TWI481825B - Level detection device with integrated lens antenna - Google Patents

Description

Level detecting device with integrated lens antenna

The invention relates to a level detecting device, in particular to a level detecting device which integrates a lens antenna and a horn antenna to reduce damage and improve bandwidth.

In order to detect the height of the material or liquid level in a material bucket, an ultrasonic level gauge or a radar level gauge is installed on the wall of the top of the material bucket, and the time difference between the ultrasonic wave and the radar wave is calculated. The height of the material or liquid level, because the radar level gauge can obtain a more accurate material or liquid level than the ultrasonic level gauge, the radar level gauge has been widely used in various liquid level detection places.

The common radar level gauge mainly uses the FMCW (Frequency Modulated Continuous Waves) to detect the electromagnetic wave emitted by the radar and the time difference and frequency difference of the electromagnetic wave after the electromagnetic wave hits the test object, and calculate the radar level gauge and The distance between the substances to be tested can be converted into the height or level of the substance to be tested. Referring to FIG. 14, the radar level gauge 90 includes a body 91 and a horn antenna 92 connected to the base 91. The top end of the base 91 is hollow to accommodate more than one circuit board 93. A signal transceiver 94 is disposed at a bottom end of the base 91. The signal transceiver 94 and the circuit board 93 are electrically connected through a coaxial cable 95. The signal transceiver 94 transmits signals through the horn antenna 92 or transmits through the horn antenna 92. The horn antenna 92 receives the reflected signal to improve the directivity and bandwidth of the signal; the horn antenna 92 is provided with a lens antenna 96 at the opening to provide a sealing effect, since the horn antenna 92 has better directivity. The electromagnetic wave transmitted and received by the radar level gauge 90 is concentrated and has the advantage of long detection distance. When the seat body 91 is fixed to the wall of the material barrel, the horn antenna 92 and the lens antenna 96 extend into the material barrel and are exposed to the gas or liquid of the material barrel, which is easily affected by the environment inside the barrel or the substance to be tested (eg, High temperature, high pressure or acid/alkaline substances can cause corrosion, causing the problem that the horn antenna 92 and the lens antenna 96 of the radar level gauge 90 are damaged and cannot be measured.

Since the material barrel is generally designed to be a barrel or a cylinder, and the barrel wall at the top of the material barrel is usually designed to be curved to increase the pressure resistance, the radar level gauge signal when the radar level gauge is placed at the top of the material barrel The transceiver end (horn antenna 92 and lens antenna 96) will have an angular difference from the height of the substance to be tested, and there is a problem that the height of the actually detected liquid level is inaccurate.

As mentioned above, the existing radar level gauge is susceptible to damage by using an open horn antenna, and there is a problem that the detection angle cannot be arbitrarily adjusted to cause a detection height error. Therefore, the main purpose of the present invention is to provide an integrated type. The level detecting device of the lens antenna is mainly coated with a lens antenna assembly on the opposite side of the horn antenna of the radar level meter, and an angle adjusting device is arranged outside the lens antenna assembly to simultaneously solve the problem that the existing horn antenna is easily damaged. And can not arbitrarily adjust the angle of the question.

The main technical means for achieving the foregoing objective is that the above-mentioned level detecting device with an integrated lens antenna includes a radar level gauge, a horn antenna and a lens antenna assembly, and the radar level gauge includes a signal receiving and receiving unit. The end, the body and an adapter, the horn antenna is disposed at the signal receiving and receiving end, and the lens antenna assembly is disposed on an opposite outer side of the horn antenna, the base body has a top end and a bottom end, and a top end thereof is formed with a receiving portion The receiving portion is hollow to accommodate more than one circuit board, the seat body The bottom end is formed with a connecting portion, the adapter is in the form of a hollow column, and one end of the adapter is connected with the connecting portion of the bottom end of the base, and the other end of the adapter is the signal receiving end to the horn antenna and the lens The body of the antenna assembly is connected to the antenna assembly. The lens antenna assembly includes a hollow body and a lens antenna. The body is a horn antenna. One end of the body is provided with a lens antenna, and the other end of the body is formed with an opening. It is connected to the signal transmitting and receiving end, and the outer side wall of the body is formed with a joint portion for connecting an angle adjusting device.

The position detecting device with the integrated lens antenna formed by the foregoing components can prevent the horn antenna from being exposed to high temperature, high pressure and acid-alkaline corrosion environment because the body and the lens antenna of the lens antenna assembly are completely covered on the outer side of the horn antenna. Damaged, and the body of the lens antenna assembly is connected with an angle adjusting device. When the angle adjusting device is disposed on the material barrel, the signal receiving and receiving end of the radar level gauge, the horn antenna and the lens antenna assembly can be adjusted by the angle adjusting device. It solves the problem that the existing radar level gauge is easily damaged and the angle of detection cannot be arbitrarily adjusted.

10‧‧‧Radar level gauge

11‧‧‧

111‧‧‧ 容部

112‧‧‧Connecting Department

12‧‧‧Transfer seat

Angle antenna of 13‧‧‧

14‧‧‧Lens antenna assembly

141‧‧‧ Ontology

142‧‧‧ lens antenna

143‧‧‧Combination Department

20‧‧‧ Angle adjustment device

21‧‧‧Building upper flange

210‧‧‧Fixed holes

22‧‧‧Building lower flange

220‧‧‧Perforation

30‧‧‧material barrel

40‧‧‧ Angle adjustment device

41‧‧‧ universal joint joint

42‧‧‧ universal joint flange socket

421‧‧‧Upper support fixture

422‧‧‧Bottom support fixture

423‧‧‧Flange gasket

50‧‧‧ Angle adjustment device

51‧‧‧ joint

510‧‧‧Fixed holes

52‧‧‧ steering bearing

520‧‧ ‧ chute

521‧‧‧Perforation

90‧‧‧Radar level gauge

91‧‧‧ body

Horn antenna 92‧‧‧

93‧‧‧Circuit board

94‧‧‧Signal Transceiver

95‧‧‧Coaxial cable

96‧‧‧ lens antenna

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective and partial cross-sectional view showing a first preferred embodiment of the present invention.

Figure 2 is a partially exploded view of the first preferred embodiment of the present invention.

Figure 3 is a schematic view (1) of use of the first preferred embodiment of the present invention.

Figure 4 is a schematic view (2) of use of the first preferred embodiment of the present invention.

Figure 5 is a perspective and partial cross-sectional view showing a second preferred embodiment of the present invention.

Figure 6 is a partially exploded view of a second preferred embodiment of the present invention.

Figure 7 is a schematic view (1) of use of a second preferred embodiment of the present invention.

Figure 8 is a schematic view (2) of use of a second preferred embodiment of the present invention.

Figure 9 is a perspective and partial cross-sectional view showing a third preferred embodiment of the present invention.

Figure 10 is a partially exploded view of a third preferred embodiment of the present invention.

Figure 11 is a schematic view (1) of use of a third preferred embodiment of the present invention.

Figure 12 is a schematic view (II) of use of a third preferred embodiment of the present invention.

Figure 13 is a diagram showing the reflection coefficient of an antenna after combining a lens antenna assembly and a horn antenna according to a first preferred embodiment of the present invention.

Figure 14 is a schematic cross-sectional view of a conventional radar level gauge.

Referring to the first preferred embodiment of the present invention, as shown in FIGS. 1 and 2, the level detecting device includes a radar level gauge 10 and an angle adjusting device 20, and the radar level gauge 10 includes sequential a connecting body 11, an adapter 12, a horn antenna 13 and a lens antenna assembly 14, the base 11 has a top end and a bottom end, and a receiving portion 111 is formed at a top end thereof, and the receiving portion 111 is It is hollow to accommodate more than one circuit board (not shown), and has a connecting portion 112 formed at a bottom end thereof. The adapter 12 has a hollow column shape, and one end of the adapter 12 is a seat body. The connecting portion 112 at the bottom end of the connecting end is connected to the other end of the connecting base 12, and a signal transceiver (not shown) connected to the circuit board is provided as a signal transmitting and receiving end, and the end of the signal transmitting and receiving end is a cone. A horn antenna 13 is connected. The lens antenna assembly 14 includes a body 141 and a lens antenna 142. The body 141 is hollow for receiving the horn antenna 13. One end of the body 141 is provided with the lens antenna 142. The other end of the 141 is formed with an opening, which is rotated One end of the seat 12 is connected horn antenna 13 is connected, and the body outer wall 141 is formed with a coupling portion 143, the bonding portion 143 is connected with the angle adjustment means 20.

As shown in FIG. 2, the angle adjusting device 20 includes a masonry upper flange 21 and a masonry lower flange 22, and the masonry upper flange 21 and the two ends of the masonry lower flange 22 are differently constructed. The angle of the profile (i.e., the thickness of the both ends is different), a fixing hole 210 is formed in the center of the upper flange 21 of the building, and the fixing hole 210 is formed with a plurality of external threads to form a plurality of external threads with the outer side wall of the body 141 of the lens antenna assembly 14. In the mating engagement, a central portion of the lower flange 22 is formed with a perforation 220 for the lens antenna 142 to pass through.

Referring to FIGS. 3 and 4, when the radar level gauge 10 is disposed at the top end of a material tank 30, the lower mold flange 22 is connected to the material tank 30, and the upper flange 21 is rotated or adjusted. The relative position between the lower flange 22 and the lower flange 22 of the building is directly connected to the horn antenna 13 and the lens antenna assembly 14 when the thicker end of the upper flange 21 and the lower flange 22 are located on opposite sides. Downward, when the thicker end of the masonry upper flange 21 and the lower flange 22 is on the same side, the horn antenna 13 of the radar level gauge 10 and the lens antenna assembly 14 can be as shown in FIG. A detection wave (dotted line) is emitted toward the left side or a detection wave (dashed line) is emitted toward the right side as shown in FIG. 4 to detect different areas or compensate the angle when the barrel wall is tilted.

Referring to the second preferred embodiment of the present invention, as shown in FIGS. 5 and 6, the radar level gauge 10 is coupled to another angle adjusting device 40. The angle adjusting device 40 includes a universal joint joint 41. And a universal joint flange seat 42, the universal joint joint 41 is slightly spherical so as to be rotatably clamped in the universal joint flange seat 42, and the universal joint joint 41 is up and down An opening is formed at both ends, and an opening above the universal joint coupling seat 41 is formed with an internal thread to be mated with an external thread formed by the joint portion 143 of the outer wall of the body 141 of the lens antenna assembly 14, the opening of the universal joint joint 41 It is for the lens antenna assembly 14 to pass through. The universal joint flange socket 42 includes an upper support fixing member 421, a lower support fixing member 422 and a flange gasket 423. The upper support fixing member 421 and the lower support fixing member 422 are in the shape of a circular funnel. After the supporting fixture 422 is engaged with the flange gasket 423, the universal joint joint 41 is placed under the support In the fixing member 422, the upper supporting fixing member 421 and the lower supporting fixing member 422 are oppositely coupled, so that the universal joint joint 41 can be sandwiched in the universal joint flange seat 42.

Referring to FIGS. 7 and 8, when the radar level gauge 10 is disposed at the top end of the material tank 30 through the angle adjusting device 40, the universal joint flange socket 42 is connected to the material tank 30 and the universal joint joint 41 is rotatably inserted in the universal joint flange socket 42, so that the horn antenna 13 and the lens antenna 141 of the radar level gauge 10 are directed to the left side as shown in FIG. 7 or to the right side as shown in FIG. To detect different areas or to compensate for the angle at which the barrel wall is tilted.

Referring to the third preferred embodiment of the present invention, as shown in FIGS. 9 and 10, the radar level gauge 10 is coupled to a further angle adjusting device 50. The angle adjusting device 50 includes a coupling base 51 and a steering bearing. a fixing hole 510 having an internal thread is formed in the center of the coupling seat 51. The fixing hole 510 is connected to the external thread formed by the joint portion 143 of the outer wall of the body 141 of the lens antenna assembly 14, and is coupled to the seat 51. The bottom end is curved, the top end of the steering bearing 52 is formed with an arc-shaped sliding groove 520, and a hole 521 is formed at the center of the steering bearing 52. The arc of the bottom end of the coupling base 51 is opposite to the steering bearing 52. The chute 520 is matched for the joint 51 to slide to adjust the angle.

Referring to FIGS. 11 and 12, when the radar level gauge 10 is disposed at the top end of the material tank 30, the steering bearing 52 is coupled to the material tank 30 and the coupling seat 51 is slidably disposed on the steering bearing 52. In the chute 520, the horn antenna 13 and the lens antenna 141 of the radar level gauge 10 can be oriented to the left side as shown in FIG. 11 or to the right side as shown in FIG. 12 to detect different areas or compensate the barrel wall when tilting. angle.

The present invention is to provide the horn antenna 13 in the lens antenna assembly 14. The integrated reflection coefficient (S11) of the component is shown in Figure 13, which is designed and applied to the 24.0 GHz band. The reflection coefficient (S11) has a reflection coefficient (RL) of less than -10 dB below 24.0 GHz to 24.512 GHz, which meets design requirements, and has a reflection coefficient (RL) of -0.8 dB (BW) of up to 4.5 GHz ( 25.9GHz-21.4GHz=4.5GHz), it has a larger bandwidth than the existing radar level gauge, and can be applied to various harsh environments such as high temperature, high pressure and corrosion.

10‧‧‧Radar level gauge

11‧‧‧

111‧‧‧ 容部

112‧‧‧Connecting Department

12‧‧‧Transfer seat

Angle antenna of 13‧‧‧

14‧‧‧Lens antenna assembly

141‧‧‧ Ontology

142‧‧‧ lens antenna

143‧‧‧Combination Department

20‧‧‧ Angle adjustment device

21‧‧‧Building upper flange

22‧‧‧Building lower flange

Claims (6)

A level detecting device with an integrated lens antenna, comprising a radar level meter, a horn antenna and a lens antenna assembly, the radar level meter comprising a signal transceiver end, a body and an adapter, the horn The antenna is disposed at the signal receiving and receiving end, and the lens antenna assembly is disposed on the opposite outer side of the horn antenna. The base has a top end and a bottom end, and a receiving portion is formed at a top end thereof, and the receiving portion is hollow to accommodate More than one circuit board, the bottom end of the base body is formed with a connecting portion, the adapter seat is in the form of a hollow column, and one end of the adapter seat is connected with the connecting portion of the bottom end of the base body, and the other end of the adapter seat is the foregoing The signal receiving and receiving end is connected to the horn antenna and the body of the lens antenna assembly, wherein the lens antenna assembly includes a hollow body and a lens antenna, the body is for receiving the horn antenna, and one end of the body is disposed The lens antenna has an opening formed at the other end of the body, the opening being connected to the signal receiving end, and the outer side wall of the body is formed with a joint portion for connecting an angle adjusting device. The level detecting device of the integrated lens antenna according to claim 1, wherein the angle adjusting device comprises a masonry upper flange and a masonry lower flange, and a fixing hole is formed in a center of the upper flange of the masonry The fixing hole is formed with an internal thread to be mated with a plurality of external threads formed by the joint of the body, and a center of the lower flange is formed with a through hole, and the lens antenna is a through hole penetrating the lower flange of the building. The level detecting device with the integrated lens antenna according to claim 2, wherein the upper flange of the masonry and the lower flange of the masonry have different masonry angles, and the upper flange of the masonry is rotated or adjusted. The relative position to the lower flange of the masonry to adjust the angle of the fixing hole. The level detecting device of the integrated lens antenna according to claim 1, wherein the angle adjusting device comprises a universal joint joint and a universal joint flange socket, and the universal joint joint is slightly rounded. Spherically and rotatably disposed in the universal joint flange socket, and the upper and lower ends of the universal joint joint have an opening, and the opening above the universal joint joint is formed with a plurality of internal threads to be coupled with the lens antenna A plurality of external threads formed by the joint of the outer side walls of the assembly are mated, and the lens antenna is an opening that passes under the joint of the universal joint. The position detecting device of the integrated lens antenna according to claim 4, wherein the universal joint flange socket comprises an upper supporting fixing member, a lower supporting fixing member and a flange gasket, and the upper supporting fixing member And the lower support fixing member is divided into a circular funnel shape to sandwich the universal joint joint. The position detecting device of the integrated lens antenna according to claim 1, wherein the angle adjusting device comprises a coupling seat and a steering socket, and a center of the coupling seat is formed with a fixing hole having a plurality of internal threads, the fixing The hole is connected to a plurality of external threads formed by the joint of the outer wall of the lens antenna assembly, the bottom end of the joint is curved, and the top end of the steering socket is formed with an arc-shaped sliding groove. A through hole is formed in the center of the socket, and the lens antenna is a through hole penetrating the steering bearing seat, and the arc of the bottom end of the coupling seat is matched with the sliding groove of the steering bearing seat for adjusting the angle of the joint sliding.