CN108489578A - The branched linear weighing method of the one-dimensional angle of weighing system - Google Patents

Abstract

The branched linear weighing method of the one-dimensional angle of weighing system, it is characterized in that：In system weighs gravitational field, size of the different gravity to power caused by the sensor in each supporting point, direction, the spatial position of position and permission, form the respective value of a complete monodrome continuous function, it is gravitational field of weighing that the respective value changes in one-dimensional space angle, its a certain section of linear change value in one-dimensional space angle is taken to be used as respective value of weighing, or it takes a certain section of respective value variation and is evenly distributed, the average value of this section can be calculated with least square method, the calculating average value is also used as straight line, simultaneous equations are established to be accepted or rejected, its process is the branched linear weighing method of the one-dimensional angle of weighing system, this method feature is to keep sensor used minimum, circuit is most simple.

Description

One-dimensional angular linear weighing method of multi-support weighing system

technical field

The invention relates to a one-dimensional angle linear weighing method for a multi-fulcrum weighing system, in particular to a one-dimensional angle linear weighing method for a multi-fulcrum weighing system.

Background technique

Foreign countries had electronic weighing applications in the 1930s, and then the British application scholar Jackson developed a metal foil resistance strain gauge, and American BLH and Revere companies created a circuit compensation adjustment process to improve the accuracy and stability of the load sensor. After the 1970s, Hogstrom in the United States designed a shear stress load sensor and an aluminum alloy small-range load sensor by using shear stress, and formulated R60 international recommendations and digital load cells for weighing and force sensors respectively. Stein in the United States and Edom in Germany used the finite element method (elastomer) to design and calculate the load sensor, and then the Soviet Union developed a series of anti-creep compensation resistance strain gauges, which made the electronic price scale develop in a diversified way. Then, the United States, Britain and the Soviet Union invented the use of low elastic modulus aluminum alloys to make multiple parallel structures to solve the sensitivity and stiffness problems, convert normal stress into shear stress, and complete the key problem of small-scale weighing. Also invented the creep compensation resistance strain gauge, so that the accuracy of the sensor is further improved. By 1985, R60 International suggested promulgating and distributing the R60 to all member countries. The currently implemented standard R60-2000 version is a passport to enter the international weighing electronics market. It started late in China, but developed rapidly. After 2000, weighing electronics had made great progress. Saimo Electric Co., Ltd. represents the epitome of the development of weighing electronics in my country. It is one step ahead in this industry. It drafted and participated in the formulation of the national standard for electronic weighing, and successfully listed with the code 300466. Throughout the development of weighing electronics, it is to continuously solve the changes in the technology, new design concept, and structure of the electronic circuit corresponding to it in practical applications, so that it can develop to this day. With the expansion of the application range of the market and the maturity of process manufacturing, competition intensifies, so the development trend of weighing electronics is miniaturization, detection and adjustment automation, installation and maintenance facilitation, modularization, integration, information processing automation, and most importantly, low cost. costing.

Contents of the invention

The invention provides a one-dimensional angular linear weighing method of a multi-fulcrum weighing system, which can better dynamically weigh the problem of insufficient rigidity caused by suspension, reduce the cost and price of weighing electronics, reduce the maintenance and repair cost of weighing electronics, and simplify weighing The electronic structure bracket realizes intelligence and modularization.

The purpose of the patent of the present invention is achieved in this way: the one-dimensional angle linear weighing method of the multi-support weighing system is characterized in that: in the system weighing gravity field, the force produced by the sensor in each supporting point by different gravitational forces The size, direction, point of action and allowable spatial position form the corresponding value of a complete single-valued continuous function. The corresponding value changes within the one-dimensional space angle, which is the weighing gravity field, whichever is a certain value within the one-dimensional space angle A segment of linear change value is used as the weighing corresponding value, and this method is called the one-dimensional angle linear weighing method of multi-support weighing system;

The specific steps of the one-dimensional angular linear weighing method of the multi-fulcrum weighing system:

Step 1: Determine the position of the sensor in each support point according to the magnitude, direction, point of action and allowable spatial position of the force;

Step 2: Each sensor can only determine a space field with a corresponding value, determine a direction in the space field, and find a space angle with the smallest change in the corresponding value in this direction ,when enough hours that tends to 0, then the segment be a straight line;

Step 3: When the change of the corresponding value of a certain section is less than ±5% and the distribution is uniform, the least square method can be used to calculate the value of the section Average, the calculated average is a straight line;

Step 4: Write out the linear equation of each sensor and its corresponding scope of application;

Step 5: By analogy, write the linear equations of all sensors and complete the linear simultaneous equations;

Step 6: According to the calculation of linear simultaneous equations, remove the approximate and repeated linear equations and the corresponding sensors, and finally determine the linear equation and the number of sensors of the support point. The characteristic of this linear equation is that the sensors used are the fewest, The simplest circuit.

Description of drawings

Fig. 1 is a flow chart of the method of the present invention.

Detailed ways

Embodiment 1: multi-support point weighing system one-dimensional angle linear weighing method is characterized in that: in the system weighing gravity field, the magnitude, direction and action point of the force produced by different gravity to the sensor in each support point and the allowable spatial position to form the corresponding value of a complete single-valued continuous function, the corresponding value changes within the one-dimensional space angle is the gravitational field, and a certain linear change value within the one-dimensional space angle is taken as the weighing force field. Weight corresponding value, this method is called one-dimensional angle linear weighing method of multi-support weighing system;

The specific steps of the one-dimensional angular linear weighing method of the multi-fulcrum weighing system:

Step 1: Determine the position of the sensor in each support point according to the magnitude, direction, point of action and allowable spatial position of the force;

Step 2: Each sensor can only determine a space field with a corresponding value, determine a direction in the space field, and find a space angle with the smallest change in the corresponding value in this direction ,when enough hours that tends to 0, then the segment be a straight line;

Step 3: When the change of the corresponding value of a certain section is less than ±5% and the distribution is uniform, the least square method can be used to calculate the value of the section Average, the calculated average is a straight line;

Step 4: Write out the linear equation of each sensor and its corresponding scope of application;

Step 5: By analogy, write the linear equations of all sensors and complete the linear simultaneous equations;

Step 6: According to the calculation of linear simultaneous equations, remove the approximate and repeated linear equations and the corresponding sensors, and finally determine the linear equation and the number of sensors of the support point. The characteristic of this linear equation is that the sensors used are the fewest, The simplest circuit.

Claims (1)

1. the branched linear weighing method of the one-dimensional angle of weighing system, it is characterized in that：In system weighs gravitational field, different gravity To the size of power, direction, position and the spatial position of permission caused by the sensor in each supporting point, one is formed The respective value of complete monodrome continuous function, the respective value changes gravitational field of as weighing in one-dimensional space angle, take its A certain section of linear change value is known as the branched one-dimensional angle of weighing system as respective value of weighing, this method in one-dimensional space angle Linear weighing method；

The specific steps of the branched linear weighing method of the one-dimensional angle of weighing system：

Step 1：According to the size of power, direction, position and the spatial position of permission, the sensing in each supporting point is determined Device position；

Step 2：Each sensor can only determine the spatial field of a corresponding numerical value, and a direction is determined in the spatial field, The space angle of one section of corresponding numerical value change amount minimum is found out in the direction, whenWhen sufficiently smallTend to 0 then should SectionFor straight line；

Step 3：When the variation of a certain section of respective value less than ± 5% and is evenly distributed, this section can be calculated with least square method Average value, the calculating average value are straight line；

Step 4：Write out the straight linear equation of each sensor and its corresponding scope of application；

Step 5：And so on, the linear equation of all the sensors is write out, Simultaneous linear equation is completed；

Step 6：It is calculated according to Simultaneous linear equation, removes approximate, linear equation that is repeating and corresponding sensor, The characteristics of finally linear equation and number of probes of the determining supporting point, the linear equation is that used sensor is minimum , circuit it is simplest.