CN211959182U - Embedding box marking machine power protection monitoring circuit - Google Patents
Embedding box marking machine power protection monitoring circuit Download PDFInfo
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- CN211959182U CN211959182U CN202020888362.XU CN202020888362U CN211959182U CN 211959182 U CN211959182 U CN 211959182U CN 202020888362 U CN202020888362 U CN 202020888362U CN 211959182 U CN211959182 U CN 211959182U
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Abstract
The utility model relates to a power protection monitoring circuit of an embedding box marking machine, which relates to the technical field of power protection and comprises a trigger switch device, a master control switch and a maintaining device; the main control switch is electrically connected to a power supply loop of the marking machine and is positioned between the power supply anode of the marking machine and the load of the marking machine; the trigger switch device is electrically connected to a power supply loop of the marking machine, is positioned between the main control switch and a load of the marking machine, and is electrically connected to the main control switch; when a power supply loop of the marking machine is short-circuited, the trigger switch device receives a voltage signal which is less than or equal to a set threshold value and responds to the voltage signal to output a trigger signal, and the main control switch receives and responds to the trigger signal to disconnect the power supply loop of the marking machine; and the maintaining device is electrically connected with the main control switch and the trigger switch device. The utility model discloses have and carry out the effect protected its power when the short circuit phenomenon takes place for the marking machine.
Description
Technical Field
The utility model belongs to the technical field of the technique of power protection and specifically relates to an embedding box marking machine power protection monitoring circuit is related to.
Background
Currently, an embedding cassette is a container for storing pathological specimens. In order to identify the embedding box, characters such as two-dimensional codes, pathological numbers, patient identity information and the like need to be marked on the embedding box, and a marking machine is a machine for automatically marking on the embedding box.
The above prior art solutions have the following drawbacks: after the embedding box marking machine is used for a long time, short circuit phenomenon can be generated due to reasons such as line aging, and the like, so that a power module in the embedding box marking machine is damaged due to overlarge current.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, one of the purposes of the utility model is to provide an embedding box marking machine power protection monitoring circuit can protect its power when the short circuit phenomenon takes place for the marking machine.
The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme: a power supply protection monitoring circuit of an embedding box marking machine comprises a trigger switch device, a main control switch and a maintaining device;
the main control switch is electrically connected to the power supply loop of the marking machine, is positioned between the power supply anode of the marking machine and the load of the marking machine, and is used for switching on or switching off the power supply loop of the marking machine;
the trigger switch device is electrically connected to a power supply loop of the marking machine, is positioned between the main control switch and a load of the marking machine, is used for receiving and responding to a voltage signal of any node between the main control switch and the load of the marking machine and outputting a trigger signal when the voltage signal is less than or equal to a set threshold value, and is electrically connected to the main control switch and used for controlling the main control switch to be switched on or switched off;
when a power supply loop of the marking machine is short-circuited, the trigger switch device receives a voltage signal which is less than or equal to a set threshold value and responds to the voltage signal to output a trigger signal, and the main control switch receives and responds to the trigger signal to disconnect the power supply loop of the marking machine;
and the maintaining device is electrically connected with the main control switch and the trigger switch device and is used for outputting a maintaining signal to control the main control switch to conduct a power supply loop of the marking machine when the trigger signal is interrupted.
By adopting the technical scheme, when the power supply of the marking machine is short-circuited due to the load fault of the marking machine, the voltage signal of any node between the main control switch and the load of the marking machine can be suddenly reduced until the voltage signal is reduced to or below a set threshold value, the trigger switch device is triggered to output a trigger signal, and the main control switch responds to the trigger signal to disconnect the power supply loop of the marking machine, so that the power supply loop of the power supply and the load is quickly cut off, the power supply is protected, and the power supply is protected when the marking machine is short-circuited; when the marking machine is started, the trigger signal is interrupted to trigger the maintaining device, at the moment, the main control switch is conducted on a power supply loop of the marking machine due to the interruption of the trigger signal, and meanwhile, the maintaining device controls the main control switch to maintain the conduction of the power supply loop of the marking machine.
The present invention may be further configured in a preferred embodiment as: the main control switch comprises a mos tube, a grid electrode of the mos tube is electrically connected to the trigger switch device to receive a trigger signal, and a source electrode and a drain electrode of the mos tube are connected in series in a power supply loop of the marking machine.
By adopting the technical scheme, the mos tube has the characteristic of switching on or off states along with the change of the grid input voltage, the response trigger signal is used for controlling the on-off of the power supply loop of the marking machine, the mos tube has a high voltage withstanding value, the mos tube is suitable for the power supply loop of a power supply and a load, the stability of power supply output is improved, and the service life of the mos tube is prolonged.
The present invention may be further configured in a preferred embodiment as: the trigger switch device comprises a triode and a high-resistance resistor, wherein the base electrode of the triode is electrically connected to any node between the main control switch and the load of the marking machine, the emitter electrode and the collector electrode of the triode are connected between the grid electrode of the mos tube and the ground in series, one end of the high-resistance resistor is connected to the positive electrode of the power supply, and the other end of the high-resistance resistor is connected to the grid electrode of the mos tube.
By adopting the technical scheme, the base electrode of the triode is used for receiving the voltage signal of any node between the main control switch and the load of the number printer, when the voltage signal is reduced to a set threshold value or below the set threshold value, the trigger switch device outputs the trigger signal, namely the triode is cut off, so that the grid electrode of the mos tube is connected with the anode of the power supply through the high resistance, the low level signal input by the grid electrode of the mos tube is converted into the high level signal, and the mos tube is cut off, so that the power supply loop of the number printer is cut off, and the effect of protecting the power supply is achieved.
The present invention may be further configured in a preferred embodiment as: the transistor comprises a triode, a plurality of mos tubes, a plurality of collectors and emitters, wherein the collectors and the emitters of the mos tubes are mutually connected, and the grid of each mos tube is electrically connected with the collector of the triode.
By adopting the technical scheme, when any mos tube is damaged, the rest mos tubes can play a role in connection and disconnection, so that the stability of power supply protection is ensured; because the mos tubes are connected in parallel, the current impact on a single mos tube during short circuit is reduced, the mos tube is protected, and the service life of the mos tube is prolonged.
The present invention may be further configured in a preferred embodiment as: the trigger switch device also comprises a main control chip which is electrically connected with the base electrode of the triode, and when the marking machine is started, the main control chip outputs a pulse signal to the base electrode of the triode so as to interrupt the trigger signal.
By adopting the technical scheme, when the marking machine needs to be started, only the pin of the main control chip needs to be controlled to output a pulse signal, the base electrode of the triode is conducted when receiving the pulse signal, the gate electrode of the mos tube is conducted due to grounding, namely, the trigger signal is interrupted, and therefore the marking machine is started; and after the main control switch is conducted with a power supply loop of a power supply of the marking machine, the maintaining device triggers, the base electrode of the triode receives a voltage signal of any node between the main control switch and a load of the marking machine, and the voltage signal is switched from a low level to a high level at the moment so that the triode is maintained in a state of interrupting the trigger signal, thereby playing a self-locking role, reducing the interference of external factors and reducing the power consumption generated by the main control chip continuously outputting the voltage signal.
The present invention may be further configured in a preferred embodiment as: the base electrode of the triode is connected with the ground resistor, and the maintaining device comprises a divider resistor which is connected in series between the base electrode of the triode and a node of the base electrode which is connected between the main control switch and the load of the marking machine.
By adopting the technical scheme, the high-level signal output after the power supply loop of the power supply is conducted through the divider resistor is divided and then input to the base electrode of the triode, so that the conduction of the triode is maintained, and the conduction of the power supply loop of the power supply is further maintained; because the working voltage output by the power supply of the marking machine is generally higher than the withstand voltage value of the triode, the input voltage of the base electrode of the triode is reduced through the voltage division effect of the divider resistor and the grounding resistor, so that the triode is protected, and the service life of the triode is prolonged.
The present invention may be further configured in a preferred embodiment as: the set threshold of the triode output trigger signal is as follows: u1 ≤ R2 ^ U0/(R1 + R2), U0 is the node voltage that the base of triode connects between main control switch and the load of marking machine, R2 is the resistance value of ground resistance, R1 is the resistance value of divider resistance.
By adopting the technical scheme, the set threshold range of the triode is calculated by a formula U1 ≤ R2 × U0/(R1 + R2), so that the triggering condition of the triode is conveniently debugged, and the stability of power protection triggering is improved; and the withstand voltage value of the triode is low, and the triode is prevented from being damaged due to overlarge voltage input by the base electrode of the triode through the voltage division effect of the grounding resistor and the voltage division resistor.
The present invention may be further configured in a preferred embodiment as: and the base electrode of the triode is connected between a node between the main control switch and the load of the marking machine and the ground, and an indicator lamp is connected in series.
By adopting the technical scheme, when the main control switch is switched on, the power supply loop of the marking machine load is switched on, the base of the triode is connected with the node voltage between the main control switch and the marking machine load to be increased, so that the indicator lamp emits light due to power on, when the marking machine load is in short circuit, the base of the triode is connected with the node voltage between the main control switch and the marking machine load to be lowered, so that the indicator lamp is extinguished due to power off, and the working state of the marking machine is displayed through the indicator lamp.
To sum up, the utility model discloses a following at least one useful technological effect:
when the load fault of the marking machine causes the power supply to be short-circuited, the voltage signal of any node between the main control switch and the load of the marking machine can be suddenly reduced, the trigger switch device is triggered to output a trigger signal when the voltage signal is reduced to a set threshold value or below the set threshold value, and the main control switch responds to the trigger signal to disconnect the power supply loop of the marking machine so as to quickly cut off the power supply loop of the power supply and the load and protect the power supply of the marking machine when the marking machine is short-circuited;
when any mos tube is damaged, the other mos tubes can perform the functions of connection and disconnection, so that the stability of power supply protection is ensured; because the mos tubes are connected in parallel, the current impact on a single mos tube during short circuit is reduced, the mos tube is protected, and the service life of the mos tube is prolonged;
because the working voltage output by the power supply of the marking machine is generally higher than the withstand voltage value of the triode, the input voltage of the base electrode of the triode is reduced through the voltage division effect of the divider resistor and the grounding resistor, so that the triode is protected, and the service life of the triode is prolonged.
Drawings
FIG. 1 is a schematic circuit diagram of the present embodiment;
fig. 2 is a schematic block diagram of the present embodiment.
Reference numerals: 1. a trigger switch device; 2. a master switch; 3. and a maintaining device.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
In this embodiment, the power of marking machine adopts DC power supply, refers to fig. 1, fig. 2, does the utility model discloses an embedding box marking machine power protection monitoring circuit for play the effect of protection marking machine power, including trigger switch device 1, master switch 2 and pilot lamp. The trigger switch device 1 is electrically connected to the main control switch 2 and the power supply loop of the marking machine, is located between the main control switch 2 and the load of the marking machine, and is used for receiving and responding to a voltage signal of any node between the main control switch 2 and the load of the marking machine. When the load of the marking machine is short-circuited, the voltage signal is less than or equal to a set threshold value, so that the trigger switch device 1 outputs a trigger signal. The main control switch 2 is used for responding to the trigger signal to cut off a power supply loop of the marking machine, so that power supply protection is realized.
The main switch 2 includes two P-channel enhancement type mos transistors corresponding to Q17 and Q18 in fig. 1, respectively, the sources of the two P-channel enhancement type mos transistors are connected to each other, the drains of the two P-channel enhancement type mos transistors are connected to each other, and the gates of the two P-channel enhancement type mos transistors are connected to each other. The sources of the P-channel enhancement type mos transistors Q17 and Q18 are electrically connected to the positive pole of the power supply, and the drains thereof are connected to the load of the marking machine. The mos tube has a high withstand voltage value, so that the mos tube is suitable for a power supply loop of a power supply and a load, the stability of power supply output is improved, and the service life of the mos tube is prolonged.
And because there are two P channel enhancement mode mos pipes, when any one of Q17 and Q18 is damaged, the rest mos pipes can play the effect of switching on and off, thereby ensuring the stability of power protection. And because the mos tubes are mutually connected in parallel, the current impact on a single mos tube during short circuit is reduced, the mos tube is protected, and the service life of the mos tube is prolonged.
The indicator light adopts the light emitting diode, the cathode of the light emitting diode is grounded, the anode of the light emitting diode is connected between the marking machine load and the common drain electrode of the P-channel enhanced mos tube Q17 and Q18, when the main control switch 2 is conducted, the power supply loop of the marking machine load is conducted, and at the moment, the voltage of a node between the main control switch 2 and the marking machine load is increased, so that the indicator light emits light due to power. And when the load of the marking machine is short-circuited, the voltage of a node between the main control switch 2 and the load of the marking machine is reduced, so that the indicating lamp is turned off due to power failure, and the working state of the marking machine is displayed through the indicating lamp.
The trigger switch device 1 comprises a high-resistance R3 and a capacitor C1, wherein one end of the high-resistance R3 is electrically connected to the positive electrode of a power supply, the other end of the high-resistance R3 is electrically connected to the gates of two P-channel enhancement type mos transistors Q17 and Q18, and the capacitor C1 is connected in parallel to two ends of the high-resistance R3. The P-channel enhanced mos tube has the characteristics of low-level conduction and high-level cutoff, so that the P-channel enhanced mos tube is kept to be cut off through a high-level signal of the anode of the power supply, the power supply of the marking machine is disconnected with a power supply loop of a load of the marking machine, and the power supply protection effect is realized.
The trigger switch device 1 further comprises a main control chip and a triode Q19, the gates of the two P-channel enhancement type mos transistors Q17 and Q18 are electrically connected to the collector of the triode Q19, the triode Q19 is an NPN type triode, the emitter of the triode Q19 is grounded, and the base of the triode Q19 is electrically connected to any node between the main control switch 2 and the load of the marking machine to receive a node voltage signal of the node. When the load of the marking machine is in short circuit, the node voltage signal of the node is pulled low until the voltage value is smaller than or equal to the set threshold value, the triode Q19 is cut off, at the moment, the grid electrodes of the two P-channel enhancement type mos tubes are connected with the positive electrode of the power supply through the high resistor R3, at the moment, the two P-channel enhancement type mos tubes Q17 and Q18 are both cut off, and the power supply of the marking machine is disconnected with the load, so that the effect of protecting the power supply is achieved.
The main control chip adopts a 51-chip microcomputer, is electrically connected to the base of the triode Q19, and is used for inputting pulse signals to the base of the triode Q19. When the marking machine needs to be started, an operator only needs to control a pin of the main control chip to output a high-level pulse signal sw, and the base of the triode Q19 is conducted when receiving the pulse signal sw, so that the grids of the P-channel enhanced mos tubes Q17 and Q18 are grounded, the grid input voltages of the P-channel enhanced mos tubes Q17 and Q18 are reduced, the P-channel enhanced mos tubes Q17 and Q18 are conducted, a power supply loop of a power supply of the marking machine is conducted, and the marking machine is started.
The maintaining device 3 is used for outputting a maintaining signal to control the main control switch 2 to conduct a power supply loop of the marking machine when the trigger signal is interrupted, and comprises a voltage division resistor R1 which is connected between the base electrode of the triode Q19 and a node between the main control switch 2 and a load of the marking machine in series, wherein the voltage division resistor R1 enables a high level signal output after the power supply loop of the power supply is conducted, namely the maintaining signal is input to the base electrode of the triode Q19 after voltage division, so that the conduction of the triode Q19 is maintained, the conduction of the power supply loop of the power supply is further maintained, and the self-locking effect is realized. Because the working voltage output by the power supply of the marking machine is generally higher than the withstand voltage value of the triode, a grounding resistor R2 is connected between the base electrode of the triode Q19 and the ground, and the input voltage of the base electrode of the triode Q19 is reduced through the voltage division effect of the voltage division resistor R1 and the grounding resistor R2, so that the triode Q19 is protected, the service life of the triode Q19 is prolonged, the configuration number of the power supply is reduced, and the cost is reduced.
Current in divider resistor R1 and ground resistor R2: i = U0/(R1 + R2); thus, the set threshold of the triode output trigger signal is obtained: u1 ≤ R2 × U0/(R1 + R2), U0 (base of triode) is connected to node voltage between main control switch 2 and the load of marking machine, R2 (resistance of ground resistor R2), and R1 (resistance of divider resistor R1). The set threshold range of the triode Q19 is calculated through a formula, so that the triggering condition of the triode Q19 can be conveniently debugged in a mode of configuring a divider resistor R1 and a grounding resistor R2, and the stability of power protection triggering is improved. And the withstand voltage value of the triode is low, and the triode Q19 is prevented from being damaged due to overlarge voltage input by the base electrode of the triode by the voltage division effect of the grounding resistor R2 and the voltage division resistor R1.
The implementation principle of the embodiment is as follows: when the marking machine is started, an operator only needs to control the main control chip to output a high-level pulse signal, so that the triode is conducted, the gate of the mos tube is conducted due to grounding, namely, the trigger signal is interrupted, and a power supply loop of a marking machine load is conducted. The divider resistor divides the voltage of the high level signal output by the power supply loop of the power supply and then inputs the divided voltage to the base of the triode, so as to maintain the conduction of the triode, further maintain the conduction of the power supply loop of the power supply and realize the self-locking effect.
When the power supply of the marking machine is short-circuited due to the load fault of the marking machine, the voltage signal of any node between the main control switch 2 and the load of the marking machine suddenly drops, when the voltage signal drops to be less than or equal to a set threshold value, the triode Q19 is cut off, the grids of the P-channel enhanced mos tubes Q17 and Q18 are connected to the positive electrode of the power supply through a high-resistance, so that a high-level signal is input, at the moment, the two P-channel enhanced mos tubes Q17 and Q18 are both cut off, and the power supply of the marking machine is disconnected with the load of the marking machine, so that the power supply of the marking machine is protected when the short-circuit phenomenon occurs. And because the triode directly gathers the voltage signal in order to control master switch 2 from the power supply circuit, has shortened the time delay, has reduced the impact that the power received during the time delay to the power protection effect has been promoted.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (8)
1. A power supply protection monitoring circuit of an embedding box marking machine is characterized by comprising a trigger switch device (1), a main control switch (2) and a maintaining device (3);
the main control switch (2) is electrically connected to the power supply loop of the marking machine, is positioned between the power supply anode of the marking machine and the load of the marking machine, and is used for switching on or switching off the power supply loop of the marking machine;
the trigger switch device (1) is electrically connected to a power supply loop of the marking machine, is positioned between the main control switch (2) and a load of the marking machine, is used for receiving and responding to a voltage signal of any node between the main control switch (2) and the load of the marking machine and outputting a trigger signal when the voltage signal is less than or equal to a set threshold value, and is electrically connected to the main control switch (2) and used for controlling the main control switch (2) to be switched on or switched off;
when a power supply loop of the marking machine is short-circuited, the trigger switch device (1) receives a voltage signal smaller than or equal to a set threshold value and responds to the voltage signal to output a trigger signal, and the main control switch (2) receives and responds to the trigger signal to disconnect the power supply loop of the marking machine;
and the maintaining device (3) is electrically connected with the main control switch (2) and the trigger switch device (1) and is used for outputting a maintaining signal to control the main control switch (2) to conduct a power supply loop of the marking machine when the trigger signal is interrupted.
2. The power protection monitoring circuit of an embedding box marking machine according to claim 1, characterized in that the main control switch (2) comprises a mos tube, the grid of the mos tube is electrically connected to the trigger switch device (1) to receive the trigger signal, and the source and the drain are connected in series in the power supply loop of the marking machine.
3. The power protection monitoring circuit of an embedding box marking machine as claimed in claim 2, wherein there are a plurality of mos tubes, the collectors of the mos tubes are connected with each other and the emitters are connected with each other, and the gate of each mos tube is electrically connected to the collector of the triode.
4. The power protection monitoring circuit of the embedding box numbering machine according to claim 2, characterized in that the trigger switch device (1) comprises a triode and a high resistance, wherein the base of the triode is electrically connected to any node between the main control switch (2) and the load of the numbering machine, the emitter and the collector of the triode are connected in series between the grid of the mos tube and the ground, one end of the high resistance is connected to the positive electrode of the power supply, and the other end of the high resistance is connected to the grid of the mos tube.
5. The power protection monitoring circuit of embedding box marking machine according to claim 4, characterized in that the trigger switch device (1) further comprises a main control chip, the main control chip is electrically connected to the base of the triode, and when the marking machine is started, the main control chip outputs a pulse signal to the base of the triode so as to interrupt the trigger signal.
6. The power protection monitoring circuit of embedding box marking machine according to claim 5, characterized in that, a grounding resistor is connected between the base of the triode and the ground, and the maintaining device (3) comprises a voltage dividing resistor connected in series between the base of the triode and a node connected between the main control switch (2) and the marking machine load.
7. The power protection monitoring circuit of the embedding box marking machine according to claim 6, wherein the triode outputs a set threshold of a trigger signal: u1 ≤ R2 ^ U0/(R1 + R2), U0 that is the node voltage that the base of triode connects between master switch (2) and the load of marking machine, R2 is the resistance of ground resistance, R1 is the resistance of divider resistance.
8. The power protection monitoring circuit of the embedding box marking machine according to claim 4, characterized in that an indicator light is connected in series between a node of the base electrode of the triode connected between the main control switch (2) and the load of the marking machine and the ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020888362.XU CN211959182U (en) | 2020-05-23 | 2020-05-23 | Embedding box marking machine power protection monitoring circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020888362.XU CN211959182U (en) | 2020-05-23 | 2020-05-23 | Embedding box marking machine power protection monitoring circuit |
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| Publication Number | Publication Date |
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| CN211959182U true CN211959182U (en) | 2020-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020888362.XU Active CN211959182U (en) | 2020-05-23 | 2020-05-23 | Embedding box marking machine power protection monitoring circuit |
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| CN (1) | CN211959182U (en) |
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- 2020-05-23 CN CN202020888362.XU patent/CN211959182U/en active Active
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