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CN-224234053-U - Detection device

CN224234053UCN 224234053 UCN224234053 UCN 224234053UCN-224234053-U

Abstract

The utility model is applied to the technical field of detection, and provides detection equipment which comprises a shell, an antenna assembly, a shielding plate and a circuit unit, wherein an accommodating cavity is formed in the shell, the antenna assembly, the shielding plate and the circuit unit are arranged in the accommodating cavity, one side of the shielding plate is the antenna assembly, the other side of the shielding plate is the circuit unit, and the shielding plate is a component with an electromagnetic shielding function. The detection equipment provided by the utility model has higher detection precision and reduces the false alarm rate.

Inventors

  • LUO YUJIA

Assignees

  • 深圳市安卫普科技有限公司

Dates

Publication Date
20260512
Application Date
20250320

Claims (10)

  1. 1. A detection device characterized by comprising a housing (21), an antenna assembly (22), a shielding plate (23) and a circuit unit (24); The interior of the housing (21) has a receiving cavity; The antenna assembly (22), the shielding plate (23) and the circuit unit (24) are arranged in the accommodating cavity, one side of the shielding plate (23) is the antenna assembly (22), and the other side of the shielding plate (23) is the circuit unit (24); the shielding plate (23) is a member having an electromagnetic shielding function.
  2. 2. The detection device according to claim 1, characterized in that the shielding plate (23) is connected to or against the inner wall of the receiving cavity and divides the receiving cavity into a first chamber (213) and a second chamber (214); the antenna assembly (22) is located within the first chamber (213) and the circuit unit (24) is located within the second chamber (214).
  3. 3. The detection device according to claim 2, characterized in that it further comprises an electrically conductive element, which is located between the shielding plate (23) and the inner wall of the receiving cavity and is connected to the shielding plate (23) and the inner wall, respectively, wherein the electrically conductive element has an electromagnetic shielding function.
  4. 4. A probe apparatus according to claim 3, wherein the conductive member is a conductive member formed by curing a liquid conductive silver paste.
  5. 5. A detection device according to claim 3, characterized in that the inner wall of the housing (21) is provided with a conductive paint, and that the conductive paint is connected to the conductive member.
  6. 6. The detection device according to claim 1, characterized in that the shielding plate (23) is a metal plate.
  7. 7. The detection device according to any one of claims 1 to 6, characterized in that the antenna assembly (22) comprises an antenna plate (221), a transmitting antenna, a harmonic receiving antenna and a filter plate (222); The transmitting antenna and the harmonic receiving antenna are arranged on the antenna board (221); The filter plate (222) comprises a substrate (2221) and a filter, the substrate (2221) being located between the antenna plate (221) and the shielding plate (23); The filter is arranged on one side of the substrate (2221) away from the antenna board (221), and the filter is respectively connected with the harmonic receiving antenna and the circuit unit (24).
  8. 8. The detection device according to claim 7, wherein the antenna assembly (22) further comprises a first shield (223), the first shield (223) covering the filter; And/or the number of the groups of groups, The detection device further comprises a second shielding housing at least part of the circuit unit (24).
  9. 9. The detection device according to claim 7, characterized in that the circuit unit (24) is provided with a radio frequency insertion end, the filter being provided with a radio frequency mating end detachably electrically connected to the radio frequency insertion end; The shielding plate (23) is provided with a through hole for the radio frequency insertion end or the radio frequency matching end to pass through.
  10. 10. The detection device according to any one of claims 1 to 6, further comprising a display module (3), a flexible circuit board (4) and conductive foam; The display module (3) is electrically connected with the circuit unit (24) through the flexible circuit board (4); The conductive foam covers at least part of the flexible circuit board (4).

Description

Detection device Technical Field The utility model relates to the technical field of detection, in particular to detection equipment. Background Detection devices (e.g., nonlinear node detectors) often implement harmonic detection by transmitting fundamental signals to an object (e.g., an electronic device such as a cell phone) and receiving second and third harmonic signals of the object radiation. Since the circuit unit (e.g., rf board, baseband board, etc.) of the detection device also has the characteristics of the target object (e.g., nonlinear node), the circuit unit may also generate second and third harmonic signals under the influence of the fundamental wave signal when the conventional detection device is operated. The size of the current small-sized detecting device is generally smaller, an antenna and a circuit unit inside the small-sized detecting device are usually arranged in a probe at the front end, secondary and third harmonic waves generated by the circuit unit can be received by the antenna, and harmonic signals generated by the circuit unit are noise signals for the detecting device and can influence the detecting precision of the detecting device. Disclosure of utility model In view of the above, the embodiment of the utility model provides a detection device, so as to solve the problem that the second harmonic and the third harmonic generated by the circuit unit of the conventional small detection device may be received by the antenna, thereby affecting the harmonic detection result of the detection device. In order to achieve the above object, the embodiment of the present utility model provides the following technical solutions: a detection apparatus includes a housing, an antenna assembly, a shielding plate, and a circuit unit; The inside of the shell is provided with a containing cavity; The antenna assembly, the shielding plate and the circuit unit are arranged in the accommodating cavity, one side of the shielding plate is the antenna assembly, and the other side of the shielding plate is the circuit unit; The shielding plate is a member having an electromagnetic shielding function. Optionally, the shielding plate is connected with or props against the inner wall of the accommodating cavity and divides the accommodating cavity into a first cavity and a second cavity; the antenna assembly is located in the first chamber, and the circuit unit is located in the second chamber. Optionally, the detecting device further comprises a conductive member, and the conductive member is located between the shielding plate and the inner wall of the accommodating cavity and is connected with the shielding plate and the inner wall respectively, wherein the conductive member has an electromagnetic shielding function. Optionally, the conductive member is a conductive member formed by curing liquid conductive silver paste. Optionally, a conductive paint is provided on the inner wall of the housing, and the conductive paint is connected with the conductive member. Optionally, the shielding plate is a metal plate. Optionally, the antenna assembly comprises an antenna board, a transmitting antenna, a harmonic receiving antenna and a filter board; The transmitting antenna and the harmonic receiving antenna are arranged on the antenna board; the filter plate comprises a substrate and a filter, and the substrate is positioned between the antenna plate and the shielding plate; The filter is arranged on one side of the substrate, which is away from the antenna board, and is respectively connected with the harmonic receiving antenna and the circuit unit. Optionally, the antenna assembly further comprises a first shielding cover, a second shielding cover and a third shielding cover, wherein the first shielding cover is sleeved on the filter; And/or the number of the groups of groups, The detection device further includes a second shield housing at least a portion of the circuit unit. Optionally, the circuit unit is provided with a radio frequency insertion end, and the filter is provided with a radio frequency matching end which is detachably and electrically connected with the radio frequency insertion end; The shielding plate is provided with a through hole for the radio frequency insertion end or the radio frequency matching end to pass through. Optionally, the detection equipment further comprises a display module, a flexible circuit board and conductive foam; the display module is electrically connected with the circuit unit through the flexible circuit board; the conductive foam covers at least a portion of the flexible circuit board. Based on the detection device provided by the embodiment of the utility model, the housing is internally provided with the accommodating cavity, the antenna assembly, the shielding plate and the circuit unit are arranged in the accommodating cavity, the antenna assembly is arranged on one side of the shielding plate, and the circuit unit is arranged on the other side of t