CN202025384U

CN202025384U - User reminding circuit for cassette type ammeter

Info

Publication number: CN202025384U
Application number: CN2011201035160U
Authority: CN
Inventors: 霍凤财; 康朝海; 董宏丽; 任伟建
Original assignee: Northeast Petroleum University
Current assignee: Northeast Petroleum University
Priority date: 2011-04-11
Filing date: 2011-04-11
Publication date: 2011-11-02
Anticipated expiration: 2021-04-11

Abstract

The utility model relates to a user reminding circuit for a cassette type ammeter. The problem that a traditional cassette type ammeter can not remind a user in time before the prestored electric quantity in the ammeter is about to be used up is mainly solved. The user reminding circuit for the cassette type ammeter is characterized in that an electric quantity detecting unit comprises a No. 1 electric quantity detector and a No. 2 electric quantity detector, wherein the testing voltage inputting ends of the No. 1 electric quantity detector and the No. 2 electric quantity detector are connected as the input end of an electric quantity signal to be detected; a central control unit comprises a main chip and a buzzer driven by the amplifying signal outputting end of the main chip, wherein the main chip is a microcontroller with low power consumption, and two data inputting ports on the main chip are respectively connected with the detecting signal outputting ends of the No. 1 electric quantity detector and the No. 2 electric quantity detector; and a reminding signal transmitting unit comprises a general packet radio service (GPRS) module in which a subscriber identity module (SIM) card is embedded, wherein the reminding signal inputting end of the reminding signal transmitting unit is connected to the alarming signal outputting end on the main chip. According to the circuit, an alarming and prompting short message can be transmitted to a mobile telephone of a user by the GPRS module, so that the user is reminded of renewing in time, and the problem of sudden power failure puzzling the user is solved.

Description

A kind of user reminding circuit that is used for the cassette ammeter

Technical field

The utility model relates to a kind of circuit that is used on the cassette ammeter, specifically relates to a kind of can being installed in the pre-payment cassette ammeter user is made the circuit that electric weight is reminded.

Background technology

The cassette ammeter that pre existing is paid all is when electric weight is lower than certain value, has a power failure once to the user, thereby reminds the user in time to continue to pay dues.But do the problem that causes like this be: if the user is not in, power failure suddenly can make refrigerator thaw and electric heater is stopped transport, and does not only have the effect of in time notifying the user to continue to pay dues, can cause economic loss to the user on the contrary.If at night, do like this even the user is thought some mishaies have taken place, even can cause safety problem.But in the prior art, also in a large amount of the use, Shang Weiyou solves the effective ways of aforementioned technical problem to the pre-payment cassette ammeter of this type of sudden power.

Summary of the invention

In order to solve the prior art problem that provides in the background technology, the utility model provides a kind of user reminding circuit that is used on the cassette ammeter, the electric weight that can prestore in inside after this kind circuit is installed on the existing cassette ammeter is not enough but do not reach as yet when closing degree and send the SMS alarm prompting by GPRS network to the user, thereby has solved puzzlement user's unexpected power cut problem.

The technical solution of the utility model is: this kind is used for the user reminding circuit of cassette ammeter, form by electric weight detecting unit, central control unit and alerting signal transmitting element, wherein, described electric weight detecting unit is made up of No. 1 coulometric detector and No. 2 coulometric detectors, both test voltage input ends are connected, as the input end of electric quantity signal to be detected; Described central control unit is made of master chip and the hummer that driven by its amplifying signal output terminal, wherein, master chip is the low-power consumption microcontroller, and two data input ports on it are connected with the detection signal output terminal of No. 1 coulometric detector and No. 2 coulometric detectors respectively; Described alerting signal transmitting element is made of the GPRS module that is embedded with SIM card, and its alerting signal input end is connected to the alarm signal output ends on the described master chip.

The utlity model has following beneficial effect: after being installed on circuit described in the utility model in the existing pre-payment cassette ammeter, only need increase by one in existing cassette ammeter can be when electric weight be lower than certain value, the circuit that original trip signal is transferred to a low voltage signal, when No. 1 coulometric detector detects this caution voltage, No. 1 coulometric detector can output low level be given master chip, the master chip internal processes to this signal Processing after at first to hummer output enabling signal, with prompting user electric weight deficiency; When after at interval sometime, when No. 2 coulometric detectors detect caution voltage and have been reduced to minimum voltage, No. 2 coulometric detector also can output low level be given master chip, the master chip internal processes is exported control signal by alarm signal output ends to the GPRS module, because SIM card that the GPRS module is built-in, therefore, can send the note that please electric weight is continued to pay dues on user's mobile phone by the G net reminds, so just in time prepare to user's plenty of time and continue to pay dues, solved puzzlement user's unexpected power cut problem, provide users with the convenient, guaranteed the service quality of power supply enterprise.

Description of drawings:

Fig. 1 is a composition frame chart of the present utility model.

Fig. 2 is an electrical schematic diagram of the present utility model.

A-electric weight detecting unit among the figure, B-central control unit, C-alerting signal transmitting element, U1-master chip, U2-1 coulometric detector, U3-2 coulometric detector, U4-hummer, U5-GPRS module.

Embodiment:

The utility model is described in further detail below in conjunction with accompanying drawing:

By Fig. 1 in conjunction with shown in Figure 2, this kind is used for the user reminding circuit of cassette ammeter, form by electric weight detecting unit A, central control unit B, alerting signal transmitting element C, wherein, described electric weight detecting unit A is made up of No. 1 coulometric detector U2 and No. 2 coulometric detector U3, both test voltage input end VCC are connected, as the input end of electric quantity signal to be detected.

Described central control unit B is made of master chip U1 and the hummer U4 that driven by its amplifying signal output terminal, wherein, master chip U1 is the low-power consumption microcontroller, and two data input ports on it are connected with the detection signal output terminal of No. 1 coulometric detector U2 and No. 2 coulometric detector U3 respectively.

Described alerting signal transmitting element C is made of the GPRS module U5 that is embedded with SIM card, and its alerting signal input end is connected to the alarm signal output ends on the described master chip U1.

During concrete enforcement, described 1, No. 2 coulometric detector all adopts the R3111H551A cake core to constitute, and described master chip U1 adopts PIC24F16KA102 type low-power consumption microcontroller, and described GPRS module U5 adopts prompt wheat G200 type GPRS module.No. 1 coulometric detector U2 links to each other with 5 pin of master chip U1, and No. 2 coulometric detector U3 links to each other with 7 pin of master chip; 16 foot control system hummers of master chip.

After being installed on circuit described in the utility model in the existing pre-payment cassette ammeter, only need increase by one in existing cassette ammeter can be when electric weight be lower than certain value, transfer original trip signal the circuit of a low voltage signal to, detect the caution voltage of this circuit output by 1, No. 2 coulometric detector respectively.When No. 1 coulometric detector detected this caution voltage, No. 1 coulometric detector can output low level be given master chip, the master chip internal processes to this signal Processing after at first to hummer output enabling signal, with prompting user electric weight deficiency; When after at interval sometime, when No. 2 coulometric detectors detect caution voltage and have been reduced to minimum voltage, No. 2 coulometric detector also can output low level be given master chip, the master chip internal processes is exported control signal by alarm signal output ends to the GPRS module, because SIM card that the GPRS module is built-in, therefore, can send the note that please electric weight is continued to pay dues on user's mobile phone by the G net reminds, so just in time prepare to user's plenty of time and continue to pay dues, solved puzzlement user's unexpected power cut problem, provide users with the convenient, guaranteed the service quality of power supply enterprise.

Claims

1. a user reminding circuit that is used for the cassette ammeter is made up of electric weight detecting unit (A), central control unit (B), alerting signal transmitting element (C), it is characterized in that:

Described electric weight detecting unit (A) is made up of No. 1 coulometric detector (U2) and No. 2 coulometric detectors (U3), and wherein, both test voltage input ends (VCC) are connected, as the input end of electric quantity signal to be detected;

Described central control unit (B) constitutes by master chip (U1) and by the hummer (U4) that its amplifying signal output terminal drives, wherein, master chip (U1) is the low-power consumption microcontroller, and two data input ports on it are connected with the detection signal output terminal of No. 1 coulometric detector (U2) with No. 2 coulometric detectors (U3) respectively;

Described alerting signal transmitting element (C) is made of the GPRS module (U5) that is embedded with SIM card, and its alerting signal input end is connected to the alarm signal output ends on the described master chip (U1).

2. a kind of user reminding circuit that is used for the cassette ammeter according to claim 1, it is characterized in that: described 1, No. 2 coulometric detector (U2, U3) all adopt the R3111H551A cake core to constitute, described master chip (U1) adopts PIC24F16KA102 type low-power consumption microcontroller, and described GPRS module (U5) adopts prompt wheat G200 type GPRS module.