The invention discloses a
fiber bragg
grating pressure sensor capable of achieving positive and negative
pressure monitoring and a testing method. The
fiber bragg
grating pressure sensor comprises a connector, a filter screen, a base, an outer shell, a corrugate
pipe, a first
fiber bragg
grating, a second
fiber bragg grating, an
optical fiber, an optical cable connector, an armored optical cable, a brace, a
flange plate, an outer shell cover and a strain beam, wherein the outer shell cover is used for protecting the
optical fiber from a sealing glue sealing part to an optical cable connector part, and the strain beam is used for applying prestress. The
fiber bragg grating pressure sensor capable of achieving the positive and negative
pressure monitoring and the testing method are suitable for the monitoring of pressure safety of
oil and gas pipelines, urban underground gas pipelines,
heating power pipelines, water supplying pipelines,
oil tank pipelines, oil conveying pipelines and other
pipe networks, the potential safety hazards that an electronic sensor is electrified and is unsafe in nature are eliminated, and meanwhile the capacity of phases is also improved greatly; the
fiber bragg grating pressure sensor is applied to the aspect of real-time online monitoring of
coal and rock
mass gas pressure, errors caused by single
data monitoring are avoided, the sensitivity and the accuracy of the
system are improved, manpower,
material resources and time are saved, and meanwhile the danger probably brought by personnel on site can be avoided.