CN2272579Y

CN2272579Y - Intelligent testing machine for particle

Info

Publication number: CN2272579Y
Application number: CN 96203125
Authority: CN
Inventors: 于志勇
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-01-21
Filing date: 1996-01-21
Publication date: 1998-01-14
Anticipated expiration: 2006-01-21

Abstract

The utility model relates to an intelligent testing machine for particles, which is a testing device for testing the material strength characteristic of an individual particle. The utility model is widely used for testing the strength of particle material such as plastic, chemical fertilizer, catalyst, molecular sieve, adsorbent, smelting pelletizing, etc. The intelligent testing machine for particles comprises a machine body, a pressure mechanism and a specimen stage arranged in the machine body. The utility model is characterized in that the specimen stage is provided with a pressure sensor, the output terminal of the pressure sensor is connected with a monolithic computer through an operational amplifier and an AD converter, and the monolithic computer is provided with a display device or a printout device. The pressure signal of the particle sample can be obtained by the pressure sensor, the signal is sent to the monolithic computer through the operational amplifier and the AD converter for continuous measurement, and the tested pressure value is displayed or printed by the monolithic computer.

Description

Intelligence granule strength testing machine

Intelligence granule strength testing machine is the checkout equipment of test individual particle strength of materials characteristic, is widely used in the mensuration of granule materials intensity such as plastics, chemical fertilizer, catalyzer, molecular sieve, adsorbent, smelting palletizing.

Existing granule strength testing machine all is made up of body, pressure mechanism, sample stage, and the driving of pressure mechanism is manual, and by mechanical drive pressure or pulling force is delivered to pointer indicator.Mechanical transmission mechanism is huge, mechanism is complicated, and the precision of measurement is low, and dynamic data are record automatically, more can not write down one group of data and calculating automatically, demonstration or printout automatically.The process of exerting pressure, fragmentation that can't the perception sample.Begun to damage in particle sample (as cracking), but when also not pulverizing, the hand of pressurization is not felt, and then continues pressurization, up to pulverizing.The data of measuring are not the pressure that begins to damage, and can not reflect the compressive strength of particle sample preferably, and the precision of measurement is also lower.In addition, the pressure of driving can not be controlled, and applied pressure is not even increase, also influences the precision of measuring, and the data differences of measurement is also bigger.

The purpose of this utility model provides a kind ofly can measure compressive strength more truly, have higher measuring accuracy, and simple, convenient, reliable, the granule strength testing machine that efficiency of measurement is high.

Intelligent granule strength testing machine organism of the present utility model, the pressure mechanism that is loaded on body and sample stage, its design feature is: sample stage is provided with pressure transducer, the pressure transducer output terminal is connected with single-chip microcomputer with AD converter by operational amplifier, and single-chip microcomputer is connected with and shows or print out equipment.When pressure mechanism work, when the particulate samples on the sample stage was exerted pressure, the pressure transducer that is provided with by sample stage was obtained the signal to particulate samples pressure.Signal is delivered to single-chip microcomputer through operational amplifier, AD converter, carries out continuous coverage, and can show or print the force value that records.Because the force value that records can store continuously, relatively, after pressure reached intensity level gradually, particulate samples was by crushing bad time, the force value that records can reduce suddenly, just can determine pressure suddenly the previous force value of minimizing be its intensity level.Because difference is smaller before and after the continuous coverage fast, the force value that records.Simultaneously, can reflect timely and accurately during the crushed damage of particulate samples, determine damaged intensity level exactly.The intensity level of Que Dinging is truer thus, and precision is also than higher.Damaged perception and reflect that correspondingly intensity level all carries out automatically, and can storing accordingly and export, operation is very easy, reliable, the efficiency of measurement height.In order further to improve measuring accuracy and efficient, the control output end of single-chip microcomputer preferably is connected with the driver of pressure mechanism, the situation that the pressure that utilization records changes is come the speed of controlled pressure mechanism operation, pressure mechanism is increased equably to the particulate samples applied pressure, and after the particulate samples breakage, the revolution of controlled pressure mechanism.For the whole measurement of energy all be to carry out under Single-chip Controlling, and can measure one group of particulate samples fast, single-chip microcomputer generally all is connected with keyboard.

Intelligent granule strength testing machine of the present utility model is compared with existing technology, has perception exactly and determines the breakage of particulate samples, and can measure the intensity level of particulate samples breakage more truly, and the ratio of precision of measurement is higher; Measuring operation is more convenient, reliable, and can calculate, and has improved work efficiency greatly.

Accompanying drawing has been represented a kind of intelligent granule strength testing machine of the present utility model.Wherein, Fig. 1 is its structural representation, and Fig. 2 is its circuit block diagram, and Fig. 3 is its flow chart of judging the particulate samples breakage, and Fig. 4 is its circuit theory diagrams.

This intelligent granule strength testing machine organism 1, the pressure mechanism 2 that is loaded on body and sample stage 5.Sample stage is provided with pressure transducer 15, and the pressure transducer output terminal is connected with single-chip microcomputer cpu with AD converter by operational amplifier A v.Single-chip microcomputer is connected with display 6 and printer 8.Single-chip microcomputer also is connected with keyboard 7.Single-chip microcomputer, operational amplifier, AD converter, display, printer, keyboard all are assembled in body.Pressure mechanism by stepper motor with pay the press rods that stepper motor is connected by transmission and constitute.The driver of pressure mechanism is the driving circuit of stepper motor and stepper motor.So the control output end of single-chip microcomputer is connected with the driving circuit of stepper motor.Program shown in Figure 3 is housed in the single-chip microcomputer.Wherein, F1 is the force value that previous moment records; The force value that F2 records for back one constantly; F=F2-F1; F=F1-F2; Be given damage coefficient, promptly F1-F2 just is defined as breakage when more than or equal to this coefficient.Single-chip microcomputer is as the control core, and the work of control each several part moves.In the process of particle tested sample, the operation of Single-chip Controlling stepper motor increases the particulate samples applied pressure more equably by press rods.Pressure transducer changes pressure signal into electric signal.Electric signal is through amplifying, after delivering to AD converter (digital to analog converter) and converting digital signal to, sending into single-chip microcomputer handles decoding, stores, one the tunnel send display to show, one tunnel driving circuit through the control output end of single-chip microcomputer output control step motor, its rotating and speed are controlled in the operation of control step motor.Single-chip microcomputer moves simultaneously judges damaged program, the force value F1 of force value F2 that newly records and previous moment relatively, judges whether tested particulate samples is damaged.When F2-F1 greater than zero and F1-F2 during more than or equal to given damage coefficient, promptly be the particulate samples breakage, this F1 is defined as damaged intensity level, and output print.Single-chip Controlling stepper motor revolution simultaneously, press rods rises, the measurement that preparation is next.If carried out the measurement of one group of particulate samples, not only show and print one group intensity level, can also calculate their mean value and show and print with single-chip microcomputer.

Claims

1, intelligent granule strength testing machine organism, the pressure mechanism that is loaded on body and sample stage, it is characterized in that: sample stage is provided with pressure transducer, the pressure transducer output terminal is connected with single-chip microcomputer with AD converter by operational amplifier, and single-chip microcomputer is connected with and shows or print out equipment.

2, as the said intelligent granule strength testing machine of claim 1, it is characterized in that: the control output end of single-chip microcomputer is connected with the driver of pressure mechanism.

3, as the said intelligent granule strength testing machine of claim 2, it is characterized in that: single-chip microcomputer is connected with keyboard.

4, as claim 1 or 2 or 3 said intelligent granule strength testing machines, it is characterized in that: pressure mechanism is made of with the press rods that is connected with stepper motor by transmission stepper motor.

5, as the said intelligent granule strength testing machine of claim 4, it is characterized in that: the control output end of single-chip microcomputer is connected with the driving circuit of stepper motor.