CN204332053U - A kind of double antenna wireless remote installed meter - Google Patents
A kind of double antenna wireless remote installed meter Download PDFInfo
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- CN204332053U CN204332053U CN201420867886.5U CN201420867886U CN204332053U CN 204332053 U CN204332053 U CN 204332053U CN 201420867886 U CN201420867886 U CN 201420867886U CN 204332053 U CN204332053 U CN 204332053U
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Abstract
The utility model discloses a kind of double antenna wireless remote installed meter, the utility model is made up of wireless remote transmission table and the external antenna that is positioned at the inner single-chip microcomputer of described table, wireless module, HF switch, built-in aerial and is positioned at described off-balancesheet portion.Wireless module is connected by SPI communication interface with single-chip microcomputer; HF switch V1, V2 pin are connected with the common I/O mouth of single-chip microcomputer; Built-in aerial is connected with HF switch RF2 pin; HF switch GND ground connection; External antenna is connected with HF switch RF3 pin.The utility model adds and can switch by external antenna in main control on the basis of conventional single antenna remote installed meter, utilize the external antenna increased to the omni-directional of reception of wireless signals and sensitivity, the communication success ratio of remote installed meter and communication distance can be made to be strengthened.
Description
Technical field
The utility model belongs to wireless remote transmission table field, relates to a kind of single-frequency double antenna wireless radio-frequency technique and is applied to water, electricity, gas wireless remote transmission table, be specifically related to a kind of double antenna wireless remote installed meter.
Background technology
The wireless antenna scheme that existing wireless remote transmission table is on the market taked is divided into two kinds: built-in aerial and external antenna.They all have oneself shortcoming:
The defect of built-in aerial (Fig. 1): because the environment that table is installed is comparatively complicated, has very large impact to built-in aerial reception, thus cause communication distance short, the weakness such as success ratio is low of checking meter;
The defect of external antenna (Fig. 2): external antenna remote installed meter, because antenna adopts external, causes antenna to be easily damaged, thus cause exceeding standard and even cannot to check meter apart from too short;
Existing double antenna technology, all based on the scheme in different frequency situation, cannot be accomplished with frequency double antenna.
Summary of the invention
The utility model, for the deficiencies in the prior art, proposes a kind of double antenna wireless remote installed meter.
A kind of double antenna wireless remote installed meter, comprises the external antenna in single-chip microcomputer, wireless module, HF switch, built-in aerial and off-balancesheet portion; Described wireless module is connected by SPI communication interface with single-chip microcomputer; The external antenna in described single-chip microcomputer, HF switch, built-in aerial and off-balancesheet portion forms a double antenna commutation circuit.
Described double antenna commutation circuit specifically comprises single-chip microcomputer, HF switch, built-in aerial, external antenna, seven electric capacity, two resistance, two diodes; Described HF switch model is AS179-92;
4 pin of described HF switch U3 are connected with one end of one end of the first electric capacity C1, the first resistance R1,5 pin are connected with one end of the second electric capacity C2,6 pin are connected with one end of the 3rd electric capacity C3, one end of the second resistance R2,3 pin are connected with one end of the 4th electric capacity C4,2 pin ground connection, 1 pin is connected with one end of the 5th electric capacity C5, the other end of the first resistance R1, the other end of the second electric capacity C2 is connected with the common I/O mouth of single-chip microcomputer respectively with the other end of the second resistance R2, the other end of the first electric capacity C1 and the other end ground connection of the 3rd electric capacity C3, the other end of the 4th electric capacity C4 and one end of the 6th electric capacity C6, one end of inductance L 1 connects, the other end of inductance L 1 and one end of the 7th electric capacity C7, the negative electrode of the second diode D2 connects and meets built-in aerial ANT1, the other end of the 6th electric capacity C6, the other end of the 7th electric capacity C7, the anode of the second diode D2 and built-in aerial ANT1 ground connection, the other end of the 5th electric capacity C5 is connected with the negative electrode of the first diode D1 and meets external antenna ANT2, the plus earth of the first diode D1.
The single-chip microcomputer of wireless remote transmission table inside is controlled by the duty of SPI communication port to wireless module; Go to determine which root antenna is communicated with wireless module by the level of control HF switch V1, V2 pin, to realize the normal work with frequency double antenna.
The beneficial effects of the utility model: the utility model is the wireless remote transmission table with double antenna, comprise base table, governor circuit, wireless module, HF switch and interior external antenna.It is relative to existing single-antenna wireless remote installed meter, more than built-in aerial remote installed meter external antennas, built-in aerial wireless remote transmission table adaptation table tool environment for use better can be made, improve the problem that it causes built-in aerial reception not good because of environment, use newly-increased external antenna can adjust its installation site to reach better Signal reception, to improve exceed standard success ratio and farther distance; Relative to the wireless remote transmission table of existing external antenna, solve it and cause copying target problem because of external antenna is destroyed, when external antenna suffers to destroy ineffective, built-in aerial still can normally work.
Accompanying drawing explanation
Fig. 1 is built-in antenna system structural representation;
Fig. 2 is external antenna system architecture schematic diagram;
Fig. 3 is structural representation of the present utility model;
Fig. 4 is the structural representation of double antenna commutation circuit.
Embodiment
As shown in Figure 3, a kind of double antenna wireless remote installed meter, is made up of wireless remote transmission table and the external antenna that is positioned at the inner single-chip microcomputer of described table, wireless module, HF switch, built-in aerial and is positioned at described off-balancesheet portion.Wireless module is connected by SPI communication interface with single-chip microcomputer; HF switch V1, V2 pin are connected with the common I/O mouth of single-chip microcomputer; Built-in aerial is connected with HF switch RF2 pin; HF switch GND ground connection; External antenna is connected with HF switch RF3 pin.The external antenna in described single-chip microcomputer, HF switch, built-in aerial and off-balancesheet portion forms a double antenna commutation circuit.
As shown in Figure 4, described double antenna commutation circuit specifically comprises single-chip microcomputer, HF switch, built-in aerial, external antenna, seven electric capacity, two resistance, two diodes; Described HF switch model is AS179-92;
4 pin of described HF switch U3 are connected with one end of one end of the first electric capacity C1, the first resistance R1,5 pin are connected with one end of the second electric capacity C2,6 pin are connected with one end of the 3rd electric capacity C3, one end of the second resistance R2,3 pin are connected with one end of the 4th electric capacity C4,2 pin ground connection, 1 pin is connected with one end of the 5th electric capacity C5, the other end of the first resistance R1, the other end of the second electric capacity C2 is connected with the common I/O mouth of single-chip microcomputer respectively with the other end of the second resistance R2, the other end of the first electric capacity C1 and the other end ground connection of the 3rd electric capacity C3, the other end of the 4th electric capacity C4 and one end of the 6th electric capacity C6, one end of inductance L 1 connects, the other end of inductance L 1 and one end of the 7th electric capacity C7, the negative electrode of the second diode D2 connects and meets built-in aerial ANT1, the other end of the 6th electric capacity C6, the other end of the 7th electric capacity C7, the anode of the second diode D2 and built-in aerial ANT1 ground connection, the other end of the 5th electric capacity C5 is connected with the negative electrode of the first diode D1 and meets external antenna ANT2, the plus earth of the first diode D1,
The single-chip microcomputer of wireless remote transmission table inside is controlled by the duty of SPI communication port to wireless module; Go to determine which root antenna is communicated with wireless module by the level of control HF switch V1, V2 pin, to realize the normal work with frequency double antenna.
Claims (1)
1. a double antenna wireless remote installed meter, is characterized in that: the external antenna comprising single-chip microcomputer, wireless module, HF switch, built-in aerial and off-balancesheet portion; Described wireless module is connected by SPI communication interface with single-chip microcomputer; The external antenna in described single-chip microcomputer, HF switch, built-in aerial and off-balancesheet portion forms a double antenna commutation circuit;
Described double antenna commutation circuit specifically comprises single-chip microcomputer, HF switch, built-in aerial, external antenna, seven electric capacity, two resistance, two diodes; Described HF switch model is AS179-92;
4 pin of described HF switch U3 are connected with one end of one end of the first electric capacity C1, the first resistance R1,5 pin are connected with one end of the second electric capacity C2,6 pin are connected with one end of the 3rd electric capacity C3, one end of the second resistance R2,3 pin are connected with one end of the 4th electric capacity C4,2 pin ground connection, 1 pin is connected with one end of the 5th electric capacity C5, the other end of the first resistance R1, the other end of the second electric capacity C2 is connected with the common I/O mouth of single-chip microcomputer respectively with the other end of the second resistance R2, the other end of the first electric capacity C1 and the other end ground connection of the 3rd electric capacity C3, the other end of the 4th electric capacity C4 and one end of the 6th electric capacity C6, one end of inductance L 1 connects, the other end of inductance L 1 and one end of the 7th electric capacity C7, the negative electrode of the second diode D2 connects and meets built-in aerial ANT1, the other end of the 6th electric capacity C6, the other end of the 7th electric capacity C7, the anode of the second diode D2 and built-in aerial ANT1 ground connection, the other end of the 5th electric capacity C5 is connected with the negative electrode of the first diode D1 and meets external antenna ANT2, the plus earth of the first diode D1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420867886.5U CN204332053U (en) | 2014-12-30 | 2014-12-30 | A kind of double antenna wireless remote installed meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420867886.5U CN204332053U (en) | 2014-12-30 | 2014-12-30 | A kind of double antenna wireless remote installed meter |
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| Publication Number | Publication Date |
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| CN204332053U true CN204332053U (en) | 2015-05-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420867886.5U Active CN204332053U (en) | 2014-12-30 | 2014-12-30 | A kind of double antenna wireless remote installed meter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107707265A (en) * | 2017-10-26 | 2018-02-16 | 浙江威星智能仪表股份有限公司 | A kind of dual communication chip shares single antenna |
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2014
- 2014-12-30 CN CN201420867886.5U patent/CN204332053U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107707265A (en) * | 2017-10-26 | 2018-02-16 | 浙江威星智能仪表股份有限公司 | A kind of dual communication chip shares single antenna |
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