A discrete quantity acquisition circuit

Abstract

The application discloses a discrete quantity acquisition circuit, comprising: a control module, the control module comprising a first input end, a second input end and a control output end; a first input module, the output end of the first input module being connected to the first input end, the input end of the first input module being used for inputting a signal; a second input module, the output end of the second input module being connected to the second input end, the input end of the second input module also being used for inputting a signal, the input end of the first input module being connected to the input end of the second input module; when the input signal is a first high voltage, the control output end outputs a second high voltage; when the input signal is a first ground voltage, the control output end outputs a second ground voltage; when the input signal is a first open voltage, the control output end outputs a second open voltage. The discrete quantity acquisition circuit is relatively simple in operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of signal conversion, and in particular to a discrete quantity acquisition circuit. BACKGROUND

[0002] In the process of signal transmission between boards, in order to prevent the front-end signal voltage from being too large to burn the back-end circuit or too small to transmit the signal to the back-end circuit, a signal conversion module, generally a discrete quantity acquisition circuit, needs to be set between the front-end circuit and the back-end circuit. Figure 2 As shown in the prior art, the input end of the discrete quantity acquisition circuit includes two input modules, and the two input modules are relatively isolated and are respectively used for inputting a high voltage or a disconnected signal and a ground voltage or a disconnected signal, so as to transmit the signal to the back-end circuit through the control module in the discrete quantity acquisition circuit. In this way, when a signal with different voltage values needs to be input, corresponding operations are also needed to switch the signal input position, and such a mode is relatively cumbersome in operation. SUMMARY

[0003] In view of the above defects or deficiencies in the prior art, it is desirable to provide a discrete quantity acquisition circuit which is simple to operate.

[0004] The specific technical solutions are as follows:

[0005] The present application provides a discrete quantity acquisition circuit, comprising:

[0006] a control module, the control module comprising a first input end, a second input end and a control output end;

[0007] a first input module, the output end of the first input module being connected to the first input end;

[0008] a second input module, the output end of the second input module being connected to the second input end, and the input end of the first input module being connected to the input end of the second input module, the connection being used for inputting an input signal;

[0009] when the input signal is a first high voltage, the control output end outputs a second high voltage;

[0010] when the input signal is a first ground voltage, the control output end outputs a second ground voltage;

[0011] when the input signal is a first disconnected voltage, the control output end outputs a second disconnected voltage.

[0012] Optionally, the control output end comprises a first output end and a second output end, and the discrete quantity acquisition circuit further comprises:

[0013] a first output module, an input end of the first output module being connected to the first output end;

[0014] a second output module, an input end of the second output module being connected to the second output end, an output end of the first output module being connected to an output end of the second output module, and the connection being used for leading out an output signal.

[0015] Optionally, the control module is a relay, and the first input end comprises a first anode and a first cathode connected in series.

[0016] The second input end comprises a second anode and a second cathode connected in series.

[0017] The first output end comprises a first end and a second end.

[0018] The second output end comprises a third end and a fourth end.

[0019] The first input end is connected to the first output end, and the second input end is connected to the second output end.

[0020] When the input signal is a first high voltage, the first end is connected to the second end, and the third end is disconnected from the fourth end, and the second end is used for outputting the second high voltage.

[0021] When the input signal is a first ground voltage, the third end is connected to the fourth end, and the first end is disconnected from the second end, and the fourth end is used for outputting the second ground voltage.

[0022] When the input signal is a first disconnection voltage, the first end is disconnected from the second end, and the third end is disconnected from the fourth end, and the second end and the fourth end are both used for outputting the second disconnection voltage.

[0023] Optionally, the first input module comprises:

[0024] a first current-limiting resistor, the first current-limiting resistor being connected between the input end of the first input module and the first anode;

[0025] a first access power supply, the first access power supply being connected to the first cathode.

[0026] The second input module comprises:

[0027] a second current-limiting resistor, the second current-limiting resistor being connected between the input end of the second input module and the second anode;

[0028] a second access power supply, the second access power supply being connected to the second cathode.

[0029] When the input signal is a first high voltage, the current of the first input module is greater than a first preset current, and the current of the second input module is less than a second preset current, wherein the first preset current is a minimum current that can make the first end and the second end be connected, and the second preset current is a minimum current that can make the third end and the fourth end be connected.

[0030] When the input signal is a first ground voltage, the current of the first input module is less than the first preset current, and the current of the second input module is greater than the second preset current.

[0031] When the input signal is a first disconnect voltage, the current of the first input module is less than the first preset current, and the current of the second input module is less than the second preset current.

[0032] Optionally, the first output module comprises:

[0033] a first output power supply connected to the first end.

[0034] The second input module comprises:

[0035] a second output power supply connected to the third end.

[0036] The second end is connected to an output end of the first output module, and the fourth end is connected to an output end of the second output module.

[0037] Optionally, the control module further comprises:

[0038] a first discharge member, one end of the first discharge member being connected to the first anode and the other end being connected to the first cathode, when the difference between the voltage of the other end of the first discharge member and the voltage of the one end of the first discharge member is greater than the turn-on voltage of the first discharge member, the first discharge member can make the first anode and the first cathode be connected.

[0039] a second discharge member, one end of the second discharge member being connected to the second anode and the other end being connected to the second cathode, when the difference between the voltage of the other end of the second discharge member and the voltage of the one end of the second discharge member is greater than the turn-on voltage of the second discharge member, the second discharge member can make the second anode and the second cathode be connected.

[0040] Optionally, the relay is an optical coupling relay.

[0041] The application has the following beneficial effects:

[0042] Since the input end of the first input module is connected with the input end of the second input module, and the connection is used for accessing the input signal, when the input signal is of different voltage values, the control output end can output corresponding voltage values, so that the operation convenience of the discrete quantity acquisition circuit is obviously improved. BRIEF DESCRIPTION OF DRAWINGS

[0043] Other features, objects, and advantages of the application will become more apparent from the following detailed description of non-limiting embodiments thereof, read in conjunction with the accompanying drawings:

[0044] Figure 1 A connection diagram of the discrete quantity acquisition circuit provided in the embodiment of the application;

[0045] Figure 2 A connection diagram of the discrete quantity acquisition circuit in the prior art.

[0046] Reference signs in the drawings: 10, relay; ANODE1, first anode; CATHODE1, first cathode; ANODE2, second anode; CATHODE2, second cathode; OUT11, first end; OUT12, second end; OUTR1, third end; OUTU1, fourth end; R1, first current-limiting resistor; U1, first access power supply; R2, second current-limiting resistor; U2, second access power supply; U3, first output voltage; U4, second output voltage; V1, first bleeder; V2, second bleeder. DETAILED DESCRIPTION

[0047] The application will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related application, and not to limit the application. In addition, it should be noted that, for the convenience of description, only the parts related to the application are shown in the drawings.

[0048] It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other without conflict. The application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0049] Reference should be made to Figure 1 A discrete quantity acquisition circuit with improved operation convenience provided in the embodiment includes:

[0050] A control module, the control module includes a first input end, a second input end, and a control output end;

[0051] A first input module, the output end of the first input module is connected to the first input end;

[0052] a second input module, an output end of the second input module is connected to the second input end, an input end of the first input module is connected to an input end of the second input module, and the connection is used for accessing the input signal, which is marked as INPUT in the figure;

[0053] when the input signal is a first high voltage, the control output end outputs a second high voltage;

[0054] when the input signal is a first ground voltage, the control output end outputs a second ground voltage;

[0055] when the input signal is a first open voltage, the control output end outputs a second open voltage.

[0056] Since the input end of the first input module is connected to the input end of the second input module, and the connection is used for accessing the input signal, when the input signal is different voltage values, the control output end can output corresponding voltage values, and therefore the operation convenience of the discrete quantity acquisition circuit is obviously improved.

[0057] In a preferred embodiment for further improving the operation convenience of the discrete quantity acquisition circuit, the control output end includes a first output end and a second output end, and the discrete quantity acquisition circuit further includes:

[0058] a first output module, an input end of the first output module is connected to the first output end;

[0059] a second output module, an input end of the second output module is connected to the second output end, an output end of the first output module is connected to an output end of the second output module, and the connection is used for leading out an output signal, which is marked as OUTPUT in the figure.

[0060] Since the output end of the first output module is connected to the output end of the second output module, and the connection is used for leading out an output signal, compared with the prior art in which different output ends are needed to receive input signals with different voltage values, the operation convenience is effectively improved.

[0061] In a preferred embodiment of the control module, the control module is a relay 10, the first input end includes a first anode ANODE1 and a first cathode CATHODE1 connected to each other;

[0062] the second input end includes a second anode ANODE2 and a second cathode CATHODE2 connected to each other;

[0063] the first output end includes a first end OUT11 and a second end OUT12;

[0064] The second output end comprises a third end OUTR1 and a fourth end OUTU1;

[0065] The first input end is connected with the first output end, and the second input end is connected with the second output end;

[0066] When the input signal is a first high voltage, the first end OUT11 is connected with the second end OUT12, and the third end OUT21 is disconnected with the fourth end OUT22, and the second end OUT12 is used for outputting the second high voltage;

[0067] When the input signal is a first ground voltage, the third end OUT21 is connected with the fourth end OUT22, and the first end OUT11 is disconnected with the second end OUT12, and the fourth end OUT22 is used for outputting the second ground voltage;

[0068] When the input signal is a first disconnection voltage, the first end OUT11 is disconnected with the second end OUT12, and the third end OUT21 is disconnected with the fourth end OUT22, and the second end OUT12 and the fourth end OUT22 are both used for outputting the second disconnection voltage.

[0069] As can be seen from the above, the relay 10 comprises two control systems, which are respectively used for converting signals inputted at the connection of the input ends of the two input modules, and when the current of the first input module is greater than a first preset current, the first end OUT11 is connected with the second end OUT12; when the current of the second input module is greater than a second preset current, the third end OUT21 is connected with the fourth end OUT22, thus only need to input the second high voltage on any one of the first end OUT11 and the second end OUT12, and input the second ground voltage on any one of the third end OUT21 and the fourth end OUT22, so as to realize the conversion of the input signal.

[0070] In the preferred embodiments of the first input module and the second input module, the first input module comprises:

[0071] A first current-limiting resistor R1, which is connected between the input end of the first input module and the first anode ANODE1;

[0072] A first input power supply U1, which is connected to the first cathode CATHODE1;

[0073] The second input module comprises:

[0074] a second current-limiting resistor R2 connected between the input end of the second input module and the second anode ANODE2;

[0075] a second access power supply U2 connected to the second cathode CATHODE2.

[0076] When the input signal is a first high voltage, the current of the first input module is greater than a first preset current, and the current of the second input module is less than a second preset current, wherein the first preset current is the minimum current that can connect the first end OUT11 and the second end OUT12; and the second preset current is the minimum current that can connect the third end OUT21 and the fourth end OUT22.

[0077] When the input signal is a first ground voltage, the current of the first input module is less than the first preset current, and the current of the second input module is greater than the second preset current.

[0078] When the input signal is a first disconnection voltage, the current of the first input module is less than the first preset current, and the current of the second input module is less than the second preset current.

[0079] According to the components and connection relationship of each device in the first input module and the second input module, the ratio of the difference between the first high voltage and the voltage of the first access power supply U1 to the resistance value of the first current-limiting resistor R1 is the current of the first input module; and the ratio of the difference between the second high voltage and the voltage of the second access power supply U2 to the resistance value of the second current-limiting resistor R2 is the current of the second input module. According to the above setting, the control of the relay 10 by the input signal can be realized.

[0080] In the preferred embodiment of the first output module and the second output module, the first output module comprises:

[0081] a first output power supply U3, denoted as U3 in the figure, connected to the first end OUT11;

[0082] The second input module comprises:

[0083] a second output power supply U4, denoted as U4 in the figure, connected to the third end OUT21;

[0084] The second end OUT12 is connected to the output end of the first output module, and the fourth end OUT22 is connected to the output end of the second output module.

[0085] From the connection relationship between the constituent devices of the first output module and the second output module and the relay 10, it can be seen that the voltage value of the first output power supply U3 is the second high voltage, and the voltage value of the second output power supply U4 is the second ground voltage. Through the above setting, the control of the relay 10 on the voltage value of the output signal can be realized.

[0086] In the preferred embodiment of maintaining the accuracy of the transmission signal, the control module further comprises:

[0087] A first bleeder V1, one end of the first bleeder V1 is connected to the first anode ANODE1, and the other end is connected to the first cathode CATHODE1. When the voltage difference between the other end of the first bleeder V1 and the voltage of one end of the first bleeder V1 is greater than the turn-on voltage thereof, the first bleeder V1 can turn on the first anode ANODE1 and the first cathode CATHODE1.

[0088] A second bleeder V2, one end of the second bleeder V2 is connected to the second anode ANODE2, and the other end is connected to the second cathode CATHODE2. When the voltage difference between the other end of the second bleeder V2 and the voltage of one end of the second bleeder V2 is greater than the turn-on voltage thereof, the second bleeder V2 can turn on the second anode ANODE2 and the second cathode CATHODE2.

[0089] Since the first anode ANODE1 and the first cathode CATHODE1 in the relay 10 often have a capacitor device, after the input end of the first input module is disconnected from the input signal, the control output end will still generate a corresponding output value due to the action of the capacitor device. Similarly, the same phenomenon occurs for the second input module. However, in this acquisition circuit, the first bleeder V1 and the second bleeder V2 are added. When the input signal is cut off, the first bleeder V1 and the second bleeder V2 can turn on the capacitor device, thereby not affecting the output of the control output end.

[0090] In the preferred embodiment of improving the anti-interference ability of the acquisition circuit, the relay 10 is an optical coupling relay.

[0091] Since the relay 10 is an optical coupling relay, the anti-electromagnetic interference ability of the acquisition circuit has been significantly improved.

[0092] The above description is only the preferred embodiment of the present application and the explanation of the technical principles. It should be understood by those skilled in the art that the scope of the protection of the present application is not limited to the technical solutions formed by the specific combinations of the above technical features. It should also cover other technical solutions formed by the combinations of the above technical features or their equivalent features without departing from the concept of the present application. For example, the technical solutions formed by the mutual replacement of the above features and the technical features with similar functions disclosed (but not limited to) in the present application.

Claims

1. A discrete quantity acquisition circuit, characterized by, The application relates to a control module, a first input module and a second input module. The control module comprises a first input end, a second input end and a control output end. The first input module is connected to the first input end. The second input module is connected to the second input end, and the input end of the first input module is connected to the input end of the second input module. When the input signal is a first high voltage, the control output end outputs a second high voltage. When the input signal is a first ground voltage, the control output end outputs a second ground voltage. When the input signal is a first open voltage, the control output end outputs a second open voltage. When the input signal is a first high voltage, the current of the first input module is greater than a first preset current, and the current of the second input module is less than a second preset current. When the input signal is a first ground voltage, the current of the first input module is less than the first preset current, and the current of the second input module is greater than the second preset current. When the input signal is a first open voltage, the current of the first input module is less than the first preset current, and the current of the second input module is less than the second preset current.

2. The discrete quantity acquisition circuit of claim 1, wherein, The control output end comprises a first output end and a second output end. The first output module is connected to the first output end. The second output module is connected to the second output end, and the output end of the first output module is connected to the output end of the second output module.

3. The discrete quantity acquisition circuit of claim 2, wherein, The control module is a relay (10), the first input end comprises a first anode ANODE1 and a first cathode CATHODE1 connected in series, the second input end comprises a second anode ANODE2 and a second cathode CATHODE2 connected in series, the first output end comprises a first end OUT11 and a second end OUT12, the second output end comprises a third end OUT21 and a fourth end OUT22, the first input end is connected to the first output end, and the second input end is connected to the second output end. When the input signal is a first high voltage, the first end OUT11 is connected to the second end OUT12, and the third end OUT21 is disconnected from the fourth end OUT22, and the second end OUT12 is used for outputting the second high voltage. When the input signal is a first ground voltage, the third end OUT21 is connected to the fourth end OUT22, and the first end OUT11 is disconnected from the second end OUT12, and the fourth end OUT22 is used for outputting the second ground voltage. ​ ​ ​ ​ When the input signal is a first off voltage, the first end OUT11 is disconnected from the second end OUT12, and the third end OUT21 is disconnected from the fourth end OUT22, and the second end OUT12 and the fourth end OUT22 are both used to output the second off voltage.

4. The discrete quantity acquisition circuit of claim 3, wherein, The first input module comprises: A first current-limiting resistor R1 connected between an input end of the first input module and the first anode ANODE1; A first access power supply U1 connected to the first cathode CATHODE1; The second input module comprises: A second current-limiting resistor R2 connected between an input end of the second input module and the second cathode CATHODE2; A second access power supply U2 connected to the second anode ANODE2; When the input signal is a first high voltage, the current of the first input module is greater than a first preset current, and the current of the second input module is less than a second preset current, wherein the first preset current is the minimum current that can turn on the first end OUT11 and the second end OUT12; and the second preset current is the minimum current that can turn on the third end OUT21 and the fourth end OUT22; When the input signal is a first ground voltage, the current of the first input module is less than the first preset current, and the current of the second input module is greater than the second preset current; When the input signal is a first off voltage, the current of the first input module is less than the first preset current, and the current of the second input module is less than the second preset current.

5. The discrete quantity acquisition circuit of claim 3, wherein, The first output module comprises: A first output power supply U3 connected to the first end OUT11; The second input module comprises: A second output power supply U4 connected to the third end OUT21; The second end OUT12 is connected to an output end of the first output module, and the fourth end OUT22 is connected to an output end of the second output module.

6. The discrete quantity acquisition circuit of claim 3, wherein, The control module further comprises: A first bleeder V1, one end of the first bleeder V1 is connected to the first anode 15 ANODE1, and the other end is connected to the first cathode CATHODE1, when the difference between the voltage at the other end of the first bleeder V1 and the voltage at one end of the first bleeder V1 is greater than the turn-on voltage, the first bleeder V1 can turn on the first anode ANODE1 and the first cathode CATHODE1; A second discharge element V2, one end of the second discharge element V2 is connected to the second anode ANODE2, the other end of the second discharge element V2 is connected to the second cathode CATHODE2, when the voltage difference between the other end of the second discharge element V2 and the one end of the second discharge element V2 is greater than the conduction voltage of the second discharge element V2, the second discharge element V2 can conduct the second anode ANODE2 and the second cathode CATHODE2.

7. The discrete quantity acquisition circuit of any of claims 3-5, wherein, The relay (10) is an optical coupling relay.

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