现场无线

The client wanted to monitor the pressure of the gas well at offshore platform remotely to reduce maintenance cost and increase safety of maintenance personnel.

Wireless Multi-Input Temperature Transmitter YTMX580 can accept inputs from up to 8 points, and contribute to your CAPEX cost reduction.

Eliminating the wire using wireless transmitter is the perfect solution for rotating equipment. It establishes data collection between the transmitter and the gateway by reliable communication even though the dryer was rotating.

The client wanted to monitor the injection gas pressure of gas lift remotely in central control room. Antitheft measures are needed to install new equipments and cables.

Caustic soda and hydrochloric acid, produced in electrolyzer plants, are fundamental materials used in varieties of industries; chemicals, pharmaceuticals, petrol-chemicals, pulp and papers, etc. Profit is the result of the effective production with minimized running / maintenance cost. Proper control of the process brings you stabilized quality of products with the vast operational profit.

ISA100 wireless temperature and pressure transmitters.

Delayed Coker is a type of coker who's process consists of heating residual oil feed to its thermal cracking temperature in a furnace. The most important variable in industrial furnace control is temperature. Temperature is measured throughout the furnace in different zones and temperature effects the materials being manufactured and therefore must be precisely monitored to prevent deviations in quality of the final product.

Challenges

• The distance is not so long, but there are many pipes and tanks ("Pipe Jungle") in the field.
• Had to avoid the obstacles and take care multi path condition.  

Solution

Repeater is installed on high place between control room and monitor position. The extend cable is used for antenna of Gateway.

• Temperature Transmitter (YTA) x1, Pressure Transmitter (EJX) x2

Geothermal power plants create electricity from geothermal energy. These power plants are similar to other steam turbine station; however their heat source is that of the earth's core. The created steam is used to turn the turbine for the production of electricity. Technologies include Dry steam, Flash steam and Binary cycle power stations with Binary cycle being the most common geothermal plant in current production. In the process of geothermal power generation the facility needs to monitor various processes, as in this case steam line pressure sits in remote from control room's location.

Pressure measurement of tubeless tyres to monitor the air loss is one of the key performance tests in the tyre manufacturing units. Relocation of tyres from one testing rack to the other for various tests and frequent movement of the testing setup for conditional tests to various locations calls for cable free implementation for ease of handling.

A horizontal rotary miller used to grind the limestone rocks with metallic balls as grinding stones. This is used as the raw ingredient to produce cement powder. The temperature needs to be monitored in order to control the process and the quality of the final product. The user was using an induction temperature measurement based on a rail system that was very fragile and therefore unreliable.

Both bulk and finished inventories are stored in distributed tank farm remote from the site operations. These are difficult to instrument due to the infrastructure cost involved. These are then monitored daily by patrol rounds. While effective, this method does require a large skilled labor force to monitor all of tanks. This can impose an additional risk when the stored medium is of a hazardous nature.

• Daily manual reading of pressure and temperature gauges with report by phone.
• The customer wants to change measurement from off-line to on-line.
• Cabling for wired transmitters in huge plants (up to 300 meters long) is expensive.

Install a YTMX580 on the side of the rotating furnace that can wirelessly transmit measured values from multiple temperature sensors.

• Temperature is monitored to maintain consistency of the viscous fiber entering the drum.
• Existing system requires manual temperature readings.
• Wired temperature measurement is not available because the tank is rotating.

• Manual temperature reading requires walking about 130 m and climbing up and down elevated sections of the dryer stages.
• Multiple temperature measurement points along the various stages of the dryer require many cables to the control room.
• Very high humidity.

• Wireless temperature measurement
  Gateway x1, transmitter (YTA) x1, repeater x2 (The 2 repeaters are for redundancy)
• Extended antenna to circumvent obstacles and improve the radio path for stable measurement (communication was unstable when the height of the antenna was low).

• Wireless pressure and temperature monitoring.
• Repeater was set under the gateway.
• The maximum distance between the repeater and transmitters is approximately 500m.

ISA100 wireless temperature and pressure transmitters with orifice plates allow:

• No cabling installations or maintenance.
• Small amount of hardware and simple equipment implementation means minimizing potential vandalism.

ISA100 Wireless Monitoring  

• Gateway x1, Temperature Transmitter (YTA) x3, Pressure Transmitter (EJX) x1, Repeater x1

Gateway is installed at control room and 3m height extended antenna is set.

Blending plays a key role in industries such as food, healthcare and chemicals etc. Temperature and vacuum measurements are very important in minimizing the moisture content to ensure the quality of the final product. Strictly maintaining them throughout the process ensures the final product yield.

Direct Reduction Iron (DRI) is one of the processes to reduce oxygen from iron oxide pellets for steel plant. More than 90% of DRI processes use heated LNG as process gas where PID control for temperature or interlock control is of vital importance.

• Wireless temperature measurement 
  gateway x1, transmitter (YTA) x1
  repeater x1: between gateway and YTA.
• High quality wireless communication was confirmed.
  With repeater at center: The packet error rate was 0%.

• Oil level measurement of diesel tanks that feed fuel to their diesel generator's which are at three locations and 400 meters apart from each other.
• Also to measure level , pressure and flow to and from their main storage yard.

ISA100 Wireless Temperature and Pressure Transmitters

• Gateway x1, Temperature Transmitter (YTA) x1, Pressure Transmitter (EJX) x1

High quality wireless communication confirmed

• Packet Error Rate (PER) is 0 to 2.5%/ 5 days

One important risk to manage with regard to coal stacks is preventing fires due to spontaneous combustion.

Continuous technology improvement is ongoing in the pulp & paper industry to obtain the best possible performance. The improved plant performance translates to the higher quality improvement and lower cost, and simultaneously environmental friendly plant operation.

The use of wireless technology in industrial automation systems offers a number of potential benefits, from the obvious cost reduction brought about by the elimination of wiring to the availability of better plant information, improved productivity and better asset management. However, its practical implementation faces a number of challenges: not least the present lack of a universally agreed standard. This article looks at some of these challenges and presents the approach being taken by Yokogawa.

Standards provide many benefits to the automation end user. Standards promote choice, interoperability, transparency and ensure that things work as they should (at least insofar as the standard is defined). The influx of wireless technology into the world of process automation has brought forth its own standard—ISA100—a major standards initiative managed by the International Society of Automation (ISA).

The introduction of wireless into industrial monitoring and control not only reduces wiring and maintenance costs but also expands its applications to include those which are impossible with wired systems, such as monitoring points which have to be given up due to the difficulty of the construction, and monitoring of points on rotating or frequently moved objects.

Yokogawa has been leading the process automation industries as one of the pioneers in field digital technologies represented by the FOUNDATION fieldbus™ and Field Device Tool/Device Type Manager (FDT/DTM).

Wireless trends: Choosing a wireless network requires evaluation of communication protocols, device availability, and present future user needs.

Wiring temperature sensors installed in a chimney back to a control room can be challenging and expensive, so many plants and facilities are instead implementing wireless solutions, such as this Yokogawa YTMX580 8-input temperature transmitter.