CN2226758Y - Alarm induction setting switch of digital display instrument - Google Patents
Alarm induction setting switch of digital display instrument Download PDFInfo
- Publication number
- CN2226758Y CN2226758Y CN94218088U CN94218088U CN2226758Y CN 2226758 Y CN2226758 Y CN 2226758Y CN 94218088 U CN94218088 U CN 94218088U CN 94218088 U CN94218088 U CN 94218088U CN 2226758 Y CN2226758 Y CN 2226758Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- digital display
- signal
- display instrument
- sensing chip
- 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
- 230000006698 induction Effects 0.000 title claims abstract description 10
- 238000006243 chemical reaction Methods 0.000 claims abstract description 5
- 230000001105 regulatory effect Effects 0.000 claims abstract description 4
- 230000001939 inductive effect Effects 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract 1
- 239000003990 capacitor Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Images
Landscapes
- Electronic Switches (AREA)
Abstract
An alarm induction setting switch of a digital display instrument mainly comprises an induction sheet and a circuit control part, wherein the induction sheet is arranged on a panel of the digital display instrument, and induced signals are transmitted to an induction control circuit and then transmitted to a signal gating circuit; and the input stage circuit and the set voltage regulating circuit are respectively connected with the signal gating circuit and the comparison alarm circuit and are sent to the A/D conversion display circuit after measurement gating. The utility model discloses simple structure, simple to operate, difficult wearing and tearing, long service life have improved the reliability of digital display appearance greatly to various machinery on the fungible digital display appearance dabs button switch.
Description
The utility model belongs to instrument and makes the field, specifically a kind of contactless warning induction configuration switch that can be used for digital indicator.
Widely used digital temperature display instrument in factory at present, all adopt the contact pushbutton switch as the bound alarm settings switch in the XMT101 digital display instrument of Kunshan, Jiangsu instrucment and meter plant and the production of Anhui Tian Changxian instrucment and meter plant, this switch intensity is little, the contact is easy to wear, mechanical life is short, the reliability of using is relatively poor, and assembles up complicated.
The purpose of this utility model is to provide a kind of not easy to wear, reliable, contactless digital display instrument induction alarm configuration switch of use.
The technical solution of the utility model is this realization: it mainly is made up of sensing chip and circuit control part branch, it is characterized in that: sensing chip is contained on the panel of digital indicator, after the signal that is induced by the upper and lower limit sensing chip reaches the upper and lower limit inductive control circuit respectively, deliver to the signal gating circuit again; Input stage circuit, bound setting voltage regulating circuit respectively have an end to be connected with the signal gating circuit, and their other end is connected to the comparison warning circuit respectively; Signal behind signal gating circuit measuring gating send A/D conversion display circuit, shows at the display window of digital display instrument panel.
The utility model is simple in structure, easy for installation, owing to be contactless, not easy to wear, compare with existing contact switch serviceable life and can improve more than 3 times, also improved the reliability of digital indicator simultaneously.
Fig. 1 is the utility model circuit block diagram.
Fig. 2 is circuit theory diagrams of the present utility model.
Be in conjunction with the accompanying drawings and embodiments the utility model to be described in further detail below, sensing chip 8 is a conductive sheet metal, present embodiment is fixed on the panel of digital display instrument with copper sheet, when upper and lower sensing chip 8 is not touched, upper and lower limit inductive control circuit 1,2 is in cut-off state, four two-way switch integrated packages 4066 the 6th ' pin in the signal gating circuit 3 is supply voltage 12V, 8 ', the conducting of 9 ' pin, export A/D conversion display circuit 5 from the input signal of input stage circuit 7 to through 8 ' pin to 9 ' pin and carry out numeral demonstration.When needs showed or regulate last (descending) limit setting value, with sensing chip on the finger touch 8, induced signal reached the triode T in the upper limit inductive control circuit 1
1Base stage, collector respectively with resistance R
1, capacitor C
1An end and 13 ' pin of signal gating circuit 3 be connected, emitter also is connected to 14 ' pin of signal gating circuit 3, this moment triode T
1Saturation conduction, its collector voltage approximates supply voltage 12V, resistance R
1, capacitor C
1Other end ground connection, resistance R
1Be used for adjusting induction sensitivity, capacitor C
1Be filter capacitor, four two-way switch integrated packages the 13rd ' pin also approximates power supply 12V, the 1st ', the conducting of 2 ' pin, by diode D
1, make the 5th ' pin voltage also be about 12V, the 3rd ', the also conducting of 4 ' pin.Input stage circuit 7 has an end to send into 8 ' pin of signal gating circuit 3, and the other end is connected with comparison warning circuit 6.Potentiometer W in the bound setting voltage regulating circuit 4
1Voltage on the center tap, add to 1 ' pin in comparison warning circuit 6 and the signal gating circuit 3 respectively, wherein one the tunnel deliver to A/D conversion display circuit 5 again through 1 ' pin to 2 ' pin and show, simultaneously because 3 ', the conducting of 4 ' pin makes 6 ' pin become earth potential, thereby 8 ', 9 ' pin disconnects measuring-signal is cut off, the unlikely alarm settings that influences.Principle to lower limit set is set identical with the upper limit.
Claims (3)
1, a kind of digital display instrument is reported to the police and is responded to configuration switch, mainly comprises that by sensing chip and circuit control section input stage circuit, bound setting voltage regulating circuit respectively have an end to be connected with the signal gating circuit, and their other end is connected to the comparison warning circuit respectively; Signal behind signal gating circuit measuring gating send A/D conversion display circuit to form, it is characterized in that: sensing chip is contained on the panel of digital display instrument, delivers to the signal gating circuit again after the signal that is induced by the upper and lower limit sensing chip reaches the upper and lower limit inductive control circuit respectively.
2, by the described a kind of digital display instrument warning induction configuration switch of claim 1, it is characterized in that: the signal that is induced by the upper and lower limit sensing chip reaches the transistor base in the upper and lower limit inductive control circuit respectively, its emitter is connected to the signal gating circuit, collector is connected the other end ground connection of resistance, electric capacity with an end of resistance, electric capacity and the other end of signal gating circuit respectively.
3, it is characterized in that by claim 1 or 2 described a kind of digital display instruments warning induction configuration switchs: sensing chip is conductive sheet metal, on the panel of the digital display instrument that is fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94218088U CN2226758Y (en) | 1994-08-10 | 1994-08-10 | Alarm induction setting switch of digital display instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94218088U CN2226758Y (en) | 1994-08-10 | 1994-08-10 | Alarm induction setting switch of digital display instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2226758Y true CN2226758Y (en) | 1996-05-08 |
Family
ID=33833361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94218088U Expired - Fee Related CN2226758Y (en) | 1994-08-10 | 1994-08-10 | Alarm induction setting switch of digital display instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2226758Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103868606A (en) * | 2012-12-13 | 2014-06-18 | 北京普源精电科技有限公司 | Method and device for monitoring column oven |
-
1994
- 1994-08-10 CN CN94218088U patent/CN2226758Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103868606A (en) * | 2012-12-13 | 2014-06-18 | 北京普源精电科技有限公司 | Method and device for monitoring column oven |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2226758Y (en) | Alarm induction setting switch of digital display instrument | |
| CN204859673U (en) | Electron light control system based on intelligence house | |
| CN201607624U (en) | Optical signal sensing alarm clock | |
| CN206162235U (en) | Electric current adjustable constant current source is used in electric power control | |
| CN201142777Y (en) | Classroom illumination electricity saving controller | |
| CN209103124U (en) | A kind of digital display unit of collection in worksite signal | |
| CN202997213U (en) | Multifunctional socket | |
| CN203149006U (en) | Simple multifunctional oscillograph | |
| CN205754267U (en) | A kind of super low-power consumption touch key-press circuit | |
| CN101620247A (en) | Electric intelligent display control transmitter | |
| CN204989896U (en) | Intelligence secondary meter | |
| CN2202308Y (en) | Portable unified vibration detector with digit displaying | |
| CN205015050U (en) | Water tank detection of water level appearance | |
| CN2486960Y (en) | Detection display and controller for synchronous motor power factor | |
| CN203587989U (en) | Multifunctional digital electronic clock | |
| CN203037738U (en) | Three-phase electric energy meter realized by and based on ADE7755 | |
| CN2385336Y (en) | Wide-range electronic kilo-watt-hour meter | |
| CN212322404U (en) | Wearable electrified reminding device | |
| CN206300741U (en) | A kind of intelligent digital electro connecting pressure gauge | |
| CN207492510U (en) | A kind of automobile solar energy luminescent cup pad | |
| CN2126919Y (en) | Ac.acoustooptic detecting instrument | |
| CN1741337A (en) | Flag bit specification multi-control mode voltage limiting 1+1 one-chip processor electric insulated chip | |
| CN2414421Y (en) | Universal electricity test pencil | |
| CN2341036Y (en) | Special temperature inspector for boiler | |
| CN204314374U (en) | A kind of multifunction intelligent digital Displaying Meter |
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 |