A multi-output power supply state detection circuit

Abstract

The application discloses a kind of multi-output power supply state detection circuits, comprising: n groups of signal acquisition circuits, n groups of signal control circuits and signal output circuit;Each group of signal acquisition circuit includes m signal acquisition sub-circuit;M signal acquisition sub-circuit is connected after a group of signal control circuit;Each group of signal control circuit is connected after signal output circuit.Switching analog signal A is obtained by signal acquisition sub-circuit for collecting a route output signal P of weapon power supply, and the signal acquisition circuit inside optocoupler is driven to the signal control circuit of later stage;Signal control circuit is used to control the opening / closing of the signal control circuit inside optocoupler under the joint action of control signal D and switching analog signal A;Signal output circuit is used to output analog reporting signal OUT under the joint action of control signal K, control signal S and switching analog signal B.The multi-output power supply state detection circuit described in the application has the characteristics of high reliability, low cost and localization.

Description

Technical Field

[0001] This invention belongs to the field of weapon power supply detection technology, and in particular relates to a multi-output power supply status detection circuit. Background Technology

[0002] As the localization of weapon products progresses, the requirements for power supply testing, which serves as the secondary power source for weapons, are gradually increasing. While ensuring complete localization, it is also necessary to ensure safety, reliability, and low cost.

[0003] Currently, traditional weapon power supplies employ digital detection circuits to collect signals from the power supply outputs for multi-output detection. The collected signals are then converted and sent to the internal core processing chip. The chip identifies the signals and outputs a reporting signal. This detection method typically uses DSPs (e.g., TMS320C series chips) or FPGAs (e.g., A3P3000, MRS090TS, etc.) as the core control chips. However, these chips are not yet domestically produced, and digital chips are susceptible to interference in complex operating environments. Furthermore, domestically produced DSP and FPGA acquisition and processing chips are generally expensive, making them difficult to promote in weapon power supplies that require low cost and domestic production. On the other hand, the chips used in the digital detection circuit and the crystal oscillators in the peripheral circuits place high demands on the layout of the printed circuit board and the application environment. Summary of the Invention

[0004] The technical problem solved by this invention is to overcome the shortcomings of the prior art and provide a multi-output power supply status detection circuit, which is suitable for real-time detection of weapon power supply output status. It has the characteristics of high reliability, low cost and complete localization, and can be extended to products that require real-time status detection of multiple power supply outputs.

[0005] To address the aforementioned technical problems, this invention discloses a multi-output power supply status detection circuit, comprising: n sets of signal acquisition circuits, n sets of signal control circuits, and signal output circuits; wherein, n≥1;

[0006] Each signal acquisition circuit consists of m signal acquisition sub-circuits; the m signal acquisition sub-circuits are connected in series and then connected to a signal control circuit; where m ≥ 1.

[0007] Each group of signal control circuits is connected in series and then connected to the signal output circuit.

[0008] In the above-mentioned multi-output power supply status detection circuit,

[0009] The signal acquisition sub-circuit is used to acquire one output signal P of the weapon power supply, obtain the switching analog signal A of the optocoupler inside the signal acquisition circuit, and drive the subsequent signal control circuit.

[0010] The signal control circuit receives the control signal D and the switch analog signal A; under the combined action of the control signal D and the switch analog signal A, it controls the on / off state of the optocoupler inside the signal control circuit to obtain the switch analog signal B of the optocoupler inside the signal control circuit.

[0011] The signal output circuit is used to receive control signal K, control signal S and switch analog signal B; under the combined action of control signal K, control signal S and switch analog signal B, it outputs analog reporting signal OUT.

[0012] In the above multi-output power supply status detection circuit, each signal acquisition sub-circuit has the same structure, including: voltage divider resistor R1, voltage divider resistor R2, filter capacitor C1 and optocoupler 1V1.

[0013] The voltage divider resistor R2, the filter capacitor C1, and the optocoupler 1V1 are connected in parallel;

[0014] The voltage divider resistor R1 is connected in series with the parallel voltage divider resistor R2, the filter capacitor C1, and the optocoupler 1V1.

[0015] In the above-mentioned multi-output power supply status detection circuit, the signal control circuit includes: voltage divider resistor R13, voltage divider resistor R14, filter capacitor C7 and optocoupler 2V1.

[0016] The voltage divider resistor R14, the filter capacitor C7, and the optocoupler 2V1 are connected in parallel;

[0017] The voltage divider resistor R13 is connected in series with the parallel voltage divider resistor R14, the filter capacitor C7, and the optocoupler 2V1.

[0018] In the above-mentioned multi-output power supply status detection circuit, the signal output circuit includes: voltage divider resistor R17, voltage divider resistor R18, filter capacitor C9, optocoupler 3V1 and pull-up resistor R19.

[0019] The voltage divider resistor R18, the filter capacitor C9, and the optocoupler 3V1 are connected in parallel;

[0020] The voltage divider resistor R17 is connected in series with the parallel voltage divider resistor R18, the filter capacitor C9, and the optocoupler 3V1.

[0021] The optocoupler 3V1 and the pull-up resistor R19 are connected in series.

[0022] The working principle of the multi-output power supply status detection circuit described above is as follows:

[0023] When the output signal of the weapon power supply acquired by the signal acquisition sub-circuit is normal, and the voltage across the voltage divider resistor R2 is greater than the turn-on voltage of the optocoupler 1V1 in the signal acquisition circuit, the optocoupler 1V1 turns on, and the transistor at the output terminal of the optocoupler 1V1 is turned on.

[0024] Due to the presence of control signal D in the signal control circuit, the first voltage value V1 is greater than the turn-on voltage of optocoupler 2V1 in the signal control circuit, and optocoupler 2V1 is turned on.

[0025] Due to the presence of control signal K in the signal output circuit, the second voltage value V2 is greater than the turn-on voltage of optocoupler 3V1 in the signal output circuit, and optocoupler 3V1 is turned on.

[0026] When optocoupler 3V1 is turned on, the control signal S1 flows into the signal detection ground through the pull-up resistor R19 and the secondary transistor of optocoupler 3V1. At this time, the analog reporting signal OUT is the transistor voltage drop of the secondary transistor of optocoupler 3V1, i.e., high level / low level.

[0027] In the above-mentioned multi-output power supply status detection circuit,

[0028] The first voltage value V1 is as follows:

[0029]

[0030] Among them, V D This represents the voltage value of the control signal D, V. 三 R represents the voltage drop across the secondary transistor of the optocoupler in the signal acquisition sub-circuit. 13 This indicates the resistance value of the voltage divider resistor R13, R 14 This indicates the resistance value of the voltage divider resistor R14;

[0031] The second voltage value V2 is as follows:

[0032]

[0033] Among them, V K V′ represents the voltage value of the control signal K. 三 R represents the voltage drop across the secondary transistor of the optocoupler in the signal control circuit. 17 This indicates the resistance value of the voltage divider resistor R17, R 18 This indicates the resistance value of the voltage divider resistor R18.

[0034] In the aforementioned multi-output power supply status detection circuit, when a fault occurs in one of the output voltages of the weapon power supply, the optocoupler path in the corresponding signal acquisition sub-circuit is disconnected, the switch analog signal A and the subsequent control signals D, K, and S cannot be transmitted, the status of the analog reporting signal OUT of the signal output circuit changes, and the fault is reported.

[0035] In the above-mentioned multi-output power supply status detection circuit, the signal output circuit also includes: a voltage divider resistor R20; wherein, the voltage divider resistor R20 and the optocoupler 3V1 are connected in parallel and then connected in series with the pull-up resistor R19.

[0036] After passing through the voltage divider resistor R20, the analog reporting signal OUT changes from outputting a high / low level to outputting a precise voltage value V. OUT : Among them, V S R1 represents the voltage value of the control signal S, R2 represents the resistance value of the voltage divider resistor R1, and R2 represents the resistance value of the voltage divider resistor R2.

[0037] In the aforementioned multi-output power supply status detection circuit, the voltage value of control signal D is not less than the voltage value of control signal K; the voltage value of control signal K is not less than the voltage value of control signal S; control signal D, control signal K, and control signal S are all provided by the weapon power supply.

[0038] The present invention has the following advantages:

[0039] (1) This invention discloses a multi-output power supply status detection circuit. Compared with traditional digital detection circuits, the detection circuit described in this invention is simple to implement, highly reliable, and inexpensive. All the components used are domestically produced and technologically mature. Compared with weapon power supplies that emphasize domestic production, this avoids the risk of embargo on core digital chips. Furthermore, the threshold voltage when the output voltage reports a fault can be changed by adjusting the resistance value of the voltage divider resistor at the acquisition end.

[0040] (2) This invention discloses a multi-output power supply status detection circuit. All selected devices are low-power devices, which reduces circuit loss and improves the overall output efficiency of the product compared to digital acquisition circuits. Moreover, the heat dissipation of the devices does not need to be considered in the design.

[0041] (3) The present invention discloses a multi-output power supply status detection circuit. Compared with the single-ground digital acquisition circuit acquisition method, the power supply output signal detected by the detection circuit of the present invention can be multiple non-common ground signals. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the circuit structure of a multi-output power supply status detection circuit in an embodiment of the present invention;

[0043] Figure 2 This is a circuit schematic diagram of a multi-output power supply status detection circuit according to an embodiment of the present invention;

[0044] Figure 3 This is a schematic diagram of the connection of a voltage divider resistor R20 in an embodiment of the present invention. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments disclosed in the present invention will be described in further detail below with reference to the accompanying drawings.

[0046] To address the need for real-time status monitoring of multiple weapon power outputs, this invention presents a multi-output power supply status detection circuit. This circuit can monitor and report the status of multiple weapon power outputs in real time. Furthermore, all components used are domestically produced conventional components, which effectively achieves the complete localization of weapon power supplies.

[0047] like Figure 1 In this embodiment, the multi-output power supply status detection circuit includes: n sets of signal acquisition circuits, n sets of signal control circuits, and signal output circuits. Each set of signal acquisition circuits includes m signal acquisition sub-circuits; the m signal acquisition sub-circuits are connected in series to a set of signal control circuits; and each set of signal control circuits is connected in series to a signal output circuit. Wherein, n≥1, m≥1; the values ​​of m and n can be determined according to the number of output channels of the weapon power supply.

[0048] In this embodiment, the signal acquisition sub-circuit is used to acquire one output signal P of the weapon power supply, obtaining the switching analog signal A of the optocoupler inside the signal acquisition circuit, which drives the subsequent signal control circuit. The signal control circuit receives the control signal D and the switching analog signal A; under the combined action of the control signal D and the switching analog signal A, it controls the on / off state of the optocoupler inside the signal control circuit, obtaining the switching analog signal B of the optocoupler inside the signal control circuit. The signal output circuit receives the control signal K, the control signal S, and the switching analog signal B; under the combined action of the control signal K, the control signal S, and the switching analog signal B, it outputs the analog reporting signal OUT.

[0049] In this embodiment, as Figure 2 Each signal acquisition sub-circuit has the same structure, including: voltage divider resistor R1, voltage divider resistor R2, filter capacitor C1, and optocoupler 1V1. Among them, voltage divider resistor R2, filter capacitor C1, and optocoupler 1V1 are connected in parallel; voltage divider resistor R1 is connected in series with the parallel voltage divider resistor R2, filter capacitor C1, and optocoupler 1V1.

[0050] In this embodiment, as Figure 2 The signal control circuit may specifically include: voltage divider resistor R13, voltage divider resistor R14, filter capacitor C7, and optocoupler 2V1. Among them, voltage divider resistor R14, filter capacitor C7, and optocoupler 2V1 are connected in parallel; voltage divider resistor R13 is connected in series with the parallel voltage divider resistor R14, filter capacitor C7, and optocoupler 2V1.

[0051] In this embodiment, as Figure 2The signal output circuit may specifically include: voltage divider resistor R17, voltage divider resistor R18, filter capacitor C9, optocoupler 3V1, and pull-up resistor R19. Specifically, voltage divider resistor R18, filter capacitor C9, and optocoupler 3V1 are connected in parallel; voltage divider resistor R17 is connected in series with the parallel voltage divider resistor R18, filter capacitor C9, and optocoupler 3V1; and optocoupler 3V1 and pull-up resistor R19 are connected in series.

[0052] In this embodiment, the working principle of the multi-output power supply status detection circuit is as follows:

[0053] When the output signal of the weapon power supply acquired by the signal acquisition sub-circuit is normal, and the voltage across the voltage divider resistor R2 is greater than the turn-on voltage of the optocoupler 1V1 in the signal acquisition circuit, the optocoupler 1V1 turns on, and the transistor at the output terminal of the optocoupler 1V1 conducts.

[0054] Because of the presence of control signal D in the signal control circuit, the first voltage value V1 is greater than the turn-on voltage of optocoupler 2V1 in the signal control circuit, and optocoupler 2V1 is turned on. Wherein, V D This represents the voltage value of the control signal D, V. 三 R represents the voltage drop across the secondary transistor of the optocoupler in the signal acquisition sub-circuit. 13 This indicates the resistance value of the voltage divider resistor R13, R 14 This indicates the resistance value of the voltage divider resistor R14.

[0055] Because of the presence of control signal K in the signal output circuit, the second voltage value V2 is greater than the turn-on voltage of optocoupler 3V1 in the signal output circuit, and optocoupler 3V1 is turned on. V K V′ represents the voltage value of the control signal K. 三 R represents the voltage drop across the secondary transistor of the optocoupler in the signal control circuit. 17 This indicates the resistance value of the voltage divider resistor R17, R 18 This indicates the resistance value of the voltage divider resistor R18.

[0056] When optocoupler 3V1 is turned on, the control signal S1 flows into the signal detection ground through the pull-up resistor R19 and the secondary transistor of optocoupler 3V1. At this time, the analog reporting signal OUT is the transistor voltage drop of the secondary transistor of optocoupler 3V1. Since the transistor voltage drop value is less than 1, it can be equivalent to the analog reporting signal being low.

[0057] When a fault occurs in one of the output voltages of the weapon power supply, the optocoupler path in the corresponding signal acquisition sub-circuit is disconnected, the analog switch signal A and the subsequent control signals D, K, and S cannot be transmitted, the analog reporting signal OUT of the signal output circuit changes state (is directly pulled to a high level), and the fault is reported.

[0058] In this embodiment, if a more accurate voltage signal needs to be reported, it can be used... Figure 3 The voltage divider reporting signal is shown in the form shown. For example... Figure 3 The signal output circuit may also include: a voltage divider resistor R20; the voltage divider resistor R20 and the optocoupler 3V1 are connected in parallel and then in series with the pull-up resistor R19. After passing through the voltage divider resistor R20, the analog reporting signal OUT changes from an output high / low level to an output precise voltage value V. OUT : Among them, V S R1 represents the voltage value of the control signal S, R2 represents the resistance value of the voltage divider resistor R1, and R2 represents the resistance value of the voltage divider resistor R2.

[0059] In this embodiment, the voltage value of control signal D is not less than the voltage value of control signal K; the voltage value of control signal K is not less than the voltage value of control signal S; control signal D, control signal K and control signal S are all provided by the weapon power supply.

[0060] In this embodiment, during the design process of the multi-output power supply status detection circuit to report detection signals, the current transfer ratio between the input and output terminals of the optocoupler must be controlled within the effective ratio. Therefore, it is necessary to adjust the voltage divider resistor at the input terminal of each stage of the circuit to achieve the current balance flowing through the input and output terminals of the optocoupler to ensure that the optocoupler can be turned on normally.

[0061] In this embodiment, the multi-output power supply status detection circuit scheme can also change the high or low level of the reporting signal by placing it at the output terminal of the transistor in the final core control optocoupler without extensive circuit replacement. This multi-output power supply status detection circuit scheme can also change the accuracy of the detection circuit without replacing it. The circuit contains no high-power components, eliminating the need for heat dissipation design, and uses domestically mature components, making it more suitable for weapon secondary power supply detection systems that require domestic production.

[0062] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solutions of the present invention by utilizing the methods and techniques disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall fall within the protection scope of the technical solutions of the present invention.

[0063] The contents not described in detail in this specification are common knowledge to those skilled in the art.

Claims

1. A multi-output power supply status detection circuit, characterized in that, include: n sets of signal acquisition circuits, n sets of signal control circuits, and n sets of signal output circuits; where n≥1; Each signal acquisition circuit consists of m signal acquisition sub-circuits; the m signal acquisition sub-circuits are connected in series and then connected to a signal control circuit; where m ≥ 1. Each group of signal control circuits is connected in series and then connected to the signal output circuit. The signal acquisition sub-circuit is used to acquire one output signal P of the weapon power supply, obtaining the switching analog signal A of the optocoupler inside the signal acquisition circuit, which drives the subsequent signal control circuit; the signal control circuit is used to receive the control signal D and the switching analog signal A; under the combined action of the control signal D and the switching analog signal A, it controls the on / off state of the optocoupler inside the signal control circuit, obtaining the switching analog signal B of the optocoupler inside the signal control circuit; the signal output circuit is used to receive the control signal K, the control signal S, and the switching analog signal B; under the combined action of the control signal K, the control signal S, and the switching analog signal B, it outputs the analog reporting signal OUT; Each signal acquisition sub-circuit has the same structure, including: voltage divider resistor R1, voltage divider resistor R2, filter capacitor C1, and optocoupler 1V1; wherein, voltage divider resistor R2, filter capacitor C1, and optocoupler 1V1 are connected in parallel; voltage divider resistor R1 is connected in series with the parallel voltage divider resistor R2, filter capacitor C1, and optocoupler 1V1. The signal control circuit includes: voltage divider resistor R13, voltage divider resistor R14, filter capacitor C7, and optocoupler 2V1; wherein, voltage divider resistor R14, filter capacitor C7, and optocoupler 2V1 are connected in parallel; voltage divider resistor R13 is connected in series with the parallel voltage divider resistor R14, filter capacitor C7, and optocoupler 2V1. The signal output circuit includes: voltage divider resistor R17, voltage divider resistor R18, filter capacitor C9, optocoupler 3V1, and pull-up resistor R19; wherein, voltage divider resistor R18, filter capacitor C9, and optocoupler 3V1 are connected in parallel; voltage divider resistor R17 is connected in series with the parallel voltage divider resistor R18, filter capacitor C9, and optocoupler 3V1; and optocoupler 3V1 and pull-up resistor R19 are connected in series.

2. The multi-output power supply status detection circuit according to claim 1, characterized in that, The working principle of the multi-output power supply status detection circuit is as follows: When the output signal of the weapon power supply acquired by the signal acquisition sub-circuit is normal, and the voltage across the voltage divider resistor R2 is greater than the turn-on voltage of the optocoupler 1V1 in the signal acquisition circuit, the optocoupler 1V1 turns on, and the transistor at the output terminal of the optocoupler 1V1 is turned on. Due to the presence of control signal D in the signal control circuit, the first voltage value V1 is greater than the turn-on voltage of optocoupler 2V1 in the signal control circuit, and optocoupler 2V1 is turned on. Due to the presence of control signal K in the signal output circuit, the second voltage value V2 is greater than the turn-on voltage of optocoupler 3V1 in the signal output circuit, and optocoupler 3V1 is turned on. When optocoupler 3V1 is turned on, the control signal S1 flows into the signal detection ground through the pull-up resistor R19 and the secondary transistor of optocoupler 3V1. At this time, the analog reporting signal OUT is the transistor voltage drop of the secondary transistor of optocoupler 3V1, i.e., high level / low level.

3. The multi-output power supply status detection circuit according to claim 2, characterized in that, The first voltage value V1 is as follows: Among them, V D This represents the voltage value of the control signal D, V. 三 R represents the voltage drop across the secondary transistor of the optocoupler in the signal acquisition sub-circuit. 13 This indicates the resistance value of the voltage divider resistor R13, R 14 This indicates the resistance value of the voltage divider resistor R14; The second voltage value V2 is as follows: Among them, V K V′ represents the voltage value of the control signal K. 三 R represents the voltage drop across the secondary transistor of the optocoupler in the signal control circuit. 17 This indicates the resistance value of the voltage divider resistor R17, R 18 This indicates the resistance value of the voltage divider resistor R18.

4. The multi-output power supply status detection circuit according to claim 2, characterized in that, When a fault occurs in one of the output voltage paths of the weapon power supply, the optocoupler path in the corresponding signal acquisition sub-circuit is disconnected, the analog switch signal A and the subsequent control signals D, K, and S cannot be transmitted, the analog reporting signal OUT of the signal output circuit changes state, and the fault is reported.

5. The multi-output power supply status detection circuit according to claim 2, characterized in that, The signal output circuit also includes: a voltage divider resistor R20; wherein, the voltage divider resistor R20 and the optocoupler 3V1 are connected in parallel and then connected in series with the pull-up resistor R19; After passing through the voltage divider resistor R20, the analog reporting signal OUT changes from outputting a high / low level to outputting a precise voltage value V. OUT : Among them, V S R1 represents the voltage value of the control signal S, R2 represents the resistance value of the voltage divider resistor R1, and R2 represents the resistance value of the voltage divider resistor R2.

6. The multi-output power supply status detection circuit according to claim 1, characterized in that, The voltage value of control signal D is not less than the voltage value of control signal K; the voltage value of control signal K is not less than the voltage value of control signal S; control signals D, K, and S are all provided by the weapon power supply.

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