[Boutique] measurement internship summary

This article directory 1 measurement internship summary 2 measurement internship summary 3 measurement internship summary section 1: measurement internship summary

From June 14th to 25th, 2019, we conducted an engineering survey internship. We have eight members in the second group of the three classes, and the measurement mission area is 15,000 square meters in the northeast direction of the first teaching building. The measurement is carried out in two phases, the first phase is the instrument calibration correction, the control point selection and measurement; the second phase is the fragmentation measurement and the topographic map drawing.

On June 14th, we received measuring instruments, including theodolite and level, drawing board, leveling ruler, flower rod, measuring umbrella, ruler pad, steel tape measure, canvas bag, recording board, measuring hammer, hammer, and drop ball. , protractor, a total of sixteen. In the afternoon, the theodolite and the level are inspected and corrected. The level calibration test consists of three items, namely the inspection calibration of the circular level, the inspection and correction of the crosshair horizontal wire, and the inspection of the horizontal axis parallel to the collimation axis. At the same time as the leveling instrument is checked and corrected, the other members of the same group perform inspection and correction on the theodolite. The inspection and correction of the theodolite includes the inspection correction of the sighting tube perpendicular to the vertical axis, the inspection and correction of the crosshair vertical wire, and the inspection correction of the collimation axis. , the horizontal axis of the test correction, the vertical plate indicator level of the inspection correction. After the inspection, it was found that the level gauge was intact and could be used normally. The vertical fixed knob of the theodolite failed, and it could not be corrected. So we took it back to the laboratory and changed it with a theodolite. The instrument was normal. So we ended the first day of work.

On the second day, we selected the control points. After surveying the topographical terrain of the survey area and the ground construction equipment, we selected a closed wire around the first teaching building according to the known control points and measurement needs, and two through the survey area. Attached wires, a total of 20 control points, marked with red paint. The next few days are the measurement of the control points. We were divided into two groups. I and two students did the elevation measurement of the control points, and the other five students performed the angle measurement of the control points. At the same time, we measured the preliminary calculation of the data, and found that the large error immediately re-tested. When the data was sorted, the known data of the control point G was found to be wrong. After obtaining the teacher's guidance, we extended the wire to the already Know the F point. Due to the operational specifications and careful measurement, the elevation measurement is done in one go. The angle measurement progress is slow because it is unfamiliar with the instrument, the measurement method is not skilled, and the leveling takes a long time. In the subsequent measurement, the crosshair of the theodolite is tilted, resulting in a large error in the data. We got it in time. The laboratory corrected and re-measured the route with large errors. During the daytime measurement, we processed the data together at night. As a result, the angle measurement error was seriously out of the allowable range, and it was only necessary to rework the next day. After the repeated measurement calculations, we obtained the elevation and angle data of the control points. Due to the large terrain fluctuation, it is impossible to directly measure the data with the steel ruler. We use the line of sight measurement, but the accidental error caused by the reading leads to the decrease of the measurement accuracy, and the error of the distance measurement can only be kept within 1/500. Comprehensive data, calculated the coordinates and elevation of the control points, we completed the first phase of work.

The measurement of the broken part uses the theodolite, the flower rod, the leveling ruler, the drawing board, the protractor, etc. Four people make measurements. Two people record the data and process the data separately. One person punctuates and draws a sketch on the drawing, and the remaining one is responsible for logistics. And rotate each other. The measurement of the broken part is to obtain the distance between the measuring point and the control point, and the angle between the control line and the angle of the clamping, and then calculate the elevation. The student in charge of drawing should mark the position of the measuring point on the sketch and draw the symbol of the feature. The internship has been going on for a week, and we have been very skilled in operating the instrument, so the measurement of the broken part is faster. We first measured the construction equipment on the sidewalk outside the school. There are two control points on this measuring line in our survey area. Based on the known points, we measured the position of the fence, flower beds and roadside trees. And marked on the map. Due to the simplicity of the terrain, the measurement drawing is completed quickly. Next, a wire was passed through the Hehai College Laboratory, where the features were complex and it was difficult to set up the instrument. We carefully operated, the measurement process lasted for one day, there was no rest at noon, and we finished the work smoothly in the evening. The measurement of the closed wire fragments around the first teaching building was carried out three times. The first time due to the error in the calculation of the coordinate of the control point, the measurement data was invalidated. The second time, due to the instrument error, the measurement result was seriously wrong. Rework again. The third careful operation, careful calculation, and finally completed successfully. At this point, the measurement of the broken parts was also completed.

After the field was completed, we transferred to the internal industry for data collation and drawing. I am responsible for the mapping of topographic maps. Drawing is a matter of great care. I am careful and precise. During the specified time, we completed all the work of the measurement internship and returned the instrument on time.

Through this measurement internship, we have a deeper understanding of the book knowledge, understand the structure of the level and theodolite, master the use of the method, master the general principles of measurement, and enhance the use of the knowledge learned in practice. The ability also enhances the hands-on ability. In the measurement, we overcome the hot weather and continuous fatigue. Everyone is united and united, and cooperation is more tacit. We study problems together, solve problems, and ask teachers when collective discussion cannot be solved, so that we can continue to learn and practice. Measurement internship also gave us a deep understanding of the hard work of surveyors, understanding the complexity and rigor of the construction industry, and enhancing our sense of responsibility. The engineering survey internship is our first field operation, and the team collaborates to complete the surveying and mapping tasks, which lays the foundation for our future study and internship, and paves the way for future work.

Part 2: Measurement internship summary

On June 11, 2019, we officially started a two-week "Engineering Measurement Internship". Before that, we undertook a series of preparatory work under the leadership of the teacher. First, the practical significance and importance of measurement tasks and measurements are illustrated.

In this summer season, although the weather is not very good, the heat is hot, but we are still measuring the heart of An An, taking time internships, in order to complete the task as soon as possible, we work hard every day, although very tired, very hard, but we Still overcome all kinds of difficulties, and we also felt full in the internship. Before that, we learned about the theoretical knowledge of measurement through a semester study, but that is not enough. The actual operation is still vague for us. Therefore, this internship is a big test for our undergraduate purpose since the whole semester. We regard this internship as a tempering of our future work, linking the knowledge we have learned with reality, discovering our own shortcomings in practice and making up for our shortcomings.

Measurement is a pragmatic and realistic job, and it can't be done at all. It is also important that we maintain the originality of the data in the measurement internship. In order to ensure the correctness and validity of the calculation, we have to check whether the data of each measurement point is correct. We inevitably make some mistakes in the measurement, such as the reading is not accurate enough, the bubble is not centered, etc., will cause some errors. Therefore, we perform simultaneous calculations and measurements in the measurement, so that errors can be found in time, corrected in time, and many unnecessary troubles are avoided, saving time and improving work efficiency.

Measurement is also an accurate job, and through the study of learning and internships, a basic measurement profile is formed in my mind. The measurement content mainly includes two parts of measurement and measurement. The basic work of measurement includes angle measurement, distance measurement and elevation measurement.

In this internship, we learned the practical ability of measurement, and also had the patience to face difficulties, and also recognized the importance of group unity and the steps of measurement. First of all, I am familiar with the use of the level gauge and the total station. I am familiar with the use of the level gauge and the total station, and mastered the methods of inspection and calibration of the instrument. Secondly, in the process of checking and correcting the data, I understood various There are three main sources of measurement error: instrument error, external influence error, and observation error. To understand how to avoid measurement error, the maximum is to reduce the occurrence of error, that is, to do: 1, in the instrument selection to choose the appropriate instrument with higher precision. 2. Improve your own measurement level and reduce errors. 3. Reduce the error by various mathematical methods of processing data such as taking multiple measurements and taking averages. In addition, you should master a set of scientific measurement methods, in the measurement to follow the basic measurement principles, "from high to low" "from the whole to the local", "first control after the step", and to do step by step Have a check. This not only prevents the accumulation of errors, but also finds errors in time, and can improve the efficiency of measurement. Through engineering practice, I learned a lot of things that I couldn't learn in the classroom, which greatly improved my ability to start and brain, and also expanded my ability to communicate with my classmates. Once a measurement internship is completed, it is not enough to rely solely on the strength and concept of a person. Only the cooperation and solidarity of the group can make the internship complete quickly and efficiently.

We learned a lot of things during this internship. Let me better master the basic functions of measurement and some elements of measurement, and also promote the interaction with classmates, so that I understand the importance of solidarity and mutual assistance and the correct method of instrument use.

Part 3: Measurement Intern Summary

Before the internship, I was very much looking forward to it. However, the experience in this process can be said to be joyful and rewarding.

The first three days of the first phase are the level measurement records. It is not difficult to look at the content and should be completed soon. On the first day, many groups started from a reverse direction, so that everyone would grab the same position, and time would be wasted a lot in the process. So we chose the opposite direction, and this station is also the longest stop.

After a whole morning of exploration, tired and dry, we finally changed the station. But just as we are going to continue to the next stop, it is sad that the data is not qualified. For a while, I can't believe that everything we do will be lost, and everything needs to be repeated. Seriously, this is the first feeling that people are very scared. Think about how lucky everyone is to have this little gain. Later, after analysis, this result was caused because we did not understand how to operate correctly and did not master the method correctly. For example, the front and back line of sight, the method we just started is the visual method, thinking that this is faster. Unexpectedly, the error is so large. After calculating the front and rear line of sight, we did not understand that the difference between the front and rear line of sight was too large to be unqualified, and there was no retest, because everyone did not understand it and did not fully understand it. After discovering the error, we changed another method to ensure that the level is on the vertical line of the front and rear line. That is the most primitive method. With the rope distance, the result is not bad. Each of our team members observes independently, records each station, and performs accurate calculations. Doing "step check" in step by step can not only prevent the accumulation of errors, but also find errors in time, and improve the efficiency of measurement.

In the process, we spent a lot of time. On the third day, we found that many groups had completed the first task. There were only two or three groups on the road, and the instrument was exchanged the next day, so we It must be completed on this day. For this reason, all members of our team did not have a lunch break and did not have dinner, and finally completed it on the same day.

The next step is the calculation of all the data. The first calculation, the results showed that it was unqualified, and it was a tragedy. This time, it is very different from just opening. This time it means to come back for three days. It’s very sad, very unhappy, and the mood is very complicated. But fortunately, we checked again, checked, and finally found a problem. One of the data was wrongly written. After correction, the error was small. Oh, so happy, our efforts finally have a good result.

In the process, we understand that it is not enough to rely on the strength and concept of a person to measure an internship. Only the cooperation and solidarity of the group can make the internship complete quickly and efficiently. Of course, I also learned from others that things that were not too clear before, such as the processing of data, the observation of horizontal angles, and the questions of some operating steps have all been answered in the measurement. The measurement knowledge of the previous piecemeal has a comprehensive application opportunity, and the control measurement and topographic mapping process have a good understanding. Learned what you can't do in class and use the level more skillfully.

We exchanged the instruments with the first group. During the exchange process, we told the other party that there were problems with the instruments. Don't underestimate the process. If you don't figure this out, the consequences are very serious. At the same time, we exchanged each other's experiences in the internship process, and the matters that should be paid attention to each other, and of course how to avoid unnecessary mistakes.

The second stage is the building stakeout calculation data and checklist. Although, we asked how to operate, the matters of concern, but to be honest, I still don't understand, and later I asked my classmates again and again, because I didn't take classes well during class, I haven't studied it before, there are When I listened to other people, I didn't understand it. Others were speechless. In the end, I can only step by step, and I will explore it step by step with my classmates.

At the beginning, we sent a member to understand how to calculate. Soon we understood it. It was really simple to find out, so everyone started to calculate the data first. After that, we began to stake out with great enthusiasm. Soon, the data of the first classmate came out, but it was quickly found that the data was problematic, the error was too large, and the whole was beyond 5cm, and the error allowed range was 2cm. We are measuring it again, or it is not qualified. It seems that it is not an instrument problem, then there is a problem with the calculation. Going to ask the classmates, there is indeed a problem. We added an absolute value when calculating the orientation side azimuth, so that the latter data has problems. So it is necessary to calculate it again. After finally experiencing multiple calculations, we determined that the calculation was error free. Everyone started to work in rotation. Of course, each student’s proficiency in the instrument is different, and the time spent naturally is different. Students with better skills will soon get a satisfactory answer, and students who are not skilled will have to spend several times more time and energy. Some students finally adjusted the instrument. When they accidentally touched the students who came and went, the result was that they had to come back again. No way, we can only say that we did not protect the instrument. This also gave us a lesson: because of Some carelessness and temporary negligence will bring us a lot of trouble, so that we know that we must have a rigorous and serious attitude in everything we do.

I thought I was tired for so many days and had a good rest this weekend. However, we continue to stake out. Everyone in our class is working hard, and no one is lax. The work that was going to be completed next week was almost completed this weekend, and the latest was over on Monday. But what surprised us is that the first group started when we were almost finished. We saw that we have a sense of accomplishment and our efforts are rewarding.

The final stage is earthwork calculation and section drawing. Before I drew it, I still thought that I was still learning the same, and I thought I could understand it clearly when I was in class, so I should be able to solve the problem very efficiently. It’s just a little bit confusing at first, the method is not difficult, but there are many unexpected problems in the calculation process. I have counted it many times, and the results are all bizarre. It is not that the data is wrong or the computer is wrong. It is helpless. It can only come once. In this way, only after repeated calculations and calculations must be patient and patient. But when you are done, you will have a sense of accomplishment.

The two-week internship came to an end here. After the unity of each team member, we completed the work of the side chart, and everyone was excited to see the drawings we had drawn. When the students in our group exchanged their experiences in measurement, everyone felt that they had a lot of gains. Although it was very hard, we got a lot from it. Of course, there are many teachers' teachings and help from classmates.

Through this internship, we will consolidate, expand and deepen the theoretical knowledge we have learned from the classroom. First of all, I have mastered the knowledge of measurement in the classroom and know how to use the level and theodolite to measure the distance, angle, height difference, etc. I also learned how to draw a construction stakeout and topographic map.

I cherish the important part of the school's connection between the theory and the reality of the internship. Thank you for the internship arranged by the school to promote students' practical ability. At the same time, I would like to thank the teachers for their careful and patient guidance. We must have such achievements first. Thank you, our instructor, I will always cherish this experience. At the same time, this internship life is also very memorable.