CN217639495U - Self-checking structure for electric energy meter - Google Patents
Self-checking structure for electric energy meter Download PDFInfo
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- CN217639495U CN217639495U CN202220645824.4U CN202220645824U CN217639495U CN 217639495 U CN217639495 U CN 217639495U CN 202220645824 U CN202220645824 U CN 202220645824U CN 217639495 U CN217639495 U CN 217639495U
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Abstract
The utility model discloses an electric energy meter is with verifying attachment, its technical scheme main points are including the electric energy meter body, the electric energy meter body be provided with control chip and with the measurement collection module of control chip looks adaptation, be provided with the electric quantity from the verification structure rather than the looks adaptation on the electric energy meter body, the electric quantity from the verification structure including signal output module and with signal output module mutual electric connection's voltage verification module, electric current verification module and benchmark verification module, signal output module and the mutual electric connection of control chip. The utility model discloses have rational in infrastructure, measurement accuracy height, reliable and stable, reduce the loss that the error caused to the user to and avoid the loaded down with trivial details effect of staff's on-the-spot check-up.
Description
Technical Field
The utility model relates to an electric energy meter technical field, concretely relates to electric energy meter is with from check-up structure.
Background
At present, most electric energy meters on the market adopt a computing system for sampling and analyzing current, voltage and reference voltage, but the real-time metering precision of the electric energy meter is easily reduced due to the long-time use and the deterioration of the use environment of the electric energy meter. In order to ensure relatively reliable metering accuracy of the electric energy meter, the electricity utilization users are verified at least once every half year, and the electricity utilization users are verified once every year.
In a relatively developed economic area, particularly a large electricity consumer, once the metering error of the used electric energy meter exceeds a standard value and is not checked and corrected for a long time, unnecessary troubles or losses are brought to the whole electricity selling enterprise or the user, and great difficulty is brought to the determination of a final metering result. Meanwhile, the electric energy meter of a user often needs workers to check on site, but is limited by factors such as site reasons and human factors, so that the workers can not arrive or can check on the site accurately and timely easily, and after a new meter is replaced, another independent worker needs to check on site, generally, the process needs one month at most, and therefore once the electric energy meter has problems in metering, electric quantity deviation of at least one month can be caused. In addition, the on-site check of the staff only has a short time point, the accuracy of the electric energy meter can be only within a short time, and the average check and comparison of the electric energy meter cannot be continuously carried out within a certain time, so the metering accuracy of the electric energy meter cannot be ensured.
SUMMERY OF THE UTILITY MODEL
The utility model provides a not enough to prior art exists, the utility model provides an electric energy meter is with self-checking structure has rational in infrastructure, measurement accuracy is high, reliable and stable, reduces the loss that the error caused to the user to and avoid the on-the-spot check-up loaded down with trivial details effect of staff.
In order to achieve the above purpose, the utility model provides a following technical scheme: a self-checking structure for an electric energy meter comprises an electric energy meter body, wherein the electric energy meter body is provided with a control chip and a metering acquisition module matched with the control chip, the electric energy meter body is provided with an electric quantity self-checking structure matched with the electric energy meter body, the electric quantity self-checking structure comprises a signal output module, a voltage checking module, a current checking module and a reference checking module, the voltage checking module, the current checking module and the reference checking module are electrically connected with the signal output module, and the signal output module is electrically connected with the control chip.
Through adopting above-mentioned technical scheme, on this internal original measurement collection module's of electric energy meter basis, increase an electric quantity again and from the check-up structure, the electric quantity is from the check-up structure through the comparison of sampling to the voltage, the electric current of electric energy meter body, judges whether the measurement of this electric energy meter body produces the error.
The utility model discloses further set up to: the electric quantity self-checking structure is further provided with a power supply module, the power supply module comprises a first voltage stabilizing chip U1, an input end V _ IN of the first voltage stabilizing chip U1 is electrically connected with the electric energy meter body, the first voltage stabilizing chip U1 carries OUT voltage stabilization to enable an output end V _ OUT to output +5V direct current voltage VDD, and the output end V _ OUT of the first voltage stabilizing chip U1 is electrically connected with the signal output module, the voltage checking module, the current checking module and the reference checking module respectively.
By adopting the technical scheme, the power module generates a 5V direct current stabilized power supply VDD through the first stabilized voltage chip U1, and each chip in the power supply self-checking structure can work normally.
The utility model discloses further set up to: the voltage checking module comprises a voltage comparison circuit, a first voltage sampling circuit and a second voltage sampling circuit, wherein the first voltage sampling circuit and the second voltage sampling circuit are electrically connected with the voltage comparison circuit, an input end UA _ IN of the first voltage sampling circuit is electrically connected with the electric energy meter body, and an input end UVA _ IN of the second voltage sampling circuit is electrically connected with the metering acquisition module.
By adopting the technical scheme, the input end UA _ IN of the first voltage sampling is directly connected with the electric energy meter body and is copied according to the resistance value of the original voltage-dividing resistor to obtain a new voltage value, the second current sampling circuit is directly connected with the metering sampling module through the input end UVA _ IN to obtain an old voltage value, and the voltage comparison circuit compares the voltage values of the new path and the old path and judges whether the metering of the electric energy meter which is not provided generates errors.
The utility model discloses further set up to: the current checking module comprises a current comparison circuit, a first current sampling circuit and a second current sampling circuit, wherein the first current sampling circuit and the second current sampling circuit are electrically connected with the current comparison circuit, the first current sampling circuit is provided with a current transformer L1 matched with the electric energy meter body, the output end of the current transformer L1 is electrically connected with the current comparison circuit, and the input end UIA _ IN of the second current sampling circuit is electrically connected with the metering acquisition module.
By adopting the technical scheme, the first current sampling circuit generates a new current value through the current transformer L1, the second current sampling circuit is directly connected with the metering acquisition module through the input end UIA _ IN to obtain an old current value, and the current comparison circuit compares the new current value with the old current value to judge whether the metering of the electric energy meter body generates errors.
The utility model discloses further set up to: the reference checking module comprises a reference comparison circuit, a first reference voltage circuit and a second reference voltage circuit, wherein the first reference voltage circuit and the second reference voltage circuit are electrically connected with the reference comparison circuit, the first reference voltage circuit comprises a second voltage stabilizing chip U2, the input end of the second voltage stabilizing chip U2 is electrically connected with the output end V _ OUT of the first voltage stabilizing chip U1, the input end of the second voltage stabilizing chip U2 is electrically connected with the reference comparison circuit, and the VREF _ IN input end of the second reference voltage circuit is electrically connected with the ADC reference voltage IN the metering acquisition module.
By adopting the technical scheme, the first reference circuit generates new reference voltage by stabilizing the voltage of the stabilized direct current +5V power output by the power module through the second voltage stabilizing chip U2 again, the VREF _ IN input end of the second reference voltage circuit is connected to the ADC reference voltage from the metering sampling module to obtain old reference voltage, and the two paths of voltage are compared and verified through the reference comparison circuit to determine whether errors occur.
The utility model discloses further set up to: the signal output module comprises a NOT gate chip U3 electrically connected with the control chip, the NOT gate chip U3 is electrically connected with the voltage comparison circuit, the current comparison circuit and the reference comparison circuit respectively, and a first comparator U4, a second comparator U5 and a third comparator U6 are arranged in the voltage comparison circuit, the current comparison circuit and the reference comparison circuit respectively.
By adopting the technical scheme, the NAND gate chip U3 collects three comparison signals of the voltage comparison circuit, the current comparison circuit and the reference comparison circuit, and if one signal exceeds a rated range, an error signal is automatically transmitted to a control chip of the electric energy meter body, and the control chip alarms and displays the problem that the error of electric quantity metering exceeds the standard.
The utility model discloses further set up to: the electric energy meter is characterized in that a communication structure matched with the control chip is further arranged in the electric energy meter body, and the communication structure is in signal connection with an upper computer through any one of a ZigBee module, a GPRS module and a Wi-Fi module.
Through adopting above-mentioned technical scheme, this internal communication structure that increases of electric energy meter keeps the communication with the host computer, in case the electric quantity detects the measurement error problem from the check-up structure and can in time carry out the feedback maintenance, also can avoid old-fashioned or the electric energy meter of function disappearance can not in time feed back wrong problem, reduces the loss that the error caused the user.
To sum up, the utility model discloses following beneficial effect has:
on the basis through at this internal original measurement collection module of electric energy meter, increase an electric quantity from the check-up structure again, the electric quantity is from the check-up structure through the voltage to the electric energy meter body, the comparison is sampled to the electric current, judge whether the measurement of this electric energy meter body produces the error, if produce the error and pass through the timely quick feedback that carries on of control chip, reduce the loss that the error caused the user, also avoid the problem that staff's on-the-spot check-up is loaded down with trivial details and can not carry out the check-up for a long time.
Drawings
Fig. 1 is a schematic circuit diagram according to a first embodiment of the present invention.
Fig. 2 is a schematic block diagram of a first embodiment of the present invention.
Fig. 3 is a schematic block diagram of a second embodiment of the present invention.
Reference numerals: 1. a signal output module; 2. a voltage checking module; 21. a voltage comparison circuit; 22. a first voltage sampling circuit; 23. a second voltage sampling circuit; 3. a current checking module; 31. a current comparison circuit; 32. a first current sampling circuit; 33. a second current sampling circuit; 4. a reference checking module; 41. a reference comparison circuit; 42. a first reference voltage circuit; 43. a second reference voltage circuit; 5. a power supply module; 6. a control chip; 7. a metering and collecting module; 8. a communication structure.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The first embodiment of the invention discloses a self-checking structure for an electric energy meter, which comprises an electric energy meter body, wherein the electric energy meter body is provided with a control chip 6 and a metering and collecting module 7 matched with the control chip 6, the electric energy meter body is provided with an electric quantity self-checking structure matched with the electric energy meter body, the electric quantity self-checking structure comprises a signal output module 1, a voltage checking module 2, a current checking module 3 and a reference checking module 4, the voltage checking module 2, the current checking module 3 and the reference checking module 4 are electrically connected with the signal output module 1, and the signal output module 1 and the control chip 6 are electrically connected with each other; on the basis of an original metering acquisition module 7 in the electric energy meter body, an electric quantity self-checking structure is additionally arranged, and whether errors occur in metering of the electric energy meter body is judged by sampling and comparing the voltage and the current of the electric energy meter body through the electric quantity self-checking structure.
The electric quantity self-checking structure is further provided with a power supply module 5, the power supply module 5 comprises a first voltage stabilizing chip U1, an input end V _ IN of the first voltage stabilizing chip U1 is electrically connected with the electric energy meter body, the first voltage stabilizing chip U1 carries OUT voltage stabilization to enable an output end V _ OUT to output +5V direct current voltage VDD, and the output end V _ OUT of the first voltage stabilizing chip U1 is electrically connected with the signal output module 1, the voltage checking module 2, the current checking module 3 and the reference checking module 4 respectively; the power module 5 generates a 5V direct current stabilized voltage power supply VDD through the first voltage stabilizing chip U1, and each chip in the power supply self-checking structure can work normally.
The voltage checking module 2 comprises a voltage comparison circuit 21, a first voltage sampling circuit 22 and a second voltage sampling circuit 23, wherein the first voltage sampling circuit 22 and the second voltage sampling circuit 23 are electrically connected with the voltage comparison circuit 21, an input end UA _ IN of the first voltage sampling circuit 22 is electrically connected with the electric energy meter body, and an input end UVA _ IN of the second voltage sampling circuit 23 is electrically connected with the metering acquisition module 7; the input end UA _ IN of the first voltage sampling is directly connected with the electric energy meter body and is copied according to the resistance value of the original voltage-dividing resistor to obtain a new voltage value, the second current sampling circuit 33 is directly connected with the metering sampling module through the input end UVA _ IN to obtain an old voltage value, and the voltage comparison circuit 21 compares the voltage values of the new path and the old path to judge whether the metering of the electric energy meter, which is not provided, has errors.
The current checking module 3 comprises a current comparison circuit 31, a first current sampling circuit 32 and a second current sampling circuit 33, wherein the first current sampling circuit 32 and the second current sampling circuit 33 are electrically connected with the current comparison circuit 31, the first current sampling circuit 32 is provided with a current transformer L1 matched with the electric energy meter body, the output end of the current transformer L1 is electrically connected with the current comparison circuit 31, and the input end UIA _ IN of the second current sampling circuit 33 is electrically connected with the metering acquisition module 7; the first current sampling circuit 32 generates a new current value through the current transformer L1, the second current sampling circuit 33 is directly connected with the metering acquisition module 7 through the input end UIA _ IN to obtain an old current value, and the current comparison circuit 31 compares the new current value with the old current value to judge whether the metering of the electric energy meter body generates errors.
The reference checking module 4 comprises a reference comparison circuit 41, a first reference voltage circuit 42 and a second reference voltage circuit 43, wherein the first reference voltage circuit 42 and the second reference voltage circuit 43 are electrically connected with the reference voltage comparison circuit 21, the first reference voltage circuit 42 comprises a second voltage stabilization chip U2, the input end of the second voltage stabilization chip U2 is electrically connected with the output end V _ OUT of the first voltage stabilization chip U1, the input end of the second voltage stabilization chip U2 is electrically connected with the reference comparison circuit 41, and the VREF _ IN input end of the second reference voltage circuit 43 is electrically connected with the ADC reference voltage IN the metering acquisition module 7; the first reference circuit generates new reference voltage by stabilizing the voltage of the stabilized direct current +5V power output by the power module 5 through the second voltage stabilizing chip U2 again, the VREF _ IN input end of the second reference voltage circuit 43 is connected to the ADC reference voltage from the metering sampling module to obtain old reference voltage, and the two paths of voltage are compared and verified through the reference comparison circuit 41 to determine whether errors occur.
The signal output module 1 comprises a not-gate chip U3 electrically connected with the control chip 6, the not-gate chip U3 is electrically connected with the voltage comparison circuit 21, the current comparison circuit 31 and the reference comparison circuit 41, and the voltage comparison circuit 21, the current comparison circuit 31 and the reference comparison circuit 41 are respectively provided with a first comparator U4, a second comparator U5 and a third comparator U6; the NAND gate chip U3 collects three comparison signals of the voltage comparison circuit 21, the current comparison circuit 31 and the reference comparison circuit 41, and if one signal exceeds a rated range, an error signal is automatically transmitted to the control chip 6 of the electric energy meter body to alarm and display the problem that the error of electric quantity metering exceeds the standard.
The working process is as follows: when the electric energy metering is checked whether an error exists, the voltage checking module 2, the current checking module 3 and the reference checking module 4 start to work simultaneously, the voltage comparison circuit 21 in the voltage checking module 2 receives one path of old voltage value generated by the metering and sampling module in the original electric energy meter body, receives one path of new voltage value obtained by self-sampling voltage division, compares and judges the two paths of voltage values, and transmits a comparison result to the signal output module 1, the current comparison circuit 31 in the current checking module 3 also receives two paths of current values, one path of old current value generated by the metering and sampling module in the electric energy meter body, and the other path of new current value obtained by self-sampling, compares and judges the two paths of current values, and transmits the comparison result to the signal output module 1, the reference checking module 4 also receives two paths of reference voltage values in a similar way, one path of old reference voltage value generated by the metering and sampling module in the electric energy meter body, and the other path of new reference voltage value obtained by self-voltage stabilization, compares the two paths of reference voltage values, and transmits the comparison result to the signal output module 1, the NAND gate chip U3 in the signal output module 1 compares the voltage comparison circuit 21, the current comparison circuit 31 and the comparison circuit 31, and the comparison circuit 6, and automatically displays an alarm signal that if an error exists in the three paths of the electric energy metering and the electric energy meter body.
In the second embodiment, on the basis of the first embodiment, as shown in fig. 3, a communication structure 8 adapted to the control chip 6 is further disposed in the electric energy meter body, and the communication structure 8 is in signal connection with an upper computer by disposing any one of a ZigBee module, a GPRS module, and a Wi-Fi module; the communication structure 8 is additionally arranged in the electric energy meter body and is communicated with an upper computer, once the electric quantity self-checking structure detects the problem of metering error, the problem that the old electric energy meter or the electric energy meter with function loss cannot feed back the error in time can be avoided, and the loss of the user caused by the error is reduced.
To sum up, the utility model discloses following beneficial effect has:
on through this internal original measurement collection module 7's of electric energy meter basis, increase an electric quantity self-checking structure again, the electric quantity self-checking structure is through the voltage to the electric energy meter body, the contrast is sampled to the electric current, judge whether the measurement of this electric energy meter body produces the error, if the error production passes through control chip 6 and in time quick feedbacks, reduce the loss that the error caused to the user, also avoid the problem that the on-the-spot check-up of staff is loaded down with trivial details and can not carry out the check-up for a long time.
The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, any modification, equivalent replacement, or improvement made within the design concept of the present invention should be included within the protection scope of the present invention.
Claims (7)
1. The utility model provides an electric energy meter is with verifying oneself structure, including the electric energy meter body, the electric energy meter body is provided with control chip (6) and with measurement collection module (7) of control chip (6) looks adaptation, its characterized in that: the electric energy meter is characterized in that an electric quantity self-checking structure matched with the electric energy meter body is arranged on the electric energy meter body, the electric quantity self-checking structure comprises a signal output module (1), a voltage checking module (2), a current checking module (3) and a reference checking module (4), and the signal output module (1) is electrically connected with a control chip (6).
2. The self-checking structure for the electric energy meter according to claim 1, characterized in that: the electric quantity self-checking structure is further provided with a power module (5), the power module (5) comprises a first voltage stabilizing chip U1, an input end V _ IN of the first voltage stabilizing chip U1 is electrically connected with the electric energy meter body, the first voltage stabilizing chip U1 is used for stabilizing voltage to enable an output end V _ OUT to output +5V direct-current voltage VDD, and the output end V _ OUT of the first voltage stabilizing chip U1 is electrically connected with the signal output module (1), the voltage checking module (2), the current checking module (3) and the reference checking module (4) respectively.
3. The self-checking structure for the electric energy meter according to claim 2, characterized in that: the voltage checking module (2) comprises a voltage comparison circuit (21), a first voltage sampling circuit (22) and a second voltage sampling circuit (23), wherein the first voltage sampling circuit (22) and the second voltage sampling circuit (23) are electrically connected with the voltage comparison circuit (21), an input end UA _ IN of the first voltage sampling circuit (22) is electrically connected with the electric energy meter body, and an input end UVA _ IN of the second voltage sampling circuit (23) is electrically connected with the metering acquisition module (7).
4. A self-checking structure for an electric energy meter according to claim 3, characterized in that: the current checking module (3) is including current comparison circuit (31) and with current comparison circuit (31) first current sampling circuit (32) and second current sampling circuit (33) of mutual electric connection, first current sampling circuit (32) be provided with the current transformer L1 of electric energy meter body looks adaptation, current transformer L1's output and current comparison circuit (31) mutual electric connection, the input UIA _ IN of second current sampling circuit (33) with measure collection module (7) mutual electric connection.
5. The self-checking structure for the electric energy meter according to claim 4, characterized in that: the reference checking module (4) comprises a reference comparison circuit (41), a first reference voltage circuit (42) and a second reference voltage circuit (43), wherein the first reference voltage circuit (42) and the second reference voltage circuit (43) are electrically connected with the reference comparison circuit (21), the first reference voltage circuit (42) comprises a second voltage stabilization chip U2, the input end of the second voltage stabilization chip U2 is electrically connected with the output end V _ OUT of the first voltage stabilization chip U1, the input end of the second voltage stabilization chip U2 is electrically connected with the reference comparison circuit (41), and the VREF _ IN input end of the second reference voltage circuit (43) is electrically connected with the ADC reference voltage IN the metering acquisition module (7).
6. The self-checking structure for the electric energy meter according to claim 5, wherein: the signal output module (1) comprises a NOT gate chip U3 electrically connected with the control chip (6), the NOT gate chip U3 is electrically connected with the voltage comparison circuit (21), the current comparison circuit (31) and the reference comparison circuit (41) respectively, and a first comparator U4, a second comparator U5 and a third comparator U6 are arranged in the voltage comparison circuit (21), the current comparison circuit (31) and the reference comparison circuit (41) respectively.
7. A self-checking structure for electric energy meters according to any of claims 1 to 6, characterized in that: the electric energy meter is characterized in that a communication structure (8) matched with the control chip (6) is further arranged in the electric energy meter body, and the communication structure (8) is in signal connection with an upper computer through any one of a ZigBee module, a GPRS module and a Wi-Fi module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220645824.4U CN217639495U (en) | 2022-03-17 | 2022-03-17 | Self-checking structure for electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220645824.4U CN217639495U (en) | 2022-03-17 | 2022-03-17 | Self-checking structure for electric energy meter |
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| Publication Number | Publication Date |
|---|---|
| CN217639495U true CN217639495U (en) | 2022-10-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220645824.4U Active CN217639495U (en) | 2022-03-17 | 2022-03-17 | Self-checking structure for electric energy meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217639495U (en) |
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2022
- 2022-03-17 CN CN202220645824.4U patent/CN217639495U/en active Active
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