CN204594593U - Multi-channel temperature measurement system - Google Patents

Multi-channel temperature measurement system Download PDF

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Publication number
CN204594593U
CN204594593U CN201520072490.6U CN201520072490U CN204594593U CN 204594593 U CN204594593 U CN 204594593U CN 201520072490 U CN201520072490 U CN 201520072490U CN 204594593 U CN204594593 U CN 204594593U
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China
Prior art keywords
temperature
channel
unit
temperature measurement
control unit
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Expired - Fee Related
Application number
CN201520072490.6U
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Chinese (zh)
Inventor
魏新
郑家勇
聂绪超
高向明
苑进社
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Chongqing Normal University
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Chongqing Normal University
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Priority to CN201520072490.6U priority Critical patent/CN204594593U/en
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Abstract

The utility model discloses a kind of multi-channel temperature measurement system, comprise temperature detecting unit, temperature compensation unit, signalling channel gating unit and a central control unit; The utility model utilizes signalling channel gating unit to make multiple temperature sensor share the structure of a temperature compensation unit, realize multi-channel temperature measurement, structure comparatively simplifies, reduce instrument volume, reduce and manufacture and use cost, each check point has identical compensation precision, thus reaches testing result comparatively accurately.

Description

Multi-channel temperature measurement system
Technical field
The utility model relates to a kind of system for detecting temperature, particularly a kind of multi-channel temperature measurement system.
Background technology
Utilize temperature sensor to carry out detection appointed place temperature, belong to the mode that every field is comparatively common; Temperature sensor kind is more, and application scenario is also different; The temperature signal that temperature sensor collects needs to reach data processing or storage facilities after temperature compensation, conversion, amplification.Therefore, existing system for detecting temperature structure is comparatively complicated, and cost is also higher; Particularly for needing the system detecting multi-point temp, structure is comparatively complicated especially, and not only cost is higher, and the acquisition precision of manufacturing process and temperature parameter is not also done.
Therefore, need a kind of multi-channel temperature measurement system, realize multi-channel temperature measurement, structure comparatively simplifies, and reduces instrument volume, and reduce and manufacture and use cost, each check point has identical compensation precision, thus reaches testing result comparatively accurately.
Utility model content
In view of this, the utility model provides a kind of multi-channel temperature measurement system, realizes multi-channel temperature measurement, structure comparatively simplifies, and reduces instrument volume, reduces and manufactures and use cost, each check point has identical compensation precision, thus reaches testing result comparatively accurately.
Multi-channel temperature measurement system of the present utility model, comprising:
Temperature detecting unit, the multiple temperature sensors being distributed in multiple temperature detecting point for correspondence are for detecting and obtaining the temperature parameter of measured point;
A temperature compensation unit, the temperature parameter for receiving temperature detecting unit go forward side by side trip temperature compensate;
Signalling channel gating unit, exports the signal of multiple temperature sensor and selects a selection conducting to temperature compensation unit;
Central control unit, for receiving temperature parameter that temperature compensation unit transmits and sending selection ON command to signal transmission unit.
Further, described signalling channel gating unit comprises:
Switch element, for multiple Switch Controller should be connected between multiple temperature sensor and temperature compensation unit, for opening and closing temperature parameter transmission channel;
Channel control unit, for receiving the order of central control unit and sending to switch element and select an ON command to multiple switch;
Further, multi-channel temperature measurement system also comprises:
Communication unit, the data parameters received by central control unit passes to host computer;
Further, described temperature sensor is K type thermopair; Temperature compensation unit is the chip MAX6675 to K type thermocouple cold junction compensation;
Further, described switch is light coupling relay; Channel control unit is the code translator for selecting a selection conducting to multiple light coupling relay;
Further, described central control unit exports and is connected with display unit;
Further, described communication unit is PL2303 serial communication chip, and described host computer is PC; Light coupling relay is ac30s [okita], and described code translator is 74HC154; Central control unit signal is connected with clock chip DS1302;
Further, multi-channel temperature measurement system is eight road system for detecting temperature, and the temperature sensor of described temperature detecting point and correspondence is eight.
The beneficial effects of the utility model: multi-channel temperature measurement system of the present utility model, signalling channel gating unit is utilized to make multiple temperature sensor share the structure of a temperature compensation unit, realize multi-channel temperature measurement, structure comparatively simplifies, reduce instrument volume, reduce and manufacture and use cost, each check point has identical compensation precision, thus reaches testing result comparatively accurately.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further described.
Fig. 1 is the utility model systematic schematic diagram;
Fig. 2 is signalling channel gating unit circuit diagram.
Embodiment
Fig. 1 is the utility model systematic schematic diagram, and Fig. 2 is signalling channel gating unit circuit diagram; The multi-channel temperature measurement system of the present embodiment, comprising:
Temperature detecting unit, the multiple temperature sensors being distributed in multiple temperature detecting point for correspondence are for detecting and obtaining the temperature parameter of measured point;
A temperature compensation unit, the temperature parameter for receiving temperature detecting unit go forward side by side trip temperature compensate;
Signalling channel gating unit, exports the signal of multiple temperature sensor and selects a selection conducting to temperature compensation unit;
Central control unit, for receiving temperature parameter that temperature compensation unit transmits and sending selection ON command to signal transmission unit;
Certainly, can also be used for input command and output audio and vision signal by external input-output unit, such as keyboard, touch-screen, display etc., do not repeat them here; Temperature compensation unit can adopt different different types according to the different temperature sensor selected, and does not repeat them here; Central control unit can be a simple single-chip microcomputer, can be also pc machine, select as required, generally adopt single-chip microcomputer.
In the present embodiment, described signalling channel gating unit comprises:
Switch element, for multiple Switch Controller should be connected between multiple temperature sensor and temperature compensation unit, for opening and closing temperature parameter transmission channel; Switch can be conventional relays, light coupling relay etc., requires to have less internal resistance, to realize passing through of small electrical signals;
Channel control unit, for receiving the order of central control unit and sending to switch element and select an ON command to multiple switch; For optionally open-close on-off, export detected temperature signal to center-control light unit to realize one of them temperature sensor.
In the present embodiment, multi-channel temperature measurement system also comprises:
Communication unit, the data parameters received by central control unit passes to host computer; Host computer is generally computer, stores for receiving data, or also can be used for sending control command.
In the present embodiment, described temperature sensor is K type thermopair; Temperature compensation unit is the chip MAX6675 to K type thermocouple cold junction compensation; The chip MAX6675 that cold junction compensation for K type thermopair adopts MAX company to release for the cold junction compensation of K type thermopair, cold junction compensation can not only be carried out to K type thermopair, the digital signal that simultaneously electromotive force signal that K type thermopair produces at corresponding temperature can also be converted to 12 exports, single-chip microcomputer is facilitated to process it, and control mode also fairly simple convenience.
In the present embodiment, described switch is light coupling relay; Channel control unit is the code translator for selecting a selection conducting to multiple light coupling relay; What the present embodiment adopted is that a code translator is combined the object reaching multiplexer channel and measure with multiple light coupling relay, to be different from prior art a code translator multiple temperature-compensated chip of arranging in pairs or groups and to complete the structure that cold junction compensation and the numerical value conversion of each road thermopair are exported, while simplifying structure, ensure measuring accuracy; Each coding of code translator can only have one to hold the corresponding low level of output, the electromotive force signal that the K type thermopair that the channel conductive making the LED lighting of the light coupling relay inside of corresponding passage make corresponding transmits this passage produces gives chip MAX6675 process, other pathway closure, and follow-up continuation is selected.
In the present embodiment, described central control unit exports and is connected with display unit; The TFT chromatic liquid crystal screen of one piece 2.8 cun that display unit adopts, its resolution is 320*240; At the real-time temperature values that display screen display main information is each paths of multi-channel temperature measurement, and the current concrete time.
In the present embodiment, described communication unit is PL2303 serial communication chip, and described host computer is PC; The PL2303 serial communication chip that communication module adopts, is connected the communication of central control unit and host computer (PC), is sent on PC by the temperature data detected in real time, and then saves as text mode by after PC process by this chip; Chip PL2303 internal USB function control device, USB transceiver, oscillator and the UART with whole modem control signal, only need external several electric capacity just can realize the conversion of usb signal and RS232 signal, can conveniently be embedded into various equipment; This device is as USB/RS232 bidirectional transducer, and one side receives usb data from main frame and is converted into RS232 information flow form and sends to peripheral hardware; Be converted to usb data form from RS232 peripheral hardware reception data on the other hand and send back main frame.
Light coupling relay is ac30s [okita], and conducting internal resistance is little, the loss that the faint electromotive force signal avoiding this K type thermopair to export is more; Described code translator is 74HC154, is four to ten six code translators; Central control unit signal is connected with clock chip DS1302, for low-power consumption real-time timepiece chip, it can to year, month, day, week, time, minute, second carries out timing, and has leap year compensation and waits several functions, structure and the principle of work of this model chip do not repeat them here; As shown in Figure 2, have in the connection between light coupling relay and 74HC154 code translator and control mode Fig. 2 and clearly represent, do not repeat them here.
In the present embodiment, multi-channel temperature measurement system is eight road system for detecting temperature, and the temperature sensor of described temperature detecting point and correspondence is eight.
What finally illustrate is, above embodiment is only in order to illustrate the technical solution of the utility model and unrestricted, although be described in detail the utility model with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify to the technical solution of the utility model or equivalent replacement, and not departing from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of right of the present utility model.

Claims (8)

1. a multi-channel temperature measurement system, is characterized in that: comprising:
Temperature detecting unit, the multiple temperature sensors being distributed in multiple temperature detecting point for correspondence are for detecting and obtaining the temperature parameter of measured point;
A temperature compensation unit, the temperature parameter for receiving temperature detecting unit go forward side by side trip temperature compensate;
Signalling channel gating unit, exports the signal of multiple temperature sensor and selects a selection conducting to temperature compensation unit;
Central control unit, for receiving temperature parameter that temperature compensation unit transmits and sending selection ON command to signal transmission unit.
2. multi-channel temperature measurement system according to claim 1, is characterized in that: described signalling channel gating unit comprises:
Switch element, for multiple Switch Controller should be connected between multiple temperature sensor and temperature compensation unit, for opening and closing temperature parameter transmission channel;
Channel control unit, for receiving the order of central control unit and sending to switch element and select an ON command to multiple switch.
3. multi-channel temperature measurement system according to claim 2, is characterized in that: multi-channel temperature measurement system also comprises:
Communication unit, the data parameters received by central control unit passes to host computer.
4. multi-channel temperature measurement system according to claim 3, is characterized in that: described temperature sensor is K type thermopair; Temperature compensation unit is the chip MAX6675 to K type thermocouple cold junction compensation.
5. multi-channel temperature measurement system according to claim 4, is characterized in that: described switch is light coupling relay; Channel control unit is the code translator for selecting a selection conducting to multiple light coupling relay.
6. multi-channel temperature measurement system according to claim 5, is characterized in that: described central control unit exports and is connected with display unit.
7. multi-channel temperature measurement system according to claim 6, is characterized in that: described communication unit is PL2303 serial communication chip, and described host computer is PC; Light coupling relay is okita ac30s, and described code translator is 74HC154; Central control unit signal is connected with clock chip DS1302.
8. the multi-channel temperature measurement system according to the arbitrary claim of claim 1 to 7, is characterized in that: multi-channel temperature measurement system is eight road system for detecting temperature, and the temperature sensor of described temperature detecting point and correspondence is eight.
CN201520072490.6U 2015-02-02 2015-02-02 Multi-channel temperature measurement system Expired - Fee Related CN204594593U (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105241370A (en) * 2015-10-19 2016-01-13 桂林电子科技大学 Cubic press health monitoring method and system
CN109976404A (en) * 2017-12-27 2019-07-05 佛山希望数码印刷设备有限公司 Multipoint heating temperature control system and control method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105241370A (en) * 2015-10-19 2016-01-13 桂林电子科技大学 Cubic press health monitoring method and system
CN105241370B (en) * 2015-10-19 2019-01-04 桂林电子科技大学 Cubic hydraulic press health monitor method and system
CN109976404A (en) * 2017-12-27 2019-07-05 佛山希望数码印刷设备有限公司 Multipoint heating temperature control system and control method

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150826

Termination date: 20180202

CF01 Termination of patent right due to non-payment of annual fee