CN202836819U - Multi-channel temperature acquisition circuit of intelligent electric power monitor - Google Patents
Multi-channel temperature acquisition circuit of intelligent electric power monitor Download PDFInfo
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- CN202836819U CN202836819U CN 201220451914 CN201220451914U CN202836819U CN 202836819 U CN202836819 U CN 202836819U CN 201220451914 CN201220451914 CN 201220451914 CN 201220451914 U CN201220451914 U CN 201220451914U CN 202836819 U CN202836819 U CN 202836819U
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Abstract
The utility model discloses a multi-channel temperature acquisition module of an intelligent electric power monitor. The multi-channel temperature acquisition module of the intelligent electric power monitor is characterized in that the multi-channel temperature acquisition module is arranged outside a terminal MCU main circuit; the multi-channel temperature acquisition module comprises a power supply circuit, a temperature measurement circuit and a memory; the input end of the power supply circuit is connected with a power supply of the electric power monitor; two groups of power supply are output; one group provides working power supply for a probe circuit, and the other group provides working power supply for the temperature measurement circuit and the memory; the temperature measurement circuit comprises a probe selection circuit and a temperature acquisition circuit; the input end of the probe selection circuit is electrically connected with the output end of the probe circuit, and the output end is electrically connected with the input end of the temperature acquisition circuit; the temperature acquisition circuit is bidirectionally and electrically connected with the terminal MCU main circuit; and the memory is electrically connected with the temperature acquisition circuit. The temperature measurement circuit is placed outside the terminal MCU main circuit as an independent circuit of the electric power monitor, thus multiple functions of multi-channel temperature measurement, temperature measurement calibration, data preservation and the like are realized.
Description
Technical field
The utility model relates to the multiplex temperature collection circuit of intelligent energy monitor instrument.
Technical background
Electric supervising device is multifunction power attributional analysis table, and it is multi-functional that it has gathered high precision measurement, demonstration, Long-distance Control, computer interconnection and multiple power quality analysis etc., can measure to show multiple electric weight and power quality parameter.In complicated now electric power environmental, the function of basic electrical measurement (electricity consumption and power supply) not only is provided, more provide relevant power quality data to improve for power quality and analyze.
In a whole set of energy management system, the energy monitor acquisition terminal is in system's least significant end, be used for gathering power information on the user power utilization circuit, comprise voltage, electric current, power, electric weight, harmonic wave, temperature etc., and pass concentrator or main website back by wired or wireless channel.
Temperature acquisition is the part during terminal data gathers, and it is a relatively independent parameter, can not have influence on the normal operation of terminal, but it can bring to the environment at scene more fully feedback.Temperature acquisition mainly is for the measurement of indoor temperature and heat alert.
Under existing technology, temperature measurement circuit is integrated in the terminating circuit, because temperature measurement circuit is subject to the impact of site environment easily, therefore can threaten the whole circuit of terminal.The use of temp sensing function is also dumb convenient.And also to some extent restriction of thermometric way under the impact of cost.The analog variation amount that traditional thermometric mode is measured temperature probe transfers in the sample circuit of monitor terminal, calculates temperature value after then being transformed to digital quantity again.The method part that comes with some shortcomings in actual applications:
1. outside temperature probe is exposed to, touch easily interference in various degree, the normal operation meeting of electric energy detection terminal is exerted an influence, even can cause damage;
2. owing to the relation of cost, can not realize the circuit of polylith sampling A/D chip, therefore to some extent restriction on the thermometric way;
3. thermometric is a relatively independently function, but traditional temperature measurement circuit is often integrated with the terminal main circuit, does not so in use just have dirigibility, and is also inconvenient in maintenance process.
Summary of the invention
The utility model is the multiplex temperature collection circuit of the intelligent energy monitor instrument that provides in order to overcome the problems referred to above that prior art exists, can reach intelligent, independence and the security of temp sensing function, thereby under the background that at present energy resource consumption is accelerated, cooperate the trend of growing management of power use demand, and form the perfect management system of a cover.
In order to solve above problem, the technical scheme that the utility model is taked is: the multiplex temperature collection module of intelligent power monitor, and described energy monitor instrument comprises terminal MCU main circuit, power supply and probe circuit; Be characterized in that described multiplex temperature collection module is arranged on outside the described terminal MCU main circuit, this multiplex temperature collection module comprises, power circuit, temperature measurement circuit, storer; Wherein: the input end of described power circuit is connected with the power supply of energy monitor instrument, and it exports two groups of power supplys, one group of working power that provides probe circuit, and another group provides the working power of temperature measurement circuit and storer; Described temperature measurement circuit comprises probe selection circuit and a temperature collection circuit; Described probe selects the input end of circuit to be electrically connected with the output terminal of described probe circuit, and its output terminal is electrically connected with the input end of described temperature collection circuit, described temperature collection circuit and two-way electrical connection of described terminal MCU main circuit; Described storer is electrically connected with described temperature collection circuit.
The multiplex temperature collection module of above-mentioned intelligent power monitor, wherein, described multiplex temperature collection module is an independently module, realizes that by an interface and described terminal MCU main circuit plug-in is connected.
The multiplex temperature collection module of above-mentioned intelligent power monitor wherein, also comprises a photoelectric isolating circuit, and described photoelectric isolating circuit is connected electrically between terminal MCU main circuit and the temperature measurement circuit.
The multiplex temperature collection module of above-mentioned intelligent power monitor, wherein, described photoelectric isolating circuit comprises two photoelectrical couplers, one of them photoelectrical coupler is connected between the input end of the output terminal of described terminal MCU main circuit and described temperature collection circuit, and another photoelectrical coupler is connected between the output terminal of the input end of described terminal MCU main circuit and described temperature collection circuit.
The multiplex temperature collection module of above-mentioned intelligent power monitor, wherein, described temperature collection circuit is made of a MCU single-chip microcomputer.
The multiplex temperature collection module of above-mentioned intelligent power monitor, wherein, described probe selects circuit to be made of a MUX.
The multiplex temperature collection module of above-mentioned intelligent power monitor, wherein, described probe circuit is made of a plurality of thermistors.
The multiplex temperature collection module of above-mentioned intelligent power monitor, wherein, described probe circuit also comprises safety protective circuit, is made of a plurality of Transient Suppression Diodes.
The multiplex temperature collection module of above-mentioned intelligent power monitor, wherein, the Transient Suppression Diode that each thermistor of described probe circuit in parallel is two-way; This thermistor and the two ends of the transient voltage suppressor paralleling unidirectional Transient Suppression Diode of respectively connecting.
The multiplex temperature collection module of above-mentioned intelligent power monitor, wherein, described power circuit is made of two groups of low pressure difference linear voltage regulators, exports two groups of power supplys.
Because the utility model has adopted above technical scheme, the technique effect of its generation is obvious:
1, with temperature measurement circuit as one independently circuit be put into outside the terminal MCU main circuit of energy monitor instrument, temp sensing function no longer depends on terminal MCU main circuit, but realizes temp sensing function by another MCU separately.Because independently MCU design so that the resource of MCU is abundant, can more be considered for temp sensing function.Therefore the several functions such as multi-route measuring temperature, thermometric calibration, data preservation can have been realized;
2, the modularization of temperature measurement circuit makes temp sensing function use more flexibly.Can add arbitrarily the removal temp sensing function according to the actual demand at scene.The characteristic of plug and play is aspect safeguarding, it is more convenient also to seem, need not to consider that terminal just can change;
3, the reinforcement of safeguard measure is so that temperature measurement circuit is more safe and reliable at the scene.Even the unexpected fault that produces occurs, also can not involve terminal;
4, settle safety device in the porch of temperature probe place in circuit, can transient absorption when the external world produces the impact of the high stream of high pressure, thus the circuit component of guaranteeing the back is avoided the high-octane impact of transient state and is damaged;
5, the voltage step-down that adopts two groups of low pressure difference linear voltage regulators that terminal is supplied with is that two-way voltage uses, to be distinguished for the voltage of thermometric and the operating voltage of other chips, and when ectocine causes thermometric voltage to suffer damage, also can not be involved the power supply of other components and parts of circuit;
6, communicating by letter between the MCU of terminal MCU main circuit and temperature measurement circuit, control, isolation adopt photoelectric isolating device to realize.
Description of drawings
Fig. 1 is the electrical block diagram of a kind of embodiment of the utility model general structure.
Fig. 2 is the electrical schematic diagram of a kind of embodiment of the utility model.
Fig. 3 is the electrical block diagram of the another kind of embodiment of the utility model general structure.
Embodiment
See also Fig. 1.The multiplex temperature collection module of the utility model intelligent power monitor, described energy monitor instrument comprises terminal MCU main circuit 1 and probe circuit 2.Described multiplex temperature collection module 3 is independently modules that are arranged on beyond the described terminal MCU main circuit, comprise, power circuit 31,, temperature measurement circuit 32, storer 33; Wherein: the input end of described power circuit 31 is connected with the power supply of energy monitor instrument, and it exports two groups of power supplys, one group of working power that provides probe circuit, and another group provides the working power of temperature measurement circuit and storer.Described temperature measurement circuit 32 comprises probe selection circuit 321 and a temperature collection circuit 322; Described probe selects the input end of circuit to be electrically connected with the output terminal of described probe circuit, and its output terminal is electrically connected with the input end of described temperature collection circuit, described temperature collection circuit and two-way electrical connection of described terminal MCU main circuit.Described storer 33 is electrically connected with described temperature collection circuit.Also comprise a photoelectric isolating circuit 4, described photoelectric isolating circuit is arranged between terminal MCU main circuit and the temperature measurement circuit.
See also Fig. 2, Fig. 2 is the electrical schematic diagram of a kind of embodiment of the present utility model.In the present embodiment, X1～X3 is 3 tunnel external temperature probes (can add as required way and mostly be 8 tunnel most), and described temperature probe for example is made of thermistor, in their form access thermometric short circuits with two-wire system.In order to prevent the impact of voltage, probe circuit described in the utility model also comprises safety protective circuit, is made of a plurality of Transient Suppression Diode TVS pipes.F1～F9 is protection device in the present embodiment, has adopted the combination of two-way TVS pipe SMBJ6.0CA and unidirectional TVS pipe SMBJ5.0A.In the present embodiment, the Transient Suppression Diode F1 that thermistor X1 in parallel is two-way, unidirectional Transient Suppression Diode F2, a F3 respectively connects for this thermistor and the two ends of transient voltage suppressor paralleling; The Transient Suppression Diode F4 that thermistor X2 in parallel is two-way, unidirectional Transient Suppression Diode F5, a F6 respectively connects for this thermistor and the two ends of transient voltage suppressor paralleling; The Transient Suppression Diode F7 that thermistor X3 in parallel is two-way, unidirectional Transient Suppression Diode F8, a F9 respectively connects for this thermistor and the two ends of transient voltage suppressor paralleling.Because the TVS pipe is a kind of novel efficient circuits protection device, it has response time (subnanosecond level) and the quite high surge absoption ability that is exceedingly fast.When the high energy impact events of moment is stood at its two ends; the TVS pipe can become Low ESR to the resistance value between two ends by high impedance with high speed; to absorb an instantaneous large-current; its both end voltage strangulation on a predetermined numerical value, thereby the circuit component of protection back is not subjected to the impact of high voltage transient spike.
Power circuit described in the utility model is made of two groups of low pressure difference linear voltage regulator W, and for example model is SPX1121.The Voltage-output that these two groups of low pressure difference linear voltage regulators are supplied with the terminal power supply is divided into two-way, and wherein, VCC_A is the operating voltage for temperature measurement circuit and other chips, and VCC_B is the voltage source for probe circuit.
In the present embodiment, in the described temperature measurement circuit, described temperature collection circuit is made of a MCU single-chip microcomputer U1.Described probe selects circuit to be made of a MUX U2.Wherein the MCU of temperature collection circuit is the LPC1111 that adopts based on ARM Cortex-M0 framework, by its directly control store and MUX, and the sampling of finishing the temperature simulation amount.The described MUX of present embodiment adopts eight tunnels analogy MUX 74HC4051, and the MCU control by temperature collection circuit is switched path arbitrarily, reaches the purpose that multi way temperature is sampled.
Described storer U3 for example adopts chip 25VF020 to consist of the data that are used for preserving thermometric checking parameter and temperature acquisition.
The multiplex temperature collection module of the utility model intelligent power monitor also comprises a photoelectric isolating circuit.In the present embodiment, described photoelectric isolating circuit comprises two photoelectrical coupler D6, D7, wherein photoelectrical coupler D6 is connected between the input end of the output terminal of described terminal MCU main circuit and described temperature collection circuit, photoelectrical coupler D7 is connected between the output terminal of the input end of described terminal MCU main circuit and described temperature collection circuit, is used for isolating the MCU of terminal MCU main circuit and temperature measurement circuit.
Principle of work of the present utility model is: outside temperature probe records temperature and selectively is added to temperature collection circuit by MUX, this temperature collection circuit is to be made of the MCU single-chip microcomputer, obtain real-time temperature data through its computing, the terminal master MCU that is transferred to again this energy monitor instrument processes.
Multiplex temperature collection module described in the utility model is the circuit of an independence outside terminal MCU main circuit 100, can adopt the method that directly is connected with photoelectric isolating circuit.Also can adopt described multiplex temperature collection module is made an independently module, be connected with terminal MCU main circuit plug-in.
See also Fig. 3, Fig. 3 is the electrical block diagram of the another kind of embodiment of the utility model general structure.Present embodiment comprises a probe circuit 5, a multiplex temperature collection module 6 and an energy monitor instrument main frame 7, and this described probe circuit 5, a multiplex temperature collection module 6 and an energy monitor instrument main frame 7 are a module independently.Wherein, described energy monitor instrument main frame 7 comprises photoelectric isolating circuit 71, terminal MCU main circuit 72, power supply 73, other functional circuits 74.Be connected by the interface plug-in between described multiplex temperature collection module 6 and the main frame 7.Connect for the ease of implementing plug-in, present embodiment connects an interface 81 at the input end of described multiplex temperature collection module, and this interface is used for being connected with the plug-in of probe circuit.Output terminal in the multiplex temperature collection module connects an interface 82, this interface be used for this computer-controlled monitoring instrument main frame 7 between plug-in be connected.
Because temperature collect module of the present utility model is an independently circuit, and whole external probe has protection, therefore, even extraneous have the impact of burst also can make in its scope that is limited to expectation, can not damage device.Again because the inside of this module is the dual power supply design, the external used power supply of the used power supply of thermometric and side circuit independence separately, it also is that the photoelectricity isolation is arranged that temperature measurement circuit intercoms mutually with terminal MCU, therefore, both guaranteed the accuracy of temperature acquisition, guaranteed that again the energy monitor instrument is not subjected to the impact of external shock signal, improved the reliability that the energy monitor instrument uses.
Claims (10)
1. the multiplex temperature collection module of intelligent power monitor, described energy monitor instrument comprises terminal MCU main circuit, power supply and probe circuit; It is characterized in that described multiplex temperature collection module is arranged on outside the described terminal MCU main circuit, this multiplex temperature collection module comprises, power circuit, temperature measurement circuit, storer; Wherein:
The input end of described power circuit is connected with the power supply of energy monitor instrument, and it exports two groups of power supplys, one group of working power that provides probe circuit, and another group provides the working power of temperature measurement circuit and storer;
Described temperature measurement circuit comprises probe selection circuit and a temperature collection circuit; Described probe selects the input end of circuit to be electrically connected with the output terminal of described probe circuit, and its output terminal is electrically connected with the input end of described temperature collection circuit, described temperature collection circuit and two-way electrical connection of described terminal MCU main circuit;
Described storer is electrically connected with described temperature collection circuit.
2. the multiplex temperature collection module of intelligent power monitor according to claim 1 is characterized in that, described multiplex temperature collection module is an independently module, realizes that by an interface and described terminal MCU main circuit plug-in is connected.
3. the multiplex temperature collection module of intelligent power monitor according to claim 1 and 2 is characterized in that, also comprises a photoelectric isolating circuit, and described photoelectric isolating circuit is connected electrically between terminal MCU main circuit and the temperature measurement circuit.
4. the multiplex temperature collection module of intelligent power monitor according to claim 3, it is characterized in that, described photoelectric isolating circuit comprises two photoelectrical couplers, one of them photoelectrical coupler is connected between the input end of the output terminal of described terminal MCU main circuit and described temperature collection circuit, and another photoelectrical coupler is connected between the output terminal of the input end of described terminal MCU main circuit and described temperature collection circuit.
5. the multiplex temperature collection module of intelligent power monitor according to claim 1 is characterized in that, described temperature collection circuit is made of a MCU single-chip microcomputer.
6. the multiplex temperature collection module of intelligent power monitor according to claim 1 is characterized in that, described probe selects circuit to be made of a MUX.
7. the multiplex temperature collection module of intelligent power monitor according to claim 1 is characterized in that, described probe circuit is made of a plurality of thermistors.
8. the multiplex temperature collection module of intelligent power monitor according to claim 7 is characterized in that, described probe circuit also comprises safety protective circuit, is made of a plurality of Transient Suppression Diodes.
9. the multiplex temperature collection module of intelligent power monitor according to claim 8 is characterized in that, the Transient Suppression Diode that each thermistor of described probe circuit in parallel is two-way; This thermistor and the two ends of the transient voltage suppressor paralleling unidirectional Transient Suppression Diode of respectively connecting.
10. the multiplex temperature collection module of intelligent power monitor according to claim 1 is characterized in that, described power circuit is made of two groups of low pressure difference linear voltage regulators, exports two groups of power supplys.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220451914 CN202836819U (en) | 2012-09-06 | 2012-09-06 | Multi-channel temperature acquisition circuit of intelligent electric power monitor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220451914 CN202836819U (en) | 2012-09-06 | 2012-09-06 | Multi-channel temperature acquisition circuit of intelligent electric power monitor |
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| CN202836819U true CN202836819U (en) | 2013-03-27 |
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| CN 201220451914 Expired - Fee Related CN202836819U (en) | 2012-09-06 | 2012-09-06 | Multi-channel temperature acquisition circuit of intelligent electric power monitor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103616545A (en) * | 2013-11-25 | 2014-03-05 | 国网安徽省电力公司滁州供电公司 | Multifunctional low-voltage testing instrument |
| CN106404220A (en) * | 2016-02-23 | 2017-02-15 | 中国烟草总公司广东省公司 | Barn temperature monitoring device |
| CN106404583A (en) * | 2016-02-23 | 2017-02-15 | 中国烟草总公司广东省公司 | System for monitoring weight of tobacco leaves in flue-curing barn based on weight monitoring device |
| CN106442866A (en) * | 2016-02-23 | 2017-02-22 | 中国烟草总公司广东省公司 | Flue-curing barn humidity monitoring device |
| CN106441526A (en) * | 2016-02-23 | 2017-02-22 | 中国烟草总公司广东省公司 | Intelligent tobacco leaf weight monitoring device |
-
2012
- 2012-09-06 CN CN 201220451914 patent/CN202836819U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103616545A (en) * | 2013-11-25 | 2014-03-05 | 国网安徽省电力公司滁州供电公司 | Multifunctional low-voltage testing instrument |
| CN106404220A (en) * | 2016-02-23 | 2017-02-15 | 中国烟草总公司广东省公司 | Barn temperature monitoring device |
| CN106404583A (en) * | 2016-02-23 | 2017-02-15 | 中国烟草总公司广东省公司 | System for monitoring weight of tobacco leaves in flue-curing barn based on weight monitoring device |
| CN106442866A (en) * | 2016-02-23 | 2017-02-22 | 中国烟草总公司广东省公司 | Flue-curing barn humidity monitoring device |
| CN106441526A (en) * | 2016-02-23 | 2017-02-22 | 中国烟草总公司广东省公司 | Intelligent tobacco leaf weight monitoring device |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130327 Termination date: 20190906 |
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| CF01 | Termination of patent right due to non-payment of annual fee |