Leveling interpretation method of balance for physical and chemical test

Abstract

The invention discloses a leveling interpretation method of a balance for physical and chemical tests. The method comprises the following steps of: 1, adjusting balance nuts at two ends of a balance for leveling, after leveling is confirmed, continuously reading a current leveling detection numerical value by a control module, taking a mean value, and setting the mean value as a leveling reference value; 2, an operator operates the balance, and after leveling is confirmed, a control module collects a current leveling detection numerical value; and step 3, the control module compares the leveling detection numerical value with the reference value, judges whether the balance reaches a leveling state at present, and gives an interpretation result. Compared with the prior art, automatic interpretation of balance leveling is achieved, interpretation errors are reduced, judgment accuracy is guaranteed, manual errors are reduced, and weighing accuracy is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of measuring tools, in particular to a leveling and reading method of a balance used for physical and chemical tests. Background Art

[0002] During the physics, chemistry and biology exams, based on the traditional use of physics, chemistry and biology laboratory balances, most of the time, the invigilator observes or records and takes photos. In addition, the traditional balance leveling method has not yet been combined with an artificial intelligence evaluation system, and is highly dependent on the invigilator. The error threshold cannot be controlled by manual observation of whether the balance is leveled.

[0003] Therefore, there is an urgent need for a leveling and interpretation method for balances used in physical and chemical experiments, which can be combined with an artificial intelligence evaluation system and can realize standardized, accurate and rapid interpretation of balance, without being affected by external factors, thus providing better guarantees for students' experimental results. Summary of the invention

[0004] The purpose of the present invention is to provide a method for judging the leveling of a balance for physical and chemical experiments, which can accurately and quickly judge whether the balance is leveled, narrow the error range, reduce human errors, and solve the problems existing in the above-mentioned prior art.

[0005] A method for leveling and judging a balance used in physical and chemical tests;

[0006] Step 1: Adjust the balance nuts at both ends of the balance to perform leveling. After confirming the leveling, the control module continuously reads the current leveling detection value, takes the average, and sets the average as the leveling reference value;

[0007] Step 2: The operator operates the balance, and after confirming the leveling, the control module collects the current leveling detection value;

[0008] Step 3: The control module compares the leveling detection value with the reference value, determines whether the current balance has reached a leveling state, and gives a determination result.

[0009] Furthermore, in step one, the control module is an MCU, and the number of reading times is greater than or equal to 10 times.

[0010] Furthermore, in step one, the averaging process is to perform variance analysis on the continuously read leveling detection values. When the value variance is less than 0.05, the mean of the leveling detection values ​​is taken as the leveling reference value. When the value variance is greater than or less than 0.05, an alarm is issued and the value is taken again after reconfirming the leveling. The above process is repeated and the leveling reference value is finally confirmed.

[0011] Furthermore, a magnet is provided on the tip of the balance pointer, and a Hall sensor is fixed to the rear end of the balance dividing plate or on the bracket corresponding to the balance dividing plate; the Hall sensor is used to detect the weak magnetic field at the detection position to generate a Hall sensor signal and send it to the MCU.

[0012] Furthermore, the MCU at least includes a signal transmission unit, a gain control unit, a comparator and an output unit;

[0013] The signal transmission unit is used to receive the Hall sensor signal, the gain control unit is used to receive the Hall sensor signal and detect the peak value of the Hall sensor signal, the comparator is used to compare the peak value with the reference value, and the output unit displays the comparison result on a display device and stores the record.

[0014] Furthermore, the gain control unit is used to detect the peak value of the Hall sensor signal by a circuit including a four-quadrant multiplier and a low-pass filter. The four-quadrant multiplier is used to convert the Hall sensor signal into a unidirectional pulsating signal, and the low-pass filter is used to smooth the unidirectional pulse signal to obtain a smoothed pulse signal to represent the peak value of the Hall sensor signal.

[0015] Furthermore, it also includes a monitoring module, which is used to monitor the operator placing the object to be weighed and the weight, and transmit the image to the MCU for storage.

[0016] The present invention discloses the following technical effects:

[0017] The present invention combines the intelligent development direction advocated by the current Ministry of Education and uses a digital leveling and interpretation scheme to reduce the degree of dependence on personnel and narrow the error range of experimental conclusions; thus, the accuracy of experimental conclusions is guaranteed to a certain extent.

[0018] The present invention discloses a method for judging the leveling of a balance for physical and chemical tests. Compared with a traditional balance, the present invention realizes digital judgment, can reduce the error range of balance leveling, and reduce the error of manually observing the balance of the balance. Compared with a traditional balance, it realizes accurate and rapid judgment of whether the balance is leveled, ensuring the weighing accuracy. Moreover, the balance involved in the method can realize product upgrade through the improvement of the traditional balance, reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 : Schematic diagram of the leveling and interpretation method of the balance for physical and chemical testing of the present invention;

[0021] Figure 2 : Schematic diagram of the Hall sensor circuit of the present invention;

[0022] Figure 3 : Schematic diagram of the MCU system flow of the present invention. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] The invention discloses a leveling and reading method for a balance used in physical and chemical tests;

[0026] Step 1: Adjust the balance nuts at both ends of the balance to perform leveling. After confirming the leveling, the control module continuously reads the current leveling detection value, takes the average, and sets the average as the leveling reference value;

[0027] Step 2: The operator operates the balance, and after confirming the leveling, the control module collects the current leveling detection value;

[0028] Step 3: The control module compares the leveling detection value with the reference value, determines whether the current balance has reached a leveling state, and gives a determination result.

[0029] Compared with the prior art, the present invention realizes automatic interpretation of balance leveling, reduces interpretation errors, ensures judgment accuracy, reduces manual errors, and ensures weighing accuracy.

[0030] The present invention realizes the combination of a traditional balance and an intelligent evaluation system through the implementation of the interpretation method, thereby reducing the error in physical and chemical experiment evaluation.

[0031] In this embodiment, in step 1, the control module is MCU, and the number of reading times is 10 times.

[0032] In this embodiment, in step one, the process of taking the average is to perform variance analysis on the continuously read leveling detection values. When the value variance is less than 0.05, the average of the leveling detection values ​​is taken as the leveling reference value. When the value variance is greater than or less than 0.05, an alarm is issued and the value is taken again after reconfirming the leveling. The above process is repeated and the leveling reference value is finally confirmed.

[0033] In this embodiment, a magnet is provided on the tip of the balance pointer, and a Hall sensor is fixed on the rear end of the balance dividing plate or on the bracket corresponding to the balance dividing plate; the Hall sensor is used to detect the weak magnetic field at the detection position to generate a Hall sensor signal and send it to the MCU.

[0034] In this embodiment, the MCU includes a signal transmission unit, a gain control unit, a comparator and an output unit;

[0035] The signal transmission unit is used to receive the Hall sensor signal, the gain control unit is used to receive the Hall sensor signal and detect the peak value of the Hall sensor signal, the comparator is used to compare the peak value with the reference value, and the output unit displays the comparison result on a display device and stores the record.

[0036] Specifically: Step 1, the initial factory or assessment personnel adjust the balance nuts at both ends of the balance, the pointer of the balance coincides with the red line of the scale in the dividing plate, a magnet is set on the tip of the pointer of the balance, and a Hall sensor is fixed on the rear end of the dividing plate of the balance or on the bracket corresponding to the dividing plate of the balance; the Hall sensor is used to detect the weak magnetic field at the position to be detected to generate a Hall sensor signal and send it to the MCU. The MCU continuously reads the current Hall sensor leveling detection value, and performs variance analysis on the leveling detection value. When the value variance is less than 0.05, the mean of the leveling detection value is taken as the leveling reference value. When the value variance is greater than or less than 0.05, an alarm is issued and the value is taken again after re-confirming the leveling. The above process is repeated and the leveling reference value is finally confirmed.

[0037] Step 2: The operator follows the experimental rule of "object on the left, weight on the right" and places the object to be measured on the left tray of the balance. Use tweezers to place the weight on the right tray, and then move the sliding weight on the ruler to level it.

[0038] Step 3: After the operator confirms that the balance is balanced, the MCU collects the current leveling detection value and compares it with the reference value to determine whether the current balance meets the leveling conditions.

[0039] In this embodiment, the gain control unit is used to detect the peak value of the Hall sensor signal by a circuit including a four-quadrant multiplier and a low-pass filter. The four-quadrant multiplier is used to convert the Hall sensor signal into a unidirectional pulsating signal, and the low-pass filter is used to smooth the unidirectional pulse signal to obtain a smoothed pulse signal to represent the peak value of the Hall sensor signal.

[0040] The gain control unit is designed to allow the operator to confirm when the balance pointer is shaking after confirming that the balance is leveled, thereby reducing the reading error by confirming the peak value of the Hall sensor signal.

[0041] In this embodiment, a monitoring module is also included, which is used to monitor the operator placing the weighed object and the weight, and transmit the image to the MCU for storage, so as to prevent the operator from obtaining the balance state without performing any operation on the balance, thereby reducing the error in interpretation.

[0042] Compared with the traditional balance, the present invention realizes digital judgment, can reduce the balance error range, and reduce the error of manual observation of balance balance. And compared with the traditional balance, it realizes accurate and rapid judgment of whether the balance is leveled. And the balance involved in the method can realize product upgrade through the improvement of the traditional balance, and reduce the production cost.

[0043] In the description of the present invention, it is necessary to understand that the terms "front", "rear", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0044] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A method for leveling and interpreting a balance for physical and chemical testing, characterized in that: Step 1: Adjust the balance nuts at both ends of the balance to perform leveling. After confirming the leveling, the control module continuously reads the current leveling detection value, takes the average, and sets the average as the leveling reference value; Step 2: The operator operates the balance, and after confirming the leveling, the control module collects the current leveling detection value; Step 3: The control module compares the leveling detection value with the reference value, determines whether the current balance has reached a leveling state, and gives a determination result.

2. The method for leveling and reading a balance for physical and chemical testing according to claim 1, characterized in that: In step one, the control module is an MCU, and the number of readings is greater than or equal to 10 times.

3. The method for leveling and reading a balance for physical and chemical testing according to claim 2, characterized in that: In step one, the averaging process is to perform variance analysis on the continuously read leveling detection values. When the value variance is less than 0.05, the mean of the leveling detection values ​​is taken as the leveling reference value. When the value variance is greater than or less than 0.05, an alarm is issued and the value is taken again after reconfirming the leveling. The above process is repeated and the leveling reference value is finally confirmed.

4. The method for leveling and reading a balance for physical and chemical testing according to claim 2, characterized in that: A magnet is arranged on the tip of the balance pointer, and a Hall sensor is fixed on the rear end of the balance dividing plate or on a bracket corresponding to the balance dividing plate; the Hall sensor is used to detect a weak magnetic field at a position to be detected to generate a Hall sensor signal and send it to the MCU.

5. The method for leveling and reading a balance for physical and chemical testing according to claim 4, characterized in that: The MCU at least includes a signal transmission unit, a gain control unit, a comparator and an output unit; The signal transmission unit is used to receive the Hall sensor signal, the gain control unit is used to receive the Hall sensor signal and detect the peak value of the Hall sensor signal, the comparator is used to compare the peak value with the reference value, and the output unit displays the comparison result on a display device and stores the record.

6. The method for leveling and reading a balance for physical and chemical testing according to claim 5, characterized in that: The gain control unit is used to detect the peak value of the Hall sensor signal, and the circuit includes a four-quadrant multiplier and a low-pass filter. The four-quadrant multiplier is used to convert the Hall sensor signal into a unidirectional pulsating signal, and the low-pass filter is used to smooth the unidirectional pulse signal to obtain a smoothed pulse signal to represent the peak value of the Hall sensor signal.

7. A method for leveling and reading a balance for physical and chemical testing according to any one of claims 2 to 6, characterized in that: It also includes a monitoring module, which is used to monitor the operator placing the object to be weighed and the weight, and transmit the image to the MCU for storage.

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