Voltage frequency monitoring alarm system

Abstract

The utility model provides a voltage frequency monitoring alarm system. The system comprises a control module, and a monitoring input module, a buzzing alarm module, a light indication module and a power supply module which are connected with the control module, wherein the power supply module supplies power to the monitoring input module, the buzzing alarm module and the light indication module at the same time. According to the invention, the current transformer unit senses the frequency change of the voltage to be monitored, the photoelectric coupler unit is utilized to form the DC pulse voltage for the control module to carry out frequency monitoring, and the buzzing alarm module and the light indication module are further combined to realize the acousto-optic display of the frequency monitoring result. By using a simple system structure, rapid and effective output voltage frequency monitoring can be realized, the condition that the voltage frequency is unstable can be reflected in time, and the downstream equipment fault problem caused by voltage frequency fluctuation can be prevented.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of frequency monitoring, in particular to a voltage frequency monitoring and alarming system. BACKGROUND

[0002] Frequency monitoring has a wide range of applications in the field of electronics. For example: frequency monitoring in wireless communication systems is crucial to ensure stable and accurate transmission of signals. Whether it is mobile communication or satellite communication, the control and monitoring of frequency is the key to ensuring communication quality; in audio and video processing, frequency monitoring can be used to monitor the frequency and pitch of sound waveforms, and can also be used to monitor video frame rate and signal frequency; in medical diagnosis, frequency monitoring is used to measure the frequency of heartbeats, the frequency of pulses, and other physiological signals, as well as the operating frequency of medical equipment, which is one of the important means to ensure the normal operation of medical equipment; in military equipment, the running dynamics of the equipment itself and the monitoring and analysis of enemy electromagnetic wave signals can be monitored. However, in actual application, the monitoring frequency often causes the detection result to be distorted due to the unstable frequency of the voltage output, and even causes the downstream equipment to malfunction due to the fluctuation of the voltage frequency. CONTENT OF THE UTILITY MODEL

[0003] The purpose of the embodiments of the present disclosure is to provide a voltage frequency monitoring and alarming system to solve the problems existing in the prior art.

[0004] The embodiments of the present disclosure adopt the following technical solutions: a voltage frequency monitoring and alarming system at least includes a control module, and a monitoring input module, a buzzer alarming module, a light indication module and a power module connected with the control module, the power module simultaneously supplies power to the monitoring input module, the buzzer alarming module and the light indication module; the monitoring input module at least includes a current transformer unit, a voltage reduction and amplitude reduction unit and an optoelectronic coupler unit connected in sequence, wherein the current transformer unit is used to generate a mutual inductance voltage according to the frequency of the voltage to be monitored, the mutual inductance voltage is input to the input end of the optoelectronic coupler unit after being processed by the voltage reduction and amplitude reduction unit, so that the output end of the optoelectronic coupler unit outputs a direct current pulse voltage; the control module performs frequency monitoring of the voltage according to the direct current pulse voltage, and drives the light indication module and / or the buzzer alarming module according to the monitoring result to indicate the frequency change of the voltage to be monitored.

[0005] In some embodiments, the monitoring input module at least includes: a current transformer, a rectifier diode, a transient voltage suppression diode, first to fourth resistors, and an optocoupler; wherein a primary side of the current transformer is connected with an output end of a voltage to be monitored, one end of a secondary side of the current transformer is connected with one end of the fourth resistor, a negative electrode of the transient voltage suppression diode, and a positive electrode of the rectifier diode, the other end of the secondary side is connected with the other end of the fourth resistor, a positive electrode of the transient voltage suppression diode, the other end of the third resistor, and the other end of the second resistor, a negative electrode of the rectifier diode is connected with a first pin of the optocoupler, one end of the third resistor is connected with a second pin of the optocoupler, a third pin of the optocoupler is connected with one end of the second resistor and leads an output end of the monitoring input module, and a fourth pin of the optocoupler is connected with the first resistor in series and then connected with an output end of the power module.

[0006] In some embodiments, the buzzer alarm module at least includes: a buzzer and a driving transistor; wherein a power supply end of the buzzer is connected with an output end of the power module, a control end of the buzzer is connected with a drain electrode of the driving transistor, a source electrode of the driving transistor is grounded, and a gate electrode of the driving transistor is connected with a buzzer alarm pin of the control module as an input end of the buzzer alarm module.

[0007] In some embodiments, the driving transistor is an N-type transistor.

[0008] In some embodiments, the light indication module at least includes: first to fourth indicator lights and sixth to ninth resistors; wherein all the indicator lights are light emitting diodes, positive electrodes of all the light emitting diodes are connected with an output end of the power module, a negative electrode of the first indicator light is connected with the sixth resistor in series and then grounded, the second indicator light is connected with the seventh resistor in series and then leads a first control end, a negative electrode of the third indicator light is connected with the eighth resistor in series and then leads a second control end, and a negative electrode of the fourth indicator light is connected with the ninth resistor in series and then leads a third control end.

[0009] In some embodiments, the control module at least includes a single-chip microcomputer with a model number of STC8G1K08, a 20th pin of the single-chip microcomputer is connected with an output end of the monitoring input module, a 1st pin of the single-chip microcomputer is connected with an input end of the buzzer alarm module, an 8th pin of the single-chip microcomputer is connected with an output end of the power module, 3rd, 4th, and 9th pins of the single-chip microcomputer are respectively connected with the third control end, the second control end, and the first control end of the light indication module, and a 10th pin of the single-chip microcomputer is grounded.

[0010] In some embodiments, the single-chip microcomputer is specifically configured to: receive the direct current pulse voltage, trigger PCA counting when the direct current pulse voltage jumps from high level to low level, and stop counting when the direct current pulse voltage jumps from low level to high level; determine the capture pulse width time according to the counting value and the time length of each counting; determine the frequency of the voltage to be monitored according to the capture pulse width time; compare the frequency of the voltage to be monitored with the preset frequency, and drive the light indication module and / or the buzzer alarm module in combination with the comparison result.

[0011] In some embodiments, when the frequency of the voltage to be monitored is the same as the preset frequency, the single-chip microcomputer drives the 9th pin to ground, so that the second indicator light is lit; when the frequency of the voltage to be monitored is higher than the preset frequency, the single-chip microcomputer drives the 4th pin to ground, so that the third indicator light is lit, and outputs an alarm signal to the buzzer alarm module through the 1st pin, so that the buzzer alarms; when the frequency of the voltage to be monitored is lower than the preset frequency, the single-chip microcomputer drives the 3rd pin to ground, so that the fourth indicator light is lit, and outputs an alarm signal to the buzzer alarm module through the 1st pin, so that the buzzer alarms.

[0012] In some embodiments, the power supply is a lithium battery.

[0013] The voltage frequency monitoring and alarming system has the following advantages: the frequency change of the voltage to be monitored is sensed by the current transformer unit, the direct current pulse voltage is formed by the optoelectronic coupler unit for the control module to perform frequency monitoring, the sound and light display of the frequency monitoring result is realized in combination with the buzzer alarm module and the light indication module, the output voltage frequency monitoring is quickly and effectively realized by using a simple system structure, the voltage frequency instability is timely reflected, and the downstream equipment failure problem caused by voltage frequency fluctuation is prevented. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of one or more embodiments of the present specification or the prior art, the drawings needed in the embodiment or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the specification, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0015] Figure 1 FIG. 1 is a structural schematic diagram of a voltage frequency monitoring and alarming system in the present embodiment;

[0016] Figure 2 Circuit diagram for monitoring input module in the embodiment;

[0017] Figure 3 Circuit diagram for buzzer alarm module in the embodiment;

[0018] Figure 4 Circuit diagram for light indication module in the embodiment;

[0019] Figure 5 Circuit diagram for control module in the embodiment;

[0020] Figure 6 Circuit diagram for power module in the embodiment. DETAILED DESCRIPTION

[0021] In order to enable personnel in the technical field to better understand the technical solutions in one or more embodiments of the present specification, the technical solutions in one or more embodiments of the present specification will be described clearly and completely in conjunction with the drawings in one or more embodiments of the present specification. Obviously, the described embodiments are only part of the embodiments of the present specification, not all. Based on one or more embodiments of the present specification, all other embodiments obtained by those of ordinary skill in the art without creative labor should fall within the scope of protection of the present document.

[0022] Frequency monitoring has a wide range of applications in the electronic field. For example: frequency monitoring in wireless communication systems is crucial to ensure stable and accurate signal transmission. Whether it is mobile communication or satellite communication, frequency control and monitoring are the key to ensuring communication quality; in audio and video processing, frequency monitoring can be used to monitor the frequency and pitch of sound waveforms, and can also be used to monitor video frame rate and signal frequency; in medical diagnosis, frequency monitoring is used to measure the frequency of heartbeats, the frequency of pulses, and other physiological signals, as well as the operating frequency of medical equipment, which is one of the important means to ensure the normal operation of medical equipment; in military equipment, the running dynamics of the equipment itself and the monitoring and analysis of enemy electromagnetic wave signals can be monitored. However, in actual application, the monitoring frequency often causes the detection result to be distorted due to unstable frequency of voltage output, and even causes the downstream equipment to malfunction due to fluctuation of voltage frequency. In the prior art, voltage frequency monitoring is often performed by methods such as zero-crossing point-based detection, phase-locked loop-based detection, digital signal processor-based detection, or artificial intelligence-based detection, but these methods require high hardware costs and have slow response speed to frequency changes of the voltage, and cannot achieve fast and timely monitoring result feedback.

[0023] In order to solve the above problems, the embodiment of the present disclosure provides a voltage frequency monitoring alarm system for monitoring the frequency of the voltage output by the upstream electronic device and alarming when the frequency of the voltage does not meet the requirements. Figure 1 The structural diagram of the voltage frequency monitoring alarm system is shown, which mainly comprises a control module 10 and a monitoring input module 20, a buzzer alarm module 30, a light indication module 40 and a power module 50 connected with the control module 10. The power module 50 simultaneously supplies power to the monitoring input module 20, the buzzer alarm module 30 and the light indication module 40. Specifically, the monitoring input module 20 at least comprises a current transformer unit 21, a voltage reduction and amplitude reduction unit 22 and an optocoupler unit 23 connected in sequence, wherein the current transformer unit 21 is used to generate a mutual inductance voltage according to the frequency of the voltage to be monitored. The mutual inductance voltage is input to the input end of the optocoupler unit 23 after being processed by the voltage reduction and amplitude reduction unit 22, so that the output end of the optocoupler unit 23 outputs a direct current pulse voltage. The control module 10 monitors the frequency of the voltage according to the direct current pulse voltage, and drives the light indication module 40 and the buzzer alarm module 30 according to the monitoring result to indicate the change of the voltage frequency.

[0024] Figure 2 The circuit principle diagram of the monitoring input module 20 is shown. As shown in Figure 2 The monitoring input module at least comprises a current transformer U3, a transient voltage suppression diode D1, a rectifier diode D2, first to fourth resistors and an optocoupler U2. The primary side of the current transformer U3 is connected with the output end of the voltage to be monitored. One end of the secondary side of the current transformer U3 is connected with one end of the fourth resistor R4, the negative electrode of the transient voltage suppression diode D1 and the positive electrode of the rectifier diode D2. The other end of the secondary side is connected with the other end of the fourth resistor R4, the positive electrode of the transient voltage suppression diode D1, the other end of the third resistor R3 and the other end of the second resistor R2. The negative electrode of the rectifier diode D2 is connected with the first pin of the optocoupler U2. One end of the third resistor R3 is connected with the second pin of the optocoupler U2. The third pin of the optocoupler U2 is connected with one end of the second resistor R2 and leads out the output end of the monitoring input module 20. The fourth pin of the optocoupler U2 is connected with the output end of the power module 50 in series with the first resistor R1.

[0025] Specifically, the current transformer U3 and the fourth resistor R4 constitute a current transformer unit 21, the current transformer U3 induces a mutual inductance current formed by a voltage to be monitored, and the mutual inductance current forms a mutual inductance voltage after flowing through the fourth resistor R4; the transient voltage suppression diode D1, the rectifier diode D2 and the third resistor R3 form a voltage reduction and amplitude reduction unit 22 to reduce and reduce the amplitude of the mutual inductance voltage; the optocoupler unit 23 includes the optocoupler U2, the first resistor R1 and the second resistor R2, the 1 pin and the 2 pin of the optocoupler U2 are the positive and negative poles of the light-emitting diode in the optocoupler, and the light-emitting diode is driven to light up based on the mutual inductance voltage after the voltage reduction and amplitude reduction, and the 3 pin and the 4 pin of the optocoupler U2 are the two ends of the photodiode, and the photodiode is turned on to generate a direct current pulse voltage GATHER when the light-emitting diode is lighted up.

[0026] The circuit principle diagram of the buzzer alarm module 30 is shown in Figure 3 The circuit principle diagram of the buzzer alarm module 30 is shown in

[0027] Figure 4 The circuit principle diagram of the light indication module 40 is shown, which at least includes the first to fourth indication lamps and the sixth to ninth resistors. Specifically, all the indication lamps are light-emitting diodes, and the positive poles of all the light-emitting diodes are connected to the output end of the power module 50. The negative pole of the first indication lamp LED1 is connected to the sixth resistor R6 and then grounded. The second indication lamp LED2 is connected to the seventh resistor R7 in series and then a first control end K1 is led out. The negative pole of the third indication lamp LED3 is connected to the eighth resistor R8 in series and then a second control end K2 is led out. The negative pole of the fourth indication lamp LED4 is connected to the ninth resistor R9 in series and then a third control end K3 is led out. The above control ends are connected to the control module 10, so that the control module 10 drives any one of the control ends to ground according to the monitoring result. When the control end is grounded, the corresponding branch is turned on, and the indication lamp is lighted up to prompt the specific content of the monitoring result.

[0028] In the embodiment, the control module 10 mainly refers to the single-chip microcomputer U1 with the model STC8G1K08, and the circuit principle diagram thereof is shown in Figure 5 Figures 2 to 4 ​The 20th pin of the single-chip microcomputer is connected with the output end of the monitoring input module to receive the direct current pulse voltage output by the monitoring input module 20; the 1st pin of the single-chip microcomputer is the buzzer alarm pin BEEP_CTRL, which is connected with the input end of the buzzer alarm module to output a high level to the buzzer alarm circuit to drive the buzzer alarm; the 8th pin of the single-chip microcomputer is connected with the output end of the power module 50 to realize the power supply of the single-chip microcomputer, and the 10th pin of the single-chip microcomputer is grounded; the 3rd, 4th and 9th pins of the single-chip microcomputer are respectively connected with the third control end K3, the second control end K2 and the first control end K1 of the light indication module 40, and the indicator light of the corresponding branch is lighted when the 3rd, 4th and 9th pins are connected with the ground end.

[0029] Specifically, the 20th pin of the single-chip microcomputer U1 receives the direct current pulse voltage, triggers the PCA counting when the direct current pulse voltage jumps from high level to low level, and stops counting when the direct current pulse voltage jumps from low level to high level; the capture pulse width time is determined according to the counting value and the time length of each counting; the frequency of the voltage to be monitored is determined according to the capture pulse width time; whether the frequency of the voltage to be monitored is the same as the preset frequency is compared, and the light indication module 40 and / or the buzzer alarm module 30 are driven according to the comparison result. In this embodiment, when the frequency of the voltage to be monitored is the same as the preset frequency, the single-chip microcomputer drives the 9th pin to ground to light the second indicator light; when the frequency of the voltage to be monitored is higher than the preset frequency, the single-chip microcomputer drives the 4th pin to ground to light the third indicator light, and outputs an alarm signal to the buzzer alarm module through the 1st pin to alarm the buzzer; when the frequency of the voltage to be monitored is lower than the preset frequency, the single-chip microcomputer drives the 3rd pin to ground to light the fourth indicator light, and outputs an alarm signal to the buzzer alarm module 30 through the 1st pin to alarm the buzzer. In some embodiments, the preset frequency is 400hz, which can be defined as a 400hz equivalent value in the single-chip microcomputer through macro definition for comparison and reference.

[0030] Figure 6 The circuit principle diagram of the power module 50 is shown, which mainly includes a power supply H4 and a single-pole double-throw switch SW1. The output end (1st pin) of the power supply H4 is connected with the normally open end (1st pin) of the single-pole double-throw switch SW1, the normally closed end (3rd pin) of the single-pole double-throw switch SW1 is idle, the common end (2nd pin) of the single-pole double-throw switch SW1 leads out the output end of the power module 50, and the 2nd pin of the power supply H4 is grounded. In actual use, the common end and the normally open end of the single-pole double-throw switch SW1 are connected to make the power supply H4 output 5V voltage to the remaining modules to realize power supply. In some embodiments, the power supply H4 is a lithium battery.

[0031] In some embodiments, the 11th, 12th, 13th and 14th pins of the single-chip microcomputer U1 can further lead out the plug-in units H1 and H2 to realize external power supply or connection with other devices.

[0032] In actual preparation of the voltage frequency monitoring alarm system of the embodiment, a plastic can be used for shell preparation, the circuit elements are arranged on a double-sided PCB, and the PCB is placed in the shell. When arranging the physical devices, the anti-interference capability of the PCB can be improved by copper cladding, and the single-chip microcomputer can be arranged away from the optocoupler to avoid interference between them.

[0033] The embodiment senses the frequency change of the voltage to be monitored by the current transformer unit, forms a direct current pulse voltage by the optoelectronic coupling unit for the control module to perform frequency monitoring, further combines the buzzer alarm module and the light indication module to realize the sound and light display of the frequency monitoring result, and uses a simple system structure to realize rapid and effective output voltage frequency monitoring, timely reflect the voltage frequency instability, and prevent the downstream equipment failure caused by voltage frequency fluctuation.

[0034] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present disclosure, but not to limit them; although the present disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A voltage frequency monitoring alarm system, characterized by, At least comprising: a control module and a monitoring input module, a buzzer alarm module, a light indication module and a power module connected with the control module, the power module simultaneously supplies power to the monitoring input module, the buzzer alarm module and the light indication module; The monitoring input module at least comprises a current transformer unit, a voltage reduction and amplitude reduction unit and an optoelectronic coupler unit connected in sequence, wherein the current transformer unit is used to generate mutual inductance voltage according to the frequency of the voltage to be monitored, the mutual inductance voltage is input to the input end of the optoelectronic coupler unit after being processed by the voltage reduction and amplitude reduction unit, so that the output end of the optoelectronic coupler unit outputs direct current pulse voltage; The control module monitors the frequency of the voltage according to the direct current pulse voltage, and drives the light indication module and / or the buzzer alarm module to indicate the frequency change of the voltage to be monitored according to the monitoring result.

2. The voltage frequency monitoring alarm system of claim 1, wherein, The monitoring input module at least comprises: a current transformer, a rectifier diode, a transient voltage suppression diode, first to fourth resistors, and an optoelectronic coupler; wherein, One end of the secondary side of the current transformer is connected with one end of the fourth resistor, the negative electrode of the transient voltage suppression diode and the positive electrode of the rectifier diode, the other end of the secondary side is connected with the other end of the fourth resistor, the positive electrode of the transient voltage suppression diode, the other end of the third resistor and the other end of the second resistor, the negative electrode of the rectifier diode is connected with the first pin of the optoelectronic coupler, one end of the third resistor is connected with the second pin of the optoelectronic coupler, the third pin of the optoelectronic coupler is connected with one end of the second resistor and leads out the output end of the monitoring input module, and the fourth pin of the optoelectronic coupler is connected with the first resistor in series and then connected with the output end of the power module.

3. The voltage frequency monitoring alarm system of claim 1, wherein, The buzzer alarm module at least comprises a buzzer and a drive transistor; wherein the power supply end of the buzzer is connected with the output end of the power module, the control end of the buzzer is connected with the drain of the drive transistor, the source of the drive transistor is grounded, and the gate of the drive transistor is connected with the buzzer alarm pin of the control module as the input end of the buzzer alarm module.

4. The voltage frequency monitoring alarm system of claim 3, wherein, The drive transistor is an N-type transistor.

5. The voltage frequency monitoring alarm system of claim 3, wherein, The light indication module at least comprises first to fourth indicator lights and sixth to ninth resistors; wherein all the indicator lights are light emitting diodes, the positive electrodes of all the light emitting diodes are connected with the output end of the power module, the negative electrode of the first indicator light is connected with the sixth resistor in series and then grounded, the second indicator light is connected with the seventh resistor in series and then leads out the first control end, the negative electrode of the third indicator light is connected with the eighth resistor in series and then leads out the second control end, and the negative electrode of the fourth indicator light is connected with the ninth resistor in series and then leads out the third control end.

6. The voltage frequency monitoring alarm system of claim 5, wherein, The control module at least includes a single-chip microcomputer of model STC8G1K08, a 20th pin of the single-chip microcomputer is connected with an output end of the monitoring input module, a 1st pin of the single-chip microcomputer is connected with an input end of the buzzer alarm module, an 8th pin of the single-chip microcomputer is connected with an output end of the power module, 3rd, 4th and 9th pins of the single-chip microcomputer are respectively connected with a third control end, a second control end and a first control end of the light indication module, and a 10th pin of the single-chip microcomputer is grounded.

7. The voltage frequency monitoring alarm system of claim 6, wherein, The single-chip microcomputer is specifically used for receiving the direct current pulse voltage, triggering PCA counting when the direct current pulse voltage jumps from high level to low level, and stopping counting when the direct current pulse voltage jumps from low level to high level. The frequency of the voltage to be monitored is determined according to the capture pulse width time. The frequency of the voltage to be monitored is compared with a preset frequency, and the light indication module and / or the buzzer alarm module are driven according to the comparison result.

8. The voltage frequency monitoring alarm system of claim 7, wherein, The single-chip microcomputer is specifically used for: When the frequency of the voltage to be monitored is the same as the preset frequency, the single-chip microcomputer drives the 9th pin to be grounded, so that the second indication lamp is lighted up. When the frequency of the voltage to be monitored is higher than the preset frequency, the single-chip microcomputer drives the 4th pin to be grounded, so that the third indication lamp is lighted up, and an alarm signal is output to the buzzer alarm module through the 1st pin, so that the buzzer alarms. When the frequency of the voltage to be monitored is lower than the preset frequency, the single-chip microcomputer drives the 3rd pin to be grounded, so that the fourth indication lamp is lighted up, and an alarm signal is output to the buzzer alarm module through the 1st pin, so that the buzzer alarms.

9. The voltage frequency monitoring alarm system according to any one of claims 1 to 8, wherein, The power module at least includes a single-pole double-throw switch and a power supply, wherein an output end of the power supply is connected with a normally open end of the single-pole double-throw switch, a normally closed end of the single-pole double-throw switch is idle, and a common end of the single-pole double-throw switch leads to an output end of the power module.

10. The voltage frequency monitoring alarm system of claim 9, wherein, The power supply is a lithium battery.

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