CN86207608U - Tester with multiple functions - Google Patents
Tester with multiple functions Download PDFInfo
- Publication number
- CN86207608U CN86207608U CN 86207608 CN86207608U CN86207608U CN 86207608 U CN86207608 U CN 86207608U CN 86207608 CN86207608 CN 86207608 CN 86207608 U CN86207608 U CN 86207608U CN 86207608 U CN86207608 U CN 86207608U
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- tester
- circuit
- eprom
- test
- counting
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Abstract
The utility model relates to a small-size intellectualized tester with multiple functions for experiment of engineering machinery and tractor, integrating main parts including a microprocessor and a corresponding interface, a memorizer, and a control unit with a dynamic after-change meter, V/F transformation, a counting time-base circuit, a display circuit, single-chip microprocessor, and a control unit. The tester with multiple functions can test different engineering machinery by changing the EPROM which has a specific solid state software. The tester is provided with six digital input passages and four repeated analog input channels and can test and read six different parameters simultaneously. The partial arithmetic result is displayed or printed at the same time.
Description
The present utility model relates to a kind of tractor or engineer machinery test multifunctional intelligent testing tool of being used for.
All be to need more manpower in the past in the test of making tractor or other engineering machinery, various indexs were measured respectively.Labour intensity is big, and measuring accuracy is low, is difficult to satisfy the requirement of multiparameter synchro measure.Middle nineteen seventies, it is main and based on the comprehensive tester with simple data computing of integrated circuit (IC)-components the discrete component transistor successively having occurred adopting in China.As: the NZS-1 agricultural machinery comprehensive tester of the common development of China Academy of Agriculture Mechanization and East China Electronics Co., Ltd instrument plant etc.But the use limitation that above-mentioned development has is big, performance is perfect inadequately, and the price that has higher being unfavorable for promotes.Enter the eighties, domestic indivedual R﹠D institutions and producer also adopt the multifunctional tester of microprocessor new technology in development.Problems such as but it is bad all to exist versatility as a whole, and indivedual technical indicators are not high.Simultaneously, yet there are no on the market abroad fairly perfect with the car comprehensive test device.
Task of the present utility model is: provide a kind of based on microprocessor and the corresponding interface device thereof, adopt high precision integrated transporting discharging, V/F conversion, counting time base circuit, display circuit, be modernized new technologies such as the processor of core and control module with Z-80CPu, form the multi-functional tester of a kind of small portable.The characteristics of this tester are that versatility is strong.Not only be used for the test of tractor, also can be used for test as engineering machinery such as automobiles.When being used for the tractor-drawn performance test, mix respective sensor, and preset the equivalent coefficient of each input quantity, can directly read tractive force, fuel consumption per hour, pace, rotating speed, adaptability to changes by toggle switch on the panel.And calculate the necessary traction power of tractor-drawn performance curve, oil consumption rate and the rate of skidding of drawing simultaneously by above measured value.Above-mentioned each data can show or the automatic record of external printer by the light-emitting diode display on the panel.If will carry out performance analysis or monitor the tractor load the analog quantity input signal, this tester also be provided with the respective channel interface that oscillograph or voltage table can be received on the instrument panel.
Describe particular content of the present utility model in detail below in conjunction with accompanying drawing.
One, four passage high-precision low-drift analog signal amplifiers is arranged in the analog board, four V-F change-over circuits independently.When testing, the analog voltage signal of importing is amplified, after the V-F conversion, become the pulsed quantity that frequency is directly proportional with input signal.After level conversion, photoelectricity coupling and shaping, deliver to the counting channel interface again.Accompanying drawing 2 is the circuit block diagram of one of them passage in this tester breadboarded circuit.
Two, the digiboard of this tester is to be that core is equipped with corresponding memory, decoding scheme and interface with Z80-ACPu, forms the special processing purpose board machine.Memory size is that the RAM of 6K and the EPROM of 10K are used for depositing watchdog routine and the data that collect.Simultaneously for adapting to multiple different purposes, for the further exploitation of this tester lays the first stone, this tester has more rich interface circuit.Comprise that 3 8255(are at present as order input, demonstration, coefficient settings interface); A slice PIO interface (at present as printer interface); Two CTC(are at present as data acquisition and time base circuit).Also have serial communication interface SI0,8 road A/D change-over circuit ADC0809,8 d type flip flop 74LS273 chips in addition on the digiboard.Accompanying drawing 3 is this tester digiboard circuit block diagram.
Remove the above, the utility model has also been taked following technical measures.
1. be furnished with the EPROM programmable read only memory in this tester machine, be used to store special-purpose solidification software, and be provided with special slot.By developing different software, can realize multiple measurement, computing and control function to different testing engineering machineries, increased the versatility and the versatility of this tester greatly.This tester is furnished with the solidification software that is exclusively used in the tractor-drawn performance test at random.
2. be that the inferior and simplification circuit of retaining is regularly measured in range extension, increase, this tester has adopted two Z80 counting/timer CTC jointly as counting, the time base circuit of this tester, and its effect is remarkable.Accompanying drawing 4 is the circuit block diagram of time base circuit and counting channel.
3. the input channel of this tester is provided with anti-jamming circuit.Accompanying drawing 5 is its circuit block diagram.This circuit is connected to the input end of CTC, and the feeder line between signal generator and anti-jamming circuit adopts the common plastics twisted-pair feeder.In addition, this tester has been taked cooling measure preferably.
4. the power supply of this tester is direct current 12V, can directly utilize accumulator to do power supply.After the voltage stabilizing and inversion of the voltage stabilizing inverter circuit of 12V power supply in the machine of being located at, respectively formation+5V and ± the 9V power supply is for the use of TTL circuit and linear modules.This outer cage backboard has not power down supply hub, behind the access 6V dry cell, can will exist the total data of the collection in worksite among the RAM to preserve.
According to the foregoings that should use tester, this utility model is just like the lower panel function more.
1. regularly measure and select.Can choose wantonly gate time from 1 second to 99 seconds.Can import RAM gate time with dial.After the startup, six channel data synchronous acquisition arrived up to the time, and six passages stop counting simultaneously.
2. spacing 1 is measured.Measuring distance is optional from 1 meter to 9999 meters.Distance can be imported RAM by toggle switch equally.
3. spacing 2 is measured.Starting point and the terminal point measured set in advance mark post.Start working, when entering starting point, press for the first time to start and measure button.Press same button when reaching home for the second time, counting channel is started synchronously and stops.
4. coefficient settings.Being furnished with toggle switch on panel carries out coefficient to each counting channel and presets.Coefficient settings scope from 0.0001 to 9.9999.
5. Presentation Function.Panel has six bit data and shows, but display channel number and data.The video data while, the corresponding unit of panel shows lumination of light emitting diode, represents the unit of shown data.
6. calibrate and demarcate selector switch.Calibration function (comprising the self-correcting function) can carry out the enlargement factor calibration to the amplifier of four analog channels.Calibrating function can be demarcated respectively the sensor that inserts each passage, for coefficient selection before formal the measurement obtains reliable basis.
7. panel is provided with the analog quantity output plughole, provides preparation for inserting oscillograph.
8. also be provided with on the panel reset, initial value, reading, measurement button and amplifier is regulated, the bridge balance potentiometer knob.
According to the foregoings that should use tester, the backboard of this utility model has following function more.
1. have five signal input sockets.But wherein but label is 1,2,3,4 passage not only input analog amount but also input digit amount.And by corresponding K switch
1-K
4Select.Label 5-6 passage is the digital quantity input channel.
2. have two output interfaces.Wherein interface 2 is a printer interface.
3. be equipped with outlet.
4. sound equipment socket.
Accompanying drawing 6,7 is respectively the panel figure and the backboard figure of this tester.
Embodiment of the present utility model is as follows:
One, frequency response:
1. digital quantity input: 5 hertz～10 kilo hertzs
2. analog quantity input: 0～50 hertz
Two, input signal amplitude
1. digital quantity input: 2 volts～10 volts
2. analog quantity input: 20 microvolts～50 millivolt
Three, error
1. digital quantity input: ± 1 word
2. the analog quantity linearity:＜0.5%
Four, stream time: eight hours
Five, working temperature: 0～40 ℃
Six, display mode: LED shows or printer record
Seven, power supply mode: direct current+12 volt
Eight, Overall Power Consumption:＜20 watts
Nine, working current:＜2 peaces
Ten, physical dimension: 340 * 350 * 10(long measure: millimeter)
This tester model machine is tested through many-side, has reached Expected Results fully.
Owing to adopted MPU hardware and software engineering, so that whole instrument has that volume is little, in light weight, reliability is strong, anti-seismic performance good and the characteristics such as easy to use, be convenient to very much the user and carry and be directly installed on the mobile operation machine and test.
Claims (5)
1, a kind ofly form the tester that is used for engineer machinery test and tractor test of one, it is characterized in that by microprocessor and control module, storer, IO interface, high precision integrated transporting discharging, V/F conversion, counting time base circuit, warning circuit, display circuit, printer interface circuit:
(1) storer is that RAM and EPROM form, and wherein EPROM is used for storing special-purpose solidification software, and can carry out the whole plug-in unit of EPROM according to different engineering machinery and change;
(2) input channel of tester is divided into two kinds of digital quantity input channel and analog input channels.
2, tester according to claim 1 is characterized in that above-mentioned each passage all adopts high-precision low-drift integrated operational amplifier, level conversion, voltage follower, photoelectricity coupling, shaping technique.
3, tester according to claim 1 and 2 is characterized in that counting time base circuit and adopts two Z80 counting/timer CTC.
4, according to claim 1 or 2 or 3 described testers, it is characterized in that being equipped with on the tester panel and be used for demarcating, establish number, when establishing, establish the coefficient setting device of distance.
5, according to claim 1 or 2 or 3 or 4 described testers, it is characterized in that being equipped with on the tester panel analog quantity output plughole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86207608 CN86207608U (en) | 1986-10-29 | 1986-10-29 | Tester with multiple functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 86207608 CN86207608U (en) | 1986-10-29 | 1986-10-29 | Tester with multiple functions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN86207608U true CN86207608U (en) | 1987-09-02 |
Family
ID=4809998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 86207608 Withdrawn CN86207608U (en) | 1986-10-29 | 1986-10-29 | Tester with multiple functions |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN86207608U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101517353B (en) * | 2005-09-23 | 2012-09-05 | 维洛科公司 | Apparatus for measuring total force in opposition to a moving vehicle and method of using |
-
1986
- 1986-10-29 CN CN 86207608 patent/CN86207608U/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101517353B (en) * | 2005-09-23 | 2012-09-05 | 维洛科公司 | Apparatus for measuring total force in opposition to a moving vehicle and method of using |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| CU03 | Correction of utility model patent gazette |
Correction item: Designer Correct: Wang Maohua|Chang Hua|Liu Chengqi|Zhang Guangjie|Wang Ku|Wang Yiming|Cao Keshi|Zhao Ning False: Wang Maohua|Chang Hua|Liu Chengqi|Zhang Guangjie|Wang Ku|Wang Yiming|Cao Guangshi|Zhao Ning Number: 35 Page: 47 Volume: 3 |
|
| 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 |