Power failure storage circuit for controller

Abstract

The utility model provides a power-down saving circuit for a controller, which comprises a first voltage stabilizing module of which the input end is connected with a power supply through a first line, the output end is connected with a second line, and the grounding end is connected with a third line; the input end of the second voltage stabilizing module is connected with a fourth circuit, the fourth circuit is connected with the second circuit, the output end of the second voltage stabilizing module is connected with a fifth circuit, the fifth circuit is connected with the power supply end of the controller, the grounding end of the second voltage stabilizing module is connected with a sixth circuit, and the sixth circuit is grounded; the capacitor E3 is arranged between the second line and the third line; and the capacitor E4 is arranged between the fifth line and the sixth line.

Description

Technical Field

[0001] The utility model relates to the field of power-off protection of controllers, in particular to a power-off preservation circuit for controllers. Background Art

[0002] At present, in the field of machine vision, machine vision light sources generally adjust application parameters based on light source controllers. The power-off saving function of most light source controllers on the market is mainly implemented by executing in the case of power failure or continuously saving application parameters when the light source controller is powered on; in a power-shaking environment (including: static interference, group pulse interference and other interference environments), the light source controller will reset and the application parameters will be restored to the state before power on. Utility Model Content

[0003] The main purpose of the utility model is to provide a power-off saving circuit for a controller, which can supply power to the controller to save data when power is lost or fluctuates.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is: a power-off saving circuit for a controller, comprising:

[0005] A first voltage stabilizing module, wherein an input end thereof is connected to a power supply via a first line, an output end thereof is connected to a second line, and a ground end thereof is connected to a third line;

[0006] A second voltage stabilizing module, an input end of which is connected to a fourth circuit, the fourth circuit is connected to the second circuit, an output end of which is connected to a fifth circuit, the fifth circuit is connected to a power supply end of the controller, and a ground end of which is connected to a sixth circuit, the sixth circuit is grounded;

[0007] Capacitor E3, arranged between the second circuit and the third circuit;

[0008] Capacitor E4 is arranged between the fifth line and the sixth line.

[0009] Preferably, a capacitor E2 and a capacitor C21 are connected in parallel between the first line and the third line.

[0010] Preferably, a capacitor C14 is arranged in parallel between the second line and the third line, and the capacitor C14 is arranged in parallel with the capacitor E3.

[0011] Preferably, a capacitor C11 and a capacitor C23 are connected in parallel between the fourth line and the sixth line.

[0012] Preferably, a capacitor C18 is provided between the fifth line and the sixth line, and the capacitor C18 is provided in parallel with the capacitor E4.

[0013] Preferably, a seventh circuit is also connected to the first circuit, the other end of the seventh circuit is grounded, a resistor R6 and a resistor R10 are connected in series on the seventh circuit, a portion of the seventh circuit located between the resistor R6 and the resistor R10 is connected to an eighth circuit, and the eighth circuit is connected to the controller, and the controller can obtain the voltage value on the eighth circuit and determine whether the power supply is in a power outage or power shake according to the voltage value.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] When the power fails or fluctuates, the controller is powered by the capacitor, and the controller can save data in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a circuit diagram of a power-off saving circuit of the utility model;

[0017] Figure 2 This is the wiring diagram of the controller. DETAILED DESCRIPTION

[0018] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0019] like Figure 1 and Figure 2 As shown, a power-off preservation circuit for a controller includes a first voltage stabilizing module 1 and a second voltage stabilizing module 2, wherein the first voltage stabilizing module 1 is LM7812, the second voltage stabilizing module 2 is LM7805, the input end of the first voltage stabilizing module 1 is connected to a 24V power supply through a first line 3, the output end of the first voltage stabilizing module 1 is connected to a second line 4, the ground end of the first voltage stabilizing module 1 is connected to a third line 5, and the third line 5 is grounded. A capacitor E2 and a capacitor C21 are provided between the first line 3 and the third line 5, the two ends of the capacitor E2 are connected to the first line 3 and the third line respectively, the capacitor E2 is an adjustable capacitor, and the two ends of the capacitor C21 are connected to the first line 3 and the third line 5 respectively.

[0020] A capacitor C14 and a capacitor E3 are connected in parallel between the second line 4 and the third line 5 . Both ends of the capacitor C14 are connected to the second line 4 and the third line 5 , respectively. Both ends of the capacitor E3 are connected to the second line 4 and the third line 5 , respectively.

[0021] The first voltage stabilizing module 1 is used to convert a 24V voltage into a 12V voltage. The voltage on the first line 3 is 24V, and the voltage on the second line 4 is 12V.

[0022] The input end of the second voltage stabilizing module 2 is connected to a fourth line 6, which is connected to the second line 4. The second voltage stabilizing module 2 is used to convert a 12V voltage into a 5V voltage. The output end of the second voltage stabilizing module 2 is connected to a fifth line 7, which is connected to the power supply end of the controller and is used to power the controller. The ground end of the second voltage stabilizing module 2 is connected to a sixth line 8, which is grounded. In practice, the third line 5 is connected to the sixth line 8 or the two lines are actually the same line.

[0023] A capacitor C11 and a capacitor C25 are connected in parallel between the fourth line 6 and the sixth line 8 , and a capacitor C18 and a capacitor E4 are connected in parallel between the fifth circuit 7 and the sixth line 8 .

[0024] The capacitor C21, the capacitor C14, the capacitor C11, the capacitor C25 and the capacitor C18 are used for filtering.

[0025] The first line 3 is also connected to a seventh line 9, and the other end of the seventh line 9 is grounded. The seventh line 9 is connected in series with a resistor R6 and a resistor R10, and the portion of the seventh line 9 between the resistor R6 and the resistor R10 is connected to an eighth line 10, and the eighth line 10 is connected to a controller, and the controller can obtain the voltage value on the eighth line 10 and determine whether the power supply is in a power failure or power fluctuation according to the voltage value. The resistance of the resistor R6 and the resistor R10 is adjustable, and a sliding line resistor can be used, or a resistor can be directly replaced manually.

[0026] When the power is normally on, the capacitors E3 and E4 are quickly charged, and the voltage on the eighth line 10 exceeds the predetermined value. When there is a power failure or power fluctuation, the voltage on the eighth line 10 will be lower than the predetermined value. When the controller detects that the voltage on the eighth line 10 is lower than the predetermined value, it enters the saving mode to save the data. At this time, the capacitors E3 and E4 begin to discharge, providing the voltage required by the controller to save the data.

[0027] Preferably, the sensitivity of power-off storage can be adjusted by changing the size of the capacitor E2, the resistor R6 and the resistor R10. The smaller the capacitance and resistance parameters are, the higher the sensitivity of power-off storage is, and the larger the capacitance and resistance are, the lower the sensitivity of power-off storage is.

[0028] The capacitors E2, E3, and E4 are electrolytic capacitors, which have a larger capacity than conventional capacitors and can store more capacity.

[0029] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the specification only describe the principles of the utility model. The utility model may be subject to various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A power-off saving circuit for a controller, characterized in that: include: A first voltage stabilizing module, wherein an input end thereof is connected to a power supply via a first line, an output end thereof is connected to a second line, and a ground end thereof is connected to a third line; A second voltage stabilizing module, an input end of which is connected to a fourth circuit, the fourth circuit is connected to the second circuit, an output end of which is connected to a fifth circuit, the fifth circuit is connected to a power supply end of the controller, and a ground end of which is connected to a sixth circuit, the sixth circuit is grounded; Capacitor E3, arranged between the second circuit and the third circuit; Capacitor E4 is arranged between the fifth line and the sixth line.

2. A power-off saving circuit for a controller according to claim 1, characterized in that: A capacitor E2 and a capacitor C21 are connected in parallel between the first line and the third line.

3. A power-off saving circuit for a controller according to claim 1, characterized in that: A capacitor C14 is connected in parallel between the second line and the third line, and the capacitor C14 is connected in parallel with the capacitor E3.

4. A power-off saving circuit for a controller according to claim 1, characterized in that: A capacitor C11 and a capacitor C23 are connected in parallel between the fourth line and the sixth line.

5. A power-off saving circuit for a controller according to claim 1, characterized in that: A capacitor C18 is provided between the fifth line and the sixth line, and the capacitor C18 is provided in parallel with the capacitor E4.

6. A power-off saving circuit for a controller according to any one of claims 1 to 5, characterized in that: A seventh circuit is also connected to the first circuit, the other end of the seventh circuit is grounded, a resistor R6 and a resistor R10 are connected in series on the seventh circuit, a portion of the seventh circuit located between the resistor R6 and the resistor R10 is connected to an eighth circuit, and the eighth circuit is connected to a controller. The controller can obtain a voltage value on the eighth circuit and determine whether the power supply is in a power outage or power fluctuation according to the voltage value.

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