CN210605934U

CN210605934U - Device for acquiring signals outside meter and prompting user to charge for household intelligent electric meter

Info

Publication number: CN210605934U
Application number: CN201922157987.9U
Authority: CN
Inventors: 杨博宇
Original assignee: Nanjing University of Posts and Telecommunications
Current assignee: Nanjing University of Posts and Telecommunications
Priority date: 2019-12-05
Filing date: 2019-12-05
Publication date: 2020-05-22
Anticipated expiration: 2029-12-05

Abstract

The device for acquiring signals outside the meter and prompting a user to charge for the household intelligent electric meter comprises a power switch, a shell, a switching power supply and a short message module, wherein the upper end of the shell is provided with a magnet and a detection control mechanism; the detection control mechanism and the short message module are respectively provided with a plurality of sets, each set of detection control mechanism comprises a rubber sleeve, a photoresistor and a control circuit, and the photoresistor is arranged in the rubber sleeve; the control circuit, the switching power supply and the short message module are arranged in the shell and connected through a lead, and the shell is installed at the upper inner part of the electric meter box in an attracting mode; the lower side of each set of detection control mechanism rubber sleeve is arranged at the front outer side end of one of the ammeter shells and is positioned at the front end of the ammeter defaulting prompting light-emitting diode. This is novel when smart electric meter power consumption expense reaches minimum setting value, and when its arrearage instructed emitting diode to give out light, can be active to send corresponding SMS for user's cell-phone, and then the user can in time carry out smart electric meter continuation of fee, has reduced the influence that the user brought because of charging untimely to normal power consumption as far as possible.

Description

Device for acquiring signals outside meter and prompting user to charge for household intelligent electric meter

Technical Field

The utility model relates to a supporting data acquisition and the suggestion equipment field of using of smart electric meter, especially a domestic smart electric meter is with device that outer acquisition signal and suggestion user charge.

Background

The household intelligent electric meter (namely, the single-phase intelligent electric meter) can realize the function of pre-charging the electric charge of the user, and can reduce the trouble of paying the electric charge to a power supply bureau and the like for the user; and more importantly, the expense brought by manual meter reading of a power management department is reduced, so that the application is more and more extensive. The existing intelligent electric meter has the function of prompting a user and charging in time by the light emitting of the defaulting prompting light emitting diode at the front end of the shell when the charging cost is reduced to a certain value (when the general balance is about 30 yuan) (the defaulting prompting light emitting diode of the intelligent electric meter is positioned at the front inner side end of the shell at the front upper end of the intelligent electric meter, so that the user can watch the light emitting condition of the light emitting diode, the shell part positioned in front of the light emitting diode is in a transparent state, the distance between the light emitting surface and the front inner side end of the shell is extremely small, and the light emitting diode is normally on in the defaulting prompting and stops emitting. In practical application, the smart electric meter that every unit building a plurality of resident used, generally concentrate to install in the unit door of bottom or the ammeter case outside the unit door, therefore under a lot of circumstances, the user is owed time at the smart electric meter, because can not know the condition very first time (especially to the mounted position when the user must be on the way, the condition is more outstanding), have the probability that the charges of electricity was used up, just know the condition after the smart electric meter outage, therefore can bring certain inconvenience for the user.

Based on the above, the device which does not need to change the conventional common intelligent electric meter, can ensure that the conventional common intelligent electric meter can be conveniently and directly installed and used and can prompt the user to charge when the electric charge is about to run out is provided.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects that the prior household common intelligent electric meter only has a light-emitting diode to prompt a user to charge when the electric charge is about to be used up, cannot effectively prompt the user, and is influenced by power failure because the user cannot see prompt information, the utility model provides a novel household intelligent electric meter which does not need to change the prior common intelligent electric meter, can ensure that the prior common intelligent electric meter is convenient to be directly installed and used, can simultaneously monitor the arrearage of a plurality of common intelligent electric meters in a unit building and the like in application, when the electricity consumption cost of the body of the common intelligent ammeter reaches the lowest set value, the arrearage indicating light-emitting diode emits light, under the action of the related circuit, the corresponding short message can be automatically sent to the mobile phone of the user after a certain time, so that the user can renew the fee in time, the untimely charging of the user is reduced as much as possible, the device is used for acquiring signals outside the meter of the household intelligent electric meter which influences normal electricity utilization and prompting a user to charge.

The utility model provides a technical scheme that its technical problem adopted is:

the device for acquiring signals outside the meter and prompting a user to charge for the household intelligent electric meter comprises a power switch, a shell, a switching power supply and a short message module, and is characterized in that the upper end of the shell is provided with a plurality of grooves, permanent magnets are fixedly arranged in the grooves respectively, and the device is also provided with a detection control mechanism; the detection control mechanism and the short message module are respectively provided with a plurality of same sets, each set of detection control mechanism comprises a light-tight rubber sleeve, a photosensitive resistor and a control circuit, and the rear side end of the photosensitive resistor is fixedly arranged in the rubber sleeve; the control circuit, the switching power supply and the short message module are arranged in the shell, and the shell is installed at the upper inner part of the intelligent ammeter box in an attracting mode; the lower side of a rubber sleeve of each set of detection control mechanism is arranged at the front outer side end of the shell of one intelligent ammeter and is positioned at the front end of the arrearage prompting light-emitting diode of the intelligent ammeter, and the outer diameter of the rubber sleeve is larger than the diameter of the arrearage prompting light-emitting diode; the two ends of the power output of the switching power supply are respectively connected with the two ends of the power input of the control circuit of the plurality of short message modules and the plurality of detection control mechanisms through leads; the signal output ends of the control circuits of the multiple sets of detection control mechanisms are respectively connected with the signal input ends of the multiple sets of short message modules through leads.

Further, the switching power supply is an alternating current to direct current switching power supply module.

Further, the short message module is a short message alarm module.

Furthermore, the control circuit of each set of detection control mechanism comprises an NPN triode, a PNP triode, an electrolytic capacitor, a resistor and a relay, the detection control mechanism is connected with the base electrode of the PNP triode and the base electrode of the relay through leads, one end of a photosensitive resistor of each detection control mechanism is connected with the emitting electrode of the PNP triode and the positive power supply input end of the relay, the other end of the photosensitive resistor is connected with the base electrode of the first NPN triode, the collecting electrode of the PNP triode is connected with one end of the first resistor, the other end of the first resistor is connected with the positive electrode of the electrolytic capacitor and one end of the second resistor, the other end of the second resistor is connected with the base electrode of the second NPN triode, the emitting electrode of the second NPN triode is connected with the base electrode of the third NPN triode, the collecting electrode of the second NPN triode and the negative power supply input end of the relay are connected, and the emitting electrodes of the first.

The utility model has the advantages that: the utility model discloses can realize that the current ordinary smart electric meter that is equipped with the volume very big monitors and fills the use of fee, need not open smart electric meter during the installation, both can be the installation of power supply department, also can be the installation as required of district unit building resident family (the resident family that does not need also can not install). A plurality of sets of detection control mechanisms can monitor the arrearages of a plurality of common intelligent electric meters in units of buildings and the like at the same time, when the electricity consumption cost of the common intelligent electric meter body reaches the minimum set value, the arrearages at the front end in the shell of the common intelligent electric meter body indicate that the light-emitting diode emits light, and under the action of the control circuit, corresponding short messages can be automatically sent to the mobile phone of a user after a certain time, so that the user can timely charge the intelligent electric meter, and the influence on the normal electricity consumption caused by untimely charge of the user is reduced as far as possible. Based on the above, so this novel application prospect that has.

Drawings

The invention will be further explained with reference to the drawings and examples.

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is the structure schematic diagram between one of them set of gum cover of detecting control mechanism of the utility model and one of them smart electric meter.

Fig. 3 is a circuit diagram of the present invention.

Detailed Description

As shown in fig. 1 and 2, the device for acquiring signals outside a meter and prompting a user to charge for a household smart electric meter comprises a key power switch 7 (only one user keeps a key), a rectangular shell 1, a switching power supply 2 and a short message module 3, wherein the periphery of the upper end of the rectangular shell 1 is respectively provided with a rectangular groove 101, the grooves are respectively bonded with a permanent bar magnet 4 by glue, and the device is also provided with a detection control mechanism 5; the detection control mechanism 5 and the short message module 3 are respectively provided with a plurality of identical sets, each set of detection control mechanism 5 comprises a light-tight circular rubber sleeve 51, a photoresistor 52 and a control circuit 53, the rear side end of the photoresistor 52 is connected to the middle part of the inner upper end of the rubber sleeve 51 through glue, the light receiving surface of the photoresistor 52 is positioned at the inner lower end of the rubber sleeve 51 and is spaced from the lowermost end of the rubber sleeve by a certain distance, a circle of self-adhesive paper 54 is bonded to the lower end of the rubber sleeve 51, two pins of each photoresistor 52 are respectively connected with a lead, and the lead is led out from an opening in the middle part of the upper end; the photoresistors 52 and the rubber sleeves 51 of the multiple sets of detection control mechanisms are positioned at the outer end of the shell 1, the control circuit 53, the switching power supply 2 and the short message module 3 are installed on a circuit board, the circuit board is installed in the shell 1, and the shell 1 is installed on the inner upper part of the intelligent electric meter box through magnet attraction (the electric meter box which cannot be attracted by the magnet is adhered through double faced adhesive tapes); the lower side of a rubber sleeve 51 of each set of detection control mechanism is bonded to the front outer side end of the shell of one intelligent ammeter 6 of the intelligent ammeter boxes through annular non-stick adhesive paper 54 and is positioned at the front end of an owing fee prompting light-emitting diode 61 of the intelligent ammeter, and the outer diameter (0.7cm) of the rubber sleeve 51 is larger than the diameter of the owing fee prompting light-emitting diode 61; the wires connected with the photoresistors 52 and the control circuit 53 of the multiple sets of detection control mechanisms are bonded between the two shells of the intelligent electric meter 6 by double faced adhesive tapes to achieve the effects of attractiveness and fixation. The number of the detection control mechanism 5 is six times or less than the number of the short message module 3.

As shown in FIG. 3, the switching power supply U is a finished product of a brand bright weft AC 220V-to-12V DC switching power supply module, and has an output power of 50W. The short message module U1 is a finished product of a short message alarm module of brand Rong Ma and model JC-820C, a mobile phone number card is arranged in the finished product U1 of the short message alarm module, the short message module U1 is provided with two

power input ends

1 and 2, eight signal input ends 3-10 are provided, after each signal input end inputs a low level signal, the short message module U1 sends a short message through a wireless mobile network, the finished product U1 of the short message alarm module can store eight short messages with different contents (in the embodiment, a detector can pre-edit six short messages with different contents through the functions of the finished product U1 of the short message alarm module, the contents are respectively such as 'household 101 charging is needed, household 102 charging is needed, household 201 charging is needed, household 202 charging is needed, household 301 charging is needed, household 302 charging is needed', and the like, each short message content corresponds to one signal input end, eight signal input ends 3, eight signal input ends, a, 4. After

pins

5, 6, 7, 8, 9 and 10 are respectively triggered by low level, a finished product U1 of the short message alarm module (six corresponding user telephone numbers needing to be notified are stored in the finished product of the short message alarm module in advance through the self function of the finished product of the short message alarm module) can respectively send eight corresponding short messages with different contents, and at most, the short messages can be sent to the six telephone numbers simultaneously; in this embodiment, after the six

signal input ports

3, 4, 5, 6, 7, and 8 are triggered respectively, the finished product U1 of the short message alarm module can send six short messages with different contents respectively, and can send short messages for six phone numbers at most simultaneously.

As shown in fig. 3, the control circuit of each set of detection control mechanism includes NPN transistors Q1, Q3, Q4(Q1N, Q3N, Q4N), PNP transistor Q N (Q2N), electrolytic capacitor c (cn), resistors R N, R N (R1N, R2N), and relay k (kn), which are connected via wires, one end of a photo resistor rl (rln) of each set of detection control mechanism is connected to the emitter of PNP transistor Q N (Q2N), the anode power input of relay k (kn), the other end of the photo resistor rl rln is connected to the base of first NPN transistor Q N (Q1N), the collector of first NPN transistor Q N (Q1N) is connected to the base of PNP transistor Q N (Q2N), the collector of PNP transistor Q N (Q2N) is connected to the first resistor R N (R1N (R N), the other end of first NPN transistor Q N (R1N) is connected to the positive electrode of the first resistor R N, the second resistor cn (R N), the positive electrode of the second resistor cn (R N) is connected to the second resistor cn (R N), an emitter of the second NPN triode Q3(Q3N) is connected with a base of the third NPN triode Q4(Q4N), collectors of the second NPN triode Q3(Q3N) and the third NPN triode Q4(Q4N) are connected with a negative power input end of the relay K (KN), and emitters of the first NPN triode Q1 and the third NPN triode Q4(Q1N and Q4N) are connected with a control power input end of the relay K (KN).

Pins

1 and 2 at the power input end of a switching power supply U and two poles of an alternating current 220V power supply are respectively connected through leads,

pins

3 and 4 at the power output end of the switching power supply U are respectively connected with VCC and GND (pins 1 and 2) at the power input ends of a plurality of short message modules U1, emitting electrodes of a PNP triode Q2(Q2N) and emitting electrodes of an NPN triode Q4(Q4N) at the power input ends of a control circuit of a plurality of detection control mechanisms through leads; the signal output ends of the control circuits of the multiple sets of detection control mechanisms, namely the relay K (KN), are normally open contact ends (the normally open contact ends of the six relays) and the multiple

signal input ends

3, 4, 5, 6, 7 and 8 of the multiple sets of short message modules U1 are respectively connected through leads. Two terminals of the key power switch SK are connected in series between a pin 1 of one power input end of the switch power supply U and a pole of a 220V power supply through a lead, and a lock hole of the key power switch SK is positioned outside an opening at the front end of the shell. In the novel intelligent ammeter, each short message module U1 is matched with six detection control mechanisms for use, so that arrearage monitoring of six intelligent ammeters in the intelligent ammeter box is realized, the other intelligent ammeter in the ammeter box is matched with one short message module U1 and six detection control mechanisms according to each group of six intelligent ammeters, and the number of the short message modules U1 and the detection control mechanisms is increased or decreased as required; when the number of the last group of intelligent electric meters can not reach six, the number of the intelligent electric meters is matched with the number of the detection control mechanisms, and the signal output ends of the control circuits of the corresponding detection control mechanisms and the signal input ends of the corresponding number of the short message modules U1 are respectively connected through leads. For example, when the number of the last group of smart meters cannot reach six, and only four smart meters are available, then four smart meters are matched with four sets of detection control mechanisms, and the four relay K (the normally open contact end of KN) at the signal output ends of the control circuits of the corresponding four sets of detection control mechanisms are respectively connected with the four

signal input ends

3, 4, 5 and 6 of one set of short message module U1 through leads. When the number of the intelligent electric meters reaches six, six intelligent electric meters are matched with six sets of detection control mechanisms, and the control circuit signal output ends of the corresponding six sets of detection control mechanisms are respectively connected with six

signal input ends

3, 4, 5, 6, 7 and 8 of one set of short message module U1 through leads, wherein six relays K (normally open contact ends of KN).

Fig. 1, 2, 3 show, the utility model discloses can realize that the current ordinary smart electric meter that is very big enough to be equipped with monitors to charge uses, need not open smart electric meter during the installation, both can be the installation of power supply department, also can be that the resident family of district unit building installs as required (the resident family that does not need also can not install, does not hinder all the other users' installations in same ammeter case). When the intelligent ammeter box is installed, the shell 1 is installed on the inner upper part of the intelligent ammeter box in an attracting mode through the magnet 4; the lower side (rear side) of a rubber sleeve 51 of each set of detection control mechanism is bonded to the front outer side end of the shell of one intelligent ammeter 6 of the intelligent ammeter box through annular non-stick adhesive paper 54 and is positioned at the front end of an owing fee prompting light emitting diode 61 of the intelligent ammeter, and the outer diameter (0.7cm) of the rubber sleeve 51 is larger than the diameter of the owing fee prompting light emitting diode 61 (the light emitted by the prompting light emitting diode 61 can irradiate on the light receiving surface of the photosensitive resistor 52).

As shown in fig. 1, 2 and 3, in a plurality of sets of detection control mechanisms and short message modules of the present invention, each set includes six sets of detection control mechanisms (or less than six sets) and one set of short message module, and the working processes and principles between the sets are completely consistent; after 220V alternating current power supply enters 1 and 2 pins of the switching power supply U (on the premise of turning on the key power switch SK), 3 and 4 pins of the switching power supply U can output stable 12V power supply to enter two ends of the power supply input ends of the multiple sets of detection control mechanisms and the short message module U1 under the action of an internal circuit, so that the multiple sets of detection control mechanisms and the short message module U1 are in a power-on working state, and when the intelligent charging cost of the detection control mechanisms is enough, When the charge is higher than the minimum set amount (for example, higher than 30 yuan), the charge indication light emitting diode 61 is in a power-off state, because the rear side end of the photoresistor 52 is bonded to the middle part of the inner upper end of the rubber sleeve 51 (opaque) by glue, the lower side (rear side) of the rubber sleeve 51 is bonded to the front outer side end of the casing of the smart meter 6 by the annular non-stick adhesive paper 54, so that the photoresistor rl (rln) has extremely low illumination intensity (because the photoresistor is positioned in the upper end of the rubber sleeve, the intensity of the external light source irradiating on the light receiving surface of the photoresistor is extremely low, the resistance value is about 10M, the power output by the pin 3 of the switching power supply U is reduced in voltage by the photoresistor rl (rln), the voltage at the base of the NPN triode Q1(Q1N) is lower than 0.7V, then, the NPN triode Q1(Q1N) is in a cut-off state, the collector of which is not output, then the subsequent relay k (, therefore, no short message is sent. In the detection control mechanism, when the charging cost of the intelligent electric meter is lower than the lowest set amount (for example, lower than 30 yuan), under the action of an internal circuit of the intelligent electric meter, the charging indication light-emitting diode 61 of the intelligent electric meter is in a charged light-emitting state, because the rear side end of the photoresistor 52 is adhered to the middle part of the inner upper end of the rubber sleeve 51 (opaque) by glue, the lower side (rear side) of the rubber sleeve 51 is adhered to the front outer side end of the shell of the intelligent electric meter 6 through annular non-stick adhesive paper, thus light emitted by the indication light-emitting diode 61 irradiates on the light receiving surface of the photoresistor RL (RLN), the illumination intensity of the photoresistor RL (RLN) is increased, the resistance value is reduced to about 400K, the power output by the pin 3 of the switching power supply U is subjected to voltage reduction and current limitation through the photoresistor RL (RLN) and then enters the base of the NPN triode Q1(Q, then, the NPN triode Q1(Q1N) is in a conducting state, and its collector outputs a low level to enter the base of the PNP triode Q2(Q2N), and further, the PNP triode Q2(Q2N) conducts its collector outputs a high level to be reduced in voltage and limited in current through the resistor R1, so as to charge the electrolytic capacitor c (cn); in the beginning 10 minutes, because the electrolytic capacitor c (cn) is not fully charged, the high level output by the collector of the PNP triode Q2(Q2N) is reduced in voltage and limited in current by the resistors R1 and R2(R1N and R2N), and then the voltage at the base of the darlington tube composed of the NPN triode Q3(Q3N) and Q4(Q4N) is lower than 0.7V, so that the NPN triode Q3(Q3N) and Q4(Q4N) continue to keep the off state, the relay k (kn) continues to keep the off state and cannot be attracted by power, and the low level signal input terminal of the short message module U1 is not inputted with a signal, and therefore a short message is not sent; after charging for 10 minutes, because the electrolytic capacitor c (cn) is fully charged, the high level output by the collector of the PNP triode Q2(Q2N) is reduced in voltage and limited by the resistors R1 and R2(R1N and R2N), and then enters the darlington transistor base composed of the NPN triode Q3(Q3N) and Q4(Q4N), the voltage is higher than 0.7V, so that the NPN triode Q3(Q3N) and Q4(Q4N) are conducted, the collector of the NPN triode Q3 (Q3) and the collector of the NPN triode Q N output low level enter the negative power input end of the relay k (kn) (the positive power input end of the relay k (kn) is communicated with the 3 pin of the switching power supply U), and then the relay k (kn) is powered to pull the control power input end and the normally open contact end of the switching; at the moment, the short message module U1 is in a power-on state, the control power supply input terminal of the relay k (kn) is connected with the 4 pins of the switching power supply U, and the normally open contact terminal of the relay k (kn) is connected with the signal input terminal 3 pin of the short message module U1, so that the short message module U1 sends out the stored first short message under the action of its internal circuit (for example, the content is "household 101 needs to charge", which represents that the user of the 1 st floor 1 needs to charge); in practical situations, if one group of the second smart meters is in defaulting, the low level output by the normally open contact end of the relay k (kn) of the second detection control mechanism enters the pin 4 of the short message module U1, so that the short message module U1 sends out the stored second short message under the action of its internal circuit (for example, the content is "the resident 102 needs to charge", which represents that the user of the number 1 floor and 2 needs to charge); in practical situations, if one group of the third smart meters is in defaulting, the low level output by the relay (KN) normally open contact end of the third set of detection control mechanism enters pin 5 of the short message module U1, so that the short message module U1 sends out the stored third short message under the action of its internal circuit (for example, the content is "the resident 201 needs to charge", and represents that the user of floor 2 and floor 1 needs to charge); in practical situations, if one group of the fourth smart meters is in arrearage, the low level output by the normally open contact end of the relay (KN) of the fourth detection control mechanism enters pin 6 of the short message module U1, so that the short message module U1 sends out the stored fourth short message under the action of its internal circuit (for example, the content is "the resident 202 needs to charge", which represents that the user of floor 2 and floor 2 needs to charge); in practical situations, if one group of the fifth intelligent electric meters is in arrearage, the low level output by the normally open contact end of the relay (KN) of the fifth set of detection control mechanism enters pin 7 of the short message module U1, so that the short message module U1 sends out the stored fifth short message under the action of its internal circuit (for example, the content is "the resident 301 needs to charge", and represents that the user of floor 3 and floor 1 needs to charge); in practical situations, if one group of the sixth smart meters is in charge of arrearages, the low level output by the normally open contact end of the relay (KN) of the sixth detection control mechanism enters the pin 8 of the short message module U1, so the short message module U1 sends out the stored sixth short message under the action of its internal circuit (for example, the content is "the resident 302 needs to charge", which represents that the user of the number 2 of 3 rd buildings needs to charge), through the above circuit action, after one of the six (or less than six) smart meters in one group of the meter boxes is in charge of arrearages, the corresponding set of the short message module U1 sends a short message to the owner of the six (or less than six) smart meters at the same time, and after receiving the short message, a plurality of users can judge that the user is not in charge of the own meter through the specific short message content (for example, the short message content is 301, which represents that the user only needs to charge of 301 resident, other users may not be concerned with the short message content prompt). In this novel, the emitting diode of smart electric meter can stop giving out light after the resident continues to spend, so the power can not charge for electrolytic capacitor C (CN) again, NPN triode Q3, Q4 can not export the low level again and get into relay K (KN) negative pole power input end by its collecting electrode, relay K (KN) can lose the electricity and can not work its control power input end and normally open contact end open a way, SMS module U1 also can not sending the SMS, for next use suggestion user fills to pay and prepares. The control circuit delays the charging time of the electrolytic Capacitor (CN) for 10 minutes and sends the short message because the intelligent electric meter works, actually, the pulse indication light-emitting diode in the front end of the shell emits light once at a certain time interval, and in order to prevent light from irradiating on a light receiving surface of a photoresistor RL (RLN) under extreme conditions, a power supply charges the electrolytic capacitor C (CN) through a resistor R1(R1N), and then a short message module U1 works mistakenly to send the short message; in the present invention, since the pulse indication led emits light only for a short time and a long time, even if the light emitted by the pulse indication led irradiates the light receiving surface of the photoresistor rl (rln), the time is short, the electrolytic capacitor c (cn) cannot be fully charged, and the electrolytic capacitor c (cn) will quickly release the power which was charged last time to a very small amount within the time when the pulse indication led emits light at intervals, so that the electrolytic capacitor c (cn) cannot be fully charged, and the short message module U1 erroneously sends a short message. The utility model discloses can realize that the current ordinary smart electric meter that is equipped with the volume very big monitors and fills the use of spending, need not open smart electric meter during the installation, both can be the installation of power supply department, also can be the installation as required of district unit building resident family (the resident family that does not need also can not install). A plurality of detection control mechanisms can simultaneously monitor the arrearages of a plurality of common intelligent electric meters in unit buildings and other places, when the electricity consumption cost of the common intelligent electric meter body reaches the minimum set value, the arrearages at the front end in the shell of the common intelligent electric meter body indicate that the light-emitting diode emits light, and under the action of the control circuit, the corresponding short messages can be automatically sent to the mobile phone of a user after a certain time, so that the user can timely charge the intelligent electric meter, and the influence on the normal electricity consumption caused by untimely charge of the user is reduced as far as possible. In FIG. 3, the photoresistor RL (RLN) is model MD 45; the resistances of the resistors R1 and R2(R1N and R2N) are respectively 1.16M (obtained by connecting a plurality of resistors in series or adopting adjustable resistors) and 470K; electrolytic capacitor C (CN) model 470 μ F25V; the relay K (KN) is a DC4123 type 12V relay. The models of the NPN triode Q1(Q1N), Q3(Q3N) and Q4(Q4N) are 9014, 9013 and 9013 respectively, and the model of the PNP triode Q2(Q2N) is 9012.

The basic principles and essential features of the invention and the advantages of the invention have been shown and described above, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but rather can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The device for acquiring signals outside the meter and prompting a user to charge for the household intelligent electric meter comprises a power switch, a shell, a switching power supply and a short message module, and is characterized in that the upper end of the shell is provided with a plurality of grooves, permanent magnets are fixedly arranged in the grooves respectively, and the device is also provided with a detection control mechanism; the detection control mechanism and the short message module are respectively provided with a plurality of same sets, each set of detection control mechanism comprises a light-tight rubber sleeve, a photosensitive resistor and a control circuit, and the rear side end of the photosensitive resistor is fixedly arranged in the rubber sleeve; the control circuit, the switching power supply and the short message module are arranged in the shell, and the shell is installed at the upper inner part of the intelligent ammeter box in an attracting mode; the lower side of a rubber sleeve of each set of detection control mechanism is arranged at the front outer side end of the shell of one intelligent ammeter and is positioned at the front end of the arrearage prompting light-emitting diode of the intelligent ammeter, and the outer diameter of the rubber sleeve is larger than the diameter of the arrearage prompting light-emitting diode; the two ends of the power output of the switching power supply are respectively connected with the two ends of the power input of the control circuit of the plurality of short message modules and the plurality of detection control mechanisms through leads; the signal output ends of the control circuits of the multiple sets of detection control mechanisms are respectively connected with the signal input ends of the multiple sets of short message modules through leads.

2. The device for acquiring signals and prompting a user to charge for the household intelligent electric meter according to claim 1, wherein the switching power supply is an AC-to-DC switching power supply module.

3. The device for the household intelligent electric meter to externally acquire the signal and prompt the user to charge according to claim 1, wherein the short message module is a short message alarm module.

4. The apparatus as claimed in claim 1, wherein the control circuit of each set of the probing control mechanism comprises an NPN transistor, a PNP transistor, an electrolytic capacitor, a resistor, and a relay, which are connected by a wire, one end of a photo-resistor of each set of the probing control mechanism is connected to an emitter of the PNP transistor and a positive power input end of the relay, the other end of the photo-resistor is connected to a base of the first NPN transistor, a collector of the first NPN transistor is connected to the base of the PNP transistor, a collector of the PNP transistor is connected to one end of the first resistor, the other end of the first resistor is connected to a positive electrode of the electrolytic capacitor and one end of the second resistor, the other end of the second resistor is connected to a base of the second NPN transistor, an emitter of the second NPN transistor is connected to a base of the third NPN transistor, collectors of the second and third NPN transistors, The negative power input end of the relay is connected, and the emitting electrodes of the first NPN triode and the third NPN triode are connected with the input end of the relay control power supply.