CN107219462B - electric quantity real-time monitoring circuit - Google Patents
electric quantity real-time monitoring circuit Download PDFInfo
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- CN107219462B CN107219462B CN201710309445.1A CN201710309445A CN107219462B CN 107219462 B CN107219462 B CN 107219462B CN 201710309445 A CN201710309445 A CN 201710309445A CN 107219462 B CN107219462 B CN 107219462B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/3644—Constructional arrangements
- G01R31/3646—Constructional arrangements for indicating electrical conditions or variables, e.g. visual or audible indicators
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
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- Tests Of Electric Status Of Batteries (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a real-time electric quantity monitoring circuit, which belongs to the technical field of battery detection and comprises a current sampling circuit, a timing monitoring circuit and an output resistance circuit, wherein the current sampling circuit is respectively connected with a battery to be detected and the timing monitoring circuit; the output resistance circuit comprises an analog switch chip and a plurality of resistors, the resistors are connected in series to form a resistor string, two ends of the resistor string are connected with the detection port, the control end of the analog switch chip is connected with the timing monitoring circuit, and the switch end of the analog switch chip is connected with the resistors in parallel in sequence. The invention adopts the singlechip intelligent technology to monitor the residual energy of the battery in real time, realizes the on-line acquisition of the residual energy value of the battery by a simple means, solves the problem that the consumed power and the residual service time of the equipment power supply battery cannot be determined, and provides reliable guarantee for the smooth operation of exploration engineering.
Description
Technical Field
the invention belongs to the technical field of battery detection, and particularly relates to a real-time electric quantity monitoring circuit.
Background
the battery is the power supply energy of the detector circuit, and considering that the detector has a long shelf life and a large number of used detectors, and the replacement of the battery is very inconvenient, therefore, when the detector is designed, the battery with large energy is mostly adopted, so that the battery is not replaced in the shelf life. However, the field operation environment of exploration engineering is complex, the standard capability of operators is different, and the illegal use of the detector can be avoided, so that the waste of battery energy is caused, and the service life of the battery is shortened. Because the engineering period of geological exploration, particularly petroleum exploration, is longer, namely dozens of days, and is longer than months, the residual energy and the residual service time of a detector power supply battery are required to be determined at any time before or during the beginning of the engineering so as to ensure the smooth operation of the exploration engineering, and measures can be taken conveniently in time. The field condition of exploration engineering is poor, and the detection means is lack. Therefore, the remaining service time of the power supply battery cannot be judged, and great uncertainty is brought to the smooth operation of the whole exploration project.
in order to ensure the characteristics of stable voltage power supply, low power consumption, small volume, large energy and one-time non-charging in the whole working period, the detector is generally powered by lithium batteries or lithium manganese batteries and the like. Another feature of li-ya or li-mn batteries, which is distinguished from other disposable batteries, is the near right angle shape of the discharge characteristic curve, as shown in fig. 1. In the figure, the output voltage of the lithium subcell is nearly constant throughout the active power supply time. The amplitude of the output voltage of the battery is kept within the effective power supply time, the maximum dynamic range of the circuit can be guaranteed, but due to the uniqueness of the output voltage of the lithium sub-battery, the power consumption of the battery cannot be estimated by testing the output voltage of the battery like other batteries.
disclosure of Invention
in view of the above, the invention designs and completes an electric quantity real-time monitoring circuit, which can realize the on-line acquisition of the residual electric quantity value of the battery by a simple means, solve the problem that the consumed electric quantity and the residual service time of the equipment power supply battery cannot be determined, and provide reliable guarantee for the smooth operation of exploration engineering.
The invention solves the problems through the following technical means:
the utility model provides an electric quantity real-time supervision circuit which characterized in that, includes current sampling circuit, timing monitoring circuit and output resistance circuit, wherein:
The current sampling circuit is respectively connected with the battery to be detected and the timing monitoring circuit, and the output resistance circuit is respectively connected with the timing monitoring circuit and the detection port;
the output resistance circuit comprises an analog switch chip and a plurality of resistors, the resistors are connected in series to form a resistor string, the two ends of the resistor string are connected with the detection port, the control end of the analog switch chip is connected with the timing monitoring circuit, and the switch end of the analog switch chip is connected with the resistors in parallel in sequence.
Further, the current sampling circuit comprises a sampling resistor, and the sampling resistor is connected in series in a power supply circuit of the detected battery.
Further, the timing monitoring circuit comprises a PIC16F type single chip microcomputer, and the PIC16F type single chip microcomputer is connected with a sampling resistor through an A/D converter.
Further, the output resistance circuit comprises a TS12A44515 type analog switch chip, a control end of the TS12A44515 type analog switch chip is sequentially connected with a PIC16F type singlechip I/O output port, and a switch end of the TS12A44515 type analog switch chip is sequentially and independently connected with a plurality of resistors in parallel.
a real-time electric quantity monitoring circuit calculates the used time and the residual used time of a battery by adopting a variable frequency timing method, and the variable frequency timing method adjusts the timing frequency of a monitoring chip in a current sampling circuit according to the numerical value of the output current of the detected battery so as to accurately calculate the used time and the residual used time of the detected battery.
Further, the frequency conversion timing method specifically comprises the following steps:
1) The electric quantity real-time monitoring circuit starts to work;
2) the timing monitoring circuit acquires the output current value of the detected battery through the A/D conversion module and the current sampling circuit;
3) Setting different timing frequencies of the timing monitoring circuit according to the battery output current value acquired in real time;
4) Accumulating the used time of the battery according to different timing frequencies;
5) Subtracting the used time calculated in the step from the calibrated total service life time of the detected battery to obtain the remaining service time of the battery;
6) the timing monitoring circuit realizes short circuit of different resistors by controlling the analog switch chip in the output resistor circuit according to the remaining service time of the battery so as to change the total resistance value of the resistor string.
further, the setting of different timing frequencies of the timing monitoring circuit according to the real-time collected battery output current value includes the following corresponding relationship:
When the output current of the battery is a rated value I, the timing monitoring circuit performs timing according to a normal timing frequency f;
When the output current of the battery is 1.5 to 2.5 times of the rated value I, the timing monitoring circuit times according to the value of 2 times of the normal timing frequency f;
When the output current of the battery is 2.5 to 3.5 times of the rated value I, the timing monitoring circuit times according to the value of 3 times of the normal timing frequency f;
When the output current of the battery is (N-0.5) to (N +0.5) times of the rated value I, the timing monitoring circuit clocks according to the value N times of the normal timing frequency f, wherein N is greater than or equal to 4 and is a positive integer.
further, the rated value I of the battery output current is 0.2A, and the normal timing frequency f of the timing monitoring circuit is 5 MHZ.
The electric quantity real-time monitoring circuit has the following beneficial effects:
The invention adopts the singlechip intelligent technology to monitor the residual energy of the battery in real time, realizes the on-line acquisition of the residual energy value of the battery by a simple means, solves the problem that the consumed power and the residual service time of the equipment power supply battery cannot be determined, and provides reliable guarantee for the smooth operation of exploration engineering.
The working principle of the electric quantity real-time monitoring circuit provided by the invention is as follows:
the normal working current of the detector is A (muA), the rated capacity of the battery is B (Ah), the effective power supply life time under the condition of the normal working current can be estimated to be H, wherein: h = B/A. The conversion can be carried out to conveniently obtain the time of the effective service life, such as year, month and the like. The technical scheme provided by the invention has the following technical characteristics:
1, adjusting the timing multiplying power according to the numerical value of the output current of the battery, and realizing accurate metering.
The normal static use current of the detector is A, but if a user does not operate according to the instruction, abnormal (illegal use) use is possible, and when the detector is abnormally used, the power consumption current can be multiplied, so that the power consumption of the battery is multiplied. The power consumption current of the detector can be monitored in real time by using software and a current sampling comparison circuit, the service life time can be calculated according to different multiplying powers of current sizes in sections (normal quiescent current, normal dynamic current, abnormal bump and drop current), for example, when the current is in an abnormal state, such as 2A, 3A, 10A and the like, the frequency of an internal timing clock is controlled to reach 2f, 3f, 10f and the like by using the software, so that the service life time statistics of the battery power consumption can be respectively carried out. And the used electric quantity and the remaining use time of the battery are calculated by the internal software according to the accumulated calculated electric power consumption.
2 intelligently controlling the output resistance of the detector to realize real-time monitoring of the residual energy of the battery
By timing, the service condition of the battery can be reflected in real time. But must be indicated by the output interface information. For example, the conventional battery detection circuit can directly indicate the remaining power usage time through the display terminal. Due to the special requirements of the construction environment of the detector, the information of the battery used by the detector is inconvenient to directly display through interface information. Aiming at the function of monitoring the output resistance of the detector adopted by the seismometer in the initial detection of the detector in exploration engineering, the technology adopts the singlechip to output real-time logic information according to the real-time condition of electric quantity, and changes the output combined resistance of the detector according to the battery use condition information through internal intelligent control by controlling simulation combination. The tester can measure different output resistance values of the tester through a seismometer or a resistance testing instrument to know the used time of the battery and judge the remaining used time.
3. software implemented timing or countdown
The service life of the battery is represented by the effective service life of the battery, the micro-processing chip of the single chip microcomputer is used for controlling software to monitor in real time, and the time is counted in the effective time of the battery, so that the used time and the residual electric quantity service time of the battery can be conveniently obtained. When the service life of the battery is up, the battery is under-voltage to alarm in real time.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic of lithium subcell voltage as a function of time;
FIG. 2 is a schematic diagram of a circuit structure of a real-time power monitoring circuit according to the present invention;
FIG. 3 is a schematic diagram of a circuit for real-time monitoring of electrical quantity according to the present invention;
FIG. 4 is a flow chart of a frequency conversion timing method of a real-time electric quantity monitoring circuit according to the present invention;
fig. 5 is a table showing the corresponding relationship between the output resistances of the real-time power monitoring circuit according to the present invention.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
The present invention will be described in detail below with reference to the accompanying drawings.
as shown in fig. 2, a real-time electric quantity monitoring circuit includes a current sampling circuit, a timing monitoring circuit and an output resistor circuit, wherein: the current sampling circuit is respectively connected with the battery to be detected and the timing monitoring circuit, and the output resistance circuit is respectively connected with the timing monitoring circuit and the detection port; the output resistance circuit comprises an analog switch chip and a plurality of resistors, the resistors are connected in series to form a resistor string, the two ends of the resistor string are connected with the detection port, the control end of the analog switch chip is connected with the timing monitoring circuit, and the switch end of the analog switch chip is connected with the resistors in parallel in sequence.
specifically, as shown in fig. 3, the current sampling circuit includes a sampling resistor, and the sampling resistor is connected in series in a power supply circuit of the battery to be detected. The timing monitoring circuit comprises a PIC16F type single chip microcomputer, and the PIC16F type single chip microcomputer is connected with a sampling resistor through an A/D converter. The output resistance circuit comprises a TS12A44515 type analog switch chip, the control end of the TS12A44515 type analog switch chip is sequentially connected with an I/O output port of a PIC16F type single chip microcomputer, and the switch end of the TS12A44515 type analog switch chip is sequentially and independently connected with a plurality of resistors in parallel.
It should be noted that R is a current sampling resistor, and forms a current sampling circuit together with the a/D converter inside the single chip. The current of the battery loop forms voltage on the R, the CPU monitors the voltage, the voltage is converted into a digital signal through AD, and after comparison is realized through software, a section with the current is determined. After the single chip microcomputer is monitored and calculated, the single chip microcomputer outputs C1 and C2 … Cn logic signals to control the switch combination of a plurality of analog switches TS44515 (T1-Tn), so that the purpose of changing the output resistance is achieved.
As shown in fig. 4, a real-time electric quantity monitoring circuit employs a variable frequency timing method, which adjusts the timing frequency of a monitoring chip in a current sampling circuit according to the value of the output current of a battery to be detected, so as to accurately calculate the used time and the remaining used time of the battery to be detected.
Further, the frequency conversion timing method specifically comprises the following steps:
1) The electric quantity real-time monitoring circuit starts to work;
2) the timing monitoring circuit acquires the output current value of the detected battery through the A/D conversion module and the current sampling circuit;
3) Setting different timing frequencies of the timing monitoring circuit according to the battery output current value acquired in real time;
4) accumulating the used time of the battery according to different timing frequencies;
5) Subtracting the used time calculated in the step from the calibrated total service life time of the detected battery to obtain the remaining service time of the battery;
6) the timing monitoring circuit realizes short circuit of different resistors by controlling the analog switch chip in the output resistor circuit according to the remaining service time of the battery so as to change the total resistance value of the resistor string.
The technical scheme provided by the invention is that the value of the variable output resistance value directly reflects the residual service life of the battery. The resistance corresponds to the service life as follows: taking the all-weather service life of the battery as 2 years as an example, the table shows the correspondence between the used time and the remaining used time of the battery and the output resistance of the detector in fig. 5.
further, the setting of different timing frequencies of the timing monitoring circuit according to the real-time collected battery output current value includes the following corresponding relationship:
When the output current of the battery is a rated value I, the timing monitoring circuit performs timing according to a normal timing frequency f;
When the output current of the battery is 1.5 to 2.5 times of the rated value I, the timing monitoring circuit times according to the value of 2 times of the normal timing frequency f;
When the output current of the battery is 2.5 to 3.5 times of the rated value I, the timing monitoring circuit times according to the value of 3 times of the normal timing frequency f;
When the output current of the battery is (N-0.5) to (N +0.5) times of the rated value I, the timing monitoring circuit clocks according to the value N times of the normal timing frequency f, wherein N is greater than or equal to 4 and is a positive integer.
Further, the rated value I of the battery output current is 0.2A, and the normal timing frequency f of the timing monitoring circuit is 5 MHZ.
In addition, a current sampling circuit is added to a battery circuit for supplying power to the detector to operate. The single chip microcomputer monitors the working current of the detector in real time, and calculates the real-time power consumption according to the current and the working time. And the consumed energy, the residual energy and the residual service time can be calculated according to the total energy of the battery. The real-time information can be indicated by direct display (liquid crystal, etc.) or by changing the resistance value of the detector output. The seismograph or the resistance test instrument (such as a digital multimeter) obtains information by testing the output resistance of the detector.
the electric quantity real-time monitoring circuit has the following beneficial effects:
the invention adopts the singlechip intelligent technology to monitor the residual energy of the battery in real time, realizes the on-line acquisition of the residual energy value of the battery by a simple means, solves the problem that the consumed power and the residual service time of the equipment power supply battery cannot be determined, and provides reliable guarantee for the smooth operation of exploration engineering.
finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (6)
1. The utility model provides an electric quantity real-time supervision circuit which characterized in that, includes current sampling circuit, timing monitoring circuit and output resistance circuit, wherein:
The current sampling circuit is respectively connected with the battery to be detected and the timing monitoring circuit, and the output resistance circuit is respectively connected with the timing monitoring circuit and the detection port;
the output resistance circuit comprises an analog switch chip and a plurality of resistors, the resistors are connected in series to form a resistor string, two ends of the resistor string are connected with the detection port, the control end of the analog switch chip is connected with the timing monitoring circuit, and the switch end of the analog switch chip is connected with the resistors in parallel in sequence;
the used time and the residual used time of the battery are calculated by adopting a variable frequency timing method, and the variable frequency timing method adjusts the timing frequency of a monitoring chip in a current sampling circuit according to the numerical value of the output current of the detected battery so as to accurately calculate the used time and the residual used time of the detected battery;
The frequency conversion timing method specifically comprises the following steps:
1) The electric quantity real-time monitoring circuit starts to work;
2) the timing monitoring circuit acquires the output current value of the detected battery through the A/D conversion module and the current sampling circuit;
3) setting different timing frequencies of the timing monitoring circuit according to the battery output current value acquired in real time;
4) accumulating the used time of the battery according to different timing frequencies;
5) Subtracting the used time calculated in the step from the calibrated total service life time of the detected battery to obtain the remaining service time of the battery;
6) the timing monitoring circuit realizes short circuit of different resistors by controlling the analog switch chip in the output resistor circuit according to the remaining service time of the battery so as to change the total resistance value of the resistor string.
2. the real-time electricity quantity monitoring circuit according to claim 1, wherein the current sampling circuit comprises a sampling resistor, and the sampling resistor is connected in series in a power supply circuit of the detected battery.
3. The real-time electricity quantity monitoring circuit of claim 2, wherein the timing monitoring circuit comprises a PIC16F type single chip microcomputer, and the PIC16F type single chip microcomputer is connected with a sampling resistor through an A/D converter.
4. the electric quantity real-time monitoring circuit according to claim 3, wherein the output resistor circuit comprises a TS12A44515 type analog switch chip, a control end of the TS12A44515 type analog switch chip is sequentially connected with a PIC16F type singlechip I/O output port, and a switch end of the TS12A44515 type analog switch chip is sequentially and independently connected with a plurality of resistors in parallel.
5. the real-time electric quantity monitoring circuit according to claim 1, wherein the setting of different timing frequencies of the timing monitoring circuit according to the real-time collected battery output current value comprises the following correspondence relationship:
when the output current of the battery is a rated value I, the timing monitoring circuit performs timing according to a normal timing frequency f;
When the output current of the battery is 1.5 to 2.5 times of the rated value I, the timing monitoring circuit times according to the value of 2 times of the normal timing frequency f;
When the output current of the battery is 2.5 to 3.5 times of the rated value I, the timing monitoring circuit times according to the value of 3 times of the normal timing frequency f;
When the output current of the battery is (N-0.5) to (N +0.5) times of the rated value I, the timing monitoring circuit clocks according to the value N times of the normal timing frequency f, wherein N is greater than or equal to 4 and is a positive integer.
6. The real-time electricity quantity monitoring circuit according to claim 5, wherein the rated value I of the battery output current is 0.2A, and the normal timing frequency f of the timing monitoring circuit is 5 MHZ.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710309445.1A CN107219462B (en) | 2017-05-04 | 2017-05-04 | electric quantity real-time monitoring circuit |
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| CN201710309445.1A CN107219462B (en) | 2017-05-04 | 2017-05-04 | electric quantity real-time monitoring circuit |
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| CN107219462A CN107219462A (en) | 2017-09-29 |
| CN107219462B true CN107219462B (en) | 2019-12-10 |
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| CN108196202A (en) * | 2018-02-23 | 2018-06-22 | 南京飞腾电子科技有限公司 | A kind of monitoring method of electrical energy meter electricity tankage |
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| CN102565708A (en) * | 2010-11-29 | 2012-07-11 | 深圳富泰宏精密工业有限公司 | Battery capacity detection system |
| CN104237806A (en) * | 2014-10-20 | 2014-12-24 | 上海空间电源研究所 | Voltage sampling device, system and method of battery cell of lithium-ion battery pack |
| CN105259494A (en) * | 2015-10-27 | 2016-01-20 | 北京新能源汽车股份有限公司 | Testing device and method for battery equalization circuit |
| CN105576304A (en) * | 2016-02-29 | 2016-05-11 | 中国人民解放军武汉军械士官学校 | Battery pack management system and battery pack management method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5932488B2 (en) * | 2012-05-30 | 2016-06-08 | ルネサスエレクトロニクス株式会社 | Voltage monitoring module and voltage monitoring system |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102565708A (en) * | 2010-11-29 | 2012-07-11 | 深圳富泰宏精密工业有限公司 | Battery capacity detection system |
| CN104237806A (en) * | 2014-10-20 | 2014-12-24 | 上海空间电源研究所 | Voltage sampling device, system and method of battery cell of lithium-ion battery pack |
| CN105259494A (en) * | 2015-10-27 | 2016-01-20 | 北京新能源汽车股份有限公司 | Testing device and method for battery equalization circuit |
| CN105576304A (en) * | 2016-02-29 | 2016-05-11 | 中国人民解放军武汉军械士官学校 | Battery pack management system and battery pack management method |
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Granted publication date: 20191210 |