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A switching device and method for multi-channel pyrotechnic safety measurement

A technology for switching devices and pyrotechnics, applied in the field of measurement and control, can solve problems such as glitches, large voltages, and reduced safety

Active Publication Date: 2017-04-12
HUBEI SANJIANG AEROSPACE HONGFENG CONTROL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the particularity of the object under test, the pyrotechnics detection circuit is often driven by a weak constant current source, and at the moment of switching the constant current source, the traditional switching device and method will have a large voltage glitch, resulting in a decrease in safety

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  • A switching device and method for multi-channel pyrotechnic safety measurement
  • A switching device and method for multi-channel pyrotechnic safety measurement

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Embodiment Construction

[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0028] The invention provides a device and method for safely switching the measurement path in an automatic detection circuit for pyrotechnic products, which can realize one-time measurement of M*N circuit loads, and ensure the stability of the constant current source when the measurement path is switched, so as to improve the safety of pyrotechnic products. Measurement security.

[0029] The present invention is based on an MCU controlling multiple M:1 analog switches, adopts a cascading design, and connects (N+1) groups of measurement paths in parallel in the detection circuit. M and N are determ...

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Abstract

The invention discloses a switching device and method applied to safety measurement of multipath initiating explosive devices. Each set of measurement paths comprises an address latch and two analog switches, wherein the two analog switches are M:1 short-pole multi-throw switches and are respectively used for controlling breakover switching of a constant-current-source driving circuit and a voltage detection circuit. During each-time switching, the (N+1)th set of circuit on-load measurement paths is firstly connected, initiating explosive device paths required to be measured are connected after breakover is confirmed, and finally the (N+1)th set of circuit on-load measurement paths is disconnected and confirmed after the breakover is confirmed again, so that the power glitch produced by the constant-current-source driving circuit at the moment of connection and disconnection of the analog switches is eliminated, and safety measurement of the multipath initiating explosive devices is achieved. By means of the switching device and method, a constant current source is always kept stable, and the purpose of improving the safety of the initiating explosive devices is achieved. The switching device and method can measure loads of M*N paths in one time, and the switching method is high in safety, simple and quick.

Description

technical field [0001] The invention belongs to the technical field of measurement and control, and more specifically relates to a switching device and method applied to safety measurement of multiple explosive devices. Background technique [0002] In the detection of pyrotechnics, it is often necessary to automatically and quickly measure multiple loads to improve test efficiency. In multi-channel detection, it is necessary to switch the pyrotechnics of each channel, so as to complete the successive measurement of each pyrotechnics. Due to the particularity of the object under test, the pyrotechnics detection circuit is often driven by a weak constant current source. At the moment of switching the constant current source, the traditional switching device and method will have a large voltage glitch, resulting in a decrease in safety. . Contents of the invention [0003] In view of the defects of the prior art, the purpose of the present invention is to provide a switchi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00
Inventor 郭昊唐辉李家君丁俊
Owner HUBEI SANJIANG AEROSPACE HONGFENG CONTROL
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