CN111654331A - Hand-held wireless equipment for reducing antenna interference - Google Patents
Hand-held wireless equipment for reducing antenna interference Download PDFInfo
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- CN111654331A CN111654331A CN202010460747.0A CN202010460747A CN111654331A CN 111654331 A CN111654331 A CN 111654331A CN 202010460747 A CN202010460747 A CN 202010460747A CN 111654331 A CN111654331 A CN 111654331A
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- data acquisition
- wireless device
- acquisition module
- handheld wireless
- shielding structure
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- 238000004891 communication Methods 0.000 claims abstract description 6
- 239000004744 fabric Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 230000007306 turnover Effects 0.000 claims description 2
- 238000013461 design Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000012384 transportation and delivery Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B15/00—Suppression or limitation of noise or interference
- H04B15/02—Reducing interference from electric apparatus by means located at or near the interfering apparatus
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
- H04B5/77—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for interrogation
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Details Of Aerials (AREA)
- Aerials With Secondary Devices (AREA)
Abstract
The invention discloses a handheld wireless device for reducing antenna interference, wherein a data acquisition module and a communication antenna are arranged on a main board of the handheld wireless device, a shielding structure is arranged outside the data acquisition module, and a wire hole is formed in the shielding structure and used for a connecting wire for entering and exiting the data acquisition module. The data acquisition module is one of a scanning head, an RFID (radio frequency identification) module, an ultrahigh frequency UHF (ultra high frequency) module, an NFC (near field communication) reading module and a DPM (differential pulse width modulation) reading module. The data acquisition module is compatible with a plurality of models with different sizes, and the shielding structure is larger than the largest model size. The handheld wireless device for reducing antenna interference adopts the electromagnetic shielding principle, and when the product is designed in the prior period, the shielding structure is arranged outside the data acquisition module, so that the interference to antenna signals can be effectively reduced, and meanwhile, the handheld wireless device is compatible with data acquisition modules of other sizes and models, and has very high practical value.
Description
Technical Field
The invention relates to the field of wireless signal shielding, in particular to handheld wireless equipment for reducing antenna interference.
Background
With the development of internet technology, the traditional manual entry mode can not meet the development requirements of enterprises more and more. As a result, the office model of many businesses has begun to transition from the traditional model to the informational model. Data acquisition and data processing are carried out through the industrial mobile handheld terminal, the field work efficiency can be improved for enterprises, and the market competitiveness of the enterprises is improved.
However, for enterprises needing to purchase industrial-grade mobile handheld terminals, manufacturers and products in the market are various, and many times, which kind of products are suitable for the enterprises cannot be known, so that much confusion exists. The industrial mobile handheld terminal should be designed in consideration of the following points. The operating systems of the handheld terminal are generally divided into a Windows system and an Android system. The Windows operating system is stable, the Android operating system can support secondary development, and enterprises can select the Windows operating system according to self requirements. Processor (CPU): the improvement of indexes such as the digit number, the main frequency and the like of the CPU can accelerate the data processing speed of the handheld terminal and the stability of operation. At present, the scanning head can be divided into one-dimensional scanning and two-dimensional scanning. It should be noted that a two-dimensional head can scan one, two dimensions, while a one-dimensional head can scan only one dimension. RFID read/write functions: the RFID technology has the advantages of water resistance, magnetism prevention, high temperature resistance, long service life, large reading distance, capability of encrypting data on a label, larger storage data capacity, free change of stored information and the like which are not possessed by a bar code. RFID is classified into low frequency, high frequency, and ultra high frequency. Many times, the application environment of the handheld terminal is severe, the industrial protection level is higher, and the stability of the product in operation under the environments is higher. Such as oil stain, outdoor in the north and cold chain links, the protection level of the product is higher. There are special industrial applications, such as chemical plants, gas stations, etc., where the handheld terminal is required to have explosion-proof capability for use.
Due to the complexity of the industrial environment, many functional configurations are customizable by the handset manufacturer to meet the needs of the enterprise. Thus, not all configurations are as high as possible for an enterprise, and it is sufficient to customize the configuration according to its own application scenario and project requirements.
In short, the handheld terminal supports data acquisition modes such as one-dimensional bar code/two-dimensional code scanning, RFID radio frequency identification, ultrahigh frequency UHF, NFC identification and DPM identification. The IP67 has high industrial protection level, and is widely applied to the fields of logistics express delivery, production and manufacturing, public utilities, retail sale, medicine, agriculture and animal husbandry and the like.
For example, for a handheld terminal product with a high-frequency scanning head function, there is a common problem in the industry, that is, the interference of the high-frequency scanning head to the low frequency band of 824MHz-960MHz of a machine is generally 3-5dB, and more 10 dB. This has become a common problem in the industry. It is inevitable. When the high-frequency scanning head works, interference can be generated, and the interference can be solved by changing a matching circuit instead of simply tuning an antenna. And when the product is designed in the early stage, the high-frequency scanning head compatible with a plurality of manufacturer models needs to be considered. Since the high-frequency scanning heads of each manufacturer have different structures, one main board is matched with a plurality of high-frequency scanning heads, which is difficult to add.
Disclosure of Invention
The invention aims to: the handheld wireless equipment for reducing the antenna interference is provided, and the defects of the prior art are overcome by adopting the electromagnetic shielding principle during the design of the prior product.
The technical scheme of the invention is as follows:
the utility model provides a reduce handheld wireless device of antenna interference, be provided with data acquisition module and communication antenna on handheld wireless device's the mainboard, the data acquisition module outside is provided with shielding structure, and shielding structure is last to open wired hole for business turn over data acquisition module's connecting wire.
Preferably, the data acquisition module is one of a scanning head, an RFID radio frequency identification module, an Ultra High Frequency (UHF) module, an NFC recognition module, and a DPM recognition module.
Preferably, the shielding structure is designed as a shielding case and is attached to the main board area.
Preferably, the shielding structure is designed into an outer frame structure, and then metal spraying is performed on the outer frame structure.
Preferably, the shielding structure is wrapped by conductive cloth.
Preferably, the data acquisition module is compatible with a plurality of models with different sizes, and the shielding structure is larger than the largest model size.
The invention has the advantages that:
the handheld wireless device for reducing antenna interference adopts the electromagnetic shielding principle, and when the product is designed in the prior period, the shielding structure is arranged outside the data acquisition module, so that the interference to antenna signals can be effectively reduced, and meanwhile, the handheld wireless device is compatible with data acquisition modules of other sizes and models, and has very high practical value.
Drawings
The invention is further described with reference to the following figures and examples:
FIG. 1 is a schematic layout diagram of a motherboard of a high-frequency scanning handheld terminal device;
fig. 2 is a schematic diagram of a shielding structure of a high-frequency scanning head.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The details are as follows.
Examples
In this embodiment, a high-frequency barcode scanning handheld terminal of a certain model is taken as an example, as shown in fig. 1, the working frequency band of the high-frequency barcode scanning handheld terminal is 700 + 960MHz and 1710 + 210MHz, the top end of the motherboard 1 is provided with the communication antenna 3 and the high-frequency scanning head 2, and meanwhile, the product needs to be compatible with three scanning heads of different sizes, and it is found in actual debugging that the three scanning heads cannot be replaced with each other, and it often occurs that one antenna index meets the requirement, and is replaced with the other two high-frequency scanning heads, and the low-frequency index of the antenna is reduced by 3-5 dB.
The invention adopts the electromagnetic shielding principle to shield the scanning heads, and designs a shielding structure 4 by taking the maximum physical size of three scanning heads as the reference, as shown in figure 2, a wire hole 5 is simultaneously formed on the shielding structure 4 and is used for connecting flexible wires for entering and exiting the scanning heads.
The shielding structure can be designed into a shielding cover and attached to a mainboard area, or an outer frame structure with the same size is designed on the mainboard, then metal spraying is carried out on the outer frame structure, or a conductive cloth is selected to wrap the shielding structure, and in summary, the technical invention with the shielding effect is within the technology of the invention.
The number of the scanning heads in the design can be compatible with a plurality of scanning heads, only the largest shielding structure size corresponding to the scanning head with the largest size needs to be designed, and the scanning heads with the small sizes can be directly placed in the shielding structure.
In the product, the scanning head has interference on the low frequency of the antenna, no measures are adopted, the sensitivity of the antenna in the B5 frequency band is only-84.6 dBm, when the shielding structure is added, the TIS of the B5 can reach-92.5 dBm, 7dB is improved, and the scanning head can be compatible with other types of scanning heads, so that the scanning head has very high practical value.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose of the embodiments is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All modifications made according to the spirit of the main technical scheme of the invention are covered in the protection scope of the invention.
Claims (6)
1. The utility model provides a reduce handheld wireless device of antenna interference, be provided with data acquisition module and communication antenna on handheld wireless device's the mainboard, its characterized in that:
the data acquisition module is provided with shielding structure in the outside, and shielding structure is last to open wired hole for business turn over data acquisition module's connecting wire.
2. The handheld wireless device of claim 1, wherein the antenna interference is reduced by:
the data acquisition module is one of a scanning head, an RFID (radio frequency identification) module, an ultrahigh frequency UHF (ultra high frequency) module, an NFC (near field communication) reading module and a DPM (differential pulse width modulation) reading module.
3. The handheld wireless device of claim 1, wherein the antenna interference is reduced by:
the shielding structure is designed into a shielding case and is attached to the main board area.
4. The handheld wireless device of claim 1, wherein the antenna interference is reduced by:
the shielding structure is designed into an outer frame structure, and then metal spraying is carried out on the outer frame structure.
5. The handheld wireless device of claim 1, wherein the antenna interference is reduced by:
the shielding structure is wrapped by conductive cloth.
6. The handheld wireless device of claim 1, wherein the antenna interference is reduced by:
the data acquisition module is compatible with a plurality of models with different sizes, and the shielding structure is larger than the largest model size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010460747.0A CN111654331A (en) | 2020-05-27 | 2020-05-27 | Hand-held wireless equipment for reducing antenna interference |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010460747.0A CN111654331A (en) | 2020-05-27 | 2020-05-27 | Hand-held wireless equipment for reducing antenna interference |
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| Publication Number | Publication Date |
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| CN111654331A true CN111654331A (en) | 2020-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010460747.0A Pending CN111654331A (en) | 2020-05-27 | 2020-05-27 | Hand-held wireless equipment for reducing antenna interference |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201796368U (en) * | 2010-09-09 | 2011-04-13 | 北京农业信息技术研究中心 | Handheld device for monitoring circulation of agricultural and animal products |
| CN102262739A (en) * | 2011-07-21 | 2011-11-30 | 苏州中科集成电路设计中心有限公司 | Radio frequency identification (RFID) reader structure |
| CN202502209U (en) * | 2012-03-29 | 2012-10-24 | 上海市电力公司 | UHF information acquisition device |
| CN105445499A (en) * | 2015-12-16 | 2016-03-30 | 四川大学 | Scanning ion conductance microscopy glass probe clamping and illuminating device |
| CN207503237U (en) * | 2017-10-13 | 2018-06-15 | 李志毅 | Integrated bar code RFID scanner |
| CN209028640U (en) * | 2018-10-26 | 2019-06-25 | 深圳市鸿陆技术有限公司 | A kind of RFID rfid device |
-
2020
- 2020-05-27 CN CN202010460747.0A patent/CN111654331A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201796368U (en) * | 2010-09-09 | 2011-04-13 | 北京农业信息技术研究中心 | Handheld device for monitoring circulation of agricultural and animal products |
| CN102262739A (en) * | 2011-07-21 | 2011-11-30 | 苏州中科集成电路设计中心有限公司 | Radio frequency identification (RFID) reader structure |
| CN202502209U (en) * | 2012-03-29 | 2012-10-24 | 上海市电力公司 | UHF information acquisition device |
| CN105445499A (en) * | 2015-12-16 | 2016-03-30 | 四川大学 | Scanning ion conductance microscopy glass probe clamping and illuminating device |
| CN207503237U (en) * | 2017-10-13 | 2018-06-15 | 李志毅 | Integrated bar code RFID scanner |
| CN209028640U (en) * | 2018-10-26 | 2019-06-25 | 深圳市鸿陆技术有限公司 | A kind of RFID rfid device |
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Application publication date: 20200911 |
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| RJ01 | Rejection of invention patent application after publication |