CN214336437U - Full-shielding time measuring probe device - Google Patents

Abstract

The utility model discloses a full shield time measuring probe device, including even coaxial cable as an organic whole and butt joint socket, coaxial cable includes by interior heart yearn, insulating layer and the shielding layer of outer coaxial setting, and the heart yearn and the shielding layer of coaxial cable tail end are connected with the core wire end and the ground wire end of butt joint socket respectively, wherein, the junction overcoat of heart yearn and core wire end has the insulating part, the junction overcoat of shielding layer and ground wire end has first reinforcement, and first reinforcement covers the insulating part. The utility model discloses utilize the shielding layer to cover the junction of heart yearn, heart yearn and heart yearn end to can realize the shielding of whole probe device, shield effectually, signal interference is low, has improved measurement accuracy, and through the insulation and the reinforcement of insulating part and first reinforcement, can guarantee coaxial cable, the insulating nature and the firm in connection nature of butt joint socket, guarantee probe device's security and stability.

Description

Full-shielding time measuring probe device

Technical Field

The utility model relates to an impacted style response sensing technology field, concretely relates to accurate time measurement probe device of full shield.

Background

In the explosion and shock electrical measurement technology, a time interval test system is commonly used for measuring the detonation wave velocity and the shock wave velocity in the explosion and shock process, and a commonly used velocity signal acquisition means of the time interval test system is an electrical probe method. The electric probe in the electric probe method is essentially a 'travel switch' for detecting high-speed motion, and when detonation waves, shock waves, flying sheets and the like reach a tangent plane or a section where a sensitive part of the electric probe is located, the switch state of the electric probe is suddenly changed, so that a corresponding RC discharge circuit outputs a timing signal.

Common electrical probe structures include steel tube probes, drum probes, coaxial probes, and the like. The coaxial probe structure has extremely high response speed and strong anti-interference capability to impact action, and is applied to test occasions with high precision requirements. However, for the explosion and impact process testing system, the probe is firstly connected to the transmission cable by the lead wire, and then is connected to the signal recording device through the RC discharge circuit connected to the instrument placement area by the longer transmission cable, and often because the probe is not installed in place, an interference signal may be introduced to affect the normal recognition or no signal of the target signal, which affects the measurement accuracy, and moreover, the spring in the probe often causes the probe to be not conducted or to be always in a conducting state due to necrosis failure, the detection signal cannot be transmitted, and the quality of the leading edge of the signal is reduced due to impedance mismatch between the probe and the transmission cable, which affects the measurement accuracy.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, provide a shield time measuring probe device entirely.

The purpose of the utility model is mainly realized through the following technical scheme:

the utility model provides a full shield time measuring probe device, is including linking coaxial cable and butt joint socket as an organic whole, coaxial cable includes by interior heart yearn, insulating layer and the shielding layer of coaxial setting outside to, and the heart yearn and the shielding layer of coaxial cable tail end are connected with the heart yearn end and the ground wire end of butt joint socket respectively, wherein, the junction overcoat of heart yearn and heart yearn end has the insulating part, the junction overcoat of shielding layer and ground wire end has first reinforcement, and first reinforcement covers the insulating part.

Furthermore, a shielding layer on the end face of the head end of the coaxial cable is tinned.

Further, the tinning length is 10-20 mm.

Further, the length of the tinning is 15 mm.

Further, the coaxial cable tail end is also covered with a second reinforcing member, and the second reinforcing member covers the first reinforcing member.

Further, the insulating member and/or the second reinforcing member is a heat shrinkable tube.

Further, the first reinforcing member is a metal pipe.

Further, the coaxial cable and the mating receptacle have the same linear impedance.

Furthermore, the thickness of the insulating layer is 0.1-0.5 mm.

Furthermore, the coaxial cable further comprises a protective layer, and the protective layer covers the outer side of the shielding layer between the head end of the coaxial cable and the butt joint socket.

To sum up, compared with the prior art, the utility model has the following beneficial effects:

1. the utility model discloses utilize the shielding layer to cover the junction of heart yearn, heart yearn and heart yearn end to can realize the shielding of whole probe device, shield effectually, signal interference is low, has improved measurement accuracy, and through the insulation and the reinforcement of insulating part and first reinforcement, can guarantee coaxial cable, the insulating nature and the firm in connection nature of butt joint socket, guarantee probe device's security and stability.

2. The utility model discloses tin-plating at coaxial cable terminal surface shielding layer for coaxial cable terminal surface becomes hard, the probe device installation of not only being convenient for solves original spring probe and utilizes spring mounting's inconvenience and the fragile problem of welding part, and need not to add spring and matching resistance again, has formed the new probe structure that does not have spring probe, does not have matching resistance, has reduced the loss of probe and interference signal's introduction.

3. The utility model discloses a second reinforcement can further consolidate coaxial cable and the fastness of butt joint socket junction, and the second reinforcement can adopt the pyrocondensation pipe, and the heat shrinkable seals, can also keep the leakproofness of the two junction.

4. The utility model discloses a coaxial cable that linear impedance is the same docks with the butt joint socket, thereby can avoid arousing signal forward position quality degradation to influence measurement accuracy.

5. The utility model discloses insulating layer thickness carries out the strict control, not only can guarantee insulating effect, and signal quality is guaranteed, and can reduce the probe connection area, and then improves probe installation quantity, satisfies many probes user demand.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic cross-sectional view of a coaxial cable;

the symbols in the figures are respectively represented as:

1. a core wire; 2. an insulating layer; 3. a shielding layer; 4. a protective layer; 5. a docking socket; 6. a core wire end; 7. an insulating member; 8. a ground wire end; 9. a first stiffener; 10. a second stiffener; 11. a coaxial cable; 12. and a tin layer.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.

As shown in fig. 1 and fig. 2, the full-shielding time measuring probe apparatus of this embodiment includes a coaxial cable 11 and a docking socket 5 connected together, where the coaxial cable 11 includes a core wire 1, an insulating layer 2 and a shielding layer 3 coaxially disposed from inside to outside, the core wire 1 and the shielding layer 3 at the tail end of the coaxial cable 11 are respectively connected to a core wire end 6 and a ground wire end 8 of the docking socket 5, a joint of the core wire 1 and the core wire end 6 is covered with an insulating member 7, a joint of the shielding layer 3 and the ground wire end 8 is covered with a first reinforcing member 9, and the first reinforcing member 9 covers the insulating member 7.

Constitute complete probe structure after coaxial cable 11 and the connection of butt joint socket 5 of this embodiment, in use, directly be connected coaxial cable 11 head end and probe mounting panel, 1 ~ 2 mm's heart yearn connection length is shelled to the heart yearn 1 of coaxial cable 11 tail end, through the heart yearn 1 of shelling out with the mounting hole welding on the heart yearn end 6 of butt joint socket 5, cover insulating part 7 in the junction of heart yearn 1 and heart yearn end 6 again after the welding, cover and wrap up shielding layer 3 again on the ground wire end 8 of butt joint socket 5 and weld after accomplishing, the first reinforcement 9 of rethread covers after accomplishing, carry out the crimping with shielding layer 3 and heart yearn 1 and butt joint socket 5, butt joint socket 5 is connected with radio frequency coaxial connector during the end of use, can use after the connection is accomplished. The totally shielded time measuring probe device of this embodiment, through shielding layer 3 with heart yearn 1 and heart yearn end 6 junction shield, realize the totally shielded design of probe structure, it is effectual to shield, signal interference is low, and can seal the insulation with coaxial cable 11 and 5 junctions of butt joint socket through insulating part 7, and first reinforcement 9 then can guarantee the stability of coaxial cable 11 and 5 junctions of butt joint socket, avoid coaxial cable 11 and 5 junctions of butt joint socket to become flexible or twist off.

It should be noted that the tail end of the coaxial cable 11 refers to the tail end of the coaxial cable, i.e. the right end of the coaxial cable 11 in fig. 2, and on the contrary, the head end of the coaxial cable 11 refers to the front end of the coaxial cable, i.e. the left end of the coaxial cable 11 in fig. 2.

In addition, the docking socket 5 can be directly connected with a radio frequency coaxial connector by using a radio frequency coaxial connector mounting seat, so that the installation process of the probe device is simplified.

In the above structure, the core line 1 is a conventional signal line, such as a copper line, and the like, and the description thereof will not be repeated here.

The insulating layer 2 covers or is sleeved outside the core wire 1 for insulating the core wire 1. Specifically, the insulating layer may be made of polyethylene. Furthermore, the thickness of this insulating layer is 0.1 ~ 0.5mm, not only can guarantee insulating effect and signal quality, and with insulating layer thickness control at 0.1 ~ 0.5mm, still can guarantee its area of connection with the probe mounting panel, reduces the area occupied after the coaxial cable 11 is connected, and then can guarantee that the probe mounting panel can install more probe to satisfy the quantity demand that the probe used. Preferably, the thickness of the insulating layer is 0.3 mm.

The shielding layer 3 is a hollow sleeve structure covering the insulating layer 2 and is used for shielding the interference of external signals to the core wire 1. Specifically, the shielding layer 3 may be made of silver-plated copper mesh.

The insulating member 7 is mainly used for insulating the joint of the core wire 1 and the core wire end 6 so as to ensure the full shielding effect of the probe device. Specifically, insulator 7 optional pyrocondensation pipe, the pyrocondensation pipe is the flexible pipe of being made by the polyolefin material, it is insulating, waterproof characteristics, it gets into high-elastic state expansion after the heating, then get into the glass state shrink after the rapid cooling, insulator 7 heats earlier when using and covers heart yearn 1 and heart yearn end 6 junction, insulator 7 shrink covers heart yearn 1 and heart yearn end 6 junction pyrocondensation after the rapid cooling again, thereby utilize insulator 7 to realize insulating effect, and have the effect of protection and firm connection to heart yearn 1 and heart yearn end 6 junction.

The first reinforcement 9 serves to reinforce the junction between the coaxial cable 11 and the mating receptacle 5, increasing the stability of the junction. Specifically, the first reinforcement member 9 may be made of a hard material, such as metal, ceramic, or the like. Further, the first reinforcement 9 is a pipe member, so that it can be well sleeved with the coaxial cable 11 to cover the shielding layer 3, the core wire 1 and the butt socket 5. Preferably, the first reinforcement member 9 is a metal tube.

In this embodiment, a second reinforcement 10 may also be provided to enhance the robustness and stability of the connection between the coaxial cable 11 and the mating receptacle 5. Specifically, second reinforcement 10 sets up in the coaxial cable tail end, and the coaxial cable tail end covers through second reinforcement 10, and second reinforcement 10 covers first reinforcement 9, and then further reinforces and stereotypes coaxial cable 11 and butt joint socket 5 junction, first reinforcement 9 through second reinforcement 10. Further, for better protection of the first reinforcement 9, the internal insulation member 7, the core wire 1 and the like, the second reinforcement 10 may also be a heat shrinkable tube, and further, the compression sealing is realized by the heat shrinkage, and the insulation, waterproof and dustproof effects can be achieved.

In the above structure, the coaxial cable 11 further includes a protective layer 4, and the protective layer 4 covers the outer side of the shielding layer between the head end of the coaxial cable 11 and the docking socket 5. The protective layer 4 is used for protecting the coaxial cable 11, and can be made of materials selected according to specific protection directions, specifically polyvinyl chloride, polyethylene, nylon and the like, so as to achieve protection effects of water resistance, dust resistance, flame retardance and the like. Preferably, the protective layer 4 covers the outside of the shielding layer between the head end of the coaxial cable 11 and the second reinforcing member 10, so as to reduce the influence of the protective layer 4 on the connection at the connection.

In order to reduce the problem of loss and susceptibility to damage of the coaxial cable and to improve the convenience of mounting the probe device, the shielding layer 3 of the head end surface of the coaxial cable 11 of the present embodiment is tinned. Specifically, tin plating is carried out on the shielding layer 3 of the head end face of the coaxial cable 11, a tin layer 12 is plated by electroplating, dip plating, chemical plating and other methods, the head end face of the coaxial cable 11 after tin plating can be hardened due to the tin layer 12, and then the head end face of the coaxial cable is not easy to break during installation, the probe device convenient to install is convenient to install, meanwhile, the tin layer 12 has impedance, the probe matching resistance is not required to be connected, a probe structure without a spring probe and matching resistance is formed, and loss of the probe and introduction of interference signals are reduced. Further, the tin plating length is 10-20 mm, which is the length of the coaxial cable 11 in the axial direction, that is, the length of the tin layer 12. Thereby maximally securing the connection effect of the head end of the coaxial cable 11 and securing the impedance. Preferably, the length of the tin plating is 15 mm.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (10)

1. The utility model provides a full shield time measuring probe device, its characterized in that, is including linking coaxial cable as an organic whole and butt joint socket, coaxial cable includes by interior heart yearn, insulating layer and the shielding layer of outer coaxial setting, and the heart yearn and the shielding layer of coaxial cable tail end are connected with the heart yearn end and the ground wire end of butt joint socket respectively, wherein, the junction overcoat of heart yearn and heart yearn end has the insulating part, the junction overcoat of shielding layer and ground wire end has first reinforcement, and first reinforcement covers the insulating part.

2. The fully shielded time measurement probe apparatus of claim 1, wherein said shield on said head end face of said coaxial cable is tin plated.

3. The fully shielded time measurement probe device of claim 2, wherein the tinning length is 10-20 mm.

4. A fully shielded time measurement probe arrangement according to claim 3, characterized in that the tinning length is 15 mm.

5. The fully shielded time measurement probe device of claim 1, wherein the coaxial cable tail end is further covered with a second stiffener, and the second stiffener covers the first stiffener.

6. The full shield time measurement probe apparatus according to claim 5, wherein said insulating member and/or second reinforcing member is a heat shrink tube.

7. The fully shielded time measurement probe device of claim 1, wherein the first reinforcement member is a metal tube.

8. The fully shielded time measurement probe apparatus of claim 1, wherein the linear impedances of the coaxial cable and the docking receptacle are the same.

9. The fully shielded time measurement probe device of claim 1, wherein the thickness of the insulating layer is 0.1-0.5 mm.

10. The fully shielded time measurement probe device of claim 1, wherein said coaxial cable further comprises a protective layer covering an outer side of said shielding layer between said head end of said coaxial cable and said mating receptacle.

Images