JPH054071U - Radar equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] To obtain a radar device capable of always forming a desired transmitted / received beam even if the antenna is deformed by heat, external force, or the like. [Structure] A strain gauge 8 is attached in the vicinity of the antenna element 1, a displacement amount of the antenna element 1 is calculated from the output signal, and a correction amount calculator 9 for outputting element position correction data.
Then, based on the output from the correction amount calculator 9, a transmission controller 10 and a reception beamformer 11 for correcting the element position data held in advance to form a transmission / reception beam are provided. [Effect] By correcting the antenna element position data, it is possible to always form a desired transmission / reception beam.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a radar device for measuring the position and information of a target.

[0002]

[Prior Art]

 FIG. 2 shows an example of a conventional radar device. In the figure, 1 is an antenna element for transmitting and receiving radio waves, 2 is a transmitter that outputs a transmission signal, 3 is a receiver that converts the reception signal from the antenna element 1 to an intermediate frequency signal, and 4 is switching between transmission and reception. A transmission / reception switcher 5, a transmission controller for controlling the transmitter 2 to transmit a transmission beam, 6 a reception beamformer for combining signals from the receiver 3 to form a reception beam, Reference numeral 7 is a target information processor capable of tracking a target using the antenna beam obtained by the reception beam former.

Next, the operation will be described. When the transmission / reception switch 4 is transmitting, the transmission controller 5 calculates the transmission amplitude and the transmission phase for forming a desired transmission beam based on the antenna element position data, and outputs it to the transmitter 2. The transmitter adjusts the amplitude and phase of the transmitted signal according to this information and outputs it to the antenna element 1. The antenna element 1 radiates this output signal as a radio wave to form a transmission beam. Next, when the transmission / reception switch 4 is in the receiving state, the receiver 3 converts the reception signal input by the antenna element 1 into an intermediate frequency and outputs it to the reception beamformer 6. The reception beamformer 6 combines these signals based on the antenna element position data to form a reception beam. The target information processor 7 calculates the target position based on the output signal from the reception beam former 6.

[0004]

[Problems to be solved by the device]

 The conventional radar device is configured as described above, and the antenna element positions used when forming the transmission beam and the reception beam are those which are previously stored as data. Therefore, if the antenna is deformed due to heat or external force, and the antenna element position is displaced to a predetermined position, it cannot be corrected, the transmitted and received beams are deformed, and beam combining cannot be performed. However, there was a problem that the desired beam formation could not be achieved.

The present invention has been made in order to solve such a problem, and even if the antenna is deformed, the position of the antenna element can be corrected and a desired transmission / reception beam can always be formed. The purpose is to obtain a radar device.

[0006]

[Means for Solving the Problems]

 The radar device according to the present invention has a function of correcting the position of the displaced antenna element by attaching a strain gauge near the antenna element and calculating the displacement amount of the square antenna element from the output by a correction amount calculator. It is added.

[0007]

[Action]

 The radar device according to the present invention calculates the correction amount from the output from the strain gauge attached near the antenna element when calculating the transmission amplitude and the transmission phase for forming the desired transmission beam at the transmission controller during transmission. The displacement amount of the antenna element calculated by the controller is input as correction data to the transmission controller to correct the antenna element position.

Further, at the time of reception, the signal input from the antenna element is converted into an intermediate frequency by the receiver, and when beam combining is performed by the reception beam former, the output from the strain gauge attached near the antenna element. The displacement amount of the antenna element calculated by the correction amount calculator is input to the reception beamformer as correction data to correct the antenna element position.

Therefore, even when the antenna element is displaced due to heat or external force and the antenna element position is displaced, it is possible to correct the antenna element position and always form a desired transmission / reception beam.

[0010]

【Example】

 FIG. 1 shows an embodiment of the present invention, in which 1 to 4 and 7 are exactly the same as the conventional radar device. 8 is a strain gauge for measuring the amount of displacement in the vicinity of the antenna element, 9 is the displacement amount of the antenna element 1 with respect to a predetermined position from the output signal of the strain gauge 8 and outputs element position correction data. A correction amount calculator 10 receives the output of the correction amount calculator 9, and a transmission controller that controls the transmitter 2. A reference numeral 11 receives the output of the correction calculator 9 and outputs a signal from the receiver 3. It is a reception beamformer that combines and forms a beam.

Next, the operation will be described. The correction amount calculator 9 calculates the displacement amount of the antenna element 1 from the output signal of the strain gauge 8 attached near the antenna element 1. When the transmission / reception switch 4 is in the transmission state, the transmission controller 10 transmits a signal for forming a desired transmission beam based on the antenna element position data and the antenna element position correction data output from the correction amount calculator 8. The amplitude and the transmission phase are calculated and output to the transmitter 2. The transmitter 2 adjusts the amplitude and phase of the transmission signal according to this information and outputs it to the antenna element 1. The antenna element 1 radiates this output signal as a radio wave to form a transmission beam. Next, when the transmission / reception switch 4 is in the receiving state, the receiver 3 converts the reception signal input by the antenna element 1 into an intermediate frequency and outputs it to the reception beamformer 11. The reception beamformer 11 combines this signal with the antenna element position data and the antenna element position correction data output from the correction amount calculator 8 to form a reception beam. The target information processor 7 calculates the target position from the output signal from the reception beam former 6. With the above configuration, it is possible to correct the antenna element position and always form a desired transmission / reception beam.

Although the strain gauge is used as a means for measuring the displacement amount of the antenna element position in the above embodiment, the invention is not limited to this, and any device capable of measuring the displacement amount may be used.

[0013]

[Effect of the device]

 As described above, according to the present invention, in the radar device, even if the antenna element is deformed due to heat or external force and the antenna element position is displaced, the antenna element position can be corrected, and the desired transmission / reception is always performed. The beam can be formed.

[Brief description of drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention.

FIG. 2 is a block diagram showing a conventional radar device.

[Explanation of symbols]

 1 antenna element 2 transmitter 3 receiver 4 transmission / reception switcher 5 transmission controller 6 transmission / reception beam former 7 target information processor 8 strain gauge 9 correction amount calculator 10 transmission controller 11 reception beam former

Claims (1)

[Claims for utility model registration] 1. An antenna element for transmitting and receiving radio waves, and a transmitter for outputting a transmission signal to the antenna element.
A receiver for converting a microwave signal from the antenna element into an intermediate frequency signal, a displacement amount measuring means for measuring a displacement amount in the vicinity of the antenna element, and an output signal of the displacement amount measuring means of the antenna element from the output signal. Calculate the displacement,
A correction amount calculator that outputs element position correction data, a reception beam former that receives the correction data from the correction amount calculator and combines the signals from the receiver to form a reception beam, and the correction amount A transmission controller that controls the transmitter to receive the correction data from the arithmetic unit and transmit a transmission beam, and a target that can detect and track a target using the reception beam obtained by the reception beamformer A radar device comprising an information processor.