Vibration gyroscope circuitry, connectable to a vibrating MEMS gyroscope, includes drive circuitry for driving the gyroscope and a measurement circuit for providing a drive measurement signal indicating displacement of a mass along a drive axis. Sense circuitry processes a sense measurement signal of the gyroscope indicating displacement of the mass along a sense axis. A digital sample clock generator includes an oscillator for generating a master clock, a counter for counting master clock periods during one period of an input signal derived from the drive measurement signal, and a number count monitor for determining during how many input signal periods the number count stays constant and for comparing a number of constant periods with a critical number of constant periods. A frequency shifter triggers the oscillator to shift the master clock frequency whenever the monitor determines that the number of constant periods exceeds the critical number of constant periods.

An energy harvester for use in-line with a pipe to harness potential and kinetic energy of fluids flowing therein. Structure for the energy harvester may include a shaft and a blade extending radially therefrom. The shaft can penetrate a housing that operates as a pipe section to install the device in-line with pipe. The shaft can couple with an electrical generator. A load may connect with voltage terminals on the generator so that fluid impinging on the blades will rotate the generator to power the load, effectively harvesting power from the flowing fluid. In one implementation, a load control device that couples with the generator voltage terminals controls a pressure characteristic of the fluid, such as pressure drop, by applying an electrical load on the generator and controllably impeding rotation of the shaft.

An energy harvester for use in-line with a pipe to harness potential and kinetic energy of fluids flowing therein. Structure for the energy harvester may include a shaft and a blade extending radially therefrom. The shaft can penetrate a housing that operates as a pipe section to install the device in-line with pipe. The shaft can couple with an electrical generator. A load may connect with voltage terminals on the generator so that fluid impinging on the blades will rotate the generator to power the load, effectively harvesting power from the flowing fluid. In one implementation, a load control device that couples with the generator voltage terminals controls a pressure characteristic of the fluid, such as pressure drop, by applying an electrical load on the generator and controllably impeding rotation of the shaft.

A meter, in particular a meter for fluids, especially liquids and preferably water, includes a housing having a fluid inlet opening and a fluid outlet opening. A turbine having radial blades is actuated by a movement of the fluid between the inlet and outlet openings. A device for measuring the movement of the turbine is mounted on the housing. A device for deviating a flow of the fluid is provided between the inlet opening and those radial blades of the turbine which are closest to the inlet opening. The flow deviating device is actuable from outside the housing, preferably manually and directly, in particular permitting easier manual adjustment of the meter.

A meter, in particular a meter for fluids, especially liquids and preferably water, includes a housing having a fluid inlet opening and a fluid outlet opening. A turbine having radial blades is actuated by a movement of the fluid between the inlet and outlet openings. A device for measuring the movement of the turbine is mounted on the housing. A device for deviating a flow of the fluid is provided between the inlet opening and those radial blades of the turbine which are closest to the inlet opening. The flow deviating device is actuable from outside the housing, preferably manually and directly, in particular permitting easier manual adjustment of the meter.

A monitor module for a turbine flow meter includes a receiver that receives a sequence of pulses sent by the turbine flow meter. A frequency identifier identifies a frequency of the pulses in the sequence of pulses and a mean identifier identifies a mean frequency of frequencies of pulses. An alert system uses the mean frequency to determine when an alert should be issued.

A monitor module for a turbine flow meter includes a receiver that receives a sequence of pulses sent by the turbine flow meter. A frequency identifier identifies a frequency of the pulses in the sequence of pulses and a mean identifier identifies a mean frequency of frequencies of pulses. An alert system uses the mean frequency to determine when an alert should be issued.

A flowmeter of the target type, having a flow-sensing probe constructed to be inserted into a pipe through a small hole. The required small size is achieved in part by allowing the probe to deflect and thus shift in orientation relative to the flow as the force on the probe changes, the resulting distortion of the signal being compensated for in firmware. The target is made contiguous with its support, maximizing the area presented to the flow relative to the size of the hole through which the probe is inserted. The flowmeter may be configured to be mounted to the outside of a pipe and include means for sealing to the outside of the pipe. It may also include pressure- and temperature-sensing elements and means to calculate mass flow of a gas.

Vibration monitors having indicator lights are described herein. An example vibration monitor includes a housing, a sensor in the housing, a light source extending circumferentially around an outer surface of the housing, and circuitry to activate the light source based on a status of the vibration monitor.