CN202836806U

CN202836806U - Handheld cola body temperature detection instrument

Info

Publication number: CN202836806U
Application number: CN 201220375615
Authority: CN
Inventors: 许满贵
Original assignee: Xian University of Science and Technology
Current assignee: Xian University of Science and Technology
Priority date: 2012-07-31
Filing date: 2012-07-31
Publication date: 2013-03-27
Anticipated expiration: 2022-07-31

Abstract

The utility model relates to a handheld cola body temperature detection instrument. The detection instrument is characterized in that a temperature sensor and linearization AD conversion module is connected with a single chip microcomputer module; the single chip microcomputer module generates an input signal data for outputting; the single chip microcomputer module is connected with an LED display module to display detection data; a self-locking switch module and a zeroing circuit module are respectively connected with the single chip microcomputer module to realize electrification of the whole circuit and carry out resetting and zeroing on the circuit. Advantages of the detection instrument are as follows: the precision requirement of the measurement is met; the instrument has advantages of simple and reasonable structure, portability, reliable running, convenient operation and maintenance, reduction of labor intensity of working staff, easy realization, low cost, and small volume; the using requirement on the severe underground production condition of the coal mine can be met; an important role in coal mine disaster prevention work can be played so as to guarantee the secure production of the coal mine; and thus the provided detection instrument has certain economic effects and social effects.

Description

Hand-held coal temperature detector

Technical field

The utility model is a kind of new mine product hand-held essential safe type coal temperature detector, mainly is applicable to measure down-hole coal bed temperature.

Background technology

Temperature is the detected parameters that the most easily run in the general industry field; detection such as environment temperature; the detection of industrial technology temperature; the temperature protection detection of equipment etc., and special-purpose on the market, general all kinds of temperature controller products are also abundanter; temperature detection instrument development level both domestic and external is mainly reflected in the intelligent level of instrument, the temperature range of measurement; on the precision of measuring and the technical indicators such as power consumption of instrument, at present domestic temperature survey seldom has to be higher than 0.1 ℃ on precision.

The coal temperature detection instrument can directly be measured the temperature of coal body, for forecasting coal spontaneous combustion in early stage provides technique guarantee, therefore extensively is generalized under the coal mine.Although at present, the development level of computer technology and electronic technology is all than comparatively fast, but still have a part of colliery to the temperature survey occasion of security system, also rest on mercury thermometer as survey instrument, there have been all kinds of contact type temperature measuring systems and non-contact type temperature measurement system, all have been used for measuring coal temperature.Generally speaking, the temperature detection technology of down-hole awaits further raising.

Summary of the invention

The purpose of this utility model provides a kind of for mine laneway hand-held coal temperature detector, can measure in real time, accurately the temperature in the Minepit environment, and the bound of energy set temperature, and can show by display the temperature of current coal body.It is a kind of simple and reasonable, and own wt is lighter is used for temperature monitor under the coal mine.

In order to realize the above object, technical solution of the present utility model is: a kind of hand-held coal temperature detector, it comprises with lower module: one-chip computer module, temperature sensor and linearization AD modular converter, self-lock switch module, zeroing circuit module, power circuit module, crystal oscillating circuit module and LED display module.Wherein nucleus module is one-chip computer module.Temperature sensor and linearization AD modular converter are realized induction and the conversion to temperature, and then are connected with one-chip computer module, and one-chip computer module is the output of the signal generated data of input.One-chip computer module is connected with the LED display module, shows the data of detection.The self-lock switch module is connected with one-chip computer module with the zeroing circuit module and is connected, and realizes to the energising of whole circuit and to the zeroing that resets of circuit.The crystal oscillating circuit module is the external crystal oscillator of single-chip microcomputer, and its frequency is fixed, and directly links to each other with one-chip computer module.Also promising circuit provides the power circuit module of DC voltage, and the power circuit module directly links to each other with one-chip computer module.

This practical coal temperature detector compared with prior art, its advantage has been to satisfy the accuracy requirement of measuring, and is rational in infrastructure, simple, light, reliable, and convenient operation and maintenance, reduced staff's labour intensity; Be easy to realize, cost is low, and volume is little; Can satisfy the request for utilization under the abominable working condition under coal mine, in the disaster prevention work in colliery, play an important role, ensure the safety in production in colliery, have certain economic benefit and social benefit.

Description of drawings

Fig. 1 is the utility model theory diagram.

Fig. 2 is the utility model circuit theory diagrams.

Embodiment

Below in conjunction with accompanying drawing, describe preferred embodiment of the utility model in detail.

As shown in Figure 1, a kind of hand-held coal temperature detector, the module that comprises: power circuit module 1, crystal oscillating circuit module 2, temperature sensor and linearization AD modular converter 3, one-chip computer module 4, LED display module 5, self-lock switch module 6 and zeroing circuit module 7.Wherein nucleus module is one-chip computer module 4.Temperature sensor and linearization AD modular converter 3 are realized induction, the conversion to temperature, link to each other with one-chip computer module 4 more afterwards.Then one-chip computer module 4 is the output of the signal generated data of input, and last one-chip computer module 4 is connected with LED display module 5, shows the data that detect.Wherein self-lock switch module 6, zeroing circuit module 7, power circuit module 1, crystal oscillating circuit module 2 are all distinguished the direct connection of being connected with one-chip computer module, realize the startup to whole circuit, the effect that resets, switches on and frequency is provided.

As shown in Figure 2, power circuit module 1 is to be connected by direct supply DC+5V, diode D1, plug-in component switch JP1,7805 chips, capacitor C 3, C4, resistance R 1 and LED light, thereby forms whole power circuit.Wherein diode D1 plays anti-reverse effect.Whole power circuit module 1 is the voltage from left side input+5V, through diode D1, then when switch plug-in unit JP1 presses, voltage is just arranged in the circuit, and after through 7805 linear voltage stabilization effect, the voltage of output 5V provides voltage for whole circuit.Wherein voltage passes through resistance R 1(metering function, for the protection of LED again through capacitor C 3, C4 filter action in the power circuit module 1), arrive diode (LED).Wherein the LED diode has indicative function, is used to indicate whether electricity is arranged.

Power circuit module 1 provides stable voltage for one-chip computer module 4, and burning voltage is inputted from single-chip microcomputer pin VCC through the effect of filtering capacitor C 6.One-chip computer module 4 is comprised of nucleus module 89c51 single-chip microcomputer, adopts dual-in-line packing (DIP) mode of 40 pins of bus-type, and one-chip computer module 4 links to each other with LED display module 5.The LED charactron is present the most frequently used digital indicator, adopts four sections common cathode charactrons.LED display module 5 is comprised of four triode Q1, Q2, Q3, Q4, four resistance R 16, R17, R18, R19 and LED4.The pin P2.0-P2.3 of single-chip microcomputer at first is connected with resistance R, the effect of R17, R18, R19(turn-on transistor) connect, then resistance R 16, R17, R18, R19 are connected with the base stage of triode Q1, Q2, Q3, Q4, and the emitter-base bandgap grading of last triode is connected with L1, L2, L3, the L4 of LED4 respectively again.Also have the metering function of the pin P0.0-P0.7 process R2-R9 of single-chip microcomputer to be connected with LED4, just can finish Presentation Function.

Temperature sensor and linearization AD modular converter 3 are by the programmable K type of chip MAX6675(thermopair A/D converter), filter capacitor C5, sensor interface J3, J5 (thermopair) form.It also directly links to each other with single-chip microcomputer.Inner integrated cold junction compensation circuit, nonlinearity correction circuit, the disconnected even testing circuit of MAX6675 brings great convenience all for the use of K type thermopair.2,3 pins of MAX6675 meet respectively measuring junction J5 and the cold junction J3 of thermopair.The

5,6 of MAX6675,7 is connected P3.5, P3.6, P3.7 and is connected with single-chip microcomputer.

Zeroing circuit module 7 is comprised of resistance R 20 and Rx.Wherein resistance R x one end links to each other with single-chip microcomputer P1.0 pin, an end ground connection (GND).

Self-lock switch module 6 is finished reset function, and it also links to each other with single-chip microcomputer.Self-lock switch module 6 is comprised of electrochemical capacitor Cset, resistance R set1 and Rset2 and function button BUTTON.The other end ground connection (GND) of Rset1.The pin of BUTTON is connected the pin (RESET) that resets and is connected with single-chip microcomputer, the RESET reset pin is that the miscellaneous part in single-chip microcomputer or the system is in certain initial state.

Crystal oscillating circuit module 2 directly links to each other with single-chip microcomputer.Because single-chip microcomputer needs external crystal-controlled oscillation to work, so need an external crystal oscillator, its frequency of operation is fixed substantially.It is by the CRYSTAL(crystal oscillator), capacitor C 1, C2 form.A pin of crystal oscillator is connected with XTAL1, and one is connected with XTAL2.

In the use procedure, at first probe is embedded in the coal body in the 1.5-2m scope, draw line, it places coal body for a long time, separate with the utility model, during work, the lead-in wire that at first will pop one's head in links to each other with the utility model interface, press self-lock switch, charactron will dynamically show current measurement temperature.If temperature sensor does not connect in the measuring process, will continue to show numeral " 1 ", if this moment, the sensor connection recovered normal, show constant.Should shut down this moment, and then start shows Current Temperatures again.Hand-held coal body detector is a kind of contact high precision detecting instrument, has the characteristics such as volume is little, lightweight, precision is high, dustproof, moistureproof, easy to use.Can in the environment that combustible dust or gas explosion danger are arranged, use.

Claims

1. hand-held coal temperature detector, it comprises with lower module: one-chip computer module (4), temperature sensor and linearization AD modular converter (3), self-lock switch module (6), zeroing circuit module (7) and LED display module (5), it is characterized in that: wherein nucleus module is one-chip computer module (4), temperature sensor is connected 3 with linearization AD modular converter) be connected with one-chip computer module (4), one-chip computer module (4) is the output of the signal generated data of input, one-chip computer module (4) links to each other with LED display module (5) to fetch and shows the data that detect, self-lock switch module (6) is connected 7 with the zeroing circuit module) be connected 4 with one-chip computer module respectively) connect, realize to the energising of whole circuit and to the zeroing that resets of circuit.