Leica Product High and Low Temperature Testing — Professional Verification in Extreme Environments

In the field of modern technology, radar serves as a core device for achieving long-distance detection, positioning, and communication, widely applied in critical scenarios such as national defense security, meteorological monitoring, aerospace, and maritime navigation. Different scenarios often involve extreme temperature environments. To ensure that radar maintains stable performance in complex environments, high and low temperature testing of radar has become an indispensable key step in its research, production, and inspection processes.

High and low temperature testing is high temperature testing and low temperature testing for short, used to evaluate the performance impact of equipment under high and low temperature conditions. Its main purpose is to determine the product's adaptability to extreme temperatures during storage, transportation, and use.

When conducting high and low temperature tests, the following important parameters need to be considered:

Temperature set point: Set specific values for high and low temperatures.

Temperature change rate: Control the speed of temperature change.

Holding time: The duration of holding at each temperature point.

Detection criteria: Clear detection standards to evaluate product performance.
Typically, the test sequence is to perform high temperature testing first, followed by low temperature testing, to comprehensively evaluate product performance.

In radar high and low temperature testing

the operational stability of radar directly depends on the synergy of electronic components, mechanical structures, and signal processing systems, with temperature being a key factor affecting this synergy.

Core radar components such as transmitters, receivers, antennas, and signal processors are mostly composed of semiconductor devices, precision circuits, and composite materials. Drastic temperature changes can cause parameter drift in electronic components, structural stress from thermal expansion and contraction of materials, and may even lead to irreversible damage such as solder joint detachment and insulation aging. Through high and low temperature testing, it is possible to verify in advance whether the radar can power on normally, detect targets, and transmit signals under extreme temperatures, avoiding failures caused by temperature issues in actual applications.

Radar high and low temperature test chamber

Test purpose: To verify the suitability of radar products for use under high and low temperature environmental conditions
Test equipment: High and low temperature test chamber
Test samples: Radar products
Test content: The tested product is placed in the test chamber without packaging, in a powered-on state, in a normal position, allowing the temperature to reach high temperature +55℃ ， Low temperature -40℃ , after temperature stabilization, continue for 48 hours, and after the duration, conduct post-test product inspection.

Judgment criteria : Pass basic function tests; appearance, structure, and functions are normal.

Combining the general methods of high and low temperature testing and the structural characteristics of radar, its high and low temperature tests usually cover the following core contents:

Radar product high and low temperature test data monitoring

Transmission and reception performance: Under high temperature +55℃ and low temperature -40℃ environments, monitor changes in radar product transmission power, operating frequency band, and reception sensitivity to ensure that key indicators such as detection range and resolution still meet design requirements.
Signal processing accuracy: Extreme temperatures may affect radar signal filtering and target recognition algorithms. It is necessary to test whether ranging, speed measurement, and angle measurement errors are within allowable ranges to avoid target misjudgment or missed detection.

Moving parts: Test the rotation accuracy and response speed of the rotating scanning radar servo system under high and low temperatures to avoid stalling or abnormal noises caused by grease solidification (low temperature) or component expansion (high temperature).

Continuous monitoring method: Place radar products under extreme temperatures 48h , record their continuous working status—whether automatic shutdown, data interruption, or overheating protection false triggers occur, to evaluate their sustained operation capability under long-term extreme environments.

Simulate drastic day-night temperature difference scenarios: Test the thermal shock resistance of various radar product components—whether circuit solder joints crack, structural connectors loosen, or insulation performance degrades, ensuring stability in environments with sudden temperature changes.

Power module: Test the output voltage stability and overload protection function of the power supply under high and low temperatures to avoid insufficient power supply or short circuits caused by temperature.

Cooling system: Verify the efficiency of cooling fans and heat sinks in high temperature environments to ensure that the temperature of core radar components does not exceed critical values.

The above data are only internal product test data of Radar

Radar, as the "nerve endings perceiving the external world," has stability directly related to national security, public safety, and production efficiency. Through high and low temperature testing, not only can it ensure that radar products remain "connected" in extreme environments such as polar regions, deserts, and high altitudes, but it can also drive the design of radar products toward "greater weather resistance, longer lifespan, and more reliable performance." Radar high and low temperature testing will become more efficient and precise, providing solid support for the application of radar products in various complex scenarios.