Portable common-zero detection device

Abstract

The invention discloses a portable common-zero detection device which comprises a shell, a band-pass filter is arranged on one side of the interior of the shell, a low-frequency signal amplifier is arranged on the other side of the band-pass filter, and a microcontroller is arranged on the upper side of the interior of the shell; the pre-amplifier is installed on the middle side of the lower end of the shell, a coil is installed on the lower side of the pre-amplifier, a fixing block is fixedly installed on the outer side of the lower end of the shell, and a protection structure is connected to the outer side of the fixing block; the display screen is arranged on the middle side of the upper end of the shell, a transparent dustproof plate is connected to the outer side of the upper end of the shell, a fixing rod is connected to the outer side of the middle of the transparent dustproof plate, mounting rods are fixedly mounted on the front side and the rear side of the middle of the shell, and movable handles are connected to the outer sides of the mounting rods. According to the invention, the portability of the common-zero detection device can be improved, the protection performance of the preamplifier can be improved, the maintenance cost can be reduced, and the dustproof effect of the display screen can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of equipment detection, and in particular to a portable common-zero detection device. Background Art

[0002] The common-zero detection device is a device used to detect when the neutral wire and the ground wire are the same wire. During the use of the common-zero detection device, a portable structure needs to be utilized to meet the portability requirements of the common-zero detection device, thereby improving the use effect of the common-zero detection device.

[0003] However, most of the common zero detection devices in the prior art have the following shortcomings:

[0004] Firstly, the common-zero detection device is carried by a fixed handle. In actual use, the fixed handle occupies a large area. Secondly, the ordinary common-zero detection device has a poor protection effect on the preamplifier, which is easy to cause damage, thereby causing maintenance costs. In addition, the dust prevention of the common-zero detection display screen is not convenient enough, which affects the viewing of signal strength and channel coding. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a portable common-zero detection device, which can improve the portability of the common-zero detection device, improve the protection performance of the preamplifier, reduce the maintenance cost, and improve the dust-proof effect of the display screen.

[0006] As one aspect of the present invention, a portable common-zero detection device is provided, comprising a housing, a bandpass filter is arranged on one side of the housing, a low-frequency signal amplifier is arranged on the other side of the bandpass filter, and a microcontroller is arranged on the upper side of the housing, the microcontroller is located above the bandpass filter and the low-frequency signal amplifier; and further comprising:

[0007] A preamplifier is mounted on the middle side of the lower end of the housing, and a coil is mounted on the lower side of the preamplifier, a fixing block is fixedly mounted on the outer side of the lower end of the housing, and a protective structure is connected to the outer side of the fixing block, a mounting block is fixedly mounted on the outer side of the middle part of the housing, and a spring is fixedly mounted on the inner side of the mounting block;

[0008] A display screen is arranged on the middle side of the upper end of the shell, and a transparent dustproof plate is connected to the outer side of the upper end of the shell, and a fixing rod is connected to the outer side of the middle part of the transparent dustproof plate, and mounting rods are fixedly installed on both the front and rear sides of the middle part of the shell, and a movable handle is connected to the outer side of the mounting rod.

[0009] Preferably, the transparent dustproof plate is connected to the fixing rod by means of threads, and the fixing rod is symmetrically distributed front and back about the center line of the transparent dustproof plate.

[0010] Preferably, the transparent dustproof plate is connected to the display screen in a fitting manner.

[0011] Preferably, the movable handle is connected to the mounting rod in a rotational manner, and the cross-section of the movable handle is a "U"-shaped structure.

[0012] Preferably, the movable handle is connected to the mounting block in a snap-fit ​​manner, and the movable handle is connected to the spring sheet in a fitting manner.

[0013] Preferably, the protective structure includes a connecting block, which is installed on the outside of the fixed block, and the inner side of the connecting block is fixedly connected with a protective plate, and the outer side of the connecting block is installed with a limiting rod.

[0014] Preferably, the connecting block and the fixing block are connected by snapping, and the fixing blocks are symmetrically distributed about the center line of the preamplifier.

[0015] Preferably, the connecting block is connected to the limiting rod by means of threads and plays a role in fixing the protective plate.

[0016] The implementation of the embodiments of the present invention has the following beneficial effects:

[0017] The present invention provides a portable common-zero detection device, which is easy to carry, can reduce maintenance costs by protecting the preamplifier, and achieves a good dust-proof effect on the display screen;

[0018] In the present invention, the protective plate is installed on the outside of the preamplifier, so that the protective plate drives the connecting block to be installed on the outside of the fixed block; by rotating the limiting rod, the limiting rod is threadedly connected to the outside of the middle part of the connecting block, so that the limiting rod is threadedly connected to the outside of the fixed block, which is convenient for fixing the protective plate and protecting the preamplifier;

[0019] In the present invention, by pulling the movable handle, the movable handle is rotated upward on the outside of the mounting rod, so that the movable handle pushes the spring sheet to slide outward, and then the movable handle is separated on the inside of the mounting block, so that the movable handle is rotated to the upper side of the shell, and then the shell is conveniently carried by holding the movable handle by hand;

[0020] In the present invention, the transparent dustproof plate is fitted and connected to the upper side of the display screen, so that the display screen can be conveniently dustproofed. The fixing rod is then rotated to be threadedly connected to the outer side of the middle part of the transparent dustproof plate, so that the fixing rod slides outward on the outer side of the middle part of the transparent dustproof plate, and then the fixing rod is separated on the outer side of the upper end of the shell, and then the transparent dustproof plate is pulled upward to be separated on the upper end of the shell, so that the transparent dustproof plate is conveniently replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the present invention.

[0022] Figure 1 A schematic diagram of the overall cross-sectional structure of the connection between a housing and a bandpass filter in a portable common-zero detection device provided by the present invention;

[0023] Figure 2 For the present invention Figure 1 A schematic diagram of the enlarged structure of the local A in the middle;

[0024] Figure 3 For the present invention Figure 1 A schematic diagram of the enlarged structure of the local B in the middle;

[0025] Figure 4 It is a schematic diagram of the overall cross-sectional structure of the connection between the housing and the preamplifier of the present invention;

[0026] Figure 5 For the present invention Figure 4 Schematic diagram of the enlarged structure of the local C in the middle;

[0027] Figure 6 It is a schematic diagram of the overall cross-sectional structure of the connection between the housing and the mounting rod of the present invention.

[0028] In the figure: 1. housing; 2. bandpass filter; 3. low-frequency signal amplifier; 4. microcontroller; 5. preamplifier; 6. coil; 7. fixing block; 8. display screen; 9. transparent dustproof plate; 10. mounting block; 11. movable handle; 12. connecting block; 13. limit rod; 14. protective plate; 15. spring; 16. fixing rod; 17. mounting rod. DETAILED DESCRIPTION

[0029] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings.

[0030] like Figure 1 FIG. 1 is a schematic diagram showing the overall cross-sectional structure of the housing and the bandpass filter connected in a portable common zero detection device provided by the present invention, and is also referred to in conjunction with FIG. Figures 2 to 6As shown, in this embodiment, the present invention provides a portable common-zero detection device, which includes: a bandpass filter 2 is arranged on one side of the interior of a shell 1, and a low-frequency signal amplifier 3 is arranged on the other side of the bandpass filter 2, and a microcontroller 4 is arranged on the upper side of the interior of the shell 1, and the microcontroller 4 is located above the bandpass filter 2 and the low-frequency signal amplifier 3.

[0031] In practical applications, the ultra-low frequency signal transmitter is placed in the power supply line, and the ultra-low frequency signal is loaded into the power supply cable; the housing 1 is then placed along the cable and at the cable entry point, the source data is encoded and the output channel is encoded and a signal is sent through the ultra-low frequency signal transmitter, the space radio signal is received through the coil 6, after passing through the preamplifier 5, it is connected to the bandpass filter 2, and then enters the low-frequency signal amplifier 3, and is sampled by the microcontroller 4, demodulated to obtain a valid signal, and the transmitter code is restored, and the signal strength is displayed on the display screen 8, and the channel number is reserved;

[0032] More specifically, the preamplifier 5 is installed on the middle side of the lower end of the housing 1, and the coil 6 is installed on the lower side of the preamplifier 5, a fixing block 7 is fixedly installed on the outer side of the lower end of the housing 1, and the outer side of the fixing block 7 is connected with a protective structure, a mounting block 10 is fixedly installed on the outer side of the middle part of the housing 1, and a spring 15 is fixedly installed on the inner side of the mounting block 10, and the protective structure is installed on the outer side of the preamplifier 5, so that the protective structure is installed on the outer side of the fixing block 7, and the protective structure is rotated so that the protective structure is connected on the outer side of the fixing block 7 to facilitate the protection of the preamplifier 5;

[0033] The display screen 8 is arranged at the middle side of the upper end of the housing 1, and a transparent dustproof plate 9 is connected to the outer side of the upper end of the housing 1, and a fixing rod 16 is connected to the outer side of the middle of the transparent dustproof plate 9, and mounting rods 17 are fixedly installed on both sides of the middle of the housing 1, and a movable handle 11 is connected to the outer side of the mounting rod 17. The movable handle 11 is pulled to rotate the movable handle 11 upward on the outer side of the mounting rod 17, so that the movable handle 11 pushes the spring sheet 15 to slide outward, and then the movable handle 11 is separated from the inner side of the mounting block 10, so that the movable handle 11 is rotated to the outside. The upper side of the shell 1 is held by the movable handle 11, which is convenient for carrying the shell 1. The transparent dustproof plate 9 connected to the upper side of the display screen 8 is convenient for dustproofing the display screen 8. Then, by rotating the fixing rod 16, the fixing rod 16 is connected to the outer side of the middle part of the transparent dustproof plate 9, so that the fixing rod 16 slides outward on the outer side of the middle part of the transparent dustproof plate 9, and then the fixing rod 16 is separated on the outer side of the upper end of the shell 1, and then the transparent dustproof plate 9 is pulled upward to separate the transparent dustproof plate 9 at the upper end of the shell 1, which is convenient for replacing the transparent dustproof plate 9.

[0034] When using the common zero detection device, specifically Figure 1 and Figure 2 In the process, the ultra-low frequency signal transmitter is placed in the power supply line to load the ultra-low frequency signal in the power supply cable, and then the housing 1 is placed along the cable and at the cable entrance. The source data and the output channel are encoded and sent out through the ultra-low frequency signal transmitter. The space radio signal is received through the coil 6, and after passing through the preamplifier 5, it is connected to the bandpass filter 2, and then enters the low-frequency signal amplifier 3. The microcontroller 4 samples and demodulates the effective signal, restores the transmitter code, and displays the signal strength on the display screen 8, and reserves the channel number. The connection block 12 and the fixed block 7 are connected. The protective plate 14 is installed on the outside of the preamplifier 5 so that the protective plate 14 drives the connecting block 12 to be connected on the outside of the fixing block 7. The connecting block 12 is connected to the limiting rod 13 by a threaded connection and plays a role in fixing the protective plate 14. The limiting rod 13 is rotated so that the limiting rod 13 is threadedly connected to the outside of the middle part of the connecting block 12, so that the limiting rod 13 is threadedly connected to the outside of the fixing block 7, which is convenient for fixing the protective plate 14, thereby facilitating the protection of the preamplifier 5.

[0035] Specific as Figure 3 , Figure 4 and Figure 6 As shown, the movable handle 11 is connected to the mounting rod 17 by means of rotation, and the cross-section of the movable handle 11 is a "U"-shaped structure. The movable handle 11 is pulled to rotate upward on the outside of the mounting rod 17, and the movable handle 11 is connected to the mounting block 10 by means of a snap fit, and the movable handle 11 is connected to the spring sheet 15 by means of a fit fit, so that the movable handle 11 pushes the spring sheet 15 to slide outward, and then the movable handle 11 is separated from the inside of the mounting block 10, and the movable handle 11 is rotated to the upper side of the housing 1, and then the movable handle 11 is held by hand to facilitate carrying the housing 1;

[0036] Specific as Figure 3 , Figure 4 and Figure 5As shown, since the transparent dustproof plate 9 and the display screen 8 are connected in a fitting manner, the transparent dustproof plate 9 fitted and connected on the upper side of the display screen 8 can conveniently protect the display screen 8 from dust. The transparent dustproof plate 9 and the fixing rod 16 are connected in a threaded manner, and the fixing rod 16 is symmetrically distributed front to back about the center line of the transparent dustproof plate 9. The fixing rod 16 is then rotated to be threadedly connected to the outer side of the middle part of the transparent dustproof plate 9, so that the fixing rod 16 slides outward on the outer side of the middle part of the transparent dustproof plate 9, and then the fixing rod 16 is separated from the outer side of the upper end of the outer shell 1, and then the transparent dustproof plate 9 is pulled upward to separate the transparent dustproof plate 9 from the upper end of the outer shell 1, so that the transparent dustproof plate 9 can be replaced conveniently.

[0037] The implementation of the embodiments of the present invention has the following beneficial effects:

[0038] The present invention provides a portable common-zero detection device, which is easy to carry, can reduce maintenance costs by protecting the preamplifier, and achieves a good dust-proof effect on the display screen;

[0039] In the present invention, the protective plate is installed on the outside of the preamplifier, so that the protective plate drives the connecting block to be installed on the outside of the fixed block; by rotating the limiting rod, the limiting rod is threadedly connected to the outside of the middle part of the connecting block, so that the limiting rod is threadedly connected to the outside of the fixed block, which is convenient for fixing the protective plate and protecting the preamplifier;

[0040] In the present invention, by pulling the movable handle, the movable handle is rotated upward on the outside of the mounting rod, so that the movable handle pushes the spring sheet to slide outward, and then the movable handle is separated on the inside of the mounting block, so that the movable handle is rotated to the upper side of the shell, and then the shell is conveniently carried by holding the movable handle by hand;

[0041] In the present invention, the transparent dustproof plate is fitted and connected to the upper side of the display screen, so that the display screen can be conveniently dustproofed. The fixing rod is then rotated to be threadedly connected to the outer side of the middle part of the transparent dustproof plate, so that the fixing rod slides outward on the outer side of the middle part of the transparent dustproof plate, and then the fixing rod is separated on the outer side of the upper end of the shell, and then the transparent dustproof plate is pulled upward to be separated on the upper end of the shell, so that the transparent dustproof plate is conveniently replaced.

[0042] The above disclosure is only a preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A portable common zero detection device, comprising a housing (1), characterized in that: A bandpass filter (2) is arranged on one side of the interior thereof, and a low-frequency signal amplifier (3) is arranged on the other side of the bandpass filter (2), and a microcontroller (4) is arranged on the upper side of the interior of the housing (1), and the microcontroller (4) is located above the bandpass filter (2) and the low-frequency signal amplifier (3); Further including: A preamplifier (5) is mounted on the middle side of the lower end of the housing (1), and a coil (6) is mounted on the lower side of the preamplifier (5); a fixing block (7) is fixedly mounted on an outer side of the lower end of the housing (1), and a protective structure is connected to the outer side of the fixing block (7); a mounting block (10) is fixedly mounted on the outer side of the middle portion of the housing (1), and a spring (15) is fixedly mounted on the inner side of the mounting block (10); A display screen (8) is arranged at the middle side of the upper end of the housing (1), and the upper end of the housing (1) is located on the outer side of the display screen (8) and is connected to a transparent dustproof plate (9), and the middle outer side of the transparent dustproof plate (9) is connected to a fixing rod (16), and the middle front and rear sides of the housing (1) are fixedly installed with mounting rods (17), and the outer side of the mounting rods (17) is connected to a movable handle (11).

2. The device according to claim 1, characterized in that The transparent dustproof plate (9) and the fixing rod (16) are connected in a threaded manner, and the fixing rod (16) is symmetrically distributed frontward and rearward about the center line of the transparent dustproof plate (9).

3. The device according to claim 2, characterized in that The transparent dustproof plate (9) and the display screen (8) are connected in a fitting manner.

4. The device according to claim 3, characterized in that The movable handle (11) is connected to the mounting rod (17) in a rotational manner, and the cross-sectional shape of the movable handle (11) is a "U"-shaped structure.

5. The device according to claim 4, characterized in that The movable handle (11) is connected to the mounting block (10) in a snap-fitting manner, and the movable handle (11) is connected to the spring sheet (15) in a fitting manner.

6. The device according to any one of claims 1 to 5, characterized in that The protective structure comprises a connecting block (12), the connecting block (12) being mounted on the outside of the fixing block (7), a protective plate (14) being fixedly connected to the inside of the connecting block (12), and a limiting rod (13) being mounted on the outside of the connecting block (12).

7. The device according to claim 6, characterized in that: The connection block (12) and the fixing block (7) are connected in a snap-fit ​​manner, and the fixing block (7) is symmetrically distributed with respect to the center line of the preamplifier (5).

8. The device according to claim 7, characterized in that: The connecting block (12) and the limiting rod (13) are connected in a threaded manner and play a role in fixing the protective plate (14).

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