CN207180886U

CN207180886U - Temperature polling instrument

Info

Publication number: CN207180886U
Application number: CN201720656738.2U
Authority: CN
Inventors: 黄文通
Original assignee: XIAMEN HENGLIDE ELECTRONICS CO Ltd
Current assignee: XIAMEN HENGLIDE ELECTRONICS CO Ltd
Priority date: 2017-06-07
Filing date: 2017-06-07
Publication date: 2018-04-03
Anticipated expiration: 2027-06-07

Abstract

The utility model discloses a kind of temperature polling instrument, including single-chip microcomputer, multiple temperature sensors, analog switch, A/D converter, normally opened relay, normally closed relay, wireless communication module and power module, normally opened relay and normally closed relay are connected with single-chip microcomputer, single-chip microcomputer connects host computer by RS232 buses or RS422 buses, and the live real time temperature of detection and related off-limit alarm temperature value are sent to mobile terminal by single-chip microcomputer by wireless communication module；Power module includes the first triode, the second triode, transformer, the first voltage-stabiliser tube, the second diode, the 3rd diode, light emitting diode, fuse, first resistor to the 5th resistance, the first electric capacity, the second electric capacity and the 3rd electric capacity.Implement temperature polling instrument of the present utility model, have the advantages that：It can understand that field condition, circuit structure are relatively simple, cost is relatively low, the safety and reliability of circuit is higher whenever and wherever possible.

Description

Temperature polling instrument

Technical field

Logging field is the utility model is related to, more particularly to a kind of temperature polling instrument.

Background technology

Temperature polling instrument is widely used in power plant, power station and industrial environment temperature survey etc., and temperature has Multiple passages, the temperature of difference is tested, can be communicated by RS485 buses with host computer, receive the finger of host computer Make and the real time temperature at scene and related off-limit alarm temperature value are transmitted to host computer.Administrative staff can only be on host computer Relevant information is just will appreciate that, when administrative staff are not beside host computer, it is impossible to understand relevant information, that is, administrative staff Field condition can not be understood whenever and wherever possible, and experience is poor.In addition, the circuit of traditional temperature polling instrument is more multiple due to structure Miscellaneous, cost is higher.Simultaneously because lacking corresponding circuit protection function, cause the safety and reliability of circuit relatively low.

Utility model content

The technical problems to be solved in the utility model is, for the drawbacks described above of prior art, there is provided one kind can be at any time Field condition, the temperature patrol inspection that circuit structure is relatively simple, cost is relatively low, the safety and reliability of circuit is higher are understood everywhere Instrument.

Technical scheme is used by the utility model solves its technical problem：Construct a kind of temperature polling instrument, including list Piece machine, multiple temperature sensors, analog switch, A/D converter, normally opened relay, normally closed relay, wireless communication module and electricity Source module, multiple temperature sensors are connected with the analog switch, the analog switch also respectively with the single-chip microcomputer Connected with A/D converter, the A/D converter is also connected with the single-chip microcomputer, and the normally opened relay and normally closed relay are equal It is connected with the single-chip microcomputer, the single-chip microcomputer connects host computer by RS232 buses or RS422 buses, and the single-chip microcomputer will be examined The live real time temperature of survey and related off-limit alarm temperature value are sent to mobile terminal by the wireless communication module, institute Power module is stated to be connected with the single-chip microcomputer, for powering；

The power module includes the first triode, the second triode, transformer, the first voltage-stabiliser tube, the second diode, the Three diodes, light emitting diode, fuse, first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, first Electric capacity, the second electric capacity and the 3rd electric capacity, one end of one end of first electric capacity, one end of second resistance and the 4th resistance connect Connect one end of 220V alternating currents, the other end of one end connection 220V alternating currents of the fuse, the other end of the fuse Be connected with the other end of first electric capacity, the other end of the second resistance respectively with the base stage of first triode and One end connection of five electric capacity, the emitter stage of first triode respectively with one end of the first resistor and 3rd resistor one End connection, the other end of the 3rd resistor are connected with the anode of first voltage-stabiliser tube and one end of the 3rd electric capacity respectively, institute The other end for stating the 3rd electric capacity is connected with the base stage of second triode, the other end of the first resistor and the second triode Emitter stage be connected with the other end of the fuse, the other end of the 5th electric capacity collection with second triode respectively One end of electrode and the second electric capacity connects；

The other end of 4th resistance is connected with one end of the first primary coil of the transformer, the transformer The other end of first primary coil is connected with the colelctor electrode of first triode, the other end of second electric capacity respectively with institute The one end for stating the second primary coil of transformer connects with the negative electrode of the second diode, the anode of second diode with it is described The other end connection of fuse, the other end of the negative electrode of first voltage-stabiliser tube and the second primary coil of the transformer connect Connect, one end of the secondary coil of transformer one end, one end of the 5th resistance, light-emitting diodes with the 4th electric capacity respectively The anode of pipe connects with voltage output end, the other end of the 4th electric capacity, the other end of the 5th resistance and light emitting diode Anode of the negative electrode with the 3rd diode is connected, the other end of the secondary coil of the transformer and the 3rd diode Negative electrode connection.

In temperature polling instrument described in the utility model, the power module also includes the 6th electric capacity, the 6th electricity One end of appearance is connected with the colelctor electrode of first triode, at the beginning of the other end of the 6th electric capacity and the first of the transformer The other end connection of level coil, the capacitance of the 3rd electric capacity is 20PF, and the capacitance of the 5th electric capacity is 40PF, described The resistance of 4th resistance is 4.7K Ω, and the capacitance of the 6th electric capacity is 50PF.

In temperature polling instrument described in the utility model, the power module also includes the 6th resistance, the 6th electricity One end of resistance is connected with one end of the 3rd electric capacity, and the other end of the 6th resistance connects with the anode of first voltage-stabiliser tube Connect, the resistance of the 6th resistance is 100 Ω.

In temperature polling instrument described in the utility model, first triode and the second triode are NPN type three Pole pipe.

In temperature polling instrument described in the utility model, the wireless communication module be bluetooth module, WIFI module, GPRS module, Zigbee module, CDMA module or WCDMA modules.

Implement temperature polling instrument of the present utility model, have the advantages that：Due to single-chip microcomputer, multiple TEMPs Device, analog switch, A/D converter, normally opened relay, normally closed relay, wireless communication module and power module, such single-chip microcomputer The live real time temperature of detection and related off-limit alarm temperature value can be sent to movement eventually by wireless communication module End, power module include the first triode, the second triode, transformer, the first voltage-stabiliser tube, the second diode, the 3rd diode, Light emitting diode, fuse, first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the first electric capacity, second Electric capacity and the 3rd electric capacity, the component that power module uses is less, and the 3rd electric capacity and the 5th electric capacity are used to prevent from disturbing, the 4th electricity Hinder and be used for overcurrent protection, therefore can understand that field condition, circuit structure are relatively simple, cost is relatively low, the peace of circuit whenever and wherever possible Full property and reliability are higher.

Brief description of the drawings

, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only It is some embodiments of the utility model, for those of ordinary skill in the art, is not paying the premise of creative work Under, other accompanying drawings can also be obtained according to these accompanying drawings.

Fig. 1 is the structural representation in the utility model temperature polling instrument one embodiment；

Fig. 2 is the circuit theory diagrams of power module in the embodiment.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made The every other embodiment obtained, belong to the scope of the utility model protection.

In the utility model temperature polling instrument embodiment, the structural representation of the temperature polling instrument is as shown in Figure 1.Fig. 1 In, the temperature polling instrument include single-chip microcomputer 1, multiple temperature sensors 2, analog switch 3, A/D converter 4, normally opened relay 5, Normally closed relay 6, wireless communication module 8 and power module 9, above-mentioned multiple temperature sensors 2 are connected with analog switch 3, mould Intend switch 3 to be also connected with single-chip microcomputer 1 and A/D converter 4 respectively, A/D converter 4 is also connected with single-chip microcomputer 1, normally opened relay 5 It is connected with normally closed relay 6 with single-chip microcomputer 1, single-chip microcomputer 1 connects host computer 7, monolithic by RS232 buses or RS422 buses The live real time temperature of detection and related off-limit alarm temperature value are sent to mobile whole by machine 1 by wireless communication module End, power module 9 are connected with single-chip microcomputer 1, for powering.

Single-chip microcomputer 1 outputs signal to analog switch 3, and control analog switch 3 closes signalling channel all the way, temperature sensor 2 After gathering signal, pass to A/D converter 4 by analog switch 3 and carry out analog-to-digital conversion, A/D converter 4 is by the numeral after conversion Signal is sent into single-chip microcomputer 1, and the temperature value collected is transmitted to host computer 7 by single-chip microcomputer 1, in temperature of the single-chip microcomputer 1 according to setting Limit value, lower limit, out-of-limit judgement is made to real time temperature, when the temperature value for determining collection reach or temperature more than setting on When limit value, lower limit, single-chip microcomputer 1, which sends a signal to normally opened relay 5, closes normally opened relay 5, and normally opened relay 5 closes simultaneously Output alarm signal；Single-chip microcomputer 1 detects the abnormality of itself simultaneously, such as single-chip microcomputer RAM failures, definite value error, power module 9 During failure, the control of single-chip microcomputer 1 outputs signal to normally closed relay 6, and normally closed relay 6 disconnects and output signal.

In addition, the live real time temperature of detection and related off-limit alarm temperature value are passed through radio communication by single-chip microcomputer 1 Module is sent to mobile terminal, and such administrative staff can not only understand field condition on host computer 7, and mobile terminal can be hand Machine or tablet personal computer etc., such administrative staff's can carry with mobile terminal, whenever and wherever possible it will be seen that field condition.Value Obtain one to be mentioned that, above-mentioned wireless communication module 8 is bluetooth module, WIFI module, GPRS module, Zigbee module, CDMA module Or WCDMA modules etc..

Fig. 2 is the circuit theory diagrams of power module in the present embodiment, and in Fig. 2, the power module 9 includes the first triode Q1, the second triode Q2, transformer T, the first voltage-stabiliser tube D1, the second diode D2, the 3rd diode D3, LED, Fuse F1, first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the first electric capacity C1, Two electric capacity C2 and the 3rd electric capacity C3, wherein, the first electric capacity C16 one end, the one of second resistance R2 one end and the 4th resistance R4 End is all connected with one end of 220V alternating currents, and the other end of fuse F1 one end connection 220V alternating currents, fuse F1's is another End is connected with the first electric capacity C1 other end, and the second resistance R2 other end is electric with the first triode Q1 base stage and the 5th respectively Hold C5 one end connection, the first triode Q1 emitter stage connects with first resistor R1 one end and 3rd resistor R3 one end respectively Connect, the 3rd resistor R3 other end is connected with the first voltage-stabiliser tube D1 anode and the 3rd electric capacity C3 one end respectively, the 3rd electric capacity The C3 other end is connected with the second triode Q2 base stage, the first resistor R1 other end and the second triode Q2 emitter stage with Fuse F1 other end connection, the 5th electric capacity C5 other end colelctor electrode and the second electric capacity C2 with the second triode Q2 respectively One end connection.

In the present embodiment, the 4th resistance R4 other end is connected with transformer T the first primary coil L1 one end, transformation Device T the first primary coil L1 other end is connected with the first triode Q1 colelctor electrode, the second electric capacity C2 other end difference Be connected with transformer T the second primary coil L2 one end and the second diode D2 negative electrode, the second diode D2 anode with Fuse F1 other end connection, the first voltage-stabiliser tube D1 negative electrode are connected with transformer T the second primary coil L2 other end, Transformer T secondary coil L3 one end one end, the 5th resistance R5 one end, light emitting diode with the 4th electric capacity C4 respectively LED anode connects with voltage output end V1, the 4th electric capacity the C4 other end, the 5th resistance the R5 other end and light emitting diode Anode of the LED negative electrode with the 3rd diode D3 is connected, transformer T secondary coil the L3 other end and the 3rd diode D3 Negative electrode connection.

The power module 9 is compared with traditional power circuit, and the component that it is used is less, and circuit structure is relatively simple, Hardware cost can be so saved, therefore cost is relatively low.In addition, the 3rd electric capacity C3 and the 5th electric capacity C5 are coupled capacitor, the Three electric capacity C3 and the 5th electric capacity C5 are used to prevent the interference between the first triode Q1 and the second triode Q2, the 4th resistance R4 For current-limiting resistance, for carrying out overcurrent protection to the branch road between second resistance R1 and transformer T, therefore the security of circuit and Reliability is higher.Above-mentioned 3rd electric capacity C3 capacitance is 20PF, and the 5th electric capacity C5 capacitance is 40PF, the 4th resistance R4's Resistance is 4.7K Ω.

In the present embodiment, after switching on power, the first electric capacity C1 has 300V or so DC voltage, passes through second resistance R2 Base stage to the first triode Q1 provides electric current, and the first triode Q1 emitter stage has first resistor R1, the first triode Q1's Base stage obtain it is electric after, collector current can be produced by transformer T the first primary coil L1, and simultaneously the second of transformer T Induced voltage is produced on primary coil L2 and transformer T secondary coil L3.Transformer T secondary coil L3 is exported by the three or two Voltage output end V1 powering loads are connected after pole pipe D3 rectifications, the 4th electric capacity C4 filtering.Transformer T the second primary coil L2 The sampling rate being made up of after the second diode D2 rectifications, the second electric capacity C2 filtering the first voltage-stabiliser tube D1, the second triode Q2 Compared with circuit, the height of output voltage is detected, wherein transformer T the second primary coil L2 and the second electric capacity C2 also form the one or three Pole pipe Q1 positive-feedback circuit, the first triode Q1 is allowed to be operated in the higher-order of oscillation, ceaselessly the first primary coil to transformer T L1 powers, and when output voltage raises, transformer T the second primary coil L2, the first voltage-stabiliser tube D1 sampling rates relatively cause second Triode Q2 is turned on, and the first triode Q1 base current reduces, and the first triode Q1 collector current reduces, load capacity Diminish, so as to cause output voltage to reduce, after output voltage reduces, can end again after the second triode Q2 samplings, the one or three Pole pipe Q1 load capacity becomes strong, and output voltage can raise again, so plays automatic voltage regulation effect.

When load is overloaded or be short-circuit, the first triode Q1 collector current is increased, and first resistor R1 can be produced Higher pressure drop, high voltage caused by this overload or short circuit can allow the second triode Q2 saturations to be led by 3rd resistor R3 Logical, the 4th electric capacity C4 here functions as the effect of speed-up capacitor, and the second triode Q2 can be allowed to turn on the most fast time, so as to allow the One triode Q1 cut-offs, which stop output, prevents overload from damaging.Change first resistor R1 size, thus it is possible to vary load capacity.

First triode Q1 is operated on off state, and when the first triode Q1 ends, transformer T can produce very high electricity Magnetic induction voltage, under no load, very high voltage may be induced in the first triode Q1 colelctor electrode, this Individual voltage may be up to more than 1000 volts, and this can make the first triode Q1 punch through damage, and the 5th resistance R5 makes circuit occur without nothing The situation of load, such first triode Q1 would not damage because of the high electrical breakdown of colelctor electrode.

It is noted that in the present embodiment, the first triode Q1 and the second triode Q2 are NPN type triode.When So, under the certain situation of the present embodiment, the first triode Q1 and the second triode Q2 can also be PNP type triode, but At this moment circuit structure also can accordingly change.

In the present embodiment, the power module 9 also includes the 6th electric capacity C6, the 6th electric capacity C6 one end and the first triode Q1 Colelctor electrode connection, the 6th electric capacity C6 other end is connected with transformer T the first primary coil L1 other end, the 6th electric capacity C6 capacitance is 50PF.6th electric capacity C6 is coupled capacitor, for preventing that the first of the first triode Q1 and transformer T is primary Interference between coil L1, further to strengthen the safety and reliability of circuit.

In the present embodiment, the power module 9 also includes the 6th resistance R6, and the 6th resistance R6 one end is with the 3rd electric capacity C3's One end connects, the 6th resistance R6 other end with the first voltage-stabiliser tube D1 anode be connected, the 6th resistance R6 resistance is 100 Ω.6th resistance R6 is current-limiting resistance, for carrying out excessively stream guarantor to the branch road between the second triode Q2 and the first voltage-stabiliser tube D1 Shield, further to strengthen the safety and reliability of circuit.

In a word, in the present embodiment, because single-chip microcomputer 1 can be by the live real time temperature of detection and related off-limit alarm Temperature value is sent to mobile terminal by wireless communication module 8, and such administrative staff can just understand field condition whenever and wherever possible, electricity The component that source module 9 uses is less, and circuit structure is relatively simple, can save hardware cost, therefore cost is relatively low.Power supply mould Current-limiting resistance and coupled capacitor are provided with block 9, therefore the safety and reliability of circuit is higher.

Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model Within the spirit and principle of utility model, any modification, equivalent substitution and improvements made etc., the utility model should be included in Protection domain within.

Claims

A kind of 1. temperature polling instrument, it is characterised in that including single-chip microcomputer, multiple temperature sensors, analog switch, A/D converter, Normally opened relay, normally closed relay, wireless communication module and power module, multiple temperature sensors are opened with the simulation Connection is connect, and the analog switch is also connected with the single-chip microcomputer and A/D converter respectively, the A/D converter also with the list Piece machine is connected, and the normally opened relay and normally closed relay are connected with the single-chip microcomputer, and the single-chip microcomputer passes through RS232 buses Or RS422 buses connection host computer, the single-chip microcomputer is by the live real time temperature of detection and related off-limit alarm temperature value Mobile terminal is sent to by the wireless communication module, the power module is connected with the single-chip microcomputer, for powering；

The power module includes the first triode, the second triode, transformer, the first voltage-stabiliser tube, the second diode, the three or two Pole pipe, light emitting diode, fuse, first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the first electric capacity, Second electric capacity and the 3rd electric capacity, one end of one end of first electric capacity, one end of second resistance and the 4th resistance are all connected with One end of 220V alternating currents, the fuse one end connection 220V alternating currents the other end, the other end of the fuse with The other end connection of first electric capacity, the other end of the second resistance base stage and the 5th with first triode respectively One end connection of electric capacity, the emitter stage of first triode respectively with one end of the first resistor and one end of 3rd resistor Connection, the other end of the 3rd resistor is connected with the anode of first voltage-stabiliser tube and one end of the 3rd electric capacity respectively, described The other end of 3rd electric capacity is connected with the base stage of second triode, the other end of the first resistor and the second triode Emitter stage is connected with the other end of the fuse, the other end of the 5th electric capacity current collection with second triode respectively Pole connects with one end of the second electric capacity；

The other end of 4th resistance is connected with one end of the first primary coil of the transformer, and the first of the transformer The other end of primary coil is connected with the colelctor electrode of first triode, the other end of second electric capacity respectively with the change One end of second primary coil of depressor connects with the negative electrode of the second diode, anode and the fusing of second diode The other end connection of device, the negative electrode of first voltage-stabiliser tube are connected with the other end of the second primary coil of the transformer, institute State one end of the secondary coil of transformer one end with the 4th electric capacity, one end of the 5th resistance, the anode of light emitting diode respectively Connected with voltage output end, the negative electrode of the other end of the 4th electric capacity, the other end of the 5th resistance and light emitting diode with The anode connection of 3rd diode, the negative electrode of the other end of the secondary coil of the transformer and the 3rd diode connect Connect.
2. temperature polling instrument according to claim 1, it is characterised in that the power module also includes the 6th electric capacity, institute The one end for stating the 6th electric capacity is connected with the colelctor electrode of first triode, the other end and the transformer of the 6th electric capacity The first primary coil the other end connection, the capacitance of the 3rd electric capacity is 20PF, and the capacitance of the 5th electric capacity is 40PF, the resistance of the 4th resistance is 4.7K Ω, and the capacitance of the 6th electric capacity is 50PF.
3. temperature polling instrument according to claim 2, it is characterised in that the power module also includes the 6th resistance, institute The one end for stating the 6th resistance is connected with one end of the 3rd electric capacity, the other end and first voltage-stabiliser tube of the 6th resistance Anode connection, the resistance of the 6th resistance is 100 Ω.
4. according to the temperature polling instrument described in claims 1 to 3 any one, it is characterised in that first triode and Two triodes are NPN type triode.
5. according to the temperature polling instrument described in claims 1 to 3 any one, it is characterised in that the wireless communication module is Bluetooth module, WIFI module, GPRS module, Zigbee module, CDMA module or WCDMA modules.