Laser Light Distance Meter uses laser technology to measure distance.
It uses a laser emitter to emit a pulse of laser, generating reflection on the target object. And then receives the reflected light signal through the receiver.It calculates the distance between the target object. And the handheld laser meter based on the propagation speed and time difference of the light.
Laser measure typically consist of the following main components
Responsible for generating and emitting laser pulses. Emitters typically use semiconductor laser diodes as laser sources.
Used to receive laser beams reflected back from the target object and convert them into electrical signals. The receiver typically includes photodiodes and amplification circuits.
Time measurement device
It used to measure the time difference between the emission and reception of laser pulses. Usually, high-precision timers or flight time measurement principles use.
Display screen or output interface
It display measurement results or output data to other devices for further processing.
The working principle of this is based on principles such as flight time measurement or phase measurement. Among them, flight time measurement calculates distance by measuring the time required for laser pulses to be transmitted and received. Phase measurement calculates distance by measuring the phase change of a laser pulse.
Principle
The principle of a unit laser distance meter is based on the time flight principle of lasers. The specific principle is as follows:
Emission: It emits a pulsed laser through a laser.
Reflection: After the laser beam irradiates the surface of the target object, it will reflect and return to the machine.
Receiving: The receiver of this receives the reflected laser signal.
Time measurement: It uses a high-precision clock system to record the time difference between laser emission and reception, which is the time of flight.
Distance calculation: Based on the propagation speed of light in a vacuum (approximately 300000 kilometers per second) and the recorded time difference, the formula can use Calculate the distance D between the target object and the machine using t/2, where c is the speed of light and t is the time difference.
Why not use a tape measure?
Principle: A tape measure is a mechanical measuring tool that measures distance by stretching the tape measure. The green laser distance meter uses laser technology for distance measurement, based on the principle of laser time flight.
Measurement method: When using a tape measure, it is necessary to place the tape measure close to the object measured and manually read the value on the scale. The laser measure 100m range can automatically measure and display the distance value within a certain range without touching the measured object, simply aiming at the target and pressing the measurement button.
Accuracy and range: Tape measures are usually suitable for short distance measurements, and their accuracy is limited by human readings, usually to the millimeter level. Laser distance meter have higher accuracy and a larger measurement range, which can reach sub millimeter level accuracy and can measure distances from a few meters to several hundred meters.
Function and portability: Laser distance meter typically have multiple functions, such as continuous measurement, area calculation, volume calculation, etc. They can also store and transmit measurement data. In addition, laser meter outdoor are generally smaller, lighter, and easier to carry and use than tape measures.
In summary, a tape measure is a simple and practical mechanical measuring tool suitable for precise measurements over short distances; The laser measure adopts laser technology, which can achieve high-precision, large-scale non-contact measurement, and has more functions and portability. The choice of tool to use depends on actual needs and measurement requirements.
Measuring physical distance and volume using a laser measure instruments is one of its common applications. The following are the specific steps:
Measure physical distance:
Ensure that there are no obstructions between the product and the target object.
Aiming at the target object and pressing the measurement button at the appropriate position will emit a laser and record the time difference.
Based on the time difference and the speed of light (approximately 300000 kilometers per second), the distance between the target object and the laser meter measurement calculated.
Measurement volume:
For objects with regular shapes, such as rectangles or cubes, first use a digital distance meter to measure the length, width, and height of the object.
Then use these measurement values for volume calculation, where volume=length × Width × Height.
For irregularly shaped objects, approximate methods can be used:
Firstly, measure the maximum length (L) and maximum width (W) of the object.
Then select a section with a certain height (H) for measurement, and measure the length (l) and width (w) of the section.
Finally, use the measured values to calculate the volume through an approximate formula. For example, the volume ≈ (l × W × H) /(L × W) .
It should noted that during the measurement process, there should be no obstructions between the laser light distance meter and the target object, and the correct measurement method should follow to obtain accurate results. In addition, different models of long distance laser measure may have different functions and operating methods. It is recommended to read the relevant instructions or refer to the guidance provided by the manufacturer before use.