Radio frequency cable phase fine trimming device

Abstract

The utility model discloses a radio frequency cable phase fine trimming device, and relates to the technical field of cable phase fine trimming equipment, the radio frequency cable phase fine trimming device comprises a device base body, the device base body is provided with a test interface, and the test interface is used for being connected with an external vector network analyzer through a connection test line; the position moving mechanism is installed on the device base body, and a sliding part is arranged on the position moving mechanism and used for driving a cable to move; the clamping mechanism is connected with the sliding part on the position moving mechanism and is used for clamping the cable and moving along with the sliding part; the position display mechanism is connected with the sliding part on the position moving mechanism and is used for detecting and displaying the moving displacement of the cable; the trimming mechanism is installed on the device base body and used for being matched with the clamping mechanism to achieve trimming and polishing of the cable. The digital display displacement ruler and the hand-cranking sliding table are used for monitoring and controlling the cutting size, manual length cutting according to experience is replaced, more accuracy is achieved, and the excessive cutting risk is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of cable phase trimming, and specifically, it is a radio frequency cable phase fine trimming device. Background Technique

[0002] At present, the single-port phase matching method is adopted in the phase matching processing industry of radio frequency cable assemblies: after the radio frequency cable is cut to the right length, one end connector is processed and assembled first, and then the connector is connected to the port of the vector network analyzer to test the single-end phase value. This method tests the phase value through the single-port emission-reflection-reception mode of electromagnetic waves, which has certain errors; in addition, when fine-tuning the phase value later, it is necessary to use wire cutters to trim the cable length bit by bit according to experience, with low efficiency, easy to trim excessively, and the end face is not flat, which is easy to cause test errors. Content of the Utility Model

[0003] The purpose of the utility model is to provide a radio frequency cable phase fine trimming device, which is used to solve the problems that there are errors in the phase fine trimming of radio frequency cable assemblies in the prior art, low efficiency in later fine trimming, easy to trim excessively, and the end face is not flat, which is easy to cause test errors.

[0004] The utility model solves the above problems through the following technical solutions:

[0005] A radio frequency cable phase fine trimming device includes:

[0006] A device base body, on which two test interfaces are arranged, and the two test interfaces are used to connect the two ends of the cable respectively, and each is connected to an external vector network analyzer through a connecting test line;

[0007] A position moving mechanism, installed on the device base body, and a sliding component is arranged on the position moving mechanism for driving the cable to move;

[0008] A clamping mechanism, connected to the sliding component on the position moving mechanism, for clamping the cable and moving together with the sliding component;

[0009] A position display mechanism, connected to the sliding component on the position moving mechanism, for detecting and displaying the moving displacement of the cable;

[0010] A trimming mechanism, installed on the device base body, for cooperating with the clamping mechanism to realize the trimming and grinding of the cable.

[0011] Further, the position moving mechanism includes a first base, a first lead screw, a handle, and a first slider. The first base is installed on the device base body. The first lead screw is rotatably connected to the first base. One end of the first lead screw passes through the first base and is connected to the handle. The side of the first lead screw away from the handle is drivingly connected to the first slider. The first slider, as a sliding component, is fixedly connected to the clamping mechanism and the position display mechanism.

[0012] Further, the other end of the first lead screw is provided with a first limiting structure or rotatably connected to a first fixing component, and the first fixing component is installed on the device base body.

[0013] Further, the first base is provided with a bearing, and the bearing is connected to the first lead screw.

[0014] Further, the first slider is provided with a lead screw nut, and the lead screw nut is connected to the first lead screw.

[0015] Further, the clamping mechanism includes a second lead screw, a second slider, a cable clamping block, a second base A, and a second base B. The second base A and the second base B are installed on the device base body. One end of the second lead screw is rotatably connected to the second base A, and the other end passes through the second slider and is rotatably connected to the second base B. The second base A and the second base B are provided with bearings connected to the second lead screw. The second slider is provided with a lead screw nut connected to the second lead screw. The second slider is fixedly connected to the sliding component of the position moving mechanism.

[0016] Further, one end of the second lead screw is rotatably connected to the second base A, and the other end sequentially passes through the second slider and the second base B and is connected to a rotating handle.

[0017] Further, cable clamping blocks are installed on both the second base A and the second slider.

[0018] Further, the cable clamping block includes a buffer pad and a bottom block. The bottom block is used for fixedly connecting to the second base A / second slider, and the buffer pad is pasted on the fitting surface of the bottom block.

[0019] Further, the position display mechanism includes a slide rail, a third slider, and two third bases. The third bases are installed on the device base body. The slide rail penetrates through the third slider and is slidably connected to the third slider. Both ends of the slide rail are fixedly connected to the two third bases respectively. The third slider is fixedly connected to the sliding component on the position moving mechanism. The third slider is internally provided with a displacement sensor, and the displacement sensor is communicatively connected to an external signal processing and display device.

[0020] Furthermore, the trimming mechanism is a sand table grinder, including a grinding wheel, a grinding wheel mounting plate, a servo motor, a cooling fan, a rotor, a support seat and a base plate; the grinding wheel is fixed on the mounting plate and connected to the rotor, and the servo motor drives the rotor to rotate; a cooling fan is also provided to dissipate heat for the servo motor, and the above-mentioned components are fixed on the base plate through the support seat, and the base plate is installed on the device base.

[0021] Furthermore, the connection test line includes a first RF connector, a phase-stable RF cable and a second RF connector, and the first RF connector and the second RF connector are connected to the test interface and the vector network analyzer respectively.

[0022] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0023] (1) The utility model can realize fast, accurate, and fine-tuning of the phase of the radio frequency cable. The cable can be directly used to quickly test the dual-channel phase value without repeatedly installing the plug; the cutting length of the control cable can be accurately displayed (accuracy 0.01mm) to prevent excessive trimming; and the end face processing quality can be effectively improved to reduce the test error.

[0024] (2) The utility model optimizes the initial phase test method from a single-ended reflection test to a double-ended continuous test, thereby reducing the test error.

[0025] (3) The utility model uses a sand table grinder to grind the cable end face instead of shearing pliers, making the cable end face smoother and reducing the test error.

[0026] (4) The utility model uses a digital displacement ruler and a hand-cranked slide to monitor and control the cutting size, replacing manual cutting based on experience, which is more accurate and reduces the risk of over-cutting.

[0027] (5) The utility model can use the phase fast calculation formula of an external vector network analyzer to quickly and accurately calculate the length of the cable to be cut, and optimize the experience-based multiple small-scale cutting, repeated assembly and continuous testing to one cutting and one testing, thereby improving efficiency.

[0028] (6) The utility model can directly utilize the existing vector network analyzer, hand-cranked slide, small bench vise, digital displacement ruler and sand table grinder. Through the connection method designed by the utility model, the trimming length, position movement, displacement monitoring and cable trimming can be obtained, which is simple to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the connection between the utility model and a vector network analyzer;

[0030] Figure 2 It is a schematic diagram of the structure of the utility model;

[0031] Figure 3 Schematic structural diagram of the connection test line;

[0032] Figure 4 Bottom view of the device base;

[0033] Figure 5 Front view of the device base;

[0034] Figure 6 Schematic structural diagram of the hand-operated slide;

[0035] Figure 7 Front view of the small bench vice;

[0036] Figure 8 Right view of the small bench vice;

[0037] Figure 9 Top view of the small bench vice;

[0038] Figure 10 Front view of the cable clamping block;

[0039] Figure 11 Schematic structural diagram of the bottom block and the buffer pad in the cable clamping block;

[0040] Figure 12 Schematic structural diagram of the digital display displacement ruler;

[0041] Figure 13 Schematic structural diagram of the sand table grinding machine;

[0042] Wherein: 1 - vector network analyzer; 2 - connection test line; 3 - device base; 4 - hand-operated slide; 5 - small bench vice; 6 - digital display displacement ruler; 7 - sand table grinding machine; 8 - signal processing and display device; 21 - RF connector at the network analyzer end; 22 - RF connector at the device end; 23 - microwave phase-stabilized RF cable; 31 - backplane; 32 - front panel; 33 - horizontal load-bearing plate; 34 - base; 35 - power switch; 36 - test interface; 41 - handle; 42 - slide base; 43 - first slider; 44 - first lead screw; 51 - rotating handle; 52 - bench vice base; 53 - second lead screw; 54 - second slider; 55 - cable clamping block; 61 - mounting base; 62 - slide rail; 63 - third slider; 71 - grinding wheel; 72 - grinding wheel mounting disc; 73 - servo motor; 74 - cooling fan; 75 - rotor; 76 - support seat; 77 - bottom plate; 551 - bottom block; 552 - buffer pad; 631 - displacement sensor. Specific embodiments

[0043] The following further describes the present invention in detail with reference to the embodiments, but the implementation manners of the present invention are not limited thereto.

[0044] Embodiment 1:

[0045] Combined with the attached Figure 1 and Figure 2 shown, a device for precise refinement of the phase of a radio frequency cable includes:

[0046] A device base body 3, on which two test interfaces 36 are provided. The two test interfaces 36 are used to connect the two ends of the cable respectively, and each is connected to an external vector network analyzer 1 through a connecting test line 2; the mechanical length to be trimmed is measured by the external vector network analyzer 1. The vector network analyzer 1 is used to test the phase value of the radio frequency cable, has a built-in or externally connectable display screen, has two or more test ports, and is connected to the test interface 36 on the device base body 3 by two connecting test lines 2.

[0047] Further, combined with Figure 4 and Figure 5 shown, the device base body 3 is fixedly connected by a back plate 31, a front panel 32, a horizontal load-bearing plate 33 and a base 34, and the material is a light metal plate, and the plates are connected and fixed by bolts, angle irons, etc.; the device base body 3 also includes a power switch 35. After the power switch 35 is turned on, power is supplied to the trimming mechanism, and the trimming mechanism works.

[0048] Further, combined with Figure 3 shown, the connecting test line 2 includes a device-end radio frequency connector 22, a microwave phase-stabilized radio frequency cable 23 and a network analyzer-end radio frequency connector 21. The device-end radio frequency connector 22 and the network analyzer-end radio frequency connector 21 are respectively connected to the test interface 36 and the vector network analyzer 1;

[0049] A position moving mechanism, installed on the device base body 3, and a sliding member is provided on the position moving mechanism for driving the cable to move;

[0050] A clamping mechanism, connected to the sliding member on the position moving mechanism, for clamping the cable and moving together with the sliding member;

[0051] A position display mechanism, connected to the sliding member on the position moving mechanism, for detecting and displaying the moving displacement of the cable;

[0052] A trimming mechanism, installed on the device base body 3, for cooperating with the clamping mechanism to realize the trimming and grinding of the cable.

[0053] During operation, first contact both ends of the cable with the test interface 36 simultaneously to test the initial phase of the test cable, and quickly calculate the mechanical length to be trimmed through the vector network analyzer 1. Then clamp the cable on the clamping mechanism, make the cable contact with the trimming mechanism through the position moving mechanism, turn on the power switch 35 on the device base 3 to energize the trimming mechanism, let the trimming mechanism work, continue to push the cable through the position moving mechanism, and observe the display value of the position display mechanism until the target length is reached to achieve precise phase trimming.

[0054] Embodiment 2:

[0055] Based on Embodiment 1, in combination with Figure 6 As shown, the position moving mechanism adopts a hand-cranked slide table 4. The hand-cranked slide table 4 includes a slide table base 42, a first lead screw 44, a handle 41, and a first slider 43. The slide table base 42 is installed on the device base 3. The first lead screw 44 is rotatably connected to the slide table base 42. One end of the first lead screw 44 passes through the slide table base 42 and is connected to the handle 41. The side of the first lead screw 44 away from the handle 41 is drivingly connected to the first slider 43. The first slider 43 is fixedly connected to the clamping mechanism and the position display mechanism as a sliding component.

[0056] Furthermore, the other end of the first lead screw 44 is provided with a first limiting structure or rotatably connected to a first fixing component, and the first fixing component is installed on the device base 3. The first fixing component can also adopt the same structure as the slide table base 42.

[0057] Furthermore, the slide table base 42 is provided with a bearing, and the bearing is connected to the first lead screw 44.

[0058] Furthermore, the first slider 43 is provided with a lead screw nut, and the lead screw nut is connected to the first lead screw 44.

[0059] Embodiment 3:

[0060] Based on Embodiment 1, in combination with Figure 7 , Figure 8 and Figure 9 As shown, the clamping mechanism adopts a small bench vise 5. The small bench vise 5 includes a second lead screw 53, a second slider 54, a cable clamping block 55, and two bench vise bases 52. The bench vise bases 52 are installed on the device base 3. One end of the second lead screw 53 is rotatably connected to one bench vise base 52, and the other end passes through the second slider 54 and is rotatably connected to the other bench vise base 52. The bench vise base 52 is provided with a bearing connected to the second lead screw 53. The second slider 54 is provided with a lead screw nut connected to the second lead screw 53. The second slider 54 is fixedly connected to the sliding component of the position moving mechanism.

[0061] Further, one end of the second lead screw 53 is rotatably connected to a vise base 52, and the other end sequentially passes through the second slider 54 and another vise base 52 and is connected with a turning handle 51.

[0062] Further, in combination with Figure 10 and Figure 11 as shown, a cable clamping block 55 is installed on the vise base 52 and the second slider 54 far from the turning handle 51.

[0063] Further, the cable clamping block 55 includes a buffer pad 552 and a bottom block 551. The bottom block 551 is used for fixedly connecting with the vise base 52 and the second slider 54 far from the turning handle 51, and the buffer pad 552 is pasted on the side of the bottom block 551 in contact with the cable.

[0064] Embodiment 4:

[0065] On the basis of Embodiment 1, in combination with Figure 12 as shown, the position display mechanism adopts a digital display displacement ruler 6. The digital display displacement ruler 6 includes a slide rail 62, a third slider 63 and two mounting bases 61. The mounting bases 61 are installed on the device base body 3. The slide rail 62 penetrates through the third slider 63 and is slidably connected with the third slider 63. Two ends of the slide rail 62 are respectively fixedly connected with the two mounting bases 61. The third slider 63 is fixedly connected with a sliding component on the position moving mechanism. A displacement sensor 631 is built in the third slider 63, and the displacement sensor 631 is communicatively connected with an external signal processing and display device 8 through a transmission line.

[0066] When a displacement sensor is built in the first slider 43 and the displacement sensor is communicatively connected with the external signal processing and display device 8, the above position display mechanism can be replaced.

[0067] Embodiment 5:

[0068] On the basis of Embodiment 1, in combination with Figure 13 as shown, the trimming mechanism is a sand table grinding machine 7. The sand table grinding machine 7 includes a grinding wheel 71, a grinding wheel mounting disc 72, a servo motor 73, a cooling fan 74, a rotor 75, a support base 76 and a bottom plate 77. The grinding wheel 71 is fixed on the grinding wheel mounting disc 72 and is connected with the rotor 75. The servo motor 73 works to drive the rotor 75 to rotate. A cooling fan 74 is also provided to dissipate heat from the servo motor 73. The above components are installed and fixed on the bottom plate 77 through the support base 76, and the bottom plate is installed on the device base body 3.

[0069] On the basis of the above embodiments, the working principle of the present utility model:

[0070] Fast Phase Testing of RF Cable: By using the concentric fitting test interface 36 at the cable end face, rapid connection and testing are achieved, replacing the method of first assembling the connector on the cable and then inserting it into the test interface, thus improving efficiency.

[0071] Principle of Precision Trimming: According to the phase difference measured, the cable size is precisely trimmed. The cable to be trimmed is installed on the cable clamping block 55, and the cable clamping block 55 is fixedly installed on the small bench vice 5. The small bench vice 5 is fixedly installed on the first slider 43 of the hand-operated sliding table 4, and the displacement amount is controlled by the handle 41. At the same time, the first slider 43 is rigidly connected to the third slider 63 of the digital display displacement ruler 6 by bolts. When the third slider 63 moves, the signal processing and display device 8 displays the displacement value.

[0072] Rotate the handle 41 of the hand-operated sliding table 4 to drive the first slider 43 to move, thereby driving the third slider 63 of the digital display displacement ruler 6 and the small bench vice 5 to move synchronously, enabling the cable end face to move towards the sand table grinding machine 7 and be ground shorter. The ground-shortening dimension is the value displayed on the digital display displacement ruler 6.

[0073] Although the present invention has been described herein with reference to its illustrative embodiments, the above embodiments are merely preferred embodiments of the present invention. The embodiments of the present invention are not limited by the above embodiments. It should be understood that those skilled in the art can design many other modifications and embodiments, which will fall within the scope and spirit of the principles disclosed in this application.

Claims

1. A radio frequency cable phase fine-tuning device, characterized in that: include: The device base is provided with two test interfaces, the two test interfaces are used to connect two ends of the cable respectively, and each is connected to an external vector network analyzer through a connecting test line; A position moving mechanism is installed on the device base, and a sliding component is provided on the position moving mechanism for driving the cable to move; A clamping mechanism connected to the sliding component on the position moving mechanism, used for clamping the cable and moving with the sliding component; A position display mechanism, connected to the sliding component on the position moving mechanism, for detecting and displaying the movement displacement of the cable; The trimming mechanism is installed on the device base and is used to cooperate with the clamping mechanism to trim and polish the cable.

2. The radio frequency cable phase fine-tuning device according to claim 1, characterized in that: The position moving mechanism includes a first base A, a first base B, a first screw rod, a handle and a first slider. The first base A and the first base B are installed on the device base. The first screw rod is rotatably connected to the first base A and the first base B. One end of the first screw rod passes through the first base A and is connected to the handle. The side of the first screw rod away from the handle is driven and connected to the first slider. The first slider is fixedly connected to the clamping mechanism and the position display mechanism as a sliding component. The other end of the first screw rod is rotatably connected to the first base B.

3. The radio frequency cable phase fine-tuning device according to claim 2, characterized in that: The first base is provided with a bearing, and the bearing is connected to the first screw rod.

4. The radio frequency cable phase fine-tuning device according to claim 2, characterized in that: The first sliding block is provided with a screw nut, and the screw nut is connected to the first screw.

5. The radio frequency cable phase fine-tuning device according to claim 1, characterized in that: The clamping mechanism includes a second screw rod, a second slider, a cable clamping block, a second base A and a second base B. The second base A and the second base B are installed on the device base. One end of the second screw rod is rotatably connected to the second base A, and the other end passes through the second slider and is rotatably connected to the second base B. The second base A and the second base B are provided with bearings connected to the second screw rod. The second slider is provided with a screw nut connected to the second screw rod. The second slider is fixedly connected to the sliding part of the position moving mechanism.

6. The radio frequency cable phase fine-tuning device according to claim 5, characterized in that: One end of the second screw rod is rotatably connected to the second base A, and the other end passes through the second slider and the second base B in sequence and is connected to a rotary handle.

7. A radio frequency cable phase fine-tuning device according to claim 5 or 6, characterized in that: The second base A and the second sliding block are both equipped with cable clamping blocks.

8. The radio frequency cable phase fine-tuning device according to claim 7, characterized in that: The cable clamping block comprises a buffer pad and a bottom block, wherein the bottom block is used for fixed connection with the second base A / the second sliding block, and the buffer pad is adhered to the fitting surface of the bottom block.

9. The radio frequency cable phase fine-tuning device according to claim 1, characterized in that: The position display mechanism includes a slide rail, a third slider and two third bases, the third base is installed on the device base, the slide rail passes through the third slider and is slidably connected to the third slider, the two ends of the slide rail are respectively fixedly connected to the two third bases, the third slider is fixedly connected to the sliding part on the position moving mechanism, the third slider has a built-in displacement sensor, and the displacement sensor is communicatively connected to an external signal processing and display device.

10. The radio frequency cable phase fine-tuning device according to claim 1, characterized in that: The trimming mechanism is a sand table grinder.

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