CN115796200B - Be used for wisdom building site wisdom warehouse system of transformer substation - Google Patents
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Abstract
The invention relates to the technical field of warehousing and provides an intelligent warehousing system for an intelligent construction site of a transformer substation, wherein a card reading module comprises an operational amplifier module and an antenna tuning network module; the operational amplifier module comprises a radio frequency amplifying circuit, a low-pass filter circuit, a directional coupling circuit and a radio frequency detection circuit; the radio frequency input port of the radio frequency amplifying circuit is connected with the port of the read-write module, and the radio frequency output end of the radio frequency amplifying circuit is connected with the access end of the low-pass filter circuit; the directional coupler is respectively connected with the radio frequency output end of the low-pass filter circuit, the access end of the antenna tuning network module and the access end of the radio frequency detection circuit; the article is identified by the operational amplifier module in the card reading module, the working efficiency is improved, the problem of low identification rate and the limit of identification distance are solved, the inductance value of the tuning circuit is adjusted by the antenna tuning network module, a dynamic tuning network is formed, the receiving of different frequency bands can be realized, the performance of a card reader is ensured, and the card reading stability is improved.
Description
Technical Field
The invention relates to the technical field of intelligent warehouse management, in particular to an intelligent warehouse system for an intelligent building site of a transformer substation.
Background
In the construction process of the transformer substation, a lot of expensive mechanical materials, electric power equipment and the like are used. In the process of borrowing or capturing objects, most of the objects are managed by utilizing warehouse administrators, and due to special conditions of people, the objects are always lost or replaced, so that an intelligent warehouse management system is very necessary to be established, and materials used in the transformer substation construction process are accurately managed and traced.
The existing intelligent warehouse system of the intelligent substation site uses a bar code warehouse management system, and the following problems exist by scanning and identifying bar codes on articles: when a first material receiving member and a second material receiving member receive a plurality of materials or a plurality of articles or a plurality of material receiving members receive a plurality of articles at the same time, the materials can be rapidly identified and read; and when the second object and the article need to be identified, the material cannot be placed on the material table for identification due to special conditions.
For the above reasons, it is necessary to improve the existing intelligent warehouse system of the intelligent substation to satisfy the problems in the intelligent warehouse.
Disclosure of Invention
The invention solves the problem of how to provide an intelligent warehouse system for an intelligent construction site of a transformer substation.
In order to solve the problems, the invention provides an intelligent warehouse system for a transformer substation intelligent building site, which comprises a card reading module, a power supply module, an operational amplifier module and an antenna tuning network module, wherein the card reading module comprises a read-write module, a card reading main control module, a card reading power supply module, an operational amplifier module and an antenna tuning network module; the card reading power module is respectively and electrically connected with the read-write module, the card reading main control module and the operational amplifier module, and the operational amplifier module comprises a radio frequency amplifying circuit, a low-pass filter circuit, a directional coupling circuit and a radio frequency detection circuit; the radio frequency input port of the radio frequency amplifying circuit is electrically connected with the REOUT port of the read-write module, and the radio frequency output end of the radio frequency amplifying circuit is electrically connected with the access end of the low-pass filter circuit; the directional coupler is respectively and electrically connected with the radio frequency output end of the low-pass filter circuit, the access end of the antenna tuning network module and the access end of the radio frequency detection circuit; the output end of the radio frequency detection circuit is electrically connected with the card reading main control module; the output end of the antenna tuning network module is provided with a regulating antenna module, and the regulating antenna module is provided with an antenna.
According to the preferred technical scheme, a radio frequency output end of the radio frequency amplifying circuit is electrically connected with one end of a first inductor, the other end of the first inductor is electrically connected with one end of a first capacitor, and the other end of the first capacitor is electrically connected with an access end of the low-pass filter circuit.
According to the preferred technical scheme, the output end of the low-pass filter circuit is electrically connected with one end of the second capacitor, and the other end of the second capacitor is electrically connected with the directional coupler.
According to the preferred technical scheme, a coupling end of the directional coupling circuit is electrically connected with an input end of the filtering voltage dividing circuit, an output end of the filtering voltage dividing circuit is electrically connected with a radio frequency signal input interface of the radio frequency detector (radio frequency input and turn-off logic input. The RF input is AC coupled to the pin and turn-off logic is applied, the low level is driven to turn off the device and the high level is driven or connected to VCC to turn on the device through resistance input), a power supply pin of the radio frequency detector is electrically connected with a power supply, a radio frequency signal output end of the radio frequency detector is electrically connected with a card reading main control module, and a port of the radio frequency detector is grounded.
According to the preferred technical scheme, the input end of the directional coupler is electrically connected with the other end of the second capacitor, the isolation end of the directional coupler is electrically connected with the receiving end of the read-write module, and the transmitting end of the directional coupler is electrically connected with the antenna tuning network module.
According to the preferred technical scheme, the antenna tuning network module is provided with a coordination unit and a connection module, the access end of the coordination unit is electrically connected with the transmitting end of the directional coupler, the output end of the coordination unit is electrically connected with the access end of the regulation antenna module, and the connection module is electrically connected with pins in the coordination unit.
According to the preferred technical scheme, three groups of coordination units are arranged, each group of coordination units are connected in series, the access end of the first coordination unit is electrically connected with the transmitting end of the directional coupler, and the output end of the third coordination unit is connected with the input end of the regulating antenna module.
In the preferred technical scheme, each group of coordination units comprises four tuning circuits, and each tuning circuit is connected in series; the tuning circuit comprises first change-over switches, and the input ends of the common terminals of the four first change-over switches are connected in series; the output end of the normally open terminal of the first change-over switch is electrically connected with one end of the second inductor, and the two ends of the second inductor are grounded; the normally closed terminal of the first change-over switch is electrically connected with one end of the third inductor, and the two ends of the third inductor are grounded; the input end of the normally open terminal and the input end of the normally closed terminal are respectively connected with the corresponding pins of the connecting module.
The preferable technical scheme is that the regulation antenna module comprises a second change-over switch, a first antenna socket and a second antenna socket; the output end of the normally open terminal of the second change-over switch is electrically connected with one end of a fourth capacitor, and the other end of the fourth capacitor is electrically connected with the first antenna socket; the output end of the normally closed terminal of the second change-over switch is electrically connected with one end of a fifth capacitor, and the other end of the fifth capacitor is electrically connected with the second antenna socket; the common terminal of the second change-over switch is connected with one end of a sixth capacitor, and two ends of the sixth capacitor are connected with the three groups of coordination units in a collinear manner; the input end of the normally open terminal in the second change-over switch and the input end of the normally closed terminal in the second change-over switch are respectively connected with the corresponding ports of the card reading main control module.
The preferred technical scheme is that the card reading module further comprises a digital-to-analog signal conversion circuit, wherein the input end of the digital-to-analog signal conversion circuit is connected with the output end of the power control voltage of the radio frequency amplifying circuit, and the output end of the digital-to-analog signal conversion circuit is electrically connected with the card reading main control module.
Compared with the prior art, the invention has the beneficial effects that:
when the antenna tuning network module is used, the read-write module, the card reading main control module, the card reading power module, the operational amplifier module and the antenna tuning network module can be packaged to serve as a read-identification device; when the reading and identifying device identifies the RFID tag on the article, the working efficiency and the output power are improved, and the reading and writing distance is also enhanced; the high-frequency signals are filtered and adjusted through the low-pass filter, so that the anti-interference capability of the RFID card reader is improved; the directional coupler is mainly used for signal isolation, and prevents reflected signals from entering the receiver when the signals are transmitted, so that the LNA inside the receiver is saturated; the radio frequency detection circuit is used for detecting the signal power of the coupling port and the isolation port of the directional coupler, and the antenna tuning network module finds an optimal signal isolation point (the lowest level point received by RX is the optimal isolation position during TX transmission) by continuously adjusting the impedance of the tuning network when different antennas are used by a user because the impedance of the antennas is inconsistent. When the card reader with the antenna tuning network is added, the performance of the card reader is not affected because the working frequency points of the antennas are inconsistent. The dynamic tuning network can match the antenna to the optimal state, so that the performance of the card reader is ensured, and the stability and reliability of the system are improved. By combining the components, the system stability, high efficiency and wide range of the reading and identifying device are improved.
Drawings
FIG. 1 is a schematic diagram of the overall principle of the embodiment of the present invention;
fig. 2 is a schematic structural diagram of a connection principle between an operational amplifier circuit and an antenna tuning network module according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the principle structure of the card reading main control module of the present invention;
FIG. 4 is a schematic diagram of the RF amplifying circuit of the present invention;
FIG. 5 is a schematic diagram of the connection and principle structure of the low-pass filter circuit, the RF detection circuit and the directional coupling circuit of the present invention;
FIG. 6 is a schematic diagram of the principle structure of the antenna tuning network module of the present invention;
FIG. 7 is a schematic diagram of the principle structure of the tuning circuit of the present invention;
fig. 8 is a schematic structural diagram of the connection module 1 of the present invention;
fig. 9 is a schematic structural diagram of the connection module 2 according to the present invention;
fig. 10 is a schematic diagram of a digital-to-analog signal converter according to the present invention.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
In the description of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be a mechanical connection; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the description of the present specification, the descriptions of the terms "embodiment," "one embodiment," and the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or embodiment is included in at least one embodiment or illustrated embodiment of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same examples or implementations. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or implementations.
As shown in fig. 1-3, embodiment 1 of the present invention provides an intelligent warehouse system for a substation intelligent construction site, which comprises a card reading module, wherein the card reading module comprises a read-write module, a card reading main control module, a card reading power module, an operational amplifier module and an antenna tuning network module; the card reading power module is respectively and electrically connected with the read-write module, the card reading main control module and the operational amplifier module, and the operational amplifier module comprises a radio frequency amplifying circuit, a low-pass filter circuit, a directional coupling circuit and a radio frequency detection circuit; the radio frequency input port of the radio frequency amplifying circuit is electrically connected with the REOUT port of the read-write module, and the radio frequency output end of the radio frequency amplifying circuit is electrically connected with the access end of the low-pass filter circuit; the directional coupler is respectively and electrically connected with the radio frequency output end of the low-pass filter circuit, the access end of the antenna tuning network module and the access end of the radio frequency detection circuit; the output end of the radio frequency detection circuit is electrically connected with the card reading main control module; the output end of the antenna tuning network module is provided with a regulating antenna module, and the regulating antenna module is provided with an antenna.
When the system is used, the read-write module, the read-card main control module, the read-card power module, the operational amplifier module and the antenna tuning network module can be packaged to serve as a read-identification device, in the scheme, as shown in fig. 4, the radio frequency amplifying circuit is a SKY65111 1753773 chip, the working frequency of 800-1100MHz is optimized, the output power is more than 33dBm (915 MHz), the system is integrated with analog power control, and the system has a microminiature structure and small current in a 10 mu A standby mode;
as shown in fig. 5, the low-pass filter circuit model LFCN-1000+ chip; the high-frequency signals can be filtered out, so that the anti-interference capability of the RFID reading and identifying device is improved;
the directional coupler is of the RCP890Q10 type and is mainly used for signal isolation, and when the directional coupler transmits signals, reflected signals of the low-pass filter circuit are prevented from entering the receiver, so that the inside of the receiver is saturated.
The radio frequency detection circuit model is MAX2206EBS+, is used for detecting the signal power of the coupling end of the directional coupler, and outputs the detection voltage which increases along with the increase of the input power of the directional coupler, the detection voltage is output to the card reading main control module, the card reading main control module converts and outputs the coupling port of the directional coupler, and realizes signal isolation, prevents the influence of the reverse signal of the card reading main control module on the directional coupler, and the card reading main control module receives the detection voltage signal for analysis, such as: the directional coupler has overhigh power and is in a saturated state, and at the moment, the output of the card reading main control module to the directional coupler port is reduced.
As shown in fig. 6, when the user uses different antennas, the antenna tuning network module can find an optimal informationized isolation level (the lowest level point received by RX is the optimal isolation position when TX transmits) by continuously adjusting the impedance of the tuning network because the impedance of the antennas is inconsistent. When the card reader with the antenna tuning network is added, the performance of the card reader is not affected because the working frequency points of the antennas are inconsistent. The dynamic tuning network can match the antenna to the optimal state, so that the performance of the card reader is ensured, and the stability and reliability of the system are improved.
The output end of the radio frequency detection circuit is connected with a sixth pin (RFIN) of the card reading main control module, and the card reading main control module receives an output signal of the radio frequency detection circuit.
In embodiment 2, the rf output end of the rf amplifying circuit is electrically connected to one end of the first inductor, the other end of the first inductor is electrically connected to one end of the first capacitor, and the other end of the first capacitor is electrically connected to the access end of the low-pass filter circuit.
It should be noted that: when the radio frequency amplifying circuit U9 outputs a radio frequency signal, the radio frequency amplifying circuit U9 is connected to the low-pass filter circuit, so that the phenomenon of instability and high frequency of the signal is caused, and a first auxiliary circuit for solving the phenomenon of instability and high frequency of the signal is needed to be added between the radio frequency amplifying circuit and the low-pass filter circuit; the first auxiliary circuit comprises a first auxiliary filter circuit and a first auxiliary isolation prevention circuit; the first auxiliary filter circuit and the second auxiliary isolation circuit are connected in series.
The first auxiliary filter circuit comprises a first inductor and a first auxiliary capacitor; the radio frequency output end (pins 9, 10, 11 and 12) of the radio frequency amplifying circuit U9 is electrically connected with one end of a first inductor L10, and the other end of the first inductor L10 is electrically connected with a first auxiliary isolation preventing circuit; one end of the first auxiliary capacitor is electrically connected with the radio frequency output end of the radio frequency amplifying circuit U9, and the other end of the first auxiliary capacitor is grounded; firstly, the amplified signals of the radio frequency amplifying circuit are grounded through the first auxiliary capacitor, and the signals which do not meet the requirements can be filtered to the greatest extent, so that the workload of the rear components is reduced, the power of the corresponding rear components can be reduced to the greatest extent, the price of the components is reduced, the operation efficiency is improved, most of the signals are filtered, and then filtered through the first inductor L10 again, and the high-frequency signals are removed.
The first auxiliary isolation prevention circuit is a first capacitor C68, one end of the first capacitor C68 is electrically connected with the other end of the first inductor L10, the other end of the first inductor L10 is electrically connected with the access end 1 of the low-pass filter circuit T1, the first capacitor is a coupling capacitor, and the two-pole circuit is prevented from being isolated, so that signals are stable, and signals accessed by the low-pass filter circuit T1 are stable.
Embodiment 3, the directional coupler T2, which is the type RCP890Q10, is mainly used for signal isolation, and prevents reflected signals from entering the receiver when transmitting signals, resulting in saturation of the LNA inside the receiver;
the first pin of the directional coupler T2 is electrically connected with the output end of the low-pass filter circuit through the second capacitor C66, and the signal sent by the low-pass filter can be completely received by the directional coupler through the second capacitor C66, so that signal loss is reduced.
The second pin (TX transmitting end) of the directional coupler T2 is electrically connected to the antenna tuning network module, and transmits the output signal of the directional coupler to the antenna tuning network module, which performs according to the signal content.
The third pin (coupling end) of the directional coupler T2 is electrically connected with the radio frequency signal input end of the radio frequency detector through a filtering voltage dividing circuit, and the excessive power of the transmitted signal of the directional coupler is prevented through the filtering voltage dividing circuit, so that the radio frequency detector can accurately detect the signal of the directional coupler.
The fourth pin (isolation end) of the directional coupler T2 is electrically connected with the RX receiving end of the read-write module, the separated data in the directional coupler is transmitted to the read-write module, the read-write module compiles the isolation information and transmits the isolation information to the connection module, and the connection module controls the antenna tuning network module, so that the network in the antenna tuning network module is changed, and an optimal signal isolation point is found.
In embodiment 4, the coupling end of the directional coupling circuit is electrically connected with the input end of the filtering voltage dividing circuit, and the output end of the filtering voltage dividing circuit is electrically connected with the radio frequency signal input interface of the radio frequency detector.
What is required is: in order to prevent the directional coupler from outputting excessive signals to the radio frequency detector and exceeding the frequency and signal saturation of the radio frequency detector, the radio frequency detector is in downtime or bad condition, so that the output signal quantity and frequency of the radio frequency detector need to be controlled, and therefore a filtering voltage dividing circuit is arranged at the coupling end of the directional coupler and the radio frequency signal input interface of the radio frequency detector, and the working stability of the radio frequency detector is achieved.
In embodiment 5, as shown in fig. 6 and 7, the antenna tuning network module is provided with a coordination unit and a connection module, the access end of the coordination unit is electrically connected with the transmitting end of the directional coupler, the output end of the coordination unit is electrically connected with the access end of the regulation antenna module, and the connection module is electrically connected with the pin in the coordination unit.
The coordination units are three groups, each group of coordination units are connected in series, the access end of the first coordination unit is electrically connected with the transmitting end of the directional coupler, and the output end of the third coordination unit is connected with the input end of the regulation and control antenna module.
Each group of coordination units comprises four tuning circuits, and each tuning circuit is connected in series; the tuning circuit comprises first change-over switches, and the input ends of the common terminals of the four first change-over switches are connected in series; the output end of the normally open terminal of the first change-over switch is electrically connected with one end of the second inductor, and the two ends of the second inductor are grounded; the normally closed terminal of the first change-over switch is electrically connected with one end of the third inductor, and the two ends of the third inductor are grounded; the input end of the normally open terminal and the input end of the normally closed terminal are respectively connected with the corresponding pins of the connecting module.
The regulation antenna module comprises a second change-over switch, a first antenna socket and a second antenna socket; the output end of the normally open terminal of the second change-over switch is electrically connected with one end of a fourth capacitor, and the other end of the fourth capacitor is electrically connected with the first antenna socket; the output end of the normally closed terminal of the second change-over switch is electrically connected with one end of a fifth capacitor, and the other end of the fifth capacitor is electrically connected with the second antenna socket; the common terminal of the second change-over switch is connected with one end of a sixth capacitor, and two ends of the sixth capacitor are connected with the three groups of coordination units in a collinear manner; the input end of the normally open terminal in the second change-over switch and the input end of the normally closed terminal in the second change-over switch are respectively connected with the corresponding ports of the card reading main control module.
It should be noted that: in this embodiment 5, the antenna tuning network module is an important component of the present invention, and the card reading module controls the first control switch in the tuning circuit, so as to control the inductance of the access circuit, and further change the tuning network, and when a user uses different antennas, the first control switch and the second control switch tune the impedance in the antenna tuning network module, so as to change the network, and adapt to different requirements.
The antenna tuning network module can realize local adjustment and fine adjustment; the inductance of any one or more tuning circuits is simultaneously switched on or off, so that the working frequency point of the network-switched-on area is determined, and the same class can be scanned; for example: the articles to be delivered are cables, the cables in the same category have 4 medium-sized types, and if the cables in the same category in the warehouse have only 4 medium-sized types, the cables in the same category can be rapidly identified through the card reader by keeping the second group of coordination units in a full-open state and the other group of coordination units in a full-cut-off state.
If the article to be delivered is a plurality of types of cables and each type of cable has a plurality of types, the coordination of the plurality of groups of adjustment coordination units is needed, so that the identification can be performed quickly.
The above examples merely illustrate the scalability of the network and are not limited thereto; for example: the first group of coordination units cooperates with the third group of coordination units to be fully on or fully off or partially off, for example: the third group cooperates with a fourth group of coordination units, and so on.
In order to better improve the stability and reliability of the card reading module, antenna sockets with different frequencies are required to be arranged at the output end of each tuning unit so as to receive and transmit signals with corresponding frequencies; only two antenna sockets are provided in this example, but not limited thereto.
The connection module receives the information sent by the read-write module, so as to control the state of the first change-over switch in each tuning circuit; for example: the common terminal in the first change-over switch is connected with the normally closed terminal or the normally open terminal, thereby achieving the output signal of the tuning circuit.
As shown in fig. 8 and 9, the connection module includes a connector 1 and a connector 2, and the IO terminals of the connector 1 and the connector 2 are electrically connected with the normally open terminal and the normally closed terminal of the corresponding tuning circuit, respectively; the output ends of the connector 1 and the connector 2 are respectively connected with the SDA pin of the card reading main control module, and the input ends of the connector 1 and the connector 2 are respectively electrically connected with the INT1 terminal and the TNT2 terminal of the card reading main control module.
As shown in fig. 10, the card reading module further includes a digital-to-analog signal conversion circuit, an input end of the digital-to-analog signal conversion circuit is connected to an output end of the power control voltage of the radio frequency amplifying circuit, and an output end of the digital-to-analog signal conversion circuit is electrically connected to the card reading main control module.
The intelligent warehouse system for the intelligent building site of the transformer substation is further provided with a main control chip, an audio chip and a network module, wherein the card reading module, the audio chip and the network module are connected with the main control chip, so that a warehouse system is formed, objects are identified through the card reading module and sent to the main control chip, the main control chip performs sound playing according to received information and processing sent to the audio chip, and the main control chip can send the information of the received main control chip to a corresponding client or other terminals through the network module.
The invention mainly solves the problems that the operational amplifier module in the card reading module is used for identifying objects, the working efficiency is improved by 45%, the read-write distance is 10M, the problem of low unrecognizable rate and the limitation of identification distance are solved, the antenna tuning network module is used for adjusting the inductance of the tuning circuit to be connected, so that a dynamic tuning network is formed, the dynamic tuning network can realize the receiving of different frequency bands, the performance of a card reader is ensured, and the stability and the reliability of card reading are improved.
Although the present disclosure is described above, the scope of protection of the present disclosure is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the scope of the invention.
Claims (6)
1. The intelligent warehouse system for the intelligent construction site of the transformer substation is characterized by comprising a card reading module, wherein the card reading module comprises a read-write module, a card reading main control module, a card reading power module, an operational amplifier module and an antenna tuning network module; the card reading power module is respectively and electrically connected with the read-write module, the card reading main control module and the operational amplifier module, and the operational amplifier module comprises a radio frequency amplifying circuit, a low-pass filter circuit, a directional coupling circuit and a radio frequency detection circuit; the radio frequency input port of the radio frequency amplifying circuit is electrically connected with the REOUT port of the read-write module, and the radio frequency output end of the radio frequency amplifying circuit is electrically connected with the access end of the low-pass filter circuit; the directional coupler is respectively and electrically connected with the radio frequency output end of the low-pass filter circuit, the access end of the antenna tuning network module and the access end of the radio frequency detection circuit; the output end of the radio frequency detection circuit is electrically connected with the card reading main control module; the output end of the antenna tuning network module is provided with a regulating antenna module, and the regulating antenna module is provided with an antenna;
the antenna tuning network module is provided with a coordination unit and a connection module, the access end of the coordination unit is electrically connected with the transmitting end of the directional coupler, the output end of the coordination unit is electrically connected with the access end of the regulation antenna module, and the connection module is electrically connected with pins in the coordination unit;
the coordination units are in three groups, each group of coordination units are connected in series, the access end of the first coordination unit is electrically connected with the transmitting end of the directional coupler, and the output end of the third coordination unit is connected with the input end of the regulation and control antenna module;
each group of coordination units comprises four tuning circuits, and each tuning circuit is connected in series; the tuning circuit comprises first change-over switches, and the input ends of the common terminals of the four first change-over switches are connected in series; the output end of the normally open terminal of the first change-over switch is electrically connected with one end of the second inductor, and the two ends of the second inductor are grounded; the normally closed terminal of the first change-over switch is electrically connected with one end of the third inductor, and the two ends of the third inductor are grounded; the input end of the normally open terminal and the input end of the normally closed terminal are respectively connected with corresponding pins of the connecting module;
the regulation antenna module comprises a second change-over switch, a first antenna socket and a second antenna socket; the output end of the normally open terminal of the second change-over switch is electrically connected with one end of a fourth capacitor, and the other end of the fourth capacitor is electrically connected with the first antenna socket; the output end of the normally closed terminal of the second change-over switch is electrically connected with one end of a fifth capacitor, and the other end of the fifth capacitor is electrically connected with the second antenna socket; the common terminal of the second change-over switch is connected with one end of a sixth capacitor, and two ends of the sixth capacitor are connected with the three groups of coordination units in a collinear manner; the input end of the normally open terminal in the second change-over switch and the input end of the normally closed terminal in the second change-over switch are respectively connected with the corresponding ports of the card reading main control module.
2. The intelligent warehouse system of the transformer substation intelligent construction site according to claim 1, wherein the radio frequency output end of the radio frequency amplifying circuit is electrically connected with one end of the first inductor, the other end of the first inductor is electrically connected with one end of the first capacitor, and the other end of the first capacitor is electrically connected with the access end of the low-pass filter circuit.
3. The intelligent warehouse system of the intelligent construction site for the transformer substation according to claim 1, wherein the output end of the low-pass filter circuit is electrically connected with one end of the second capacitor, and the other end of the second capacitor is electrically connected with the directional coupler.
4. The intelligent warehouse system of the transformer substation intelligent construction site according to claim 1, wherein the coupling end of the directional coupling circuit is electrically connected with the input end of the filtering voltage dividing circuit, the output end of the filtering voltage dividing circuit is electrically connected with the radio frequency signal input interface of the radio frequency detector, the power pin of the radio frequency detector is electrically connected with the power supply, the radio frequency signal output end of the radio frequency detector is electrically connected with the card reading main control module, and the grounding port of the radio frequency detector is grounded.
5. The smart warehouse system of claim 2, wherein the input end of the directional coupler is electrically connected to the other end of the second capacitor, the isolation end of the directional coupler is electrically connected to the receiving end of the read-write module, and the transmitting end of the directional coupler is electrically connected to the antenna tuning network module.
6. The intelligent warehouse system of the transformer substation intelligent construction site according to claim 1, wherein the card reading module further comprises a digital-to-analog signal conversion circuit, an input end of the digital-to-analog signal conversion circuit is connected with an output end of the power control voltage of the radio frequency amplifying circuit, and an output end of the digital-to-analog signal conversion circuit is electrically connected with the card reading main control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211296234.6A CN115796200B (en) | 2022-10-21 | 2022-10-21 | Be used for wisdom building site wisdom warehouse system of transformer substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211296234.6A CN115796200B (en) | 2022-10-21 | 2022-10-21 | Be used for wisdom building site wisdom warehouse system of transformer substation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115796200A CN115796200A (en) | 2023-03-14 |
| CN115796200B true CN115796200B (en) | 2024-01-19 |
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| CN202211296234.6A Active CN115796200B (en) | 2022-10-21 | 2022-10-21 | Be used for wisdom building site wisdom warehouse system of transformer substation |
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| US6903656B1 (en) * | 2003-05-27 | 2005-06-07 | Applied Wireless Identifications Group, Inc. | RFID reader with multiple antenna selection and automated antenna matching |
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| CN112332093A (en) * | 2020-10-26 | 2021-02-05 | Tcl通讯（宁波）有限公司 | Antenna tuning device and mobile terminal |
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| CN115796200A (en) | 2023-03-14 |
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