The invention relates to a hydrological
telemeter and solves the technical problems that after the power down of external
alternating current, a conventional
hydrology and water resource terminal cannot work normally, the volume is large, the
energy consumption is high, the measuring accuracy is low, the running stability is poor, and the reliability is low. The hydrological
telemeter comprises a master
control circuit board, as well as a touch display screen, a
data memory, a humiture sensor, a
switching power supply module, a water-stage gage, a water manometer, a flowmeter, a rain gage and a GPRS /
GSM module which are connected with the master
control circuit board, wherein the master
control circuit board is provided with a
central processing unit, and is connected with a solar photovoltaic plate, a PWM charging circuit and a storage battery which are connected in sequence, and the PWM charging circuit is connected with the master control circuit board; the master control circuit board is further connected with a DC / DC switching circuit connected with the
central processing unit, the
switching power supply module is connected with the DC / DC switching circuit, the
switching power supply module outputs DC12V
voltage, the DC12V
voltage is taken as the input of the DC / DC switching circuit, and the DC / DC switching circuit outputs DC3.3V
voltage. The hydrological
telemeter provided by the invention can be widely used for distant range
hydrology and water
resource information acquisition and transmission.