CN104483652A

CN104483652A - Detection method of GPRS (General Packet Radio Service) module of electric energy meter

Info

Publication number: CN104483652A
Application number: CN201410788694.XA
Authority: CN
Inventors: 李朝; 熊宠巍; 龙志进
Original assignee: Wasion Group Co Ltd
Current assignee: Wasion Group Co Ltd
Priority date: 2014-12-19
Filing date: 2014-12-19
Publication date: 2015-04-01

Abstract

The invention discloses a detection method of a GPRS (General Packet Radio Service) module of an electric energy meter. The detection method of the GPRS module of the electric energy meter comprises the following steps: inputting an AT instruction associated with network service into the GPRS module by virtue of a serial port which is used for interacting data with the electric energy meter when flash frequency of a network lamp changes from slow to fast after the GPRS module is electrified and initialized, and judging according to returning results of the AT instruction; determining that an analog circuit of the GPRS module is unqualified if no data is returned; determining that the GPRS module fails in network registration, but the analog circuit is qualified if returned values are zero; obtaining IP address if the returning values are not zero all, and determining that the network registration of the GPRS module is successful, and a radio frequency circuit and the analog circuit of the GPRS module are qualified. According to the detection method of the GPRS module of the electric energy meter, a front-end processor is cancelled; the dependence and maintenance of the front-end processor in mass production test are cancelled. All the functions of the GPRS module are detected by sending one AT instruction; the mass production efficiency is improved.

Description

The detection method of electric energy meter GPRS module

Technical field

The present invention relates to a kind of detection method of electric energy meter GPRS module.

Background technology

The GPRS module detection scheme of existing electric energy meter is No. ICCID of GPRS module automatic acquisition SIM card, and forms registration packet and heartbeat packet based on this No. ICCID, is sent to front end processor registration and logs in.Then main website is utilized to initiate command frame to front end processor, utilize GPRS network that command frame is transparently transmitted to GPRS module by front end processor, command frame is transferred to table meter by electric energy meter RS232 interface or 485 interfaces by GPRS module again, after electric energy meter receives command frame, the result command frame after process is transferred to main website by GPRS module, GPRS network and front end processor, the real-time online realizing main website and table meter carries out data transmission.

By detecting the circuit of GPRS module with upper type, when signal and front end processor working properly, average test monolithic time about 2-3 minute.Because GPRS module logs in registration, main website and the factor impact such as the parsing of electric energy meter framing and front end processor stability, copy reading speed is comparatively slow and mortality is higher, thus it is longer to cause detecting the GPRS module time.

Existing electric energy meter GPRS module detection scheme, serious to the dependence of front end processor, and log in the overlong time of reaching the standard grade and detecting, cause testing efficiency very low, have impact on production production capacity.

Summary of the invention

The object of this invention is to provide a kind of detection method of GPRS module being carried out to the electric energy meter GPRS module detected fast, thus whether normally the mimic channel of convenient checking GPRS module and radio circuit, qualified to ensure the circuit that GPRS module is dispatched from the factory.

The detection method of this electric energy meter GPRS module provided by the invention, the method comprises the steps:

Step one, after GPRS module power-up initializing, observes its LED network lamp, when the flicker frequency of this network lamp is by when accelerating slowly, by the serial ports with electric energy meter data interaction, inputs an AT instruction relevant to Network to GPRS module;

Step 2, judges according to returning results of AT instruction:

(1) if do not have data to return, then judge that this GPRS module mimic channel is defective;

(2) if rreturn value is zero entirely, then judge this GPRS module network registry failure, but mimic channel is qualified;

(3) if rreturn value is not zero entirely, namely get IP address, then judge this GPRS module network registry success, and the radio circuit of GPRS module and mimic channel are all qualified.

The flicker frequency of described network lamp is comprised from the situation accelerated slowly and being become from " 64ms open/800ms close " " 64ms open/64ms close ".

The AT instruction of the standard A T instruction that the described AT instruction employing relevant to Network and the network information are correlated with or expansion.

The method also comprises: when removing electric energy meter, uses independent DC power supply to power to GPRS module, by AccessPort software, AT instruction is directly inputted into GPRS module, judges according to the result that GPRS module returns.

Compared with existing scheme, tool of the present invention has the following advantages:

1, present invention eliminates the use of front end processor, eliminate batch production test to the dependence of front end processor and maintenance.

2, adopt method of the present invention, at nominal conditions, sending an AT instruction can carry out global function detection to GPRS module, about the 20 seconds test duration of average monolithic GPRS module, greatly reduces the test duration, improves the efficiency of batch production.

Even if 3 foreign customers correlation parameters, as the parameters such as APN, IP, Port have been arranged, still GPRS Function detection can be carried out by method of the present invention.

Accompanying drawing explanation

Fig. 1 is electric energy meter of the present invention and GPRS module relation block diagram.

Embodiment

The present invention is on the basis of main website, electric energy meter, GPRS module original system framework, and by sending an AT instruction to GPRS module, inquiry GPRS module current network registers situation.

The present invention only need by the serial ports with electric energy meter data interaction, and input an AT instruction relevant to Network to GPRS module, the result according to returning judges, can detect GPRS module global function.

After GPRS module power-up initializing, about 20 seconds under normal circumstances, SIM card and network registry information can be obtained, rear drive network event.And GPRS module creates TCP connection and Socket, logs in front end processor registration and heartbeat, be all after acquisition network registry information.As long as GPRS module can get SIM card and network registry information, namely obtain the IP address that operator distributes, just can illustrate that the radio circuit of GPRS module is normal, program then automatically can complete follow-up network TCP and connect, logs in the events such as registration.

As shown in Figure 1, the present invention can utilize electric energy meter to power, draw the serial ports with the GPRS of electric energy meter data interaction, use Master Station Software that AT instruction is sent to GPRS module by this serial ports, then the result that returns of GPRS module, be back to Master Station Software by this serial ports, by Master Station Software, result judged, and then can detect that whether the radio circuit of GPRS module CPU inside, SIM card circuit and DC/DC power circuit, control circuit, watchdog circuit, 232 circuit are normal.Meanwhile, by observing LED network lamp, judge that whether LED network lamp indicating circuit is normal.

Concrete steps of the present invention are as follows:

First, after the GPRS module that powers on initialization, observe LED network lamp.When this network lamp flicker frequency has obvious difference, when namely becoming " 64ms opens/64ms pass " from " 64ms opens/800ms pass ", by the serial ports with electric energy meter data interaction, carry out information inquiry to GPRS module input " AT+IP " order.

Then, judge according to the Query Result of previous step:

If 1 GPRS module inquiry does not have data to return, then judge that this GPRS module mimic channel is defective;

If 2 GPRS module inquiry rreturn values are zero "+IP:0,0,0,0 " entirely, then judge this GPRS module network registry failure, but mimic channel is qualified;

The reason of this GPRS module registration failure may be: the radio circuit of this GPRS module is defective or do not insert SIM card.

If 3 GPRS module inquiry rreturn values are not zero entirely, namely get IP address, then judge this GPRS module network registry success, the radio circuit of GPRS module and mimic channel are all qualified.

The present invention can adopt the AT instruction of the standard A T instruction relevant to the network information or other expansions to inquire about.

Meanwhile, the present invention can remove electric energy meter, uses independent DC power supply to power to GPRS module, by AccessPort software, AT instruction is directly inputted into GPRS module, judges according to the result that GPRS module returns.

In addition, even if foreign customers correlation parameter (as parameters such as APN, IP, Port) has been arranged, still GPRS Function detection can have been carried out by method of the present invention.

Original method of testing, adopt the mode logging in front end processor registration, GPRS module must operate at client pattern, and is set to the APN parameter of the corresponding operator of domestic SIM card.Wherein, IP and Port is server ip and the port of installing front end processor.Otherwise GPRS module cannot log in and be registered to front end processor.And foreign customers makes GPRS module be operated in sever pattern at present, therefore, when program design, can first good for the optimum configurations such as the APN of client.The GPRS module of such employing sever module can not log on front end processor, but still is the IP address that can obtain operator's distribution, so can use " AT+IP " inquiry judging.

Claims

1. a detection method for electric energy meter GPRS module, the method comprises the steps:

Step one, after GPRS module power-up initializing, observe its LED network lamp, when the flicker frequency of this network lamp is by when accelerating slowly, by the serial ports with electric energy meter data interaction, input an AT instruction relevant to Network to GPRS module: " AT+IP " carries out information inquiry;

Step 2, judges according to returning results of AT instruction:

2. the detection method of electric energy meter GPRS module according to claim 1, is characterized in that, the flicker frequency of described network lamp is comprised from the situation accelerated slowly and being become from " 64ms open/800ms close " " 64ms open/64ms close ".

3. the detection method of electric energy meter GPRS module according to claim 1, is characterized in that, the AT instruction of the standard A T instruction that the described AT instruction employing relevant to Network and the network information are correlated with or expansion.

4. the detection method of electric energy meter GPRS module according to claim 1, it is characterized in that, the method also comprises: when removing electric energy meter, independent DC power supply is used to power to GPRS module, by AccessPort software, AT instruction is directly inputted into GPRS module, judges according to the result that GPRS module returns.