OJSC “MINSK RESEARCH INSTITUTE OF RADIOMATERIALS”
System of methane (CH4) monitoring at critical points on board a vehicle
PURPOSE
The system is designed to monitor CH4 (methane) at critical points of vehicles:
- the engine compartment;
- in the places where gas cylinders are installed;
- in the compartment of pre-starting liquid heaters of the engine;
- at the reducers of gas cylinders, etc.
The system is a microprocessor-based modular telemetry device consisting of a monitoring unit and five CH4 (methane) sensors.
The system provides monitoring of gas concentration at the following points of the vehicle:
- engine compartment – 1 sensor;
- liquid diesel engine heater compartment – 1 sensor;
- reducer – 1 sensor;
- base cylinders – 2 sensors.
SPECIFICATION
|
Parameter Description |
Norm |
| Rated voltage, V | 24 |
| Operating voltage range, V | 19 – 32 |
| Consumption current, A, max | 1.2 |
| Concentration monitoring range, % | up to 50% LCLP |
| System response thresholds: |
1st limit – 10% LCLP 2nd limit – 20% LCLP |
| Limit of permissible relative error of concentration measurement, %, max | 20 |
| Reaction time of the system, s, max | 5 |
Remark: LCLP – lower concentration limit of flame propagation (ignition).
A feature of the system is the operation in a wide temperature range from –50 to +95 °C of the CH4 sensor due to the use of a special cooling and heating system of the optical sensor. The open architecture of the system and the presence of two CAN interfaces provide an easy adaptation of the system to customer requirements, taking into account various fields of application.