Abstract

A routing inspection method, a handheld routing inspection terminal and a routing inspection server. The routing inspection method comprises: collecting routing inspection data (11), the routing inspection data comprising operation parameters of a to-be-inspected device on a routing inspection site; sending the routing inspection data (12); receiving a device state indication fed back according to the sent routing inspection data and used for indicating an operation state of the to-be-inspected device (13); sending a routing inspection image of the to-be-inspected device with an abnormal operation state when the operation state of the to-be-inspected device indicated by the device state indication is abnormal (14); receiving a fault part indication fed back according to the sent routing inspection image, the fault part indication being used for marking a fault part of the to-be-inspected device (15); and displaying the fault part (16).

IPC Classes  ?

• G07C 1/20 - Checking timed patrols, e.g. of watchman

Abstract

An explosion-proof circuit, charging circuit and charging/discharging protection circuit of a battery. In the explosion-proof circuit and charging circuit of the battery, when a load is short-circuited, the voltage at the output end of a power electronic switch (Q1) is close to the voltage of the negative electrode of the battery, the voltage is divided by a control resistor (R9) and a feedback resistor (R15), so that a feedback control switch (Q3) is switched on, thus enabling the power electronic switch (Q1) to be in a cut-off state, and the load current is cut off to protect the power electronic switch (Q1) from damage; and meanwhile, the electric quantity of the battery is released in a relatively small safe current by a current limiting resistor (R7), the control resistor (R9) and the feedback resistor (R15), thereby avoiding the problem that the battery generates secondary hazards due to the fact that the electric quantity of the battery is stored in the battery and cannot be released. Since it is not necessary to give an accurate reference voltage, it is guaranteed that the circuit can reliably limit the load current, and it will not cause all the power consumption to be loaded on the electronic switch, which would result in overheating and damaging of the electronic switch.

IPC Classes  ?

• H02H 9/02 - Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
• H02H 7/18 - Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteriesEmergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for accumulators
• H02J 7/00 - Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

Abstract

A security pulse generator and methods thereof are applied in fuel dispensers. The fuel dispenser includes a flow measuring transducer and a control main board on which there is a measuring microprocessor on the control main board. The security pulse generator includes: a pulse signal generating component, which generates a corresponding pulse signal according to the rotation of the flow measuring transducer; an encoding microprocessor, which receives and transduces the pulse signal, transmits it to the control main board, and meanwhile encodes the output pulse signal; a measuring microprocessor, which receives and decodes output pulse number encoded data from the encoding microprocessor and transforms it to the output pulse number after decoding it, then compares it to the pulse number of the control main board to determine if there is suspecting frauds in the fueling process.

IPC Classes  ?

• G01F 1/00 - Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow

Abstract

A safety pulser(8) is used in a fuel dispenser equipped with a flow rate measurement converter and a control mainboard(7) having a measuring microprocessor(5), wherein the safety pulser(8) includes a pulse signal generating part(1) for producing pulse signals according to rotation of the flow rate measurement converter; an encoder microprocessor(2) for receiving and converting the pulse signals, and transmitting them to the control mainboard(7) as soon as counting and coding the output pulse signals; the measuring microprocessor(5) for receiving output pulse number coding data transmitted by the encoder microprocessor(2), and decoding them so that acquiring the pulse number, wherein the measuring microprocessor(5) compares pulse number decoded to pulse number counted by the control mainboard(7) for judging whether a fraudulent activity arising in fuel supplying process.

IPC Classes  ?

• B67D 7/32 - Arrangements of safety or warning devicesMeans for preventing unauthorised delivery of liquid
• G08C 25/00 - Arrangements for preventing or correcting errorsMonitoring arrangements
• G08C 19/16 - Electric signal transmission systems in which transmission is by pulses
• B67D 7/08 - Arrangements of devices for controlling, indicating, metering or registering quantity or price of liquid transferred
• G01F 1/00 - Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow