CN210572619U - Conduction state detection circuit and relay - Google Patents
Conduction state detection circuit and relay Download PDFInfo
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- CN210572619U CN210572619U CN201921343338.1U CN201921343338U CN210572619U CN 210572619 U CN210572619 U CN 210572619U CN 201921343338 U CN201921343338 U CN 201921343338U CN 210572619 U CN210572619 U CN 210572619U
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- detection circuit
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- contact
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Abstract
The utility model provides a conduction state detection circuitry and relay, conduction state detection circuitry's first end links to each other with the first end of the contact of relay, conduction state detection circuitry's second end links to each other with the second end of the contact of relay, through conduction state detection circuitry is direct right the conduction state at the both ends of the contact of relay detects, and the testing result is reliable, has guaranteed user and electrical equipment's security.
Description
Technical Field
The utility model relates to an integrated circuit technical field, concretely relates to on-state detection circuitry and relay.
Background
At present, in the electronic and electrical fields, the application range of the relay is wider, and particularly in strong-current equipment, the reliability of the action of the relay is directly related to whether the electrical equipment can be normally used and the personal safety of operators.
How to reliably detect the state of relay contact has vital meaning to safe power consumption, and the state of relay main contact is detected through the state indirect detection relay main contact of detecting auxiliary contact to current scheme, and this detection method limitation is big, needs the relay to have auxiliary contact just can detect to there is the condition that main contact and auxiliary contact action are inconsistent to lead to the false detection of contact state, has certain potential safety hazard.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the present invention provides a conduction state detection circuit and a relay, so as to realize reliable detection of on-off state of a relay contact.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:
a first end of the conduction state detection circuit is connected with a first end of a contact of a relay, and a second end of the conduction state detection circuit is connected with a second end of the contact of the relay.
Optionally, in the above conduction state detection circuit, the conduction state detection circuit at least includes a first dc power supply and an alarm element, and the first dc power supply and the alarm element are connected in series.
Optionally, in the on-state detection circuit, the warning element is a light emitting device.
Optionally, in the on-state detection circuit, the alarm element is an optical coupler;
a light emitting device of the optical coupler is connected with the first direct current power supply in series;
the input end of the light receiving element of the optical coupler is connected with the second direct current power supply, and the output end of the light receiving element of the optical coupler is connected with the single chip microcomputer.
Optionally, the on-state detection circuit further includes:
and the singlechip is used for outputting prompt information for representing the electrification of the relay when detecting a trigger signal output by a light receiving element of the optical coupler.
Optionally, the on-state detection circuit further includes:
and the unidirectional diode and the current-limiting resistor are connected with the first direct current power supply and the alarm element in series.
Optionally, in the conduction state detection circuit, an anode of the unidirectional diode is connected to a current output end of a contact of the relay, a cathode of the unidirectional diode is connected to a cathode of the first dc power supply, an anode of the first dc power supply is connected to a first end of the current limiting resistor, a second end of the current limiting resistor is connected to a first end of the alarm element, and a second end of the alarm element is connected to a current input end of the contact.
Optionally, in the conduction state detection circuit, an anode of the unidirectional diode is connected to a current output end of a contact of the relay, a cathode of the unidirectional diode is connected to a first end of the current limiting resistor, a second end of the current limiting resistor is connected to a cathode of the first dc power supply, an anode of the first dc power supply is connected to a first end of the alarm element, and a second end of the alarm element is connected to a current input end of the contact.
Optionally, in the conduction state detection circuit, a control switch for controlling a working state of the conduction state detection circuit is configured in the conduction state detection circuit.
A relay comprising the conduction state detection circuit of any one of the above.
Based on above-mentioned technical scheme, the embodiment of the utility model provides an among the above-mentioned scheme, it is direct right through on-state detection circuitry the contact both ends of relay are measured, are detected the both ends of the contact of relay switch on, export corresponding prompt information, and it is visible by above-mentioned scheme the embodiment of the utility model discloses among the technical scheme, through on-state detection circuitry is direct right the on-state at the both ends of the contact of relay detects, and the testing result is reliable, has guaranteed user and electrical equipment's security.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic view of an application scenario of a conduction state detection circuit disclosed in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a conduction state detection circuit disclosed in an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a conduction state detection circuit according to another embodiment of the present invention;
fig. 4 is a schematic structural diagram of a conducting state detection circuit according to another embodiment of the present invention;
fig. 5 is a schematic structural diagram of a conducting state detection circuit according to yet another embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In order to realize right the reliable detection of the on-state of the contact of relay, the utility model discloses a with the on-state detection circuitry of relay adaptation, it is specific, see figure 1, the first end of on-state detection circuitry links to each other with the first end of the contact of relay, the second end of on-state detection circuitry links to each other with the second end of the contact of relay.
Work as when the contact of relay is closed, on-state detection circuitry detects the both ends of the contact of relay switch on, output corresponding prompt information, it is visible by above-mentioned scheme the utility model discloses in the technical scheme, through on-state detection circuitry is direct right the on-state at the both ends of the contact of relay detects, and the testing result is reliable, has guaranteed user and electrical equipment's security.
In the technical solution disclosed in the application embodiment, the specific structure of the on-state detection circuit can be selected by the user as long as it can output corresponding prompt information when detecting that both ends of the contact of the relay are turned on, for example, see fig. 2. in the above-mentioned solution disclosed in the above-mentioned embodiment of the present invention, the on-state detection circuit at least includes a first dc power VCC1 and an alarm element a, the first dc power VCC1 and the alarm element a are connected in series, a first end of a series branch composed of the first dc power VCC1 and the alarm element a is used as a first end of the on-state detection circuit, a second end of the series branch is used as a first end of the on-state detection circuit, when the contact of the relay is closed, a loop is formed between the first dc power VCC1 and the alarm element a, the anodal output current of first direct current power VCC1 flows through warning component A with behind the contact of relay, flow back to first direct current power VCC 1's negative pole, warning component A when having the electric current to flow through, output corresponding warning signal to indicate this moment to the user the contact of relay is closed, works as when the contact is in the off-state, because the contact disconnection, first direct current power VCC1 with can't constitute the return circuit between the warning component A, consequently, there is not the electric current to flow through warning component A, warning component A is out of work, and at this moment, the user can pass through warning component A's operating condition judges the current state of the contact of relay. Wherein, warning element A can be light warning element A or bee calling organ etc. among the technical scheme disclosed in the embodiment of the utility model, it is preferred light warning element A, and at this moment, it specifically can be emitting diode, is lighted when emitting diode has the electric current to flow through.
In another embodiment of the present invention, the alarm element a may also be an optical coupler; the light emitting device of the optical coupler is connected with the first direct current power supply VCC1 in series; the input end of the light receiving element of the optical coupler is connected with a second direct current power supply VCC2, the output end of the light receiving element of the optical coupler is connected with the single chip microcomputer, a pull-up resistor can be arranged between the second direct current power supply VCC2 and the optical coupler, at the moment, the input end of the light emitting element of the optical coupler is used as the first end of the alarm element A, the output end of the light emitting element of the optical coupler is used as the second end of the alarm element A, when the contact of the relay is conducted, the current output by the first direct current power supply VCC1 flows in from the input end of the light emitting element of the optical coupler and flows out from the output end of the light emitting element of the optical coupler, the light emitting element emits light, the light receiving element is conducted after receiving light, the current of the second current source is output after passing through the light receiving element, and the current signal output by the light receiving element is, when the single chip microcomputer obtains the signal, pre-storing operation is executed according to the signal, the pre-storing operation is executed by executing a program code pre-stored in the single chip microcomputer, and after the code is executed, a prompt signal for representing that the relay is electrified is output. The single chip microcomputer can be used as a part of the conduction state detection circuit, integrated on a PCB board corresponding to the conduction state detection circuit, and also used as a lower-level element of the conduction state detection circuit.
Furthermore, the on-state detection circuit may further include a unidirectional diode D1 and a current limiting resistor R1, the current limiting resistor R1 is configured to prevent the alarm element a from being burnt out due to an excessive current in the on-state detection circuit, and the unidirectional diode D1 is configured to control a current flowing direction in the on-state detection circuit.
In the above-mentioned scheme disclosed by the embodiment of the utility model, the position relation between one-way diode D1, current-limiting resistor R1, first direct current source VCC1 and the warning element A can be selected by oneself according to user's demand, as long as can keep establishing ties between these elements can. For example, referring to fig. 3, an anode of the unidirectional diode D1 is connected to a current output terminal of a contact of the relay, a cathode of the unidirectional diode D1 is connected to a cathode of the first dc power VCC1, an anode of the first dc power VCC1 is connected to a first end of the current limiting resistor R1, a second end of the current limiting resistor R1 is connected to a first end of the alarm element a, and a second end of the alarm element a is connected to a current input terminal of the contact, where in the embodiment disclosed in fig. 3, the alarm element a may specifically be an optocoupler. For example, referring to fig. 4, an anode of the unidirectional diode D1 is connected to a current output terminal of a contact of the relay, a cathode of the unidirectional diode D1 is connected to a first terminal of the current limiting resistor R1, a second terminal of the current limiting resistor R1 is connected to a cathode of the first dc power source VCC1, an anode of the first dc power source VCC1 is connected to a first terminal of the alarm element a, and a second terminal of the alarm element a is connected to a current input terminal of the contact, and in the embodiment disclosed in fig. 4, the alarm element a may also be an optocoupler. In the embodiment corresponding to fig. 3 and 4, when the relay contact to be detected is opened, the on-state detection circuit is not turned on, and a closed loop cannot be formed, that is, no current is generated in the loop, the primary side (light emitting element) of the optical coupler does not emit light, and the secondary side (light receiving element) of the optical coupler is not turned on, and in this state, the state detected by the single chip microcomputer MCU is the state in which the relay is opened. When the relay contact is closed, the conduction state detection circuit is conducted to form a closed loop, current is generated in the loop, the primary side of the optical coupler emits light to drive the secondary side to be conducted, and in the state, the state detected by the single chip microcomputer MCU is the closed state of the relay to be detected.
Referring to fig. 5, based on the technical solutions disclosed in the above embodiments, a control switch K may be further added in the on-state detection circuit, and when the state of the relay to be detected does not need to be detected, the control switch K is turned off, and the on-state detection circuit is in an off state at this time, which is aimed at two points: 1, reducing the power consumption of the system, and enabling a conducting state detection circuit to be out of work by a user in a mode of switching off a control switch K when the state of a relay to be detected does not need to be detected; 2, improve the security, can guarantee that direct current bus output and load end do not have electrical connection after control switch K breaks off, detect the current input end and the current output end of relay and keep apart completely promptly. The specific type of the control switch K can be selected according to the user requirement, for example, the control switch K is a relay control switch K or a power switch tube.
It can be seen by the technical scheme that each above-mentioned embodiment discloses, when adopting the utility model discloses when the last electric state of switch on state detection circuitry detection relay's contact, need not detect the state of relay main contact through auxiliary contact's form, the testing result is more reliable, and do not receive the restriction that the relay has or not auxiliary contact, promptly, this scheme can detect the last electric state of the contact of the relay that does not have auxiliary contact, and, examine time measuring at the last electric state to the relay, need not detect the state of contactor main contact through bus voltage, electric current, it is safer.
Corresponding with above-mentioned on-state detection circuitry, the utility model also discloses a relay, the relay is used the utility model discloses an above-mentioned arbitrary embodiment discloses on-state detection circuitry.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A conducting state detection circuit is characterized in that a first end of the conducting state detection circuit is connected with a first end of a contact of a relay, and a second end of the conducting state detection circuit is connected with a second end of the contact of the relay.
2. The conduction state detection circuit according to claim 1, wherein the conduction state detection circuit comprises at least a first direct current power supply and an alarm element, the first direct current power supply and the alarm element being connected in series.
3. The on-state detection circuit according to claim 2, wherein the warning element is a light emitting device.
4. The conduction state detection circuit according to claim 2, wherein the alarm element is an optocoupler;
a light emitting device of the optical coupler is connected with the first direct current power supply in series;
the input end of the light receiving element of the optical coupler is connected with the second direct current power supply, and the output end of the light receiving element of the optical coupler is connected with the single chip microcomputer.
5. The on-state detection circuit according to claim 4, further comprising:
and the singlechip is used for outputting prompt information for representing the electrification of the relay when detecting a trigger signal output by a light receiving element of the optical coupler.
6. The on-state detection circuit according to claim 2, further comprising:
and the unidirectional diode and the current-limiting resistor are connected with the first direct current power supply and the alarm element in series.
7. The conduction state detection circuit according to claim 6, wherein an anode of the unidirectional diode is connected to a current output terminal of a contact of the relay, a cathode of the unidirectional diode is connected to a cathode of the first DC power supply, an anode of the first DC power supply is connected to a first end of the current limiting resistor, a second end of the current limiting resistor is connected to a first end of the alarm element, and a second end of the alarm element is connected to a current input terminal of the contact.
8. The conduction state detection circuit according to claim 6, wherein an anode of the unidirectional diode is connected to a current output terminal of a contact of the relay, a cathode of the unidirectional diode is connected to a first terminal of the current limiting resistor, a second terminal of the current limiting resistor is connected to a cathode of the first DC power supply, an anode of the first DC power supply is connected to a first terminal of the alarm element, and a second terminal of the alarm element is connected to a current input terminal of the contact.
9. The conduction state detection circuit according to claim 1, wherein a control switch for controlling an operation state of the conduction state detection circuit is provided in the conduction state detection circuit.
10. A relay, characterized by comprising the conduction state detection circuit according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921343338.1U CN210572619U (en) | 2019-08-19 | 2019-08-19 | Conduction state detection circuit and relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921343338.1U CN210572619U (en) | 2019-08-19 | 2019-08-19 | Conduction state detection circuit and relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210572619U true CN210572619U (en) | 2020-05-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921343338.1U Active CN210572619U (en) | 2019-08-19 | 2019-08-19 | Conduction state detection circuit and relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210572619U (en) |
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2019
- 2019-08-19 CN CN201921343338.1U patent/CN210572619U/en active Active
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