What are the factors that cause unstable frequency measurements?

Changes in temperature and voltage (voltage can be stabilized with a regulated power supply) cause frequency instability. where the capacitance changes specifically to the resistance.

The impact is even greater. At such a low frequency, the resistance and capacitance values will be used very much, and both resistance and capacitance have a temperature coefficient, and the resistance is usually a positive temperature coefficient; In addition to the small capacitance of ceramic capacitors is a negative temperature coefficient, large capacitance capacitors are generally positive temperature coefficient, especially the stability of electrolytic capacitors is worse. Conditionally, R and C can be placed in a thermostatic bath.

The factors that lead to the instability of the frequency measurement are that there is some machine damage, and there are some that are tired. Exceptionally small errors, immeasurable errors.

The factor that leads to the instability of frequency measurement is that there are errors in the measurement process, such as the number of measurements, some reaction conditions of measurement, etc.

What are the factors that cause the instability of frequency measurement, this one is when running, the second is excitement, and the second is evil. Happiness or sadness can cause instability in frequency measurements.

What factors cause the instability of the frequency measurement, if you want to cause the instability of the frequency measurement, it is first related to the climate, and it has a lot to do with whether the surrounding noise is strong, so if we want to measure its frequency, we must find a quiet place, so that we can draw accurate conclusions.

The frequency is completely unstable, mainly affected by the weather, the influence of electric current, and the influence of man-made.

There are many factors, and if it is a strenuous exercise, it will lead to unstable factor frequency measurement in the future.

Now we still have a lot of factors that cause its frequency, its measurement is unstable, and we think it's still better when we use it in sections.

What causes the instability of the frequency measurement is that its antenna is not in the right position.

All frequency-related electrical equipment will be affected.

For example, in the case of centrifugal fan pumps, the power consumption is proportional to the cubic of the frequency.

The losses of motors, transformers, etc. with iron cores are also related to gait.

It is not difficult to achieve such a measurement. However, I personally think that the important thing is to design ideas, directly seek the program, you do not gain knowledge, and you can't solve problems by yourself.

You have a wide range of frequency measurements, and the idea of using two timers is correct. However, there is no need to limit the counting of square waves to 1 second. The general idea is that for higher frequency signal measurements, the number of pulses n is counted at a fixed time t (not necessarily 1s), with frequency f = n t.

For lower frequency signal measurements, a pulse with a fixed number of periods (the number of pulses is n, n is often taken as a number of 1 or greater) is timed (time t) with frequency f = n t. The advantage of this is that at high frequencies, the measurement can be faster, and at low frequencies, the measurement is slower (this is inevitable, the fastest is n=1), but both can achieve high measurement accuracy. At low frequencies, the accuracy is much higher than 1Hz.

Didn't send the program according to your requirements, don't blame it, if you have any questions, welcome to communicate!

1. The unstable use of lifting equipment is caused by the buffer.

The buffer on the lifting equipment is the last line of defense for the safety of the equipment, and it must be set smoothly. The buffer must have a certain strength, and the buffer must be able to withstand the impact of the rated load of the lifting equipment in order to play a good role in buffering. In our real life, many construction sites, although there is a buffer this setting, but can not play a good buffer role, if the elevator does not have a buffer at all, it is forbidden to use, do not despise the lifting equipment in the safety of the last line of defense.

Second, the characteristics of the hydraulic system of the lifting equipment.

1. The hydraulic device of the lifting equipment can produce greater power than other devices, the structure of the hydraulic device is compact, the power density is large, the weight is light, the volume is small, the weight of the hydraulic motor and its volume and the weight of the same power motor and its volume are only 12% of the weight and volume.

2. The hydraulic device of the lifting equipment works extremely smoothly, the reaction speed is fast, the inertia is small, the weight is particularly light, and the hydraulic device can be started quickly, fast braking and fast frequent reversal.

The hydraulic device of the lifting platform can meet the use of a wide range to achieve stepless speed regulation, especially the use of guide rail lifting equipment, its speed regulation range is larger, and the speed regulation can be controlled in the process of using hydraulic lifting freight elevator to work and run.

According to the formula v= f where v is the speed of sound, is the wavelength and f is the frequency From the formula, it can be seen that once the frequency f changes, the speed of sound will change without changing the wavelength.

It's definitely unstable. CPU calculations are calculated in milliseconds, and you can't be calculating all the time, or idle. So the frequency fluctuations must go up and down.

The program is not finished, and if you don't move it, it won't move.

Intelligent adjustment, don't use so much so reduce the frequency.

If the temperature is too high, the frequency will be automatically reduced.

The solution is simple.

Run the program to pull up the CPU frequency, control the temperature below 30 degrees, and the full frequency.

The CPU frequency itself is self-adjusting with the size of the system task, and it will only become higher when a large number of tasks are run, and it will not be fixed at a fixed value.

If the system works properly, then don't worry too much.

After all, after the replacement, in large software or games or under full load, the CPU power supply will not be stable.

If it is not necessary, it is better to change back to the original M520.

You check with CPU-Z to see which version of the M520 processor your laptop is using. The M520 has two models, A1 and B2 cores, the latest low-power SL9WN version number is A1, while the older version of SL9WT version number is B2, the newer SL9WN supports Intel EM64T and consumes 26W, while SL9WT does not support EM64T and consumes 30W

The core of T2080 is D0, and the power consumption is 31W, so it seems that your computer's M520 may be a relatively new SL9WN model, because you change to T2080, the CPU voltage cannot go up, resulting in the instability of the core frequency of T2080.

It's a well-known thing that the compatibility of the book is not as good as the desktop one.,So it's common for problems to occur after upgrading.。

The hardware equipped in the book is only the most compatible with his factory driver and system.,The coefficient that may be displayed after you upgrade it yourself is indeed a lot higher.,But that's just a coefficient.。 The CPU you upgraded is not compatible with your notebook. It's like if you put a low-end graphics card with 1GB of video memory, it looks like it's huge, but it doesn't really have any effect at all.

So I suggest you still change your CPU to your original one, you should have a backup.

I think so, because the frequency characteristics of an unstable system are related to the frontal frequency characteristics of a stable system, i.e., their amplitude and frequency characteristics are the same. For example, for an inertial link with an unstable link, it has the same amplitude-frequency characteristics as a stable inertial link, but their phase frequency characteristics are about -90 degrees of symmetry. Therefore, if we want to measure the frequency characteristics of the unstable system, we can first measure the frequency characteristics of the corresponding stable link, and then change the phase frequency characteristics on the Bode diagram.

As for how to measure, of course, it is an experimental method, I think you know how to write it, and remember to adopt it.