CN2826442Y - Digital tester for stray current of underground coal mine - Google Patents
Digital tester for stray current of underground coal mine Download PDFInfo
- Publication number
- CN2826442Y CN2826442Y CN 200520075883 CN200520075883U CN2826442Y CN 2826442 Y CN2826442 Y CN 2826442Y CN 200520075883 CN200520075883 CN 200520075883 CN 200520075883 U CN200520075883 U CN 200520075883U CN 2826442 Y CN2826442 Y CN 2826442Y
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- stray current
- coal mine
- circuit
- chip microcomputer
- single chip
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- Expired - Fee Related
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- 239000003245 coal Substances 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 claims description 7
- 230000006870 function Effects 0.000 abstract description 6
- 238000012360 testing method Methods 0.000 abstract description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 238000004891 communication Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
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Abstract
The utility model relates to a digital tester for stray current of an underground coal mine, which is most suitable for testing the stray current of underground coal mine. The utility model is composed of a single chip computer, a memory, a stray current testing sensor, etc., wherein an input end of the sensor is connected with an object to be measured; an output end of the sensor is connected with an input end of the single chip computer through A/D conversion; an LCD display is driven by an output end of the single chip computer through an interface; a keyboard is connected with the single chip computer; instructions are input through the keyboard; the operating state of a unilateral conducting device is displayed in time through the LCD display; the single chip computer can be communicated with computers through a serial interface. The utility model has the integral functions of measuring, remembering, calculating, displaying and alarming. The utility model has the advantage of simple operation.
Description
Technical field
The utility model relates to stray current tester under the Digital Coal mine, is particularly useful for stray current under the coal mine is detected.
Background technology
Having now stray current is measured employed mode still is traditional electromagnetic type dc milliammeter, and this tradition electromagnetic meter only has the measurement Presentation Function.Because stray current is random occurrence and is the continually varying amount, also there is not instrumentation at present for the test of measuring stray current under the coal mine, be the convenient test that solves the down-hole stray current, and assurance safety, need a kind of stray current analyzer of special use to measure, the function that this stray current analyzer should have measurement, memory, calculating, demonstration and report to the police.
Summary of the invention
The purpose of this utility model provides stray current tester under a kind of Digital Coal mine of the function that has measurement, memory, calculating, shows and report to the police.
The technical scheme that the utility model adopted is: stray current tester mainly is made up of single-chip microcomputer, external data memory, input end, pre-service, A/D converter, 7 sections LCD and driving circuit thereof, keypad input circuit, audible and visual alarm circuit, serial communication interface circuit under the Digital Coal mine.Have two signal input parts, stray current sensor detects the stray current signal, receive the pre-process circuit input end, the stray current signal is treated as the voltage signal that is fit to the conversion of A/D change-over circuit through pre-process circuit, receive the input end of A/D converter, the data line of A/D transducer is received on the data line of single-chip microcomputer, and the stray current signal is handled, single-chip microcomputer is connected to 7 n segment display ns by expansion, and the size of stray current is shown; Single-chip microcomputer is connected to output alarm signal in addition and drives hummer and light emitting diode, when stray current signal during greater than a certain setting value, send alerting signal, expand in addition random access memory is arranged, be used to deposit detected stray electrical flow valuve, the serial line interface of single-chip microcomputer is connected to connector, signal can be transferred to the stray current signal in the host computer by serial mode, to be further processed and to study; Single-chip microcomputer is connected to keypad by latch, by keyboard can setup parameter, issue communication, check data, order such as backlight.
Stray current tester under the utility model Digital Coal mine is best suited for the test of stray current under the coal mine.It is made up of single-chip microcomputer, storer, stray current detecting sensor etc., the input end of sensor is connected with determinand, the sensor output terminal is connected with the input end of single-chip microcomputer through the A/D conversion, the single-chip microcomputer output terminal drives LCD by interface and shows, and be connected with keyboard, but by the keyboard input instruction, and show the duty of unilateal conduction device in real time by LCD display, also can be by serial line interface and compunication.Be the detecting instrument of a kind of full digital of detection design of stray current under the coal mine, whether it can exist situation about transfiniting according to the automatic calculating of the electric current that measures, and determines whether that according to result of calculation needs report to the police automatically, reminds the staff to note.This special-purpose stray current analyzer is when measuring, and to the function that stray current has measurement, memory, calculating, demonstration and reports to the police, its range is 0～1000mA.It is simple to operate, and result of use is good, has practicality widely.
Description of drawings
Fig. 1 is the utility model schematic block circuit diagram.
Fig. 2 is the utility model circuit theory diagrams.
Embodiment
Below in conjunction with accompanying drawing an embodiment of the present utility model is described further:
Stray current tester under the utility model Digital Coal mine, as shown in Figure 2, single-chip microcomputer selects for use the 89C51 type to form minimum system, and expansion 8K external data memory chip 6264, sensor stray current signal, introduce by input port port01 and port02, carry out pre-service through the pre-process circuit of building by UI1, AR1, the AIN mouth of MAX191 serial a/d converter is received in pre-service output, A/D converter is delivered to 8 data that convert on the data bus DB, enters data-carrier store 6264; 47 sections LCD and driving circuit thereof, keypad input circuit, audible and visual alarm circuit, serial communication interface circuit are formed.Have two signal input parts, signal is received the pre-process circuit input end, the stray current signal is treated as the voltage signal that is fit to the conversion of A/D change-over circuit through pre-process circuit, receive the input end of A/D converter, the data line of A/D transducer is received on the data line of single-chip microcomputer, the stray current signal is handled, and single-chip microcomputer is connected to 7 n segment display ns by expansion, and the size of stray current is shown; Single-chip microcomputer is connected to output alarm signal in addition and drives hummer and light emitting diode, when stray current signal during greater than a certain setting value, send alerting signal, expand in addition random access memory is arranged, be used to deposit detected stray electrical flow valuve, the serial line interface of single-chip microcomputer is connected to connector, signal can be transferred to the stray current signal in the host computer by serial mode, to be further processed and to study; Single-chip microcomputer is connected to the keypad of 16 keys by latch, wherein, and 10 keys (S0～, be used to import 10 system data S9) as numerical key; All the other six key functions are as follows: 1) the STX key is used for the serial communication enable key, presses this key table and shows carrying out serial communication with computing machine, and the data of storing in the storer are sent to computing machine.2) the SZM key is used for the side light control that LCD shows, press this key and send side light by LED1 so that the test operation personnel read the numerical value that LCD shows, press once more this key then LED1 extinguish.3) STS key is used for being provided with or adjusting the instrument internal time.4) the SY3 key is used to watch the stray electrical flow valuve that records in the past.Click the stray electrical flow valuve that records before beginning to show, press this key once more and then stop to watch the stray electrical flow valuve that records in the past.When 5) SY1, SY2 key work at the SY3 key, turn over before being used for or after turn over the historical stray current record of demonstration.Press the SY1 key demonstration record is turned over forward, press the SY2 key demonstration record is turned over backward; When working, the STS key is used for: the redirect between year, month, day, hour, min.Pressing the SY1 key shows by the big time and jumps between adjacent hour, for example by showing that ' year ' jumps to demonstration ' moon '.Press the SY2 key show by hour between jump to the adjacent big time, for example by showing that ' branchs ' turn demonstration ' hour ', for importing the new time.
Claims (2)
1. stray current tester under the Digital Coal mine, it is characterized in that core circuit is a single chip circuit, signal is received the pre-process circuit input end through two input ends, the pre-process circuit output terminal is received the input end of A/D change-over circuit, the data line of A/D transducer is received on the data line of single chip circuit, and single-chip microcomputer is connected to 7 n segment display ns by display driver circuit, and single-chip microcomputer is connected to hummer and light emitting diode in addition, the single-chip microcomputer serial line interface is connected to connector, and the single-chip microcomputer expansion has keypad.
2. stray current tester under the Digital Coal mine according to claim 1 is characterized in that: 7 n segment display ns only have 3-8, and keypad has 4-20 button.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520075883 CN2826442Y (en) | 2005-09-27 | 2005-09-27 | Digital tester for stray current of underground coal mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520075883 CN2826442Y (en) | 2005-09-27 | 2005-09-27 | Digital tester for stray current of underground coal mine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2826442Y true CN2826442Y (en) | 2006-10-11 |
Family
ID=37066631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520075883 Expired - Fee Related CN2826442Y (en) | 2005-09-27 | 2005-09-27 | Digital tester for stray current of underground coal mine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2826442Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101226682B (en) * | 2007-01-19 | 2010-08-18 | 同济大学 | Device for monitoring stray current of novel subway |
| CN105223413A (en) * | 2015-06-26 | 2016-01-06 | 中国船舶重工集团公司第七二五研究所 | A kind of marine ship seawater pipeline stray current detecting device |
-
2005
- 2005-09-27 CN CN 200520075883 patent/CN2826442Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101226682B (en) * | 2007-01-19 | 2010-08-18 | 同济大学 | Device for monitoring stray current of novel subway |
| CN105223413A (en) * | 2015-06-26 | 2016-01-06 | 中国船舶重工集团公司第七二五研究所 | A kind of marine ship seawater pipeline stray current detecting device |
| CN105223413B (en) * | 2015-06-26 | 2018-09-04 | 中国船舶重工集团公司第七二五研究所 | A kind of marine ship seawater pipeline stray current detecting device |
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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 |