The scale frame structure of the electronic belt scale bearing device mainly includes four types: double lever multi-idler, single idler, cantilever and suspension. The double lever and multi-idler suspension weighbridge electronic belt weighbridge has a long metering section, generally 2-8 sets of idlers, with high metering accuracy, and is suitable for places with large flow and high metering accuracy requirements. The belt speed of electronic belt scale with single roller cantilever scale frame can be determined by the manufacturer, which is suitable for places with small flow or places where flow and batching are controlled.
Roller belt scale consists of gravity transmission system, roller, counter and speed dial (Figure 1). The speed of the speed disk is proportional to the belt speed. The angular velocity of the roller is proportional to the amount of material passing through the conveyor belt. The position of the drum on the speed disk is adjusted by the gravity of the material. When there is no material on the belt, the drum is close to the center of the speed plate, the rotation speed is zero, and the counter does not accumulate; When there is material on the belt, the roller moves to the periphery with the increase of gravity, and drives the counter to record the total amount of material passing through the belt. The electronic belt scale consists of a steel mechanical scale frame, a speed measuring sensor, a high-precision weight measuring sensor and an electronic belt scale control display instrument (Figure 2), which can continuously and dynamically measure solid materials.
When weighing, the load-bearing device transfers the gravity of the material on the belt to the weighing sensor, and the weighing sensor outputs a voltage (mV) signal proportional to the gravity of the material, which is amplified by the amplifier and sent to the A/D converter to be converted into a digital quantity, and then sent to the arithmetic unit; After the material speed is input into the speed sensor, the speed sensor outputs the pulse number b and sends it to the arithmetic unit; After the operator operates A and B, the quantity of materials in this metering cycle is obtained. Accumulate each measurement period to obtain the total amount of materials passing through the conveyor belt continuously.
Weighing display mainly includes digital display and Chinese character display, which is an upgraded product of digital display. The weighing display has the functions of cumulative and instantaneous flow display, automatic zero adjustment, semi-automatic zero adjustment, self-check fault, digital calibration, flow control, printing and so on. Chinese character display can also display speed. Chinese character display has function display during operation, which can better help users to operate. TTS series electronic belt weighers are a series of new electronic belt weighers developed on the basis of the project "New weighing control display based on fuzzy neural network technology".
TTS series electronic belt weigher applies three technologies of distribution, integration and database to belt weigher products for the first time, and is dubbed as "three technical scales" by experts.
TTS series new electronic belt weigher products adopt the principle of modeling and measurement, and the multi-parameter information fusion technology of belt weigher makes up for the inherent defect of using "single sensor", and distributes multiple sensors at different characteristic points of belt conveyor to form a multi-sensor information perception system from a geographical point of view; Using database technology to quantitatively reflect the state of weighing system from the perspective of time domain. TTS electronic belt weigher has thoroughly solved the long-standing common problems of belt weigher, such as high accuracy, stability and high maintenance cost, from two aspects: the metering performance of belt weigher itself and the environmental applicability of belt weigher.
The multi-parameter information fusion technology of belt weigher is realized by using fuzzy neural network technology. The weighing display controller based on fuzzy neural network adopts fuzzy neural network with four-layer structure of input, fuzzification, reasoning and non-fuzzification. By learning the existing typical data, the neural network can summarize the rules, thus achieving satisfactory fusion effect. Based on the research of belt weigher for more than 20 years, a brand-new error theory of belt weigher is put forward through a lot of experiments, and the latest product "array belt weigher" is developed, which has been successfully applied to the trade measurement of belt transportation, and has achieved excellent results of high precision, high long-term stability and extremely low daily maintenance, which has made revolutionary progress in belt weigher technology! High precision belt weigher.
Patent technology
First, the array belt scale
The weighing array belt scale composed of several groups of specific weighing units in series can eliminate the influence of belt tension and greatly improve the weighing accuracy of the belt scale by processing the array data.
Second, the single-point suspension weighing platform
A new weighing device: one weighing sensor supports more than two groups of weighing rollers, which has ingenious structure, high weighing accuracy and excellent stability, and does not need daily maintenance.
Three. I-shaped single-point weighing sensor
The special sensor for single-point suspension weighing platform has the characteristics of unique structure, high weighing accuracy and strong resistance to horizontal force interference.
Application occasion
I. Measurement of trade settlement of import and export bulk materials at ports
2. Measurement of coal trading in power plants
3. Measurement of bulk raw fuel in iron and steel plant and settlement between branches
4. Measurement of ex-factory materials trade in various mines
5. Measurement of various bulk materials during transportation.