CN213241075U - Equipment power monitoring system - Google Patents
Equipment power monitoring system Download PDFInfo
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- CN213241075U CN213241075U CN202022182788.6U CN202022182788U CN213241075U CN 213241075 U CN213241075 U CN 213241075U CN 202022182788 U CN202022182788 U CN 202022182788U CN 213241075 U CN213241075 U CN 213241075U
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Abstract
The utility model discloses an equipment power monitoring system, include: the device comprises a CPU control unit, a data conversion unit, a switch switching unit, an external power supply voltage monitoring unit and a clock unit; the CPU control unit can switch on and off the switch switching unit according to the external power supply voltage monitoring data and the working condition feedback of the industrial control equipment, so that whether the industrial control equipment is electrified or not is controlled.
Description
Technical Field
The utility model relates to a power monitoring field, in particular to equipment power monitoring system.
Background
At present, most power supply monitoring systems, such as a watchdog, are implemented in industrial control equipment, and the power supply on-off of the equipment is controlled by an MCU (microprogrammed control Unit), so that on one hand, the function must be designed in the system in the design process, the existing equipment cannot be modified in the later period, and on the other hand, the voltage of a power supply cannot be monitored; and after the equipment is powered off, the equipment immediately enters a slow power-on state, the power-off time cannot be controlled, and the on-off time cannot be set regularly.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an equipment power monitoring system aims at solving the problem that above-mentioned background art mentioned.
In order to achieve the above object, the utility model provides an equipment power monitoring system, include: the device comprises a CPU control unit, a data conversion unit, a switch switching unit, an external power supply voltage monitoring unit and a clock unit;
the CPU control unit is provided with a CPU, the switch switching unit is provided with a power input end, a power output end and a signal control end, the power input end is used for being connected with an external power supply, the power output end is used for being connected with industrial control equipment, the signal control end is connected with the CPU, a data transmission unit is further arranged between the CPU and the industrial control equipment, and the CPU controls the on-off of the switch switching unit according to data information of the data transmission unit;
the external power supply voltage monitoring unit is arranged between the CPU and the external power supply, and the CPU controls the on-off of the switch switching unit according to the feedback information of the external power supply voltage monitoring unit;
the clock unit is connected with the CPU, and the CPU performs timed on-off on the switch switching unit according to the clock unit and preset time.
Optionally, the switch switching unit is provided with a first MOS transistor and a second MOS transistor, a gate of the first MOS transistor is connected to the pin 28 of the CPU, a source of the first MOS transistor is grounded, a drain of the first MOS transistor is connected to a gate of the second MOS transistor, a source of the second MOS transistor is connected to an output end of an external power supply, a drain of the second MOS transistor is used for connecting the industrial control device, and a drain of the second MOS transistor is connected to a source;
the external power supply voltage monitoring unit is provided with an operational amplifier, the positive input end of the operational amplifier is connected with the external power supply, and the negative input end and the output end of the operational amplifier are connected with a pin 15 of the CPU;
the data conversion unit is provided with an auxiliary chip and a USB interface, the USB interface is connected with a pin 15 and a pin 16 of the auxiliary chip, the USB interface is used for connecting a data transmission interface of the industrial control equipment, and the auxiliary chip is connected with the CPU.
Optionally, the switch switching unit is further provided with an RC slow power-up circuit, the RC slow power-up circuit includes a first current-limiting resistor and a first capacitor, one end of the first capacitor is connected to the external power supply and the source electrode of the first MOS transistor, the other end of the first capacitor is connected to the first current-limiting resistor, the other end of the first current-limiting resistor is connected to the drain electrode of the first MOS transistor, and the gate of the second MOS transistor is connected to the middle position of the first capacitor and the first current-limiting resistor.
Optionally, the switch switching unit further includes a third MOS transistor, a gate of the third MOS transistor is connected to a drain of the first MOS transistor, a source of the third MOS transistor is used for connecting an external power supply, and a drain of the third MOS transistor is used for connecting industrial control equipment.
Optionally, the drain of the third MOS transistor is further provided with a power management chip, and an output pin of the power management chip is provided with a filter circuit and a 5V power output end.
Optionally, the clock unit is provided with a clock chip, and the clock chip is connected with the CPU.
The technical proposal of the utility model is that a monitoring system is arranged between an external power supply and industrial control equipment, so that the hardware design of the original equipment can not be changed, thereby greatly saving time, labor and capital cost; the utility model adopts the technical proposal that the device comprises a CPU control unit, a data conversion unit, a switch switching unit, an external power supply voltage monitoring unit and a clock unit, the controlled device can transmit the self condition to the CPU unit, and the CPU control unit can make whether the power-off process is needed according to the condition; the controlled device can trigger the CPU control unit at fixed time, the CPU control unit can judge whether the controlled device is dead or abnormal in work according to the mechanism, whether power-off and power-on operations are needed, and power-off time can be set according to user requirements; the external power supply of the controlled equipment is monitored in real time, and the power-off protection can be actively carried out when the voltage of the external power supply is abnormal; and the clock function can set the on-off time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a block diagram of an embodiment of the present invention;
FIG. 2 is a circuit diagram of the switch unit of FIG. 1;
FIG. 3 is a circuit diagram of a CPU of the CPU control unit of FIG. 1;
fig. 4 is a circuit diagram of an auxiliary chip of the CPU control unit of fig. 1.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | |
200 | |
| 300 | |
400 | External power supply voltage detection unit |
| 500 | Clock unit | C1 | First capacitor |
| C2 | Second capacitor | R1 | A first current limiting resistor |
| R2 | Second current limiting resistor | M1 | First MOS transistor |
| M2 | Second MOS transistor | M3 | Third MOS transistor |
| U1 | CPU | U2 | Auxiliary chip |
| U3 | Power management chip | U4 | Operational amplifier |
| U5 | Crystal oscillator |
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is 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 at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides an equipment power monitoring system.
In the embodiment of the present invention, as shown in fig. 1, the power monitoring system of the device includes: a CPU control unit 100, a data conversion unit 300, a switch switching unit 200, an external power supply voltage monitoring unit 400, and a clock unit 500. The switch switching unit 200 is provided with a power input end, a power output end and a signal control end, wherein the power input end is used for connecting an external power supply, the power output end is used for connecting industrial control equipment, the signal control end is connected with a CPU, and a data transmission unit is further arranged between the CPU and the industrial control equipment; when the industrial control equipment works, the industrial control equipment transmits real-time data of the industrial control equipment, such as working voltage, power and temperature energy data, to the CPU, the CPU judges whether the data are abnormal or not after receiving the data, if the data are abnormal, the CPU controls the switch switching unit 200 to be switched off, and the power supply to the industrial control equipment is stopped, so that the industrial control equipment is prevented from being in an abnormal working state all the time;
an external power supply voltage monitoring unit 400 is arranged between the CPU and the external power supply, the external power supply voltage monitoring unit 400 can monitor external power supply data in real time, such as voltage stability, when the external voltage is greatly reduced, the monitoring data is sent to the CPU, then the CPU timely disconnects the switch switching unit 200 according to the monitoring data of the external power supply, and stops supplying power to the industrial control equipment, so that the industrial control equipment is prevented from being damaged due to the abnormality of the external power supply;
the clock unit 500 is connected with the CPU, the CPU performs timed on-off on the switch switching unit 200 according to the clock unit 500 and preset time, and the clock unit 500 is set, so that on one hand, the industrial control equipment can be set to send feedback data to the CPU at regular time for the CPU to confirm whether the industrial control equipment is abnormal or not, if the feedback of the industrial control equipment is not received within the preset time, the industrial control equipment can be judged to be abnormal, and the power is cut off and the power is shut down in time; on the other hand, the CPU can also be set at the preset working time of the industrial control equipment, and when the working time of the industrial control equipment reaches the preset working time, the automatic power-off and the shutdown are carried out, so that the use of a user is facilitated.
Further, referring to fig. 2, fig. 3, and fig. 4, in the present embodiment:
as shown in fig. 3, the CPU U1 uses the following models: STM32F103C8T6, the clock chip adopts 32.768KHz 30ppm crystal oscillator U5 as clock source, two output terminals of crystal oscillator U5 connect pin 3 and pin 4 of CPU U1;
as shown in fig. 2, the switching unit 200 has two MOS transistors: the first MOS transistor M1 adopts an N-channel MOS transistor with the model number of AS2306, and the second MOS transistor M2 adopts a P-channel MOS transistor with the model number of NCE01P 13K;
specifically, the external power supply adopts 12V voltage, the gate of the first MOS transistor M1 is connected to the pin 28 of the CPU U1, the source of the first MOS transistor M1 is grounded, the drain of the first MOS transistor M1 is connected to the gate of the second MOS transistor M2, the source of the second MOS transistor M2 is connected to the output end of the external power supply, the drain of the second MOS transistor M2 is used for connecting industrial control equipment, and the drain of the second MOS transistor M2 is connected to the source; further, the switch switching unit 200 is further provided with an RC slow power-up circuit, which specifically includes a first capacitor C1 and a first current-limiting resistor R1, one end of the first capacitor C1 is connected to an external power supply and the source of the first MOS transistor M1, the other end of the first capacitor C1 is connected to the first current-limiting resistor R1, the other end of the first current-limiting resistor R1 is connected to the drain of the first MOS transistor M1, and the gate of the second MOS transistor M2 is connected to the middle position of the first capacitor C1 and the first current-limiting resistor;
as shown in fig. 4, the auxiliary chip U2 has the following model: the FT232RL is connected with a pin 15 and a pin 16 of an auxiliary chip U2 through a USB interface, a pin 20 of an auxiliary chip U2 is connected with a 3.3V power supply voltage acting working power supply, and industrial control equipment is connected with the auxiliary chip U2 through the USB interface;
when the device is powered on, firstly, the MB _ PWR pin 28 of the CPU U1 outputs high level, a power supply channel of the industrial control device is opened, a slow power-on design is used in the design, the resistance value of a first current limiting resistor R1 is 100K, and the capacitance value of a first capacitor C1 is 10UF time constant: t ═ R ═ C ═ 100K ═ 10UF ═ 1S. When the device is switched on, the device is slowly powered up in 1S;
the industrial control equipment starts the starting operation, and after the controlled equipment is started, the industrial control equipment starts to send data to the auxiliary chip U2 through the USB interface at regular time, the CPU U1 receives the data to analyze, if the data is normal data, the single chip microcomputer clears the timer, and does not act on the power switch. If the correct data is not obtained in the specified time, the CPU U1 considers that the controlled industrial control equipment has an abnormal or dead halt phenomenon;
the device starts the following operation, pin 28 of CPU U1 is connected to first MOS transistor M1, and is used as a switch to control the on/off of the 12V power supply, MB _ PWR pin 28 outputs a low level, first MOS transistor M1 is turned off, the gate voltage of second MOS transistor M2 is equal to the source power supply, second MOS transistor M2 is in the off state, the power supply is turned off, the controlled device is in the power-down state, after 10S delay, MB _ PWR pin 28 outputs a high level, first MOS transistor M1 is turned on, the gate voltage of second MOS transistor M2 is 0V, second MOS transistor M2 is turned on, and the device is slowly powered on;
as shown in fig. 3, the external power voltage monitoring unit 400 is provided with an operational amplifier U4 with model number TP324-SR, a first voltage-dividing resistor and a second voltage-dividing resistor are provided between the operational amplifier U4 and the external power supply, a forward input pin 2 of the operational amplifier U4 is connected between the first voltage-dividing resistor and the second voltage-dividing resistor, a pin 4 is connected with 3.3V power voltage, a pin 3 is grounded, and a pin 1 and a pin 5 are connected with a pin 15 of the CPU U1; after the equipment is powered on, the operational amplifier U4 divides the voltage from the external power supply to send the bias voltage to the pin 15 of the CPU U1, if the external power supply voltage is not abnormal, the equipment works normally, if the external power supply voltage is abnormal, the CPU U1 controls the switch to be switched off through the pin 28, and when the external power supply returns to be normal, the power supply to the industrial control equipment is restored again.
Further, referring to fig. 2, in the embodiment of the present invention, the switch switching unit 200 further includes a third MOS transistor M3, the third MOS transistor M3 is a P-channel MOS transistor, the type of the third MOS transistor M3 is identical to that of the second MOS transistor M2, the gate of the third MOS transistor M3 is connected to the drain of the first MOS transistor M1, the source of the third MOS transistor M3 is connected to the external power supply 12V, the drain of the third MOS transistor M3 is connected to the industrial control device, the drain of the third MOS transistor M3 is also connected to the power management chip U3, the type of the power management chip U3 is SY8105ADC, an RC slow power-up circuit is also disposed between the third MOS transistor M3 and the external power supply, and includes a second capacitor C2 and a second current limiting resistor R2, one end of the second capacitor C2 is connected to the external power supply 12V and the source of the third MOS transistor M2, the other end of the second capacitor C2 is connected to the second current limiting resistor R2, and the drain of the second current limiting resistor M1, the gate of the third MOS transistor M3 is connected between the second capacitor C2 and the second current limiting resistor R2; an input pin 4 of a power management chip U3 is connected with a drain electrode of a third MOS tube M3, a pin 3 of a power management chip U3 is grounded, and a pin 5 is externally connected with a filter circuit and outputs 5V for supplying power to industrial control equipment, so that the equipment power monitoring system can be used for equipment with 12V power supply and equipment with 5V power supply, meanwhile, because the second MOS tube M2 and the third MOS tube M3 are both controlled by a first MOS tube M1, namely the pin 28 of a CPU U1 is connected with the first MOS tube M1 and used as a switch for controlling the on-off of 12V and 5V power supplies, the pin 28 outputs low level, the first MOS tube M1 is cut off, the grid voltages of the second MOS tube M2 and the third MOS tube M3 are equal to the source power supply, the second MOS tube M2 and the third MOS tube M3 are in a cut-off state, the 12V and 5V power supplies are cut off, the controlled equipment is in a power-off state, and the pin 28 outputs high level after 10S is delayed, the first MOS transistor M1 is turned on, the gate voltages of the second MOS transistor M2 and the third MOS transistor M3 are 0V, the second MOS transistor M2 and the third MOS transistor M3 are both turned on, and the 12V and 5V devices are slowly powered on. Therefore, the monitoring system can control a plurality of industrial control devices with different rated voltages at the same time, and is convenient for users to use.
The technical proposal of the utility model is that a monitoring system is arranged between an external power supply and industrial control equipment, so that the hardware design of the original equipment can not be changed, thereby greatly saving time, labor and capital cost; the technical scheme of the utility model comprises a CPU control unit 100, a data conversion unit 300, a switch switching unit 200, an external power supply voltage monitoring unit and a clock unit 500, the controlled device can transmit the self condition to the CPU, and the CPU control unit 100 can make whether the power-off processing is needed according to the condition; the controlled device can trigger the CPU control unit 100 at regular time, and the CPU control unit 100 can also determine whether the controlled device is dead or works abnormally according to the mechanism, and whether power-off and power-on operations are required, and power-off time can be set according to user requirements; the external power supply of the controlled equipment is monitored in real time, and the power-off protection can be actively carried out when the voltage of the external power supply is abnormal; and the clock function can set the on-off time. And a universal USB interface is used for data communication, so that the device is wide in application range.
The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (6)
1. An equipment power monitoring system, comprising: the device comprises a CPU control unit, a data conversion unit, a switch switching unit, an external power supply voltage monitoring unit and a clock unit;
the CPU control unit is provided with a CPU, the switch switching unit is provided with a power input end, a power output end and a signal control end, the power input end is used for being connected with an external power supply, the power output end is used for being connected with industrial control equipment, the signal control end is connected with the CPU, a data transmission unit is further arranged between the CPU and the industrial control equipment, and the CPU controls the on-off of the switch switching unit according to data information of the data transmission unit;
the external power supply voltage monitoring unit is arranged between the CPU and the external power supply, and the CPU controls the on-off of the switch switching unit according to the feedback information of the external power supply voltage monitoring unit;
the clock unit is connected with the CPU, and the CPU performs timed on-off on the switch switching unit according to the clock unit and preset time.
2. The device power monitoring system according to claim 1, wherein the switch switching unit is provided with a first MOS transistor and a second MOS transistor, a gate of the first MOS transistor is connected to the pin 28 of the CPU, a source of the first MOS transistor is grounded, a drain of the first MOS transistor is connected to a gate of the second MOS transistor, a source of the second MOS transistor is connected to an output terminal of an external power supply, a drain of the second MOS transistor is used for connecting the industrial control device, and a drain and a source of the second MOS transistor are connected;
the external power supply voltage monitoring unit is provided with an operational amplifier, the positive input end of the operational amplifier is connected with the external power supply, and the negative input end and the output end of the operational amplifier are connected with a pin 15 of the CPU;
the data conversion unit is provided with an auxiliary chip and a USB interface, the USB interface is connected with a pin 15 and a pin 16 of the auxiliary chip, the USB interface is used for connecting a data transmission interface of the industrial control equipment, and the auxiliary chip is connected with the CPU.
3. The device power monitoring system according to claim 2, wherein the switch switching unit further includes an RC slow power-up circuit, the RC slow power-up circuit includes a first current-limiting resistor and a first capacitor, one end of the first capacitor is connected to the external power source and the source of the first MOS transistor, the other end of the first capacitor is connected to the first current-limiting resistor, the other end of the first current-limiting resistor is connected to the drain of the first MOS transistor, and the gate of the second MOS transistor is connected to the middle position of the first capacitor and the first current-limiting resistor.
4. The device power monitoring system according to claim 2, wherein the switching unit further comprises a third MOS transistor, a gate of the third MOS transistor is connected to a drain of the first MOS transistor, a source of the third MOS transistor is used for connecting an external power supply, and a drain of the third MOS transistor is used for connecting an industrial control device.
5. The device power monitoring system of claim 4, wherein the drain of the third MOS transistor is further provided with a power management chip, and an output pin of the power management chip is provided with a filter circuit and a 5V power output terminal.
6. The device power monitoring system of claim 1, wherein the clock unit is provided with a clock chip, and the clock chip is connected with the CPU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022182788.6U CN213241075U (en) | 2020-09-29 | 2020-09-29 | Equipment power monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022182788.6U CN213241075U (en) | 2020-09-29 | 2020-09-29 | Equipment power monitoring system |
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| Publication Number | Publication Date |
|---|---|
| CN213241075U true CN213241075U (en) | 2021-05-18 |
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| CN202022182788.6U Active CN213241075U (en) | 2020-09-29 | 2020-09-29 | Equipment power monitoring system |
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- 2020-09-29 CN CN202022182788.6U patent/CN213241075U/en active Active
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