A parabolic spherical flat antenna for 26GHz high-frequency radar level meter

Abstract

The present invention relates to a parabolic spherical flat-plate antenna of a 26GHz high-frequency radar level meter, comprising a sensor, an emitter, a flat-plate flange, a small sealing ring and a large sealing ring. The emitter is made of a parabola combined with an optical lens principle and a high-purity polytetrafluoroethylene material to form a connector of a parabolic spherical body, a large cone, a cylinder and a small cone. A horizontal flange connection plate is provided at the connection between the parabolic spherical body and the large cone, which greatly reduces the beam angle of radar waves, greatly improves the penetration of radar waves and reduces the possibility of causing false echo signals in special working conditions. The antenna has high temperature resistance, reduces the attenuation of pulse electromagnetic waves, improves the performance of the radar level meter, and is suitable for use in working conditions with a large range and a small container diameter.

Description

Technical Field

[0001] The invention relates to a 26 GHz high frequency radar liquid level meter flat antenna, in particular to a parabolic spherical flat antenna of the 26 GHz high frequency radar liquid level meter. Background Art

[0002] At present, the flat-plate level meter antennas sold and used on the market are simple flat-plate antennas with tapered surface emitters. This makes the radar wave beam angle emitted by the radar through the emitter as large as 12°. For a large range of working conditions, this will cause serious attenuation of the radar level meter signal and even the possibility of wave loss. If the tank body is smaller in diameter, the radar wave will be directly emitted to the tank wall because the beam angle is too large, causing false echo signals to affect the measurement accuracy and cause failure to work normally on site. Summary of the invention

[0003] In view of the problems existing in the prior art, the present invention provides a parabolic spherical flat antenna for a 26GHz high-frequency radar level meter, so as to reduce the radar beam angle while enhancing the radar signal strength and penetration. The specific technical scheme is: a parabolic spherical flat antenna for a 26GHz high-frequency radar level meter, comprising a sensor, an emitter, a flat flange, a small sealing ring, and a large sealing ring. The emitter is a connector of a parabolic spherical body, a large cone, a cylinder, and a small cone. A horizontal flange connecting plate is provided at the connection between the parabolic spherical body and the large cone. The emitter is placed in the sensor, and the cylinder of the emitter is inserted into the emitting port of the sensor, and the large cone of the emitter is inserted into the inner cone surface of the sensor tightly. The large sealing ring is placed on the upper end surface of the boss of the horizontal flange connecting plate of the emitter, and the small sealing ring is placed on the outer cone surface of the sensor. The flat flange is placed on the small sealing ring on the outer cone surface of the sensor and pressed on the horizontal flange connecting plate of the emitter, and is fastened with threads to make the emitter and the sensor seal.

[0004] The upper end surface of the horizontal flange connection plate of the emitter is provided with an annular boss, and the size and position of the annular boss are the same as the size and position of the groove at the lower end of the flat flange.

[0005] The taper and height of the large cone of the emitter are the same as the taper and height of the inner cone of the sensor.

[0006] The emitter material is high-purity high-temperature resistant polytetrafluoroethylene.

[0007] The beneficial effect of the patent of this invention is that it greatly reduces the beam angle of the radar wave, greatly improves the penetration of the radar wave and reduces the possibility of causing false echo signals in special working conditions, reduces the attenuation of pulse electromagnetic waves, and improves the performance of the radar level meter. It is suitable for use in working conditions with a large range and small container diameter. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a structural cross-sectional view of the present invention;

[0009] Figure 2 It is a front view of the structure of the present invention;

[0010] Figure 3 It is a cross-sectional view of the emitter structure of the present invention. DETAILED DESCRIPTION

[0011] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0012] Embodiment 1

[0013] A parabolic spherical flat antenna for a 26GHz high-frequency radar level meter comprises a sensor 1, an emitter 2, a flat flange 3, a small sealing ring 4-1 and a large sealing ring 4-2.

[0014] Sensor 1 uses a 26GHz high-frequency radar flat-plate liquid level meter antenna sensor 1. The diameter of the transmitting port 1-2 of the sensor 1 is 8.5 mm, the finish is 0.4, and the diameter of the inner cone is 78 mm. According to the known parabola equation: X 2 =2PY, when the plane diameter of the parabola spherical body of emitter 2 is 78mm and the focal length of the parabola spherical body is 14mm, the height of the parabola spherical body is 28mm.

[0015] According to the emitter 2, which is a connection body of a parabola spherical body 2-1, a large cone 2-2, a cylinder 2-3, and a small cone 2-4, there is a horizontal flange connection plate 2-5 at the connection between the parabola spherical body 2-1 and the large cone 2-2. The annular boss on the upper end face of the horizontal flange connection plate 2-5 cooperates with the groove at the lower end of the flat flange 3. The large cone 2-2 of the emitter 2 has the same taper and height as the inner cone surface 1-1 of the sensor 1. The material of the emitter 2 is high-purity high-temperature resistant polytetrafluoroethylene. A 78mm emitter 2 is pressed out and the emitter 2 is placed in The cylinder 2-3 of the emitter 2 is inserted into the emission port 1-2 of the sensor 1, and the large cone 2-2 of the emitter 2 is inserted tightly into the inner cone surface 1-1 of the sensor 1. The large sealing ring 4-2 is placed on the upper end surface of the boss of the horizontal flange connection plate 2-5 of the emitter 2, and the small sealing ring 4-1 is placed on the cylindrical surface at the lower end of the outer cone surface of the sensor 1. The flat flange 3 is placed on the small sealing ring 4-1 on the sensor 1 and pressed on the horizontal flange connection plate 2-5 of the emitter 2, and is tightened with threads to make the emitter 2 and the sensor 1 seal.

[0016] By utilizing the principle of combining parabola with optical lens and using high-purity, high-temperature resistant polytetrafluoroethylene material, the radar beam is reduced from the original 12° to 3° through the 78mm emitter 2, thus achieving the purpose of greatly reducing the radar beam angle.

[0017] It should be noted that using the known parabola equation: X 2 =2PY, where: X is the plane diameter of the parabola spherical body, P is twice the focal length, and Y is the height of the parabola spherical body. The third value can be calculated based on any two known values, that is, the size of the emitter 2 can be calculated based on the sensor 1, and different sensors 1 can be selected based on the size of the emitter 2.

Claims

1. A parabolic spherical flat antenna for a 26 GHz high-frequency radar level meter, comprising a sensor (1), an emitter (2), a flat flange (3), a small sealing ring (4-1), and a large sealing ring (4-2), characterized in that: The emitter (2) is a connection body of a parabola spherical body (2-1), a large cone (2-2), a cylinder (2-3), and a small cone (2-4). A horizontal flange connection plate (2-5) is provided at the connection between the parabola spherical body (2-1) and the large cone (2-2). The emitter (2) is placed in the sensor (1), and the cylinder (2-3) of the emitter (2) is inserted into the emission port (1-2) of the sensor (1). The large cone (2-2) of the emitter (2) is inserted into the emission port (1-2) of the sensor (1). ) is inserted into the inner conical surface (1-1) of the sensor (1) and is tightly attached thereto, the large sealing ring (4-2) is placed on the upper end surface of the boss of the horizontal flange connection plate (2-5) of the emitter (2), the small sealing ring (4-1) is placed on the outer conical surface of the sensor (1), the flat flange (3) is placed on the small sealing ring (4-1) on the outer conical surface of the sensor (1) and pressed on the horizontal flange connection plate (2-5) of the emitter (2), and is tightened with threads so that the emitter (2) and the sensor (1) are sealed and matched; The upper end surface of the horizontal flange connection plate (2-5) of the emitter (2) is provided with an annular boss, and the size and position of the annular boss are the same as the size and position of the groove at the lower end of the flat flange (3); the taper and height of the large cone (2-2) of the emitter (2) are the same as the taper and height of the inner cone surface (1-1) of the sensor (1); the emitter (2) is made of high-purity high-temperature resistant polytetrafluoroethylene, and its special parabolic spherical surface enables the electromagnetic waves passing through to be emitted at a smaller beam angle.

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