How to realize audit trail in particle counter software

How to realize audit trail in particle counter software , First, let's look at the working principle of the particle counter

Automatic particle counter is a particle measurement and analysis system , For oil products 、 Detection of particle content in water or other transparent liquids , Its main feature is the use of shading sensors . The light emitted from the light source passes through the collimator , It is gathered into a very uniform and parallel beam , The seventh generation double laser narrow light detector is shot through the window of the sensing area, and the sensing area is made of transparent optical materials , The tested liquid sample passes through it in a vertical direction , When flowing through the window, it is illuminated by a uniform parallel beam from the light source . The seventh generation double laser narrow light detector converts the received light into electrical signals , It is transmitted to the counter through the preamplifier .

Plody PLD-0201 All of the oil particle size analyzer is the seventh generation double laser narrow light detector ,
　　 When there are no particles in the liquid sample flowing through the sensing area , The output voltage of the preamplifier is a value ; When a particle in the liquid sample enters the sensing area , Part of the light is blocked by particles , The seventh generation double laser narrow light detector receives less light , The output voltage then generates a pulse . Because the amount of light blocked is proportional to the projected area of the particles , Therefore, the amplitude of the output voltage pulse directly reflects the particle size . The pulse voltage signal output by the sensor is transmitted to the analog of the counter On the comparator , Compare with the preset threshold voltage , When the pulse voltage amplitude is greater than the threshold voltage , The counter counts , By accumulating the number of pulses , That is, the number of particles . 
　　 The counter is equipped with 1024 Channels , The output signal of the sensor is transmitted to these channels at the same time , According to the calibration curve of the sensor , Set the threshold voltage of each channel in advance at the value corresponding to the particle size to be measured , In this way, each channel counts the pulses of the threshold voltage of this channel , Therefore, the counter measures the number of particles in various size ranges at the same time . 

Audit trail concept and design

Audit trail ： Refers to a kind of metadata , Include creation 、 Modification and deletion, etc GXP Record relevant information . In paper or electronic records , Audit trail can safely record the life cycle details of some data , Such as creating , Add , Delete or change information , But does not cover up or overwrite the original records . Plody PLD-LAB V8.1 Audit trail helps to reproduce the recorded event history , Including an action “ Who makes 、 What did you do 、 When and why ”.
It is a record in itself , This record records plody PLD-LAB Particle counting system V8.1GXP Record ( Create, modify or delete ) The state of change , Let everyone find out who it is , When did what , We also need to know why we should do this for the change of key record status .
The core purpose of audit trail is to realize the traceability of changes , Audit trail in the narrow sense of the industry refers to the existence of records in electronic form . In broad sense , The revision record of handwritten records and the upgrading history and approval of documents are both audit trails .

Turn on the audit trail function , That is, turn on the logging function on the server , Record the execution status of different types of servers according to the configuration . The server

Plody PLD-LAB Particle counting system V8.1 Audit trail implementation process

One 、 The first change Firebird.conf file , Open audit function ;spa

AuditTraceConfigFile = fbtrace.conf

Two 、 stay fbtrace.conf Add the database to be audited in the configuration file , Example ： monitor test database , It was recorded that 1.log In the document ; journal

database = %[\\/](test)
{
    enabled = true
    log_filename = 1.log
}

3、 ... and 、 stay fbtrace.conf Open the transaction type to be audited in the configuration file , Example ： Enable the function of recording transactions ;code

log_transactions = true

Restart the server , Every one in the database test Transactions opened on will be recorded 1.log In the document .