CN215493812U - Three-phase smart electric meter and battery voltage detection device thereof - Google Patents
Three-phase smart electric meter and battery voltage detection device thereof Download PDFInfo
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- CN215493812U CN215493812U CN202122261068.3U CN202122261068U CN215493812U CN 215493812 U CN215493812 U CN 215493812U CN 202122261068 U CN202122261068 U CN 202122261068U CN 215493812 U CN215493812 U CN 215493812U
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Abstract
The utility model discloses a three-phase intelligent electric meter and a battery voltage detection device thereof, which aim to solve the problem that the real-time performance of battery voltage detection is greatly reduced by the current method for waking up an ADC (analog to digital converter) at intervals to detect the battery voltage. The device includes: the circuit comprises a first resistor, a second resistor and a comparator; the first end of the first resistor is connected with the positive pole of the battery, the second end of the first resistor is connected with the first end of the second resistor, the second end of the second resistor is connected with the negative pole of the battery, the second end of the first resistor is connected with the input end of the comparator, the output end of the comparator is connected with the controller, and when the voltage input into the comparator is larger than the standard voltage value, the comparator sends a signal to the controller. Because the power consumption of the comparator is less than 0.1 microampere and is far less than the power consumption of about 200 microamperes of the ADC, the power consumption of the comparator can always keep an on state to detect the battery voltage in real time, and the problem that the real-time property of the battery voltage is insufficient when the ADC is awakened at regular time at present is solved.
Description
Technical Field
The utility model relates to the field of intelligent electric meters, in particular to a three-phase intelligent electric meter and a battery voltage detection device thereof.
Background
In the national power grid electric energy meter technical standard, the electric energy meter is required to continuously work for more than five years by using a built-in battery when no power supply of an external power grid is input, and the undervoltage state of the built-in battery can be detected no matter whether the external power grid is electrified or not.
At present, when an external power grid is powered off, the method for waking up the ADC at intervals to detect the battery voltage is high in power consumption of the ADC, only the method for lengthening the timing wake-up intervals can be adopted to reduce the power consumption, the current intervals are about 10 seconds, and the real-time performance of battery voltage detection is greatly reduced.
Therefore, those skilled in the art need a battery voltage detection device to solve the problem that the battery voltage detection is not timely enough after the external power grid is powered off.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a three-phase intelligent ammeter and a battery voltage detection device thereof, and aims to solve the problem that battery voltage detection is not timely enough after an external power grid is powered off.
In order to solve the above technical problem, the present invention provides a battery voltage detection apparatus comprising: a first resistor, a second resistor, a comparator 2; the first end of the first resistor is connected with the positive pole of the battery, the second end of the first resistor is connected with the first end of the second resistor, the second end of the second resistor is connected with the negative pole of the battery, the second end of the first resistor is connected with the input end of the comparator 2, the output end of the comparator 2 is connected with the controller 1, and when the voltage input into the comparator 2 is larger than the standard voltage value, the comparator 2 sends a signal to the controller 1.
Preferably, the method further comprises the following steps: an ADC 3; the positive electrode of the battery is connected with the input end of the ADC3, the output end of the ADC3 is connected with the power supply end of the controller 1, and the power supply end of the ADC3 is connected with an external power grid.
Preferably, the method further comprises the following steps: and a filter circuit arranged at the input of the comparator 2.
Preferably, the method further comprises the following steps: a filter circuit disposed at the input of the ADC 3.
Preferably, the filter circuit includes a first filter capacitor; the first end of the first filter capacitor is connected with the input end of the comparator 2, and the second end of the first filter capacitor is grounded.
Preferably, the filter circuit includes a second filter capacitor; the first end of the second filter capacitor is connected with the input end of the ADC3, and the second end of the second filter capacitor is grounded.
In order to solve the above problems, the present invention further provides a three-phase smart meter, which includes a controller 1, a battery, and a battery voltage detection device.
Preferably, the controller 1 is a V8530P single chip microcomputer.
Preferably, the controller 1 further comprises a prompting device 4, and when the controller detects that the battery voltage is insufficient, the prompting device 4 is sent with a signal to display prompting information by the prompting device 4.
Preferably, the prompting device 4 is a liquid crystal screen.
The battery voltage detection device provided by the utility model divides the battery voltage by using the divider resistor, and then compares the relation between the divided voltage and the standard voltage value by using the comparator, when the divided voltage is smaller than the standard voltage value, the comparator sends a signal to the controller, the controller can prompt a user that the battery voltage is insufficient according to the signal, because the power consumption of the comparator is less than 0.1 microampere, the power consumption of the ADC which is usually used for regularly detecting the battery voltage at present is about 200 microampere, the interval time is mostly 10 seconds, the power consumption of the comparator is far smaller than that of the ADC, the battery voltage can be always kept in an open state for real-time detection, and the problem that the real-time property of awakening the ADC to detect the battery voltage is insufficient at present is solved.
In order to solve the technical problem, the utility model also provides a three-phase intelligent electric meter which comprises the battery voltage detection device, and the effect is the same as that of the battery voltage detection device.
Drawings
In order to illustrate the embodiments of the present invention more clearly, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained by those skilled in the art without inventive effort.
Fig. 1 is a structural diagram of a battery voltage detection apparatus according to the present invention;
fig. 2 is a structural diagram of a three-phase smart meter according to the present invention.
The reference numbers are as follows: 1 is a controller, 2 is a comparator, 3 is an ADC, and 4 is a prompting device.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative work belong to the protection scope of the present invention.
The core of the utility model is to provide a three-phase intelligent electric meter and a battery voltage detection device thereof.
In order that those skilled in the art will better understand the disclosure, the utility model will be described in further detail with reference to the accompanying drawings and specific embodiments.
No matter be domestic power consumption or industrial power consumption, all need use the ammeter to monitor the power consumption, and the outside electric wire netting is not electrified at the moment, breaks down when the circuit, or the power is initiatively cut off to the power plant again, all can make smart electric meter lose the access of external power source. At the moment, the electric meter can only rely on the built-in battery to maintain work, and in the national grid electric energy meter technical standard, the electric energy meter is required to use the built-in battery to continuously work for more than five years when no power supply of an external power grid is input, and whether the external power grid is electrified or not, the undervoltage state of the built-in battery needs to be detected. At present, a method for detecting the battery voltage by using the ADC3 is generally adopted, but since the power consumption of the ADC3 is high, about 200 microamperes, and the battery can still continuously operate for more than five years when the external power grid is powered off, the battery voltage cannot be detected in real time, but a method for waking up the ADC3 at intervals for detection is adopted, and the interval time is generally 10 seconds. Thus, the real-time performance of battery voltage detection is greatly reduced. In order to solve this problem, the present application provides a battery voltage detection apparatus, as shown in fig. 1, including: a first resistor R1, a second resistor R2 and a comparator 2; the first end of the first resistor R1 is connected with the positive pole of the battery, the second end of the first resistor R1 is connected with the first end of the second resistor R2, the second end of the second resistor R2 is connected with the negative pole of the battery, the second end of the first resistor R1 is connected with the input end of the comparator 2, the output end of the comparator 2 is connected with the controller 1, and when the voltage input into the comparator 2 is smaller than the standard voltage value, the comparator 2 sends a signal to the controller 1.
Because the power consumption of the comparator 2 is lower and less than 0.1 microampere, and can be ignored compared with the power consumption of about 200 microamperes of the ADC3, the on state can be kept for detection all the time, and the real-time performance of battery voltage detection is greatly improved.
As can be seen from the above description, although the power consumption of the ADC3 is much larger than that of the comparator 2, the ADC3 can obtain the specific condition of the battery voltage, and when the external power grid is powered on, the smart meter can obtain the power from the external power grid, and at this time, the power consumption of the ADC3 is negligible compared with that of the external power grid, so as to perform detection all the time, so on the basis of the foregoing embodiment, as shown in fig. 1, the present embodiment further includes: an ADC 3; the positive pole of the battery is connected with the input end of the ADC3, the output end of the ADC3 is connected with the controller 1, and the power supply of the ADC3 is generated by an external power grid.
When the external power grid is powered on, the ADC3 is powered on, the battery voltage state can be detected in real time, specific parameters are obtained and sent to the controller 1, and when the external power grid is powered off, the ADC3 is powered off similarly, the battery voltage is not detected, but is detected by the comparator 2 mentioned in the embodiment, so that the electric energy is saved.
The advantages of this embodiment over the above embodiments are: the ADC3 is powered by an external power grid, when the external power grid is powered on, the ADC3 is powered on to detect the battery voltage, the controller 1 can obtain the specific voltage condition of the battery, and when the external power grid is powered off, the comparator 2 of the above embodiment is still used to detect the battery voltage, so as to reduce power consumption.
In practical use, due to the interference of an external complex electromagnetic environment, the detected voltage may fluctuate instantaneously, so as to affect the accuracy of the detection result, and in order to reduce the influence of the voltage fluctuation on the detection result, as shown in fig. 1, the embodiment provides a preferred scheme: the input end of the comparator 2 is provided with a filter circuit.
It should be noted that, the present embodiment does not limit the specific implementation of the filter circuit, but provides a preferred implementation as follows: the filter circuit comprises a first filter capacitor C1; the first end of the first filter capacitor C1 is connected to the input terminal of the comparator 2, and the second end of the first filter capacitor C1 is grounded.
Also, another preferred scheme is: the input end of the ADC3 is provided with a filter circuit; one preferred embodiment is as follows: a second filter capacitor C2; the first end of the second filter capacitor C2 is connected to the input terminal of the ADC3, and the second end of the second filter capacitor C2 is grounded.
The advantages of this embodiment over the above embodiments are: the filter circuit has the anti-interference effect, the influence on the detection result caused by the fluctuation of the detected voltage is avoided, and the detection accuracy is further improved. Meanwhile, a filter capacitor is selected to form the filter circuit, and the filter circuit is simple in structure, easy to implement and low in cost.
The present application further provides a three-phase smart electric meter, as shown in fig. 2, including the battery voltage detection device mentioned in the above embodiment, it is easy to know that, in this embodiment, besides the controller 1 and the battery, the three-phase smart electric meter also includes all basic functions and modules of the three-phase smart electric meter, including but not limited to a display module, an infrared communication module, an RS485 communication module, a carrier communication module, a storage module, a security authentication module, a metering module, and a load switch module. These are well known in the art, and the battery voltage detection apparatus has the same effects as those described above, and the details of this embodiment are not repeated herein.
As can be seen from the above, the above embodiment does not limit the controller 1, different controllers 1 have different advantages and disadvantages, and in practical use, an appropriate controller 1 should be selected according to practical requirements, as shown in fig. 2, this embodiment provides a preferred solution: controller 1 is a V8530P chip.
Since the ADC3 is built in the battery power supply terminal of the V8530P chip, it can be seen from the above embodiments that the ADC3 does not need to be additionally provided, and the battery voltage can be detected by connecting the positive electrode of the battery to the battery power supply terminal of the V8530P chip. In addition, the V8530P chip also has the comparator 2, so the comparator 2 in the above embodiment does not need to be added additionally, and a preferable embodiment is to connect the common connection point of the first resistor R1 and the second resistor R2 to the 8 th pin of the V8530P chip.
The advantages of this embodiment over the above embodiments are: the V8530P chip embeds the ADC3 and the comparator 2, so that the ADC3 and the comparator 2 do not need to be additionally added when the battery voltage detection device mentioned in the embodiment is realized, the cost is saved, and the circuit is simplified.
When the controller 1 detects that the battery voltage is insufficient, it needs to be known to the operator in time, but it is easy to know that the above embodiment does not limit how the operator can know the battery voltage status, so as shown in fig. 2, the embodiment provides a preferable solution: the battery voltage monitoring device further comprises a prompting device 4, wherein when the controller 1 detects that the battery voltage is insufficient, a signal is sent to the prompting device 4 so that the prompting device 4 can display prompting information.
When the ADC3 or the comparator 2 detects that the battery voltage is insufficient, a signal is sent to the controller 1, the controller 1 sends a signal to the prompting device 4 after receiving the signal, and the prompting device 4 displays a prompting message to prompt an operator after receiving the signal. However, it is easy to understand that the embodiment of the prompting device 4 is not limited, the prompting device 4 may be an original device of a three-phase smart meter, or may be additionally added, and specifically may be an indicator light, a buzzer, a liquid crystal display or an eccentric motor, which respectively prompt an operator through an optical signal, a sound signal and vibration, and meanwhile, the prompting device 4 may also be a combination of the above specific embodiments. But one preferred solution is: the prompting device 4 is a liquid crystal display.
The color and the type of the liquid crystal screen are not limited in the embodiment, and the proper liquid crystal screen is selected according to actual needs. It is easy to understand that, because the three-phase smart electric meter originally has the liquid crystal display, in order to avoid adding additional devices, a preferred scheme is that the prompting device 4 is the original liquid crystal display of the three-phase smart electric meter, and the liquid crystal display prompts the battery voltage state of the operator by characters or images.
The advantages of this embodiment over the above embodiments are: be provided with suggestion device 4 and make things convenient for operating personnel in time to learn battery voltage state, simultaneously, select the LCD screen as suggestion device 4 simple structure, low cost, the consumption is also low, satisfies the low-power consumption requirement to three-phase smart electric meter when the power down of outside electric wire netting.
The three-phase intelligent electric meter and the battery voltage detection device thereof provided by the utility model are described in detail above. The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (10)
1. The battery voltage detection device is characterized by comprising a first resistor, a second resistor and a comparator (2); the first end of first resistance is connected with the positive pole of battery, the second end of first resistance with the first end of second resistance is connected, the second end of second resistance with the negative pole of battery is connected, the second end of first resistance with the input of comparator (2) is connected, the output and the controller (1) of comparator (2) are connected, and when the input the voltage of comparator (2) is greater than standard voltage value, comparator (2) to controller (1) send signal.
2. The battery voltage detection apparatus according to claim 1, further comprising: an ADC (3); the battery anode is connected with the input end of the ADC (3), the output end of the ADC (3) is connected with the power supply end of the controller (1), and the power supply end of the ADC (3) is connected with an external power grid.
3. The battery voltage detection apparatus according to claim 1, further comprising: and the filter circuit is arranged at the input end of the comparator (2).
4. The battery voltage detection apparatus according to claim 2, further comprising: and the filter circuit is arranged at the input end of the ADC (3).
5. The battery voltage detection apparatus according to claim 3, wherein the filter circuit includes a first filter capacitor; the first end of the first filter capacitor is connected with the input end of the comparator (2), and the second end of the first filter capacitor is grounded.
6. The battery voltage detection apparatus according to claim 4, wherein the filter circuit includes a second filter capacitor; and the first end of the second filter capacitor is connected with the input end of the ADC (3), and the second end of the second filter capacitor is grounded.
7. A three-phase smart meter comprising a controller (1), a battery, and a battery voltage detection device according to any one of claims 1 to 6.
8. The three-phase smart meter of claim 7, characterized in that the controller (1) is a V8530P single chip microcomputer.
9. The three-phase smart meter of claim 7, further comprising a prompting device (4) for sending a signal to the prompting device (4) to display a prompting message by the prompting device (4) when the controller (1) detects that the battery voltage is insufficient.
10. A three-phase smart meter according to claim 9, characterized in that said prompting device (4) is a liquid crystal screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122261068.3U CN215493812U (en) | 2021-09-17 | 2021-09-17 | Three-phase smart electric meter and battery voltage detection device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122261068.3U CN215493812U (en) | 2021-09-17 | 2021-09-17 | Three-phase smart electric meter and battery voltage detection device thereof |
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| Publication Number | Publication Date |
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| CN215493812U true CN215493812U (en) | 2022-01-11 |
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| CN202122261068.3U Active CN215493812U (en) | 2021-09-17 | 2021-09-17 | Three-phase smart electric meter and battery voltage detection device thereof |
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- 2021-09-17 CN CN202122261068.3U patent/CN215493812U/en active Active
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