmits the radar signal to the operation controller The calculation unit, the calculation unit divides the radar signal into a signal of the background scene and a signal of the measured object, and finally the driving unit drives the calculation unit to calculate the state of the signal of the measured object in the second time period, and through the The driving unit drives the computing unit to sleep during the third period of time. The low-power radar detection system as described in claim 1, wherein, the calculation unit of the operation controller has a timing block, and when the calculation unit receives the measured object signal, the timing block Start timing, and stop timing after the signal of the measured object disappears, and finally, the timing block subtracts the time of stopping timing and the time of starting timing from each other to obtain the dwell time of the detection object. The low-power radar detection system as described in claim 1, wherein, after the computing unit receives the radar signal, the continuous signal is judged as the signal of the background scene, and the non-continuous signal is judged as the measured object signal and enter the third time period. The low-power radar detection system as described in Claim 1, wherein, depending on the material of the measured object, the strength of the signal returned to the calculation controller is different, and the calculation unit ignores the signal lower than a predetermined strength. The low-power radar detection system as claimed in claim 1, wherein, during the third time period, the calculation unit and the radar detection device are in a standby state. The low-power radar detection system as described in claim 1, wherein, if the signal of the measured object is not detected during the second time period, it enters into the third time period standby and dormancy. The low-power radar detection system as described in claim 1, wherein, during the second time period, if the measured object signal does not have the characteristics of the target, it enters the third time period and enters the standby dormancy, and the target The feature is judged and calculated by analyzing the frequency spectrum reflected by the measured object. The low-power radar detection system as described in Claim 1, wherein an initial setting is performed at the initial stage of setting, and the initial setting includes: detection area setting, installation method, and target feature setting.

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