Ravica SecurityProbe Picture Log
Filed under: Intelligent Sensors, motion detector, Security Monitoring, SensorProbes
Today, I started working with a software company who wanted to keep track of their employees that work very early or very late hours. In
general, it wasn’t a bad thing. They just wanted to make sure that the people coming into the building to work, were the people that should be. This company had already purchased monitoring and security equipment from us in the past.
This company just added a new international sales department. The work hours for the new employee were going to be 4:00am to 1:00pm. They wanted to know if they could utilize the picture log to record when people go in and out of the front door. They also wanted to limit the time frame for these pictures.
I did a bit of research and found out the answer was yes! You can set a time frame on the camera motion sensor and you can have the picture emailed or stored on the FTP server. Now, they would get an alert and a picture when someone came through the door.
At this point, they could figure out who came through the door. They then wanted to know if too many people were going through the door during the early morning hours. To do this, we used a Syslog/Eventlog application that allows you to set a threshold. Each time an image was taken with the camera, an alert would be sent to the Syslog/Eventlog manager. If a threshold was met, let say five, then an email would be sent to the security office.
The customer was excited and wanted to implement this in the coming weeks. I can’t wait to see how it comes out.
-Jimmy D
Sometimes it’s fun to brainstorm about SensorProbes
Yesterday, Jon came over to me and said, “Jim you are going to like this one!” Jon knows that I am a geek at heart and love to find new and exciting ways to integrate technology into the real world. I was intrigued.
A customer called Jon and had an interesting idea. His goal was to detect traffic coming in and out of a hall way with our motion detection probes. The server room was in the middle of the two entrances. This means you could have two points of entry. He wanted to use our motion sensors to feed his soon to be written application.
At this point my mind started to race. I was amazed at what I thought was a simple, yet practical, application of these probes. I was dazed by the logic in the condition statements that would have to be created to eliminate false positives. Yes, in those few minutes, I felt that I was part of that project.
Sadly, this Nirvanic state did not last long. I needed to attend to a few of my other customer’s issues. When the day settled down, I started to think more about this request.
The first question I had was, “Why would you want to do this?” Jon gave a few reasons, but I forgot what they were. So I came up with my own theory. He wanted to see when someone came in and when someone came out of a room. In this case, the two data points would be needed.
The second question would be, “Can we detect this?” Sure, that wouldn’t be an issue. We would be able to detect when a person goes past a motion sensor. We would then wait until that sensor is triggered again, meaning they went back the same way. Or until the other sensor was triggered, meaning they went back via the other hall. 
The third question’s answer is still in progress, “What logic will be used?” We have to have logic that will eliminate false positives, people just walking down the hall and failing to detect an entry.
I suggested adding a dry contact to the door. This would add a third data point and make detection a lot easier. When the door opens or closes, we would know when some one has passed through it’s threshold.
I don’t know what the outcome will be for this project, but I did see the purchase order come in. I will update the blog when we get the final results!
- JimmyD
The future of airconditioning and how the rest of the world can monitor temperature
I just found an entry on Slashdot about a deal between IBM & Carrier to create and market a web enabled air conditioner. Apparently you are able to gain complete control of the unit via the simple web interface. Being a geek, this intrigued me. What about everyone else who cannot obtain one of these units?
Being able to log in and monitor the environment is something you can do with the Ravica line of SensorProbes. I would suggest getting one of the temperature and humidity probes to start with. From my research, high humidity plays a big role in the cost and operation of your air conditioning units. Being able to trend and be alerted during these times can be beneficial.
Next, I would use the airflow probe to tell me when the unit is on. I know, it is an odd way to detect the air conditioners state, but trust me, it’s logical. You can use an airflow sensor on any type of unit. Like the one in the above picture or built-in industrial type. With an airflow sensor, you are not limited to testing current flow or temperature.
Last, but not least, I would use the Sensor Controlled Relay to be able to turn off the unit, if you needed to, in an emergency situation.
So the good news is that you can implement Ravica’s environmental probes in various ways to help monitor your environment. What’s even better is that this technology is available to every one.
- JimmyD
The SensorProbe can Tweet!
Filed under: environmental monitoring, humidity monitoring, temperature monitoring
I don’t want to ride on the coat tails of Jon’s post about being able to send temperature alerts via Skype, but I guess I have no choice. I quickly wanted to point out that you can also send Twitter alerts form your SensorProbe. I imagined this as a second wave alert. Kinda that last ditch effort before the ship goes down. Ok, maybe I am being a bit over dramatic but in reality, this can be a great way to do a broadcast alert.
The process is easy. Browse to TwitterMail, insert your twitter username and password to get your TwitterMail address instantly. Then go to your SensorProbe and create an email alert. Alert goes off, email is sent and Twitter is fed. Make sure that everyone that is supposed to recive these messages are followers of your Twitter account.
Custom sensor integration support adds flexibility to Ravica SensorProbes
Filed under: Data Center, environmental monitoring, Intelligent Sensors, SensorProbes
Do you have a need for a sensor that is not on the Ravica list of intelligent environmental monitoring sensors? No problem! All Ravica SensorProbe models have the ability to integrate with custom sensors via our Digital Voltmeter sensor or 4-20mA sensor.
For custom integration with third party sensors, the description text can be changed to whatever you would like. This will be reflected on the summary and sensor tabs, as well as email alerts. For example, if you were integrating a custom gas sensor, you could change the label to “Chamber 5 Gas Vent” and that label would be displayed everywhere for that sensor, including data storage and graphs.
How exactly is this accomplished? Connect a compatible sensor and and configure the sensor port appropriately. On the Digital Voltmeter and 4-20mA sensor configuration pages, you can choose to display readings as either an absolute value, such as 0-100 VAC, or as a percentage (i.e. 0-100%). The external sensor used should have an output as a linearized Digital Voltmeter or 4-20mA signal in order to work with either of these sensors.
4-20mA signals are very popular in industrial sensors, because they are particularly resistant to interference from electromagnetic noise. The accuracy of our 4-20mA converters is 0.15%, and the resolution of our 4-20mA converters is 0.1mA. You can use these figures in conjunction with your sensor’s accuracy to find the overall precision of your readings. You can also calibrate the 4-20mA converter. It is worth noting that some sensors and transducers may require an extra power supply, and in some cases may need other electrical components.
It is recommended that you find the external sensor that will best meet your needs and then we can make sure it will correctly work with your SensorProbe. For example, we have customers using the Digital Voltmeter sensor to integrate pressure sensors and water salinity sensors. So whether you need to measure energy from solar panels or even radiation, the Ravica line of SensorProbes offers the flexibility to add custom sensors for almost any application.
Let us know if you have a custom sensor your would like to integrate with your Ravica equipment.
~ Jon Mills
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