CN204166321U - For the input circuit pulse-detecting circuit of safety feature - Google Patents
For the input circuit pulse-detecting circuit of safety feature Download PDFInfo
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- CN204166321U CN204166321U CN201420576053.3U CN201420576053U CN204166321U CN 204166321 U CN204166321 U CN 204166321U CN 201420576053 U CN201420576053 U CN 201420576053U CN 204166321 U CN204166321 U CN 204166321U
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Abstract
The utility model discloses a kind of input circuit pulse-detecting circuit for safety feature, comprise pulse-generating circuit, and at least one input circuit, described pulse-generating circuit comprises: produce and export the microprocessor of micro-detection pulse; And the pulse switching circuit that amplification forms also output detections pulse is carried out to this micro-detection pulse; Described input circuit comprises: switching tube, its input end as described inputting testing terminal, the described switching tube conducting when described detection pulse is high level, the described switching tube cut-off when described detection pulse is low level; And comparator circuit, its input end couples the output terminal of described switching tube, and compared with reference signal by the signal that switching tube exports, comparison signal is transferred to described microprocessor to judge that whether described input circuit is normal by its output terminal.The utility model can detect the correctness of input circuit, thus prevents the input signal for safety feature to make mistakes the maloperation caused.
Description
Technical field
The utility model relates to security fields, particularly relates to the input circuit pulse-detecting circuit for safety feature.
Background technology
In the industrial circle of the safety features such as safety relay, general applied voltage amplitude 24v is as input signal (pulse signal or level signal), but the signal of 24v can not be directly inputted in chip circuit as input signal and uses, need to carry out repairing the input signal exporting suitable amplitude to amplitude by input circuit, such as high level amplitude is the input signal of 3.3v.If when input circuit is abnormal (such as internal short circuits), its input signal exported also can correspondingly go wrong, thus causes the misoperation of safety feature, brings potential safety hazard to operator and scene.
Utility model content
The purpose of this utility model is to provide a kind of input circuit pulse-detecting circuit for safety feature, can detect the correctness of input circuit, thus prevents the input signal for safety feature to make mistakes the maloperation caused.
In order to solve the problems of the technologies described above, the utility model adopts following technical scheme: a kind of input circuit pulse-detecting circuit for safety feature, comprises pulse-generating circuit, and it is for generation of detection pulse; And at least one input circuit, whether it is normal to detect described input circuit for receiving described detection pulse, and it has an inputting testing terminal, and this port can be used for receiving described detection pulse;
Wherein, described pulse-generating circuit comprises: produce and export the microprocessor of micro-detection pulse; And the pulse switching circuit that amplification forms also output detections pulse is carried out to this micro-detection pulse;
Described input circuit comprises: switching tube, its input end is as described inputting testing terminal, described detection pulse is coupled to described inputting testing terminal, the described switching tube conducting when described detection pulse is high level, the described switching tube cut-off when described detection pulse is low level; And comparator circuit, its input end couples the output terminal of described switching tube, and compared with reference signal by the signal that switching tube exports, comparison signal is transferred to described microprocessor to judge that whether described input circuit is normal by its output terminal.
According to an embodiment of the present utility model, described microprocessor is the single-chip microcomputer of model STM32F429.
According to an embodiment of the present utility model, described switching tube is configured to N-type MOS transistor, and its source electrode receives described detection pulse, its grounded-grid, and its drain electrode is coupled to described comparator circuit as the output terminal of described switching tube.
According to an embodiment of the present utility model, described reference signal is produced by bleeder circuit.
According to an embodiment of the present utility model, the pulse switching circuit forming detection pulse for carrying out amplification to micro-detection pulse is realized by power switch integrated circuit, the input end of power switch integrated circuit inputs micro-detection pulse, its power end input supply voltage, its output terminal output supply voltage when micro-detection pulse is high level, to be formed and to export the detection pulse relative to described micro-detection pulse amplification.
According to an embodiment of the present utility model, described power switch integrated circuit model is BSP452.
According to an embodiment of the present utility model, also comprise impulse response and promote circuit, its input end receives described micro-detection pulse, its responder is coupled to the output terminal of described pulse switching circuit by resistance, and the responder that described micro-detection pulse control pulses response promotes circuit drags down level and responds fast to make pulse switching circuit.
According to an embodiment of the present utility model, described impulse response promotes circuit and comprises: pulse transfer circuit, and the triode that base stage is connected by resistance with emitter, the grounded emitter of triode, its collector is coupled to the output terminal of described power switch integrated circuit by resistance, drags down level with coupling respond fast to make pulse switching circuit in micro-detection pulse by transistor collector during pulse transfer circuit control triode ON.
According to an embodiment of the present utility model, described input circuit is also for generation of input signal, and its inputting testing terminal receives pumping signal and exports the work of input signal for described safety feature at the output terminal of comparator circuit.
After adopting technique scheme, the utility model compared with prior art has following outstanding advantages: input circuit can be used for the respective magnitudes (such as 24V) inputted in commercial Application signal thus export the input signal being used for safety feature, in this programme, input circuit can also be used to input and detects pulse thus the correctness detecting input circuit, the detection pulse identical with voltage magnitude in commercial Application is produced by pulse-generating circuit, the keying of this detection Pulse Width Control switching tube, thus compare with reference signal in output corresponding signal to comparator circuit, result transfers in microprocessor and judges the whether normal of input circuit by comparator circuit, microprocessor display detects the level height of pulse can corresponding consistent (the corresponding high level of such as high level with the result that comparator circuit exports, the corresponding low level of low level, or, the corresponding low level of high level, the corresponding high level of low level) time, confirmation input circuit is normal, thus this input circuit can be used for access industrial pumping signal and produces input signal in the work of safety feature.
Accompanying drawing explanation
Fig. 1 is the structural representation of the input circuit pulse-detecting circuit for safety feature of the utility model embodiment;
Fig. 2 is the structural representation of the comparator circuit of the utility model embodiment;
Fig. 3 is the structural representation of the impulse response lifting circuit of the utility model embodiment.
Embodiment
For enabling above-mentioned purpose of the present utility model, feature and advantage become apparent more, are described in detail embodiment of the present utility model below in conjunction with accompanying drawing.
Set forth a lot of detail in the following description so that fully understand the utility model.But the utility model can be much different from alternate manner described here to implement, those skilled in the art can when doing similar popularization without prejudice to when the utility model intension, and therefore the utility model is by the restriction of following public concrete enforcement and concrete accompanying drawing.
A kind of input circuit pulse-detecting circuit for safety feature of the present utility model, comprises pulse-generating circuit and at least one input circuit.Referring to Fig. 1, pulse-generating circuit 1 produces and detects pulse, particularly first microprocessor 11 produces a default micro-detection pulse mPul, according to an embodiment of the present utility model, described microprocessor 11 is the single-chip microcomputer of model STM32F429, the restriction of the voltage of work itself is suitable for due to microprocessor 11, the voltage magnitude of this micro-detection pulse mPul is lower, in order to the inputting testing terminal P1 mating input circuit 2 receives the demand of industrial 24V signal, the voltage magnitude of this micro-detection pulse mPul is carried out lifting, thus pulse switching circuit 12 is transmitted it to, high level amplification is carried out to this micro-detection pulse mPul, and at the output terminal output detections pulse Pul (such as voltage magnitude is 24V) of pulse switching circuit 12, the voltage magnitude of this detection pulse Pul can mate with the voltage magnitude of the inputting testing terminal P1 being input to input circuit 2 in industry, thus input circuit 2 can be made directly to change to the industrial pumping signal of reception after reception detects pulse Pul detection.
According to an embodiment of the present utility model, the pulse switching circuit 12 forming detection pulse Pul for carrying out amplification to micro-detection pulse mPul is realized by power switch integrated circuit, such as described power switch integrated circuit model can be BSP452, the input end of power switch integrated circuit inputs micro-detection pulse mPul, its power end input supply voltage, such as 24V, when micro-detection pulse is high level, power switch integrated circuit controls its output terminal and its input end conducting thus output supply voltage, when micro-detection pulse is low level, power switch integrated circuit controls its output terminal and its input end ends thus output low level, continue low and high level alternately and formed detection pulse Pul, the amplitude of this detection pulse Pul is relative to amplification described micro-detection pulse mPul, highest amplitude is such as corresponding 24V.
An input circuit 2 has been shown in Fig. 1, but be not limited thereto, it can be more input circuit, pulse-generating circuit 1 is selected to be connected in one of them input circuit to form input circuit pulse-detecting circuit and detect this input circuit, and the input circuit detected can be used for receiving industrial pumping signal and produces input signal and be applied in the work of safety feature.
Whether the inputting testing terminal of each input circuit can the detection pulse that exports of the output terminal of received pulse change-over circuit, normal to detect described input circuit.In Fig. 1, pulse switching circuit 1 and input circuit 2 are coupled by resistance R1, and input circuit 2 comprises: switching tube M1 and comparator circuit 21.Concrete, switching tube M1 is configured to N-type MOS transistor, and its source electrode receives described detection pulse Pul, its grounded-grid, and its drain electrode is coupled to described comparator circuit 21 as the output terminal of described switching tube M1 by resistance R2.The input end (source electrode) of switching tube M1 is as described inputting testing terminal P1, receive described detection pulse Pul, detecting pulse Pul is high level then described switching tube M1 conducting output high level, and detecting pulse Pul is low level then described switching tube M1 cut-off output low level; The input end of comparator circuit 21 couples the output terminal of described switching tube M1, compares with the reference signal (not shown) of comparator circuit 21, and whether comparison signal is transferred to described microprocessor 11 by its output terminal normal to judge described input circuit 2.
Fig. 2 shows a kind of comparator circuit, comprise the bleeder circuit and comparer COM that produce reference signal, concrete, this bleeder circuit is that resistance R3 and resistance R4 is to voltage VCC dividing potential drop output reference signal, this reference signal is input to the negative pole of comparer COM, this signal and reference signal compare by the signal that the positive pole input switch pipe M1 of comparer COM transmits, comparer COM, and the output signal of comparer COM transfers in microprocessor 11.
Described input circuit 2 in Fig. 1 is also for generation of input signal, and its inputting testing terminal P1 and pulse-generating circuit 1 disconnect, receive pumping signal, thus exports the work of input signal for described safety feature at the output terminal of comparator circuit 21.Input circuit 2, after detecting and determine that it normally, just can be used for receiving industrial pumping signal and produces input signal and be applied in the work of safety feature.Thus pulse-generating circuit 1 can continue selection is connected in other input circuits and forms input circuit pulse-detecting circuit and detect corresponding input circuit.
As preferred embodiment, in an embodiment, input circuit pulse-detecting circuit for safety feature also comprises impulse response and promotes circuit, its input end receives described micro-detection pulse mPul, its responder is coupled to the output terminal of described pulse switching circuit by resistance, and the responder that described micro-detection pulse mPul gating pulse response promotes circuit drags down level and responds fast to make power switch integrated circuit.
Referring to Fig. 3, described impulse response promotes circuit and comprises: pulse transfer circuit 31, and the triode Q1 that base stage is connected by resistance R5 with emitter, the grounded emitter of triode Q1, its collector is coupled to the output terminal P3 of described pulse switching circuit 12 by resistance R6, pulse transfer circuit 31 forms the micro-detection pulse mPul of transmission by resistance and being connected of electric capacity, its input end is connected with the input end P2 of pulse switching circuit 12, when micro-detection pulse mPul controls triode Q1 conducting by pulse transfer circuit 31, triode Q1 collector drags down level to make pulse switching circuit 12 response output detections pulse Pul fast with coupling.
In the utility model, input circuit can be used for the respective magnitudes (such as 24V) inputted in commercial Application signal thus export the input signal being used for safety feature, input circuit can also be used to input and detects pulse thus the correctness detecting input circuit, the detection pulse identical with voltage magnitude in commercial Application is produced by pulse-generating circuit, the keying of this detection Pulse Width Control switching tube, thus compare with reference signal in output corresponding signal to comparator circuit, result transfers in microprocessor and judges the whether normal of input circuit by comparator circuit, microprocessor display detects the level height of pulse can corresponding consistent (the corresponding high level of such as high level with the result that comparator circuit exports, the corresponding low level of low level, or, the corresponding low level of high level, the corresponding high level of low level) time, confirmation input circuit is normal, thus this input circuit can be used for access industrial pumping signal and produces input signal in the work of safety feature.
Although the utility model with preferred embodiment openly as above; but it is not for limiting claim; any those skilled in the art are not departing from spirit and scope of the present utility model; can make possible variation and amendment, the scope that therefore protection domain of the present utility model should define with the utility model claim is as the criterion.
Claims (9)
1. for an input circuit pulse-detecting circuit for safety feature, it is characterized in that, comprise pulse-generating circuit, it is for generation of detection pulse; And at least one input circuit, whether it is normal to detect described input circuit for receiving described detection pulse, and it has an inputting testing terminal, and this port can be used for receiving described detection pulse;
Wherein, described pulse-generating circuit comprises: produce and export the microprocessor of micro-detection pulse; And the pulse switching circuit that amplification forms also output detections pulse is carried out to this micro-detection pulse;
Described input circuit comprises: switching tube, its input end is as described inputting testing terminal, described detection pulse is coupled to described inputting testing terminal, the described switching tube conducting when described detection pulse is high level, the described switching tube cut-off when described detection pulse is low level; And comparator circuit, its input end couples the output terminal of described switching tube, and compared with reference signal by the signal that switching tube exports, comparison signal is transferred to described microprocessor to judge that whether described input circuit is normal by its output terminal.
2., as claimed in claim 1 for the input circuit pulse-detecting circuit of safety feature, it is characterized in that, described microprocessor is the single-chip microcomputer of model STM32F429.
3. as claimed in claim 1 for the input circuit pulse-detecting circuit of safety feature, it is characterized in that, described switching tube is configured to N-type MOS transistor, and its source electrode receives described detection pulse, its grounded-grid, its drain electrode is coupled to described comparator circuit as the output terminal of described switching tube.
4., as claimed in claim 1 for the input circuit pulse-detecting circuit of safety feature, it is characterized in that, described reference signal is produced by bleeder circuit.
5. as claimed in claim 1 for the input circuit pulse-detecting circuit of safety feature, it is characterized in that, the pulse switching circuit forming detection pulse for carrying out amplification to micro-detection pulse is realized by power switch integrated circuit, the input end of power switch integrated circuit inputs micro-detection pulse, its power end input supply voltage, its output terminal output supply voltage when micro-detection pulse is high level, to be formed and to export the detection pulse relative to described micro-detection pulse amplification.
6., as claimed in claim 5 for the input circuit pulse-detecting circuit of safety feature, it is characterized in that, described power switch integrated circuit model is BSP452.
7. the input circuit pulse-detecting circuit for safety feature as described in claim 5 or 6, it is characterized in that, also comprise impulse response and promote circuit, its input end receives described micro-detection pulse, its responder is coupled to the output terminal of described pulse switching circuit by resistance, and the responder that described micro-detection pulse control pulses response promotes circuit drags down level and responds fast to make power switch integrated circuit.
8. as claimed in claim 7 for the input circuit pulse-detecting circuit of safety feature, it is characterized in that, described impulse response promotes circuit and comprises: pulse transfer circuit, and the triode that base stage is connected by resistance with emitter, the grounded emitter of triode, its collector is coupled to the output terminal of described power switch integrated circuit by resistance, drags down level with coupling respond fast to make pulse switching circuit in micro-detection pulse by transistor collector during pulse transfer circuit control triode ON.
9. as claimed in claim 1 for the input circuit pulse-detecting circuit of safety feature, it is characterized in that, described input circuit is also for generation of input signal, and its inputting testing terminal receives pumping signal and exports the work of input signal for described safety feature at the output terminal of comparator circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420576053.3U CN204166321U (en) | 2014-10-08 | 2014-10-08 | For the input circuit pulse-detecting circuit of safety feature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420576053.3U CN204166321U (en) | 2014-10-08 | 2014-10-08 | For the input circuit pulse-detecting circuit of safety feature |
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| Publication Number | Publication Date |
|---|---|
| CN204166321U true CN204166321U (en) | 2015-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420576053.3U Expired - Fee Related CN204166321U (en) | 2014-10-08 | 2014-10-08 | For the input circuit pulse-detecting circuit of safety feature |
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| CN (1) | CN204166321U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI759717B (en) * | 2019-04-15 | 2022-04-01 | 美商葛蘭碼科技股份有限公司 | Systems and/or methods for anomaly detection and characterization in integrated circuits and non-transitory computer-readable storage medium |
| CN115657575A (en) * | 2022-12-28 | 2023-01-31 | 广东美的制冷设备有限公司 | Safety control method, safety control circuit and safety control system of robot |
-
2014
- 2014-10-08 CN CN201420576053.3U patent/CN204166321U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI759717B (en) * | 2019-04-15 | 2022-04-01 | 美商葛蘭碼科技股份有限公司 | Systems and/or methods for anomaly detection and characterization in integrated circuits and non-transitory computer-readable storage medium |
| CN115657575A (en) * | 2022-12-28 | 2023-01-31 | 广东美的制冷设备有限公司 | Safety control method, safety control circuit and safety control system of robot |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150218 Termination date: 20181008 |
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| CF01 | Termination of patent right due to non-payment of annual fee |