CN2249408Y - Compression strength detector for brittle granular material - Google Patents
Compression strength detector for brittle granular material Download PDFInfo
- Publication number
- CN2249408Y CN2249408Y CN 95223796 CN95223796U CN2249408Y CN 2249408 Y CN2249408 Y CN 2249408Y CN 95223796 CN95223796 CN 95223796 CN 95223796 U CN95223796 U CN 95223796U CN 2249408 Y CN2249408 Y CN 2249408Y
- Authority
- CN
- China
- Prior art keywords
- voltage
- circuit
- triode
- capacitor
- input end
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model relates to a compression strength detector for brittle granular material, which is characterized in that a pressure peak checking and locking circuit is formed by the connection of a voltage comparator IC4, a voltage follower IC5, triodes BG1, BG2, a diode, a resistor R7, a capacitor C2, and switches K1, K2, wherein, the positive input terminal of the voltage follower IC5 and the negative input terminal of the voltage comparator IC4 are connected with the output terminal of a voltage amplifier in parallel; the negative input terminal of the voltage follower IC5, the positive input terminal of the voltage comparator IC4, the positive electrode of the capacitor C2, and the emitting electrode of the triode BG1 are connected with the input terminal of an analogue-digital conversion circuit. The utility model can detect and latch pressure peak; the sample anti-pressure value can be displayed digitally. The utility model has the advantages of simple structure and small size; the weight of the utility model is only 1.5KG, and the cost of the utility model is lowered by 50%. The utility model is suitable for being used as a portable compressive strength on-site detector.
Description
The utility model brittle particle material compressive strength determination instrument belongs to material property detection technique field.
Brittle particle materials such as adamas have a series of excellent properties, use very extensively, and compressive strength is to weigh an important indicator of its product quality, so that compressive strength detects its scientific research, production, operation, use department is all significant.Chinese patent CN2090528U has proposed a kind of diamond intensity auto testing instrument, it partly is made up of mechanical load mechanism, pressure transducer, instrument amplifier, A/D converter, single-chip microcomputer, storer and digital display, the voltage signal that the pressure effect causes becomes digital signal by A/D converter after amplifying, import single-chip microcomputer again and demonstrate individual particle compressive strength or STATISTICAL STRENGTH value by charactron after predetermined software processes.This instrument efficient height is fit to the laboratory and uses, but its complex structure, volume is big, price is high, is unsuitable for the on-the-spot needs that detect in the frequent production and operating activities.
The utility model is intended to retrofit testing instrument structure, provides a kind of and is easy to carry and low-cost brittle particle material compressive strength determination instrument, to satisfy on-the-spot pressing for of detecting in the production and operation.
For this reason, the utility model brittle particle material compressive strength determination instrument has mechanical pressing mechanism, pressure transducer, voltage amplifier, A/D analog to digital conversion circuit and digital display circuit, its principal character is: be provided with pressure peak inspection lock circuit between voltage amplifier and A/D analog to digital conversion circuit, detecting and to latch pressure peak, and this circuit is by voltage comparator ic
4, voltage follower IC
5, triode BG
1And BG
2, diode, resistance R
7, capacitor C
2And K switch
1, K
2Be formed by connecting, wherein voltage follower IC
5"+" to input end and voltage comparator ic
4"-" be parallel to the voltage amplifier output terminal to input end, voltage follower IC
5"-" to input end, voltage comparator ic
4"+" to input end, capacitor C
2Positive pole and triode BG
1Emitter be parallel to the input end of A/D analog to digital conversion circuit, triode BG
1Base stage and the collector short circuit after be connected in voltage follower IC
5Output terminal, and its emitter passes through capacitor C
2Ground connection, voltage comparator ic
4Output terminal by diode and resistance R
7Meet triode BG
2Base stage, triode BG
2Collector connect the analog to digital conversion circuit input end, its emitter is ground connection then, capacitor C
2Be associated with K switch between two ends
1, triode BG
2Be in series with resistance R between emitter and base stage
7With K switch
2Other characteristics are: the resistance R of pressure peak inspection lock circuit
7=2～10K Ω, capacitor C
2=20～100 μ F, the chip IC of A/D analog to digital conversion circuit
1Be 14433 types.
In fact, the utility model internal measuring instrument has mechanical pressing mechanism, pressure transducer (5), voltage amplifier, pressure peak inspection lock circuit, A/D analog to digital conversion circuit and digital display circuit (Fig. 1).The machinery pressing mechanism can adopt versions such as miniature screw press, rack-and-pinion pressurization, lever pressurization, but its full-size is less than 20CM, the most handy lever pressing mechanism.Pressure transducer (5) has the ordinary construction pattern, and its output terminal is connected (Fig. 2) with the voltage amplifier input end, can make suffered mechanical pressure change voltage signal V into
1And input voltage amplifier.Voltage amplifier, A/D analog to digital conversion circuit and digital display circuit all have corresponding ordinary construction pattern.The voltage amplifier output terminal is connected in pressure peak inspection lock circuit input end, can make voltage signal V
1Be enlarged into V
2The A/D analog to digital conversion circuit can carry out analog to digital conversion to the voltage signal by the input of pressure peak inspection lock circuit, and its output terminal is connected in digital display circuit input end, chip IC
1Can adopt 14433 types or 7135 types, the most handy 14433 types are to simplify circuit.Digital display circuit can adopt charactron or liquid crystal to make the digital display element, and the input signal digital display is come out.Pressure peak inspection lock circuit is by voltage comparator ic
4, voltage follower IC
5, triode BG
1And BG
2, diode, resistance R
7, capacitor C
2And K switch
1, K
2Be formed by connecting (Fig. 2), wherein: R
7=2～10K Ω, C
2=20～100 μ F, voltage follower IC
5"+" to input end and voltage comparator ic
4"-" be parallel to the voltage amplifier output terminal to input end, voltage follower IC
5"-" to input end, voltage comparator ic
4"+" to input end, capacitor C
2Positive pole and triode BG
1Emitter be parallel to the input end of A/D analog to digital conversion circuit, triode BG
1Base stage and the collector short circuit after be connected in voltage follower IC
5Output terminal, and its emitter passes through capacitor C
2Ground connection, voltage comparator ic
4Output terminal by diode and resistance R
7Meet triode BG
2Base stage, triode BG
2Collector connect the analog to digital conversion circuit input end, its emitter is ground connection then, capacitor C is associated with K switch between 2 two ends
1, triode BG
2Be in series with resistance R between emitter and base stage
7With K switch
2Triode BG
1Can prevent capacitor C
2Back discharge is gone back and C
2Constitute an integrating circuit, can play time-lag action.K
2Being keyswitch, is display key, when being in closure state, and triode BG
2Current collection high level very, chip IC
1Carry out analog to digital conversion; K
2After the disconnection, BG
2Be controlled by voltage comparator ic
4, control according to voltage peak.Keyswitch K
1Be reset key, during disconnection, capacitor C
2Charging, the circuit operate as normal; When closed, C
2Discharge shows null value.Display (8), pilot lamp (9), display key (10), power switch (11) are installed in the casing (7) that is fixed in pedestal (6) and go up (Fig. 3).When detecting compressive strength, open switch (11), energized; A test portion (3) is placed on the instrument push-down head anvil face; Press reset key K
1, make display (8) show 0.00; Make pressing mechanism drive seaming chuck (2) then and constantly increase trying the pressure P of grain, this power P becomes voltage signal V after acting on pressure transducer (5) by push-down head (4)
1V
1The input voltage amplifier is enlarged into voltage V
2V
2Directly act on voltage comparator 1C
4"-" to input end and voltage follower IC
5"+" to input end, pass through IC
5And BG
1To capacitor C
2Charging is at C
2Two ends obtain voltage V
2'.Constantly increase V with putting forth effort P
1And V
2Increase V synchronously
2' also increase thereupon, but slightly lag behind, so before the examination grain is subjected to the peak load fragmentation, V
2＞V
2', comparer IC
4Output terminal is a low level, K
2Be in closure state, BG
2Not conducting, A/D modulus conversion chip IC
1Pin 9 be high level, carry out analog to digital conversion continuously, the input digit display circuit shows that the pressure P value constantly increases.Up to the broken moment of examination grain pressurized, the P value subtracts suddenly, V
1, V
2Value also falls sharply synchronously.V this moment
2＜V
2', voltage comparator ic
4Output terminal becomes high level, triode BG
2Conducting makes IC
1Pin 9 ground connection, become low level by high level, this just makes pressure peak obtain detecting, latch and show.So just measured the compressive strength of an examination grain, i.e. the anti-static pressure of individual particle (when slowly pressurizeing) or (when impacting pressurization) shock proof peak load.Survey the compressive strength of 40 examination grains of record by above-mentioned same program after, promptly can be regarded as the statistics compressive strength of this test portion.Utilize three kinds of intensity Buddha's warrior attendant masonry test portions, make the contrast test shows on this analyzer and platform balance formula static pressure instrument: measurement result is very consistent.
Therefore, this analyzer compared with prior art has following advantage: dimensions of mechanical structures is little, in light weight, electric part is realized detecting, latching of voltage peak with pressure peak inspection lock circuit, avoided prior art to utilize software to realize the needed complicated circuit system of inspection lock with single-chip microcomputer, so simple in structure, size is approximately little by 75%, weight light approximately 80%, cost is low approximately by 50%, is easy to carry, and is fit to on-the-spot detection of fragility pellet compressive strength and uses.
Fig. 1 is the structured flowchart of the utility model analyzer.
Fig. 2 is the circuit theory diagrams of analyzer shown in Figure 1.
Fig. 3 is the outside drawing of the utility model analyzer.
Embodiment: brittle particle material compressive strength determination instrument is installed be formed by connecting (Fig. 1) by lever pressing mechanism, pressure transducer (5), voltage amplifier, pressure peak inspection lock circuit, A/D analog to digital conversion circuit and digital display circuit.The lever pressing mechanism has pedestal (6), be hinged on depression bar (1) on the pedestal, be fixed in depression bar (1) seaming chuck (2), be fixed in the pressure transducer (5) of pedestal and under seaming chuck, be flat on the push-down head (4) of sensor upper surface, seaming chuck (2) and push-down head (4) are by the wimet manufacturing.The long 19CM of depression bar (1) is being subjected to the P masterpiece time spent, can rotate around hinge, and to be measured the material (3) that is put in the push-down head end face slowly exerted pressure or impact pressurization with seaming chuck (2).Pressure transducer (5) is a resistance strain-gauge transducer, can change suffered mechanical pressure into voltage signal V
1, and by its output terminal input voltage amplifier.Voltage amplifier, A/D analog to digital conversion circuit and digital display circuit all have corresponding ordinary construction pattern.The voltage amplifier input end is connected in the pressure transducer output terminal, and its output terminal is connected in the input end of pressure peak inspection lock circuit.Pressure peak inspection lock circuit is by TL062 type voltage comparator ic
4With voltage follower IC
5, 9013 type triode BG
1With BG
2, 4148 type diode, R=5K Ω resistance R
7, C=50 μ F capacitor C
2With keyswitch K
1, K
2Be formed by connecting (Fig. 2), its input end is connected in the voltage amplifier output terminal, two then corresponding A/D analog to digital conversion circuit chip IC that are connected in of output terminal
1Pin 3,9 and R
10Triode BG
1Can prevent capacitor C
2Back discharge is gone back and C
2Constitute an integrating circuit, can play time-lag action.Keyswitch K
1Be reset key, during disconnection, C
2Charging, the circuit operate as normal; When closed, C
2Discharge shows null value.K
2Be display key, when closed, BG
2Current collection high level very, chip IC
1Carry out analog to digital conversion; During disconnection, BG
2Be controlled by IC
4, control according to voltage peak.The A/D analog to digital conversion circuit adopts 14433 cake core IC
1, can make analog to digital conversion to the defeated next voltage signal of inspection lock circuit, import the digital display circuit that is connected with its output terminal then.Digital display circuit adopts charactron to make display element.By the compressive strength of aforementioned program determination brittle particle, as long as moulded rod (1) under slow or the impact just can make examination grain (3) be subjected to static pressure or surge pressure effect, these acting forces P passes to pressure transducer (5) quilt by push-down head (4) and is changed into voltage signal V
1, and then the input voltage amplifier is enlarged into V
2, input pressure peak value inspection lock circuit is realized detecting and latching of crest voltage then, imports the A/D analog to digital conversion circuit then and changes digital signal into, is demonstrated the anti-static pressure or the impact strength of this test portion at last by the charactron of digital display circuit.Various adamas test portions are carried out isostatic pressing strength mensuration show that the apparent value error of this analyzer is no more than 1N, can satisfy the commercial Application needs fully.This instrument size is 20 * 10 * 4CM only, the about 1.5KG of weight, and 50% of the about platform balance formula of cost static pressure instrument, use is detected at the scene that is particularly suitable for various brittle particle material compressive strength.
Claims (2)
1. brittle particle material compressive strength determination instrument, have mechanical pressing mechanism, pressure transducer, voltage amplifier, A/D analog to digital conversion circuit and digital display circuit, it is characterized in that: between voltage amplifier and A/D analog to digital conversion circuit, be provided with pressure peak inspection lock circuit, detecting and to latch pressure peak, and this circuit is by voltage comparator ic
4, voltage follower IC
5, triode BG
1, BG
2, diode, resistance R
7, capacitor C
2And K switch
1, K
2Be formed by connecting, wherein voltage follower IC
5"+" to input end and voltage comparator ic
4"-" be parallel to the voltage amplifier output terminal to input end, voltage follower IC
5"-" to input end, voltage comparator ic
4"+" to input end, capacitor C
2Positive pole and triode BG
1Emitter be parallel to the input end of A/D analog to digital conversion circuit, triode BG
1Base stage and the collector short circuit after be connected in voltage follower IC
5Output terminal, and its emitter passes through capacitor C
2Ground connection, voltage comparator ic
4Output terminal by diode and resistance R
7Meet triode BG
2Base stage, triode BG
2Collector connect the analog to digital conversion circuit input end, its emitter is ground connection then, capacitor C
2Be associated with K switch between two ends
1, triode BG
2Be in series with resistance R between emitter and base stage
7With K switch
2
2. the analyzer according to claim 1, its characteristics are: the resistance R of pressure peak inspection lock circuit
7=2～10K Ω, capacitor C
2=20～100 μ F, the chip IC of A/D analog to digital conversion circuit
1Be 14433 types.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95223796 CN2249408Y (en) | 1995-10-09 | 1995-10-09 | Compression strength detector for brittle granular material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95223796 CN2249408Y (en) | 1995-10-09 | 1995-10-09 | Compression strength detector for brittle granular material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2249408Y true CN2249408Y (en) | 1997-03-12 |
Family
ID=33870748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95223796 Expired - Fee Related CN2249408Y (en) | 1995-10-09 | 1995-10-09 | Compression strength detector for brittle granular material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2249408Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103398898A (en) * | 2013-08-16 | 2013-11-20 | 常熟市苏常工程质量检测有限公司 | Anti-pressure testing device |
| CN108398322A (en) * | 2018-01-30 | 2018-08-14 | 南京理工大学 | The contact force measurement experiment device and its experimental method of granular materials pressurization experiment |
| CN109932125A (en) * | 2017-12-15 | 2019-06-25 | 核工业北京地质研究院 | A kind of pressure sensor calibrating method based on pressure versus time variation relation |
-
1995
- 1995-10-09 CN CN 95223796 patent/CN2249408Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103398898A (en) * | 2013-08-16 | 2013-11-20 | 常熟市苏常工程质量检测有限公司 | Anti-pressure testing device |
| CN109932125A (en) * | 2017-12-15 | 2019-06-25 | 核工业北京地质研究院 | A kind of pressure sensor calibrating method based on pressure versus time variation relation |
| CN108398322A (en) * | 2018-01-30 | 2018-08-14 | 南京理工大学 | The contact force measurement experiment device and its experimental method of granular materials pressurization experiment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2249408Y (en) | Compression strength detector for brittle granular material | |
| CN201193968Y (en) | Mining pressure sensor calibrating apparatus | |
| CN201159670Y (en) | Starting device for starting electronic scale and automatically starting electronic scale | |
| CN111289229A (en) | Spring high-temperature characteristic and fatigue testing machine equipment | |
| CN208432329U (en) | A kind of detection of electrons scale counted for the weighing of electric power line steel tower bolt nut | |
| CN201617315U (en) | Carrying handle with weighing function | |
| CN212531864U (en) | Elevator weighing device | |
| CN210400708U (en) | Digital display force measuring ring coefficient calibration device | |
| CN110411332A (en) | A kind of system and method for test resistance gauge factor | |
| CN2272579Y (en) | Intelligent testing machine for particle | |
| CN219015369U (en) | Pressure switch contact voltage drop and trigger size testing device | |
| KR200312926Y1 (en) | Digital Pressure Gauge | |
| CN221224395U (en) | High detection device of security | |
| CN213842492U (en) | Intelligent dynamometer | |
| CN2081528U (en) | Machinery and electronic two-purpose balance | |
| CN2238176Y (en) | Electronic electric point power measuring cranking bar | |
| CN210375385U (en) | Electronic scale circuit and electronic scale | |
| CN210802680U (en) | Electronic ink screen electronic scale | |
| CN101074009B (en) | Tyre digital gas-filling meter | |
| CN220251060U (en) | Anti-drop's instrument and meter detection device | |
| CN2578783Y (en) | Strain electronic dial gauge | |
| CN2083290U (en) | Chattock gauge | |
| CN217786400U (en) | Wireless dynamometer | |
| CN2059237U (en) | Double face digit display electronic steelyard | |
| CN2281528Y (en) | Simple determiner for compression strength |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |