CN202255690U

CN202255690U - Temperature sensor detection apparatus

Info

Publication number: CN202255690U
Application number: CN2011203653533U
Authority: CN
Inventors: 傅俊豪; 傅加发; 傅汉水
Original assignee: FUJIAN JUNHAO ELECTRONICS Co Ltd
Current assignee: FUJIAN JUNHAO ELECTRONICS Co Ltd
Priority date: 2011-09-28
Filing date: 2011-09-28
Publication date: 2012-05-30
Anticipated expiration: 2021-09-28

Abstract

The utility model relates to a temperature sensor detection apparatus, comprising a temperature signal collection circuit and a one-chip microcomputer control circuit; the temperature signal collection circuit and a relay control circuit are of bidirectional data transmission; the output signals of the temperature signal collection circuit are transmitted to the one-chip microcomputer control circuit successively through an analog switching circuit, an operation amplification circuit and an A/D data converting circuit; the output signals of the relay control circuit are transmitted to the one-chip microcomputer control circuit which controls the output signals to a display circuit, an alarm circuit and a communication circuit. The apparatus employs on-line monitoring contacts and simulation temperature signals which are transmitted to a one-chip microcomputer for determination; control signals are emitted and are transmitted to a personal computer through an RS485 communication bus to realize the on-line detection of the personal computer.

Description

A kind of temperature sensor detector

Technical field

The utility model relates to a kind of pick-up unit, particularly be a kind of temperature sensor detector.

Background technology

K type temperature sensor is the important detecting instrument as multimeter and temperature controller; K type temperature sensor is made up of two thermometric lines; But front end must connect the joint solder joint through specific purpose tool; If this contact is in open-circuit condition, whole temperature sensor can not be worked, and survey instrument has controller also to be in off working state.

The utility model content

The purpose of the utility model is to overcome above-mentioned deficiency, and a kind of temperature sensor detector is provided.

The utility model solves the technical scheme that its technical matters adopted: a kind of temperature sensor detector; Comprise temperature signal collection circuit and single chip machine controlling circuit; Said temperature signal collection circuit and control relay circuit bidirectional data transfers; The output signal of temperature signal collection circuit transfers to single chip machine controlling circuit through analog switching circuit, operational amplification circuit, A/D data converting circuit successively; The output signal of control relay circuit sends to single chip machine controlling circuit, and single chip machine controlling circuit control exports display circuit, warning circuit, telecommunication circuit to.

Said temperature signal collection circuit connects resistance R 1, R2, R3 by the output terminal of K type temperature sensor TK, and diode D1, capacitor C 1 constitute.

Said control relay circuit is mainly by relay J 1 and contact J1-1 thereof, J1-2, J1-3, and the triode T1 that is connected with relay J 1 constitutes.

Said display circuit adopts LCD display.

Said telecommunication circuit is for adopting the RS485 communication interface circuit of SN75176 signal transmitting and receiving chip, and its output signal sends to PC.

Through adopting above-mentioned technical scheme, the beneficial effect of the utility model is: the utility model adopts on-line monitoring contact and analog temperature signal, is sent to single-chip microcomputer; After single-chip microcomputer is judged; Send control signal, be sent to PC, realize the online detection of PC through the RS485 communication bus.

Description of drawings

Fig. 1 is the frame assumption diagram of the utility model;

Fig. 2 is the circuit theory diagrams of the utility model.

Embodiment

As shown in Figure 1; A kind of temperature sensor detector of the utility model; Comprise temperature signal collection circuit 1 and single chip machine controlling circuit 3; Said temperature signal collection circuit 1 and control relay circuit 2 bidirectional data transfers; The output signal of temperature signal collection circuit 1 transfers to single chip machine controlling circuit 3 through analog switching circuit 11, operational amplification circuit 12, A/D data converting circuit 13 successively, and the output signal of control relay circuit 3 sends to single chip machine controlling circuit 3, and single chip machine controlling circuit 3 controls export display circuit 31, warning circuit 32, telecommunication circuit 33 to.

As shown in Figure 2, said temperature signal collection circuit 1 connects resistance R 1, R2, R3 by the output terminal of K type temperature sensor TK, and diode D1, capacitor C 1 constitute; The end of temperature sensor TK is connected in contact J1-1, and when relay J 1 not adhesive, contact J1-1 and J1-2 are that normally closed point is in conducting state; Contact J1-2 is in ground state, and when the object that is contacted as temperature sensor TK had certain temperature, the temperature sensor TK other end produced small direct current signal through operational amplifier U4 and peripheral circuit resistance R 4, resistance R 3, diode D1, resistance R 5; The output dc voltage signal; Be sent to single-chip microcomputer U1, when reaching setting value, send warning message.When pushing button K1, the 5th pin of single-chip microcomputer U1 output high level makes triode T1 conducting, relay J 1 adhesive; Contact J1-1 no longer connects with contact J1-2, but contact J1-1 and J1-3 connection are connected to the Q point, and Q point current potential receives the 3rd foot control system of analog switching circuit U3; The 4th, 2,5,1,12,15,14,13 pin of analog switching circuit U3 and resistance R 7-R121 form bleeder circuit, form 8 sections different simulation temperature voltage signals, through single-chip microcomputer U1 the control of analog switching circuit U3 are switched; The temperature signal of the 3rd pin output different brackets of analog switching circuit U3, this signal flows to resistance R 3 through temperature sensor TK, after the inner amplification of operational amplifier U4; By its 6th pin output; Be connected to the 2nd pin of A/D data converter U5, carry out the A/D data-switching, when temperature sensor TK is in off state; The 7th, 8,27 pin by A/D data converter U5 the 5th, 6,7 pin and single-chip microcomputer U1 are formed datel circuit; Single-chip microcomputer U1 reads the current data information of analog switching circuit U3, after the comprehensive judgement of single-chip microcomputer U1 internal processor, sends control signal; First via output is connected with the 3rd, 4,5,6 pin of LCD display U2 by the 36th, 37,38,39 pin of single-chip microcomputer U1, shows the current information state by LCD display U2; The second tunnel output through resistance R 25 current limlitings, makes news Chinese percussion instrument BDD send alarm sound by the 32nd pin output low level of single-chip microcomputer U1; Third Road output is formed the RS485 telecommunication circuit by the 9th, 10,25 pin of single-chip microcomputer U1 and the 1st, 2,3,4 pin of SN75176 signal transmitting and receiving chip U5; Send data-signal by single-chip microcomputer U1; Drive SN75176 signal transmitting and receiving chip U5 through system bus to the PC data information; PC shows the current information state, reaches the purpose that PC accurately shows.

An above-described preferred embodiment that is merely the utility model can not limit the scope that this practicality is implemented, and every equalization of being done according to the utility model claim changes and decorates, and all should still belong to the scope that the utility model is contained.

Claims

1. temperature sensor detector; Comprise temperature signal collection circuit (1) and single chip machine controlling circuit (3); It is characterized in that: said temperature signal collection circuit (1) and control relay circuit (2) bidirectional data transfers; The output signal of temperature signal collection circuit (1) transfers to single chip machine controlling circuit (3) through analog switching circuit (11), operational amplification circuit (12), A/D data converting circuit (13) successively; The output signal of control relay circuit (3) sends to single chip machine controlling circuit (3), and single chip machine controlling circuit (3) control exports display circuit (31), warning circuit (32), telecommunication circuit (33) to.

2. a kind of temperature sensor detector according to claim 1 is characterized in that: said temperature signal collection circuit (1) connects resistance R 1, R2, R3 by the output terminal of K type temperature sensor TK, and diode D1, capacitor C 1 constitute.

3. a kind of temperature sensor detector according to claim 1 is characterized in that: said control relay circuit (2) is mainly by relay J 1 and contact J1-1 thereof, J1-2, J1-3, and the triode T1 that is connected with relay J 1 constitutes.

4. a kind of temperature sensor detector according to claim 1 is characterized in that: said display circuit (31) adopts LCD display.

5. a kind of temperature sensor detector according to claim 1 is characterized in that: said telecommunication circuit (33) is for adopting the RS485 communication interface circuit of SN75176 signal transmitting and receiving chip, and its output signal sends to PC.