KR19990085558A - Environmental Monitoring Board Test Method for Wireless Subscriber Network - Google Patents

Abstract

An environmental monitoring board test method for a wireless subscriber network is disclosed. This method is for performing the SRAM test when the tester selects the SRAM test, the process of performing the LED test when the tester selects the LED test, and the tester performs the buzzer test. If you select, the process of performing a buzzer test, If the tester selects a serial port test, The process of performing a serial port test, If the tester selects a fan alarm test, The process of performing a fan alarm test, If the tester selects a voltage sensor test Performing the voltage sensor test, performing the temperature sensor test if the tester has selected the temperature sensor test, and performing all the above tests if the tester has selected the full test.

Description

Environmental Monitoring Board Test Method for Wireless Subscriber Network

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for testing a Sensor Alarm Module (SAM) in a wireless local loop, and more particularly, to a test method for all hardware functions of an environmental monitoring board used in a wireless subscriber network system. .

The structure of a typical wireless subscriber network is as known. In a public switched telephone network (PSTN), a local loop refers to a connection between a subscriber and an exchange. Instead of the existing wired subscriber lines, which were constructed with copper lines, coaxial cables, and fiber, wireless technology is called Wireless Local Loop. The wireless subscriber network can use the wireless technology to provide reliable and flexible and economical telephone service, so that the existing telephone network can be easily developed into an information communication network in an underdeveloped area.

Especially, from the service provider's point of view, the wireless subscriber network has the advantages of low capital investment, rapid system installation, low maintenance cost, and also can be quickly recovered even when the network is damaged by natural disasters such as earthquake, flood and tsunami. Therefore, it is considered as a backup system of the existing wired network. It is also a popular technique for providing telephony services in sparsely populated rural areas.

1 is a block diagram of a typical wireless subscriber network. As shown, a system structure that can be applied to all kinds of wireless systems using a wireless subscriber network to replace a subscriber line between a fixed network and a subscriber is shown.

The wireless system of FIG. 1 includes a local exchange (LE) 6; A Radio Distribution Unit (RDU) 4, also called a radio distribution station or switching center station; A plurality of Radio Carrier Stations (RCS) 3, called radio transmission stations; It includes a number of fixed subscriber unit (FSU) 2 and telephone subscriber 1, also called fixed subscriber end or subscriber premises equipment.

The switch 6 of the conventional wireless subscriber network system has an environmental monitoring board (SAM) that checks and reports the temperature and voltage of the system. The environmental monitoring board is connected to the upper module through the RS-485 serial port and detects various system alarms and reports them to the upper module.

The environmental monitoring board provides access to the system's static random access memory (SRAM) access status, alarm light emitting diode (LED) status, alarm buzzer status, RS-485 port interface status, and fan alarms. Measures alarm status, current temperature sensor and current input voltage sensor.

2 shows an internal block diagram of the environmental monitoring board. As shown, the processor 81 of the environmental monitoring board, the temperature sensor 82, voltage sensor 83, fan 84, LED 85, buzzer 86, SRAM 87, RS-485 Port 88 and monitor 89 for the operator.

The environment monitoring board according to the prior art outputs the current temperature and voltage when the operator's command is given in the board's initialization program. Therefore, in order to test the RS-485 port, I had to mount it on the system and actually run it. In addition, tests involving SRAM, LEDs, buzzers, and fan alarm conditions had to be implemented in the system, followed by inputting the conditions under which the error actually occurred.

The test method of the environmental monitoring board according to the prior art as described above has a problem that not only reduces the discrimination power to obtain a high quality board when mass production of the board, but also the production period is long.

The present invention has been made to solve the problems of the prior art operating as described above, by testing all the functions of the environmental monitoring board of the wireless subscriber network without mounting the board in the system, whether the board is good quality The objective is to provide a full-featured test method to determine whether a product is defective.

Other objects and advantages of the present invention will become more apparent from the following detailed description of the invention and the accompanying drawings.

1 is a block diagram of a typical wireless subscriber network.

2 is an internal block diagram of an environmental monitoring board.

3 is a flowchart showing an initial operation according to the present invention;

4 is a flowchart showing a SRAM test method of an environmental monitoring board according to the present invention;

5 is a flowchart showing an LED test method of an environmental monitoring board according to the present invention;

6 is a flowchart illustrating a buzzer test method for an environmental monitoring board according to the present invention;

Figure 7 is a flow chart showing a 485 port test method of the environmental monitoring board according to the present invention.

8 is a flowchart illustrating a fan alarm test method for an environmental monitoring board according to the present invention;

9 is a flowchart illustrating a voltage sensor test method of an environmental monitoring board according to the present invention;

10 is a flow chart showing a temperature sensor test method of the environmental monitoring board according to the present invention.

<Explanation of symbols for the main parts of the drawings>

1: Subscriber

2: fixed station

3: base station

4: base station controller

5: exchange office system

6: public switched telephone network

7: other networks

8: environmental monitoring board

81: processor

82: temperature sensor

83: voltage sensor

84: fan

85: 3 LEDs

86: buzzer

87: SRAM

88: RS-485 port

89: monitor

In order to achieve the above object, a preferred embodiment according to the present invention is an environmental monitoring board mounted for monitoring the system,

Performing the SRAM test when the tester selects the SRAM test;

Performing the LED test if the tester selects the LED test;

Performing a buzzer test when the examiner selects the buzzer test;

Performing a serial port test if the tester selects a serial port test;

Performing a fan alarm test if the tester selects a fan alarm test;

Performing a voltage sensor test if the tester selects a voltage sensor test;

Performing a temperature sensor test if the tester selects a temperature sensor test; And

If the investigator selects the entire test, it includes the process of performing all the above tests.

In a preferred embodiment of the present invention, the performing of the SRAM test comprises: writing a specific value X in an arbitrary area of the memory; waiting for n seconds; Checking that the value of reading the region matches X; If it does not match, determining that the SRAM is abnormal; If matched, writing X to any area of memory; waiting for n seconds; Checking that the value of reading the region matches X; If it does not match, determining that the SRAM is abnormal; And if it matches, determining that the SRAM is normal,

Preferably, the random area of the memory is an empty area that is not used at startup of the environmental monitoring board processor,

The performing of the LED test may include: forcibly turning on and then turning off a temperature LED by a processor of the environmental monitoring board for n seconds; The processor of the environmental monitoring board forcibly turning on and off the fan alarm LED for n seconds; The processor of the environmental monitoring board forcibly turning on and off the voltage alarm LED for n seconds; Repeating said step twice; And forcing the processor of the environmental monitoring board to turn on the temperature LED, the fan alarm LED, and the voltage alarm LED for n1 seconds and then turn off.

The performing of the buzzer test may include: checking whether a buzzer is switched on; If the tester has an input key, turning on the buzzer by the processor of the environmental monitoring board; And after turning on the buzzer, waiting for n seconds and then turning off the buzzer,

The performing of the serial port test may include sending a message conforming to a message format to a serial port; Looping back the message and comparing it with the original message; Loopback the message n times while continuously increasing the value of the message data; If the looped message is different from the original message more than once, determining that the serial port is abnormal; And if the looped back message is all the same as the original message, determining that the serial port is normal,

The performing of the fan alarm test may include connecting a fan alarm port; Checking whether a problem occurs in the fan port when the fan alarm port is connected; If an error occurs in the fan alarm port, turning on the fan alarm LED; Turning on the buzzer; waiting for n seconds; Turning off the fan alarm LED; And off the buzzer,

The performing of the voltage sensor test may include sensing an output pulse from the voltage sensor; Storing the time base of the sensed pulses in an annular queue and detecting a new output pulse; Calculating each voltage value through an interval of time axes stored in a queue; Obtaining an average of the voltage values; Preferably outputting an average of the calculated voltage values,

Preferably, the output pulse from the voltage sensor is a clock whose frequency changes linearly with the voltage change.

The performing of the temperature sensor test may include: giving an initialization command to a plurality of temperature sensors connected to a processor and receiving a response; Instructing each temperature sensor that sent a response to convert a sensed temperature value; Waiting for each temperature sensor to convert a temperature value; Giving an initialization command to each temperature sensor and receiving a response; Reading the converted temperature value from each temperature sensor; Displaying each read temperature value on a monitor; Repeating the above step if there is no input key; And ending the process if the input key exists.

In the following description of the present invention, when it is determined that detailed descriptions of related known functions or configurations may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. Terms to be described later are terms defined in consideration of functions in the present invention, and may be changed according to the intention or custom of a user or a device designer. Therefore, the definition should be made based on the contents throughout the specification.

Hereinafter, with reference to the accompanying drawings will be described in detail the operating principle of the preferred embodiment of the present invention.

The environmental monitoring board according to the present invention provides eight test programs for testing the environmental monitoring board. The investigator can choose one of eight tests. The first test is the SRAM test, the second is the LED test, the third is the buzzer test, the fourth is the 485 port test, the fifth is the fan alarm test, the sixth is the voltage sensor test, the seventh is the temperature sensor test, and the eighth is the whole test.

3 is a flowchart illustrating an initial operation according to the present invention. As shown, the tester selects the desired test (10) SRAM test 100, LED test 200, buzzer test 300, 485 port test 400, fan alarm test 500, voltage sensor One of the test 600, the temperature sensor test 700, and the full test 800 is performed.

4 is a flowchart illustrating an SRAM test method 100 of an environmental monitoring board according to the present invention.

When the environment monitoring board starts up, the RAM vector table goes up in the area of "0x000000 ~ 0x000400" of SRAM, and the code of ROM (Read Only Memory) goes up in the area of "0x000400 ~ 0x020000", and it goes up to "0x020000 ~ 0x040000". The area becomes empty. Therefore, the SRAM test can be performed by writing and reading arbitrary values in this empty area.

First, an arbitrary value "0x5A" is written for each bit in the memory areas "0x020000 to 0x03FFFF". (110) After 1 second (120), the value of the area is read again to check whether the value "0x5A" remains the same. If the value does not remain, it is determined that the SRAM test is abnormal. (140) If the result of the check remains in the corresponding area, the random value “0xA5” is once again put in the same area. (150) After 1 second (160) If the value " 0xA5 " remains as is, the SRAM test is judged to be normal (180). If the value is not, the SRAM test is judged to be abnormal.

5 is a flowchart illustrating an LED test method 200 of an environmental monitoring board according to the present invention.

Controls the CPU of the environment monitoring board to forcibly turn specific LEDs on or off. Assuming abnormal temperatures, fans, and voltages, turn on each LED twice for 0.5 seconds in this order, then turn on all three LEDs simultaneously for 1.5 seconds and stop.

First turn on the temperature LED (205) 0.5 seconds later (210) turn off the temperature LED (215) then turn on the fan alarm LED (220) 0.5 seconds later (225) turn off the fan alarm LED. 230) Finally, the voltage alarm LED is turned on (235) 0.5 seconds later (240) and the voltage alarm LED is turned off (240) After the voltage alarm LED is turned off, the procedure from (205) to (240) is performed. Perform it several times. Turn on both the next temperature LED, the fan alarm LED and the voltage alarm LED (250) 1.5 seconds later (255) and turn off all LEDs. (260) After 0.5 seconds, repeat the process from (250) to (265). Repeat times.

If there is an LED that is not turned on during the above process, it is determined that the path and the corresponding LED need to be checked.

6 is a flowchart illustrating a buzzer test method 300 of an environmental monitoring board according to the present invention.

First, check if the switch state of the buzzer on the board is on (310). If the switch state of the buzzer is on, wait for the input key. (320) If the key is input, turn on the buzzer (330). The buzzer is then turned off (340). (350) If the buzzer does not sound during the above test, it is determined that the path and the corresponding buzzer need to be checked.

7 is a flowchart illustrating a method 400 for testing a 485 port of the environmental monitoring board according to the present invention.

Loop back certain message formats to test the 485 port of the environmental monitoring board. The format of the message used at this time is shown in Table 1.

field STX Length m-id Message data CRC ETX Length 8 8 8 n 8 8

The STX (Start of TeXt) field has a value of "0x68". The length field has a bit value of m-id, message data, and up to CRC. The m-id field is a message type to be actually transmitted. The cyclic redundancy check (CRC) field has a remaining value obtained by dividing the bit value from the length field to the message data field by 256. The End of TeXt (ETX) field has a value of "0x16".

Since the length field of the environmental monitoring board used in the wireless subscriber network is defined as 9 bytes, 10 messages are continuously sent to the upper module by adding STX, ETX, and CRC while increasing the value of the message data area within the corresponding length.

First, test_result is set to '0' in the environment monitoring board processor. (410) Enable interrupt of the RS-485 port. (420) Send a message to the transmission port of the RS-485 port. (430) To the receiving port. Check whether the received message matches the message sent in step 430, and if it does not match (440), increase test_result to '1', and disable interrupt (450).

Increasing the data value of the message, the process from 410 to 460 is repeated nine more times, and then it is checked whether the value of test_result is '0'. (470) If the value of test_result is 0 Since no error occurred during 10 executions, the status of the RS-485 port is determined to be normal. (480) If the value of test_result is not '0', the status of the RS-485 port is determined to be abnormal. )

If the status of RS-485 port is abnormal, it is necessary to check the path from the processor of the environmental monitoring board to the upper module.

8 is a flowchart illustrating a fan alarm test method 500 of the environmental monitoring board according to the present invention.

If an error occurs in the fan alarm port, the operation is explained on the assumption that a value of '0' is input. First, short the fan alarm switch to forcibly trigger the alarm, assuming that an alarm occurs (510). The tester connects the fan alarm port and enters an arbitrary key. The processor checks whether an input key exists (520) and again outputs a prompt to short-circuit the fan alarm switch if there is no input key (510). If the input key exists, it checks whether the fan port is '0' (530). If it is not '0', it is determined that the alarm switch is not connected or the path is bad. (540) If the fan port is '0', the fan alarm LED is turned on (550) and the buzzer is turned on (560). Wait for seconds, 570 turn off the fan alarm LED, and turn off the buzzer.

If any of the above tests occur, the LED test and the buzzer test are considered normal and it is necessary to check the paths of the processor and fan alarm ports.

9 is a flowchart illustrating a voltage sensor test method 600 of an environmental monitoring board according to the present invention.

The output from the voltage sensor is measured and converted into an actual voltage. At this time, the output from the voltage sensor is a clock that changes linearly with the voltage change, and responds at 48 KHz to approximately 48V. For testing, the processor generates 2400 clock pulses (approximately 50ms at 48V), generating interrupts at each cycle.

First, the timer of the processor is initialized. (610) If a pulse is detected and an interrupt occurs (620), the time axis is stored in a circular queue, the timer is restarted, and the interrupt is enabled (630). The timer is interrupted to calculate the voltage through the time axis stored in the queue, and the average of each value is obtained.

The method of converting the time recorded in the annular queue into a voltage value is shown in Equation 1.

Voltage = (Timer Interval × 400 + (p >> 1) 0) / p

Where p represents the time on the recorded time base.

The calculated current average voltage value is output. (650) Detects whether there is an input key to terminate the voltage sensor test, and if it is 660, disables the interrupt (670) and ends the voltage sensor test. If there is no input key, the process returns to step 640 and the voltage value is calculated and output again.

Through the above process, it may be determined whether the voltage value output to the monitor is normal.

10 is a flowchart illustrating a method 700 for testing a temperature sensor of an environmental monitoring board according to the present invention.

The processor of the environmental monitoring board is connected to four temperature sensors. Test the operation of the temperature sensor by sending a command to each temperature sensor and reading the detected temperature value.

Initially, each temperature sensor issues an initialization command and receives a response (710). The temperature sensor that sent the response in the above step instructs the digital sensor to convert the temperature value detected by the current sensor (720). Wait for the value to be converted (730) Initiate a command to receive a command back to the temperature sensor and receive a response (740) Read the converted temperature value from each temperature sensor that sent the response (750) Each temperature The temperature value read from the sensor is displayed on the monitor (760). The sensor detects whether there is an input key to terminate the temperature sensor test (770). If there is no input key, the process returns to (710) to read a new temperature value.

In the initial operation, if the examiner selects the entire test 800, all the above tests are performed at once. Through the above process, the environmental monitoring board test of the wireless subscriber network is performed.

The present invention can be variously modified and can take various forms and only the specific embodiments thereof are described in the detailed description of the invention. It is to be understood, however, that the present invention is not limited to the particular embodiments mentioned in the detailed description of the invention, but rather includes all modifications, equivalents and substitutions within the spirit and scope of the invention as defined by the appended claims. It should be understood to do.

The present invention operating as described above, by presenting a test method for all operations of the environmental monitoring board that can be applied to other systems as well as wireless subscriber network, it is possible to obtain a high-quality board by determining the state without mounting the board In addition, the status of the abnormality can be immediately identified so that action can be taken.

Claims (10)

In the environmental monitoring board mounted for the monitoring of the system, Performing the SRAM test when the tester selects the SRAM test; Performing the LED test if the tester selects the LED test; Performing a buzzer test when the examiner selects the buzzer test; Performing a serial port test if the tester selects a serial port test; Performing a fan alarm test if the tester selects a fan alarm test; Performing a voltage sensor test if the tester selects a voltage sensor test; Performing a temperature sensor test if the tester selects a temperature sensor test; And If the examiner selects the entire test, including the steps of performing all the above test, wireless monitoring network environmental monitoring board test method. The method of claim 1, wherein the performing of the SRAM test comprises: Writing a specific value X in any area of the memory; waiting for n seconds; Checking that the value of reading the region matches X; If it does not match, determining that the SRAM is abnormal; If matched, writing X to any area of memory; waiting for n seconds; Checking that the value of reading the region matches X; If it does not match, determining that the SRAM is abnormal; And And determining that the SRAM is normal if matched. 3. The method of claim 2, wherein the random area of the memory is a free area that is not used at startup of the environmental monitoring board processor. The method of claim 1, wherein performing the LED test comprises: Forcing the temperature LED on and off by the processor of the environmental monitoring board for n seconds; The processor of the environmental monitoring board forcibly turning on and off the fan alarm LED for n seconds; The processor of the environmental monitoring board forcibly turning on and off the voltage alarm LED for n seconds; Repeating said step twice; And And a processor of the environmental monitoring board forcibly turning on and off the temperature LED, the fan alarm LED, and the voltage alarm LED for n1 seconds. The method of claim 1, wherein the buzzer test is performed. Checking whether the buzzer is switched on; If the tester has an input key, turning on the buzzer by the processor of the environmental monitoring board; And And turning on the buzzer, waiting for n seconds and then turning off the buzzer. The method of claim 1, wherein the performing of the serial port test comprises: Sending a message conforming to the message format to the serial port; Looping back the message and comparing it with the original message; Loopback the message n times while continuously increasing the value of the message data; If the looped message is different from the original message more than once, determining that the serial port is abnormal; And If the looped message is the same as the original message, determining that the serial port is normal. The method of claim 1, wherein the performing of the fan alarm test comprises: Shorting the fan alarm port; Checking whether a fan alarm port has an error when the fan alarm port is connected; If no abnormality occurs in the fan alarm port, turning on the fan alarm LED; Turning on the buzzer; waiting for n seconds; Turning off the fan alarm LED; And And turning off the buzzer. The method of claim 1, wherein the performing of the voltage sensor test comprises: Sensing an output pulse from the voltage sensor; Storing the time base of the sensed pulses in an annular queue and detecting a new output pulse; Calculating each voltage value through an interval of time axes stored in a queue; Obtaining an average of the voltage values; And outputting an average of the calculated voltage values. 10. The method of claim 8, wherein the output pulse from the voltage sensor is a clock that changes frequency linearly with a voltage change. The method of claim 1, wherein the performing of the temperature sensor test comprises: Giving an initialization command to a plurality of temperature sensors connected to the processor and receiving a response; Instructing each temperature sensor that sent the response to convert the sensed temperature value; Waiting for each temperature sensor to convert a temperature value; Giving an initialization command to each temperature sensor and receiving a response; Reading the converted temperature value from each temperature sensor; Displaying each read temperature value on a monitor; Repeating the above step if there is no input key; And And if the input key exists, ending the process.