CN212568939U - Ammeter capable of automatically switching internal and external antennas - Google Patents
Ammeter capable of automatically switching internal and external antennas Download PDFInfo
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- CN212568939U CN212568939U CN201922006364.1U CN201922006364U CN212568939U CN 212568939 U CN212568939 U CN 212568939U CN 201922006364 U CN201922006364 U CN 201922006364U CN 212568939 U CN212568939 U CN 212568939U
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Abstract
The utility model relates to an ammeter capable of automatically switching internal and external antennas, which comprises an internal antenna module (1), an external antenna module (2), a communication module (3), a processing module (4), a gating switch (5) and a detection module (6), wherein the internal antenna module (1) and the external antenna module (2) are respectively connected with the communication module (3) through the gating switch (5), and the output end of the processing module (4) is connected with the gating switch (5); the detection module (6) is connected between the external antenna module (2) and the processing module (4) to detect a direct current voltage value between the external antenna module (2) and the gating switch (5), and the processing module (4) controls the gating switch (5) to be connected with the internal antenna module (1) or the external antenna module (2) according to the direct current voltage value transmitted by the detection module (6). The electric meter improves the data transmission efficiency.
Description
Technical Field
The utility model relates to an ammeter field especially relates to an ammeter that can carry out built-in antenna automatic switch-over.
Background
In order to perform information interaction with the outside, the electric meter includes an antenna, and most of the electric meters include an internal antenna or an external antenna. The built-in antenna is characterized in that the antenna is arranged in the ammeter, and no part extends out of the shell; the external antenna is characterized in that a coaxial connecting wire is arranged on the ammeter, and the antenna is installed outside the meter shell.
The built-in antenna ammeter has high installation efficiency because the installation position of the antenna does not need to be considered, but when the installation environment is severe, wireless signals can be greatly weakened, and the success rate of remote reading is influenced; the external antenna electric meter has strong adaptability, the wireless signal strength is guaranteed, but the installation position of the antenna needs to be considered during field installation.
In order to solve the above problems, designers have developed an electric meter that is compatible with an internal antenna and an external antenna, but this leads to a problem that the compatible electric meter cannot be automatically switched between the internal antenna and the external antenna, and the electric meter needs to be manually disassembled for manual configuration, and many times, customers do not allow the meter to be disassembled on site, which causes unnecessary troubles.
SUMMERY OF THE UTILITY MODEL
In view of the above problem, an object of the present invention is to provide an electric meter which can automatically switch between the internal antenna function and the external antenna function, thereby improving the wireless information transmission efficiency of the electric meter and reducing the manual operation trouble.
In order to realize the purpose, the technical scheme of the utility model is that: the utility model provides an ammeter that can carry out interior built-in antenna automatic switch-over, includes built-in antenna module, external antenna module, communication module and processing module, its characterized in that:
the antenna comprises an internal antenna module, an external antenna module and a processing module, wherein the internal antenna module and the external antenna module are respectively connected with the communication module through the gating switch;
the detection module is connected between the external antenna module and the processing module to detect a direct current voltage value between the external antenna module and the gating switch, and the processing module controls the gating switch to be connected with the internal antenna module or the external antenna module according to the direct current voltage value transmitted by the detection module.
Furthermore, the detection module comprises a direct current voltage source and an AD sampling module, one end of the AD sampling module is connected between the external antenna module and the gating switch, the other end of the AD sampling module is connected with the processing module, and the collected direct current voltage value between the external antenna module and the gating switch is transmitted to the processing module.
Furthermore, the external antenna module comprises an external antenna and a first resistor, one end of the first resistor is connected with the external antenna, and the other end of the first resistor is grounded.
Further, the gating switch is a radio frequency switch.
Furthermore, the AD sampling module comprises a second resistor, one end of the second resistor is connected with a direct current voltage source, the other end of the second resistor is electrically connected with the one end of the first resistor, and the AD sampling module collects a direct current voltage value between the first resistor and the second resistor.
Furthermore, the AD sampling module also comprises a first isolation module for isolating alternating current RF signals generated by the external antenna module, one end of the first isolation module is connected between the external antenna and the first resistor, and the other end of the first isolation module is connected with the other end of the second resistor.
Furthermore, the AD sampling module also comprises a second isolation module for isolating the alternating current signal, one end of the second isolation module is connected with the other end of the second resistor, and the other end of the second isolation module is connected with the input end of the processing module.
Further, the first isolation module is an inductor L.
Further, the second isolation module is an RC low-pass filter.
Furthermore, the RC low-pass filter includes a third resistor and a first capacitor, one end of the third resistor is connected to the other end of the second resistor, and the other end of the third resistor is connected to the input end of the processing module, and one end of the first capacitor is connected between the third resistor and the input end of the processing module, and the other end of the first capacitor is grounded.
Compared with the prior art, the utility model has the advantages of: through connecting a resistance between external antenna and ground to through setting up DC voltage source and AD sampling module, detect the direct current voltage value size between external antenna module and the gating switch by AD sampling module, and give processing module with it transmission, processing module confirms whether external antenna module inserts the circuit according to this numerical value size, thereby the automatic decision ammeter adopts external antenna to carry out data transceiver or adopts built-in antenna to carry out data transceiver, this automatic switch-over function has improved the information transmission efficiency of ammeter.
Drawings
Fig. 1 is a block diagram of an electric meter capable of automatically switching between an internal antenna and an external antenna according to the present application.
Fig. 2 is a schematic circuit diagram of an electric meter capable of automatically switching between an internal antenna and an external antenna according to the present application.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
Fig. 1 to 2 show that the utility model discloses can carry out the ammeter internal structure block diagram that switches between built-in antenna function and external antenna function with the circuit schematic diagram that corresponds automatically. This ammeter includes built-in antenna module 1, external antenna module 2, communication module 3 and processing module 4, still include gating switch 5 and detection module 6, built-in antenna module 1 and external antenna module 2 link to each other with communication module 3 through gating switch 5 respectively, processing module 4 output links to each other with gating switch 5, and detection module 6 is then connected between external antenna module 2 and processing module 4, be used for detecting the direct current voltage value between external antenna module 2 and gating switch 5, and transmit the direct current voltage value that should detect for processing module 4, processing module 4 then judges according to this numerical value size whether external antenna module 2 inserts the circuit in, then control gating switch and built-in antenna module switch-on or with external antenna module switch-on.
Specifically, in this embodiment, the detection module 6 includes a dc voltage source 61 and an AD sampling module 62, one end of the AD sampling module 62 is connected between the external antenna module 2 and the gating switch 5, and the other end is connected to the processing module 4, and transmits the collected dc voltage value between the external antenna module 2 and the gating switch 5 to the processing module 4.
In order to accurately judge whether the external antenna is connected to the circuit, the problem is ingeniously converted into the measurement of the voltage value, the external antenna is specifically corresponding to the measurement in a circuit diagram, a resistor is integrated in the external antenna, namely the external antenna module 2 comprises the external antenna 21 and a first resistor R1, one end of the first resistor R1 is connected with the external antenna 21, the other end of the first resistor R1 is grounded, the resistor R1 is installed in the external antenna, the resistance value is large, and the impedance of the antenna in the working frequency band is not affected.
Whether the external antenna is connected or not determines whether a resistor connected in parallel to the working ground exists on a gating switch for connecting the external antenna. In the present application, the gating switch 5 is a radio frequency switch, and the radio frequency switch is adopted to realize automatic switching of the internal and external antennas, that is, when the external antenna is determined not to be connected to the circuit, the electric meter system defaults to use the internal antenna, and when the external antenna is found to be connected to the circuit, the external antenna is preferably used by the system.
This AD sampling module 62 includes that one end links to each other with DC voltage source 61 and the other end and first resistance R1 the second resistance R2 that one end electricity is connected, AD sampling module can judge whether external antenna has accessed in the table through gathering the direct current voltage value between first resistance R1 and the second resistance R2, also is that the VCC of DC voltage source 61 provides a DC offset voltage through second resistance R2, if external antenna inserts, then R1 and R2 can form the partial pressure, can learn whether external antenna inserts through judging the voltage value detectable.
Specifically, when the external antenna is not installed, only the resistor R2 exists in the circuit, at this time, the value obtained by AD sampling is the value of the dc voltage source 61, that is, VCC, the processing module 4 instructs the radio frequency switch to directly connect with the internal antenna module according to the value, and after the external antenna is installed, the first resistor R1 appears in the circuit, and the value obtained by AD sampling is the value obtained by dividing the VCC by R1/R2, at this time, the processing module 4 determines that the radio frequency switch is connected with the external antenna module according to the obtained dc voltage value on the radio frequency signal line, that is, according to the voltage value between the first resistor R1 and the second resistor R2, so as to switch to preferentially use the external antenna for data exchange, thereby utilizing the advantage of the external antenna to improve the data transmission efficiency.
In this application, the AD sampling module 62 further includes a first isolation module 63 for isolating an ac RF signal generated by the external antenna module 2, one end of the first isolation module 63 is connected between the external antenna 21 and the first resistor R1, and the other end of the first isolation module is connected to the other end of the second resistor R2, specifically, the first isolation module is an inductor L, and the inductor L1 can block the RF signal, so that the RF signal is not affected by the back-end AD sampling circuit, and the dc voltage division of R1/R2 is not affected.
The AD sampling module 62 further comprises a second isolation module 64 for isolating the ac signal, wherein one end of the second isolation module 64 is connected to the other end of the second resistor R2, and the other end of the second isolation module is connected to the input terminal of the processing module 4, and specifically, the second isolation module is an RC low-pass filter, that is, the second isolation module comprises a third resistor R3 and a first capacitor C2, one end of the third resistor R3 is connected to the other end of the second resistor R2, and the other end of the third resistor R3 is connected to the input terminal of the processing module 4, and one end of the first capacitor C2 is connected between the third resistor R3 and the input terminal of the processing module 4, and.
According to the method and the device, the switching action of the radio frequency switch is controlled by the processing module, if the external antenna is judged to be installed, the external antenna is gated to work, and if the external antenna is not judged to be connected, the internal antenna is gated to work, so that the advantages of the external antenna and the advantages of the internal antenna are fully utilized, and the data transmission efficiency of the electric meter is improved.
While embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. The utility model provides an ammeter that can carry out built-in antenna automatic switch-over, includes built-in antenna module (1), external antenna module (2), communication module (3) and processing module (4), its characterized in that:
the antenna system is characterized by further comprising a gating switch (5) and a detection module (6), wherein the internal antenna module (1) and the external antenna module (2) are respectively connected with the communication module (3) through the gating switch (5), and the output end of the processing module (4) is connected with the gating switch (5);
the detection module (6) is connected between the external antenna module (2) and the processing module (4) to detect a direct current voltage value between the external antenna module (2) and the gating switch (5), and the processing module (4) controls the gating switch (5) to be connected with the internal antenna module (1) or the external antenna module (2) according to the direct current voltage value transmitted by the detection module (6).
2. An electricity meter in accordance with claim 1, wherein:
the detection module (6) comprises a direct current voltage source (61) and an AD sampling module (62), one end of the AD sampling module (62) is connected between the external antenna module (2) and the gating switch (5), the other end of the AD sampling module is connected with the processing module (4), and the collected direct current voltage value between the external antenna module (2) and the gating switch (5) is transmitted to the processing module (4).
3. An electricity meter in accordance with claim 2, wherein:
the external antenna module (2) comprises an external antenna (21) and a first resistor (R1) with one end connected with the external antenna (21) and the other end grounded.
4. An electricity meter in accordance with claim 1, wherein:
the gating switch (5) is a radio frequency switch.
5. An electricity meter in accordance with claim 3, wherein:
the AD sampling module (62) comprises a second resistor (R2) with one end connected with the direct current voltage source (61) and the other end electrically connected with one end of the first resistor (R1), and the AD sampling module (62) acquires the direct current voltage value between the first resistor (R1) and the second resistor (R2).
6. An electricity meter in accordance with claim 5, wherein:
the AD sampling module (62) further comprises a first isolation module (63) for isolating the alternating current RF signal generated by the external antenna module (2), one end of the first isolation module (63) is connected between the external antenna (21) and the first resistor (R1), and the other end of the first isolation module (63) is connected with the other end of the second resistor (R2).
7. An electricity meter in accordance with claim 5, wherein:
the AD sampling module (62) further comprises a second isolation module (64) for isolating the alternating current signal, wherein one end of the second isolation module (64) is connected with the other end of the second resistor (R2), and the other end of the second isolation module (64) is connected with the input end of the processing module (4).
8. An electricity meter in accordance with claim 6, wherein:
the first isolation module (63) is an inductor L.
9. An electricity meter in accordance with claim 7, wherein:
the second isolation module (64) is an RC low pass filter.
10. An electricity meter in accordance with claim 9, wherein:
the RC low-pass filter comprises a third resistor (R3) and a first capacitor (C2), one end of the third resistor (R3) is connected with the other end of the second resistor (R2) while the other end is connected with the input end of the processing module (4), one end of the first capacitor (C2) is connected between the third resistor (R3) and the input end of the processing module (4), and the other end is grounded.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922006364.1U CN212568939U (en) | 2019-11-19 | 2019-11-19 | Ammeter capable of automatically switching internal and external antennas |
| PCT/CN2020/089355 WO2021051825A1 (en) | 2019-09-20 | 2020-05-09 | Electrical energy meter with communication module |
| SE2250337A SE545382C2 (en) | 2019-09-20 | 2020-05-09 | Electricity meter with a communication module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922006364.1U CN212568939U (en) | 2019-11-19 | 2019-11-19 | Ammeter capable of automatically switching internal and external antennas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212568939U true CN212568939U (en) | 2021-02-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922006364.1U Active CN212568939U (en) | 2019-09-20 | 2019-11-19 | Ammeter capable of automatically switching internal and external antennas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212568939U (en) |
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2019
- 2019-11-19 CN CN201922006364.1U patent/CN212568939U/en active Active
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