CN2210510Y - Intelligent milliampere stopwatch - Google Patents
Intelligent milliampere stopwatch Download PDFInfo
- Publication number
- CN2210510Y CN2210510Y CN 94219925 CN94219925U CN2210510Y CN 2210510 Y CN2210510 Y CN 2210510Y CN 94219925 CN94219925 CN 94219925 CN 94219925 U CN94219925 U CN 94219925U CN 2210510 Y CN2210510 Y CN 2210510Y
- Authority
- CN
- China
- Prior art keywords
- data
- pin
- analog
- output
- connects
- 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
- 238000006243 chemical reaction Methods 0.000 claims abstract description 9
- 239000003990 capacitor Substances 0.000 claims abstract description 8
- 238000013500 data storage Methods 0.000 claims description 12
- 238000001514 detection method Methods 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000010354 integration Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
Images
Landscapes
- Measurement Of Unknown Time Intervals (AREA)
Abstract
The milliampere stopwatch for maintaining medical X-ray equipment consists of casing, integrator 1, A/D converter 3, display 4 and single-chip microcomputer circuit. Wherein: the integrating capacitor of the integrator 1 is connected with the analog switch 2 in parallel, the output of the integrator 1 is connected with the analog signal input end of the analog-to-digital converter 3, the data output port and the conversion ending output pin of the integrator are respectively connected with the data input port and the detection input pin of the single-chip microcomputer circuit, the data output port of the single-chip microcomputer circuit is connected with the display, and the two control pins are respectively connected with the control end of the analog switch 2 and the starting conversion pin of the analog-to-digital converter. It can continuously measure, store and display mAs values of X-ray devices.
Description
The utility model relates to a kind of milliampere stopwatch that is used to keep in repair medical X-ray equipment, belongs to the medical equipment field.
Medical X-ray equipment is the requisite equipments of all kinds of hospitals, and the product of its tube current and time-milliampere-second value (mAs value), it is one of main performance index of x-ray generator, the size of mAs value directly influences image quality, so the mAs value plays an important role in debugging and maintenance X line equipment.The mAs table of seeing is in the market realized in order to following method:
1. magneto-electric impulse current table
2. current integration is obtained the magnitude of voltage be directly proportional with the mAs value
3. after electric current charges to electric capacity, measure capacitor discharge time
1st, 2 two kinds of methods need manually make the mAs table reset, and the 3rd kind of method wait capacitor discharge wanted the long period.Above method can only realize single measurement, single demonstration, no continuous measurement and data storage function, can not satisfy the needs of real work.
But the purpose of this utility model provides a kind of continuous measurement, has the milliampere stopwatch of storage and Presentation Function.
The purpose of this utility model is achieved in that intelligent milliampere stopwatch is made up of shell, integrator, single chip microcomputer circuit, analog to digital converter and display.Wherein: the integrating capacitor of said integrator also connects analog switch, the output of integrator connects the input end of analog signal of said analog to digital converter, the data output of analog to digital converter and EOC output pin connect the data input port of said single chip microcomputer circuit respectively and detect input pin, the data output of single chip microcomputer circuit connects said display, and two control pins of single chip microcomputer circuit connect the control end of analog switch and the startup conversion pin of analog to digital converter respectively.
Single-chip microcomputer in the single chip microcomputer circuit is coordinated the work of each several part, and integrator carries out integration to tube current, and analog to digital converter converts the output of integrator to digital quantity, is gathered by the single chip microcomputer circuit then.After collecting the mAs value, single-chip microcomputer sends signal analog switch is connected at every turn, makes the integrating capacitor discharge, prepares for measuring next mAs value.The mAs value of gathering is then by storing after the single chip microcomputer processing of circuit and sending display to show.
This shows that the utility model can carry out continuous measurement to the mAs value of X line equipment, and have storage and Presentation Function.
Below in conjunction with drawings and Examples the utility model is described in detail.
Fig. 1 is circuit theory diagrams of the present utility model.
This device is made up of shell and circuit shown in Figure 1.This circuit comprise integrator 1 that CD4066 analog switch 2, ADC0801 analog to digital converter 3, four displays 4 that seven segment digital tubes constitutes, amplifier CA3160 constitute and comparator 5, with door 6, and by 8031 single-chip microcomputers, 7,8155 parallel interface chips, 8,138 decoders, 9,2764 program storages 10,2817E
2The single chip microcomputer circuit that PROM data storage 11,373 address latchs 12 and 373 data latches 13 constitute.Wherein:
The data port P0 parallel interface chip 8 of single-chip microcomputer 7, program storage 10, data storage 11 threes' data port and decoder 9, address latch 12, data latches 13 threes' data input port, the ALE pin meets the timer input TMRIN of parallel interface chip 8, the P1.0 pin meets the EOC output pin INTR of analog to digital converter 3, the P1.6 pin connects the control end of analog switch 2, and the P2 mouth connects both high address mouths of program storage 10 and data storage 11.
The PB mouth of parallel interface chip 8 and timer output pin TMROUT connect the digital data delivery outlet and the clock pin of analog to digital converter 3 respectively.Each output of decoder 9 connects program storage 10, data storage 11 and data latches 13 threes' chip select pin respectively.The data output of address latch 12 connects both low address mouths of program storage 10 and data storage 11.The data output of data latches 13 connects the input port of display 4.
The integrating capacitor of analog switch 2 and integrator 1 also connects, the output one tunnel of integrator 1 connects the input end of analog signal of analog to digital converter 3, another road and reference signal add to the input of comparator 5 respectively, the output of comparator 5 connects the input with door 6, with another input termination of door 6 from the P1.4 of single-chip microcomputer 7 pin, connect the startup conversion pin of analog to digital converter 3 with the output of door 6.
Narrate its operation principle below:
Earlier analog switch 2 is connected when this device is started working, treated multiple behind the integrating capacitor discharge off of integrator 1 analog switch to be disconnected, the P1.4 pin of single-chip microcomputer 7 is sent high level then, will open with door 6, makes system be in wait state.
When the input of integrator 1 had the current I input, this electric current charged to integrator, and its output V0 is raise gradually, when V0 surpasses VCCR5/ (R4+R5), comparator 5 output high level, and through delivering to the startup conversion pin of analog to digital converter 3 with door 6, so analog to digital converter is started working.Behind the EOC of analog to digital converter, its EOC output pin INTR output low level.After single-chip microcomputer detects this low level by the P1.0 pin, just the digital data after the conversion is deposited in the internal RAM of parallel interface chip 8 and go.Single-chip microcomputer is exported a pulse again by the P1.4 pin then, starts analog to digital converter, reads in a data after A again.The data of newly reading in are compared with the data in originally being stored in parallel interface chip RAM, preserve the greater.So work is till maximizing.
The mAs value of different data after A correspondences is being deposited in preceding 200 unit in data storage 11, according to the mAs value that the data after the conversion are found out, both can be used for showing, also can deposit other unit of data storage in, with usefulness for future reference.
The utility model is a necessary tool in the control of medical X-ray equipment quality, also is X line maintenance of equipment engineering's teacher indispensable instrument.Its measuring range is 10-1000mAs, certainty of measurement reaches ± and 3%.
Claims (2)
1. intelligent milliampere of stopwatch has shell and integrator (1), it is characterized in that: it also has the single chip microcomputer circuit, analog to digital converter (3) and display (4), wherein: the integrating capacitor of said integrator (1) also connects analog switch (2), the output of integrator (1) connects the input end of analog signal of said analog to digital converter (3), the data output of analog to digital converter (3) and EOC output pin connect the data input port of said single chip microcomputer circuit respectively and detect input pin, the data output of single chip microcomputer circuit connects said display (4), and two control pins of single chip microcomputer circuit connect the control end of analog switch (2) and the startup conversion pin of analog to digital converter (3) respectively.
2. intelligent milliampere of stopwatch according to claim 1, it is characterized in that: it also have comparator (5) and with door (6), said single chip microcomputer circuit is made of single-chip microcomputer (7), parallel interface chip (8), decoder (9), program storage (10), data storage (11), address latch (12) and data latches (13), wherein:
The data port of said single-chip microcomputer (7) connects said parallel interface chip (8), program storage (10), data storage (11) three's data port and said decoder (9), address latch (12), data latches (13) three's data input port, the ALE pin connects the timer input of parallel interface chip (8), the P1.0 pin connects the EOC output pin of said analog to digital converter (3), the P1.6 pin connects the control end of analog switch (2), and the data output of P2 mouth and address latch (12) connects program storage (10) after merging, both address mouths of data storage (11);
The PB mouth of said parallel interface chip (8) and timer output pin connect the data output and the clock pin of said analog to digital converter (3) respectively;
Each output of said decoder (9) connects said program storage (10), data storage (11) and data latches (13) three's chip select pin respectively;
The data output of said data latches (13) connects the input port of said display (4);
The output of said integrator (1) and reference signal add to the input of said comparator (5) respectively, the output of comparator (5) connects an input said and door (6), with another input termination of door (6) from the P1.4 pin of said single-chip microcomputer (7), connect the startup conversion pin of said analog to digital converter (3) with the output of door (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94219925 CN2210510Y (en) | 1994-08-31 | 1994-08-31 | Intelligent milliampere stopwatch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94219925 CN2210510Y (en) | 1994-08-31 | 1994-08-31 | Intelligent milliampere stopwatch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2210510Y true CN2210510Y (en) | 1995-10-18 |
Family
ID=33834650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94219925 Expired - Fee Related CN2210510Y (en) | 1994-08-31 | 1994-08-31 | Intelligent milliampere stopwatch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2210510Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104642960A (en) * | 2014-03-08 | 2015-05-27 | 德化县英山珍贵淮山农民合作社 | Vacuum freeze-drying apparatus used for common yam rhizome, and using method thereof |
-
1994
- 1994-08-31 CN CN 94219925 patent/CN2210510Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104642960A (en) * | 2014-03-08 | 2015-05-27 | 德化县英山珍贵淮山农民合作社 | Vacuum freeze-drying apparatus used for common yam rhizome, and using method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111478445B (en) | Intelligent communication and power supply system and method based on MCU control module | |
| CN2210510Y (en) | Intelligent milliampere stopwatch | |
| CN2091462U (en) | Portable harmonic wave analyzer | |
| CN202693670U (en) | Digital readout network instrument | |
| CN210833845U (en) | Digital weighing instrument | |
| CN212322079U (en) | Parameter simulator | |
| CN86105996A (en) | High voltage digital megchma meter with self-selected measuring range | |
| CN1328586C (en) | Electric energy quality monitoring, recording and analyzing system | |
| CN203786221U (en) | Energy efficiency data acquisition terminal possessing two RS485 interfaces | |
| CN209895153U (en) | Intelligent motor-pumped well control device | |
| CN207248972U (en) | A kind of data acquisition device based on power line carrier, PLC | |
| CN2336385Y (en) | Microcomputerized automatic testing and handling device for taps of transformer | |
| CN218180952U (en) | Multifunctional electric measuring meter | |
| CN207051711U (en) | Door ceiling light test device for subway safe door | |
| CN202002968U (en) | Electronic lightning stroke times collecting system of lightning arrester | |
| CN1963542A (en) | Real time collection storage apparatus used for electric energy computation chip | |
| CN2225039Y (en) | Temperature online monitor for medium and high voltage systems | |
| CN209821625U (en) | Intelligence is examined table junction box | |
| CN2840224Y (en) | Multi-position meter | |
| CN2064068U (en) | Digital display metering installation for accumulator capacity | |
| CN215726107U (en) | Temperature and humidity monitoring device for infant incubator body | |
| CN221042358U (en) | Single 188 shows TWS storehouse circuit that charges | |
| CN2486960Y (en) | Detection display and controller for synchronous motor power factor | |
| CN216563933U (en) | Charging wire and charger | |
| CN2363655Y (en) | Electronic hand tough height measuring device for jumper |
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 |