FIELD OF THE INVENTION
The present invention is used to providing the controlled heating temperature to
the casing of sensors like Gyro & Accelero under test.
BACKGROUND OF THE INVENTION
In the testing of sensors like gyro & accelero, the thermal stabilization is one of the
important arenas which need to be effectively addressed. Such stabilizations are
generally achieved using manual heating and/or cooling at suitable time period. This type
of arrangement is comparatively inaccurate and requires human intervention.
The present invention is automated thermal stabilization equipment which works
in closed loop. The present invention consists of two auto transformers inside heating
tray. The outputs of these transformers are controlled through temperature controller
along with the relays residing in temperature tray. The heating elements are present in
the casing (base and cover) of sensors like gyro and accelero.
In development of Special Test Type Equipment, for testing sensors like Gyro &
Accelero controlled heating is one of the main requirements. The present invention is
capable of providing controlled heating in these special test equipments.
SUMMARY OF PRESENT INVENTION
In accordance with one aspect of present invention is capable of providing
controlled heating to sensors.
In accordance with second aspect of present invention is capable to provide
microprocessor based temperature control, the temperature can be programmed by
using the controller panel. The controller displayed current temperature and set
temperature.
In accordance with another aspect of present invention is capable of controlling &
switching of heating elements present in casing of Unit Under Test (UUT), is performed
by the temperature tray along with indication lamps.
In accordance with yet another aspect of present invention, it provides the
capability to interface with IPC by remote interface.
In accordance with yet another aspect of present invention, it is capable of
operating in either manual or in automatic mode.
In accordance with yet another aspect of present invention, it is capable of
providing variable output through autotransformers.
In accordance with yet another aspect of present invention, it is capable of
operating at high range of heating temperature with accuracy.
Annexure‐II
In accordance with yet another aspect of present invention is to provide a housed
on 19” rack and easy to carrying with handle.
In accordance with yet another aspect of present invention, it is compact & rugged
test equipment.
BRIEF DESCRIPTION OF THE DRAWINGS
The features and advantages of the present invention will become more apparent
and descriptive in the description when considered together with figure presented:
Fig. 1 is a Block diagram of Thermal Regulation system
Fig. 2 is a Front view of Heating tray
Fig. 3 is a Front view of Temperature tray
DETAILED DESCRIPTION
Refer Fig. 1. Thermal Regulation System consists of heating tray operated
through general power supply, the output of heating tray is provided to heating element
present in the casing of sensors under test. Temperature regulation of casing was
carried out by temperature regulation tray. Temperature tray consisted of temperature
controller along with relay & control circuitry. The required temperature is set through the
temperature controller. Thermal Regulation System is capable to heating the system till
the set temperature level after achieving the desired level, the command from thermal
sensor was sent to temperature controller.
Refer Fig. 1. The switching of heating element present in casing of sensor was
carried out by temperature controller based on the command received from thermal
sensor. Protection for over heating of casing was also provided in said invention,
whenever the temperature exceed (over heating occurs) the thermal fuse blown off,
which protects whole system from over heating & burning.
Functioning of heating tray:
Refer Fig. 2. Temperature tray holds two temperature controllers, which controls
the temperature of the sensor cover, base and the sensor. The normal temperature of
the sensor cover and base are maintained at set temperature. The two Microprocessor
based temperature controllers sense the temperature of the sensor cover and base
through feedback mechanism and these Controllers turn ON or OFF the relays so as to
maintain the temperatures at the required level. This tray has test points on the front
panel to allow users to check the corresponding outputs.
All power supply input required for heating tray is taken from general power supply
module. The cold control switch S2 of heating tray is in “ON” position. The Cold Control
DS2 indicator illuminates. The output of heating tray is provided to heating element &
temperature tray. In the heating tray, the switch S3 is for sensor cover heating & its
corresponding indicator is DS3. The value of the sensors voltage on the heating sensor
cover digital panel meter and on the connected voltmeter. (Refer Fig. 2)
In the heating tray, the base sensor switch S1 is in “ON” position. The Cold
Control DS1 indicator illuminates. The switch S1 is for base heating & its corresponding
indicator is DS1. The value of the sensors output signal is displayed on the heating
sensor support digital panel meter and on the connected voltmeter.
Functioning of Temperature tray:
Sensor Base Heating loops in Manual Control:
The control switch S3 of general power supply tray is kept at manual position. The
heating switch S1 of heating tray is in “ON” position. The connection is made through
interface box, pre-amplifier and unit to system and also by connecting H and F points of
J3 connector in the Interface box to the point TP3 & TP4 of the unit. Further, TP1 and
TP2 (probe point) of unit are connected to the temperature tray TP9 & TP10 (probe point
of support controller). Voltage measurements are performed at TP1 & TP2 of
temperature tray using DMM. To ascertain the rising of temperature, the voltage is
measured at test point TP3 & TP4 of temperature tray. When temperature reaches
above desire temperature level, the alarm display in the temperature controller has
started blinking and the heating voltage at test point TP3 and TP4 to the heating element
has been cut off. (Refer Fig. 1).
Cover Heating Loop in Manual Control:
The heating switch S3 of heating tray in kept in “ON” position. The connection is
made with unit and the test bench. Signal is available at test point TP5 & TP6 of
temperature tray. The casing base temperature is rising & the voltage at the test point
TP7 & TP8 temperature tray is measured. When temperature reaches above desired
level, the alarm display in the temperature controller has started blinking and the heating
voltage at test point TP7 and TP8 to the heating element has been cut off. (Refer Fig. 3).
Cover heating loop in automatic control:
The control switch S3 of general power supply tray is kept in automatic position
and Switches S1, S2 and S3 of tray are kept in “OFF” position. (Refer Fig. 3).
Thermal Safety Alarm:
The thermal alarm safety indication was available in the said invention. Whenever, the
tray is out of service and the thermal safety indicator on the tray is glowing. (Refer Fig.
2).

WE CLAIMS:-
Accordingly, the description of the present invention is to be considered as illustrative only and is for the purpose of teaching those skilled in the art of the best mode of carrying out the invention. The details may be varied substantially without departing from the spirit of the invention, and exclusive use of all modifications which are within the scope of the appended claims is reserved. We Claim

1. The Thermal Regulation System holds two temperature controllers, which controls the temperature of the sensor cover, base and the sensor. The normal temperature of the gyro cover and base are maintained at set temperature.
It is consists of
Heating Tray: This tray provides heating supply for heating sensors casing.
- Heating Gyro support base digital display Panel,
- Heating Gyro support cover digital display Panel,
- Cold control switches,
- LEDs indication for illumination,
- ON/OFF switches,
- Protection Fuses,
- Internal looms,
- Interfacing looms,
- Remote interfacing system,
Temperature Tray: This tray measures the current temperature of the sensor.
- Temperature Regulation Gyro support base digital display Panel,
- Temperature Regulation Gyro support cover digital display Panel,
- Test points,
- Protection Fuses,
- Processor base temperature controller,
- Internal looms,
- Interfacing looms &
- Remote interfacing system,
Wherein the arrangement is housed in 19” rack.

2. The Thermal Regulation System of claim 1 wherein, it has microprocessor based temperature controllers, the temperature can be programmed using the controller’s control panel. Once set the controller’s displays the current temperature and the set temperature. The temperature of the sensor cover and base through feedback mechanism and these Controllers turn ON or OFF the relays so as to maintain the temperatures at the required level.

3. The Thermal Regulation System of claim 1 wherein, it has test points on the front panel to allow users to check the corresponding outputs, test points can be increased or decreased as per requirement. It is capable to controlling & switching the system, which is under test, is performed by the tray along with indication lamps.

4. The Thermal Regulation System of claim 1 wherein, the system is capable to regulate (Increase & decrease) the temperature up to maximum & minimum level as per requirement.

5. The Thermal Regulation System of claim 1 wherein, the system is capable to controlling & switching the system, which is under test along with indication lamps.

6. The Thermal Regulation System of claim 1 wherein, the said invention capable to interface with other system by remote interface.

7. The Thermal Regulation System of claim 1 wherein, the outputs of transformers are taken to the relays in the temperature control system through which it is passed on to the heating elements available in the sensor cover and base.

8. The Thermal Regulation System of claim 1 wherein, the tray is capable to protect the whole system at each & every stage. It consists of the motherboard which acts as an interface between internal cards, to the external connectors made available at the rear end of the tray and also to the test points and LED’s in the front panel.

9. The Thermal Regulation System of claim 1 wherein, the Protection for over heating of casing was also provided in said invention, whenever the temperature exceed (over heating occurs) the thermal fuse blown off, which will protect whole system from over heating & burning.

10. The Thermal Regulation System of claim 1 wherein, test methodology of the sensors is also claimed. ,TagSPECI:As per Annexure-II